make *-led example a little bit more explicitHEADmaster

1 files changed, 10 insertions, 6 deletions

diff --git a/usb-led/usb-led.c b/usb-led/usb-led.c
index 8f10f9c..faa3d1b 100644
--- a/usb-led/usb-led.c
+++ b/usb-led/usb-led.c
@@ -30,21 +30,25 @@ void handle_cmd(uint8_t cmd)
   switch(cmd) {
   case '0': gpio_put(LED_PIN, 0); break;
   case '1': gpio_put(LED_PIN, 1); break;
-  default: printf("error\r\n"); return;
+  case 't': gpio_xor_mask(1<<LED_PIN); break;
+  default: printf("error\n"); return;
   }
-  printf("ok\r\n");
+  printf("ok\n");
 }
 
 int main()
 {
   gpio_init(LED_PIN);
   gpio_set_dir(LED_PIN, GPIO_OUT);
-  stdio_init_all();
+  stdio_usb_init();
+  stdio_set_translate_crlf(&stdio_usb, true);
 
   for(;;) {
-    int cmd = getchar_timeout_us(100000);
-    if(cmd != PICO_ERROR_TIMEOUT) {
-      handle_cmd(cmd);
+    if(stdio_usb_connected()) {
+      int cmd = getchar_timeout_us(100000);
+      if(cmd != PICO_ERROR_TIMEOUT) {
+        handle_cmd(cmd);
+      }
     }
   }
 }