Fix PICO_STDIO_USB_SUPPORT_CHARS_AVAILABLE_CALLBACK

peterharperuk · Feb 26, 2024 · 7399add · 7399add
1 parent cbb669b
commit 7399add
Showing 1 changed file with 7 additions and 1 deletion.
diff --git a/src/rp2_common/pico_stdio_usb/stdio_usb.c b/src/rp2_common/pico_stdio_usb/stdio_usb.c
@@ -56,11 +56,17 @@ static int64_t timer_task(__unused alarm_id_t id, __unused void *user_data) {
 
 static void low_priority_worker_irq(void) {
     if (mutex_try_enter(&stdio_usb_mutex, NULL)) {
+#if PICO_STDIO_USB_SUPPORT_CHARS_AVAILABLE_CALLBACK
         uint32_t chars_avail;
+#endif
         tud_task();
+#if PICO_STDIO_USB_SUPPORT_CHARS_AVAILABLE_CALLBACK
         chars_avail = tud_cdc_available();
+#endif
         mutex_exit(&stdio_usb_mutex);
-        if (chars_avail)  chars_available_callback(chars_available_param);
+#if PICO_STDIO_USB_SUPPORT_CHARS_AVAILABLE_CALLBACK
+        if (chars_avail) chars_available_callback(chars_available_param);
+#endif
     } else {
         // if the mutex is already owned, then we are in non IRQ code in this file.
         //