From: Uwe Hermann Date: Sat, 27 Oct 2012 20:21:07 +0000 (+0200) Subject: la8: Rename driver.[ch] to protocol.[ch]. X-Git-Tag: dsupstream~623 X-Git-Url: https://sigrok.org/gitweb/?a=commitdiff_plain;h=45e080b60b2526fd9723dd822215294f973bff2a;hp=f3a35908ef0d9fd56ec170d7f1bafff50c3432e2;p=libsigrok.git la8: Rename driver.[ch] to protocol.[ch]. --- diff --git a/hardware/chronovu-la8/Makefile.am b/hardware/chronovu-la8/Makefile.am index db4d6a85..6562e2bf 100644 --- a/hardware/chronovu-la8/Makefile.am +++ b/hardware/chronovu-la8/Makefile.am @@ -25,8 +25,8 @@ noinst_LTLIBRARIES = libsigrokhwchronovula8.la libsigrokhwchronovula8_la_SOURCES = \ api.c \ - driver.c \ - driver.h + protocol.c \ + protocol.h libsigrokhwchronovula8_la_CFLAGS = \ -I$(top_srcdir) diff --git a/hardware/chronovu-la8/api.c b/hardware/chronovu-la8/api.c index 7ed2032a..048c950f 100644 --- a/hardware/chronovu-la8/api.c +++ b/hardware/chronovu-la8/api.c @@ -23,7 +23,7 @@ #include #include "libsigrok.h" #include "libsigrok-internal.h" -#include "driver.h" +#include "protocol.h" SR_PRIV struct sr_dev_driver chronovu_la8_driver_info; static struct sr_dev_driver *di = &chronovu_la8_driver_info; diff --git a/hardware/chronovu-la8/driver.c b/hardware/chronovu-la8/driver.c deleted file mode 100644 index 18483740..00000000 --- a/hardware/chronovu-la8/driver.c +++ /dev/null @@ -1,544 +0,0 @@ -/* - * This file is part of the sigrok project. - * - * Copyright (C) 2011-2012 Uwe Hermann - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA - */ - -#include -#include -#include "libsigrok.h" -#include "libsigrok-internal.h" -#include "driver.h" - -/* Probes are numbered 0-7. */ -SR_PRIV const char *probe_names[NUM_PROBES + 1] = { - "0", - "1", - "2", - "3", - "4", - "5", - "6", - "7", - NULL, -}; - -/* This will be initialized via hw_info_get()/SR_DI_SAMPLERATES. */ -SR_PRIV uint64_t supported_samplerates[255 + 1] = { 0 }; - -/* - * Min: 1 sample per 0.01us -> sample time is 0.084s, samplerate 100MHz - * Max: 1 sample per 2.55us -> sample time is 21.391s, samplerate 392.15kHz - */ -const struct sr_samplerates samplerates = { - .low = 0, - .high = 0, - .step = 0, - .list = supported_samplerates, -}; - -/* Note: Continuous sampling is not supported by the hardware. */ -SR_PRIV const int hwcaps[] = { - SR_HWCAP_LOGIC_ANALYZER, - SR_HWCAP_SAMPLERATE, - SR_HWCAP_LIMIT_MSEC, /* TODO: Not yet implemented. */ - SR_HWCAP_LIMIT_SAMPLES, /* TODO: Not yet implemented. */ - 0, -}; - -SR_PRIV void fill_supported_samplerates_if_needed(void) -{ - int i; - - /* Do nothing if supported_samplerates[] is already filled. */ - if (supported_samplerates[0] != 0) - return; - - /* Fill supported_samplerates[] with the proper values. */ - for (i = 0; i < 255; i++) - supported_samplerates[254 - i] = SR_MHZ(100) / (i + 1); - supported_samplerates[255] = 0; -} - -/** - * Check if the given samplerate is supported by the LA8 hardware. - * - * @param samplerate The samplerate (in Hz) to check. - * @return 1 if the samplerate is supported/valid, 0 otherwise. - */ -SR_PRIV int is_valid_samplerate(uint64_t samplerate) -{ - int i; - - fill_supported_samplerates_if_needed(); - - for (i = 0; i < 255; i++) { - if (supported_samplerates[i] == samplerate) - return 1; - } - - sr_err("Invalid samplerate (%" PRIu64 "Hz).", samplerate); - - return 0; -} - -/** - * Convert a samplerate (in Hz) to the 'divcount' value the LA8 wants. - * - * LA8 hardware: sample period = (divcount + 1) * 10ns. - * Min. value for divcount: 0x00 (10ns sample period, 100MHz samplerate). - * Max. value for divcount: 0xfe (2550ns sample period, 392.15kHz samplerate). - * - * @param samplerate The samplerate in Hz. - * @return The divcount value as needed by the hardware, or 0xff upon errors. - */ -SR_PRIV uint8_t samplerate_to_divcount(uint64_t samplerate) -{ - if (samplerate == 0) { - sr_err("%s: samplerate was 0.", __func__); - return 0xff; - } - - if (!is_valid_samplerate(samplerate)) { - sr_err("%s: Can't get divcount, samplerate invalid.", __func__); - return 0xff; - } - - return (SR_MHZ(100) / samplerate) - 1; -} - -/** - * Write data of a certain length to the LA8's FTDI device. - * - * @param devc The struct containing private per-device-instance data. Must not - * be NULL. devc->ftdic must not be NULL either. - * @param buf The buffer containing the data to write. Must not be NULL. - * @param size The number of bytes to write. Must be >= 0. - * @return The number of bytes written, or a negative value upon errors. - */ -SR_PRIV int la8_write(struct dev_context *devc, uint8_t *buf, int size) -{ - int bytes_written; - - /* Note: Caller checked that devc and devc->ftdic != NULL. */ - - if (!buf) { - sr_err("%s: buf was NULL.", __func__); - return SR_ERR_ARG; - } - - if (size < 0) { - sr_err("%s: size was < 0.", __func__); - return SR_ERR_ARG; - } - - bytes_written = ftdi_write_data(devc->ftdic, buf, size); - - if (bytes_written < 0) { - sr_err("%s: ftdi_write_data: (%d) %s.", __func__, - bytes_written, ftdi_get_error_string(devc->ftdic)); - (void) la8_close_usb_reset_sequencer(devc); /* Ignore errors. */ - } else if (bytes_written != size) { - sr_err("%s: bytes to write: %d, bytes written: %d.", - __func__, size, bytes_written); - (void) la8_close_usb_reset_sequencer(devc); /* Ignore errors. */ - } - - return bytes_written; -} - -/** - * Read a certain amount of bytes from the LA8's FTDI device. - * - * @param devc The struct containing private per-device-instance data. Must not - * be NULL. devc->ftdic must not be NULL either. - * @param buf The buffer where the received data will be stored. Must not - * be NULL. - * @param size The number of bytes to read. Must be >= 1. - * @return The number of bytes read, or a negative value upon errors. - */ -SR_PRIV int la8_read(struct dev_context *devc, uint8_t *buf, int size) -{ - int bytes_read; - - /* Note: Caller checked that devc and devc->ftdic != NULL. */ - - if (!buf) { - sr_err("%s: buf was NULL.", __func__); - return SR_ERR_ARG; - } - - if (size <= 0) { - sr_err("%s: size was <= 0.", __func__); - return SR_ERR_ARG; - } - - bytes_read = ftdi_read_data(devc->ftdic, buf, size); - - if (bytes_read < 0) { - sr_err("%s: ftdi_read_data: (%d) %s.", __func__, - bytes_read, ftdi_get_error_string(devc->ftdic)); - } else if (bytes_read != size) { - // sr_err("%s: Bytes to read: %d, bytes read: %d.", - // __func__, size, bytes_read); - } - - return bytes_read; -} - -SR_PRIV int la8_close(struct dev_context *devc) -{ - int ret; - - if (!devc) { - sr_err("%s: devc was NULL.", __func__); - return SR_ERR_ARG; - } - - if (!devc->ftdic) { - sr_err("%s: devc->ftdic was NULL.", __func__); - return SR_ERR_ARG; - } - - if ((ret = ftdi_usb_close(devc->ftdic)) < 0) { - sr_err("%s: ftdi_usb_close: (%d) %s.", - __func__, ret, ftdi_get_error_string(devc->ftdic)); - } - - return ret; -} - -/** - * Close the ChronoVu LA8 USB port and reset the LA8 sequencer logic. - * - * @param devc The struct containing private per-device-instance data. - * @return SR_OK upon success, SR_ERR_ARG upon invalid arguments. - */ -SR_PRIV int la8_close_usb_reset_sequencer(struct dev_context *devc) -{ - /* Magic sequence of bytes for resetting the LA8 sequencer logic. */ - uint8_t buf[8] = {0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01}; - int ret; - - if (!devc) { - sr_err("%s: devc was NULL.", __func__); - return SR_ERR_ARG; - } - - if (!devc->ftdic) { - sr_err("%s: devc->ftdic was NULL.", __func__); - return SR_ERR_ARG; - } - - if (devc->ftdic->usb_dev) { - /* Reset the LA8 sequencer logic, then wait 100ms. */ - sr_dbg("Resetting sequencer logic."); - (void) la8_write(devc, buf, 8); /* Ignore errors. */ - g_usleep(100 * 1000); - - /* Purge FTDI buffers, then reset and close the FTDI device. */ - sr_dbg("Purging buffers, resetting+closing FTDI device."); - - /* Log errors, but ignore them (i.e., don't abort). */ - if ((ret = ftdi_usb_purge_buffers(devc->ftdic)) < 0) - sr_err("%s: ftdi_usb_purge_buffers: (%d) %s.", - __func__, ret, ftdi_get_error_string(devc->ftdic)); - if ((ret = ftdi_usb_reset(devc->ftdic)) < 0) - sr_err("%s: ftdi_usb_reset: (%d) %s.", __func__, - ret, ftdi_get_error_string(devc->ftdic)); - if ((ret = ftdi_usb_close(devc->ftdic)) < 0) - sr_err("%s: ftdi_usb_close: (%d) %s.", __func__, - ret, ftdi_get_error_string(devc->ftdic)); - } - - /* Close USB device, deinitialize and free the FTDI context. */ - ftdi_free(devc->ftdic); /* Returns void. */ - devc->ftdic = NULL; - - return SR_OK; -} - -/** - * Reset the ChronoVu LA8. - * - * The LA8 must be reset after a failed read/write operation or upon timeouts. - * - * @param devc The struct containing private per-device-instance data. - * @return SR_OK upon success, SR_ERR upon failure. - */ -SR_PRIV int la8_reset(struct dev_context *devc) -{ - uint8_t buf[BS]; - time_t done, now; - int bytes_read; - - if (!devc) { - sr_err("%s: devc was NULL.", __func__); - return SR_ERR_ARG; - } - - if (!devc->ftdic) { - sr_err("%s: devc->ftdic was NULL.", __func__); - return SR_ERR_ARG; - } - - sr_dbg("Resetting the device."); - - /* - * Purge pending read data from the FTDI hardware FIFO until - * no more data is left, or a timeout occurs (after 20s). - */ - done = 20 + time(NULL); - do { - /* TODO: Ignore errors? Check for < 0 at least! */ - bytes_read = la8_read(devc, (uint8_t *)&buf, BS); - now = time(NULL); - } while ((done > now) && (bytes_read > 0)); - - /* Reset the LA8 sequencer logic and close the USB port. */ - (void) la8_close_usb_reset_sequencer(devc); /* Ignore errors. */ - - sr_dbg("Device reset finished."); - - return SR_OK; -} - -SR_PRIV int configure_probes(const struct sr_dev_inst *sdi) -{ - struct dev_context *devc; - const struct sr_probe *probe; - const GSList *l; - uint8_t probe_bit; - char *tc; - - devc = sdi->priv; - devc->trigger_pattern = 0; - devc->trigger_mask = 0; /* Default to "don't care" for all probes. */ - - for (l = sdi->probes; l; l = l->next) { - probe = (struct sr_probe *)l->data; - - if (!probe) { - sr_err("%s: probe was NULL.", __func__); - return SR_ERR; - } - - /* Skip disabled probes. */ - if (!probe->enabled) - continue; - - /* Skip (enabled) probes with no configured trigger. */ - if (!probe->trigger) - continue; - - /* Note: Must only be run if probe->trigger != NULL. */ - if (probe->index < 0 || probe->index > 7) { - sr_err("%s: Invalid probe index %d, must be " - "between 0 and 7.", __func__, probe->index); - return SR_ERR; - } - - probe_bit = (1 << (probe->index)); - - /* Configure the probe's trigger mask and trigger pattern. */ - for (tc = probe->trigger; tc && *tc; tc++) { - devc->trigger_mask |= probe_bit; - - /* Sanity check, LA8 only supports low/high trigger. */ - if (*tc != '0' && *tc != '1') { - sr_err("%s: Invalid trigger '%c', only " - "'0'/'1' supported.", __func__, *tc); - return SR_ERR; - } - - if (*tc == '1') - devc->trigger_pattern |= probe_bit; - } - } - - sr_dbg("Trigger mask = 0x%x, trigger pattern = 0x%x.", - devc->trigger_mask, devc->trigger_pattern); - - return SR_OK; -} - -SR_PRIV int set_samplerate(const struct sr_dev_inst *sdi, uint64_t samplerate) -{ - struct dev_context *devc; - - /* Note: Caller checked that sdi and sdi->priv != NULL. */ - - devc = sdi->priv; - - sr_spew("Trying to set samplerate to %" PRIu64 "Hz.", samplerate); - - fill_supported_samplerates_if_needed(); - - /* Check if this is a samplerate supported by the hardware. */ - if (!is_valid_samplerate(samplerate)) - return SR_ERR; - - /* Set the new samplerate. */ - devc->cur_samplerate = samplerate; - - sr_dbg("Samplerate set to %" PRIu64 "Hz.", devc->cur_samplerate); - - return SR_OK; -} - -/** - * Get a block of data from the LA8. - * - * @param devc The struct containing private per-device-instance data. Must not - * be NULL. devc->ftdic must not be NULL either. - * @return SR_OK upon success, or SR_ERR upon errors. - */ -SR_PRIV int la8_read_block(struct dev_context *devc) -{ - int i, byte_offset, m, mi, p, index, bytes_read; - time_t now; - - /* Note: Caller checked that devc and devc->ftdic != NULL. */ - - sr_spew("Reading block %d.", devc->block_counter); - - bytes_read = la8_read(devc, devc->mangled_buf, BS); - - /* If first block read got 0 bytes, retry until success or timeout. */ - if ((bytes_read == 0) && (devc->block_counter == 0)) { - do { - sr_spew("Reading block 0 (again)."); - bytes_read = la8_read(devc, devc->mangled_buf, BS); - /* TODO: How to handle read errors here? */ - now = time(NULL); - } while ((devc->done > now) && (bytes_read == 0)); - } - - /* Check if block read was successful or a timeout occured. */ - if (bytes_read != BS) { - sr_err("Trigger timed out. Bytes read: %d.", bytes_read); - (void) la8_reset(devc); /* Ignore errors. */ - return SR_ERR; - } - - /* De-mangle the data. */ - sr_spew("Demangling block %d.", devc->block_counter); - byte_offset = devc->block_counter * BS; - m = byte_offset / (1024 * 1024); - mi = m * (1024 * 1024); - for (i = 0; i < BS; i++) { - p = i & (1 << 0); - index = m * 2 + (((byte_offset + i) - mi) / 2) * 16; - index += (devc->divcount == 0) ? p : (1 - p); - devc->final_buf[index] = devc->mangled_buf[i]; - } - - return SR_OK; -} - -SR_PRIV void send_block_to_session_bus(struct dev_context *devc, int block) -{ - int i; - uint8_t sample, expected_sample; - struct sr_datafeed_packet packet; - struct sr_datafeed_logic logic; - int trigger_point; /* Relative trigger point (in this block). */ - - /* Note: No sanity checks on devc/block, caller is responsible. */ - - /* Check if we can find the trigger condition in this block. */ - trigger_point = -1; - expected_sample = devc->trigger_pattern & devc->trigger_mask; - for (i = 0; i < BS; i++) { - /* Don't continue if the trigger was found previously. */ - if (devc->trigger_found) - break; - - /* - * Also, don't continue if triggers are "don't care", i.e. if - * no trigger conditions were specified by the user. In that - * case we don't want to send an SR_DF_TRIGGER packet at all. - */ - if (devc->trigger_mask == 0x00) - break; - - sample = *(devc->final_buf + (block * BS) + i); - - if ((sample & devc->trigger_mask) == expected_sample) { - trigger_point = i; - devc->trigger_found = 1; - break; - } - } - - /* If no trigger was found, send one SR_DF_LOGIC packet. */ - if (trigger_point == -1) { - /* Send an SR_DF_LOGIC packet to the session bus. */ - sr_spew("Sending SR_DF_LOGIC packet (%d bytes) for " - "block %d.", BS, block); - packet.type = SR_DF_LOGIC; - packet.payload = &logic; - logic.length = BS; - logic.unitsize = 1; - logic.data = devc->final_buf + (block * BS); - sr_session_send(devc->session_dev_id, &packet); - return; - } - - /* - * We found the trigger, so some special handling is needed. We have - * to send an SR_DF_LOGIC packet with the samples before the trigger - * (if any), then the SD_DF_TRIGGER packet itself, then another - * SR_DF_LOGIC packet with the samples after the trigger (if any). - */ - - /* TODO: Send SR_DF_TRIGGER packet before or after the actual sample? */ - - /* If at least one sample is located before the trigger... */ - if (trigger_point > 0) { - /* Send pre-trigger SR_DF_LOGIC packet to the session bus. */ - sr_spew("Sending pre-trigger SR_DF_LOGIC packet, " - "start = %d, length = %d.", block * BS, trigger_point); - packet.type = SR_DF_LOGIC; - packet.payload = &logic; - logic.length = trigger_point; - logic.unitsize = 1; - logic.data = devc->final_buf + (block * BS); - sr_session_send(devc->session_dev_id, &packet); - } - - /* Send the SR_DF_TRIGGER packet to the session bus. */ - sr_spew("Sending SR_DF_TRIGGER packet, sample = %d.", - (block * BS) + trigger_point); - packet.type = SR_DF_TRIGGER; - packet.payload = NULL; - sr_session_send(devc->session_dev_id, &packet); - - /* If at least one sample is located after the trigger... */ - if (trigger_point < (BS - 1)) { - /* Send post-trigger SR_DF_LOGIC packet to the session bus. */ - sr_spew("Sending post-trigger SR_DF_LOGIC packet, " - "start = %d, length = %d.", - (block * BS) + trigger_point, BS - trigger_point); - packet.type = SR_DF_LOGIC; - packet.payload = &logic; - logic.length = BS - trigger_point; - logic.unitsize = 1; - logic.data = devc->final_buf + (block * BS) + trigger_point; - sr_session_send(devc->session_dev_id, &packet); - } -} diff --git a/hardware/chronovu-la8/driver.h b/hardware/chronovu-la8/driver.h deleted file mode 100644 index 7eeffd6d..00000000 --- a/hardware/chronovu-la8/driver.h +++ /dev/null @@ -1,132 +0,0 @@ -/* - * This file is part of the sigrok project. - * - * Copyright (C) 2011-2012 Uwe Hermann - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA - */ - -#ifndef LIBSIGROK_HARDWARE_CHRONOVU_LA8_DRIVER_H -#define LIBSIGROK_HARDWARE_CHRONOVU_LA8_DRIVER_H - -#include -#include -#include -#include "libsigrok.h" -#include "libsigrok-internal.h" - -/* Message logging helpers with driver-specific prefix string. */ -#define DRIVER_LOG_DOMAIN "la8: " -#define sr_log(l, s, args...) sr_log(l, DRIVER_LOG_DOMAIN s, ## args) -#define sr_spew(s, args...) sr_spew(DRIVER_LOG_DOMAIN s, ## args) -#define sr_dbg(s, args...) sr_dbg(DRIVER_LOG_DOMAIN s, ## args) -#define sr_info(s, args...) sr_info(DRIVER_LOG_DOMAIN s, ## args) -#define sr_warn(s, args...) sr_warn(DRIVER_LOG_DOMAIN s, ## args) -#define sr_err(s, args...) sr_err(DRIVER_LOG_DOMAIN s, ## args) - -#define USB_VENDOR_ID 0x0403 -#define USB_DESCRIPTION "ChronoVu LA8" -#define USB_VENDOR_NAME "ChronoVu" -#define USB_MODEL_NAME "LA8" -#define USB_MODEL_VERSION "" - -#define NUM_PROBES 8 -#define TRIGGER_TYPES "01" -#define SDRAM_SIZE (8 * 1024 * 1024) -#define MIN_NUM_SAMPLES 1 - -#define BS 4096 /* Block size */ -#define NUM_BLOCKS 2048 /* Number of blocks */ - -/* Private, per-device-instance driver context. */ -struct dev_context { - /** FTDI device context (used by libftdi). */ - struct ftdi_context *ftdic; - - /** The currently configured samplerate of the device. */ - uint64_t cur_samplerate; - - /** The current sampling limit (in ms). */ - uint64_t limit_msec; - - /** The current sampling limit (in number of samples). */ - uint64_t limit_samples; - - /** TODO */ - void *session_dev_id; - - /** - * A buffer containing some (mangled) samples from the device. - * Format: Pretty mangled-up (due to hardware reasons), see code. - */ - uint8_t mangled_buf[BS]; - - /** - * An 8MB buffer where we'll store the de-mangled samples. - * Format: Each sample is 1 byte, MSB is channel 7, LSB is channel 0. - */ - uint8_t *final_buf; - - /** - * Trigger pattern (MSB = channel 7, LSB = channel 0). - * A 1 bit matches a high signal, 0 matches a low signal on a probe. - * Only low/high triggers (but not e.g. rising/falling) are supported. - */ - uint8_t trigger_pattern; - - /** - * Trigger mask (MSB = channel 7, LSB = channel 0). - * A 1 bit means "must match trigger_pattern", 0 means "don't care". - */ - uint8_t trigger_mask; - - /** Time (in seconds) before the trigger times out. */ - uint64_t trigger_timeout; - - /** Tells us whether an SR_DF_TRIGGER packet was already sent. */ - int trigger_found; - - /** TODO */ - time_t done; - - /** Counter/index for the data block to be read. */ - int block_counter; - - /** The divcount value (determines the sample period) for the LA8. */ - uint8_t divcount; - - /** This ChronoVu LA8's USB PID (multiple versions exist). */ - uint16_t usb_pid; -}; - -/* driver.c */ -extern SR_PRIV uint64_t supported_samplerates[]; -extern SR_PRIV const int hwcaps[]; -extern SR_PRIV const char *probe_names[]; -extern const struct sr_samplerates samplerates; -SR_PRIV void fill_supported_samplerates_if_needed(void); -SR_PRIV int is_valid_samplerate(uint64_t samplerate); -SR_PRIV uint8_t samplerate_to_divcount(uint64_t samplerate); -SR_PRIV int la8_write(struct dev_context *devc, uint8_t *buf, int size); -SR_PRIV int la8_read(struct dev_context *devc, uint8_t *buf, int size); -SR_PRIV int la8_close(struct dev_context *devc); -SR_PRIV int la8_close_usb_reset_sequencer(struct dev_context *devc); -SR_PRIV int la8_reset(struct dev_context *devc); -SR_PRIV int configure_probes(const struct sr_dev_inst *sdi); -SR_PRIV int set_samplerate(const struct sr_dev_inst *sdi, uint64_t samplerate); -SR_PRIV int la8_read_block(struct dev_context *devc); -SR_PRIV void send_block_to_session_bus(struct dev_context *devc, int block); - -#endif diff --git a/hardware/chronovu-la8/protocol.c b/hardware/chronovu-la8/protocol.c new file mode 100644 index 00000000..9b25cd7f --- /dev/null +++ b/hardware/chronovu-la8/protocol.c @@ -0,0 +1,544 @@ +/* + * This file is part of the sigrok project. + * + * Copyright (C) 2011-2012 Uwe Hermann + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#include +#include +#include "libsigrok.h" +#include "libsigrok-internal.h" +#include "protocol.h" + +/* Probes are numbered 0-7. */ +SR_PRIV const char *probe_names[NUM_PROBES + 1] = { + "0", + "1", + "2", + "3", + "4", + "5", + "6", + "7", + NULL, +}; + +/* This will be initialized via hw_info_get()/SR_DI_SAMPLERATES. */ +SR_PRIV uint64_t supported_samplerates[255 + 1] = { 0 }; + +/* + * Min: 1 sample per 0.01us -> sample time is 0.084s, samplerate 100MHz + * Max: 1 sample per 2.55us -> sample time is 21.391s, samplerate 392.15kHz + */ +const struct sr_samplerates samplerates = { + .low = 0, + .high = 0, + .step = 0, + .list = supported_samplerates, +}; + +/* Note: Continuous sampling is not supported by the hardware. */ +SR_PRIV const int hwcaps[] = { + SR_HWCAP_LOGIC_ANALYZER, + SR_HWCAP_SAMPLERATE, + SR_HWCAP_LIMIT_MSEC, /* TODO: Not yet implemented. */ + SR_HWCAP_LIMIT_SAMPLES, /* TODO: Not yet implemented. */ + 0, +}; + +SR_PRIV void fill_supported_samplerates_if_needed(void) +{ + int i; + + /* Do nothing if supported_samplerates[] is already filled. */ + if (supported_samplerates[0] != 0) + return; + + /* Fill supported_samplerates[] with the proper values. */ + for (i = 0; i < 255; i++) + supported_samplerates[254 - i] = SR_MHZ(100) / (i + 1); + supported_samplerates[255] = 0; +} + +/** + * Check if the given samplerate is supported by the LA8 hardware. + * + * @param samplerate The samplerate (in Hz) to check. + * @return 1 if the samplerate is supported/valid, 0 otherwise. + */ +SR_PRIV int is_valid_samplerate(uint64_t samplerate) +{ + int i; + + fill_supported_samplerates_if_needed(); + + for (i = 0; i < 255; i++) { + if (supported_samplerates[i] == samplerate) + return 1; + } + + sr_err("Invalid samplerate (%" PRIu64 "Hz).", samplerate); + + return 0; +} + +/** + * Convert a samplerate (in Hz) to the 'divcount' value the LA8 wants. + * + * LA8 hardware: sample period = (divcount + 1) * 10ns. + * Min. value for divcount: 0x00 (10ns sample period, 100MHz samplerate). + * Max. value for divcount: 0xfe (2550ns sample period, 392.15kHz samplerate). + * + * @param samplerate The samplerate in Hz. + * @return The divcount value as needed by the hardware, or 0xff upon errors. + */ +SR_PRIV uint8_t samplerate_to_divcount(uint64_t samplerate) +{ + if (samplerate == 0) { + sr_err("%s: samplerate was 0.", __func__); + return 0xff; + } + + if (!is_valid_samplerate(samplerate)) { + sr_err("%s: Can't get divcount, samplerate invalid.", __func__); + return 0xff; + } + + return (SR_MHZ(100) / samplerate) - 1; +} + +/** + * Write data of a certain length to the LA8's FTDI device. + * + * @param devc The struct containing private per-device-instance data. Must not + * be NULL. devc->ftdic must not be NULL either. + * @param buf The buffer containing the data to write. Must not be NULL. + * @param size The number of bytes to write. Must be >= 0. + * @return The number of bytes written, or a negative value upon errors. + */ +SR_PRIV int la8_write(struct dev_context *devc, uint8_t *buf, int size) +{ + int bytes_written; + + /* Note: Caller checked that devc and devc->ftdic != NULL. */ + + if (!buf) { + sr_err("%s: buf was NULL.", __func__); + return SR_ERR_ARG; + } + + if (size < 0) { + sr_err("%s: size was < 0.", __func__); + return SR_ERR_ARG; + } + + bytes_written = ftdi_write_data(devc->ftdic, buf, size); + + if (bytes_written < 0) { + sr_err("%s: ftdi_write_data: (%d) %s.", __func__, + bytes_written, ftdi_get_error_string(devc->ftdic)); + (void) la8_close_usb_reset_sequencer(devc); /* Ignore errors. */ + } else if (bytes_written != size) { + sr_err("%s: bytes to write: %d, bytes written: %d.", + __func__, size, bytes_written); + (void) la8_close_usb_reset_sequencer(devc); /* Ignore errors. */ + } + + return bytes_written; +} + +/** + * Read a certain amount of bytes from the LA8's FTDI device. + * + * @param devc The struct containing private per-device-instance data. Must not + * be NULL. devc->ftdic must not be NULL either. + * @param buf The buffer where the received data will be stored. Must not + * be NULL. + * @param size The number of bytes to read. Must be >= 1. + * @return The number of bytes read, or a negative value upon errors. + */ +SR_PRIV int la8_read(struct dev_context *devc, uint8_t *buf, int size) +{ + int bytes_read; + + /* Note: Caller checked that devc and devc->ftdic != NULL. */ + + if (!buf) { + sr_err("%s: buf was NULL.", __func__); + return SR_ERR_ARG; + } + + if (size <= 0) { + sr_err("%s: size was <= 0.", __func__); + return SR_ERR_ARG; + } + + bytes_read = ftdi_read_data(devc->ftdic, buf, size); + + if (bytes_read < 0) { + sr_err("%s: ftdi_read_data: (%d) %s.", __func__, + bytes_read, ftdi_get_error_string(devc->ftdic)); + } else if (bytes_read != size) { + // sr_err("%s: Bytes to read: %d, bytes read: %d.", + // __func__, size, bytes_read); + } + + return bytes_read; +} + +SR_PRIV int la8_close(struct dev_context *devc) +{ + int ret; + + if (!devc) { + sr_err("%s: devc was NULL.", __func__); + return SR_ERR_ARG; + } + + if (!devc->ftdic) { + sr_err("%s: devc->ftdic was NULL.", __func__); + return SR_ERR_ARG; + } + + if ((ret = ftdi_usb_close(devc->ftdic)) < 0) { + sr_err("%s: ftdi_usb_close: (%d) %s.", + __func__, ret, ftdi_get_error_string(devc->ftdic)); + } + + return ret; +} + +/** + * Close the ChronoVu LA8 USB port and reset the LA8 sequencer logic. + * + * @param devc The struct containing private per-device-instance data. + * @return SR_OK upon success, SR_ERR_ARG upon invalid arguments. + */ +SR_PRIV int la8_close_usb_reset_sequencer(struct dev_context *devc) +{ + /* Magic sequence of bytes for resetting the LA8 sequencer logic. */ + uint8_t buf[8] = {0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01}; + int ret; + + if (!devc) { + sr_err("%s: devc was NULL.", __func__); + return SR_ERR_ARG; + } + + if (!devc->ftdic) { + sr_err("%s: devc->ftdic was NULL.", __func__); + return SR_ERR_ARG; + } + + if (devc->ftdic->usb_dev) { + /* Reset the LA8 sequencer logic, then wait 100ms. */ + sr_dbg("Resetting sequencer logic."); + (void) la8_write(devc, buf, 8); /* Ignore errors. */ + g_usleep(100 * 1000); + + /* Purge FTDI buffers, then reset and close the FTDI device. */ + sr_dbg("Purging buffers, resetting+closing FTDI device."); + + /* Log errors, but ignore them (i.e., don't abort). */ + if ((ret = ftdi_usb_purge_buffers(devc->ftdic)) < 0) + sr_err("%s: ftdi_usb_purge_buffers: (%d) %s.", + __func__, ret, ftdi_get_error_string(devc->ftdic)); + if ((ret = ftdi_usb_reset(devc->ftdic)) < 0) + sr_err("%s: ftdi_usb_reset: (%d) %s.", __func__, + ret, ftdi_get_error_string(devc->ftdic)); + if ((ret = ftdi_usb_close(devc->ftdic)) < 0) + sr_err("%s: ftdi_usb_close: (%d) %s.", __func__, + ret, ftdi_get_error_string(devc->ftdic)); + } + + /* Close USB device, deinitialize and free the FTDI context. */ + ftdi_free(devc->ftdic); /* Returns void. */ + devc->ftdic = NULL; + + return SR_OK; +} + +/** + * Reset the ChronoVu LA8. + * + * The LA8 must be reset after a failed read/write operation or upon timeouts. + * + * @param devc The struct containing private per-device-instance data. + * @return SR_OK upon success, SR_ERR upon failure. + */ +SR_PRIV int la8_reset(struct dev_context *devc) +{ + uint8_t buf[BS]; + time_t done, now; + int bytes_read; + + if (!devc) { + sr_err("%s: devc was NULL.", __func__); + return SR_ERR_ARG; + } + + if (!devc->ftdic) { + sr_err("%s: devc->ftdic was NULL.", __func__); + return SR_ERR_ARG; + } + + sr_dbg("Resetting the device."); + + /* + * Purge pending read data from the FTDI hardware FIFO until + * no more data is left, or a timeout occurs (after 20s). + */ + done = 20 + time(NULL); + do { + /* TODO: Ignore errors? Check for < 0 at least! */ + bytes_read = la8_read(devc, (uint8_t *)&buf, BS); + now = time(NULL); + } while ((done > now) && (bytes_read > 0)); + + /* Reset the LA8 sequencer logic and close the USB port. */ + (void) la8_close_usb_reset_sequencer(devc); /* Ignore errors. */ + + sr_dbg("Device reset finished."); + + return SR_OK; +} + +SR_PRIV int configure_probes(const struct sr_dev_inst *sdi) +{ + struct dev_context *devc; + const struct sr_probe *probe; + const GSList *l; + uint8_t probe_bit; + char *tc; + + devc = sdi->priv; + devc->trigger_pattern = 0; + devc->trigger_mask = 0; /* Default to "don't care" for all probes. */ + + for (l = sdi->probes; l; l = l->next) { + probe = (struct sr_probe *)l->data; + + if (!probe) { + sr_err("%s: probe was NULL.", __func__); + return SR_ERR; + } + + /* Skip disabled probes. */ + if (!probe->enabled) + continue; + + /* Skip (enabled) probes with no configured trigger. */ + if (!probe->trigger) + continue; + + /* Note: Must only be run if probe->trigger != NULL. */ + if (probe->index < 0 || probe->index > 7) { + sr_err("%s: Invalid probe index %d, must be " + "between 0 and 7.", __func__, probe->index); + return SR_ERR; + } + + probe_bit = (1 << (probe->index)); + + /* Configure the probe's trigger mask and trigger pattern. */ + for (tc = probe->trigger; tc && *tc; tc++) { + devc->trigger_mask |= probe_bit; + + /* Sanity check, LA8 only supports low/high trigger. */ + if (*tc != '0' && *tc != '1') { + sr_err("%s: Invalid trigger '%c', only " + "'0'/'1' supported.", __func__, *tc); + return SR_ERR; + } + + if (*tc == '1') + devc->trigger_pattern |= probe_bit; + } + } + + sr_dbg("Trigger mask = 0x%x, trigger pattern = 0x%x.", + devc->trigger_mask, devc->trigger_pattern); + + return SR_OK; +} + +SR_PRIV int set_samplerate(const struct sr_dev_inst *sdi, uint64_t samplerate) +{ + struct dev_context *devc; + + /* Note: Caller checked that sdi and sdi->priv != NULL. */ + + devc = sdi->priv; + + sr_spew("Trying to set samplerate to %" PRIu64 "Hz.", samplerate); + + fill_supported_samplerates_if_needed(); + + /* Check if this is a samplerate supported by the hardware. */ + if (!is_valid_samplerate(samplerate)) + return SR_ERR; + + /* Set the new samplerate. */ + devc->cur_samplerate = samplerate; + + sr_dbg("Samplerate set to %" PRIu64 "Hz.", devc->cur_samplerate); + + return SR_OK; +} + +/** + * Get a block of data from the LA8. + * + * @param devc The struct containing private per-device-instance data. Must not + * be NULL. devc->ftdic must not be NULL either. + * @return SR_OK upon success, or SR_ERR upon errors. + */ +SR_PRIV int la8_read_block(struct dev_context *devc) +{ + int i, byte_offset, m, mi, p, index, bytes_read; + time_t now; + + /* Note: Caller checked that devc and devc->ftdic != NULL. */ + + sr_spew("Reading block %d.", devc->block_counter); + + bytes_read = la8_read(devc, devc->mangled_buf, BS); + + /* If first block read got 0 bytes, retry until success or timeout. */ + if ((bytes_read == 0) && (devc->block_counter == 0)) { + do { + sr_spew("Reading block 0 (again)."); + bytes_read = la8_read(devc, devc->mangled_buf, BS); + /* TODO: How to handle read errors here? */ + now = time(NULL); + } while ((devc->done > now) && (bytes_read == 0)); + } + + /* Check if block read was successful or a timeout occured. */ + if (bytes_read != BS) { + sr_err("Trigger timed out. Bytes read: %d.", bytes_read); + (void) la8_reset(devc); /* Ignore errors. */ + return SR_ERR; + } + + /* De-mangle the data. */ + sr_spew("Demangling block %d.", devc->block_counter); + byte_offset = devc->block_counter * BS; + m = byte_offset / (1024 * 1024); + mi = m * (1024 * 1024); + for (i = 0; i < BS; i++) { + p = i & (1 << 0); + index = m * 2 + (((byte_offset + i) - mi) / 2) * 16; + index += (devc->divcount == 0) ? p : (1 - p); + devc->final_buf[index] = devc->mangled_buf[i]; + } + + return SR_OK; +} + +SR_PRIV void send_block_to_session_bus(struct dev_context *devc, int block) +{ + int i; + uint8_t sample, expected_sample; + struct sr_datafeed_packet packet; + struct sr_datafeed_logic logic; + int trigger_point; /* Relative trigger point (in this block). */ + + /* Note: No sanity checks on devc/block, caller is responsible. */ + + /* Check if we can find the trigger condition in this block. */ + trigger_point = -1; + expected_sample = devc->trigger_pattern & devc->trigger_mask; + for (i = 0; i < BS; i++) { + /* Don't continue if the trigger was found previously. */ + if (devc->trigger_found) + break; + + /* + * Also, don't continue if triggers are "don't care", i.e. if + * no trigger conditions were specified by the user. In that + * case we don't want to send an SR_DF_TRIGGER packet at all. + */ + if (devc->trigger_mask == 0x00) + break; + + sample = *(devc->final_buf + (block * BS) + i); + + if ((sample & devc->trigger_mask) == expected_sample) { + trigger_point = i; + devc->trigger_found = 1; + break; + } + } + + /* If no trigger was found, send one SR_DF_LOGIC packet. */ + if (trigger_point == -1) { + /* Send an SR_DF_LOGIC packet to the session bus. */ + sr_spew("Sending SR_DF_LOGIC packet (%d bytes) for " + "block %d.", BS, block); + packet.type = SR_DF_LOGIC; + packet.payload = &logic; + logic.length = BS; + logic.unitsize = 1; + logic.data = devc->final_buf + (block * BS); + sr_session_send(devc->session_dev_id, &packet); + return; + } + + /* + * We found the trigger, so some special handling is needed. We have + * to send an SR_DF_LOGIC packet with the samples before the trigger + * (if any), then the SD_DF_TRIGGER packet itself, then another + * SR_DF_LOGIC packet with the samples after the trigger (if any). + */ + + /* TODO: Send SR_DF_TRIGGER packet before or after the actual sample? */ + + /* If at least one sample is located before the trigger... */ + if (trigger_point > 0) { + /* Send pre-trigger SR_DF_LOGIC packet to the session bus. */ + sr_spew("Sending pre-trigger SR_DF_LOGIC packet, " + "start = %d, length = %d.", block * BS, trigger_point); + packet.type = SR_DF_LOGIC; + packet.payload = &logic; + logic.length = trigger_point; + logic.unitsize = 1; + logic.data = devc->final_buf + (block * BS); + sr_session_send(devc->session_dev_id, &packet); + } + + /* Send the SR_DF_TRIGGER packet to the session bus. */ + sr_spew("Sending SR_DF_TRIGGER packet, sample = %d.", + (block * BS) + trigger_point); + packet.type = SR_DF_TRIGGER; + packet.payload = NULL; + sr_session_send(devc->session_dev_id, &packet); + + /* If at least one sample is located after the trigger... */ + if (trigger_point < (BS - 1)) { + /* Send post-trigger SR_DF_LOGIC packet to the session bus. */ + sr_spew("Sending post-trigger SR_DF_LOGIC packet, " + "start = %d, length = %d.", + (block * BS) + trigger_point, BS - trigger_point); + packet.type = SR_DF_LOGIC; + packet.payload = &logic; + logic.length = BS - trigger_point; + logic.unitsize = 1; + logic.data = devc->final_buf + (block * BS) + trigger_point; + sr_session_send(devc->session_dev_id, &packet); + } +} diff --git a/hardware/chronovu-la8/protocol.h b/hardware/chronovu-la8/protocol.h new file mode 100644 index 00000000..b28a8166 --- /dev/null +++ b/hardware/chronovu-la8/protocol.h @@ -0,0 +1,132 @@ +/* + * This file is part of the sigrok project. + * + * Copyright (C) 2011-2012 Uwe Hermann + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#ifndef LIBSIGROK_HARDWARE_CHRONOVU_LA8_PROTOCOL_H +#define LIBSIGROK_HARDWARE_CHRONOVU_LA8_PROTOCOL_H + +#include +#include +#include +#include "libsigrok.h" +#include "libsigrok-internal.h" + +/* Message logging helpers with driver-specific prefix string. */ +#define DRIVER_LOG_DOMAIN "la8: " +#define sr_log(l, s, args...) sr_log(l, DRIVER_LOG_DOMAIN s, ## args) +#define sr_spew(s, args...) sr_spew(DRIVER_LOG_DOMAIN s, ## args) +#define sr_dbg(s, args...) sr_dbg(DRIVER_LOG_DOMAIN s, ## args) +#define sr_info(s, args...) sr_info(DRIVER_LOG_DOMAIN s, ## args) +#define sr_warn(s, args...) sr_warn(DRIVER_LOG_DOMAIN s, ## args) +#define sr_err(s, args...) sr_err(DRIVER_LOG_DOMAIN s, ## args) + +#define USB_VENDOR_ID 0x0403 +#define USB_DESCRIPTION "ChronoVu LA8" +#define USB_VENDOR_NAME "ChronoVu" +#define USB_MODEL_NAME "LA8" +#define USB_MODEL_VERSION "" + +#define NUM_PROBES 8 +#define TRIGGER_TYPES "01" +#define SDRAM_SIZE (8 * 1024 * 1024) +#define MIN_NUM_SAMPLES 1 + +#define BS 4096 /* Block size */ +#define NUM_BLOCKS 2048 /* Number of blocks */ + +/* Private, per-device-instance driver context. */ +struct dev_context { + /** FTDI device context (used by libftdi). */ + struct ftdi_context *ftdic; + + /** The currently configured samplerate of the device. */ + uint64_t cur_samplerate; + + /** The current sampling limit (in ms). */ + uint64_t limit_msec; + + /** The current sampling limit (in number of samples). */ + uint64_t limit_samples; + + /** TODO */ + void *session_dev_id; + + /** + * A buffer containing some (mangled) samples from the device. + * Format: Pretty mangled-up (due to hardware reasons), see code. + */ + uint8_t mangled_buf[BS]; + + /** + * An 8MB buffer where we'll store the de-mangled samples. + * Format: Each sample is 1 byte, MSB is channel 7, LSB is channel 0. + */ + uint8_t *final_buf; + + /** + * Trigger pattern (MSB = channel 7, LSB = channel 0). + * A 1 bit matches a high signal, 0 matches a low signal on a probe. + * Only low/high triggers (but not e.g. rising/falling) are supported. + */ + uint8_t trigger_pattern; + + /** + * Trigger mask (MSB = channel 7, LSB = channel 0). + * A 1 bit means "must match trigger_pattern", 0 means "don't care". + */ + uint8_t trigger_mask; + + /** Time (in seconds) before the trigger times out. */ + uint64_t trigger_timeout; + + /** Tells us whether an SR_DF_TRIGGER packet was already sent. */ + int trigger_found; + + /** TODO */ + time_t done; + + /** Counter/index for the data block to be read. */ + int block_counter; + + /** The divcount value (determines the sample period) for the LA8. */ + uint8_t divcount; + + /** This ChronoVu LA8's USB PID (multiple versions exist). */ + uint16_t usb_pid; +}; + +/* protocol.c */ +extern SR_PRIV uint64_t supported_samplerates[]; +extern SR_PRIV const int hwcaps[]; +extern SR_PRIV const char *probe_names[]; +extern const struct sr_samplerates samplerates; +SR_PRIV void fill_supported_samplerates_if_needed(void); +SR_PRIV int is_valid_samplerate(uint64_t samplerate); +SR_PRIV uint8_t samplerate_to_divcount(uint64_t samplerate); +SR_PRIV int la8_write(struct dev_context *devc, uint8_t *buf, int size); +SR_PRIV int la8_read(struct dev_context *devc, uint8_t *buf, int size); +SR_PRIV int la8_close(struct dev_context *devc); +SR_PRIV int la8_close_usb_reset_sequencer(struct dev_context *devc); +SR_PRIV int la8_reset(struct dev_context *devc); +SR_PRIV int configure_probes(const struct sr_dev_inst *sdi); +SR_PRIV int set_samplerate(const struct sr_dev_inst *sdi, uint64_t samplerate); +SR_PRIV int la8_read_block(struct dev_context *devc); +SR_PRIV void send_block_to_session_bus(struct dev_context *devc, int block); + +#endif