hameg-hmo: Fix the logic for the horizontal trigger position in config_set()

[libsigrok.git] / hardware / hameg-hmo / api.c

diff --git a/hardware/hameg-hmo/api.c b/hardware/hameg-hmo/api.c
index b82d2a3ffe628d37f5efc0374cc018c07de0bc6b..eeccf7cfbf7f5dfc5adeea235f165ee40e275250 100644 (file)
--- a/hardware/hameg-hmo/api.c
+++ b/hardware/hameg-hmo/api.c
@@ -400,10 +400,16 @@ static int config_set(int key, GVariant *data, const struct sr_dev_inst *sdi,
                if (tmp_d < 0.0 || tmp_d > 1.0)
                        return SR_ERR;
 
-               state->horiz_triggerpos = -(tmp_d - 0.5) * state->timebase * model->num_xdivs;
+               state->horiz_triggerpos = tmp_d;
+               tmp_d = -(tmp_d - 0.5) *
+                       ((double) (*model->timebases)[state->timebase][0] /
+                       (*model->timebases)[state->timebase][1])
+                        * model->num_xdivs;
+
+               g_ascii_formatd(float_str, sizeof(float_str), "%E", tmp_d);
                g_snprintf(command, sizeof(command),
                           (*model->scpi_dialect)[SCPI_CMD_SET_HORIZ_TRIGGERPOS],
-                          state->horiz_triggerpos);
+                          float_str);
 
                ret = sr_scpi_send(sdi->conn, command);
                break;