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 "ble/BLE.h"
00019 
00020 #include "ble/services/UARTService.h"
00021 #include "LSM9DS1/LSM9DS1.h"
00022 
00023 LSM9DS1 imu(p30, p7);
00024 Serial pc(p9, p11);
00025 
00026 #define NEED_CONSOLE_OUTPUT 1 /* Set this if you need debug messages on the console;
00027                                * it will have an impact on code-size and power consumption. */
00028 
00029 #if NEED_CONSOLE_OUTPUT
00030 #define DEBUG(...) { pc.printf(__VA_ARGS__); }
00031 #else
00032 #define DEBUG(...) /* nothing */
00033 #endif /* #if NEED_CONSOLE_OUTPUT */
00034 
00035 BLEDevice  ble;
00036 DigitalOut led1(LED1);
00037 
00038 UARTService *uartServicePtr;
00039 
00040 void disconnectionCallback(const Gap::DisconnectionCallbackParams_t *params)
00041 {
00042     DEBUG("Disconnected!\n\r");
00043     DEBUG("Restarting the advertising process\n\r");
00044     ble.startAdvertising();
00045 }
00046 
00047 void onDataWritten(const GattWriteCallbackParams *params)
00048 {
00049     if ((uartServicePtr != NULL) && (params->handle == uartServicePtr->getTXCharacteristicHandle())) {
00050         uint16_t bytesRead = params->len;
00051         uint8_t value = *(params->data);
00052         uint16_t status;
00053         DEBUG("received %u bytes\n\r", bytesRead);
00054         DEBUG("recevied %d data\n\r", value);
00055         
00056         switch(value) {
00057             case 49:
00058                 DEBUG("Off power\n\r");
00059                 status = imu.begin(imu.G_SCALE_245DPS, imu.A_SCALE_2G, imu.M_SCALE_4GS,
00060                                             imu.G_POWER_DOWN, imu.A_POWER_DOWN, imu.M_ODR_0625);
00061                 break;
00062             case 50:
00063                 DEBUG("Low power\n\r");
00064                 status = imu.begin(imu.G_SCALE_245DPS, imu.A_SCALE_2G, imu.M_SCALE_4GS,
00065                                             imu.G_ODR_15_BW_0, imu.A_POWER_DOWN, imu.M_ODR_0625);
00066                 break;
00067             case 51:
00068                 DEBUG("High power\n\r");
00069                 status = imu.begin(imu.G_SCALE_2000DPS, imu.A_SCALE_8G, imu.M_SCALE_16GS,
00070                                             imu.G_ODR_952_BW_100, imu.A_ODR_952, imu.M_ODR_80);
00071                 break;
00072             default:
00073                 DEBUG("Nothing happened\n\r");
00074                 break;
00075         }
00076                 
00077         pc.printf("LSM9DS1 WHO_AM_I's returned: 0x%X\r\n", status);
00078         pc.printf("Should be 0x683D\r\n");
00079         
00080         ble.updateCharacteristicValue(uartServicePtr->getRXCharacteristicHandle(), params->data, bytesRead);
00081     }
00082 }
00083 
00084 void periodicCallback(void)
00085 {
00086     led1 = !led1;
00087 }
00088 
00089 int main(void)
00090 {
00091     led1 = 1;
00092     Ticker ticker;
00093     ticker.attach(periodicCallback, 1);
00094 
00095     DEBUG("Initialising the nRF51822\n\r");
00096     pc.printf("PC: Initialising the nRF51822\n\r");
00097     ble.init();
00098     ble.onDisconnection(disconnectionCallback);
00099     ble.onDataWritten(onDataWritten);
00100 
00101     /* setup advertising */
00102     ble.accumulateAdvertisingPayload(GapAdvertisingData::BREDR_NOT_SUPPORTED);
00103     ble.setAdvertisingType(GapAdvertisingParams::ADV_CONNECTABLE_UNDIRECTED);
00104     ble.accumulateAdvertisingPayload(GapAdvertisingData::SHORTENED_LOCAL_NAME,
00105                                      (const uint8_t *)"BLE UART", sizeof("BLE UART") - 1);
00106     ble.accumulateAdvertisingPayload(GapAdvertisingData::COMPLETE_LIST_128BIT_SERVICE_IDS,
00107                                      (const uint8_t *)UARTServiceUUID_reversed, sizeof(UARTServiceUUID_reversed));
00108 
00109     ble.setAdvertisingInterval(1000); /* 1000ms; in multiples of 0.625ms. */
00110     ble.startAdvertising();
00111 
00112     UARTService uartService(ble);
00113     uartServicePtr = &uartService;
00114 
00115     while (true) {
00116         ble.waitForEvent();
00117     }
00118 }