0.5.2 (2019-12-23)
------------------

Note: This release does NOT change the libsigrok public C API in incompatible
      ways. While new config keys have been added (additional enum
      entries / numbers), no existing interfaces were changed or removed.
      Frontends should continue to work fine without recompiling or relinking.

 * New supported hardware:
   - Logic analyzers:
     - Microchip PICkit2
     - Sysclk SLA5032
   - Multimeters:
     - Agilent 34405A
     - Agilent U1271
     - Agilent U1272
     - Agilent U1273
     - HP 34401A
     - Keysight 34465A
     - MASTECH MS2115B
     - Mooshimeter
   - Power supplies:
     - BK Precision 9130
     - HP 6611C
     - HP 6612C
     - HP 6613C
     - HP 6614C
     - HP 66312A
     - HP 6632A
     - HP 6634A
     - Korad KA3005P (with 0xBC as extra byte in the model ID).
     - Korad KD6005P
     - Manson HCS-3300
     - Manson HCS-3302
     - RND 320-KD3005P
     - Stamos S-LS-31
     - TENMA 72-2535 V2.1
     - Voltcraft DPPS-32-15
   - Oscilloscopes:
     - Agilent DSO1000B series
     - Hameg HMO3522
     - Rigol MSO5000 series
     - Rohde&Schwarz HMO1000 series (e.g. bug #1286)
     - Rohde&Schwarz RTA4000 series
     - Rohde&Schwarz RTB2000 series
     - Rohde&Schwarz RTC1000 series
     - Rohde&Schwarz RTM3000 series
     - YiXingDianZi MDSO
   - LCR meters:
     - MASTECH MS5308
     - PeakTech 2165
     - UNI-T UT612
     - Voltcraft 4080
   - Thermometers:
     - MASTECH MS6514
 * New config keys:
   - SR_CONF_OFFSET
   - SR_CONF_TRIGGER_PATTERN
   - SR_CONF_HIGH_RESOLUTION
   - SR_CONF_PEAK_DETECTION
   - SR_CONF_LOGIC_THRESHOLD
   - SR_CONF_LOGIC_THRESHOLD_CUSTOM
   - SR_CONF_RANGE
   - SR_CONF_DIGITS
 * New output modules:
   - wavedrom: WaveDrom JSON-based digital timing diagrams.
 * Build dependencies:
   - hidapi >= 0.8.0 (optional, used for some HID based "serial cables")
   - bluez/libbluetooth >= 4.0 (optional, used for Bluetooth/BLE; Linux-only)
   - libgio >= 2.32.0 (optional, used by some drivers)
 * C++ bindings:
   - Add Output::format().
   - Avoid "using namespace" in headers (bug #1354).
 * Python bindings:
   - Add data array for logic packet payload.
   - Add override for Context.create_logic_packet().
   - Add new Context::create_end_packet() method.
 * Backend:
   - Add support for "serial over USB HID" transport, e.g. in DMMs (bug #555).
     Supported chips/protocols: WCH CH9325, SiLabs CP2110, Brymen BU-86X IR
     adapter, Victor DMM chip.
   - Add support for Bluetooth and BLE (currently Linux-only).
   - Add support for "serial over Bluetooth/BLE" transport (used e.g. in DMMs).
   - serial: Add support for optional "RX chunk" callback.
   - Remove sr_dev_close call from std_serial_dev_acquisition_stop (bug #1271).
 * input/trace32_ad:
   - Add support for new file format (BINHDR2).
 * input/csv:
   - Unbreak re-import of CSV files.
   - Various parsing robustness improvements.
   - Introduce generic "column processing" support.
   - Various module option changes and renames.
   - Add support for analog input data.
   - Add support for timestamp columns, auto detect samplerate.
   - Add automatic format match support.
   - Set default "header" option value to true.
   - Fix incorrect/incomplete startline/newline handling (bug #968).
 * output/analog:
   - Also print meta strings (not just numbers).
 * output/vcd:
   - Use larger data type to internally store frequency.
   - Support smaller timescales with higher resolution.
 * output/csv:
   - Set default "time" option value to false.
 * scpi:
   - Add connenction_id() function to all SCPI drivers.
   - scpi_libgpib: Add mutex to SPoll.
 * dmm/bm86x:
   - Unbreak temperature modes for two probes and no probes (bug #1394).
 * brymen-bm86x, victor-dmm:
   - Removed in favor of serial-dmm based driver support.
 * scpi-pps:
   - Add support for various config keys for HP 66xxB power supplies.
   - Add init_acquisition() and update_status() for HP 66xxB power supplies.
   - Set device and channel group feature for HP 66xxB.
   - Don't use SCPI_CMD_REMOTE/_LOCAL for HP 66xxB devices when in GPIB mode.
   - Add support for various config keys for HP 66xxA power supplies.
   - Add configurable sr_mqflags.
   - Add missing frequency channel settings for acquisition.
 * hantek-4032l:
   - Fix broken triggering on low signal (bug #1402).
 * hameg-hmo:
   - Use g_byte_array_free() instead of g_free() (bug #1324).
   - Remove invalid HMO2522, add missing HMO3522 (bug #1322).
   - Add support for 16 digital (logic) channels, i.e. two pods.
   - Add support for various new config keys.
   - Avoid getting stuck upon SCPI timeouts (bug #1323).
   - Try to find a valid serialcomm if none is supplied (bug #1321).
   - When setting slope, also set trigger type to edge (bug #1328).
   - Use 1-based (not 0-based) POD numbers.
   - Fix for an incorrect samplerate being returned.
   - Fix the upper limit for the vertical scale.
 * agilent-dmm:
   - Fix support for Agilent/Keysight U1252A.
 * asix-sigma:
   - Fix a compiler warning (bug #1411).
 * beaglelogic:
   - Fix mismatched printf specifiers.
 * saleae-logic16:
   - Warn (instead of erroring out) if FPGA is unsupported.
 * demo:
   - Set an initial MQ, MQ flag and digits to the analog package.
   - Get/set measurement quantity for the analog channels.
   - Get/set amplitude while data acquisition is running.
   - Get/set new config key SR_CONF_OFFSET.
   - Add random analog signal generation.
 * korad-kaxxxxp:
   - Add SR_MQFLAG_DC flag to the current channel packet.
   - Fix bug when setting values while acquisition is running.
   - Send META packet when states have changed.
 * lecroy-xstream:
   - Remove header read, which caused issues on some devices (PR #33).
 * uni-t-ut32x:
   - Pre-set to default conn= spec.
   - Use common code for sample/time limits.
   - Improve robustness of packet parser, more diagnostics.
 * chronovu-la:
    - Fix broken triggering (#1369).
 * openbench-logic-sniffer:
   - Use 32bit for handling sample counts.
   - Extend reponse delay when scanning device (helps on Pepino).
   - Add feature to support >256K memory.
   - Introduce metadata quirks support, unbreak Logic Shrimp.
 * ftdi-la:
   - Added FTDI FT232H device ID.
   - Do enter the error path upon VID:PID mismatch (bug #1390).
 * hp-3478a:
   - Check via GPIB serial poll if new data is available.
   - Add get/set/list of measurement ranges.
   - Add get/set/list of digits.
   - Check for measurement value overflow.
 * manson-hcs-3xxx:
   - Add support for some models with changes ID string (e.g. bug #1441).
 * fx2lafw:
   - Add support for 48MHz sampling (for very short intervals only).
 * ipdbg-la:
   - Check if limit samples is valid.
   - Improve acquisition speed.
   - Fix various issues on Windows.
   - Fix an issue when capture rate is 100% (bug #1393).
 * scpi-dmm:
   - Accept serialcomm= scan options.
   - Run OPC queries immediately before essential commands.
 * brymen-bm86x:
   - Fix incorrect channel indices.
 * dmm/eev121gw:
   - Add missing scale items for sub display in power modes.
 * rigol-ds:
   - Fix memory buffer readout on DS4000 series.
 * fluke-45:
   - Avoid NULL dereference in the probe routine.
   - Disable ECHO test, it confuses other SCPI devices (bug #1272).
 ∗ fluke-dmm:
   - Fix use-after-free bugs (bug #1423).
 * rdtech-dps:
   - Synchronize read and write operations.
   - Retry sr_modbus_read_holding_registers() up to 3 times.
   - Handle different per-model current/voltage digits (bug #1385).
   - Send META package when states have changed.
 * udev:
   - Add an additional Rohde&Schwarz HMO VID/PID.
   - Add Siglent SDS1104X-E VID/PID (bug #1357).
   - Add Lecroy WaveRunner VID/PID.
 * Build system:
   - Fix an issue when building in directories that are symlinks (bug #547).
   - Fix C++ bindings compilation with Doxygen >= 1.8.16 (bug #1422).
 * Fix various memory leaks in the backend and in drivers.
 * README.devices: Update/amend docs, add more examples.

0.5.1 (2018-10-14)
------------------

Note: This release does NOT change the libsigrok public C API in incompatible
      ways. While new config keys have been added (additional enum
      entries / numbers), no existing interfaces were changed or removed.
      Frontends should continue to work fine without recompiling or relinking.

 * New supported hardware:
   - Logic analyzers:
     - DreamSourceLab DSLogic Basic
     - DreamSourceLab DSLogic Plus
     - Hantek 4032L
     - IPDBG (ipdbg.org FPGA IP debugger)
     - Meilhaus Logian-16L
     - Saleae Logic Pro 16 (experimental)
     - ZEROPLUS Logic Cube LAP-16032U
     - ZEROPLUS Logic Cube LAP-C (16128+) (bug #1045)
   - Oscilloscopes:
     - Agilent MSO7034A (experimental, digital channels not yet supported)
     - Hantek DSO-2250 (experimental)
     - Rigol DS4000 series (bug #1208)
     - Siglent SDS1000 series
     - Siglent SDS2000 series
   - Multimeters:
     - EEVblog 121GW (supports serial connection, requires BLE-serial bridge)
     - Fluke 45
     - HP 3478A
     - MASTECH MS8250D
     - Metex M-3860M
     - PeakTech 4390A
     - SparkFun 70C
     - Victor DMMs with Mini-USB connector
     - Voltcraft VC-96
   - Power supplies:
     - GW Instek GPD series
     - HP 6631B
     - HP 66332A
     - HP 6633B
     - HP 6634B
     - Korad KD3005P
     - RDTech DPS/DPH series
     - Rigol DP711
     - Rigol DP712
     - RND KA3005P
     - Tenma 72-2540
   - Electronic loads:
     - ZKETECH EBD-USB
 * New config keys:
   - SR_CONF_POWERMETER
   - SR_CONF_UNDER_VOLTAGE_CONDITION_THRESHOLD
   - SR_CONF_EXTERNAL_CLOCK_SOURCE
 * Build dependencies:
   - Drop libftdi 0.x support, require libftdi 1.x (bug #959).
 * dreamsourcelab-dslogic:
   - Split DSLogic devices into this new driver (were in fx2lafw previously).
   - Handle SR_CONF_TRIGGER_MATCH in config_list() (bug #1032).
   - Fix incorrect default/initial threshold setting.
   - Fix deinterleaving when non-contiguous set of channels is enabled.
   - Fix a triggering issue (bug #1188).
 * demo:
   - Unbreak execution with all analog channels disabled (bug #625).
   - Only send average result data when averaging is active (bug #930).
   - Don't generate analog output data for disabled channels (bug #923).
   - Skip generating data when all channels in a group are disabled (bug #923).
   - Mask out logic data for disabled channels in datafeed packets.
   - Add multi-frame and frame-count (development) feature.
   - Properly handle low samplerates.
   - Add graycode generator mode.
   - Add triggering support.
 * conrad-digi-35-cpu:
   - Add SR_CONF_LIST for voltage_target and current_limit.
 * arachnid-labs-re-load-pro:
   - Stop monitoring when open/close device.
   - Add SR_DF_META packets for changed values/states.
   - Change serial read in acquisition mode to prevent data loss.
   - Fix a rounding issue when setting a current limit.
   - Add SR_CONF_UNDER_VOLTAGE_THRESHOLD support.
   - Make SR_CONF_REGULATION listable.
   - Get a response when in acquision mode.
   - Set an encoding "digits" value for analog packets.
 * asix-sigma:
   - Propagate errors from firmware upload (bug #471).
   - Only change number of channels after successful firmware upload (bug #471).
   - Only open the USB device once; fails with newer libftdi (bug #471).
   - Download sample data upon user initiated stop, too.
 * serial-lcr:
   - Fix a double-free error (tested with PeakTech 2170).
   - Support channel selection (enable/disable P1/P2).
 * brymen-bm86x:
   - Support channel selection (enable/disable channels).
   - Fix a crash upon device closing.
 * manson-hcs-3xxx:
   - Add new name for the HCS-3304 (adjustment for new Manson firmware).
 * chronovu-la:
   - Silence overly verbose and confusing log messages.
 * beaglelogic:
   - Update scan() to return all 14 channels by default.
   - Enable seamless continuous capturing.
   - Use a flexible sampleunit depending on enabled channels.
   - Add TCP protocol support.
   - Fix a crash on device connection closing.
   - Correctly advertise samplerates via SR_CONF_SAMPLERATE/SR_CONF_LIST.
   - Fix a compiler warning (bug #1094).
 * lecroy-xstream:
   - Fix COMM_HEADER and COMM_FORMAT.
   - Use best-effort strategy for models unknown to the driver.
   - Fix trigger source/slope handling.
   - Implement config_channel_set API callback.
   - Fix sample rate handling.
   - Keep acquiring infinitely if no frame limit is set.
   - Properly handle a stopping acquisition.
   - Wait for trigger before acquiring additional frames.
 * hantek-6xxx:
   - Use lower MAX_PACKET_SIZE on Windows (bug #1048).
   - Use FIFO-based sampling, don't buffer all samples before send (bug #1214).
   - Hantek 6022BE: Add VID/PID 04b5:6022 support (bug #918).
   - Hantek 6022BL: Add VID/PID 04b5:602a support (bug #1295).
 * scpi-pps:
   - Add channel group device options for HP 663xx.
   - Use thread safe SCPI functions, return float not double (bug #779).
   - Improve switching of channel groups (PSU channels).
   - Add missing functionality for the HP 6632B power supply.
   - Add listable OVP/OCP threshold for HP 66xxx and prepared all others.
   - Don't block waiting for a value on capture stop.
   - Use software sample and time limits.
   - Fix broken channel selection code (bug #1279).
 * hameg-hmo:
   - Forward internal channel state to sigrok channel state (bug #883).
 * sysclk-lwla:
   - Fix a segfault in dev_close().
   - Fix a regression with (at least) the LWLA1034.
 * rigol-ds:
   - Fix crash when fetching logic channels (bug #1073).
   - Fix a memory leak.
   - Fix an issue causing only one channel to be acquired (bug #1018).
   - Store trigger sources and their number for each model (bug #299).
 * hantek-dso:
   - Fix segfault when accessing already free()d memory (bug #458).
 * korad-kaxxxxp:
   - Add two channels "V" and "I", remove channel "CH1".
   - Synchronize read and write operations.
 * serial-dmm:
   - Add support for multiple channels per DMM.
   - Count analog DMM channels starting at 1.
   - Print data bytes according to specific meter's packet length.
 * siglent-sds:
   - Fixed timebase problem where "ns" could not be selected (bug #1120).
   - Add an averaging function.
   - Partial fix for a USB connection problem (bug #1130).
   - Fix samplerate and memory depth calculation.
   - Better support for *-E series devices (more work might be needed).
   - Fix SR_CONF_AVERAGING/SR_CONF_AVG_SAMPLES handling.
 * hantek-4032l:
   - Various data acquisition fixes (bug #1190).
   - Add support for cleanly aborting an acquisition.
 * fx2lafw:
   - Silence message in query for channel group's device options (bug #1267).
   - Add usb-c-grok IDs for upcoming device support.
 * input/wav:
   - Fix incorrect memset() call.
   - Fix module reset issue (bug #1167).
   - Don't assume CHUNK_SIZE >= total_samples.
 * input/raw_analog:
   - Fix module reset issue (bug #1167).
   - Set appropriate precision digits for sample format (bug #950).
 * input/vcd:
   - Fixup VCD timestamp to sigrok samplenum mapping (bug #1075).
   - Abort VCD import when timestamp counts backwards (bug #1250).
   - Expand the reset() logic (bug #1306).
   - Add channel list checks for file re-read (bug #1306).
 * input/csv:
   - Make the data format option a list.
 * input/logicport:
   - Add input module for LogicPort File (*.lpf) files.
 * input/chronovu_la8:
   - Only send data to the session, don't send the header.
   - Also claim responsibility for ChronoVu LA16 files (.kdt/.kd1).
 * input/null:
   - Add this new input module (used for testing and benchmarking purposes).
 * Input modules:
   - Improve option names and descriptions.
   - Increase chunk sizes to 4MB in most cases for improved performance.
   - Add confidence (detection strength) to format_match() (bug #1200).
 * output/null:
   - Add this new output module (used for testing and benchmarking purposes).
 * output/analog:
   - Display SR_DF_META packets.
   - Convert binary to digital digits of precision (bug #950).
 * output/vcd:
   - Assign adjacent names to enabled channels (bug #519).
   - Assume packed input data image, unbreak 2nd+ channel (bug #519).
 * output/wav:
   - Change default for scale factor from 0.0 to 1.0.
 * output/csv:
   - Fix out-of-bounds array access in process_analog() (bug #1124).
   - Make the label values option a list.
   - Disable the dedup option by default.
 * Output modules:
   - Fixup trigger marker position in ascii/bits/hex output modules.
 * Fix various compiler warnings, scan-build issues, and memory leaks.
 * soft-trigger:
   - Fix a memory allocation issue (bug #1000).
   - Fix an issue causing triggers to not work.
 * session_driver: Fix an issue causing incorrect analog data reads.
 * Logging:
   - Flush log lines to cope with non-terminal output (pipes).
   - Move log level check so that it affects all handlers (bug #698).
 * SCPI:
   - Fix an issue caused by trailing whitespace handling (bug #788).
   - Synchronize read, write and write+read operations.
 * Various DMMs: Set DC flag for diode mode (bug #144).
 * All drivers:
   - Use serial_write_blocking() everywhere (bug #962).
   - Fix locale dependent string to float conversion (bug #1064).
   - Show firmware name when loading fails (bug #1262).
 * FreeBSD:
   - Ensure device is closed before usb_get_port_path() (bug #1109).
 * Metex DMMs:
   - Add missing modes and set correct digits values.
   - Add power factor measurement mode.
   - Fix incorrect measurement modes.
 * DTM0660 DMMs:
   - Do not apply the exponent twice on the value (bug #1236).
 * libsigrok API:
   - Add sr_a2l_threshold().
   - Add sr_a2l_schmitt_trigger().
   - Add sr_sprintf_ascii().
   - Add sr_snprintf_ascii().
   - Add sr_vsprintf_ascii().
   - Add sr_vsnprintf_ascii().
   - Add sr_resourcepaths_get() (bug #1128).
   - Add sr_input_module_get().
   - Add sr_log_callback_get().
   - Add sr_packet_copy().
   - Add sr_packet_free().
   - sr_parse_boolstring(): Assume bool is true when no value is specified.
   - sr_voltage_string(): Add a space before the unit.
   - sr_parse_rational():
     - Bugfix for integral parts between -0 and -1.
     - Bugfix in an error path (bug #1093).
     - Various parsing robustness improvements/fixes.
     - Accept leading whitespace.
     - Insist on some mantissa.
   - sr_analog_si_prefix_friendly(): Fix read past end of array (bug #950).
   - sr_parse_sizestring(): Support tera/peta/exa suffixes (bug #763).
 * libsigrokcxx API:
   - Add Analog::get_logic_via_threshold().
   - Add Analog::get_logic_via_schmitt_trigger().
   - Add Context::input_format_match().
   - Add Option::parse_string().
   - Add ConfigKey::parse_string().
 * backend: Emit firmware search paths in a log message.
 * Fix a driver-independent firmware loading issue (bug #1140).
 * modbus: Improve error handling.
 * Multiple internal refactorings to massively reduce per-driver boilerplate.
 * Also check $SIGROK_FIRMWARE_DIR for firmware files.
 * udev rules file:
   - Add Brymen BU-86X adapter IDs.
   - Add Rigol DP800 series IDs.
   - Add usb-c-grok IDs.
   - Rename file for correct rule ordering on systemd systems (bug #1059).
   - Split device access policy from the device database. New files:
     60-libsigrok.rules, 61-libsigrok-{plugdev,uaccess}.rules.
 * Build system:
   - Emit a warning if the C++ bindings are not being built.
   - Install MIME info file in $(datadir)/mime/packages (bug #983).

0.5.0 (2017-06-12)
------------------

Note: This release DOES change the libsigrok API. That means it is NOT
      backwards-compatible and frontends will need updates.

 * New supported hardware:
   - Logic analyzers:
     - CWAV USBee ZX (bug #764)
     - DreamSourceLab DSLogic
     - DreamSourceLab DSLogic Pro
     - FTDI LA (simple, limited logic analyzer using FTDI chips directly)
   - Oscilloscopes:
     - Hameg HMO3524
     - Hantek 6022BE
     - LeCroy X-Stream series
     - Rigol DS1074Z Plus
     - Rigol DS1104Z Plus
     - Rigol MSO2000A series
     - Rocktech BM102
     - Rohde&Schwarz HMO 1002
     - Sainsmart DDS120
   - Logic analyzers / oscilloscopes (but not MSOs):
     - Hantek 6022BL
   - Programmable power supplies:
     - Agilent N5763A
     - HP 6633A
     - Rohde&Schwarz HMC8043
   - Electronic loads:
     - Arachnid Labs Re:load Pro
   - Multimeters:
     - Agilent U1241C
     - Agilent U1242C
     - Fluke 289
     - HP 3457A
     - Keysight U1281
     - Keysight U1282
     - Metrix MX56C
     - PeakTech 3330
   - Sound level meters:
     - PCE PCE-322A
   - LCR meters:
     - PeakTech 2170
   - Signal generators:
     - Rohde&Schwarz SME0x series
 * New build dependencies (libsigrokcxx C++ library):
    - libsigrok >= 0.5.0 (the libsigrok C library)
    - A C++ compiler with full C++11 support (g++ >= 4.8.1 or clang++ >= 3.3)
 * New config keys:
   - SR_CONF_ADC_POWERLINE_CYCLES
   - SR_CONF_PROBE_FACTOR
   - SR_CONF_SIGNAL_GENERATOR
   - SR_CONF_TRIGGER_LEVEL
   - SR_CONF_UNDER_VOLTAGE_CONDITION
   - SR_CONF_UNDER_VOLTAGE_CONDITION_ACTIVE
 * New measurement quantity keys:
   - SR_MQ_HARMONIC_RATIO
 * New measurement quantity flags:
   - SR_MQFLAG_FOUR_WIRE
 * agilent-dmm:
   - Fix handling of AC/DC flags in volts mode.
   - Add support for AC/DC flags in current mode.
   - Add support for Keysight branded meters.
   - Add support for reading secondary display and temperature.
   - Add support for dBm/dBV modes.
   - Rework job management to allow for faster and configurable samplerate.
   - Add support for Log-Hand/-Trig/-Auto/-Export data sources.
   - Fix handling of the second channel of 2 channels models.
   - Add support for Vsense (Non-Contact Voltage).
 * asix-sigma:
   - Fix RLE decoder.
   - Disable support for triggers, they don't work right now (bug #359).
   - Properly decode data gathered at 100 and 200 MHz (bug #840).
   - Only download firmware when necessary.
   - Enforce optionally specified sample count (bug #838).
   - Fixup the download of the last data acquisition chunk (bug #838).
   - Various other bugfixes and internal code improvements.
 * demo:
   - Add "cable squid" logic waveform (works-with logo, many channels).
   - Add walking one/walking zero pattern.
 * deree-de5000:
   - Rename the driver to serial-lcr, allow support for multiple devices.
 * fx2lafw:
   - CWAV USBee SX: Add support for one analog channel.
   - Fix analog scaling.
   - Fix a -Wself-assign compiler warning (bug #793).
   - Warn on fail to open plausible devices (bug #867).
   - Use wide_sampling only if necessary (depends on channel config).
 * hameg-hmo:
   - Support triggering on either falling or rising edge (bug #740).
   - Terminate all commands with a linefeed for all transports (bug #784).
   - Add PATTern and BUS1/BUS2 trigger sources.
   - Fix index access for models with 2 pods / 16 digital channels.
   - Support BE format for SCPI sample downloads.
 * hantek-6xxx:
   - Fix some issues by using power-of-two data sizes (bug #821).
   - Fix AC/DC coupling selection (bug #836).
   - Only list DC coupling once (bug #822).
 * lecroy-xstream:
   - Fix config_list() capabilities listing (bug #913).
 * openbench-logic-sniffer:
   - Fix acquisition restart with trigger enabled (bug #809).
 * rigol-ds:
   - Add support for getting/setting the trigger level.
   - Properly report which channel is enabled.
   - Add probe factor support.
   - Send *OPC? after commands that don't return a value (bug #933).
 * saleae-logic16:
   - Add 20MHz and 50MHz to samplerate preset list (bug #799).
 * uni-t-ut32x:
   - Accept SR_CONF_CONN to fix the device scan.
 * ut71x:
   - Fix float printing issue in a debug message (bug #700).
   - Fix incorrect resistance values on some DMMs.
 * session:
   - Fix memory allocation issue in sr_packet_copy().
   - Increase chunk size for slightly better performance.
   - Fix a segfault when input files were read multiple times.
   - Fix missing data when input files were read multiple times (bug #944).
 * analog:
   - Improve output readability by using SI prefix.
 * scpi:
   - Fix remote locking according to USBTMC spec (bug #783).
   - Various internal improvements to better handle corner cases.
 * scpi/vxi:
   - Fix incomplete reads (bug #790).
 * input/vcd:
   - Skip BOM at beginning of file (bug #755).
 * input/trace32_ad:
   - Make the sample rate an option.
 * output/srzip:
   - Add support for storing analog channels.
 * output/analog:
   - Drop obsolete and duplicate functions (bug #636).
   - Fix incorrect displaying of the values for certain digits settings.
 * output/csv:
   - Fix a segfault when using non-hardware input.
   - Fix a segfault due to a g_malloc() allocating too few bytes.
   - Add an option to output units for column labels.
   - Fix segfaults related to incorrect indices and unitsizes (bug #844).
   - Fix a false negative after successful import causing frontend issues.
   - Skip leading UTF-8 BOM in the input stream (bug #756).
   - Correctly skip over last processed end-of-line sequence and accept
     absence of last end-of-line termination sequence (bug #635).
   - Send larger datafeed chunks, to speed up import.
 * output/ascii:
   - Add support for user configurable character set.
 * output/gnuplot:
   - Remove, obsoleted by the improved CSV module.
 * bindings:
   - Link C++ code with gnustl_shared if it exists (Android).
   - Flesh out the analog payload bindings.
 * bindings/cxx:
   - Fixup memory leak in input module receive() calls (bug #976).
   - Fix various -Wundefined-var-template clang warnings (bug #915).
 * bindings/ruby:
   - Fix out-of-tree build (bug #797).
   - Fix distribution of Ruby bindings (bug #741).
   - Fix Ruby bindings build on Mac OS X and FreeBSD (bug #800).
   - Fix the build with BSD Make (bug #801).
   - Make the Ruby bindings build with Ruby 2.0 again.
 * bindings/java:
   - Use correct JNI function when calling Vector.add.
 * Build system:
   - Use latest AX_CXX_COMPILE_STDCXX (bug #795).
   - Fix linker issues related to --whole-archive (bug #802).
   - Don't access the sr_driver_list with no driver compiled (bug #820).
   - Fix a build issue related to C++ compiler flags (bug #865).
   - configure summary: Show whether shared/static build is enabled.
   - configure summary: Show linker flags.
   - uninstall: Remove empty include directories (bug #861).
 * udev rules file:
   - Add TAG+="uaccess" for systemd, keep plugdev group as well (bug #665).
   - Use 660 permissions (bug #665).
   - Add various new USB VID/PID pairs for newly-supported hardware.
 * Add a MIME info file (and icons) for sigrok session files (bug #857).
 * Various internal refactorings and improvements.
   - Add sr_sw_limits_*() helper functions for software limits.
   - Add and use the standard cleanup helper std_cleanup().
   - Add std_scan_complete() helper function for scan completion.
 * All drivers were converted to use the new SR_DF_ANALOG format, support
   for SR_DF_ANALOG_OLD has been dropped (bug #728).
 * Many drivers now report the correct number of digits in analog packets.
 * resource: Improve logging output (bug #806).
 * Fix an issue with analog packets with digits=0 (bug #815).
 * Fix a crash when scanning for devices with no options provided (bug #786).
 * Fix a segfault with input/ouput modules (bug #813).
 * Fix various compiler warnings.
 * Fix various memory leaks.
 * Remove FSF postal address from boiler plate license text.
 * Various Doxygen fixes and improvements.
 * README.devices: Update firmware related (and other) information.
 * HACKING: Update URL to Linux kernel coding style.

0.4.0 (2016-01-29)
------------------

Note: This release DOES change the libsigrok API. That means it is NOT
      backwards-compatible and frontends will need updates.

 * New supported hardware:
   - Logic analyzers:
     - AKIP-9101
     - BeagleLogic
     - LeCroy LogicStudio
     - mcupro Logic16 clone
     - Pipistrello OLS
     - Sysclk LWLA1016
   - Oscilloscopes:
     - Rigol/Agilent DS1000Z series
     - Yokogawa DLM2000 series
     - Yokogawa DL9000 series
     - Hung-Chang DSO-2100
     - GW Instek GDS-800
   - Multimeters:
     - Agilent U1241A/B
     - Agilent U1242A/B
     - Brymen BM25x series
     - MASTECH MS8250B
     - Metrahit 16T/16U/KMM2002
     - PeakTech 3415
     - Tenma 72-7730
     - Tenma 72-7732
     - Tenma 72-9380A
     - Testo 435-4
     - UNI-T UT372
     - UNI-T UT71x series (UT71A/B/C/D/E)
     - Velleman DVM4100
     - Voltcraft VC-870
     - Voltcraft VC-920
     - Voltcraft VC-940
     - Voltcraft VC-960
   - Programmable power supplies:
     - Fluke/Philips PM2800 series
     - HP 663xx series
     - Manson HCS-3xxx series
     - Motech LPS-30x series
     - Rigol DP800 series
     - Korad KAxxxxP series (a.k.a Velleman LABPS3005D and others)
   - AC/DC sources:
     - Agilent N5700A series (DC sources)
     - Chroma 61600 series (AC sources)
     - Chroma 62000 series (DC sources)
   - Electronic loads:
     - Maynuo M97 (and compatibles)
   - LCR meters:
     - DER EE DE-5000
   - Scales:
     - KERN EW 6200-2NM
   - BeagleBone Black capes:
     - BayLibre ACME (revA and revB)
 * New input modules:
   - raw_analog: Raw analog signals in various formats
   - trace32_ad: Lauterbach Trace32 logic analyzer data
 * New output modules:
   - wav: Waveform audio file format
   - srzip: Native ZIP-based sigrok file format
 * Add libsigrok language bindings based on SWIG + doxygen:
   - C++ language bindings
   - Python language bindings
   - Ruby language bindings
   - Java language bindings
 * Add a Modbus framework in order to be able to support Modbus based devices.
   - Add a Modbus RTU backend.
 * Add a new, more flexible trigger framework.
 * Add a generic software-trigger framework usable by any driver, currently
   used by fx2lafw and saleae-logic16.
 * Add a (Linux-only) GPIB SCPI backend using linux-gpib and libgpib.
 * Add a generic scpi-pps driver which supports various power supplies.
 * Add an experimental framework for "transforms" which can perform operations
   on libsigrok session packets. This will be changed and improved upon in
   later releases. Currently implemented tranforms:
   - nop: Do nothing, pass on packets unmodified.
   - scale: Scale all analog values by a specified factor.
   - invert: Invert all the data values.
     - An analog value of x becomes 1/x.
     - A digital value of 0 becomes 1 (and vice versa).
 * input:
   - Introduce a new input module API.
   - Rename "input format" to "input module" everywhere.
   - Add a preferred file extension field (bug #541).
 * output:
   - Fix output option enumeration.
   - Fix a double-free issue.
   - Add a preferred file extension field (bug #541).
 * input/csv:
   - Avoid a segfault related to the obsolete mimetype format match (bug #681).
 * input/vcd:
   - Chunk up samples in 1MB blocks for better performance (bug #551).
   - Allow optional index items (bug #322).
   - Add support for 1 bit vectors (bug #723).
 * input/wav:
   - Fix an offset calculation error.
   - Properly initialize the channel list early enough (bug #387).
 * output/analog:
   - Fix channel deinterleaving.
 * output/csv:
   - Match format based on .csv extention in the filename.
   - Add support for analog data/packets.
 * New or updated build dependencies:
   - New build dependencies (libsigrok C library):
     - libgpib (optional)
     - libieee1284 (optional)
   - Updated build dependencies (libsigrok C library):
     - libserialport >= 0.1.1 (optional)
     - librevisa >= 0.0.20130412 (optional)
     - libftdi >= 0.16 or libftdi1 >= 1.0 (optional)
   - New build dependencies (libsigrokcxx C++ library):
     - libsigrok >= 0.4.0 (the libsigrok C library, see above)
     - A C++ compiler with C++11 support (g++ >= 4.7 or clang++ >= 3.1)
     - doxygen (required for building the C++ library!)
     - graphviz (optional, only needed for C++ API docs)
     - Python (2 or 3) executable (development files are not needed)
     - glibmm-2.4 (>= 2.32.0)
   - New build dependencies (libsigrok Python bindings):
     - libsigrokcxx >= 0.4.0 (the libsigrok C++ bindings, see above)
     - Python >= 2.7 or Python >= 3 (including development files!)
     - Python setuptools (for Python 2 or 3)
     - pygobject >= 3.0.0 (for Python 2 or 3), a.k.a python-gi
     - numpy (for Python 2 or 3)
     - SWIG >= 2.0.0
     - doxygen (optional, only needed for the Python API docs)
     - graphviz (optional, only needed for the Python API docs)
     - doxypy (optional, only needed for the Python API docs)
   - New build dependencies (libsigrok Ruby bindings):
     - libsigrokcxx >= 0.4.0 (the libsigrok C++ bindings, see above)
     - Ruby >= 1.9.3 (including development files!)
     - SWIG >= 3.0.8
     - YARD (optional, only needed for the Ruby API docs)
   - New build dependencies (libsigrok Java bindings):
     - libsigrokcxx >= 0.4.0 (the libsigrok C++ bindings, see above)
     - SWIG >= 2.0.0
     - Java JDK (for JNI includes and the javac/jar binaries)
     - doxygen (optional, only needed for the Java API docs)
     - graphviz (optional, only needed for the Java API docs)
 * Build system:
   - Modernize the whole autotools setup.
   - Add --with-libserialport, --with-libftdi, --with-libusb,
     --with-librevisa, --with-libgpib, --with-libieee1284.
   - Add --enable-bindings, --enable-cxx, --enable-python, --enable-ruby,
     and --enable-java.
   - Support both libftdi >= 0.16 and libftdi1 >= 1.0.
   - configure: Show SCPI backends that'll be compiled.
   - Unconditionally build src/lcr/es51919.c (bug #545).
   - Compile with -std=c99 and _POSIX_C_SOURCE=200112L by default.
   - Only link the 'check' library against the unit tests.
   - Fix various out-of-tree build issues (e.g. bug #473).
   - Don't set CFLAGS, LDFLAGS, etc. in configure.ac or Makefile.am (bug #578).
   - Check for the numpy Python module (bug #533).
   - Check for zip_discard(), provide alternative if not available (bug #674).
 * Portability:
   - Android: Add fallbacks for missing stoi()/stod(). 
   - FreeBSD: Fix a libusb related compiler error.
   - FreeBSD: Fix an issue with libusb_get_port_numbers().
   - FreeBSD: Fix an issue with BSD Make (bug #556).
   - FreeBSD: Fix an issue with SWIG detection (bug #557).
   - FreeBSD: Fix a build issue related to isascii() (bug #649).
   - Mac OS X: Fix 'sed' invocation in autogen.sh (bug #516).
   - Mac OS X: Fix a usb_get_port_path() related issue (bug #673).
   - Windows: Fix some thread-related issues causing hangs (bugs #343, #328).
   - Windows: Fix a USB/thread related issue (bug #343).
   - Windows: Fix shared (non-static) build.
   - Windows: Fix various warnings related to a missing LIBUSB_CALL item.
   - Windows: Add a missing WSAStartup() call to fix scpi/tcp (bug #692).
   - Fix an issue with non-GNU Make (bug #628).
   - Avoid std::map::emplace() for GCC 4.7 compatibility (bug #720).
   - Avoid g_close() to not unnecessarily require glib >= 2.36 (bug #724).
 * Language bindings:
   - Support new output API.
   - Add Doxygen docs for all language bindings.
   - C++: Fix a C++ bindings linking issue (bug #534).
   - Python: Fix mapping of vector & map attributes to Python types (bug #382).
   - Python: Implement equality checks for EnumValue derived classes (bug #443).
   - Python: Handle import failures without crashing.
   - Python: Fix an installation issue (bug #644).
   - Python: Prevent a numpy deprecation warning (bug #417).
   - Python: Fix a ConfigKey.parse_string() crash (bug #483).
   - Python: Fix the build for Python 3 (bug #645).
   - Python: Fix some string conversion issues for Python 3 (bug #478).
   - Python: Fix a SWIG related memory leak (bug #479).
   - Python: Make device.config_keys() act like a Python dict (bug #480).
   - Python: Provide sensible __str__() and __repr__() for enums (bug #688).
   - Java: Install files into DESTDIR (bug #537).
   - Java: Fix some SWIG warnings due to %extend redefinitions (bug #417).
   - Java: Fix an issue related to C/C++ style casts (bug #688).
   - Java: Fix a reference leak (bug #690).
   - Session::set_trigger(): Fix segfault conditions (bugs #491, #496).
 * Various API changes, additions and removals (see API docs for details).
 * Add various new config keys, config info types, measurement quantity keys,
   measurement quantity flags, units, device instance types, and error codes.
 * udev rules file: Add entries for newly supported hardware.
 * Add/use a new resource access API, defaults to XDG data dirs.
 * Switch to a new SR_DF_ANALOG format (bug #640).
 * All drivers:
   - Publish config key capabilities.
   - Gather connection info and serial number, if any.
   - Cleanups of serial port based drivers wrt (non-)blocking reads/writes.
 * Various drivers:
   - Use physical USB connection instead of sdi->index.
   - Fix blocking serial write timeout (bugs #436, #437, #433, #428, #427,
     #430, #432, #434, #438).
 * agilent-dmm:
   - Fix value parser to consider 0.0 to be a valid result.
   - Correctly parse negative overload.
   - Add RMS flag to AC voltage modes.
   - Add provisional support for the U124xx.
   - U124xx/U125xx: Support 5 more modes (resistance, capacitance, frequency,
     continuity, and temperature).
   - Add current loop sensor support.
   - Fix frequency support.
 * beaglelogic:
   - Add SR_CONF_CAPTURE_RATIO support.
 * brymen-bm86x:
   - Add current loop sensor support.
 * chronovu-la:
   - Properly handle multiple ChronoVu devices being attached (bug #504).
 * colead-slm:
   - Properly check acquisition sample limit.
 * demo:
   - Add support for continuous acquisition.
   - Fix a memory leak related to channel groups.
   - Support changing the amplitude of analog channels.
   - Adds a new channel group "Analog", which has all analog channels in it.
   - Attach analog generator to channel, not channel group.
   - Provide a separate property list for the analog group (bug #505).
   - Fix an issue by always honoring sample limit changes (bug #314).
   - Fix square pattern output being shorter than other patterns.
   - Fix analog output at low samplerates.
   - Fix SR_CONF_DEVICE_OPTIONS variant type.
   - Fix an infinite loop when 0 channels of one type were used.
 * fx2lafw:
   - Fix continuous mode usage with output modules (bug #380).
   - Check for a valid samplerate before trying to set it (bug #386).
   - Fix wide (16bit) sampling case (bug #373).
   - Add SR_CONF_CAPTURE_RATIO support.
   - Set up the transfer first, then start the acquisition (bug #574).
   - Avoid the need to run "rmmod usbtest" on Linux for devices
     with the standard Cypress FX2 USB VID/PID of 04b4:8613 (bug #445).
   - Add support for the official fx2lafw sigrok VID/PID pairs and firmware
     (this requires sigrok-firmware-fx2lafw >= 0.1.3):
     - 1D50:608C: fx2lafw-sigrok-fx2-8ch.fw
     - 1D50:608D: fx2lafw-sigrok-fx2-16ch.fw
 * gmc-mh-1x-2x:
   - Add support for the Metrahit Metrahit 16T, 16U, and KMM2002.
   - Complete energy measurement ranges (V, A, W) for Metrahit 29S.
 * hameg-hmo:
   - Implement SR_CONF_SCAN_OPTIONS.
   - Make sure the enabled_channels list is empty before populating it.
   - Fix reading of analog data from an HMO1024 (Firmware 04.527).
   - Fix a double-free issue.
   - Fix a floating point comparison issue (bug #731).
 * hantek-dso:
   - Properly zero out MQ flags.
   - Fix driver/global/channel group config keys.
 * ikalogic-scanalogic2:
   - Fix a segfault condition (bug #440).
 * ikalogic-scanaplus:
   - Fix a memory leak and a memory allocation issue.
 * kecheng-kc-330b:
   - Fix missing time/frequency weighting.
 * lascar-el-usb:
   - Fix issues caused by copy-paste errors.
 * ols:
   - Fix a serial port related issue on FreeBSD (bug #414).
   - Fix detection and acquisition on Windows (bug #562).
   - Fix an event source related acquisition issue (bug #678).
   - Fix a portability issue due to direct use of FDs (bug #205).
 * rigol-ds:
   - Fix duplicated vendor string for Agilent devices.
   - Replace magic numbers by appropriate constant or variable (bug #406).
   - Handle POSITIVE/NEGATIVE (instead of POS/NEG) correctly (bug #558).
   - Add missing 20/50/100V vdiv entries.
   - Fix an issue related to the search for the closest vdiv.
   - Return the actual hardware num_vdiv and vdiv list.
   - Fix the smallest supported vdiv for the DS2000 series.
   - Fix a double-free issue.
   - SR_CONF_DATA_SOURCE is a device option, not per channel group.
 * saleae-logic16:
   - Recognize the FPGA FIFO overflow status.
   - Downgrade error during capture to a message (bug #466).
   - Add SR_CONF_CAPTURE_RATIO support.
   - Support new bitstream version 1.3 with renumbered registers.
   - Publish samplerates according to selected channels (bug #646).
 * serial-dmm:
   - Fix RadioShack 22-812 DMM incorrect readings (bug #657).
   - Implement request timeout feature (bug #345).
 * sysclk-lwla:
   - Do not create channels in reverse order.
   - Fix an issue related to sdi->connection_id (bug #441).
   - Various robustness improvements.
   - Fix a compile issue (bug #714).
   - Work around some vendor FX2 firmware issues.
 * zeroplus-logic-cube:
   - Fix an issue when trying to trigger on a channel being 0/low.
 * README: Drop obsolete sigrok-commits mailing list.
 * Fix a Doxyfile issue which caused build failures e.g. on buildroot.
 * Fix a USB timeout related sr_session_iteration() issue (bug #571).
 * Fix various gcc/clang compiler errors/warnings (e.g. bugs #637, #721).
 * Fix an issue related to multiple sr_init()/sr_exit() calls (bug #565).
 * Fix an issue with transform packet passing (bug #631).
 * Rename sr_dev_driver.priv to .context (bug #442).
 * serial: Re-implement sr_serial_find_usb() using new libserialport APIs.
 * Unit tests: Add some checks for session handling.
 * scpi and scpi/usbtmc:
   - Accept *IDN responses with more than 4 tokens (some devices need this).
   - Fix incomplete data issue for e.g. Hameg HMO1024.
   - Support the RL1 feature.
   - Implement Rigol DS1000 workaround on any firmware version (bug #354).
 * Various session related changes and improvements.
 * The code now uses the Glib main loop as backend.
 * Logging: Add a timestamp (at DBG/SPEW loglevel) to all log messages.
 * Fix a trigger related segfault (bug #550).
 * Don't check the libusb_get_device_descriptor() return code (bug #658).
 * Fix various memory leaks in the code (e.g. bugs #629, #630, #632).
 * session_file: Enable only probes listed in metadata (bugs #410, #495).

0.3.0 (2014-05-06)
------------------

Note: This release DOES change the libsigrok API. That means it is NOT
      backwards-compatible and frontends will need updates.

 * New supported hardware:
   - Logic analyzers:
     - ChronoVu LA16
     - Sysclk LWLA1034
   - Oscilloscopes:
     - Agilent DSO1000 series (various models)
     - Hameg HMO compact series (various models)
     - Rigol DS2000 series (various models)
     - Rigol VS5000 series (various models)
   - Multimeters:
     - BBC Goerz Metrawatt M2110
     - Brymen BM869
     - Fluke 189
     - Gossen Metrawatt MetraHIT 1x/2x series (various models)
     - Tenma 72-7745 (rebadged UNI-T UT60E)
     - Tenma 72-7750 (rebadged UNI-T UT60G)
     - UNI-T UT60G
     - UNI-T UT61B
     - UNI-T UT61C
     - V&A VA40B
     - Voltcraft M-3650CR
     - Voltcraft ME-42
   - Thermometers:
     - APPA 55II
   - Programmable power supplies:
     - Atten PPS3000 series (various models, tested on PPS3203T-3S).
     - Conrad DIGI 35 CPU
 * Add support for channel groups.
 * Add generic SCPI backend code which can be used via various transports:
   - Serial ports
   - USBTMC
   - TCP/RAW
   - TCP/Rigol (Rigol-VS5000 series specific)
   - VXI
   - librevisa
 * udev rules file: Add entries for newly supported hardware.
 * New config keys:
   - SR_CONF_DEMODULATOR
   - SR_CONF_CENTER_FREQUENCY
   - SR_CONF_NUM_LOGIC_CHANNELS
   - SR_CONF_NUM_ANALOG_CHANNELS
   - SR_CONF_CLOCK_EDGE
   - SR_CONF_POWER_SUPPLY
   - SR_CONF_OUTPUT_VOLTAGE
   - SR_CONF_OUTPUT_VOLTAGE_MAX
   - SR_CONF_OUTPUT_CURRENT
   - SR_CONF_OUTPUT_CURRENT_MAX
   - SR_CONF_OUTPUT_ENABLED
   - SR_CONF_OUTPUT_CHANNEL
   - SR_CONF_OVER_VOLTAGE_PROTECTION
   - SR_CONF_OVER_CURRENT_PROTECTION
   - SR_CONF_DEVICE_MODE
   - SR_CONF_TEST_MODE
 * New config info types:
   - SR_T_INT32
 * New measurement quantity keys:
   - SR_MQ_TIME
 * New measurement quantity flags:
   - SR_MQFLAG_DURATION
   - SR_MQFLAG_AVG
 * New device instance types:
   - SR_INST_SCPI
 * New error codes:
   - SR_ERR_CHANNEL_GROUP
 ∗ The SR_T_CHAR config type has been renamed to SR_T_STRING.
 * New build dependencies:
   - libserialport >= 0.1.0 (optional).
     - All drivers that talk to serial ports now require libserialport.
     - If libserialport is not found, those drivers will not be built.
   - librevisa >= 0.0.20130812 (optional, only used by some drivers).
 * Dropped build dependencies:
   - libasound2 is no longer required (only the removed alsa driver used it).
   - libudev is no longer required (only the removed link-mso19 driver used it).
 * Serial port handling code:
   - Add support for 5/6 data bits and non-standard baud rates.
   - Fix an issue related to nonblocking reads (bug #188).
   - Fix an 'invalid arguments' condition causing problems (bug #192).
 * alsa: This driver was removed (also fixes bugs #28, #61, #96, #114).
 * asix-sigma:
   - Publish SR_CONF_CAPTURE_RATIO correctly (bugs #287, #291).
   - Don't set invalid config options (bug #86).
   - Various other bugfixes.
 * cem-dt-885x: Fix a code portability issue (bug #267).
 * chronovu-la:
   - Rename the 'chronovu-la8' driver to 'chronovu-la'.
   - Add support for the ChronoVu LA16.
   - Fix a segfault when doing multiple acquisitions on an LA8 (bug #247).
   - Document that streaming is not possible for LA8/LA16 (bug #261).
 * demo:
   - Add support for analog channels (bug #11).
   - Make the number of channels user-configurable.
   - Add per-channel-group options.
   - Implement analog sample patterns: sine, triangle, sawtooth.
   - Fix a samplerate related issue with rates >= 50kHz (bugs #294, #295).
   - Fix an issue causing data glitches every 40ms (bug #297).
   - Fix an issue related to channel group handling (bug #262).
 * digitek-dt4000zc: Fix driver on NetBSD due to missing DTR=1 (bug #189).
 * fx2lafw:
   - Fix incorrect unitsize when a trigger fires (bug #182).
   - Implement config_get() for SR_CONF_LIMIT_SAMPLES.
   - Don't send more samples than requested to the session bus.
 * gmc-mh-1x-2x:
   - Add new (sub)driver 'gmc-mh-2x-bd232'.
   - Add support for the SI232-II interface.
 * hameg-hmo:
   - Fix a build issue on Mac OS X (bug #216).
   - Various fixes related to frame limit, samplerate, options, etc.
 * link-mso19: Drop unfinished driver for now (until it starts working).
 * openbench-logic-sniffer:
   - Fix a serial port related issue/hang, seen on (e.g.) NetBSD.
   - Fix an SR_CONF_PATTERN_MODE related problem (bugs #184, #190).
   - Fix a serial (non)blocking mode issue (bug #231).
   - Temporarily disable the driver on Windows (needs portability fixes).
   - Fix an endianness issue in the protocol handling (bug #135).
   - Fix a sampling issue when (samples % 4) != 0 (bug #200).
   - Fix an issue occurring when all channels were disabled (bugs #316, #347).
   - Add an option to turn test patterns off again (bug #293).
 * rigol-ds:
   - Rename the 'rigol-ds1xx2' driver to 'rigol-ds'.
   - Add support for more models and unify the driver code (bug #212).
   - Add support for RS232 connectivity (previously only USBTMC worked).
   - Enable the driver on non-Linux platforms since all transports the driver
     uses are provided by cross-platform code/libs now (e.g. serial, USBTMC).
   - Add support for 4 channels (required by some models).
   - Add support for channel groups.
   - Advertise SR_CONF_LIMIT_FRAMES support.
   - Fix an issue with SR_DF_END sending.
   - Enable/disable LA pod when (de)selecting digital channels.
   - Disable key lock when closing device.
   - Work around issues due to DS1000 specific protocol changes (bug #283).
   - Fix incorrect digital channel numbers on some models (bug #269).
   - Fix an issue with partial data reads (bugs #220, #209, #207).
 * saleae-logic16:
   - Fix an issue related to USB device claiming (bug #159).
   - Don't send more samples than requested to the session bus (bug #350).
   - Use unitsize 1 (not 2) if none of channels 8-15 are used.
 * serial-dmm: Fix some parse issues by increasing a timeout.
 * sysclk-lwla: Fix a sampling issue related to a glib API call (bug #270).
 * uni-t-ut32x: Fix typo which prevented usage with multiple devices.
 * victor-dmm: Fix MIN/MAX always being reported (bug #228).
 * zeroplus-logic-cube:
   - Add support for 32-channel models and additional memory sizes.
   - Fix a frontend issue due to missing SR_CONF_CAPTURE_RATIO.
   - Fix an issue causing pre-trigger garbage data to be sent (bug #222).
   - Add initial voltage threshold support.
 * Various drivers:
   - Expose missing SR_CONF_TRIGGER_TYPE.
   - Report max. possible number of samples (bugs #197, #258, #263).
 * Output modules:
   - Skip analog channels in logic-only output formats.
   - Remove the obsolete output module API, add wrapper calls for the new one.
   - Stop using the obsolete output API (bugs #288, #47, #48).
   - Properly receive and handle samplerate metadata (bug #46).
 * input/vcd: Abort with an error upon > 64 channels (bug #194).
 * output/vcd:
   - Fix output for more than 8 channels.
   - Output timestamp only once per change.
   - Minor whitespace changes of output files to make them more readable.
   - Remove bogus $dumpvars and $dumpoff commands.
   - Various bugfixes and portability fixes.
 * output/csv:
   - Remove a 64-channel limit (bug #193).
   - Fix an issue resulting in incorrect trailing commas (bug #230).
   - Fix an issue where all timestamps would be zero (bug #35).
 * Rename 'probe' to 'channel' in all places, since libsigrok supports a lot
   of gear where 'channel' fits better (bug #259).
 * Change TRIGGER_SLOPE from SR_T_UINT64 to SR_T_STRING.
 * Windows support improvements:
   - Use libserialport (+other backend code) to fix serial devices (bug #91).
   - Add serial source addition/removal backend code (bug #206).
   - Add backend code for properly supporting USB based devices.
 * Fix various memory leaks in the backend code.
 * Fix some incorrect parsing of floating point numbers in the strutil code.
 * Fix various endianness issues in backend code and drivers (bug #266).
 * Fix a few issues related to incorrect parsing with non-ANSI-C locales
   (bugs #271, #272, #273, #274).
 * Fix an issue related to data being sent to the libsigrok session which
   was not a multiple of the unit/sample size (bugs, #289, #290).
 * Drop the es51922 DMM parser (replaced by the generic es519xx parser).
 * libsigrok session files:
   - The libsigrok session file format (for *.sr files) has changed, and the
     file format 'version' field is bumped to 2. Older libsigrok versions will
     not be able to handle version 2 files, but new libsigrok versions can
     handle both version 1 and version 2 files. New libsigrok versions will
     always write/output version 2 files.
   - Fix an issue resulting in left-over temporary files (bug #276).
   - Fix an issue with analog probes (unsupported) in *.sr files (bug #277).
   - Fix an issue with missing samplerate from session files (bug #275).
 * Improved API documentation.
 * Major API changes (overview):
   - Change various function/macro names related to the probe->channel rename.
   - Change various functions due to the new channel group feature.
   - All enums in the public API now have names (e.g. 'enum sr_mqflag').
   - The lib no longer defines names with _t suffix (POSIX reserved).
   - New API calls:
      - sr_session_dev_list()
      - sr_session_save_init()
      - sr_session_append()
      - sr_config_commit()
      - sr_output_new()
      - sr_output_send()
      - sr_output_free()
   - Obsoleted and removed API calls:
      - sr_filter_channels()
   - 'struct sr_session' is now opaque (contents shouldn't be used directly).
   - Please see the Doxygen API documentation for further details.
 * Build system:
   - Switch to a non-recursive automake setup (fewer files, faster builds).
   - configure: Clearly mark required and optional libs.

0.2.2 (2013-11-04)
------------------

Note: This release does NOT change the libsigrok API. While new config keys,
      config info types, and unit codes have been added (additional enum
      entries / numbers), no existing interfaces were added/changed/removed.
      Frontends should continue to work fine without recompiling or relinking.

 * New supported hardware:
   - Logic analyzers:
     - Saleae Logic16
   - Thermometers:
     - Center 309
     - UNI-T UT325
     - Voltcraft K204
   - Multimeters:
     - ISOTECH IDM103N
     - Metex M-4650CR
     - Norma DM950
     - Voltcraft M-4650CR
   - Energy meters:
     - EDF Teleinfo
 * New config keys:
   - SR_CONF_VOLTAGE_THRESHOLD
   - SR_CONF_EXTERNAL_CLOCK
   - SR_CONF_SWAP
   - SR_CONF_ENERGYMETER
 * New config info types:
   - SR_T_DOUBLE_RANGE
 * New units:
   - SR_UNIT_REVOLUTIONS_PER_MINUTE
   - SR_UNIT_VOLT_AMPERE
   - SR_UNIT_WATT
   - SR_UNIT_WATT_HOUR
 * New input modules:
   - csv (comma-separated values)
 * Bump required libzip version to >= 0.10.
 * uni-t-dmm: This driver now requires the specification of the USB VID/PID
   of the cable that is used. Example for sigrok-cli:
    - Old: sigrok-cli --driver voltcraft-vc820 ...
    - New: sigrok-cli --driver voltcraft-vc820:conn=1a86.e008 ...
 * openbench-logic-sniffer:
   - Initial test pattern support (SR_CONF_PATTERN_MODE).
   - Initial external clock support (SR_CONF_EXTERNAL_CLOCK).
   - Initial channel swap support (SR_CONF_SWAP).
   - Various minor fixes and improvements.
 * When a frontend adds a device instance to a running session, start
   acquisition on it. This helps with the collectd use-case where devices
   can be removed and added dynamically while a session is running.
 * rigol-ds1xx2: Support newer Linux kernels with USBTMC in /sys/class/usbmisc.
 * rigol-ds1xx2: Also detect the Rigol DS1152E/DS1152D.
 * agilent-dmm: Fix a segfault happening in certain cases.
 * output/analog: Support all currently known MQFLAGs.
 * Fix a minor compile issue due to an incorrect #include.
 * Fix two compile issues on FreeBSD (bug #185).
 * es519xx: New generic parser for various Cyrustek DMM ICs.
 * es51922/fs9721/fs9922/metex14: Use diode MQFLAG (bug #141).
 * voltcraft-vc830: Fix diode mode handling (bug #142).
 * Add the missing HACKING file to the tarball.
 * README.devices: Updates/notes for newly added devices.

0.2.1 (2013-08-07)
------------------

Note: This release does NOT change the libsigrok API. While new config keys,
      config info types, and error codes have been added (additional enum
      entries / numbers), no existing interfaces were added/changed/removed.
      Frontends should continue to work fine without recompiling or relinking.

 * New supported hardware:
   - Logic analyzers:
     - IKALOGIC Scanalogic-2
     - IKALOGIC ScanaPLUS
   - Sound level meters:
     - CEM DT-8852
     - Kecheng KC-330B
   - Multimeters:
     - UNI-T UT60A
     - UNI-T UT60E
     - Voltcraft M-3650D
     - Voltcraft VC-830
 * Drop the Tecpel DMM-8060 (doesn't have PC connectivity).
 * New config keys:
   - SR_CONF_SPL_WEIGHT_FREQ
   - SR_CONF_SPL_WEIGHT_TIME
   - SR_CONF_SPL_MEASUREMENT_RANGE
   - SR_CONF_HOLD_MIN
   - SR_CONF_HOLD_MAX
   - SR_CONF_POWER_OFF
   - SR_CONF_DATA_SOURCE
 * New config info types:
   - SR_T_UINT64_RANGE
 * New error codes:
   - SR_ERR_TIMEOUT
 * Always link against libm, the math library (bug #115).
 * Fix a bug in sr_si_string_u64() at al (bug #73).
 * output/csv: Fix incorrect probe order.
 * alsa: Fix a double-free issue (bug #129).
 * zeroplus-logic-cube: Fix a bug in the driver cleanup code.
 * ikalogic-scanalogic2: Use GET_REPORT (bug #130).
 * uni-t-dmm: Fix a bug breaking the UNI-T UT61E (bug #136).
 * Various internal consistency fixes and code cleanups.
 * Improved Doxygen documentation.
 * Fixed various memory leaks.

0.2.0 (2013-05-04)
------------------

Note: This release DOES change the libsigrok API. That means it is NOT
      backwards-compatible and frontends will need updates.

 * Support for analog sources (oscilloscopes, DMMs, data loggers) was added.
 * New supported hardware:
   - Logic analyzers:
     - CWAV USBee DX
     - ZEROPLUS LAP-16128U
   - Oscilloscopes:
     - Hantek DSO-2090 (USB scope)
     - Rigol DS1052D
     - Rigol DS1052E
     - Rigol DS1102D
     - Rigol DS1102E
   - Multimeters:
     - Agilent U1231A
     - Agilent U1232A
     - Agilent U1233A
     - Brymen BM857
     - Digitek DT4000ZC
     - Fluke 187
     - Fluke 189
     - Fluke 287
     - Fluke 289
     - Fluke ScopeMeter 199B
     - MASTECH MAS345
     - Metex ME-31
     - Metex M-3640D
     - PCE PCE-DM32
     - PeakTech 3410
     - PeakTech 4370
     - RadioShack 22-168
     - RadioShack 22-805
     - RadioShack 22-812
     - Tecpel DMM-8060
     - Tecpel DMM-8061
     - TekPower TP4000ZC
     - UNI-T UT61D
     - UNI-T UT61E
     - V&A VA18B
     - Victor 70C
     - Victor 86C
     - Voltcraft VC-820
     - Voltcraft VC-840
   - Sound level meters:
     - Colead SL-5868P
     - Tondaj SL-814
   - Temperature/humidity/CO loggers:
     - Lascar EL-USB and EL-USB CO series (various models)
     - MIC 98581
     - MIC 98583
 * The limitation of max. 64 digital probes has been removed in many places.
 * Added generic DMM protocol parsers usable for various DMMs, over various
   cables and/or transports (e.g. same protocol over serial or USB/HID):
   - Cyrustek ES51922 binary protocol.
   - Fortune Semiconductor FS9721_LP3/FS9721B binary protocol.
   - Fortune Semiconductor FS9922-DMM3/DMM4 binary protocol.
   - Metex 14-byte ASCII protocol.
   - RadioShack 22-812 binary protocol.
 * zeroplus-logic-cube driver:
   - Fix acquisition at some specific samplerates. Only report valid ones.
   - Default to a samplerate of 1MHz.
   - Fix trigger code.
   - Add pre-trigger (capture ratio) setting.
   - Add support for the ZEROPLUS LAP-16128U.
 * fx2lafw driver:
   - Add support for the CWAV USBee DX. This requires the latest version of
     the fx2lafw firmware files.
   - Add support for wide sampling (i.e. 16 probes instead of just 8).
   - Fix multi-stage (software) triggers.
   - Fix various memory leaks, firmware upload timeout bugs, and other issues.
   - Various performance and memory usage improvements in the driver.
 * chronovu-la8 driver:
   - Add support for newer LA8 versions with USB VID/PID 0403:8867.
 * demo driver:
   - Various bugfixes when setting time/sample limits.
 * openbench-logic-sniffer driver:
   - Don't try to scan all available serial ports for OLS devices. Instead,
     the serial port to use now has to be specified by the user.
   - Allow disabling RLE.
 * udev rules file: Add many new entries for additional devices.
 * New output formats:
   - analog: Prints analog values and their unit (e.g. from scopes or DMMs).
 * New input formats:
   - vcd: Value Change Dump format
   - wav: Waveform audio file format (for analog data)
 * 'binary' input format: Add support for a 'samplerate' option.
 * API related changes:
   - There is generated Doxygen API documentation now.
   - The header that frontends should include is: <libsigrok/libsigrok.h>.
     There are other headers which are installed, but those are not meant to
     be included directly by the frontends.
   - There were numerous API changes, additions and removals, too many to list
     here. Please check the source code or Doxygen API documentation for the
     current set of API functions.
 * Serial port code:
    - Various improvements and fixes related to multiple parameters such as
      directions, baudrate, flow control, and others.
    - Add support for more baudrates (e.g. very low ones such as 600/1200)
      that are used in some devices.
    - Add support for setting DTR/RTS.
 * gnuplot files: Add sample files for CWAV USBee DX (for 8/16 bit sampling).
 * Documentation updates:
   - Add a README.devices file which contains various notes for users of
     libsigrok about device- and/or driver-specific issues.
   - Update README, HACKING, and other documents.
   - Updated build dependencies list.
     - The following libs are needed in more recent versions now:
       - glib (required): Now must be >= 2.32.0.
       - libusb-1.0 (optional): Now must be >= 1.0.9.
     - The following new libs were added as (optional) dependencies:
       - libasound / alsa-lib (optional): >= 1.0
       - check (optional, only needed for unit tests): >= 0.9.4
 * Portability:
   - Various compile fixes for Windows, FreeBSD/NetBSD/OpenBSD, and Mac OS X.
   - Simplify/allow/fix cross-compilation of libsigrok.
   - Various bugfixes for 32bit systems.
   - Various endianness fixes.
 * configure:
    - Add a --disable-all-drivers option. This can be overridden by
      additional --enable-<drivername> options to selectively enable only some.
    - Improve autodetection of libraries, and only enable drivers for which
      all required libraries were found.
 * Add a test suite for libsigrok with a few unit tests (the list will grow).

0.1.1 (2012-05-30)
------------------

Note: This release does NOT change the libsigrok API.

 * The 'saleae-logic' driver (which depends on the Saleae firmware), has
   been replaced with the new 'fx2lafw' driver, which uses an open-source
   firmware for Cypress FX2 chips which is also named 'fx2lafw'.
   Details: http://sigrok.org/wiki/Fx2lafw
   This new driver (+ firmware) currently supports the following devices:
     - ARMFLY AX-Pro
     - Braintechnology USB-LPS
     - EE Electronics ESLA100
     - EE Electronics ESLA201A
     - Robomotic MiniLogic
     - Robomotic BugLogic 3
     - Saleae Logic
     - USBee AX
     - USBee SX
     - All Cypress FX2 eval boards with stock Cypress VID/PID, including:
       - Lcsoft Mini Board
       - Braintechnology USB Interface V2.x
   Only acquisition with 8 probes is supported so far. Support for 16 probes
   and support for analog signal acquisition (on devices which have these
   capabilities) will be added later.
 * ASIX SIGMA driver:
   - Add support for the ASIX SIGMA2. This requires the latest version of
     the SIGMA/SIGMA2 firmware files.
     Details: http://sigrok.org/wiki/Firmware
   - Various bugfixes.
 * ZEROPLUS Logic Cube LAP-C (16032): Fix a segfault.
 * udev file: Add entries for Robomotic BugLogic 3, Velleman PCSU1000,
   Ideofy LA-08, ARMFLY AX-Pro, and Braintechnology USB Interface V2.x.
 * The zlib dependency has been removed (no longer needed).
 * Fix compiling with "Homebrew" (Mac OS X).
 * libsigrok now expects firmware files in $prefix/share/sigrok-firmware by
   default (was $prefix/share/libsigrok/firmware before).
 * Fix a Makefile.am bug which caused the generated ChangeLog files being
   accidentally deleted upon 'make distclean'.
 * ChronoVu LA8 input file format: Improve autodetection of the file format.
   We now only accept files of the size 8388613 bytes (all LA8 files have
   exactly this amount of bytes).

0.1.0 (2012-04-17)
------------------

 * Initial release.