hantek-dso: support SR_HWCAP_VDIV

[libsigrok.git] / hardware / hantek-dso / api.c

diff --git a/hardware/hantek-dso/api.c b/hardware/hantek-dso/api.c
index 898bccec597ff3648174874a0922a02dcdc679de..6c1042ffca439250f89a550d4df137786cb9a7eb 100644 (file)
--- a/hardware/hantek-dso/api.c
+++ b/hardware/hantek-dso/api.c
@@ -49,6 +49,7 @@ static int capabilities[] = {
        SR_HWCAP_TRIGGER_SLOPE,
        SR_HWCAP_HORIZ_TRIGGERPOS,
        SR_HWCAP_FILTER,
+       SR_HWCAP_VDIV,
        0,
 };
 
@@ -95,6 +96,21 @@ static struct sr_rational timebases[] = {
        {0,0}
 };
 
+static struct sr_rational vdivs[] = {
+       /* millivolts */
+       { 10, 1000 },
+       { 20, 1000 },
+       { 50, 1000 },
+       { 100, 1000 },
+       { 200, 1000 },
+       { 500, 1000 },
+       /* volts */
+       { 1, 1 },
+       { 2, 1 },
+       { 5, 1 },
+       {0,0}
+};
+
 static char *trigger_sources[] = {
        "CH1",
        "CH2",
@@ -365,6 +381,9 @@ static void *hw_get_device_info(int dev_index, int dev_info_id)
        case SR_DI_FILTERS:
                info = filter_targets;
                break;
+       case SR_DI_VDIVS:
+               info = vdivs;
+               break;
        /* TODO remove this */
        case SR_DI_CUR_SAMPLERATE:
                info = &tmp;
@@ -483,6 +502,20 @@ static int hw_dev_config_set(int dev_index, int hwcap, void *value)
                }
                g_strfreev(targets);
                break;
+       case SR_HWCAP_VDIV:
+               /* TODO not supporting vdiv per channel yet */
+               tmp_rat = *(struct sr_rational *)value;
+               for (i = 0; vdivs[i].p && vdivs[i].q; i++) {
+                       if (vdivs[i].p == tmp_rat.p
+                                       && vdivs[i].q == tmp_rat.q) {
+                               ctx->voltage_ch1 = i;
+                               ctx->voltage_ch2 = i;
+                               break;
+                       }
+               }
+               if (vdivs[i].p == 0 && vdivs[i].q == 0)
+                       ret = SR_ERR_ARG;
+               break;
        default:
                ret = SR_ERR_ARG;
        }