Group 3_ESE519 / Mbed 2 deprecated lab5-remote

multihop protocol

Dependencies:   mbed

remote.cpp@6:1fe84e29b486, 2015-11-11 (annotated)

Committer:
mfrede
Date:
Wed Nov 11 00:46:15 2015 +0000
Revision:
6:1fe84e29b486
Parent:
5:387b2ebf6b91
Child:
7:67b40640ddb6
added headers back in...not sure if we need them

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 5:387b2ebf6b91 25 //char txBuffer[128];
mfrede 5:387b2ebf6b91 26 //char rxBuffer[128];
mfrede 1:019a3be50b96 27 int rxLen;
mfrede 5:387b2ebf6b91 28 packet* txBuffer;
mfrede 5:387b2ebf6b91 29 packet* rxBuffer;
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 6:1fe84e29b486 42 uint8_t header[8]= {1, 8, 0, 0xA1, 0xB2, 0xC3, 0xD4, 0x00};
mfrede 1:019a3be50b96 43
mfrede 6:1fe84e29b486 44 if(len > 10) {
mfrede 6:1fe84e29b486 45 pc.printf("got data\r\n");
mfrede 6:1fe84e29b486 46 //Remove the header and footer of the message
mfrede 6:1fe84e29b486 47 for(uint8_t i = 0; i < len-2; i++) {
mfrede 6:1fe84e29b486 48 if(i<8) {
mfrede 6:1fe84e29b486 49 //Make sure our header is valid first
mfrede 6:1fe84e29b486 50 if(((uint8_t *)data)[i] != header[i])
mfrede 6:1fe84e29b486 51 return 0;
mfrede 6:1fe84e29b486 52 } else {
mfrede 6:1fe84e29b486 53 ((uint8_t *)data)[i-8] = ((uint8_t *)data)[i];
mfrede 6:1fe84e29b486 54 }
mfrede 6:1fe84e29b486 55 }
mfrede 6:1fe84e29b486 56 len = len - 8;
mfrede 6:1fe84e29b486 57 }
mfrede 4:024e613151a5 58 if(len > 4) {
mfrede 4:024e613151a5 59 //valid data with full header
mfrede 5:387b2ebf6b91 60 if(data->to != NODE)
mfrede 4:024e613151a5 61 {
mfrede 4:024e613151a5 62 //throw out the data
mfrede 4:024e613151a5 63 return 0;
mfrede 1:019a3be50b96 64 }
mfrede 5:387b2ebf6b91 65 pc.printf("Received data for us from node: %d TTL: %d\r\n",data->from,data->TTL);
mfrede 5:387b2ebf6b91 66
mfrede 5:387b2ebf6b91 67 switch(data->TYPE)
mfrede 5:387b2ebf6b91 68 {
mfrede 5:387b2ebf6b91 69 case HELLO_TYPE:
mfrede 5:387b2ebf6b91 70 pc.printf("HELLO\r\n");
mfrede 5:387b2ebf6b91 71 }
mfrede 4:024e613151a5 72
mfrede 1:019a3be50b96 73 //pc.printf("Received: %s length:%d\r\n", data, ((int)len)-10);
mfrede 1:019a3be50b96 74 }
mfrede 4:024e613151a5 75
mfrede 4:024e613151a5 76
mfrede 4:024e613151a5 77 return ((int)len);
mfrede 1:019a3be50b96 78 }
mfrede 1:019a3be50b96 79
mfrede 1:019a3be50b96 80 /**
mfrede 1:019a3be50b96 81 * Send data to another MRF24J40.
mfrede 1:019a3be50b96 82 *
mfrede 1:019a3be50b96 83 * @param data The string to send
mfrede 1:019a3be50b96 84 * @param maxLength The length of the data to send.
mfrede 1:019a3be50b96 85 * If you are sending a null-terminated string you can pass strlen(data)+1
mfrede 1:019a3be50b96 86 */
mfrede 4:024e613151a5 87 void rf_send(packet *data, uint8_t len)
mfrede 1:019a3be50b96 88 {
mfrede 1:019a3be50b96 89
mfrede 5:387b2ebf6b91 90 data->from = NODE;
mfrede 5:387b2ebf6b91 91
mfrede 1:019a3be50b96 92
mfrede 5:387b2ebf6b91 93 mrf.Send((uint8_t *) data, (len*4)+4);
mfrede 1:019a3be50b96 94 }
mfrede 1:019a3be50b96 95
mfrede 1:019a3be50b96 96
mfrede 1:019a3be50b96 97 //***************** You can start coding here *****************//
mfrede 1:019a3be50b96 98
mfrede 1:019a3be50b96 99 int main (void)
mfrede 1:019a3be50b96 100 {
mfrede 1:019a3be50b96 101 //Set the channel of the slave
mfrede 1:019a3be50b96 102 uint8_t channel = 15;
mfrede 1:019a3be50b96 103 mrf.SetChannel(channel);
mfrede 1:019a3be50b96 104
mfrede 1:019a3be50b96 105 //Analog input
mfrede 1:019a3be50b96 106 AnalogIn light(p20); //Analog input from the light sensor
mfrede 1:019a3be50b96 107 AnalogIn temp(p19); //Analog input from the temp snesor
mfrede 1:019a3be50b96 108
mfrede 1:019a3be50b96 109 //Variable to read values
mfrede 1:019a3be50b96 110 float val = 1;
mfrede 1:019a3be50b96 111 int begin = 0;
mfrede 1:019a3be50b96 112 int end = 0;
mfrede 1:019a3be50b96 113 int current = 0;
mfrede 1:019a3be50b96 114
mfrede 1:019a3be50b96 115 //Start the timer
mfrede 1:019a3be50b96 116 timer.start();
mfrede 1:019a3be50b96 117
mfrede 1:019a3be50b96 118 while(true) {
mfrede 1:019a3be50b96 119
mfrede 1:019a3be50b96 120 //Try to receive some data
mfrede 6:1fe84e29b486 121 rxLen = rf_receive(rxBuffer, 128);
mfrede 1:019a3be50b96 122
mfrede 1:019a3be50b96 123 if(rxLen > 0) {
mfrede 1:019a3be50b96 124
mfrede 1:019a3be50b96 125 //Switch on the Led and start the timer
mfrede 1:019a3be50b96 126 printf("Received input\n");
mfrede 1:019a3be50b96 127 led1 = 1;
mfrede 1:019a3be50b96 128 begin = timer.read_ms();
mfrede 1:019a3be50b96 129 end = begin + 1000;
mfrede 5:387b2ebf6b91 130 //strcpy(txBuffer, "n");
mfrede 1:019a3be50b96 131
mfrede 1:019a3be50b96 132
mfrede 1:019a3be50b96 133 while(current < end) {
mfrede 1:019a3be50b96 134
mfrede 1:019a3be50b96 135 current = timer.read_ms();
mfrede 5:387b2ebf6b91 136 // val = button.read();
mfrede 5:387b2ebf6b91 137 // //printf("val: %f\r\n",val);
mfrede 5:387b2ebf6b91 138 // if(val < 0.1f ) {
mfrede 5:387b2ebf6b91 139 // strcpy(txBuffer, "y"); ///send "y" if press
mfrede 5:387b2ebf6b91 140 // break;
mfrede 5:387b2ebf6b91 141 // }
mfrede 1:019a3be50b96 142
mfrede 1:019a3be50b96 143 }//end of 1 sec while loop
mfrede 1:019a3be50b96 144
mfrede 1:019a3be50b96 145 led1 = 0; //Switch of the Led
mfrede 5:387b2ebf6b91 146 // rf_send(txBuffer, strlen(txBuffer) + 1); // send data
mfrede 1:019a3be50b96 147 pc.printf("Sent: %s\r\n", txBuffer);
mfrede 1:019a3be50b96 148
mfrede 1:019a3be50b96 149 }//end of if loop
mfrede 1:019a3be50b96 150
mfrede 1:019a3be50b96 151
mfrede 1:019a3be50b96 152
mfrede 1:019a3be50b96 153 }// end of while true
mfrede 1:019a3be50b96 154
mfrede 1:019a3be50b96 155 }//end of main