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 uint64_t supported_samplerates[] = {
KHZ(200),
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;
- triggermask = 0;
- triggervalue = 0;
+ memset(&trigger, 0, sizeof(struct sigma_trigger));
for (l = probes; l; l = l->next) {
probe = (struct probe *)l->data;
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.");
return SIGROK_ERR;
}
if (probe->trigger[0] == 'f')
- triggerfall = 1;
+ trigger.fast_fall = 1;
else if (probe->trigger[0] == 'r')
- triggerfall = 0;
+ trigger.fast_fall = 0;
else {
g_warning("Asix Sigma only supports "
"rising/falling trigger in 100 "
return SIGROK_ERR;
}
- triggerpin = probe->index - 1;
+ trigger.fast_pin = 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 |= 1 << (probe->index - 1);
+ trigger.simplemask |= 1 << (probe->index - 1);
+ }
+ else if (probe->trigger[0] == '0') {
+ trigger.simplevalue |= 0 << (probe->index - 1);
+ trigger.simplemask |= 1 << (probe->index - 1);
+ }
+ else if (probe->trigger[0] == 'f') {
+ trigger.fallingmask |= 1 << (probe->index - 1);
+ ++trigger_set;
+ }
+ else if (probe->trigger[0] == 'r') {
+ trigger.risingmask |= 1 << (probe->index - 1);
+ ++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 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)) !=
+ /* Set bit in entry */
+ if ((mask & bit) &&
+ ((!(value & bit)) !=
(!(j & (1 << k)))))
- lut->m2d[i] &= ~(1 << j);
+ entry[i] &= ~(1 << j);
}
}
+}
- /* Unused when not triggering on transitions */
- lut->m3 = 0xffff;
+/* 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;
+ }
+ }
+
+ /* 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;
if (cur_samplerate >= MHZ(100)) {
sigma_set_register(WRITE_TRIGGER_SELECT1, 0x81);
- triggerselect = (1 << LEDSEL1) | (triggerfall << 3) |
- (triggerpin & 0x7);
+ triggerselect = (1 << LEDSEL1) | (trigger.fast_fall << 3) |
+ (trigger.fast_pin & 0x7);
/* All other modes. */
} else if (cur_samplerate <= MHZ(50)) {
projects / libsigrok.git / commitdiff