X-Git-Url: https://sigrok.org/gitweb/?a=blobdiff_plain;f=src%2Fhardware%2Ffx2lafw%2Fapi.c;h=213be9cf2d72488a9a5d3a216e086829c3dfc2b6;hb=787ec9dbd9613d34e0afed6ec145f24917e450c5;hp=64d3bfea574fc4a40129a2866acdd211f0b81565;hpb=aac29cc192ccf82b64e77b5e6b11b411da32deed;p=libsigrok.git

diff --git a/src/hardware/fx2lafw/api.c b/src/hardware/fx2lafw/api.c
index 64d3bfea..213be9cf 100644
--- a/src/hardware/fx2lafw/api.c
+++ b/src/hardware/fx2lafw/api.c
@@ -87,6 +87,7 @@ static const uint32_t devopts[] = {
 	SR_CONF_CONN | SR_CONF_GET,
 	SR_CONF_SAMPLERATE | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
 	SR_CONF_TRIGGER_MATCH | SR_CONF_LIST,
+	SR_CONF_CAPTURE_RATIO | SR_CONF_GET | SR_CONF_SET,
 };
 
 static const char *channel_names[] = {
@@ -253,9 +254,8 @@ static GSList *scan(GSList *options)
 		/* Fill in channellist according to this device's profile. */
 		num_logic_channels = prof->dev_caps & DEV_CAPS_16BIT ? 16 : 8;
 		for (j = 0; j < num_logic_channels; j++) {
-			if (!(ch = sr_channel_new(j, SR_CHANNEL_LOGIC, TRUE,
-					channel_names[j])))
-				return NULL;
+			ch = sr_channel_new(j, SR_CHANNEL_LOGIC, TRUE,
+					channel_names[j]);
 			sdi->channels = g_slist_append(sdi->channels, ch);
 		}
 
@@ -436,6 +436,9 @@ static int config_get(uint32_t key, GVariant **data, const struct sr_dev_inst *s
 	case SR_CONF_SAMPLERATE:
 		*data = g_variant_new_uint64(devc->cur_samplerate);
 		break;
+	case SR_CONF_CAPTURE_RATIO:
+		*data = g_variant_new_uint64(devc->capture_ratio);
+		break;
 	default:
 		return SR_ERR_NA;
 	}
@@ -478,6 +481,14 @@ static int config_set(uint32_t key, GVariant *data, const struct sr_dev_inst *sd
 		case SR_CONF_LIMIT_SAMPLES:
 			devc->limit_samples = g_variant_get_uint64(data);
 			break;
+		case SR_CONF_CAPTURE_RATIO:
+			devc->capture_ratio = g_variant_get_uint64(data);
+			if (devc->capture_ratio > 100) {
+				devc->capture_ratio = 0;
+				ret = SR_ERR;
+			} else
+				ret = SR_OK;
+			break;
 		default:
 			ret = SR_ERR_NA;
 	}
@@ -568,7 +579,12 @@ static int dev_acquisition_start(const struct sr_dev_inst *sdi, void *cb_data)
 	devc->empty_transfer_count = 0;
 
 	if ((trigger = sr_session_trigger_get(sdi->session))) {
-		devc->stl = soft_trigger_logic_new(sdi, trigger);
+		int pre_trigger_samples = 0;
+		if (devc->limit_samples > 0)
+			pre_trigger_samples = devc->capture_ratio * devc->limit_samples/100;
+		devc->stl = soft_trigger_logic_new(sdi, trigger, pre_trigger_samples);
+		if (devc->stl == NULL)
+			return SR_ERR_MALLOC;
 		devc->trigger_fired = FALSE;
 	} else
 		devc->trigger_fired = TRUE;