kingst-la2016: add support for "probe names" scan option

[libsigrok.git] / src / hardware / kingst-la2016 / api.c

diff --git a/src/hardware/kingst-la2016/api.c b/src/hardware/kingst-la2016/api.c
index 3dee6c862ced9019bb67b4108f5003b3f89ba103..742f3e3ae6a0a3155e2516e32903894db4770c84 100644 (file)
--- a/src/hardware/kingst-la2016/api.c
+++ b/src/hardware/kingst-la2016/api.c
@@ -36,6 +36,7 @@
 
 static const uint32_t scanopts[] = {
        SR_CONF_CONN,
+       SR_CONF_PROBE_NAMES,
 };
 
 static const uint32_t drvopts[] = {
@@ -87,20 +88,23 @@ static const char *channel_names_pwm[] = {
 };
 
 /*
- * The hardware uses a 100/200/500MHz base clock (model dependent) and
- * a 16bit divider (common across all models). The range from 10kHz to
- * 100/200/500MHz should be applicable to all devices. High rates may
- * suffer from coarse resolution (e.g. in the "500MHz div 2" case) and
- * may not provide the desired 1/2/5 steps. Fortunately this exclusively
- * affects the 500MHz model where 250MHz is used instead of 200MHz and
- * the 166MHz and 125MHz rates are not presented to users. Deep memory
- * of these models and hardware compression reduce the necessity to let
- * users pick from a huge list of possible rates.
+ * The devices have an upper samplerate limit of 100/200/500 MHz each.
+ * But their hardware uses different base clocks (100/200/800MHz, this
+ * is _not_ a typo) and a 16bit divider. Which results in per-model ranges
+ * of supported rates which not only differ in the upper boundary, but
+ * also at the lower boundary. It's assumed that the 10kHz rate is not
+ * useful enough to provide by all means. Starting at 20kHz for all models
+ * simplfies the implementation of the config API routines, and eliminates
+ * redundancy in these samplerates tables.
  *
+ * Streaming mode is constrained by the channel count and samplerate
+ * product (the bits per second which need to travel the USB connection
+ * while the acquisition is executing). Because streaming mode does not
+ * compress the capture data, a later implementation may desire a finer
+ * resolution. For now let's just stick with the 1/2/5 steps.
  */
 
 static const uint64_t rates_500mhz[] = {
-       SR_KHZ(10),
        SR_KHZ(20),
        SR_KHZ(50),
        SR_KHZ(100),
@@ -113,12 +117,11 @@ static const uint64_t rates_500mhz[] = {
        SR_MHZ(20),
        SR_MHZ(50),
        SR_MHZ(100),
-       SR_MHZ(250),
+       SR_MHZ(200),
        SR_MHZ(500),
 };
 
 static const uint64_t rates_200mhz[] = {
-       SR_KHZ(10),
        SR_KHZ(20),
        SR_KHZ(50),
        SR_KHZ(100),
@@ -135,7 +138,6 @@ static const uint64_t rates_200mhz[] = {
 };
 
 static const uint64_t rates_100mhz[] = {
-       SR_KHZ(10),
        SR_KHZ(20),
        SR_KHZ(50),
        SR_KHZ(100),
@@ -429,6 +431,7 @@ static GSList *scan(struct sr_dev_driver *di, GSList *options)
        uint8_t bus, addr;
        uint16_t pid;
        const char *conn;
+       const char *probe_names;
        char conn_id[64];
        int ret;
        size_t ch_off, ch_max;
@@ -440,12 +443,16 @@ static GSList *scan(struct sr_dev_driver *di, GSList *options)
 
        conn = NULL;
        conn_devices = NULL;
+       probe_names = NULL;
        for (l = options; l; l = l->next) {
                src = l->data;
                switch (src->key) {
                case SR_CONF_CONN:
                        conn = g_variant_get_string(src->data, NULL);
                        break;
+               case SR_CONF_PROBE_NAMES:
+                       probe_names = g_variant_get_string(src->data, NULL);
+                       break;
                }
        }
        if (conn)
@@ -594,12 +601,14 @@ static GSList *scan(struct sr_dev_driver *di, GSList *options)
                ch_max = ARRAY_SIZE(channel_names_logic);
                if (ch_max > devc->model->channel_count)
                        ch_max = devc->model->channel_count;
+               devc->channel_names_logic = sr_parse_probe_names(probe_names,
+                       channel_names_logic, ch_max, ch_max, &ch_max);
                cg = sr_channel_group_new(sdi, "Logic", NULL);
                devc->cg_logic = cg;
                for (ch_idx = 0; ch_idx < ch_max; ch_idx++) {
                        ch = sr_channel_new(sdi, ch_off,
                                SR_CHANNEL_LOGIC, TRUE,
-                               channel_names_logic[ch_idx]);
+                               devc->channel_names_logic[ch_idx]);
                        ch_off++;
                        cg->channels = g_slist_append(cg->channels, ch);
                }