File content as of revision 8:150a9cb60210:

/* mbed Microcontroller Library
 * Copyright (c) 2006-2013 ARM Limited
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#include "mbed.h"
#include "BLEDevice.h"
#include "TCS3472_I2C.h"
#include "mpu_hal.h"
I2C i2c(p7, p6);
TCS3472_I2C rgb_sensor(&i2c);

Timer t;

BLEDevice  ble;
DigitalOut led1(p27);
PwmOut led2(p28);
DigitalOut LDOOn(p5);
DigitalOut SoundOn(p2);
AnalogIn   SoundIn(p1);

float sum = 0;
float q[4] = {1.0f, 0.0f, 0.0f, 0.0f};           // vector to hold quaternion
float pitch, yaw, roll;
float deltat = 0.0f;                             // integration interval for both filter schemes


uint32_t sumCount = 0;
char buffer[14];

static volatile bool  triggerSensorPolling = false;

// The Nordic UART Service
static const uint8_t uart_service_uuid[] = {0x6e, 0x40, 0x00, 0x01, 0xb5, 0xa3, 0xf3, 0x93, 0xe0, 0xa9, 0xe5,0x0e, 0x24, 0xdc, 0xca, 0x9e};
static const uint8_t uart_tx_uuid[]   = {0x6e, 0x40, 0x00, 0x02, 0xb5, 0xa3, 0xf3, 0x93, 0xe0, 0xa9, 0xe5,0x0e, 0x24, 0xdc, 0xca, 0x9e};
static const uint8_t uart_rx_uuid[]   = {0x6e, 0x40, 0x00, 0x03, 0xb5, 0xa3, 0xf3, 0x93, 0xe0, 0xa9, 0xe5,0x0e, 0x24, 0xdc, 0xca, 0x9e};
static const uint8_t uart_service_uuid_rev[] = {0x9e, 0xca, 0xdc, 0x24, 0x0e, 0xe5, 0xa9, 0xe0, 0x93, 0xf3, 0xa3, 0xb5, 0x01, 0x00, 0x40, 0x6e};
static const uint16_t uuid16_list[]        = {GattService::UUID_DEVICE_INFORMATION_SERVICE};

static const uint8_t SIZEOF_TX_RX_BUFFER = 128;
uint8_t rxPayload[SIZEOF_TX_RX_BUFFER] = {0,};
uint8_t txPayload[SIZEOF_TX_RX_BUFFER] = {0,};

uint8_t hardwareRevision[] = "0.1";
GattCharacteristic  rxCharacteristic (uart_tx_uuid, rxPayload, 1, SIZEOF_TX_RX_BUFFER,
                                      GattCharacteristic::BLE_GATT_CHAR_PROPERTIES_WRITE | GattCharacteristic::BLE_GATT_CHAR_PROPERTIES_WRITE_WITHOUT_RESPONSE);
GattCharacteristic  txCharacteristic (uart_rx_uuid, txPayload, 1, SIZEOF_TX_RX_BUFFER, GattCharacteristic::BLE_GATT_CHAR_PROPERTIES_NOTIFY);
GattCharacteristic *uartChars[] = {&rxCharacteristic, &txCharacteristic};
GattService         uartService(uart_service_uuid, uartChars, sizeof(uartChars) / sizeof(GattCharacteristic *));

GattCharacteristic  hardwareRevCharacteristic(GattCharacteristic::UUID_HARDWARE_REVISION_STRING_CHAR, hardwareRevision, sizeof(hardwareRevision), sizeof(hardwareRevision), GattCharacteristic::BLE_GATT_CHAR_PROPERTIES_READ);
GattCharacteristic  *deviceInfoChars[] = {&hardwareRevCharacteristic};
GattService         deviceInfoService(GattService::UUID_DEVICE_INFORMATION_SERVICE, deviceInfoChars, sizeof(deviceInfoChars) / sizeof(GattCharacteristic *));

void disconnectionCallback(Gap::Handle_t handle, Gap::DisconnectionReason_t reason)
{
    ble.startAdvertising();
}

void onDataWritten(uint16_t charHandle, const GattCharacteristicWriteCBParams *params)
{
    if (charHandle == rxCharacteristic.getValueAttribute().getHandle()) {
        uint16_t bytesRead = params->len;
        if (bytesRead < sizeof(rxPayload)) {
            memcpy(rxPayload, params->data, bytesRead);
            rxPayload[bytesRead] = 0;
        }
        ble.updateCharacteristicValue(txCharacteristic.getValueAttribute().getHandle(), rxPayload, bytesRead);
    }
}

void periodicCallback(void)
{
    triggerSensorPolling = true;
}

int main(void)
{
    led1 = 1;
    led2 = 1;
    LDOOn = 1;
    SoundOn = 1;
    Ticker ticker;
    i2c.frequency(100000);
    ticker.attach(periodicCallback, 0.3);
    t.start();
    mpu_i2c_dev = &(i2c._i2c);


    ble.init();
    //rgb_sensor.enableWait();
    ble.onDisconnection(disconnectionCallback);
    ble.onDataWritten(onDataWritten);

    /* setup advertising */
    ble.accumulateAdvertisingPayload(GapAdvertisingData::BREDR_NOT_SUPPORTED);
    ble.setAdvertisingType(GapAdvertisingParams::ADV_CONNECTABLE_UNDIRECTED);
    ble.accumulateAdvertisingPayload(GapAdvertisingData::SHORTENED_LOCAL_NAME,
                                     (const uint8_t *)"BLE UART", sizeof("BLE UART") - 1);
    ble.accumulateAdvertisingPayload(GapAdvertisingData::COMPLETE_LIST_128BIT_SERVICE_IDS,
                                     (const uint8_t *)uart_service_uuid_rev, sizeof(uart_service_uuid_rev));
    ble.accumulateScanResponse(GapAdvertisingData::COMPLETE_LIST_16BIT_SERVICE_IDS, (uint8_t *)uuid16_list, sizeof(uuid16_list));
    //ble.accumulateAdvertisingPayload(GapAdvertisingData::HEART_RATE_SENSOR_HEART_RATE_BELT);

    ble.setAdvertisingInterval(160); /* 100ms; in multiples of 0.625ms. */
    ble.addService(uartService);
    ble.addService(deviceInfoService);
    rgb_sensor.enablePowerAndRGBC();
    rgb_sensor.setIntegrationTime( 100 );
    rgb_sensor.setWaitTime(900);
    ble.startAdvertising();


    while (true) {
        if (triggerSensorPolling) {
            triggerSensorPolling = false;
            //led2 = !led2;
            //led1 = !led1; /* Do blinky on LED1 while we're waiting for BLE events */
            char reading[20];
            int rgb_readings[4];
            int len;
            rgb_sensor.getAllColors( rgb_readings );
            rgb_sensor.clearInterrupt();
            char whoami;
            float max = 0.0;
            float min = 1.0;
            float current = 0.0;
            for (int i = 0; i < 20; i++) {
                current = SoundIn;
                if (current > max) max = current;
                if (current < min) min = current;
            }
            len = sprintf((char *)reading, "%d,%d,%d,%d", rgb_readings[0], rgb_readings[1], rgb_readings[2], rgb_readings[3]);
            ble.updateCharacteristicValue(txCharacteristic.getValueAttribute().getHandle(),(uint8_t *) reading, len);
            len = sprintf((char *)reading, "%1.4f", (max - min) * 10.0);
            ble.updateCharacteristicValue(txCharacteristic.getValueAttribute().getHandle(),(uint8_t *) reading, len);

            //whoami = readByte(MPU9250_ADDRESS, WHO_AM_I_MPU9250);
            //len = sprintf((char *)reading, "%d", whoami);
            //ble.updateCharacteristicValue(txCharacteristic.getValueAttribute().getHandle(),(uint8_t *) reading, len);

        } else {
                        //ble.waitForEvent();
            float max = 0.0;
            float min = 1.0;
            float current = 0.0;
            for (int i = 0; i < 100; i++) {
                current = SoundIn;
                if (current > max) max = current;
                if (current < min) min = current;
            }
            if ((max - min) > 0.005) {
                led2 = 1.0 - (max - min)*5.0;
                if ((max - min) > 0.06) {
                    led1 = 0;
                } else {
                    led1 = 1;
                }
            } else {
                led2 = 1.0;
                led1 = 1;
            }
        }
    }
}