Diff: main.cpp

Revision:

18:5f8cd32ff343

Parent:

17:4aa151182398

--- a/main.cpp	Fri Feb 13 16:05:26 2015 +0000
+++ b/main.cpp	Fri Feb 13 16:33:42 2015 +0000
@@ -13,6 +13,10 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
+ 
+//This simple program bridges the BLE UART service to the PC Serial conection available over USB
+// Based on the work of team UCL-IoT for BLE_UART_LEDCOntrol
+// https://developer.mbed.org/teams/UCL-IoT/code/BLE_UART_LEDControl_Echo/
 
 #include "mbed.h"
 #include "BLEDevice.h"
@@ -28,7 +32,7 @@
 #define DEBUG(...) /* nothing */
 #endif /* #if NEED_CONSOLE_OUTPUT */
 
-Serial pcUart(USBTX, USBRX); // tx, rx
+Serial pcUart(USBTX, USBRX); // tx, rx Still required to read data coming from the PC
 
 BLEDevice  ble;                               // Create Bluetooth object
 
@@ -41,6 +45,7 @@
     DEBUG("Restarting the advertising process\n\r");
     ble.startAdvertising();
 }
+
 /* BLE UART data received callback */
 void onDataWritten(const GattCharacteristicWriteCBParams *params)
 {
@@ -48,17 +53,16 @@
         uint16_t bytesRead = params->len;
         DEBUG("received %u bytes\n\r", bytesRead);
         DEBUG("Received string: '");
+        //Note the size of data expands to the largest string received. Need to use bytesRead to resize.
         for (int i=0;i<bytesRead; i++) {
           DEBUG("%c",params->data[i]);      
         }
-        //DEBUG((const char *)params->data);             //Note the size of data expands to the largest string received. Need to use bytesRead to resize.
-        DEBUG("'\n\r");
-        
+        DEBUG("'\n\r");       
        // ble.updateCharacteristicValue(uartServicePtr->getRXCharacteristicHandle(), params->data,bytesRead);   // Echo received characters back over BLE
     }
 }
 
-/* Periodic Ticker callback */
+/* pcUART read callback */
 void rxInterrupt(void)
 {
      while (pcUart.readable()) {
@@ -74,7 +78,7 @@
 
 int main(void)
 {
-    pcUart.attach(&rxInterrupt,Serial::RxIrq);
+    pcUart.attach(&rxInterrupt,Serial::RxIrq);  //interrupt for incoming data available from PC connection
 
     DEBUG("Initialising the nRF51822\n\r");
     ble.init();