hantek-dso: support for SR_HWCAP_FILTER

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

diff --git a/hardware/hantek-dso/api.c b/hardware/hantek-dso/api.c
index ba55e86805be572c80f1aa4fb95902a02614d9ef..898bccec597ff3648174874a0922a02dcdc679de 100644 (file)
--- a/hardware/hantek-dso/api.c
+++ b/hardware/hantek-dso/api.c
@@ -48,6 +48,7 @@ static int capabilities[] = {
        SR_HWCAP_TRIGGER_SOURCE,
        SR_HWCAP_TRIGGER_SLOPE,
        SR_HWCAP_HORIZ_TRIGGERPOS,
+       SR_HWCAP_FILTER,
        0,
 };
 
@@ -101,6 +102,13 @@ static char *trigger_sources[] = {
        NULL
 };
 
+static char *filter_targets[] = {
+       "CH1",
+       "CH2",
+       /* TODO: "TRIGGER", */
+       NULL
+};
+
 SR_PRIV libusb_context *usb_context = NULL;
 SR_PRIV GSList *dev_insts = NULL;
 
@@ -354,6 +362,9 @@ static void *hw_get_device_info(int dev_index, int dev_info_id)
        case SR_DI_TRIGGER_SOURCES:
                info = trigger_sources;
                break;
+       case SR_DI_FILTERS:
+               info = filter_targets;
+               break;
        /* TODO remove this */
        case SR_DI_CUR_SAMPLERATE:
                info = &tmp;
@@ -387,7 +398,7 @@ static int hw_dev_config_set(int dev_index, int hwcap, void *value)
        float tmp_float;
        uint64_t tmp_u64;
        int ret, i;
-       char *tmp_str;
+       char *tmp_str, **targets;
 
        if (!(sdi = sr_dev_inst_get(dev_insts, dev_index)))
                return SR_ERR;
@@ -452,6 +463,26 @@ static int hw_dev_config_set(int dev_index, int hwcap, void *value)
                if (trigger_sources[i] == 0)
                        ret = SR_ERR_ARG;
                break;
+       case SR_HWCAP_FILTER:
+               ctx->filter_ch1 = ctx->filter_ch2 = ctx->filter_trigger = 0;
+               targets = g_strsplit(value, ",", 0);
+               for (i = 0; targets[i]; i++) {
+                       if (targets[i] == '\0')
+                               /* Empty filter string can be used to clear them all. */
+                               ;
+                       else if (!strcmp(targets[i], "CH1"))
+                               ctx->filter_ch1 = TRUE;
+                       else if (!strcmp(targets[i], "CH2"))
+                               ctx->filter_ch2 = TRUE;
+                       else if (!strcmp(targets[i], "TRIGGER"))
+                               ctx->filter_trigger = TRUE;
+                       else {
+                               sr_err("invalid filter target %s", targets[i]);
+                               ret = SR_ERR_ARG;
+                       }
+               }
+               g_strfreev(targets);
+               break;
        default:
                ret = SR_ERR_ARG;
        }