SR_HWCAP_SAMPLERATE,
SR_HWCAP_CAPTURE_RATIO,
SR_HWCAP_LIMIT_SAMPLES,
+ SR_HWCAP_RLE,
0,
};
ols->trigger_at = -1;
ols->probe_mask = 0xffffffff;
ols->cur_samplerate = SR_KHZ(200);
+ ols->period_ps = 5000000;
return ols;
}
free(device_names[i]);
}
-hw_init_free_serial_params:
g_free(serial_params);
hw_init_free_device_names:
g_free(device_names);
return SR_OK;
}
-static void hw_closedev(int device_index)
+static int hw_closedev(int device_index)
{
struct sr_device_instance *sdi;
- if (!(sdi = sr_get_device_instance(device_instances, device_index)))
- return;
+ if (!(sdi = sr_get_device_instance(device_instances, device_index))) {
+ sr_err("ols: %s: sdi was NULL", __func__);
+ return SR_ERR; /* TODO: SR_ERR_ARG? */
+ }
+ /* TODO */
if (sdi->serial->fd != -1) {
serial_close(sdi->serial->fd);
sdi->serial->fd = -1;
sdi->status = SR_ST_INACTIVE;
}
+
+ return SR_OK;
}
static void hw_cleanup(void)
GSList *l;
struct sr_device_instance *sdi;
- /* Properly close all devices. */
+ /* Properly close and free all devices. */
for (l = device_instances; l; l = l->next) {
sdi = l->data;
if (sdi->serial->fd != -1)
} else if (samplerate < samplerates.low || samplerate > samplerates.high)
return SR_ERR_SAMPLERATE;
- ols->cur_samplerate = samplerate;
if (samplerate > CLOCK_RATE) {
ols->flag_reg |= FLAG_DEMUX;
ols->cur_samplerate_divider = (CLOCK_RATE * 2 / samplerate) - 1;
ols->cur_samplerate_divider = (CLOCK_RATE / samplerate) - 1;
}
+ /* Calculate actual samplerate used and complain if it is different
+ * from the requested.
+ */
+ ols->cur_samplerate = CLOCK_RATE / (ols->cur_samplerate_divider + 1);
+ if(ols->flag_reg & FLAG_DEMUX)
+ ols->cur_samplerate *= 2;
+ ols->period_ps = 1000000000000 / ols->cur_samplerate;
+ if(ols->cur_samplerate != samplerate)
+ sr_warn("ols: can't match samplerate %" PRIu64 ", using %" PRIu64,
+ samplerate, ols->cur_samplerate);
+
return SR_OK;
}
tmp_u64 = value;
if (*tmp_u64 < MIN_NUM_SAMPLES)
return SR_ERR;
+ if (*tmp_u64 > ols->max_samples)
+ sr_warn("ols: sample limit exceeds hw max");
ols->limit_samples = *tmp_u64;
sr_info("ols: sample limit %" PRIu64, ols->limit_samples);
ret = SR_OK;
} else
ret = SR_OK;
break;
+ case SR_HWCAP_RLE:
+ if (GPOINTER_TO_INT(value)) {
+ sr_info("ols: enabling RLE");
+ ols->flag_reg |= FLAG_RLE;
+ }
+ ret = SR_OK;
+ break;
default:
ret = SR_ERR;
}
return ret;
}
-static int receive_data(int fd, int revents, void *user_data)
+static int receive_data(int fd, int revents, void *session_data)
{
struct sr_datafeed_packet packet;
+ struct sr_datafeed_logic logic;
struct sr_device_instance *sdi;
struct ols_device *ols;
GSList *l;
- int count, buflen, num_channels, offset, i, j;
- unsigned char byte, *buffer;
+ int num_channels, offset, i, j;
+ unsigned char byte;
/* find this device's ols_device struct by its fd */
ols = NULL;
* finished. We'll double that to 30ms to be sure...
*/
sr_source_remove(fd);
- sr_source_add(fd, G_IO_IN, 30, receive_data, user_data);
+ sr_source_add(fd, G_IO_IN, 30, receive_data, session_data);
ols->raw_sample_buf = g_try_malloc(ols->limit_samples * 4);
if (!ols->raw_sample_buf) {
sr_err("ols: %s: ols->raw_sample_buf malloc failed",
num_channels++;
}
- if (revents == G_IO_IN
- && ols->num_transfers / num_channels <= ols->limit_samples) {
+ if (revents == G_IO_IN) {
if (serial_read(fd, &byte, 1) != 1)
return FALSE;
+ /* Ignore it if we've read enough. */
+ if (ols->num_samples >= ols->limit_samples)
+ return TRUE;
+
ols->sample[ols->num_bytes++] = byte;
sr_dbg("ols: received byte 0x%.2x", byte);
if (ols->num_bytes == num_channels) {
/* Got a full sample. */
sr_dbg("ols: received sample 0x%.*x",
- ols->num_bytes * 2, (int) *ols->sample);
+ ols->num_bytes * 2, *(int *)ols->sample);
if (ols->flag_reg & FLAG_RLE) {
/*
* In RLE mode -1 should never come in as a
* sample, because bit 31 is the "count" flag.
- * TODO: Endianness may be wrong here, could be
- * sample[3].
*/
- if (ols->sample[0] & 0x80
- && !(ols->last_sample[0] & 0x80)) {
- count = (int)(*ols->sample) & 0x7fffffff;
- if (!(buffer = g_try_malloc(count))) {
- sr_err("ols: %s: buffer malloc "
- "failed", __func__);
- return FALSE;
- }
-
- buflen = 0;
- for (i = 0; i < count; i++) {
- memcpy(buffer + buflen, ols->last_sample, 4);
- buflen += 4;
- }
- } else {
+ if (ols->sample[ols->num_bytes - 1] & 0x80) {
+ ols->sample[ols->num_bytes - 1] &= 0x7f;
/*
- * Just a single sample, next sample
- * will probably be a count referring
- * to this -- but this one is still a
- * part of the stream.
+ * FIXME: This will only work on
+ * little-endian systems.
*/
- buffer = ols->sample;
- buflen = 4;
+ ols->rle_count = *(int *)(ols->sample);
+ sr_dbg("ols: RLE count = %d", ols->rle_count);
+ ols->num_bytes = 0;
+ return TRUE;
}
- } else {
- /* No compression. */
- buffer = ols->sample;
- buflen = 4;
+ }
+ ols->num_samples += ols->rle_count + 1;
+ if (ols->num_samples > ols->limit_samples) {
+ /* Save us from overrunning the buffer. */
+ ols->rle_count -= ols->num_samples - ols->limit_samples;
+ ols->num_samples = ols->limit_samples;
}
if (num_channels < 4) {
}
}
memcpy(ols->sample, ols->tmp_sample, 4);
- sr_dbg("ols: full sample 0x%.8x", (int) *ols->sample);
+ sr_dbg("ols: full sample 0x%.8x", *(int *)ols->sample);
}
/* the OLS sends its sample buffer backwards.
* store it in reverse order here, so we can dump
* this on the session bus later.
*/
- offset = (ols->limit_samples - ols->num_transfers / num_channels) * 4;
- memcpy(ols->raw_sample_buf + offset, ols->sample, 4);
-
- if (buffer == ols->sample)
- memcpy(ols->last_sample, buffer, num_channels);
- else
- g_free(buffer);
-
+ offset = (ols->limit_samples - ols->num_samples) * 4;
+ for (i = 0; i <= ols->rle_count; i++) {
+ memcpy(ols->raw_sample_buf + offset + (i * 4),
+ ols->sample, 4);
+ }
memset(ols->sample, 0, 4);
ols->num_bytes = 0;
+ ols->rle_count = 0;
}
} else {
/*
if (ols->trigger_at > 0) {
/* there are pre-trigger samples, send those first */
packet.type = SR_DF_LOGIC;
- packet.length = ols->trigger_at * 4;
- packet.unitsize = 4;
- packet.payload = ols->raw_sample_buf;
- sr_session_bus(user_data, &packet);
+ packet.timeoffset = 0;
+ packet.duration = ols->trigger_at * ols->period_ps;
+ packet.payload = &logic;
+ logic.length = ols->trigger_at * 4;
+ logic.unitsize = 4;
+ logic.data = ols->raw_sample_buf +
+ (ols->limit_samples - ols->num_samples) * 4;
+ sr_session_bus(session_data, &packet);
}
+ /* send the trigger */
packet.type = SR_DF_TRIGGER;
- packet.length = 0;
- sr_session_bus(user_data, &packet);
+ packet.timeoffset = ols->trigger_at * ols->period_ps;
+ packet.duration = 0;
+ sr_session_bus(session_data, &packet);
+ /* send post-trigger samples */
packet.type = SR_DF_LOGIC;
- packet.length = (ols->limit_samples * 4) - (ols->trigger_at * 4);
- packet.unitsize = 4;
- packet.payload = ols->raw_sample_buf + ols->trigger_at * 4;
- sr_session_bus(user_data, &packet);
+ packet.timeoffset = ols->trigger_at * ols->period_ps;
+ packet.duration = (ols->num_samples - ols->trigger_at) * ols->period_ps;
+ packet.payload = &logic;
+ logic.length = (ols->num_samples * 4) - (ols->trigger_at * 4);
+ logic.unitsize = 4;
+ logic.data = ols->raw_sample_buf + ols->trigger_at * 4 +
+ (ols->limit_samples - ols->num_samples) * 4;
+ sr_session_bus(session_data, &packet);
} else {
+ /* no trigger was used */
packet.type = SR_DF_LOGIC;
- packet.length = ols->limit_samples * 4;
- packet.unitsize = 4;
- packet.payload = ols->raw_sample_buf;
- sr_session_bus(user_data, &packet);
+ packet.timeoffset = 0;
+ packet.duration = ols->num_samples * ols->period_ps;
+ packet.payload = &logic;
+ logic.length = ols->num_samples * 4;
+ logic.unitsize = 4;
+ logic.data = ols->raw_sample_buf +
+ (ols->limit_samples - ols->num_samples) * 4;
+ sr_session_bus(session_data, &packet);
}
g_free(ols->raw_sample_buf);
serial_flush(fd);
serial_close(fd);
packet.type = SR_DF_END;
- packet.length = 0;
- sr_session_bus(user_data, &packet);
+ packet.timeoffset = ols->num_samples * ols->period_ps;
+ packet.duration = 0;
+ sr_session_bus(session_data, &packet);
}
return TRUE;
}
-static int hw_start_acquisition(int device_index, gpointer session_device_id)
+static int hw_start_acquisition(int device_index, gpointer session_data)
{
struct sr_datafeed_packet *packet;
struct sr_datafeed_header *header;
uint32_t data;
uint16_t readcount, delaycount;
uint8_t changrp_mask;
+ int num_channels;
int i;
if (!(sdi = sr_get_device_instance(device_instances, device_index)))
if (sdi->status != SR_ST_ACTIVE)
return SR_ERR;
- readcount = ols->limit_samples / 4;
+ /*
+ * Enable/disable channel groups in the flag register according to the
+ * probe mask. Calculate this here, because num_channels is needed
+ * to limit readcount.
+ */
+ changrp_mask = 0;
+ num_channels = 0;
+ for (i = 0; i < 4; i++) {
+ if (ols->probe_mask & (0xff << (i * 8))) {
+ changrp_mask |= (1 << i);
+ num_channels++;
+ }
+ }
+
+ /*
+ * Limit readcount to prevent reading past the end of the hardware
+ * buffer.
+ */
+ readcount = MIN(ols->max_samples / num_channels, ols->limit_samples) / 4;
memset(trigger_config, 0, 16);
trigger_config[ols->num_stages - 1] |= 0x08;
if (send_longcommand(sdi->serial->fd, CMD_CAPTURE_SIZE, reverse16(data)) != SR_OK)
return SR_ERR;
- /*
- * Enable/disable channel groups in the flag register according to the
- * probe mask.
- */
- changrp_mask = 0;
- for (i = 0; i < 4; i++) {
- if (ols->probe_mask & (0xff << (i * 8)))
- changrp_mask |= (1 << i);
- }
-
/* The flag register wants them here, and 1 means "disable channel". */
ols->flag_reg |= ~(changrp_mask << 2) & 0x3c;
ols->flag_reg |= FLAG_FILTER;
- data = ols->flag_reg << 24;
+ ols->rle_count = 0;
+ data = (ols->flag_reg << 24) | ((ols->flag_reg << 8) & 0xff0000);
if (send_longcommand(sdi->serial->fd, CMD_SET_FLAGS, data) != SR_OK)
return SR_ERR;
return SR_ERR;
sr_source_add(sdi->serial->fd, G_IO_IN, -1, receive_data,
- session_device_id);
+ session_data);
if (!(packet = g_try_malloc(sizeof(struct sr_datafeed_packet)))) {
sr_err("ols: %s: packet malloc failed", __func__);
/* Send header packet to the session bus. */
packet->type = SR_DF_HEADER;
- packet->length = sizeof(struct sr_datafeed_header);
packet->payload = (unsigned char *)header;
header->feed_version = 1;
gettimeofday(&header->starttime, NULL);
header->samplerate = ols->cur_samplerate;
- header->protocol_id = SR_PROTO_RAW;
header->num_logic_probes = NUM_PROBES;
header->num_analog_probes = 0;
- sr_session_bus(session_device_id, packet);
+ sr_session_bus(session_data, packet);
g_free(header);
g_free(packet);
struct sr_datafeed_packet packet;
/* Avoid compiler warnings. */
- device_index = device_index;
+ (void)device_index;
packet.type = SR_DF_END;
- packet.length = 0;
sr_session_bus(session_device_id, &packet);
}
struct sr_device_plugin ols_plugin_info = {
- "ols",
- "Openbench Logic Sniffer",
- 1,
- hw_init,
- hw_cleanup,
- hw_opendev,
- hw_closedev,
- hw_get_device_info,
- hw_get_status,
- hw_get_capabilities,
- hw_set_configuration,
- hw_start_acquisition,
- hw_stop_acquisition,
+ .name = "ols",
+ .longname = "Openbench Logic Sniffer",
+ .api_version = 1,
+ .init = hw_init,
+ .cleanup = hw_cleanup,
+ .opendev = hw_opendev,
+ .closedev = hw_closedev,
+ .get_device_info = hw_get_device_info,
+ .get_status = hw_get_status,
+ .get_capabilities = hw_get_capabilities,
+ .set_configuration = hw_set_configuration,
+ .start_acquisition = hw_start_acquisition,
+ .stop_acquisition = hw_stop_acquisition,
};
projects / libsigrok.git / blobdiff