Diff: main.cpp

Revision:

1:f6715f1bf6a6

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Wed May 13 09:01:35 2015 +0000
@@ -0,0 +1,78 @@
+#include "mbed.h"
+
+/*------------ Constant definitions --------------*/
+#define TX_PIN          USBTX
+#define RX_PIN          USBRX
+#define BRATE           115200
+#define LED_PIN         LED0
+#define TOGGLE_RATE     (0.5f)
+#define BUFF_LENGTH     5
+
+/*-------- Check if platform compatible ----------*/
+#if DEVICE_SERIAL_ASYNCH
+Serial test_connection(USBTX, USBRX);
+#else
+#error "Platform not compatible with Low Power APIs for Serial"
+#endif
+
+/*------------------ Variables -------------------*/
+LowPowerTicker      blinker;
+bool                blinking = false;
+event_callback_t    serialEventCb;
+DigitalOut          LED;
+char                rx_buf[BUFF_LENGTH + 1];
+
+/*------------------ Callbacks -------------------*/
+void blink(void) {
+    LED = ~LED;
+}
+
+void serialCb(int events) {
+    /* Something triggered the callback, either buffer is full or 'S' is received */
+    unsigned char i = 0;
+    if(events & SERIAL_EVENT_RX_CHARACTER_MATCH) {
+        //Received 'S', check for buffer length
+        for(unsigned char i; i < BUFF_LENGTH; i++) {
+            //Found the length!
+            if(rx_buf[i] == 'S') break;
+        }
+        
+        // Toggle blinking
+        if(blinking) {
+            blinker.detach();
+            blinking = false;
+        } else {
+            blinker.attach(blink, TOGGLE_RATE);
+            blinking = true;
+        }
+    } else if (events & SERIAL_EVENT_RX_COMPLETE) {
+        i = BUFF_LENGTH - 1;
+    } else {
+        rx_buf[0] = 'E';
+        rx_buf[1] = 'R';
+        rx_buf[2] = 'R';
+        rx_buf[3] = '!';
+        rx_buf[4] = 0;
+        i = 3;
+    }
+    
+    // Echo string, no callback
+    test_connection.write(rx_buf, i+1, (event_callback_t*)0, 0);
+    
+    // Reset serial reception
+    test_connection.read(rx_buf, BUFF_LENGTH, &serialEventCb, SERIAL_EVENT_RX_ALL, 'S');
+}
+
+/*-------------------- Main ----------------------*/
+int main() {
+    /* Very Simple Main (tm) */
+    serialEventCb.attach(serialCb);
+    
+    /* Setup serial connection */
+    test_connection.baud(BRATE);
+    test_connection.printf("Low Power API test\n\nSend 'S' to toggle blinking\n");
+    test_connection.read(rx_buf, BUFF_LENGTH, &serialEventCb, SERIAL_EVENT_RX_ALL, 'S');
+    
+    /* Let the callbacks take care of everything */
+    while(1) sleep();
+}