main.cpp

00001 /* mbed Microcontroller Library
00002  * Copyright (c) 2006-2013 ARM Limited
00003  *
00004  * Licensed under the Apache License, Version 2.0 (the "License");
00005  * you may not use this file except in compliance with the License.
00006  * You may obtain a copy of the License at
00007  *
00008  *     http://www.apache.org/licenses/LICENSE-2.0
00009  *
00010  * Unless required by applicable law or agreed to in writing, software
00011  * distributed under the License is distributed on an "AS IS" BASIS,
00012  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
00013  * See the License for the specific language governing permissions and
00014  * limitations under the License.
00015  */
00016 
00017 #include "mbed.h"
00018 #include "BLEDevice.h"
00019 
00020 #include "UARTService.h"
00021 
00022 #define NEED_CONSOLE_OUTPUT 0 /* Set this if you need debug messages on the console;
00023                                * it will have an impact on code-size and power consumption. */
00024 
00025 #if NEED_CONSOLE_OUTPUT
00026 #define DEBUG(...) { printf(__VA_ARGS__); }
00027 #else
00028 #define DEBUG(...) /* nothing */
00029 #endif /* #if NEED_CONSOLE_OUTPUT */
00030 
00031 BLEDevice  ble;
00032 DigitalOut led1(LED1);
00033 Serial pc(USBTX, USBRX);
00034 
00035 static uint8_t rx_buf[20];
00036 static uint8_t rx_len=0;
00037 UARTService *uartServicePtr;
00038 
00039 void disconnectionCallback(Gap::Handle_t handle, Gap::DisconnectionReason_t reason)
00040 {
00041     DEBUG("Disconnected!\n\r");
00042     DEBUG("Restarting the advertising process\n\r");
00043     ble.startAdvertising();
00044 }
00045 
00046 void onDataWritten(const GattCharacteristicWriteCBParams *params)
00047 {
00048     if ((uartServicePtr != NULL) && (params->charHandle == uartServicePtr->getTXCharacteristicHandle())) {
00049         uint16_t bytesRead = params->len;
00050         for(uint16_t index=0; index<bytesRead; index++)
00051         {
00052             pc.putc(params->data[index]);        
00053         }
00054     }
00055 }
00056 
00057 void uartCB(void)
00058 {   
00059     while(pc.readable())    
00060     {
00061         rx_buf[rx_len++] = pc.getc();    
00062         if(rx_len>=20 || rx_buf[rx_len-1]=='\0' || rx_buf[rx_len-1]=='\n')
00063         {
00064             ble.updateCharacteristicValue(uartServicePtr->getRXCharacteristicHandle(), rx_buf, rx_len);
00065             rx_len = 0;
00066             break;
00067         }
00068     }
00069 }
00070 void periodicCallback(void)
00071 {
00072     led1 = !led1;
00073 }
00074 
00075 int main(void)
00076 {
00077     led1 = 1;
00078     pc.baud(115200);
00079     
00080     pc.attach( uartCB , pc.RxIrq);
00081     Ticker ticker;
00082     ticker.attach(periodicCallback, 1);
00083 
00084     DEBUG("Initialising the nRF51822\n\r");
00085     ble.init();
00086     ble.onDisconnection(disconnectionCallback);
00087     ble.onDataWritten(onDataWritten);
00088 
00089     /* setup advertising */
00090     ble.accumulateAdvertisingPayload(GapAdvertisingData::BREDR_NOT_SUPPORTED);
00091     ble.setAdvertisingType(GapAdvertisingParams::ADV_CONNECTABLE_UNDIRECTED);
00092     ble.accumulateAdvertisingPayload(GapAdvertisingData::SHORTENED_LOCAL_NAME,
00093                                      (const uint8_t *)"BLE UART", sizeof("BLE UART") - 1);
00094     ble.accumulateAdvertisingPayload(GapAdvertisingData::COMPLETE_LIST_128BIT_SERVICE_IDS,
00095                                      (const uint8_t *)UARTServiceUUID_reversed, sizeof(UARTServiceUUID_reversed));
00096 
00097     ble.setAdvertisingInterval(Gap::MSEC_TO_ADVERTISEMENT_DURATION_UNITS(1000));
00098     ble.startAdvertising();
00099 
00100     UARTService uartService(ble);
00101     uartServicePtr = &uartService;
00102 
00103     while (true) {
00104         ble.waitForEvent();
00105     }
00106 }