/*
* This file is part of the libsigrok project.
*
- * Copyright (C) 2011-2012 Uwe Hermann <uwe@hermann-uwe.de>
+ * Copyright (C) 2011-2014 Uwe Hermann <uwe@hermann-uwe.de>
*
* 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
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
-#include <ftdi.h>
-#include <glib.h>
-#include "libsigrok.h"
-#include "libsigrok-internal.h"
#include "protocol.h"
-/* Channels are numbered 0-7. */
-SR_PRIV const char *chronovu_la8_channel_names[NUM_CHANNELS + 1] = {
+SR_PRIV const struct cv_profile cv_profiles[] = {
+ { CHRONOVU_LA8, "LA8", "ChronoVu LA8", 8, SR_MHZ(100), "01",
+ 0.8388608 },
+ { CHRONOVU_LA16, "LA16", "ChronoVu LA16", 16, SR_MHZ(200), "01rf",
+ 0.042 },
+ { 0, NULL, NULL, 0, 0, NULL, 0.0 },
+};
+
+/* LA8: channels are numbered 0-7. LA16: channels are numbered 0-15. */
+SR_PRIV const char *cv_channel_names[] = {
"0", "1", "2", "3", "4", "5", "6", "7",
- NULL,
+ "8", "9", "10", "11", "12", "13", "14", "15",
};
-SR_PRIV void fill_supported_samplerates_if_needed(void)
+static int close_usb_reset_sequencer(struct dev_context *devc);
+
+SR_PRIV void cv_fill_samplerates_if_needed(const struct sr_dev_inst *sdi)
{
int i;
+ struct dev_context *devc;
- if (chronovu_la8_samplerates[0] != 0)
+ devc = sdi->priv;
+
+ if (devc->samplerates[0] != 0)
return;
for (i = 0; i < 255; i++)
- chronovu_la8_samplerates[254 - i] = SR_MHZ(100) / (i + 1);
+ devc->samplerates[254 - i] = devc->prof->max_samplerate / (i + 1);
}
/**
- * Check if the given samplerate is supported by the LA8 hardware.
+ * Check if the given samplerate is supported by the hardware.
*
+ * @param sdi Device instance.
* @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)
+static int is_valid_samplerate(const struct sr_dev_inst *sdi,
+ uint64_t samplerate)
{
int i;
+ struct dev_context *devc;
- fill_supported_samplerates_if_needed();
+ devc = sdi->priv;
+
+ cv_fill_samplerates_if_needed(sdi);
for (i = 0; i < 255; i++) {
- if (chronovu_la8_samplerates[i] == samplerate)
+ if (devc->samplerates[i] == samplerate)
return 1;
}
}
/**
- * Convert a samplerate (in Hz) to the 'divcount' value the LA8 wants.
+ * Convert a samplerate (in Hz) to the 'divcount' value the device wants.
+ *
+ * The divcount value can be 0x00 - 0xfe (0xff is not valid).
+ *
+ * LA8:
+ * sample period = (divcount + 1) * 10ns.
+ * divcount = 0x00: 10ns period, 100MHz samplerate.
+ * divcount = 0xfe: 2550ns period, 392.15kHz samplerate.
*
- * 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).
+ * LA16:
+ * sample period = (divcount + 1) * 5ns.
+ * divcount = 0x00: 5ns period, 200MHz samplerate.
+ * divcount = 0xfe: 1275ns period, ~784.31kHz samplerate.
*
+ * @param sdi Device instance.
* @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)
+SR_PRIV uint8_t cv_samplerate_to_divcount(const struct sr_dev_inst *sdi,
+ uint64_t samplerate)
{
+ struct dev_context *devc;
+
+ devc = sdi->priv;
+
if (samplerate == 0) {
- sr_err("%s: samplerate was 0.", __func__);
+ sr_err("Can't convert invalid samplerate of 0 Hz.");
return 0xff;
}
- if (!is_valid_samplerate(samplerate)) {
- sr_err("%s: Can't get divcount, samplerate invalid.", __func__);
+ if (!is_valid_samplerate(sdi, samplerate)) {
+ sr_err("Can't get divcount, samplerate invalid.");
return 0xff;
}
- return (SR_MHZ(100) / samplerate) - 1;
+ return (devc->prof->max_samplerate / samplerate) - 1;
}
/**
- * Write data of a certain length to the LA8's FTDI device.
+ * Write data of a certain length to the FTDI device.
*
* @param devc The struct containing private per-device-instance data. Must not
- * be NULL. devc->ftdic must not be NULL either.
+ * 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.
+ * @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)
+SR_PRIV int cv_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;
- }
+ /* Note: Caller ensures devc/devc->ftdic/buf != NULL and size > 0. */
bytes_written = ftdi_write_data(devc->ftdic, buf, size);
if (bytes_written < 0) {
- sr_err("%s: ftdi_write_data: (%d) %s.", __func__,
+ sr_err("Failed to write data (%d): %s.",
bytes_written, ftdi_get_error_string(devc->ftdic));
- (void) la8_close_usb_reset_sequencer(devc); /* Ignore errors. */
+ (void) 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. */
+ sr_err("Failed to write data, only %d/%d bytes written.",
+ size, bytes_written);
+ (void) close_usb_reset_sequencer(devc); /* Ignore errors. */
}
return bytes_written;
}
/**
- * Read a certain amount of bytes from the LA8's FTDI device.
+ * Read a certain amount of bytes from the FTDI device.
*
* @param devc The struct containing private per-device-instance data. Must not
- * be NULL. devc->ftdic must not be NULL either.
+ * 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)
+static int cv_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;
- }
+ /* Note: Caller ensures devc/devc->ftdic/buf != NULL and size > 0. */
bytes_read = ftdi_read_data(devc->ftdic, buf, size);
if (bytes_read < 0) {
- sr_err("%s: ftdi_read_data: (%d) %s.", __func__,
+ sr_err("Failed to read data (%d): %s.",
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);
+ // sr_err("Failed to read data, only %d/%d bytes read.",
+ // bytes_read, size);
}
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.
+ * Close the USB port and reset the 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)
+static int close_usb_reset_sequencer(struct dev_context *devc)
{
- /* Magic sequence of bytes for resetting the LA8 sequencer logic. */
+ /* Magic sequence of bytes for resetting the 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;
- }
+ /* Note: Caller checked that devc and devc->ftdic != NULL. */
if (devc->ftdic->usb_dev) {
- /* Reset the LA8 sequencer logic, then wait 100ms. */
+ /* Reset the sequencer logic, then wait 100ms. */
sr_dbg("Resetting sequencer logic.");
- (void) la8_write(devc, buf, 8); /* Ignore errors. */
+ (void) cv_write(devc, buf, 8); /* Ignore errors. */
g_usleep(100 * 1000);
/* Purge FTDI buffers, then reset and close the 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));
+ sr_err("Failed to purge FTDI buffers (%d): %s.",
+ ret, ftdi_get_error_string(devc->ftdic));
if ((ret = ftdi_usb_reset(devc->ftdic)) < 0)
- sr_err("%s: ftdi_usb_reset: (%d) %s.", __func__,
+ sr_err("Failed to reset FTDI device (%d): %s.",
ret, ftdi_get_error_string(devc->ftdic));
if ((ret = ftdi_usb_close(devc->ftdic)) < 0)
- sr_err("%s: ftdi_usb_close: (%d) %s.", __func__,
+ sr_err("Failed to close FTDI device (%d): %s.",
ret, ftdi_get_error_string(devc->ftdic));
}
/* Close USB device, deinitialize and free the FTDI context. */
- ftdi_free(devc->ftdic); /* Returns void. */
+ ftdi_free(devc->ftdic);
devc->ftdic = NULL;
return SR_OK;
}
/**
- * Reset the ChronoVu LA8.
+ * Reset the ChronoVu device.
*
- * The LA8 must be reset after a failed read/write operation or upon timeouts.
+ * A reset is required 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)
+static int reset_device(struct dev_context *devc)
{
uint8_t buf[BS];
- time_t done, now;
+ gint64 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;
- }
+ /* Note: Caller checked that devc and devc->ftdic != NULL. */
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);
+ done = (20 * G_TIME_SPAN_SECOND) + g_get_monotonic_time();
do {
- /* TODO: Ignore errors? Check for < 0 at least! */
- bytes_read = la8_read(devc, (uint8_t *)&buf, BS);
- now = time(NULL);
+ /* Try to read bytes until none are left (or errors occur). */
+ bytes_read = cv_read(devc, (uint8_t *)&buf, BS);
+ now = g_get_monotonic_time();
} 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. */
+ /* Reset the sequencer logic and close the USB port. */
+ (void) close_usb_reset_sequencer(devc); /* Ignore errors. */
sr_dbg("Device reset finished.");
return SR_OK;
}
-SR_PRIV int configure_channels(const struct sr_dev_inst *sdi)
+SR_PRIV int cv_configure_channels(const struct sr_dev_inst *sdi)
{
struct dev_context *devc;
const struct sr_channel *ch;
const GSList *l;
- uint8_t channel_bit;
+ uint16_t channel_bit;
char *tc;
devc = sdi->priv;
- devc->trigger_pattern = 0;
- devc->trigger_mask = 0; /* Default to "don't care" for all channels. */
+ devc->trigger_pattern = 0x0000; /* Default to "low" trigger. */
+ devc->trigger_mask = 0x0000; /* Default to "don't care". */
+ devc->trigger_edgemask = 0x0000; /* Default to "state triggered". */
for (l = sdi->channels; l; l = l->next) {
ch = (struct sr_channel *)l->data;
continue;
/* Note: Must only be run if ch->trigger != NULL. */
- if (ch->index < 0 || ch->index > 7) {
- sr_err("%s: Invalid channel index %d, must be "
- "between 0 and 7.", __func__, ch->index);
+ if (ch->index < 0 || ch->index > (int)devc->prof->num_channels - 1) {
+ sr_err("Invalid channel index %d, must be "
+ "between 0 and %d.", ch->index,
+ devc->prof->num_channels - 1);
return SR_ERR;
}
channel_bit = (1 << (ch->index));
- /* Configure the channel's trigger mask and trigger pattern. */
+ /* Configure the channel's trigger pattern/mask/edgemask. */
for (tc = ch->trigger; tc && *tc; tc++) {
devc->trigger_mask |= channel_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);
+ if ((devc->prof->model == CHRONOVU_LA8) &&
+ (*tc != '0' && *tc != '1')) {
+ sr_err("Invalid trigger '%c', only "
+ "'0'/'1' supported.", *tc);
return SR_ERR;
}
- if (*tc == '1')
+ /* state: 1 == high, edge: 1 == rising edge. */
+ if (*tc == '1' || *tc == 'r')
devc->trigger_pattern |= channel_bit;
+
+ /* LA16 (but not LA8) supports edge triggering. */
+ if ((devc->prof->model == CHRONOVU_LA16)) {
+ if (*tc == 'r' || *tc == 'f')
+ devc->trigger_edgemask |= channel_bit;
+ }
+
}
}
- sr_dbg("Trigger mask = 0x%x, trigger pattern = 0x%x.",
- devc->trigger_mask, devc->trigger_pattern);
+ sr_dbg("Trigger pattern/mask/edgemask = 0x%04x / 0x%04x / 0x%04x.",
+ devc->trigger_pattern, devc->trigger_mask,
+ devc->trigger_edgemask);
return SR_OK;
}
-SR_PRIV int set_samplerate(const struct sr_dev_inst *sdi, uint64_t samplerate)
+SR_PRIV int cv_set_samplerate(const struct sr_dev_inst *sdi, uint64_t samplerate)
{
struct dev_context *devc;
sr_spew("Trying to set samplerate to %" PRIu64 "Hz.", samplerate);
- fill_supported_samplerates_if_needed();
+ cv_fill_samplerates_if_needed(sdi);
/* Check if this is a samplerate supported by the hardware. */
- if (!is_valid_samplerate(samplerate))
+ if (!is_valid_samplerate(sdi, samplerate)) {
+ sr_dbg("Failed to set invalid samplerate (%" PRIu64 "Hz).",
+ samplerate);
return SR_ERR;
+ }
- /* Set the new samplerate. */
devc->cur_samplerate = samplerate;
sr_dbg("Samplerate set to %" PRIu64 "Hz.", devc->cur_samplerate);
}
/**
- * Get a block of data from the LA8.
+ * Get a block of data from the device.
*
* @param devc The struct containing private per-device-instance data. Must not
- * be NULL. devc->ftdic must not be NULL either.
+ * 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)
+SR_PRIV int cv_read_block(struct dev_context *devc)
{
- int i, byte_offset, m, mi, p, index, bytes_read;
- time_t now;
+ int i, byte_offset, m, mi, p, q, index, bytes_read;
+ gint64 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);
+ bytes_read = cv_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);
+ /* Note: If bytes_read < 0 cv_read() will log errors. */
+ bytes_read = cv_read(devc, devc->mangled_buf, BS);
+ now = g_get_monotonic_time();
} 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. */
+ (void) reset_device(devc); /* Ignore errors. */
return SR_ERR;
}
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);
+ if (devc->prof->model == CHRONOVU_LA8) {
+ p = i & (1 << 0);
+ index = m * 2 + (((byte_offset + i) - mi) / 2) * 16;
+ index += (devc->divcount == 0) ? p : (1 - p);
+ } else {
+ p = i & (1 << 0);
+ q = i & (1 << 1);
+ index = m * 4 + (((byte_offset + i) - mi) / 4) * 32;
+ index += q + (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)
+SR_PRIV void cv_send_block_to_session_bus(struct dev_context *devc, int block)
{
int i;
uint8_t sample, expected_sample;
struct sr_datafeed_logic logic;
int trigger_point; /* Relative trigger point (in this block). */
- /* Note: No sanity checks on devc/block, caller is responsible. */
+ /* Note: Caller ensures devc/devc->ftdic != NULL and block > 0. */
+
+ /* TODO: Implement/test proper trigger support for the LA16. */
/* Check if we can find the trigger condition in this block. */
trigger_point = -1;
* 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)
+ if (devc->trigger_mask == 0x0000)
break;
sample = *(devc->final_buf + (block * BS) + i);
packet.type = SR_DF_LOGIC;
packet.payload = &logic;
logic.length = BS;
- logic.unitsize = 1;
+ logic.unitsize = devc->prof->num_channels / 8;
logic.data = devc->final_buf + (block * BS);
sr_session_send(devc->cb_data, &packet);
return;
packet.type = SR_DF_LOGIC;
packet.payload = &logic;
logic.length = trigger_point;
- logic.unitsize = 1;
+ logic.unitsize = devc->prof->num_channels / 8;
logic.data = devc->final_buf + (block * BS);
sr_session_send(devc->cb_data, &packet);
}
packet.type = SR_DF_LOGIC;
packet.payload = &logic;
logic.length = BS - trigger_point;
- logic.unitsize = 1;
+ logic.unitsize = devc->prof->num_channels / 8;
logic.data = devc->final_buf + (block * BS) + trigger_point;
sr_session_send(devc->cb_data, &packet);
}
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