File content as of revision 2:fb75a6c7a0de:

/*******************************************************************************
ECE 595 2018 Spring
Project 2
Group 10
last Update 4/22/2018 
memo:   
*******************************************************************************/

#include "mbed.h"
#include "nRF24L01P.h"
#include "HCSR04.h"
 
Serial pc(USBTX, USBRX); // tx, rx

//nRF24L01P my_nrf24l01p(PTD2, PTD3, PTD1, PTD0, PTC4, PTC12);    // mosi, miso, sck, csn, ce, irq
nRF24L01P my_nrf24l01p(PTD2, PTD3, PTD1, PTC3, PTC4, PTD0); 
DigitalOut myled1(LED_GREEN);
DigitalOut myled2(LED_RED);


DigitalIn soundDete(D8);
DigitalIn touch(D4);
DigitalOut buzzer(D3);
DigitalOut Picamera(D2);

Timer timer;
HCSR04 rangeFinder(D5, D6);

float range;
float tooClose=10;
int warning = 0;
int newevent =0;




void blink(),takePic(),detectedsound(),checkrange(),shutter();
int main() {
 
// The nRF24L01+ supports transfers from 1 to 32 bytes, but Sparkfun's
//  "Nordic Serial Interface Board" (http://www.sparkfun.com/products/9019)
//  only handles 4 byte transfers in the ATMega code.
#define TRANSFER_SIZE   4
 
    char txData[TRANSFER_SIZE], rxData[TRANSFER_SIZE];
    int txDataCnt = 0;
    int rxDataCnt = 0;
 
    my_nrf24l01p.powerUp();
 
    // Display the (default) setup of the nRF24L01+ chip
    pc.printf( "nRF24L01+ Frequency    : %d MHz\r\n",  my_nrf24l01p.getRfFrequency() );
    pc.printf( "nRF24L01+ Output power : %d dBm\r\n",  my_nrf24l01p.getRfOutputPower() );
    pc.printf( "nRF24L01+ Data Rate    : %d kbps\r\n", my_nrf24l01p.getAirDataRate() );
    pc.printf( "nRF24L01+ TX Address   : 0x%010llX\r\n", my_nrf24l01p.getTxAddress() );
    pc.printf( "nRF24L01+ RX Address   : 0x%010llX\r\n", my_nrf24l01p.getRxAddress() );
 
    pc.printf( "Type keys to test transfers:\r\n  (transfers are grouped into %d characters)\r\n", TRANSFER_SIZE );
 
    my_nrf24l01p.setTransferSize( TRANSFER_SIZE );
 
    my_nrf24l01p.setTransmitMode();
    my_nrf24l01p.enable();
 
    while (1) {
 
       pc.printf("init\n\r");
        Picamera = 1;
        detectedsound();
        checkrange();
        if ( newevent != 1){
            shutter();
        }
        if ( warning == 1 ){
            blink();
            if ( newevent == 1){
                takePic();
                
                newevent =0;
            }
        }           
     
 
 
 
        // If we've received anything over the host serial link...
        if ( warning == 1 ) {
 
            // ...add it to the transmit buffer
            txData[txDataCnt++] = 'w';
            txData[txDataCnt++] = 'w';
            txData[txDataCnt++] = 'w';
            txData[txDataCnt++] = 'w';
            // If the transmit buffer is full
            if ( txDataCnt >= sizeof( txData ) ) {
 
                // Send the transmitbuffer via the nRF24L01+
                pc.printf("message sent");
                my_nrf24l01p.write( NRF24L01P_PIPE_P0, txData, txDataCnt );
 
                txDataCnt = 0;
            }
 
            // Toggle LED1 (to help debug Host -> nRF24L01+ communication)
            myled1 = !myled1;
        }else{
        // ...send safe messages 
            txData[txDataCnt++] = 's';
            txData[txDataCnt++] = 's';
            txData[txDataCnt++] = 's';
            txData[txDataCnt++] = 's';
            // If the transmit buffer is full
            if ( txDataCnt >= sizeof( txData ) ) {
 
                // Send the transmitbuffer via the nRF24L01+
                pc.printf("message sent");
                my_nrf24l01p.write( NRF24L01P_PIPE_P0, txData, txDataCnt );
 
                txDataCnt = 0;
            }
        }
    }
}




void blink(){
     pc.printf("blink\n\r");
     buzzer = 1;
     wait(.3);
     buzzer = 0;
     }
     
void takePic(){
     pc.printf("take photo\n\r");
     Picamera = 0;     //0 to take pic  
     wait(.5);
     Picamera = 1;     //1 not take pic
     pc.printf("finish take photo\n\r");
     }

void detectedsound(){
     pc.printf("detecte sound\n\r");
     if( soundDete == 1){
         if(warning == 0){
            pc.printf("sound too high\n\r");
            warning = 1;
            newevent = 1;
            }
         }
    }
     
void checkrange(){
        pc.printf("start check range\n\r");
        timer.reset();
        timer.start();
        rangeFinder.startMeasurement();
        while(!rangeFinder.isNewDataReady()){
            }
        range = rangeFinder.getDistance_cm();
        pc.printf("range = %5.1f cm\n\r", range);
        if ( range < tooClose ){
            pc.printf("too close\n\r");
            if(warning == 0){
               warning = 1;
               newevent = 1;
               }
            }
        else{
            if (soundDete == 0 & range>=tooClose){
                pc.printf("not too close, clear warning\n\r");
                warning = 0;
                }
            }
        timer.stop();
        wait_ms(500-timer.read_ms());     
}

void  shutter()
    {
    if ( touch == 1){
        pc.printf("shutter\n\r");
        takePic();
        }
    }