Group 3_ESE519 / Mbed 2 deprecated lab5-remote

multihop protocol

Dependencies:   mbed

remote.cpp@4:024e613151a5, 2015-11-10 (annotated)

Committer:
mfrede
Date:
Tue Nov 10 23:09:18 2015 +0000
Revision:
4:024e613151a5
Parent:
3:1b37d57a4e41
Child:
5:387b2ebf6b91
Update with new packet information

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mfrede 1:019a3be50b96 1 #include "mbed.h"
mfrede 1:019a3be50b96 2 #include "MRF24J40.h"
mfrede 1:019a3be50b96 3 #include <string>
mfrede 2:9365aaf34637 4 #include "packet.h"
mfrede 1:019a3be50b96 5
mfrede 3:1b37d57a4e41 6 //define a node number
mfrede 3:1b37d57a4e41 7 #define NODE 2
mfrede 3:1b37d57a4e41 8
mfrede 3:1b37d57a4e41 9 // RF tranceiver to link with gateway.
mfrede 1:019a3be50b96 10 MRF24J40 mrf(p11, p12, p13, p14, p21);
mfrede 1:019a3be50b96 11
mfrede 1:019a3be50b96 12 // LEDs you can treat these as variables (led2 = 1 will turn led2 on!)
mfrede 1:019a3be50b96 13 DigitalOut led1(LED1);
mfrede 1:019a3be50b96 14 DigitalOut led2(LED2);
mfrede 1:019a3be50b96 15 DigitalOut led3(LED3);
mfrede 1:019a3be50b96 16 DigitalOut led4(LED4);
mfrede 1:019a3be50b96 17
mfrede 1:019a3be50b96 18 // Timer
mfrede 1:019a3be50b96 19 Timer timer;
mfrede 1:019a3be50b96 20
mfrede 1:019a3be50b96 21 // Serial port for showing RX data.
mfrede 1:019a3be50b96 22 Serial pc(USBTX, USBRX);
mfrede 1:019a3be50b96 23
mfrede 1:019a3be50b96 24 // Used for sending and receiving
mfrede 1:019a3be50b96 25 char txBuffer[128];
mfrede 1:019a3be50b96 26 char rxBuffer[128];
mfrede 1:019a3be50b96 27 int rxLen;
mfrede 1:019a3be50b96 28
mfrede 4:024e613151a5 29 packet buffer;
mfrede 4:024e613151a5 30
mfrede 1:019a3be50b96 31 //***************** Do not change these methods (please) *****************//
mfrede 1:019a3be50b96 32
mfrede 1:019a3be50b96 33 /**
mfrede 1:019a3be50b96 34 * Receive data from the MRF24J40.
mfrede 1:019a3be50b96 35 *
mfrede 1:019a3be50b96 36 * @param data A pointer to a char array to hold the data
mfrede 1:019a3be50b96 37 * @param maxLength The max amount of data to read.
mfrede 1:019a3be50b96 38 */
mfrede 4:024e613151a5 39 int rf_receive(packet *data, uint8_t maxLength)
mfrede 1:019a3be50b96 40 {
mfrede 1:019a3be50b96 41 uint8_t len = mrf.Receive((uint8_t *)data, maxLength);
mfrede 4:024e613151a5 42
mfrede 1:019a3be50b96 43
mfrede 4:024e613151a5 44 if(len > 4) {
mfrede 4:024e613151a5 45 //valid data with full header
mfrede 4:024e613151a5 46 if(data.to != NODE)
mfrede 4:024e613151a5 47 {
mfrede 4:024e613151a5 48 //throw out the data
mfrede 4:024e613151a5 49 return 0;
mfrede 1:019a3be50b96 50 }
mfrede 4:024e613151a5 51 pc.printf("Received data for us from node: %d\r\n",data.from);
mfrede 4:024e613151a5 52
mfrede 1:019a3be50b96 53 //pc.printf("Received: %s length:%d\r\n", data, ((int)len)-10);
mfrede 1:019a3be50b96 54 }
mfrede 4:024e613151a5 55
mfrede 4:024e613151a5 56
mfrede 4:024e613151a5 57 return ((int)len);
mfrede 1:019a3be50b96 58 }
mfrede 1:019a3be50b96 59
mfrede 1:019a3be50b96 60 /**
mfrede 1:019a3be50b96 61 * Send data to another MRF24J40.
mfrede 1:019a3be50b96 62 *
mfrede 1:019a3be50b96 63 * @param data The string to send
mfrede 1:019a3be50b96 64 * @param maxLength The length of the data to send.
mfrede 1:019a3be50b96 65 * If you are sending a null-terminated string you can pass strlen(data)+1
mfrede 1:019a3be50b96 66 */
mfrede 4:024e613151a5 67 void rf_send(packet *data, uint8_t len)
mfrede 1:019a3be50b96 68 {
mfrede 1:019a3be50b96 69 uint8_t *send_buf = (uint8_t *) malloc( sizeof(uint8_t) * (len+8) );
mfrede 1:019a3be50b96 70
mfrede 1:019a3be50b96 71 for(uint8_t i = 0; i < len+8; i++) {
mfrede 1:019a3be50b96 72 //prepend the 8-byte header
mfrede 1:019a3be50b96 73 send_buf[i] = (i<8) ? header[i] : data[i-8];
mfrede 1:019a3be50b96 74 }
mfrede 1:019a3be50b96 75 //pc.printf("Sent: %s\r\n", send_buf+8);
mfrede 1:019a3be50b96 76
mfrede 1:019a3be50b96 77 mrf.Send(send_buf, len+8);
mfrede 1:019a3be50b96 78 free(send_buf);
mfrede 1:019a3be50b96 79 }
mfrede 1:019a3be50b96 80
mfrede 1:019a3be50b96 81
mfrede 1:019a3be50b96 82 //***************** You can start coding here *****************//
mfrede 1:019a3be50b96 83
mfrede 1:019a3be50b96 84 int main (void)
mfrede 1:019a3be50b96 85 {
mfrede 1:019a3be50b96 86 //Set the channel of the slave
mfrede 1:019a3be50b96 87 uint8_t channel = 15;
mfrede 1:019a3be50b96 88 mrf.SetChannel(channel);
mfrede 1:019a3be50b96 89
mfrede 1:019a3be50b96 90 //Analog input
mfrede 1:019a3be50b96 91 AnalogIn light(p20); //Analog input from the light sensor
mfrede 1:019a3be50b96 92 AnalogIn temp(p19); //Analog input from the temp snesor
mfrede 1:019a3be50b96 93
mfrede 1:019a3be50b96 94 //Variable to read values
mfrede 1:019a3be50b96 95 float val = 1;
mfrede 1:019a3be50b96 96 int begin = 0;
mfrede 1:019a3be50b96 97 int end = 0;
mfrede 1:019a3be50b96 98 int current = 0;
mfrede 1:019a3be50b96 99
mfrede 1:019a3be50b96 100 //Start the timer
mfrede 1:019a3be50b96 101 timer.start();
mfrede 1:019a3be50b96 102
mfrede 1:019a3be50b96 103 while(true) {
mfrede 1:019a3be50b96 104
mfrede 1:019a3be50b96 105 //Try to receive some data
mfrede 1:019a3be50b96 106 rxLen = rf_receive(rxBuffer, 128);
mfrede 1:019a3be50b96 107
mfrede 1:019a3be50b96 108 if(rxLen > 0) {
mfrede 1:019a3be50b96 109
mfrede 1:019a3be50b96 110 //Switch on the Led and start the timer
mfrede 1:019a3be50b96 111 printf("Received input\n");
mfrede 1:019a3be50b96 112 led1 = 1;
mfrede 1:019a3be50b96 113 begin = timer.read_ms();
mfrede 1:019a3be50b96 114 end = begin + 1000;
mfrede 1:019a3be50b96 115 strcpy(txBuffer, "n");
mfrede 1:019a3be50b96 116
mfrede 1:019a3be50b96 117
mfrede 1:019a3be50b96 118 while(current < end) {
mfrede 1:019a3be50b96 119
mfrede 1:019a3be50b96 120 current = timer.read_ms();
mfrede 1:019a3be50b96 121 val = button.read();
mfrede 1:019a3be50b96 122 //printf("val: %f\r\n",val);
mfrede 1:019a3be50b96 123 if(val < 0.1f ) {
mfrede 1:019a3be50b96 124 strcpy(txBuffer, "y"); ///send "y" if press
mfrede 1:019a3be50b96 125 break;
mfrede 1:019a3be50b96 126 }
mfrede 1:019a3be50b96 127
mfrede 1:019a3be50b96 128 }//end of 1 sec while loop
mfrede 1:019a3be50b96 129
mfrede 1:019a3be50b96 130 led1 = 0; //Switch of the Led
mfrede 1:019a3be50b96 131 rf_send(txBuffer, strlen(txBuffer) + 1); // send data
mfrede 1:019a3be50b96 132 pc.printf("Sent: %s\r\n", txBuffer);
mfrede 1:019a3be50b96 133
mfrede 1:019a3be50b96 134 }//end of if loop
mfrede 1:019a3be50b96 135
mfrede 1:019a3be50b96 136
mfrede 1:019a3be50b96 137
mfrede 1:019a3be50b96 138 }// end of while true
mfrede 1:019a3be50b96 139
mfrede 1:019a3be50b96 140 }//end of main