TODO

sigrok 0.2

• Support OLS file format input and output (https://github.com/jawi/ols/wiki/OLS-data-file-format).
• CLI: Fix save session, implement load session.
• sigrok_errno:
  • Most functions should return SIGROK_OK or SIGROK_ERR_* (same for LIBSIGROK_OK etc).
  • Most backend functions return status as an integer, which is SIGROK_OK if all went well, or SIGROK_ERR_* and similar if an error occurred.
  • However there is no way to pass any information back as to what went wrong — and this is important for user-friendliness.
  • Perhaps an error code is not enough; maybe something like sigrok_errno(errorcode, "unsupported device") is better.
• Don't initialize and scan for any hardware if the -d <driver> option is used; instead, only initialize the specified device.
• Make sure all combinations of --enable-*/--disable-* options works for configure.
  • There are possible issues if no libusb-device is enabled (e.g. only OLS or only demo).
  • There may be issue if none of the drivers is enabled, print useful error in that case(?)
• make udev optional, only build MSO driver if it's available
• find alternative to udev for windows and macos, fall back to serial probing only as a last resort
• libsigrok.h/libsigrokdecode.h: Only list public API functions.
  • Prefix all public functions with sigrok_ or sigrokdecode_.
• Windows port: Implement anykey.c replacement.
• CLI: Restructure command line option syntax.
• libsigrok, libsigrokdecode: Proper shared libs setup and version numbers to be able to handle API/ABI compatibility issues sanely later.
  • Also, provide correct and complete libsigrok.pc/libsigrokdecode.pc files.
• Fix segfaults in protocol decoders, e.g. sigrok-cli --samples 2050 -a transitioncounter.
• demo driver: Add a mechanism to set/report a samplerate, needed for some output file formats and other stuff.

Future

• Add support for downloading/installing the Python Windows installer.
• Fix/workaround libusb 1.0 Windows port issues:
  • Device renumeration not yet supported (needed for FX2 based LAs)
  • File descriptor / socket based polling not supported in Windows. Workaround (short-term): Use a thread in sigrok.
• Make sure all optional components are really optional in the build system:
  • Only require Python if the users wants protocol decoders, the rest should also build/compile/run fine without Python installed.
• sigrok uses uint64_t as an internal datatype to represent a sample, limiting the number of probes on supported hardware to 64. But high-end logic analyzers can have hundreds of probes. A solution would be to switch to either a roll-our-own byte array type, or use GMP. In any case, the overhead of switching over shouldn't be too bad: the filter code and frontend datafeed callback functions will need to use it, but hardware drivers should have enough with a couple of lightweight wrappers.

Hardware drivers

• Clean up device-specific globals in hardware drivers, to properly permit multiple devices per driver.
  • asix-sigma
  • demo (not relevant)
  • link-mso19
  • openbench-logic-sniffer
  • saleae-logic
  • zeroplus-logic-cube

Contributors needed

• Add output for latex package tikz-timing
• Open-source firmware for the FX2 devices

The Cypress FX2-based devices, such as the Saleae Logic and the USBee SX, use only a minimal vendor-provided firmware. The only thing it really does is set the sample rate and turn on the chip's auto-mode. Nevertheless, the vendors provide the firmware as a binary blob, with no source.

It would be great if sigrok could ship with an own firmware implementation for these devices. Some links:

• • SDCC, the Small Devices C Compiler, is a compiler specifically suited to small MCUs, and has support for the 8051 core in the FX2.
  • fx2lib is an open-source library for writing firmware on the FX2. It has a number of interesting functions, including implementing custom USB vendor commands.
  • GNU Radio's USRP2 board has an FX2 on it, and GNU Radio has extensive custom firmware for it.