dslogic: Add support for external clock edge selection.

[libsigrok.git] / src / hardware / fx2lafw / dslogic.c

diff --git a/src/hardware/fx2lafw/dslogic.c b/src/hardware/fx2lafw/dslogic.c
index 992a07a50febf4d08a4f162fd4fe60c12dffda89..619544f94c8f02fb3a3d29d92089b05293e569ca 100644 (file)
--- a/src/hardware/fx2lafw/dslogic.c
+++ b/src/hardware/fx2lafw/dslogic.c
@@ -337,8 +337,10 @@ SR_PRIV int dslogic_fpga_configure(const struct sr_dev_inst *sdi)
         * 6    1 = samplerate 400MHz
         * 5    1 = samplerate 200MHz or analog mode
         * 4    0 = logic, 1 = dso or analog
-        * 2-3  unused
-        * 1    0 = internal clock, 1 = external clock
+        * 3    unused
+        * 1-2  00 = internal clock, 
+        *              01 = external clock rising, 
+        *              11 = external clock falling
         * 0    1 = trigger enabled
         */
        v16 = 0x0000;
@@ -350,8 +352,12 @@ SR_PRIV int dslogic_fpga_configure(const struct sr_dev_inst *sdi)
                v16 = 1 << 13;
        if (devc->dslogic_continuous_mode)
                v16 |= 1 << 12;
-       if (devc->dslogic_external_clock)
+       if (devc->dslogic_external_clock){
                v16 |= 1 << 1;
+               if (devc->dslogic_clock_edge == DS_EDGE_FALLING){
+                       v16 |= 1 << 2;
+               }
+       }
 
        WL16(&cfg.mode, v16);
        v32 = ceil(SR_MHZ(100) * 1.0 / devc->cur_samplerate);