demo: Skip generating data when all channels in a group are disabled

[libsigrok.git] / src / hardware / demo / protocol.c

diff --git a/src/hardware/demo/protocol.c b/src/hardware/demo/protocol.c
index 9c4ada3b66fdc7bc1283476cc062123c0e43071f..1c1ec6074617615d52671d3417970e9402104936 100644 (file)
--- a/src/hardware/demo/protocol.c
+++ b/src/hardware/demo/protocol.c
@@ -448,7 +448,11 @@ SR_PRIV int demo_prepare_data(int fd, int revents, void *cb_data)
        todo_us = samples_todo * G_USEC_PER_SEC / devc->cur_samplerate;
 
        logic_done  = devc->num_logic_channels  > 0 ? 0 : samples_todo;
+       if (!devc->enabled_logic_channels)
+               logic_done = samples_todo;
        analog_done = devc->num_analog_channels > 0 ? 0 : samples_todo;
+       if (!devc->enabled_analog_channels)
+               analog_done = samples_todo;
 
        while (logic_done < samples_todo || analog_done < samples_todo) {
                /* Logic */