main.cpp

00001 /*******************************************************************************
00002 ECE 595 2018 Spring
00003 Project 2
00004 Group 10
00005 last Update 4/22/2018 
00006 memo:   
00007 *******************************************************************************/
00008 
00009 #include "mbed.h"
00010 #include "nRF24L01P.h"
00011 #include "HCSR04.h"
00012  
00013 Serial pc(USBTX, USBRX); // tx, rx
00014 
00015 //nRF24L01P my_nrf24l01p(PTD2, PTD3, PTD1, PTD0, PTC4, PTC12);    // mosi, miso, sck, csn, ce, irq
00016 nRF24L01P my_nrf24l01p(PTD2, PTD3, PTD1, PTC3, PTC4, PTD0); 
00017 DigitalOut myled1(LED_GREEN);
00018 DigitalOut myled2(LED_RED);
00019 
00020 
00021 DigitalIn soundDete(D8);
00022 DigitalIn touch(D4);
00023 DigitalOut buzzer(D3);
00024 DigitalOut Picamera(D2);
00025 
00026 Timer timer;
00027 HCSR04 rangeFinder(D5, D6);
00028 
00029 float range;
00030 float tooClose=10;
00031 int warning = 0;
00032 int newevent =0;
00033 
00034 
00035 
00036 
00037 void blink(),takePic(),detectedsound(),checkrange(),shutter();
00038 int main() {
00039  
00040 // The nRF24L01+ supports transfers from 1 to 32 bytes, but Sparkfun's
00041 //  "Nordic Serial Interface Board" (http://www.sparkfun.com/products/9019)
00042 //  only handles 4 byte transfers in the ATMega code.
00043 #define TRANSFER_SIZE   4
00044  
00045     char txData[TRANSFER_SIZE], rxData[TRANSFER_SIZE];
00046     int txDataCnt = 0;
00047     int rxDataCnt = 0;
00048  
00049     my_nrf24l01p.powerUp();
00050  
00051     // Display the (default) setup of the nRF24L01+ chip
00052     pc.printf( "nRF24L01+ Frequency    : %d MHz\r\n",  my_nrf24l01p.getRfFrequency() );
00053     pc.printf( "nRF24L01+ Output power : %d dBm\r\n",  my_nrf24l01p.getRfOutputPower() );
00054     pc.printf( "nRF24L01+ Data Rate    : %d kbps\r\n", my_nrf24l01p.getAirDataRate() );
00055     pc.printf( "nRF24L01+ TX Address   : 0x%010llX\r\n", my_nrf24l01p.getTxAddress() );
00056     pc.printf( "nRF24L01+ RX Address   : 0x%010llX\r\n", my_nrf24l01p.getRxAddress() );
00057  
00058     pc.printf( "Type keys to test transfers:\r\n  (transfers are grouped into %d characters)\r\n", TRANSFER_SIZE );
00059  
00060     my_nrf24l01p.setTransferSize( TRANSFER_SIZE );
00061  
00062     my_nrf24l01p.setTransmitMode();
00063     my_nrf24l01p.enable();
00064  
00065     while (1) {
00066  
00067        pc.printf("init\n\r");
00068         Picamera = 1;
00069         detectedsound();
00070         checkrange();
00071         if ( newevent != 1){
00072             shutter();
00073         }
00074         if ( warning == 1 ){
00075             blink();
00076             if ( newevent == 1){
00077                 takePic();
00078                 
00079                 newevent =0;
00080             }
00081         }           
00082      
00083  
00084  
00085  
00086         // If we've received anything over the host serial link...
00087         if ( warning == 1 ) {
00088  
00089             // ...add it to the transmit buffer
00090             txData[txDataCnt++] = 'w';
00091             txData[txDataCnt++] = 'w';
00092             txData[txDataCnt++] = 'w';
00093             txData[txDataCnt++] = 'w';
00094             // If the transmit buffer is full
00095             if ( txDataCnt >= sizeof( txData ) ) {
00096  
00097                 // Send the transmitbuffer via the nRF24L01+
00098                 pc.printf("message sent");
00099                 my_nrf24l01p.write( NRF24L01P_PIPE_P0, txData, txDataCnt );
00100  
00101                 txDataCnt = 0;
00102             }
00103  
00104             // Toggle LED1 (to help debug Host -> nRF24L01+ communication)
00105             myled1 = !myled1;
00106         }else{
00107         // ...send safe messages 
00108             txData[txDataCnt++] = 's';
00109             txData[txDataCnt++] = 's';
00110             txData[txDataCnt++] = 's';
00111             txData[txDataCnt++] = 's';
00112             // If the transmit buffer is full
00113             if ( txDataCnt >= sizeof( txData ) ) {
00114  
00115                 // Send the transmitbuffer via the nRF24L01+
00116                 pc.printf("message sent");
00117                 my_nrf24l01p.write( NRF24L01P_PIPE_P0, txData, txDataCnt );
00118  
00119                 txDataCnt = 0;
00120             }
00121         }
00122     }
00123 }
00124 
00125 
00126 
00127 
00128 void blink(){
00129      pc.printf("blink\n\r");
00130      buzzer = 1;
00131      wait(.3);
00132      buzzer = 0;
00133      }
00134      
00135 void takePic(){
00136      pc.printf("take photo\n\r");
00137      Picamera = 0;     //0 to take pic  
00138      wait(.5);
00139      Picamera = 1;     //1 not take pic
00140      pc.printf("finish take photo\n\r");
00141      }
00142 
00143 void detectedsound(){
00144      pc.printf("detecte sound\n\r");
00145      if( soundDete == 1){
00146          if(warning == 0){
00147             pc.printf("sound too high\n\r");
00148             warning = 1;
00149             newevent = 1;
00150             }
00151          }
00152     }
00153      
00154 void checkrange(){
00155         pc.printf("start check range\n\r");
00156         timer.reset();
00157         timer.start();
00158         rangeFinder.startMeasurement();
00159         while(!rangeFinder.isNewDataReady()){
00160             }
00161         range = rangeFinder.getDistance_cm();
00162         pc.printf("range = %5.1f cm\n\r", range);
00163         if ( range < tooClose ){
00164             pc.printf("too close\n\r");
00165             if(warning == 0){
00166                warning = 1;
00167                newevent = 1;
00168                }
00169             }
00170         else{
00171             if (soundDete == 0 & range>=tooClose){
00172                 pc.printf("not too close, clear warning\n\r");
00173                 warning = 0;
00174                 }
00175             }
00176         timer.stop();
00177         wait_ms(500-timer.read_ms());     
00178 }
00179 
00180 void  shutter()
00181     {
00182     if ( touch == 1){
00183         pc.printf("shutter\n\r");
00184         takePic();
00185         }
00186     }