ECE 4180 - Final Project Team / Mbed 2 deprecated WalkieTalkie

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Dependencies:   mbed 4DGL-uLCD-SE mbed-rtos nRF24L01P

main.cpp@41:9ed924a1f2e0, 2018-04-29 (annotated)

Committer:
jacksacane
Date:
Sun Apr 29 15:34:20 2018 +0000
Revision:
41:9ed924a1f2e0
Parent:
34:d73e95bbdbed
Parent:
40:4f7d95c68d29
Child:
44:a4f81588fcd5
Adds channel switching, fixes LCD

Who changed what in which revision?

UserRevisionLine numberNew contents of line
drechtmann3 34:d73e95bbdbed 1 #include "uLCD_4DGL.h"
Nurchu 0:c35b54fb9c3c 2 #include "mbed.h"
Nurchu 7:0ac1f1ca8aa6 3 #include "rtos.h"
Nurchu 20:e068469ffb89 4
Nurchu 2:dc046ff72566 5 #include "Microphone.h"
Nurchu 20:e068469ffb89 6 #include "Speaker.h"
drechtmann3 18:e2a8ea6f55d3 7 #include "HUD.h"
Nurchu 20:e068469ffb89 8 #include "nRF24L01P.h"
Nurchu 20:e068469ffb89 9
Nurchu 20:e068469ffb89 10 #include "CircularBuf.h"
Nurchu 20:e068469ffb89 11 #include "CircularBuf.cpp" // Hack to get templates to work
Nurchu 20:e068469ffb89 12
Nurchu 27:08d34e60b6d0 13 // How many times larger the buffer should be
Nurchu 33:5d86c111d9bc 14 #define FIFO_BUFFER_SCALE 250
Nurchu 27:08d34e60b6d0 15 // How maybe bytes to send over RF
Nurchu 27:08d34e60b6d0 16 #define DATA_PACKET_SIZE 32
Nurchu 27:08d34e60b6d0 17 // How quickly to sample the mic / play the speaker
jacksacane 40:4f7d95c68d29 18 #define SAMPLE_PERIOD 1/8000.0
Nurchu 20:e068469ffb89 19
Nurchu 20:e068469ffb89 20
Nurchu 27:08d34e60b6d0 21 Serial pc(USBTX, USBRX);
Nurchu 27:08d34e60b6d0 22 DigitalOut myled1(LED1); // Mic data sent over RF
Nurchu 27:08d34e60b6d0 23 DigitalOut myled2(LED2); // Speaker data recieved over RF
Nurchu 27:08d34e60b6d0 24 DigitalOut myled3(LED3); // Sampled mic / played the speaker
Nurchu 27:08d34e60b6d0 25 DigitalOut myled4(LED4); // Heartbeat
Nurchu 20:e068469ffb89 26
Nurchu 20:e068469ffb89 27 Speaker spkr(p18);
Nurchu 27:08d34e60b6d0 28 Microphone mic(p16);
Nurchu 27:08d34e60b6d0 29
drechtmann3 34:d73e95bbdbed 30 uLCD_4DGL uLCD(p28, p27, p29); // serial tx, serial rx, reset pin;
Nurchu 20:e068469ffb89 31
Nurchu 20:e068469ffb89 32 nRF24L01P my_nrf24l01p(p5, p6, p7, p8, p9, p10); // mosi, miso, sck, csn, ce, irq
Nurchu 27:08d34e60b6d0 33 CircularBuf<uint8_t> txbuff( FIFO_BUFFER_SCALE * DATA_PACKET_SIZE );
Nurchu 27:08d34e60b6d0 34 CircularBuf<uint8_t> rxbuff( FIFO_BUFFER_SCALE * DATA_PACKET_SIZE );
Nurchu 27:08d34e60b6d0 35 Ticker sampler; //10:41 am 4/20
Nurchu 20:e068469ffb89 36
Nurchu 29:0c6f3c0c992a 37 InterruptIn button(p12); //changed DitialIn to InterruptIn at 5:54 4/18/18
jacksacane 41:9ed924a1f2e0 38 BusIn channel(p21, p22, p23, p24, p25);
Nurchu 20:e068469ffb89 39
jacksacane 21:95009b231c1f 40 int rfFreq;
jacksacane 21:95009b231c1f 41 int dataRate;
jacksacane 21:95009b231c1f 42 unsigned long long rxAddr, txAddr;
jacksacane 40:4f7d95c68d29 43 int pipe = 0;
jacksacane 21:95009b231c1f 44
jacksacane 21:95009b231c1f 45 enum operatingMode {
jacksacane 21:95009b231c1f 46 RECEIVE = 0,
jacksacane 21:95009b231c1f 47 TRANSMIT
jacksacane 21:95009b231c1f 48 };
jacksacane 21:95009b231c1f 49
jacksacane 21:95009b231c1f 50 operatingMode mode;
jacksacane 21:95009b231c1f 51
Nurchu 27:08d34e60b6d0 52 // Cheap nonbranching min function
Nurchu 27:08d34e60b6d0 53 int min(int a, int b) {
Nurchu 27:08d34e60b6d0 54 return a * (int)(a <= b) + b * (int)(b < a);
Nurchu 27:08d34e60b6d0 55 }
drechtmann3 1:fc0a2c17e086 56
jacksacane 40:4f7d95c68d29 57 // Sets the channel of the RF device based on which swtiches are flipped
jacksacane 40:4f7d95c68d29 58 // by changing RX/TX pipes
Nurchu 27:08d34e60b6d0 59 // TODO: Make sure we don't have to restart the device or anything to change this
jacksacane 40:4f7d95c68d29 60 void setChannel() {
jacksacane 41:9ed924a1f2e0 61 int oldPipe = pipe;
jacksacane 41:9ed924a1f2e0 62 int width = 5;
jacksacane 40:4f7d95c68d29 63 switch (channel) {
jacksacane 40:4f7d95c68d29 64 case 0: // Channel 0
jacksacane 41:9ed924a1f2e0 65 rxAddr = txAddr = 0xC2C2C2C2C0;
jacksacane 40:4f7d95c68d29 66 pipe = NRF24L01P_PIPE_P0;
jacksacane 41:9ed924a1f2e0 67 if (pipe != oldPipe) {
jacksacane 41:9ed924a1f2e0 68 my_nrf24l01p.setRxAddress(rxAddr, width, pipe);
jacksacane 41:9ed924a1f2e0 69 my_nrf24l01p.setTxAddress(txAddr, width);
jacksacane 41:9ed924a1f2e0 70 }
jacksacane 40:4f7d95c68d29 71 break;
jacksacane 40:4f7d95c68d29 72 case 1: // Channel 1
jacksacane 40:4f7d95c68d29 73 rxAddr = txAddr = 0xC2C2C2C2C1;
jacksacane 40:4f7d95c68d29 74 pipe = NRF24L01P_PIPE_P1;
jacksacane 41:9ed924a1f2e0 75 if (pipe != oldPipe) {
jacksacane 41:9ed924a1f2e0 76 my_nrf24l01p.setRxAddress(rxAddr, width, pipe);
jacksacane 41:9ed924a1f2e0 77 my_nrf24l01p.setTxAddress(txAddr, width);
jacksacane 41:9ed924a1f2e0 78 }
jacksacane 40:4f7d95c68d29 79 break;
jacksacane 40:4f7d95c68d29 80 case 2: // Channel 2
jacksacane 40:4f7d95c68d29 81 rxAddr = txAddr = 0xC2C2C2C2C2;
jacksacane 40:4f7d95c68d29 82 pipe = NRF24L01P_PIPE_P2;
jacksacane 41:9ed924a1f2e0 83 if (pipe != oldPipe) {
jacksacane 41:9ed924a1f2e0 84 my_nrf24l01p.setRxAddress(rxAddr, width, pipe);
jacksacane 41:9ed924a1f2e0 85 my_nrf24l01p.setTxAddress(txAddr, width);
jacksacane 41:9ed924a1f2e0 86 }
jacksacane 40:4f7d95c68d29 87 break;
jacksacane 40:4f7d95c68d29 88 case 4: // Channel 3
jacksacane 40:4f7d95c68d29 89 rxAddr = txAddr = 0xC2C2C2C2C3;
jacksacane 40:4f7d95c68d29 90 pipe = NRF24L01P_PIPE_P3;
jacksacane 41:9ed924a1f2e0 91 if (pipe != oldPipe) {
jacksacane 41:9ed924a1f2e0 92 my_nrf24l01p.setRxAddress(rxAddr, width, pipe);
jacksacane 41:9ed924a1f2e0 93 my_nrf24l01p.setTxAddress(txAddr, width);
jacksacane 41:9ed924a1f2e0 94 }
jacksacane 40:4f7d95c68d29 95 break;
jacksacane 40:4f7d95c68d29 96 case 8: // Channel 4
jacksacane 40:4f7d95c68d29 97 rxAddr = txAddr = 0xC2C2C2C2C4;
jacksacane 40:4f7d95c68d29 98 pipe = NRF24L01P_PIPE_P4;
jacksacane 41:9ed924a1f2e0 99 if (pipe != oldPipe) {
jacksacane 41:9ed924a1f2e0 100 my_nrf24l01p.setRxAddress(rxAddr, width, pipe);
jacksacane 41:9ed924a1f2e0 101 my_nrf24l01p.setTxAddress(txAddr, width);
jacksacane 41:9ed924a1f2e0 102 }
jacksacane 40:4f7d95c68d29 103 break;
jacksacane 40:4f7d95c68d29 104 case 16: // Channel 5
jacksacane 40:4f7d95c68d29 105 rxAddr = txAddr = 0xC2C2C2C2C5;
jacksacane 40:4f7d95c68d29 106 pipe = NRF24L01P_PIPE_P5;
jacksacane 41:9ed924a1f2e0 107 if (pipe != oldPipe) {
jacksacane 41:9ed924a1f2e0 108 my_nrf24l01p.setRxAddress(rxAddr, width, pipe);
jacksacane 41:9ed924a1f2e0 109 my_nrf24l01p.setTxAddress(txAddr, width);
jacksacane 41:9ed924a1f2e0 110 }
jacksacane 40:4f7d95c68d29 111 break;
jacksacane 40:4f7d95c68d29 112 default:
jacksacane 40:4f7d95c68d29 113 break;
jacksacane 40:4f7d95c68d29 114 }
Nurchu 27:08d34e60b6d0 115
jacksacane 40:4f7d95c68d29 116 //pc.printf("Pipe = %d\r\n", pipe);
jacksacane 40:4f7d95c68d29 117
Nurchu 27:08d34e60b6d0 118 // TODO: Don't force it to the default RF frequency
jacksacane 40:4f7d95c68d29 119 //channelNum = 2;
Nurchu 27:08d34e60b6d0 120
jacksacane 40:4f7d95c68d29 121 //my_nrf24l01p.setRfFrequency(channelNum + NRF24L01P_MIN_RF_FREQUENCY);
Nurchu 27:08d34e60b6d0 122 }
drechtmann3 1:fc0a2c17e086 123
Nurchu 27:08d34e60b6d0 124 // Callback interrupt from the button to shift into transmit mode
Nurchu 27:08d34e60b6d0 125 void enterTransmitMode() {
Nurchu 27:08d34e60b6d0 126 mode = TRANSMIT;
Nurchu 33:5d86c111d9bc 127 txbuff.clear();
Nurchu 27:08d34e60b6d0 128 }
drechtmann3 1:fc0a2c17e086 129
Nurchu 27:08d34e60b6d0 130 // Callback interrupt from the button to shift into receive mode
Nurchu 27:08d34e60b6d0 131 void enterRecieveMode() {
Nurchu 27:08d34e60b6d0 132 mode = RECEIVE;
drechtmann3 34:d73e95bbdbed 133 rxbuff.clear();
drechtmann3 10:a8fcfc869fa5 134 }
drechtmann3 1:fc0a2c17e086 135
Nurchu 27:08d34e60b6d0 136 // Called every SAMPLE_PERIOD ms to sample the mic or output data into the speaker
Nurchu 27:08d34e60b6d0 137 void sampleData()
Nurchu 12:efcfe4c0d9f2 138 {
Nurchu 27:08d34e60b6d0 139 // Depending on the mode, only sample the mic or output data to the speaker
Nurchu 27:08d34e60b6d0 140 if (mode == RECEIVE) {
Nurchu 27:08d34e60b6d0 141 // Get speaker sample from buffer
Nurchu 27:08d34e60b6d0 142 // If there is no data in the buffer, it will just output 0 to the write function
Nurchu 27:08d34e60b6d0 143 uint8_t speakerSample = 0;
Nurchu 27:08d34e60b6d0 144 rxbuff.pop(&speakerSample, 1);
Nurchu 27:08d34e60b6d0 145
Nurchu 27:08d34e60b6d0 146 // Output into the actual speaker
Nurchu 27:08d34e60b6d0 147 spkr.write(speakerSample);
Nurchu 27:08d34e60b6d0 148 } else {
Nurchu 27:08d34e60b6d0 149 // Get mic sample and place into buffer
Nurchu 33:5d86c111d9bc 150 uint8_t micSample = mic.getData();
Nurchu 27:08d34e60b6d0 151 txbuff.push(&micSample, 1);
Nurchu 12:efcfe4c0d9f2 152
Nurchu 27:08d34e60b6d0 153 // Make sure the speaker is actually off
Nurchu 27:08d34e60b6d0 154 spkr.turnOff();
Nurchu 27:08d34e60b6d0 155 }
Nurchu 27:08d34e60b6d0 156
Nurchu 27:08d34e60b6d0 157 // TODO: This will have to be removed later on once we actually crank up the sample rate
Nurchu 27:08d34e60b6d0 158 myled3 = !myled3;
Nurchu 27:08d34e60b6d0 159 }
drechtmann3 1:fc0a2c17e086 160
Nurchu 27:08d34e60b6d0 161 // Communicates to the other MBED using RF
Nurchu 27:08d34e60b6d0 162 void commThread()
Nurchu 27:08d34e60b6d0 163 {
Nurchu 27:08d34e60b6d0 164 // We want this in it's own thread so we don't have to worry about the
Nurchu 27:08d34e60b6d0 165 // timings screwing anything else up
Nurchu 27:08d34e60b6d0 166 // It can't be in an interrupt because of that
Nurchu 27:08d34e60b6d0 167 while (true) {
Nurchu 27:08d34e60b6d0 168 // Change what we are sending based on what mode we are in
Nurchu 27:08d34e60b6d0 169 if (mode == RECEIVE) {
Nurchu 27:08d34e60b6d0 170 // Make sure something is there to read
Nurchu 27:08d34e60b6d0 171 if (my_nrf24l01p.readable( NRF24L01P_PIPE_P0 )) {
Nurchu 27:08d34e60b6d0 172 uint8_t spkrPacket[DATA_PACKET_SIZE];
Nurchu 27:08d34e60b6d0 173
Nurchu 27:08d34e60b6d0 174 // Remove entire packet of data from the bus
Nurchu 27:08d34e60b6d0 175 int numReceived = my_nrf24l01p.read( NRF24L01P_PIPE_P0, (char*) spkrPacket, DATA_PACKET_SIZE );
Nurchu 27:08d34e60b6d0 176
Nurchu 27:08d34e60b6d0 177 // Place into buffer to play speaker in another thread
Nurchu 27:08d34e60b6d0 178 // Only place into the buffer the number of bytes received
Nurchu 27:08d34e60b6d0 179 rxbuff.push(spkrPacket, min(DATA_PACKET_SIZE, numReceived));
Nurchu 27:08d34e60b6d0 180
jacksacane 40:4f7d95c68d29 181 //pc.printf("Receiviing....\n\r");
Nurchu 27:08d34e60b6d0 182 myled2 = !myled2;
Nurchu 27:08d34e60b6d0 183 }
Nurchu 27:08d34e60b6d0 184 } else { // mode == TRANSMIT
Nurchu 27:08d34e60b6d0 185 if (txbuff.size() >= DATA_PACKET_SIZE) {
Nurchu 27:08d34e60b6d0 186 uint8_t micPacket[DATA_PACKET_SIZE];
Nurchu 27:08d34e60b6d0 187
Nurchu 27:08d34e60b6d0 188 // Pull an entire packet of data from the mic sample buffer
Nurchu 27:08d34e60b6d0 189 int numPopped = txbuff.pop(micPacket, DATA_PACKET_SIZE);
drechtmann3 34:d73e95bbdbed 190 // rxbuff.push(micPacket, DATA_PACKET_SIZE);
Nurchu 27:08d34e60b6d0 191
Nurchu 27:08d34e60b6d0 192 // Send the entire buffer to the other device
Nurchu 27:08d34e60b6d0 193 // TODO: We just assume that DATA_PACKET_SIZE bytes were popped, this may
Nurchu 27:08d34e60b6d0 194 // not be the case
Nurchu 27:08d34e60b6d0 195 my_nrf24l01p.write( NRF24L01P_PIPE_P0, (char*) micPacket, DATA_PACKET_SIZE );
drechtmann3 34:d73e95bbdbed 196
Nurchu 27:08d34e60b6d0 197 myled1 = !myled1;
Nurchu 27:08d34e60b6d0 198 }
drechtmann3 1:fc0a2c17e086 199 }
Nurchu 27:08d34e60b6d0 200
Nurchu 33:5d86c111d9bc 201 //pc.printf("TX Size %d RX Size%d Mode %d\n\r", txbuff.size(), rxbuff.size(), mode);
Nurchu 27:08d34e60b6d0 202 Thread::yield();
Nurchu 33:5d86c111d9bc 203 //Thread::wait(10);
Nurchu 12:efcfe4c0d9f2 204 }
Nurchu 12:efcfe4c0d9f2 205 }
drechtmann3 1:fc0a2c17e086 206
Nurchu 27:08d34e60b6d0 207 // Displays the current info to the LCD display
jacksacane 21:95009b231c1f 208 void lcdThread()
jacksacane 21:95009b231c1f 209 {
jacksacane 21:95009b231c1f 210 while (1) {
drechtmann3 34:d73e95bbdbed 211 uLCD.locate(0, 0);
jacksacane 41:9ed924a1f2e0 212 uLCD.printf("Freq: %d MHz", rfFreq);
drechtmann3 34:d73e95bbdbed 213 uLCD.locate(0, 2);
jacksacane 41:9ed924a1f2e0 214 uLCD.printf("Rate: %d kbps", dataRate);
drechtmann3 34:d73e95bbdbed 215 uLCD.locate(0, 4);
jacksacane 41:9ed924a1f2e0 216 uLCD.printf("TX: 0x%010llX", txAddr);
drechtmann3 34:d73e95bbdbed 217 uLCD.locate(0, 6);
jacksacane 41:9ed924a1f2e0 218 uLCD.printf("RX: 0x%010llX", rxAddr);
drechtmann3 34:d73e95bbdbed 219 uLCD.locate(0, 8);
Nurchu 27:08d34e60b6d0 220
jacksacane 21:95009b231c1f 221 switch (mode) {
jacksacane 21:95009b231c1f 222 case RECEIVE:
jacksacane 41:9ed924a1f2e0 223 uLCD.printf("Mode: Receiving");
jacksacane 21:95009b231c1f 224 break;
jacksacane 21:95009b231c1f 225 case TRANSMIT:
jacksacane 21:95009b231c1f 226 uLCD.printf("Mode: Transmitting");
jacksacane 21:95009b231c1f 227 break;
jacksacane 21:95009b231c1f 228 }
drechtmann3 34:d73e95bbdbed 229
jacksacane 21:95009b231c1f 230 // Maybe add some graphics too idk
Nurchu 33:5d86c111d9bc 231 Thread::wait(500);
jacksacane 21:95009b231c1f 232 }
jacksacane 21:95009b231c1f 233 }
jacksacane 21:95009b231c1f 234
Nurchu 12:efcfe4c0d9f2 235 int main()
Nurchu 12:efcfe4c0d9f2 236 {
Nurchu 27:08d34e60b6d0 237 Thread lcd;
Nurchu 27:08d34e60b6d0 238 Thread comm;
jacksacane 21:95009b231c1f 239
Nurchu 27:08d34e60b6d0 240 // Set up the nrf24l01p
jacksacane 41:9ed924a1f2e0 241 my_nrf24l01p.setAirDataRate(2000); // 2Mbs
jacksacane 21:95009b231c1f 242 rfFreq = my_nrf24l01p.getRfFrequency();
jacksacane 21:95009b231c1f 243 dataRate = my_nrf24l01p.getAirDataRate();
jacksacane 21:95009b231c1f 244 rxAddr = my_nrf24l01p.getRxAddress();
jacksacane 21:95009b231c1f 245 txAddr = my_nrf24l01p.getTxAddress();
jacksacane 21:95009b231c1f 246
Nurchu 27:08d34e60b6d0 247 my_nrf24l01p.setTransferSize(DATA_PACKET_SIZE);
jacksacane 21:95009b231c1f 248
jacksacane 21:95009b231c1f 249 my_nrf24l01p.setReceiveMode();
jacksacane 21:95009b231c1f 250 my_nrf24l01p.enable();
jacksacane 21:95009b231c1f 251
jacksacane 40:4f7d95c68d29 252 pc.printf( "nRF24L01+ Frequency : %d MHz\r\n", rfFreq );
jacksacane 40:4f7d95c68d29 253 pc.printf( "nRF24L01+ Output power : %d dBm\r\n", my_nrf24l01p.getRfOutputPower() );
jacksacane 40:4f7d95c68d29 254 pc.printf( "nRF24L01+ Data Rate : %d kbps\r\n", my_nrf24l01p.getAirDataRate() );
jacksacane 40:4f7d95c68d29 255 pc.printf( "nRF24L01+ TX Address : 0x%010llX\r\n", txAddr );
jacksacane 40:4f7d95c68d29 256 pc.printf( "nRF24L01+ RX Address : 0x%010llX\r\n", rxAddr );
jacksacane 40:4f7d95c68d29 257
Nurchu 27:08d34e60b6d0 258 pc.printf("Finished starting up....\n\r");
Nurchu 27:08d34e60b6d0 259
jacksacane 22:e835b3490280 260 mode = RECEIVE;
jacksacane 22:e835b3490280 261
jacksacane 21:95009b231c1f 262 // Initialize the uLCD
drechtmann3 34:d73e95bbdbed 263 uLCD.baudrate(3000000);
drechtmann3 34:d73e95bbdbed 264 uLCD.background_color(BLACK);
jacksacane 21:95009b231c1f 265
jacksacane 21:95009b231c1f 266 // Spawn threads
jacksacane 21:95009b231c1f 267 lcd.start(lcdThread);
Nurchu 27:08d34e60b6d0 268 comm.start(commThread);
jacksacane 21:95009b231c1f 269
Nurchu 27:08d34e60b6d0 270 // Setup the button to enter transmit mode when pushed down
Nurchu 27:08d34e60b6d0 271 // and recieve when release
jacksacane 28:9413eb50156d 272 button.mode(PullUp);
Nurchu 31:39d04aedc3e5 273 button.fall(&enterTransmitMode);
Nurchu 31:39d04aedc3e5 274 button.rise(&enterRecieveMode);
Nurchu 27:08d34e60b6d0 275
Nurchu 27:08d34e60b6d0 276 // Setup sampler to sample at a specific frequency
Nurchu 31:39d04aedc3e5 277 sampler.attach(&sampleData, SAMPLE_PERIOD);
Nurchu 27:08d34e60b6d0 278
Nurchu 27:08d34e60b6d0 279 // Heartbeat thread
drechtmann3 1:fc0a2c17e086 280 while (1) {
Nurchu 27:08d34e60b6d0 281 myled4 = !myled4;
jacksacane 40:4f7d95c68d29 282 setChannel(); // Poll the DIP switch and change channels accordingly
Nurchu 27:08d34e60b6d0 283 Thread::wait(100);
Nurchu 12:efcfe4c0d9f2 284 }
Nurchu 12:efcfe4c0d9f2 285 }