add (serial|usb)-led example

1 files changed, 50 insertions, 0 deletions

diff --git a/serial-led/serial-led.c b/serial-led/serial-led.c
new file mode 100644
index 0000000..8f10f9c
--- /dev/null
+++ b/serial-led/serial-led.c
@@ -0,0 +1,50 @@
+/*
+ *  spreadspace rppico utils
+ *
+ *
+ *  Copyright (C) 2013-2018 Christian Pointner <equinox@spreadspace.org>
+ *
+ *  This file is part of spreadspace rppico utils.
+ *
+ *  spreadspace rppico utils is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation, either version 3 of the License, or
+ *  any later version.
+ *
+ *  spreadspace rppico utils is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with spreadspace rppico utils. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <stdio.h>
+#include "pico/stdlib.h"
+
+const uint LED_PIN = PICO_DEFAULT_LED_PIN;
+
+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;
+  }
+  printf("ok\r\n");
+}
+
+int main()
+{
+  gpio_init(LED_PIN);
+  gpio_set_dir(LED_PIN, GPIO_OUT);
+  stdio_init_all();
+
+  for(;;) {
+    int cmd = getchar_timeout_us(100000);
+    if(cmd != PICO_ERROR_TIMEOUT) {
+      handle_cmd(cmd);
+    }
+  }
+}