beaglelogic: Add SR_CONF_CAPTURE_RATIO support.

[libsigrok.git] / src / hardware / beaglelogic / api.c

diff --git a/src/hardware/beaglelogic/api.c b/src/hardware/beaglelogic/api.c
index 3c8cc3b39f72c309c56cccaef94b04b06632285c..098efa0627927cc3bb3453ff8d8a0b76d9207baa 100644 (file)
--- a/src/hardware/beaglelogic/api.c
+++ b/src/hardware/beaglelogic/api.c
@@ -35,6 +35,7 @@ static const uint32_t devopts[] = {
        SR_CONF_LIMIT_SAMPLES | SR_CONF_GET | SR_CONF_SET,
        SR_CONF_SAMPLERATE | SR_CONF_GET | SR_CONF_SET,
        SR_CONF_TRIGGER_MATCH | SR_CONF_LIST,
+       SR_CONF_CAPTURE_RATIO | SR_CONF_GET | SR_CONF_SET,
        SR_CONF_NUM_LOGIC_CHANNELS | SR_CONF_GET,
 };
 
@@ -242,6 +243,10 @@ static int config_get(uint32_t key, GVariant **data, const struct sr_dev_inst *s
                *data = g_variant_new_uint64(devc->cur_samplerate);
                break;
 
+       case SR_CONF_CAPTURE_RATIO:
+               *data = g_variant_new_uint64(devc->capture_ratio);
+               break;
+
        case SR_CONF_NUM_LOGIC_CHANNELS:
                *data = g_variant_new_uint32(g_slist_length(sdi->channels));
                break;
@@ -286,6 +291,14 @@ static int config_set(uint32_t key, GVariant *data, const struct sr_dev_inst *sd
                }
                return beaglelogic_set_triggerflags(devc);
 
+       case SR_CONF_CAPTURE_RATIO:
+               devc->capture_ratio = g_variant_get_uint64(data);
+               if (devc->capture_ratio > 100) {
+                       devc->capture_ratio = 0;
+                       return SR_ERR;
+               }
+               return SR_OK;
+
        default:
                return SR_ERR_NA;
        }
@@ -361,7 +374,12 @@ static int dev_acquisition_start(const struct sr_dev_inst *sdi,
 
        /* Configure triggers & send header packet */
        if ((trigger = sr_session_trigger_get(sdi->session))) {
-               devc->stl = soft_trigger_logic_new(sdi, trigger, 0);
+               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;