File content as of revision 3:a155da1cbde3:

/**
Scoring Device - for generic game scoring
Using Puck BLE MBED library from Nordic
Copyright (C) Nodule.io 2014

 */

#define LOG_LEVEL_INFO
#include "Puck.h"
#include "SampleChannel.h"

Puck* puck = &Puck::getPuck();

// Gatt characteristic and service UUIDs
const UUID SCORING_GATT_SERVICE =               stringToUUID("nod.score1.serv ");
const UUID THRESHOLD_GATT_CHARACTERISTIC =      stringToUUID("nod.score1.thres");
const UUID DIVISOR_GATT_CHARACTERISTIC =        stringToUUID("nod.score1.div  ");
const UUID INTERVAL_US_GATT_CHARACTERISTIC =    stringToUUID("nod.score1.intus");

const int NUM_SAMPLE_CHANNELS = 1;

// Sample interval (uS)
uint32_t sampleIntervalUs = 100000;

// Sample Channels
SampleChannel sampleChannels[] =
{
    SampleChannel(P0_1, stringToUUID("nod.score1.samp1"), &logger),
    SampleChannel(P0_2, stringToUUID("nod.score1.samp2"), &logger),
    SampleChannel(P0_3, stringToUUID("nod.score1.samp3"), &logger)    
};

// Timer to avoid repeat sampling
Timer intervalTimer;
int lastTriggerTime = 0;
int lastSampleTime = 0;
const int MIN_MS_BETWEEN_SAMPLES = 2000;

void onThresholdSet(uint8_t* value)
{
    uint16_t threshold = value[0] * 256 + value[1];
    LOG_INFO("Threshold=%d\n", threshold);
    for (int chanIdx = 0; chanIdx < NUM_SAMPLE_CHANNELS; chanIdx++)
        sampleChannels[chanIdx].SetThreshold(threshold);
}

void onDivisorSet(uint8_t* value)
{
    uint16_t divisor = value[0] * 256 + value[1];
    LOG_INFO("Divisor=%d\n", divisor);
    for (int chanIdx = 0; chanIdx < NUM_SAMPLE_CHANNELS; chanIdx++)
        sampleChannels[chanIdx].SetDivisor(divisor);
}

void onIntervalSet(uint8_t* value)
{
    uint32_t intervalUs = (value[0] << 24) + (value[1] << 16) + (value[2] << 8) + value[3];
    LOG_INFO("SampleInterval(uS)=%d\n", intervalUs);
    if (intervalUs <= 1000000)
        sampleIntervalUs = intervalUs;
}

int main(void) 
{
    
    // Set baud rate
    logger.baud(115200);
    
    // Add the Gatt characteristic for samples
    for (int chanIdx = 0; chanIdx < NUM_SAMPLE_CHANNELS; chanIdx++)
    {
        puck->addCharacteristic(
            SCORING_GATT_SERVICE,
            sampleChannels[chanIdx].GetUUID(),
            sampleChannels[chanIdx].GetSamplesLen(),
            GattCharacteristic::BLE_GATT_CHAR_PROPERTIES_READ | GattCharacteristic::BLE_GATT_CHAR_PROPERTIES_NOTIFY);
    }

    // Add the Gatt characteristic for threshold
    puck->addCharacteristic(
            SCORING_GATT_SERVICE,
            THRESHOLD_GATT_CHARACTERISTIC,
            sizeof(uint16_t),
            GattCharacteristic::BLE_GATT_CHAR_PROPERTIES_WRITE);
    puck->onCharacteristicWrite(&THRESHOLD_GATT_CHARACTERISTIC, onThresholdSet);

    // Add the Gatt characteristic for sample divisor
    puck->addCharacteristic(
            SCORING_GATT_SERVICE,
            DIVISOR_GATT_CHARACTERISTIC,
            sizeof(uint16_t),
            GattCharacteristic::BLE_GATT_CHAR_PROPERTIES_WRITE);
    puck->onCharacteristicWrite(&DIVISOR_GATT_CHARACTERISTIC, onDivisorSet);
    
    // Add the Gatt characteristic for sample interval (us)
    puck->addCharacteristic(
            SCORING_GATT_SERVICE,
            INTERVAL_US_GATT_CHARACTERISTIC,
            sizeof(sampleIntervalUs),
            GattCharacteristic::BLE_GATT_CHAR_PROPERTIES_WRITE);
    puck->onCharacteristicWrite(&INTERVAL_US_GATT_CHARACTERISTIC, onIntervalSet);
    
    // Initialize the puck
    puck->init(0xCD01);
    
    // Start timer
    intervalTimer.start();

    // Wait for something to be found
    while(true)
    {
        // service all channel's state machines
        bool isAnyChannelSampling = false;
        for (int chanIdx = 0; chanIdx < NUM_SAMPLE_CHANNELS; chanIdx++)
        {
            sampleChannels[chanIdx].Service();
            if (sampleChannels[chanIdx].AreSamplesReady())
            {
               // Set the value of the characteristic
                puck->updateCharacteristicValue(sampleChannels[chanIdx].GetUUID(), sampleChannels[chanIdx].GetSamples(), sampleChannels[chanIdx].GetSamplesLen());
                sampleChannels[chanIdx].StopSampling();
                LOG_INFO("StopSampling\n");
            }
            if (sampleChannels[chanIdx].IsSampling())
                isAnyChannelSampling = true;
        }

        if (!isAnyChannelSampling)
        {
            // Service the puck
            puck->drive();
        
            int curTimerVal = intervalTimer.read_ms();
            if ((lastTriggerTime < curTimerVal) || (curTimerVal - lastTriggerTime > MIN_MS_BETWEEN_SAMPLES))
            {
                
                // check each channel to see if it's been triggered
                bool anythingTriggered = false;
                for (int chanIdx = 0; chanIdx < NUM_SAMPLE_CHANNELS; chanIdx++)
                {
                    if (sampleChannels[chanIdx].CheckTrigger())
                    {
                        anythingTriggered = true;
                        LOG_INFO("Triggered\n");
                        break;
                    }
                }
                if(anythingTriggered)
                {
                    for (int chanIdx = 0; chanIdx < NUM_SAMPLE_CHANNELS; chanIdx++)
                    {
                        sampleChannels[chanIdx].StartSampling();
                    }
                    // Set timer to disallow repeated readings
                    lastTriggerTime = curTimerVal;                
                }
            }
        }
        else
        {
            wait_us(sampleIntervalUs);
        }
                
        // Inter-sample interval
        //while ((intervalTimer.read_us() - lastSampleTime < sampleIntervalUs) && (intervalTimer.read_us() - lastSampleTime > 0))
        //    wait_us(100);
//        lastSampleTime = intervalTimer.read_us();
//        LOG_INFO("Timer %d\n", intervalTimer.read_ms());
    }
}