pbio/sys/hmi: Fix REPL auto-start.

When auto-starting the REPL, it shouldn't try to run the UI. On EV3, there isn't a compatible UI yet.

Fixes pybricks/support#2290

Author: laurensvalk

lib/pbio/sys/hmi.c

@@ -247,6 +247,13 @@ static pbio_error_t pbsys_hmi_monitor_bluetooth_state(pbio_os_state_t *state) {
  *          ::PBIO_ERROR_TIMEDOUT when there was no user interaction for a long time.
  */
 pbio_error_t pbsys_hmi_await_program_selection(void) {
+
+    #if PBSYS_CONFIG_USER_PROGRAM_AUTO_START
+    // Skip any UI, always just start the REPL.
+    pbsys_main_program_request_start(PBIO_PYBRICKS_USER_PROGRAM_ID_REPL, PBSYS_MAIN_PROGRAM_START_REQUEST_TYPE_BOOT);
+    return PBIO_SUCCESS;
+    #endif
+
     pbio_os_state_t btn_state = 0;
     pbio_os_state_t ble_state = 0;
 

lib/pbio/sys/main.c

@@ -88,10 +88,6 @@ int main(int argc, char **argv) {
     // Keep loading and running user programs until shutdown is requested.
     for (;;) {
 
-        #if PBSYS_CONFIG_USER_PROGRAM_AUTO_START
-        pbsys_main_program_request_start(PBIO_PYBRICKS_USER_PROGRAM_ID_REPL, PBSYS_MAIN_PROGRAM_START_REQUEST_TYPE_BOOT);
-        #endif
-
         // Drives all processes while waiting for user input. This completes
         // when a user program request is made using the buttons or by a
         // connected host. It is cancelled on shutdown request or idle timeout.