static int num_probes = 0;
static int samples_per_event = 0;
static int capture_ratio = 50;
-
-/* Single-pin trigger support (100 and 200 MHz).*/
-static uint8_t triggerpin = 1;
-static uint8_t triggerfall = 0;
-
-/* Simple trigger support (<= 50 MHz). */
-static uint16_t triggermask = 1;
-static uint16_t triggervalue = 1;
+static struct sigma_trigger trigger;
+static struct sigma_state sigma;
static uint64_t supported_samplerates[] = {
KHZ(200),
"asix-sigma-phasor.fw", /* Frequency counter */
};
+static void hw_stop_acquisition(int device_index, gpointer session_device_id);
+
static int sigma_read(void *buf, size_t size)
{
int ret;
return sigma_read(data, numchunks * CHUNK_SIZE);
}
-/* Upload trigger look-up tables to Sigma */
+/* Upload trigger look-up tables to Sigma. */
static int sigma_write_trigger_lut(struct triggerlut *lut)
{
int i;
return SIGROK_OK;
}
-static int set_samplerate(struct sigrok_device_instance *sdi, uint64_t samplerate)
+static int set_samplerate(struct sigrok_device_instance *sdi,
+ uint64_t samplerate)
{
int i, ret;
cur_samplerate = samplerate;
samples_per_event = 16 / num_probes;
+ sigma.state = SIGMA_IDLE;
g_message("Firmware uploaded");
return ret;
}
-/* Only trigger on single pin supported (in 100-200 MHz modes). */
+/*
+ * In 100 and 200 MHz mode, only a single pin rising/falling can be
+ * set as trigger. In other modes, two rising/falling triggers can be set,
+ * in addition to value/mask trigger for any number of probes.
+ *
+ * The Sigma supports complex triggers using boolean expressions, but this
+ * has not been implemented yet.
+ */
static int configure_probes(GSList *probes)
{
struct probe *probe;
GSList *l;
int trigger_set = 0;
+ int probebit;
- triggermask = 0;
- triggervalue = 0;
+ memset(&trigger, 0, sizeof(struct sigma_trigger));
for (l = probes; l; l = l->next) {
probe = (struct probe *)l->data;
+ probebit = 1 << (probe->index - 1);
if (!probe->enabled || !probe->trigger)
continue;
if (cur_samplerate >= MHZ(100)) {
- /* Fast trigger support */
+ /* Fast trigger support. */
if (trigger_set) {
- g_warning("Asix Sigma only supports a single pin trigger "
- "in 100 and 200 MHz mode.");
+ g_warning("Asix Sigma only supports a single "
+ "pin trigger in 100 and 200 "
+ "MHz mode.");
return SIGROK_ERR;
}
if (probe->trigger[0] == 'f')
- triggerfall = 1;
+ trigger.fallingmask |= probebit;
else if (probe->trigger[0] == 'r')
- triggerfall = 0;
+ trigger.risingmask |= probebit;
else {
g_warning("Asix Sigma only supports "
"rising/falling trigger in 100 "
return SIGROK_ERR;
}
- triggerpin = probe->index - 1;
+ ++trigger_set;
} else {
- /* Normal trigger support */
- triggermask |= 1 << (probe->index - 1);
+ /* Simple trigger support (event). */
+ if (probe->trigger[0] == '1') {
+ trigger.simplevalue |= probebit;
+ trigger.simplemask |= probebit;
+ }
+ else if (probe->trigger[0] == '0') {
+ trigger.simplevalue &= ~probebit;
+ trigger.simplemask |= probebit;
+ }
+ else if (probe->trigger[0] == 'f') {
+ trigger.fallingmask |= probebit;
+ ++trigger_set;
+ }
+ else if (probe->trigger[0] == 'r') {
+ trigger.risingmask |= probebit;
+ ++trigger_set;
+ }
- if (probe->trigger[0] == '1')
- triggervalue |= 1 << (probe->index - 1);
- else if (probe->trigger[0] == '0')
- triggervalue |= 0 << (probe->index - 1);
- else {
- g_warning("Asix Sigma only supports "
- "trigger values in <= 50"
- " MHz mode.");
+ if (trigger_set > 2) {
+ g_warning("Asix Sigma only supports 2 rising/"
+ "falling triggers.");
return SIGROK_ERR;
}
-
}
-
- ++trigger_set;
}
return SIGROK_OK;
return ret;
}
+/* Software trigger to determine exact trigger position. */
+static int get_trigger_offset(uint16_t *samples, uint16_t last_sample,
+ struct sigma_trigger *t)
+{
+ int i;
+
+ for (i = 0; i < 8; ++i) {
+ if (i > 0)
+ last_sample = samples[i-1];
+
+ /* Simple triggers. */
+ if ((samples[i] & t->simplemask) != t->simplevalue)
+ continue;
+
+ /* Rising edge. */
+ if ((last_sample & t->risingmask) != 0 || (samples[i] &
+ t->risingmask) != t->risingmask)
+ continue;
+
+ /* Falling edge. */
+ if ((last_sample & t->fallingmask) != t->fallingmask ||
+ (samples[i] & t->fallingmask) != 0)
+ continue;
+
+ break;
+ }
+
+ /* If we did not match, return original trigger pos. */
+ return i & 0x7;
+}
+
/*
* Decode chunk of 1024 bytes, 64 clusters, 7 events per cluster.
* Each event is 20ns apart, and can contain multiple samples.
uint16_t *event;
uint16_t cur_sample;
int triggerts = -1;
- int triggeroff = 0;
+ /* Check if trigger is in this chunk. */
if (triggerpos != -1) {
if (cur_samplerate <= MHZ(50))
- triggerpos -= EVENTS_PER_CLUSTER;
- else
- triggeroff = 3;
+ triggerpos -= EVENTS_PER_CLUSTER - 1;
if (triggerpos < 0)
triggerpos = 0;
while (sent < n) {
tosend = MIN(2048, n - sent);
- packet.type = DF_LOGIC16;
+ packet.type = DF_LOGIC;
packet.length = tosend * sizeof(uint16_t);
+ packet.unitsize = 2;
packet.payload = samples + sent;
session_bus(user_data, &packet);
sent = 0;
if (i == triggerts) {
/*
- * Trigger is presumptively only accurate to event, i.e.
- * for 100 and 200 MHz, where multiple samples are coded
- * in a single event, the trigger does not match the
- * exact sample.
+ * Trigger is not always accurate to sample because of
+ * pipeline delay. However, it always triggers before
+ * the actual event. We therefore look at the next
+ * samples to pinpoint the exact position of the trigger.
*/
- tosend = (triggerpos % 7) - triggeroff;
+ tosend = get_trigger_offset(samples, *lastsample,
+ &trigger);
if (tosend > 0) {
- packet.type = DF_LOGIC16;
+ packet.type = DF_LOGIC;
packet.length = tosend * sizeof(uint16_t);
+ packet.unitsize = 2;
packet.payload = samples;
session_bus(user_data, &packet);
/* Send rest of the chunk to sigrok. */
tosend = n - sent;
- packet.type = DF_LOGIC16;
+ packet.type = DF_LOGIC;
packet.length = tosend * sizeof(uint16_t);
+ packet.unitsize = 2;
packet.payload = samples + sent;
session_bus(user_data, &packet);
struct datafeed_packet packet;
const int chunks_per_read = 32;
unsigned char buf[chunks_per_read * CHUNK_SIZE];
- int bufsz, numchunks, curchunk, i, newchunks;
- uint32_t triggerpos, stoppos, running_msec;
+ int bufsz, numchunks, i, newchunks;
+ uint32_t running_msec;
struct timeval tv;
- uint16_t lastts = 0;
- uint16_t lastsample = 0;
- uint8_t modestatus;
- int triggerchunk = -1;
fd = fd;
revents = revents;
- /* Get the current position. */
- sigma_read_pos(&stoppos, &triggerpos);
- numchunks = stoppos / 512;
-
- /* Check if the has expired, or memory is full. */
- gettimeofday(&tv, 0);
- running_msec = (tv.tv_sec - start_tv.tv_sec) * 1000 +
- (tv.tv_usec - start_tv.tv_usec) / 1000;
+ numchunks = sigma.stoppos / 512;
- if (running_msec < limit_msec && numchunks < 32767)
+ if (sigma.state == SIGMA_IDLE)
return FALSE;
- /* Stop acqusition. */
- sigma_set_register(WRITE_MODE, 0x11);
+ if (sigma.state == SIGMA_CAPTURE) {
- /* Set SDRAM Read Enable. */
- sigma_set_register(WRITE_MODE, 0x02);
+ /* Check if the timer has expired, or memory is full. */
+ gettimeofday(&tv, 0);
+ running_msec = (tv.tv_sec - start_tv.tv_sec) * 1000 +
+ (tv.tv_usec - start_tv.tv_usec) / 1000;
- /* Get the current position. */
- sigma_read_pos(&stoppos, &triggerpos);
+ if (running_msec < limit_msec && numchunks < 32767)
+ return FALSE;
- /* Check if trigger has fired. */
- modestatus = sigma_get_register(READ_MODE);
- if (modestatus & 0x20) {
- triggerchunk = triggerpos / 512;
- }
+ hw_stop_acquisition(-1, user_data);
+
+ return FALSE;
+
+ } else if (sigma.state == SIGMA_DOWNLOAD) {
+ if (sigma.chunks_downloaded >= numchunks) {
+ /* End of samples. */
+ packet.type = DF_END;
+ packet.length = 0;
+ session_bus(user_data, &packet);
- /* Download sample data. */
- for (curchunk = 0; curchunk < numchunks;) {
- newchunks = MIN(chunks_per_read, numchunks - curchunk);
+ sigma.state = SIGMA_IDLE;
+
+ return TRUE;
+ }
+
+ newchunks = MIN(chunks_per_read,
+ numchunks - sigma.chunks_downloaded);
g_message("Downloading sample data: %.0f %%",
- 100.0 * curchunk / numchunks);
+ 100.0 * sigma.chunks_downloaded / numchunks);
- bufsz = sigma_read_dram(curchunk, newchunks, buf);
+ bufsz = sigma_read_dram(sigma.chunks_downloaded,
+ newchunks, buf);
/* Find first ts. */
- if (curchunk == 0)
- lastts = *(uint16_t *) buf - 1;
+ if (sigma.chunks_downloaded == 0) {
+ sigma.lastts = *(uint16_t *) buf - 1;
+ sigma.lastsample = 0;
+ }
/* Decode chunks and send them to sigrok. */
for (i = 0; i < newchunks; ++i) {
- if (curchunk + i == triggerchunk)
+ if (sigma.chunks_downloaded + i == sigma.triggerchunk)
decode_chunk_ts(buf + (i * CHUNK_SIZE),
- &lastts, &lastsample,
- triggerpos & 0x1ff, user_data);
+ &sigma.lastts, &sigma.lastsample,
+ sigma.triggerpos & 0x1ff,
+ user_data);
else
decode_chunk_ts(buf + (i * CHUNK_SIZE),
- &lastts, &lastsample,
+ &sigma.lastts, &sigma.lastsample,
-1, user_data);
}
- curchunk += newchunks;
+ sigma.chunks_downloaded += newchunks;
}
- /* End of data. */
- packet.type = DF_END;
- packet.length = 0;
- session_bus(user_data, &packet);
-
return TRUE;
}
-/*
- * Build trigger LUTs used by 50 MHz and lower sample rates for supporting
- * simple pin change and state triggers. Only two transitions (rise/fall) can be
- * set at any time, but a full mask and value can be set (0/1).
- */
-static int build_basic_trigger(struct triggerlut *lut)
+/* Build a LUT entry used by the trigger functions. */
+static void build_lut_entry(uint16_t value, uint16_t mask, uint16_t *entry)
{
int i, j, k, bit;
- memset(lut, 0, sizeof(struct triggerlut));
-
- /* Unknown */
- lut->m4 = 0xa000;
-
- /* Set the LUT for controlling value/maske trigger */
-
/* For each quad probe. */
for (i = 0; i < 4; ++i) {
- lut->m2d[i] = 0xffff;
+ entry[i] = 0xffff;
/* For each bit in LUT. */
for (j = 0; j < 16; ++j)
for (k = 0; k < 4; ++k) {
bit = 1 << (i * 4 + k);
- if ((triggermask & bit) &&
- ((!(triggervalue & bit)) !=
- (!(j & (1 << k)))))
- lut->m2d[i] &= ~(1 << j);
+ /* Set bit in entry */
+ if ((mask & bit) &&
+ ((!(value & bit)) !=
+ (!(j & (1 << k)))))
+ entry[i] &= ~(1 << j);
+ }
+ }
+}
+
+/* Add a logical function to LUT mask. */
+static void add_trigger_function(enum triggerop oper, enum triggerfunc func,
+ int index, int neg, uint16_t *mask)
+{
+ int i, j;
+ int x[2][2], tmp, a, b, aset, bset, rset;
+
+ memset(x, 0, 4 * sizeof(int));
+
+ /* Trigger detect condition. */
+ switch (oper) {
+ case OP_LEVEL:
+ x[0][1] = 1;
+ x[1][1] = 1;
+ break;
+ case OP_NOT:
+ x[0][0] = 1;
+ x[1][0] = 1;
+ break;
+ case OP_RISE:
+ x[0][1] = 1;
+ break;
+ case OP_FALL:
+ x[1][0] = 1;
+ break;
+ case OP_RISEFALL:
+ x[0][1] = 1;
+ x[1][0] = 1;
+ break;
+ case OP_NOTRISE:
+ x[1][1] = 1;
+ x[0][0] = 1;
+ x[1][0] = 1;
+ break;
+ case OP_NOTFALL:
+ x[1][1] = 1;
+ x[0][0] = 1;
+ x[0][1] = 1;
+ break;
+ case OP_NOTRISEFALL:
+ x[1][1] = 1;
+ x[0][0] = 1;
+ break;
+ }
+
+ /* Transpose if neg is set. */
+ if (neg) {
+ for (i = 0; i < 2; ++i)
+ for (j = 0; j < 2; ++j) {
+ tmp = x[i][j];
+ x[i][j] = x[1-i][1-j];
+ x[1-i][1-j] = tmp;
}
}
- /* Unused when not triggering on transitions */
- lut->m3 = 0xffff;
+ /* Update mask with function. */
+ for (i = 0; i < 16; ++i) {
+ a = (i >> (2 * index + 0)) & 1;
+ b = (i >> (2 * index + 1)) & 1;
+
+ aset = (*mask >> i) & 1;
+ bset = x[b][a];
+
+ if (func == FUNC_AND || func == FUNC_NAND)
+ rset = aset & bset;
+ else if (func == FUNC_OR || func == FUNC_NOR)
+ rset = aset | bset;
+ else if (func == FUNC_XOR || func == FUNC_NXOR)
+ rset = aset ^ bset;
+
+ if (func == FUNC_NAND || func == FUNC_NOR || func == FUNC_NXOR)
+ rset = !rset;
+
+ *mask &= ~(1 << i);
+
+ if (rset)
+ *mask |= 1 << i;
+ }
+}
+
+/*
+ * Build trigger LUTs used by 50 MHz and lower sample rates for supporting
+ * simple pin change and state triggers. Only two transitions (rise/fall) can be
+ * set at any time, but a full mask and value can be set (0/1).
+ */
+static int build_basic_trigger(struct triggerlut *lut)
+{
+ int i,j;
+ uint16_t masks[2] = { 0, 0 };
+
+ memset(lut, 0, sizeof(struct triggerlut));
+
+ /* Contant for simple triggers. */
+ lut->m4 = 0xa000;
+
+ /* Value/mask trigger support. */
+ build_lut_entry(trigger.simplevalue, trigger.simplemask, lut->m2d);
+
+ /* Rise/fall trigger support. */
+ for (i = 0, j = 0; i < 16; ++i) {
+ if (trigger.risingmask & (1 << i) ||
+ trigger.fallingmask & (1 << i))
+ masks[j++] = 1 << i;
+ }
+
+ build_lut_entry(masks[0], masks[0], lut->m0d);
+ build_lut_entry(masks[1], masks[1], lut->m1d);
+
+ /* Add glue logic */
+ if (masks[0] || masks[1]) {
+ /* Transition trigger. */
+ if (masks[0] & trigger.risingmask)
+ add_trigger_function(OP_RISE, FUNC_OR, 0, 0, &lut->m3);
+ if (masks[0] & trigger.fallingmask)
+ add_trigger_function(OP_FALL, FUNC_OR, 0, 0, &lut->m3);
+ if (masks[1] & trigger.risingmask)
+ add_trigger_function(OP_RISE, FUNC_OR, 1, 0, &lut->m3);
+ if (masks[1] & trigger.fallingmask)
+ add_trigger_function(OP_FALL, FUNC_OR, 1, 0, &lut->m3);
+ } else {
+ /* Only value/mask trigger. */
+ lut->m3 = 0xffff;
+ }
- /* Triggertype: event */
+ /* Triggertype: event. */
lut->params.selres = 3;
return SIGROK_OK;
uint8_t triggerselect;
struct triggerinout triggerinout_conf;
struct triggerlut lut;
+ int triggerpin;
session_device_id = session_device_id;
if (cur_samplerate >= MHZ(100)) {
sigma_set_register(WRITE_TRIGGER_SELECT1, 0x81);
- triggerselect = (1 << LEDSEL1) | (triggerfall << 3) |
- (triggerpin & 0x7);
+ /* Find which pin to trigger on from mask. */
+ for (triggerpin = 0; triggerpin < 8; ++triggerpin)
+ if ((trigger.risingmask | trigger.fallingmask) &
+ (1 << triggerpin))
+ break;
+
+ /* Set trigger pin and light LED on trigger. */
+ triggerselect = (1 << LEDSEL1) | (triggerpin & 0x7);
+
+ /* Default rising edge. */
+ if (trigger.fallingmask)
+ triggerselect |= 1 << 3;
/* All other modes. */
} else if (cur_samplerate <= MHZ(50)) {
}
/* Setup maximum post trigger time. */
- sigma_set_register(WRITE_POST_TRIGGER, (capture_ratio * 256) / 100);
+ sigma_set_register(WRITE_POST_TRIGGER, (capture_ratio * 255) / 100);
/* Start acqusition. */
gettimeofday(&start_tv, 0);
gettimeofday(&header.starttime, NULL);
header.samplerate = cur_samplerate;
header.protocol_id = PROTO_RAW;
- header.num_probes = num_probes;
+ header.num_logic_probes = num_probes;
+ header.num_analog_probes = 0;
session_bus(session_device_id, &packet);
/* Add capture source. */
source_add(0, G_IO_IN, 10, receive_data, session_device_id);
+ sigma.state = SIGMA_CAPTURE;
+
return SIGROK_OK;
}
static void hw_stop_acquisition(int device_index, gpointer session_device_id)
{
+ uint8_t modestatus;
+
device_index = device_index;
session_device_id = session_device_id;
/* Stop acquisition. */
sigma_set_register(WRITE_MODE, 0x11);
- // XXX Set some state to indicate that data should be sent to sigrok
- // Now, we just wait for timeout
+ /* Set SDRAM Read Enable. */
+ sigma_set_register(WRITE_MODE, 0x02);
+
+ /* Get the current position. */
+ sigma_read_pos(&sigma.stoppos, &sigma.triggerpos);
+
+ /* Check if trigger has fired. */
+ modestatus = sigma_get_register(READ_MODE);
+ if (modestatus & 0x20) {
+ sigma.triggerchunk = sigma.triggerpos / 512;
+
+ } else
+ sigma.triggerchunk = -1;
+
+ sigma.chunks_downloaded = 0;
+
+ sigma.state = SIGMA_DOWNLOAD;
}
struct device_plugin asix_sigma_plugin_info = {
projects / libsigrok.git / blobdiff