ols: Fix off-by-one when setting up trigger stages

The additional stage prevented OLS from using 4 stages.

diff --git a/src/hardware/openbench-logic-sniffer/protocol.c b/src/hardware/openbench-logic-sniffer/protocol.c
index 68022a1c6ae442cf45f5d8cb1cdf9e14aee446da..c747753abde3a0c01794a5636c728c688df4700e 100644 (file)
--- a/src/hardware/openbench-logic-sniffer/protocol.c
+++ b/src/hardware/openbench-logic-sniffer/protocol.c
@@ -582,7 +582,7 @@ ols_set_basic_trigger_stage(const struct ols_basic_trigger_desc *trigger_desc,
        cmd = CMD_SET_BASIC_TRIGGER_CONFIG0 + stage * 4;
        arg[0] = arg[1] = arg[3] = 0x00;
        arg[2] = stage;
-       if (stage == trigger_desc->num_stages)
+       if (stage == trigger_desc->num_stages - 1)
                /* Last stage, fire when this one matches. */
                arg[3] |= TRIGGER_START;
        if (send_longcommand(serial, cmd, arg) != SR_OK)
@@ -635,7 +635,7 @@ SR_PRIV int ols_prepare_acquisition(const struct sr_dev_inst *sdi)
                delaycount = readcount * (1 - devc->capture_ratio / 100.0);
                devc->trigger_at_smpl = (readcount - delaycount) * 4 -
                                        basic_trigger_desc.num_stages;
-               for (int i = 0; i <= basic_trigger_desc.num_stages; i++) {
+               for (int i = 0; i < basic_trigger_desc.num_stages; i++) {
                        sr_dbg("Setting OLS stage %d trigger.", i);
                        if ((ret = ols_set_basic_trigger_stage(
                                     &basic_trigger_desc, serial, i)) != SR_OK)
@@ -644,6 +644,7 @@ SR_PRIV int ols_prepare_acquisition(const struct sr_dev_inst *sdi)
        } else {
                /* No triggers configured, force trigger on first stage. */
                sr_dbg("Forcing trigger at stage 0.");
+               basic_trigger_desc.num_stages = 1;
                if ((ret = ols_set_basic_trigger_stage(&basic_trigger_desc,
                                                       serial, 0)) != SR_OK)
                        return ret;