sysclk-lwla: Add support for external trigger input.

[libsigrok.git] / hardware / sysclk-lwla / protocol.c

diff --git a/hardware/sysclk-lwla/protocol.c b/hardware/sysclk-lwla/protocol.c
index 5b1f2483e6ba0b38a875a0f0a1ef6b41c99d7ef0..c4d99d82ab0d10c8c64b866b7cb9f4038373e564 100644 (file)
--- a/hardware/sysclk-lwla/protocol.c
+++ b/hardware/sysclk-lwla/protocol.c
@@ -63,6 +63,7 @@ static int capture_setup(const struct sr_dev_inst *sdi)
        struct dev_context *devc;
        struct acquisition_state *acq;
        uint64_t divider_count;
+       uint64_t trigger_mask;
        uint64_t memory_limit;
        uint16_t command[3 + 10*4];
 
@@ -102,10 +103,18 @@ static int capture_setup(const struct sr_dev_inst *sdi)
        command[17] = LWLA_WORD_2(devc->trigger_edge_mask);
        command[18] = LWLA_WORD_3(devc->trigger_edge_mask);
 
-       command[19] = LWLA_WORD_0(devc->trigger_mask);
-       command[20] = LWLA_WORD_1(devc->trigger_mask);
-       command[21] = LWLA_WORD_2(devc->trigger_mask);
-       command[22] = LWLA_WORD_3(devc->trigger_mask);
+       trigger_mask = devc->trigger_mask;
+       /* Set bits to select external TRG input edge. */
+       if (devc->cfg_trigger_source == TRIGGER_EXT_TRG)
+               switch (devc->cfg_trigger_slope) {
+               case SLOPE_POSITIVE: trigger_mask |= (uint64_t)1 << 35; break; 
+               case SLOPE_NEGATIVE: trigger_mask |= (uint64_t)1 << 34; break; 
+               }
+
+       command[19] = LWLA_WORD_0(trigger_mask);
+       command[20] = LWLA_WORD_1(trigger_mask);
+       command[21] = LWLA_WORD_2(trigger_mask);
+       command[22] = LWLA_WORD_3(trigger_mask);
 
        /* Set the capture memory full threshold. This is slightly less
         * than the actual maximum, most likely in order to compensate for