File content as of revision 5:ed9a4f932fcf:

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

 */

#define LOG_LEVEL_DEBUG
#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;

// Interrupt driven ticker to do the sampling
Ticker sampleTicker;

// 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;

// Function called in interrupt driven ticker to handle sampling
static volatile int serviceCount = 0;
void SampleService()
{
    serviceCount++;
    
    return;
    
    // service all channel's state machines
    bool isAnyChannelSampling = false;
    for (int chanIdx = 0; chanIdx < NUM_SAMPLE_CHANNELS; chanIdx++)
    {
        sampleChannels[chanIdx].Service();
        if (sampleChannels[chanIdx].IsSampling())
            isAnyChannelSampling = true;
    }

    if (!isAnyChannelSampling)
    {
        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;                
            }
        }
    }
}
    
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;
//        sampleTicker.detach();
//        sampleTicker.attach_us(&SampleService, sampleIntervalUs);
    }
}

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();
    
    // Start ticker to service the sampling
    sampleTicker.attach_us(&SampleService, sampleIntervalUs);

    // Wait for something to be found
    unsigned int lastPuckDriveTime = 0;
    unsigned int driveLoops = 0;
    while(true)
    {
        // Service the puck
        puck->drive();
        driveLoops++;
        
        // Handle 1 second updates
        if ((intervalTimer.read_ms() - lastPuckDriveTime >= 1000) || (intervalTimer.read_ms() < lastPuckDriveTime))
        {
            lastPuckDriveTime = intervalTimer.read_ms();
            LOG_INFO("%u T%u L%u\n", intervalTimer.read_ms(), serviceCount, driveLoops);
        }
        
        continue;

        // Check for data ready
        for (int chanIdx = 0; chanIdx < NUM_SAMPLE_CHANNELS; chanIdx++)
        {
            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");
            }
        }
    }
}