/**
* Write data of a certain length to the LA8's FTDI device.
*
- * @param ctx The struct containing private per-device-instance data. Must not
- * be NULL. ctx->ftdic must not be NULL either.
+ * @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 context *ctx, uint8_t *buf, int size)
+SR_PRIV int la8_write(struct dev_context *devc, uint8_t *buf, int size)
{
int bytes_written;
- /* Note: Caller checked that ctx and ctx->ftdic != NULL. */
+ /* Note: Caller checked that devc and devc->ftdic != NULL. */
if (!buf) {
sr_err("la8: %s: buf was NULL", __func__);
return SR_ERR_ARG;
}
- bytes_written = ftdi_write_data(ctx->ftdic, buf, size);
+ bytes_written = ftdi_write_data(devc->ftdic, buf, size);
if (bytes_written < 0) {
sr_err("la8: %s: ftdi_write_data: (%d) %s", __func__,
- bytes_written, ftdi_get_error_string(ctx->ftdic));
- (void) la8_close_usb_reset_sequencer(ctx); /* Ignore errors. */
+ bytes_written, ftdi_get_error_string(devc->ftdic));
+ (void) la8_close_usb_reset_sequencer(devc); /* Ignore errors. */
} else if (bytes_written != size) {
sr_err("la8: %s: bytes to write: %d, bytes written: %d",
__func__, size, bytes_written);
- (void) la8_close_usb_reset_sequencer(ctx); /* Ignore errors. */
+ (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 ctx The struct containing private per-device-instance data. Must not
- * be NULL. ctx->ftdic must not be NULL either.
+ * @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 context *ctx, uint8_t *buf, int size)
+SR_PRIV int la8_read(struct dev_context *devc, uint8_t *buf, int size)
{
int bytes_read;
- /* Note: Caller checked that ctx and ctx->ftdic != NULL. */
+ /* Note: Caller checked that devc and devc->ftdic != NULL. */
if (!buf) {
sr_err("la8: %s: buf was NULL", __func__);
return SR_ERR_ARG;
}
- bytes_read = ftdi_read_data(ctx->ftdic, buf, size);
+ bytes_read = ftdi_read_data(devc->ftdic, buf, size);
if (bytes_read < 0) {
sr_err("la8: %s: ftdi_read_data: (%d) %s", __func__,
- bytes_read, ftdi_get_error_string(ctx->ftdic));
+ bytes_read, ftdi_get_error_string(devc->ftdic));
} else if (bytes_read != size) {
// sr_err("la8: %s: bytes to read: %d, bytes read: %d",
// __func__, size, bytes_read);
return bytes_read;
}
-SR_PRIV int la8_close(struct context *ctx)
+SR_PRIV int la8_close(struct dev_context *devc)
{
int ret;
- if (!ctx) {
- sr_err("la8: %s: ctx was NULL", __func__);
+ if (!devc) {
+ sr_err("la8: %s: devc was NULL", __func__);
return SR_ERR_ARG;
}
- if (!ctx->ftdic) {
- sr_err("la8: %s: ctx->ftdic was NULL", __func__);
+ if (!devc->ftdic) {
+ sr_err("la8: %s: devc->ftdic was NULL", __func__);
return SR_ERR_ARG;
}
- if ((ret = ftdi_usb_close(ctx->ftdic)) < 0) {
+ if ((ret = ftdi_usb_close(devc->ftdic)) < 0) {
sr_err("la8: %s: ftdi_usb_close: (%d) %s",
- __func__, ret, ftdi_get_error_string(ctx->ftdic));
+ __func__, ret, ftdi_get_error_string(devc->ftdic));
}
return ret;
/**
* Close the ChronoVu LA8 USB port and reset the LA8 sequencer logic.
*
- * @param ctx The struct containing private per-device-instance data.
+ * @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 context *ctx)
+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 (!ctx) {
- sr_err("la8: %s: ctx was NULL", __func__);
+ if (!devc) {
+ sr_err("la8: %s: devc was NULL", __func__);
return SR_ERR_ARG;
}
- if (!ctx->ftdic) {
- sr_err("la8: %s: ctx->ftdic was NULL", __func__);
+ if (!devc->ftdic) {
+ sr_err("la8: %s: devc->ftdic was NULL", __func__);
return SR_ERR_ARG;
}
- if (ctx->ftdic->usb_dev) {
+ if (devc->ftdic->usb_dev) {
/* Reset the LA8 sequencer logic, then wait 100ms. */
sr_dbg("la8: Resetting sequencer logic.");
- (void) la8_write(ctx, buf, 8); /* Ignore errors. */
+ (void) la8_write(devc, buf, 8); /* Ignore errors. */
g_usleep(100 * 1000);
/* Purge FTDI buffers, then reset and close the FTDI device. */
sr_dbg("la8: Purging buffers, resetting+closing FTDI device.");
/* Log errors, but ignore them (i.e., don't abort). */
- if ((ret = ftdi_usb_purge_buffers(ctx->ftdic)) < 0)
+ if ((ret = ftdi_usb_purge_buffers(devc->ftdic)) < 0)
sr_err("la8: %s: ftdi_usb_purge_buffers: (%d) %s",
- __func__, ret, ftdi_get_error_string(ctx->ftdic));
- if ((ret = ftdi_usb_reset(ctx->ftdic)) < 0)
+ __func__, ret, ftdi_get_error_string(devc->ftdic));
+ if ((ret = ftdi_usb_reset(devc->ftdic)) < 0)
sr_err("la8: %s: ftdi_usb_reset: (%d) %s", __func__,
- ret, ftdi_get_error_string(ctx->ftdic));
- if ((ret = ftdi_usb_close(ctx->ftdic)) < 0)
+ ret, ftdi_get_error_string(devc->ftdic));
+ if ((ret = ftdi_usb_close(devc->ftdic)) < 0)
sr_err("la8: %s: ftdi_usb_close: (%d) %s", __func__,
- ret, ftdi_get_error_string(ctx->ftdic));
+ ret, ftdi_get_error_string(devc->ftdic));
}
/* Close USB device, deinitialize and free the FTDI context. */
- ftdi_free(ctx->ftdic); /* Returns void. */
- ctx->ftdic = NULL;
+ ftdi_free(devc->ftdic); /* Returns void. */
+ devc->ftdic = NULL;
return SR_OK;
}
*
* The LA8 must be reset after a failed read/write operation or upon timeouts.
*
- * @param ctx The struct containing private per-device-instance data.
+ * @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 context *ctx)
+SR_PRIV int la8_reset(struct dev_context *devc)
{
uint8_t buf[BS];
time_t done, now;
int bytes_read;
- if (!ctx) {
- sr_err("la8: %s: ctx was NULL", __func__);
+ if (!devc) {
+ sr_err("la8: %s: devc was NULL", __func__);
return SR_ERR_ARG;
}
- if (!ctx->ftdic) {
- sr_err("la8: %s: ctx->ftdic was NULL", __func__);
+ if (!devc->ftdic) {
+ sr_err("la8: %s: devc->ftdic was NULL", __func__);
return SR_ERR_ARG;
}
done = 20 + time(NULL);
do {
/* TODO: Ignore errors? Check for < 0 at least! */
- bytes_read = la8_read(ctx, (uint8_t *)&buf, BS);
+ 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(ctx); /* Ignore errors. */
+ (void) la8_close_usb_reset_sequencer(devc); /* Ignore errors. */
sr_dbg("la8: Device reset finished.");
return SR_OK;
}
-SR_PRIV int configure_probes(struct context *ctx, const GSList *probes)
+SR_PRIV int configure_probes(struct dev_context *devc, const GSList *probes)
{
const struct sr_probe *probe;
const GSList *l;
uint8_t probe_bit;
char *tc;
- /* Note: Caller checked that ctx != NULL. */
+ /* Note: Caller checked that devc != NULL. */
- ctx->trigger_pattern = 0;
- ctx->trigger_mask = 0; /* Default to "don't care" for all probes. */
+ devc->trigger_pattern = 0;
+ devc->trigger_mask = 0; /* Default to "don't care" for all probes. */
for (l = probes; l; l = l->next) {
probe = (struct sr_probe *)l->data;
/* Configure the probe's trigger mask and trigger pattern. */
for (tc = probe->trigger; tc && *tc; tc++) {
- ctx->trigger_mask |= probe_bit;
+ devc->trigger_mask |= probe_bit;
/* Sanity check, LA8 only supports low/high trigger. */
if (*tc != '0' && *tc != '1') {
}
if (*tc == '1')
- ctx->trigger_pattern |= probe_bit;
+ devc->trigger_pattern |= probe_bit;
}
}
sr_dbg("la8: trigger_mask = 0x%x, trigger_pattern = 0x%x",
- ctx->trigger_mask, ctx->trigger_pattern);
+ devc->trigger_mask, devc->trigger_pattern);
return SR_OK;
}
SR_PRIV int set_samplerate(const struct sr_dev_inst *sdi, uint64_t samplerate)
{
- struct context *ctx;
+ struct dev_context *devc;
/* Note: Caller checked that sdi and sdi->priv != NULL. */
- ctx = sdi->priv;
+ devc = sdi->priv;
sr_spew("la8: Trying to set samplerate to %" PRIu64 "Hz.", samplerate);
return SR_ERR;
/* Set the new samplerate. */
- ctx->cur_samplerate = samplerate;
+ devc->cur_samplerate = samplerate;
- sr_dbg("la8: Samplerate set to %" PRIu64 "Hz.", ctx->cur_samplerate);
+ sr_dbg("la8: Samplerate set to %" PRIu64 "Hz.", devc->cur_samplerate);
return SR_OK;
}
/**
* Get a block of data from the LA8.
*
- * @param ctx The struct containing private per-device-instance data. Must not
- * be NULL. ctx->ftdic must not be NULL either.
+ * @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 context *ctx)
+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 ctx and ctx->ftdic != NULL. */
+ /* Note: Caller checked that devc and devc->ftdic != NULL. */
- sr_spew("la8: Reading block %d.", ctx->block_counter);
+ sr_spew("la8: Reading block %d.", devc->block_counter);
- bytes_read = la8_read(ctx, ctx->mangled_buf, BS);
+ 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) && (ctx->block_counter == 0)) {
+ if ((bytes_read == 0) && (devc->block_counter == 0)) {
do {
sr_spew("la8: Reading block 0 (again).");
- bytes_read = la8_read(ctx, ctx->mangled_buf, BS);
+ bytes_read = la8_read(devc, devc->mangled_buf, BS);
/* TODO: How to handle read errors here? */
now = time(NULL);
- } while ((ctx->done > now) && (bytes_read == 0));
+ } while ((devc->done > now) && (bytes_read == 0));
}
/* Check if block read was successful or a timeout occured. */
if (bytes_read != BS) {
sr_err("la8: Trigger timed out. Bytes read: %d.", bytes_read);
- (void) la8_reset(ctx); /* Ignore errors. */
+ (void) la8_reset(devc); /* Ignore errors. */
return SR_ERR;
}
/* De-mangle the data. */
- sr_spew("la8: Demangling block %d.", ctx->block_counter);
- byte_offset = ctx->block_counter * BS;
+ sr_spew("la8: 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 += (ctx->divcount == 0) ? p : (1 - p);
- ctx->final_buf[index] = ctx->mangled_buf[i];
+ 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 context *ctx, int block)
+SR_PRIV void 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 ctx/block, caller is responsible. */
+ /* 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 = ctx->trigger_pattern & ctx->trigger_mask;
+ expected_sample = devc->trigger_pattern & devc->trigger_mask;
for (i = 0; i < BS; i++) {
/* Don't continue if the trigger was found previously. */
- if (ctx->trigger_found)
+ if (devc->trigger_found)
break;
/*
* 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 (ctx->trigger_mask == 0x00)
+ if (devc->trigger_mask == 0x00)
break;
- sample = *(ctx->final_buf + (block * BS) + i);
+ sample = *(devc->final_buf + (block * BS) + i);
- if ((sample & ctx->trigger_mask) == expected_sample) {
+ if ((sample & devc->trigger_mask) == expected_sample) {
trigger_point = i;
- ctx->trigger_found = 1;
+ devc->trigger_found = 1;
break;
}
}
packet.payload = &logic;
logic.length = BS;
logic.unitsize = 1;
- logic.data = ctx->final_buf + (block * BS);
- sr_session_send(ctx->session_dev_id, &packet);
+ logic.data = devc->final_buf + (block * BS);
+ sr_session_send(devc->session_dev_id, &packet);
return;
}
packet.payload = &logic;
logic.length = trigger_point;
logic.unitsize = 1;
- logic.data = ctx->final_buf + (block * BS);
- sr_session_send(ctx->session_dev_id, &packet);
+ 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. */
(block * BS) + trigger_point);
packet.type = SR_DF_TRIGGER;
packet.payload = NULL;
- sr_session_send(ctx->session_dev_id, &packet);
+ sr_session_send(devc->session_dev_id, &packet);
/* If at least one sample is located after the trigger... */
if (trigger_point < (BS - 1)) {
packet.payload = &logic;
logic.length = BS - trigger_point;
logic.unitsize = 1;
- logic.data = ctx->final_buf + (block * BS) + trigger_point;
- sr_session_send(ctx->session_dev_id, &packet);
+ logic.data = devc->final_buf + (block * BS) + trigger_point;
+ sr_session_send(devc->session_dev_id, &packet);
}
}
projects / libsigrok.git / blobdiff