/*
* 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 char *cv_channel_names[NUM_CHANNELS + 1] = {
"0", "1", "2", "3", "4", "5", "6", "7",
NULL,
};
-SR_PRIV void fill_supported_samplerates_if_needed(void)
+SR_PRIV void cv_fill_samplerates_if_needed(void)
{
int i;
- if (chronovu_la8_samplerates[0] != 0)
+ if (cv_samplerates[0] != 0)
return;
for (i = 0; i < 255; i++)
- chronovu_la8_samplerates[254 - i] = SR_MHZ(100) / (i + 1);
+ cv_samplerates[254 - i] = SR_MHZ(100) / (i + 1);
}
/**
- * Check if the given samplerate is supported by the LA8 hardware.
+ * Check if the given samplerate is supported by the 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)
+static int is_valid_samplerate(uint64_t samplerate)
{
int i;
- fill_supported_samplerates_if_needed();
+ cv_fill_samplerates_if_needed();
for (i = 0; i < 255; i++) {
- if (chronovu_la8_samplerates[i] == samplerate)
+ if (cv_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.
*
* LA8 hardware: sample period = (divcount + 1) * 10ns.
* Min. value for divcount: 0x00 (10ns sample period, 100MHz 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)
+SR_PRIV uint8_t cv_samplerate_to_divcount(uint64_t samplerate)
{
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__);
+ sr_err("Can't get divcount, samplerate invalid.");
return 0xff;
}
}
/**
- * 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. */
+ /* Note: Caller ensures devc/devc->ftdic/buf != NULL and size > 0. */
- if (!buf) {
- sr_err("%s: buf was NULL.", __func__);
+ if (!buf)
return SR_ERR_ARG;
- }
- if (size < 0) {
- sr_err("%s: size was < 0.", __func__);
+ if (size < 0)
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__,
+ 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) cv_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) cv_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)
+SR_PRIV int cv_close(struct dev_context *devc)
{
int 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)
+SR_PRIV int cv_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__);
+ if (!devc)
return SR_ERR_ARG;
- }
if (!devc->ftdic) {
- sr_err("%s: devc->ftdic was NULL.", __func__);
+ sr_err("devc->ftdic was NULL.");
return SR_ERR_ARG;
}
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. */
}
/**
- * 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 cv_reset(struct dev_context *devc)
{
uint8_t buf[BS];
time_t done, now;
*/
done = 20 + time(NULL);
do {
- /* TODO: Ignore errors? Check for < 0 at least! */
- bytes_read = la8_read(devc, (uint8_t *)&buf, BS);
+ /* Try to read bytes until none are left (or errors occur). */
+ bytes_read = cv_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. */
+ /* Reset the sequencer logic and close the USB port. */
+ (void) cv_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;
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();
/* Check if this is a samplerate supported by the hardware. */
- if (!is_valid_samplerate(samplerate))
+ if (!is_valid_samplerate(samplerate)) {
+ sr_dbg("Failed to set invalid samplerate (%" PRIu64 "Hz).",
+ samplerate);
return SR_ERR;
+ }
/* Set the new samplerate. */
devc->cur_samplerate = 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;
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);
+ bytes_read = cv_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. */
+ (void) cv_reset(devc); /* Ignore errors. */
return SR_ERR;
}
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;
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