File content as of revision 6:e640afab8288:

#include "mbed.h"
#include "BLEDevice.h"
#include "MPU6050.h"

/*
#define DBG 1
#define NEED_CONSOLE_OUTPUT 1 // Set this if you need debug messages on the console;
                              // it will have an impact on code-size and power consumption.

#if NEED_CONSOLE_OUTPUT
Serial  pc(USBTX, USBRX);
#define DEBUG(...) { pc.printf(__VA_ARGS__); }
#else
#define DEBUG(...) // nothing //
#endif // #if NEED_CONSOLE_OUTPUT //
*/

BLEDevice   ble;

MPU6050 mpu(I2C_SDA0, I2C_SCL0);
  
static const char DEVICENAME[] = "BLE-Nano";
static volatile bool  triggerSensorPolling = false;

//9FDF3283-9049-CF8D-5C4D-98E7E2002731
//const uint8_t MPU6050_adv_service_uuid[] = {
//    0x9F,0xDF,0x32,0x83,
//    0x90,0x49,
//    0xCF,0x8D,
//    0x5C,0x4D,    
//    0x98,0xE7,0xE2,0x00,0x27,0x31
//};

const uint8_t MPU6050_service_uuid[] = {
    0x31,0x27,0x00,0xE2,0xE7,0x98,0x4D,0x5C,0x8D,0xCF,0x49,0x90,0x83,0x32,0xDF,0x9F
};

const uint8_t MPU6050_Accel_Characteristic_uuid[] = {
    0xFF,0xA2,0x8C,0xDE,0x65,0x25,
    0x44,0x89,
    0x80,0x1C,
    0x1C,0x06,0x0C,0xAC,0x97,0x67
};

static const uint8_t MPU6050_Write_Characteristic_uuid[] =
{
    0x65, 0x60, 0xBE, 0x95,0xD9, 0x31, 
    0x4F, 0x64,
    0x95, 0x75,
    0xC6, 0xDD, 0xB5, 0xAE, 0x7F, 0xA5
};

//const uint8_t MPU6050_Gyro_Characteristic_uuid[] = {
//    0x65, 0x60, 0xBE, 0x95,0xD9, 0x31, 
//    0x4F, 0x64,
//    0x95, 0x75,
//    0xC6, 0xDD, 0xB5, 0xAE, 0x7F, 0xA5
//};

uint8_t accelPayload[sizeof(float)*8] = {0,};
uint8_t writePayload[3] = {0,};

//uint8_t gyroPayload[sizeof(float)*3] = {0,0,0};
//uint8_t tempPayload[sizeof(float)*1] = {0};
//uint8_t batt = 100;     /* Battery level */
//uint8_t read_batt = 0;  /* Variable to hold battery level reads */

GattCharacteristic  accelChar (MPU6050_Accel_Characteristic_uuid,
                                        accelPayload, (sizeof(float) * 8), (sizeof(float) * 8),
                                        GattCharacteristic::BLE_GATT_CHAR_PROPERTIES_READ);

GattCharacteristic  writeChar (MPU6050_Write_Characteristic_uuid,
                                        writePayload, 3, 3,
                                        GattCharacteristic::BLE_GATT_CHAR_PROPERTIES_WRITE | GattCharacteristic::BLE_GATT_CHAR_PROPERTIES_WRITE_WITHOUT_RESPONSE);

// | GattCharacteristic::BLE_GATT_CHAR_PROPERTIES_WRITE_WITHOUT_RESPONSE);
//GattCharacteristic  gyroChar (MPU6050_Gyro_Characteristic_uuid,
//                                        gyroPayload, (sizeof(float) * 3), (sizeof(float) * 3),
//                                        GattCharacteristic::BLE_GATT_CHAR_PROPERTIES_READ);

//GattCharacteristic *ControllerChars[] = { &accelChar, &gyroChar, };
GattCharacteristic *ControllerChars[] = { &accelChar, &writeChar, };
GattService         MPU6050Service(MPU6050_service_uuid, ControllerChars, sizeof(ControllerChars) / sizeof(GattCharacteristic *));

Timer timer;

void updateValue();

void disconnectionCallback(Gap::Handle_t handle, Gap::DisconnectionReason_t reason)    // Mod
{
    
    //DEBUG("Disconnected handle %u, reason %u\n", handle, reason);
    //DEBUG("Restarting the advertising process\n\r");

    ble.startAdvertising();
}

void onConnectionCallback(Gap::Handle_t handle, Gap::addr_type_t peerAddrType, const Gap::address_t peerAddr, const Gap::ConnectionParams_t *params)   //Mod
{

    //DEBUG("connected. Got handle %u\r\n", handle);

    /*******************************************************************************/
    /*  CentralがMacOS X の時 connection intervalを設定する場合は                      */
    /*  nRF51822 -> projectconfig.h -> GAP ->                                      */
    /*  CFG_GAP_CONNECTION_MIN_INTERVAL_MS / CFG_GAP_CONNECTION_MAX_INTERVAL_MSを  */
    /*  直接編集すること                                                             */
    /******************************************************************************/
    
    #define MIN_CONN_INTERVAL 250  /**< Minimum connection interval (250 ms) */
    #define MAX_CONN_INTERVAL 350  /**< Maximum connection interval (350 ms). */
    #define CONN_SUP_TIMEOUT  6000 /**< Connection supervisory timeout (6 seconds). */
    #define SLAVE_LATENCY     4

        Gap::ConnectionParams_t gap_conn_params;
        gap_conn_params.minConnectionInterval        = Gap::MSEC_TO_GAP_DURATION_UNITS(MIN_CONN_INTERVAL);
        gap_conn_params.maxConnectionInterval        = Gap::MSEC_TO_GAP_DURATION_UNITS(MAX_CONN_INTERVAL);
        gap_conn_params.connectionSupervisionTimeout = Gap::MSEC_TO_GAP_DURATION_UNITS(CONN_SUP_TIMEOUT);
        gap_conn_params.slaveLatency                 = SLAVE_LATENCY;
        ble.updateConnectionParams(handle, &gap_conn_params);
    //if (ble.updateConnectionParams(handle, &gap_conn_params) != BLE_ERROR_NONE) {
    //    DEBUG("failed to update connection paramter\r\n");
    //}
}

void onDataWritten(const GattCharacteristicWriteCBParams *params){

    if (params->charHandle == writeChar.getValueAttribute().getHandle()) {
        uint16_t len = params->len;
        
        if (len == 3) {
            uint8_t controller[3] = {0};

            ble.readCharacteristicValue(writeChar.getValueAttribute().getHandle(), writePayload, &len);
            memcpy( &controller, writePayload, sizeof(controller));
            
            /* mpu reset */
            if(controller[0] == 1){
                mpu.initialize();
            }
            
            /*
                MPU6050_ACCELERO_RANGE_2G    0
                MPU6050_ACCELERO_RANGE_4G    1
                MPU6050_ACCELERO_RANGE_8G    2
            */
            switch(controller[1]){
                case 0:
                    mpu.setAcceleroRange(0);
                    break;
                case 1:
                    mpu.setAcceleroRange(1);
                    break;
                case 2:
                    mpu.setAcceleroRange(2);
                    break;
                default:
                    break;  
            }
            
            /*
            MPU6050_GYRO_RANGE_250          0
            MPU6050_GYRO_RANGE_500          1
            MPU6050_GYRO_RANGE_1000         2
            MPU6050_GYRO_RANGE_2000         3 
            */
            switch(controller[2]){
                case 0:
                    mpu.setGyroRange(0);
                    break;
                case 1:
                    mpu.setGyroRange(1);
                    break;
                case 2:
                    mpu.setGyroRange(2);
                    break;
                case 3:
                    mpu.setGyroRange(3);
                    break;
                default:
                    break;
            }
        }
    }
}

void timeoutCallback(void)
{
    //DEBUG("TimeOut\n\r");
    //DEBUG("Restarting the advertising process\n\r");    

    ble.startAdvertising();
}

void periodicCallback(void)
{
    //oneSecondLed = !oneSecondLed; /* Do blinky on LED1 while we're waiting for BLE events */

    /* Note that the periodicCallback() executes in interrupt context, so it is safer to do
     * heavy-weight sensor polling from the main thread. */
    triggerSensorPolling = true;
}

/**************************************************************************/
/*!
    @brief  Program entry point
*/
/**************************************************************************/
int main(void)
{
    
    //#if DBG
    //    pc.printf("Start\n\r");
    //#endif
    
    if( mpu.testConnection() ){
        //pc.printf("mpu test:OK\n\r");
    }else{
        //pc.printf("mpu test:NG\n\r");
    }
    
    //Ticker ticker;
    //ticker.attach(periodicCallback, 0.25f); //1sec
    
    ble.init();
    ble.onDisconnection(disconnectionCallback);
    ble.onConnection(onConnectionCallback);
    ble.onDataWritten(onDataWritten);
    ble.onTimeout(timeoutCallback);

    /* setup device name */
    ble.setDeviceName((const uint8_t *)DEVICENAME);
    
    /* setup advertising */
    ble.accumulateAdvertisingPayload(GapAdvertisingData::BREDR_NOT_SUPPORTED  | GapAdvertisingData::LE_GENERAL_DISCOVERABLE);
    ble.setAdvertisingType(GapAdvertisingParams::ADV_CONNECTABLE_UNDIRECTED);
    ble.accumulateAdvertisingPayload(GapAdvertisingData::COMPLETE_LOCAL_NAME, (const uint8_t *)DEVICENAME, sizeof(DEVICENAME));
    ble.accumulateAdvertisingPayload(GapAdvertisingData::COMPLETE_LIST_128BIT_SERVICE_IDS,
                                    (const uint8_t *)MPU6050_service_uuid, sizeof(MPU6050_service_uuid));
                                    //(const uint8_t *)MPU6050_adv_service_uuid, sizeof(MPU6050_adv_service_uuid));

    ble.setAdvertisingInterval(160); /* 100ms; in multiples of 0.625ms. */
    ble.startAdvertising();

    ble.addService(MPU6050Service);
    
    while(true) {
        //if (triggerSensorPolling && ble.getGapState().connected) {
            //triggerSensorPolling = false;
            updateValue();
        //} else {
        //    ble.waitForEvent();
        //}
    }
}

void updateValue(void){

    float   acData[3];
    float   gyData[3];
    float   tempData = 0.0f;
    float   t = 0.0f;
    
    timer.start();
    
    //加速度を取得
    mpu.getAccelero(acData);
    
    memcpy(accelPayload+sizeof(float)*0, &acData[0], sizeof(acData[0]));
    memcpy(accelPayload+sizeof(float)*1, &acData[1], sizeof(acData[1]));
    memcpy(accelPayload+sizeof(float)*2, &acData[2], sizeof(acData[2]));

    //ジャイロを取得
    mpu.getGyro(gyData);

    memcpy(accelPayload+sizeof(float)*3, &gyData[0], sizeof(gyData[0]));
    memcpy(accelPayload+sizeof(float)*4, &gyData[1], sizeof(gyData[1]));
    memcpy(accelPayload+sizeof(float)*5, &gyData[2], sizeof(gyData[2]));

    //温度を取得
    tempData = mpu.getTemp();

    memcpy(accelPayload+sizeof(float)*6, &tempData, sizeof(tempData));
    /*
    pc.printf("Accel: %.3lf,%.3lf,%.3lf\r\n",
                        *(float*)&accelPayload[sizeof(float)*0],
                        *(float*)&accelPayload[sizeof(float)*1],
                        *(float*)&accelPayload[sizeof(float)*2]);
    
    pc.printf("Gyro: %.3lf,%.3lf,%.3lf\r\n",
                        *(float*)&gyroPayload[sizeof(float)*0],
                        *(float*)&gyroPayload[sizeof(float)*1],
                        *(float*)&gyroPayload[sizeof(float)*2]);
        
    pc.printf("Temp: %.3lf\r\n", *(float*)&tempPayload[sizeof(float)*0]);
    pc.printf("Battery: %d\r\n", batt);
    */
    timer.stop();
    t = timer.read_ms();
    memcpy(accelPayload+sizeof(float)*7, &t, sizeof(t));
    timer.reset();
    ble.updateCharacteristicValue(accelChar.getValueAttribute().getHandle(), accelPayload, sizeof(accelPayload));    //Mod
}