ols: Add option to use the falling edge of the external clock

[libsigrok.git] / src / hardware / openbench-logic-sniffer / api.c

diff --git a/src/hardware/openbench-logic-sniffer/api.c b/src/hardware/openbench-logic-sniffer/api.c
index a9812ce96cf1379a88dcb9af92da797c10fd04fa..2815a50a9861ab5d5369a0bad4a0daad288122b4 100644 (file)
--- a/src/hardware/openbench-logic-sniffer/api.c
+++ b/src/hardware/openbench-logic-sniffer/api.c
@@ -37,6 +37,7 @@ static const uint32_t devopts[] = {
        SR_CONF_TRIGGER_MATCH | SR_CONF_LIST,
        SR_CONF_CAPTURE_RATIO | SR_CONF_GET | SR_CONF_SET,
        SR_CONF_EXTERNAL_CLOCK | SR_CONF_SET,
+       SR_CONF_CLOCK_EDGE | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
        SR_CONF_PATTERN_MODE | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
        SR_CONF_SWAP | SR_CONF_SET,
        SR_CONF_RLE | SR_CONF_GET | SR_CONF_SET,
@@ -47,6 +48,11 @@ static const int32_t trigger_matches[] = {
        SR_TRIGGER_ONE,
 };
 
+static const char* external_clock_edges[] = {
+       "rising", // positive edge
+       "falling" // negative edge
+};
+
 #define STR_PATTERN_NONE     "None"
 #define STR_PATTERN_EXTERNAL "External"
 #define STR_PATTERN_INTERNAL "Internal"
@@ -223,6 +229,10 @@ static int config_get(uint32_t key, GVariant **data,
        case SR_CONF_RLE:
                *data = g_variant_new_boolean(devc->capture_flags & CAPTURE_FLAG_RLE ? TRUE : FALSE);
                break;
+       case SR_CONF_CLOCK_EDGE:
+               *data = g_variant_new_string(external_clock_edges[
+                       devc->capture_flags & CAPTURE_FLAG_INVERT_EXT_CLOCK ? 1 : 0]);
+               break;
        default:
                return SR_ERR_NA;
        }
@@ -266,6 +276,16 @@ static int config_set(uint32_t key, GVariant *data,
                        devc->capture_flags &= ~CAPTURE_FLAG_CLOCK_EXTERNAL;
                }
                break;
+       case SR_CONF_CLOCK_EDGE:
+               stropt = g_variant_get_string(data, NULL);
+               if (!strcmp(stropt, external_clock_edges[1])) {
+                       sr_info("Triggering on falling edge of external clock.");
+                       devc->capture_flags |= CAPTURE_FLAG_INVERT_EXT_CLOCK;
+               } else {
+                       sr_info("Triggering on rising edge of external clock.");
+                       devc->capture_flags &= ~CAPTURE_FLAG_INVERT_EXT_CLOCK;
+               }
+               break;
        case SR_CONF_PATTERN_MODE:
                stropt = g_variant_get_string(data, NULL);
                if (!strcmp(stropt, STR_PATTERN_NONE)) {
@@ -325,6 +345,9 @@ static int config_list(uint32_t key, GVariant **data,
        case SR_CONF_TRIGGER_MATCH:
                *data = std_gvar_array_i32(ARRAY_AND_SIZE(trigger_matches));
                break;
+       case SR_CONF_CLOCK_EDGE:
+               *data = std_gvar_array_str(ARRAY_AND_SIZE(external_clock_edges));
+               break;
        case SR_CONF_PATTERN_MODE:
                *data = g_variant_new_strv(ARRAY_AND_SIZE(patterns));
                break;
@@ -491,12 +514,15 @@ static int dev_acquisition_start(const struct sr_dev_inst *sdi)
        }
 
        /* Flag register. */
-       sr_dbg("Setting intpat %s, extpat %s, RLE %s, noise_filter %s, demux %s",
+       sr_dbg("Setting intpat %s, extpat %s, RLE %s, noise_filter %s, demux %s, %s clock%s",
                        devc->capture_flags & CAPTURE_FLAG_INTERNAL_TEST_MODE ? "on": "off",
                        devc->capture_flags & CAPTURE_FLAG_EXTERNAL_TEST_MODE ? "on": "off",
                        devc->capture_flags & CAPTURE_FLAG_RLE ? "on" : "off",
                        devc->capture_flags & CAPTURE_FLAG_NOISE_FILTER ? "on": "off",
-                       devc->capture_flags & CAPTURE_FLAG_DEMUX ? "on" : "off");
+                       devc->capture_flags & CAPTURE_FLAG_DEMUX ? "on" : "off",
+                       devc->capture_flags & CAPTURE_FLAG_CLOCK_EXTERNAL ? "external" : "internal",
+                       devc->capture_flags & CAPTURE_FLAG_CLOCK_EXTERNAL ? (devc->capture_flags & CAPTURE_FLAG_INVERT_EXT_CLOCK
+                               ? " on falling edge" : "on rising edge") : "");
 
        /*
         * Enable/disable OLS channel groups in the flag register according