Anna Bridge / Mbed OS UARTSerial_Example3

Defer the reading from and printing to the Serial port, to the global event queue.

Diff: main.cpp

Revision:
0:3a7d1a0a9b0b
diff -r 000000000000 -r 3a7d1a0a9b0b main.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Fri Nov 10 16:03:09 2017 +0000
@@ -0,0 +1,28 @@
+#include "mbed.h"
+
+DigitalOut led1(LED1);
+DigitalOut led2(LED2);
+
+UARTSerial pc(USBTX, USBRX);
+
+void callback_ex() {
+    while (1) {
+        char c;
+        if (pc.read(&c, 1) != 1) {
+            break;
+        }
+        printf("%c\n", c);
+        led2 = !led2;
+    }
+}
+
+int main() {
+    pc.set_blocking(false);
+    pc.sigio(mbed::mbed_event_queue()->event(callback_ex));
+
+    while (1) {
+        led1 = !led1;
+        wait(0.5);
+    }
+}
+