prithvi ganesh / Mbed 2 deprecated ESE350-Whack-a-Mole_slave

whack a mole slave node

Dependencies:   mbed

Fork of ESE350-Whack-a-Mole by Eric Berdinis

whack_slave.cpp@1:3ead502a934a, 2015-10-17 (annotated)

Committer:
prithviganeshk
Date:
Sat Oct 17 23:05:52 2015 +0000
Revision:
1:3ead502a934a
Child:
2:da2bbdea23a3
slave code

Who changed what in which revision?

UserRevisionLine numberNew contents of line
prithviganeshk 1:3ead502a934a 1 #include "mbed.h"
prithviganeshk 1:3ead502a934a 2 #include "MRF24J40.h"
prithviganeshk 1:3ead502a934a 3 #include <string>
prithviganeshk 1:3ead502a934a 4
prithviganeshk 1:3ead502a934a 5 // RF tranceiver to link with handheld.
prithviganeshk 1:3ead502a934a 6 MRF24J40 mrf(p11, p12, p13, p14, p21);
prithviganeshk 1:3ead502a934a 7
prithviganeshk 1:3ead502a934a 8 // LEDs you can treat these as variables (led2 = 1 will turn led2 on!)
prithviganeshk 1:3ead502a934a 9 DigitalOut led1(LED1);
prithviganeshk 1:3ead502a934a 10 DigitalOut led2(LED2);
prithviganeshk 1:3ead502a934a 11 DigitalOut led3(LED3);
prithviganeshk 1:3ead502a934a 12 DigitalOut led4(LED4);
prithviganeshk 1:3ead502a934a 13
prithviganeshk 1:3ead502a934a 14 // Timer
prithviganeshk 1:3ead502a934a 15 Timer timer;
prithviganeshk 1:3ead502a934a 16
prithviganeshk 1:3ead502a934a 17 // Serial port for showing RX data.
prithviganeshk 1:3ead502a934a 18 Serial pc(USBTX, USBRX);
prithviganeshk 1:3ead502a934a 19
prithviganeshk 1:3ead502a934a 20 // Used for sending and receiving
prithviganeshk 1:3ead502a934a 21 char txBuffer[128];
prithviganeshk 1:3ead502a934a 22 char rxBuffer[128];
prithviganeshk 1:3ead502a934a 23 int rxLen;
prithviganeshk 1:3ead502a934a 24
prithviganeshk 1:3ead502a934a 25 //***************** Do not change these methods (please) *****************//
prithviganeshk 1:3ead502a934a 26
prithviganeshk 1:3ead502a934a 27 /**
prithviganeshk 1:3ead502a934a 28 * Receive data from the MRF24J40.
prithviganeshk 1:3ead502a934a 29 *
prithviganeshk 1:3ead502a934a 30 * @param data A pointer to a char array to hold the data
prithviganeshk 1:3ead502a934a 31 * @param maxLength The max amount of data to read.
prithviganeshk 1:3ead502a934a 32 */
prithviganeshk 1:3ead502a934a 33 int rf_receive(char *data, uint8_t maxLength)
prithviganeshk 1:3ead502a934a 34 {
prithviganeshk 1:3ead502a934a 35 uint8_t len = mrf.Receive((uint8_t *)data, maxLength);
prithviganeshk 1:3ead502a934a 36 uint8_t header[8]= {1, 8, 0, 0xA1, 0xB2, 0xC3, 0xD4, 0x00};
prithviganeshk 1:3ead502a934a 37
prithviganeshk 1:3ead502a934a 38 if(len > 10) {
prithviganeshk 1:3ead502a934a 39 //Remove the header and footer of the message
prithviganeshk 1:3ead502a934a 40 for(uint8_t i = 0; i < len-2; i++) {
prithviganeshk 1:3ead502a934a 41 if(i<8) {
prithviganeshk 1:3ead502a934a 42 //Make sure our header is valid first
prithviganeshk 1:3ead502a934a 43 if(data[i] != header[i])
prithviganeshk 1:3ead502a934a 44 return 0;
prithviganeshk 1:3ead502a934a 45 } else {
prithviganeshk 1:3ead502a934a 46 data[i-8] = data[i];
prithviganeshk 1:3ead502a934a 47 }
prithviganeshk 1:3ead502a934a 48 }
prithviganeshk 1:3ead502a934a 49
prithviganeshk 1:3ead502a934a 50 //pc.printf("Received: %s length:%d\r\n", data, ((int)len)-10);
prithviganeshk 1:3ead502a934a 51 }
prithviganeshk 1:3ead502a934a 52 return ((int)len)-10;
prithviganeshk 1:3ead502a934a 53 }
prithviganeshk 1:3ead502a934a 54
prithviganeshk 1:3ead502a934a 55 /**
prithviganeshk 1:3ead502a934a 56 * Send data to another MRF24J40.
prithviganeshk 1:3ead502a934a 57 *
prithviganeshk 1:3ead502a934a 58 * @param data The string to send
prithviganeshk 1:3ead502a934a 59 * @param maxLength The length of the data to send.
prithviganeshk 1:3ead502a934a 60 * If you are sending a null-terminated string you can pass strlen(data)+1
prithviganeshk 1:3ead502a934a 61 */
prithviganeshk 1:3ead502a934a 62 void rf_send(char *data, uint8_t len)
prithviganeshk 1:3ead502a934a 63 {
prithviganeshk 1:3ead502a934a 64 //We need to prepend the message with a valid ZigBee header
prithviganeshk 1:3ead502a934a 65 uint8_t header[8]= {1, 8, 0, 0xA1, 0xB2, 0xC3, 0xD4, 0x00};
prithviganeshk 1:3ead502a934a 66 uint8_t *send_buf = (uint8_t *) malloc( sizeof(uint8_t) * (len+8) );
prithviganeshk 1:3ead502a934a 67
prithviganeshk 1:3ead502a934a 68 for(uint8_t i = 0; i < len+8; i++) {
prithviganeshk 1:3ead502a934a 69 //prepend the 8-byte header
prithviganeshk 1:3ead502a934a 70 send_buf[i] = (i<8) ? header[i] : data[i-8];
prithviganeshk 1:3ead502a934a 71 }
prithviganeshk 1:3ead502a934a 72 //pc.printf("Sent: %s\r\n", send_buf+8);
prithviganeshk 1:3ead502a934a 73
prithviganeshk 1:3ead502a934a 74 mrf.Send(send_buf, len+8);
prithviganeshk 1:3ead502a934a 75 free(send_buf);
prithviganeshk 1:3ead502a934a 76 }
prithviganeshk 1:3ead502a934a 77
prithviganeshk 1:3ead502a934a 78
prithviganeshk 1:3ead502a934a 79 //***************** You can start coding here *****************//
prithviganeshk 1:3ead502a934a 80
prithviganeshk 1:3ead502a934a 81 int main (void)
prithviganeshk 1:3ead502a934a 82 {
prithviganeshk 1:3ead502a934a 83 //Set the channel of the slave
prithviganeshk 1:3ead502a934a 84 uint8_t channel = 15;
prithviganeshk 1:3ead502a934a 85 mrf.SetChannel(channel);
prithviganeshk 1:3ead502a934a 86
prithviganeshk 1:3ead502a934a 87 //Analog input
prithviganeshk 1:3ead502a934a 88 AnalogIn button(p20); //Analog input from the light sensor
prithviganeshk 1:3ead502a934a 89
prithviganeshk 1:3ead502a934a 90 //Variable to read values
prithviganeshk 1:3ead502a934a 91 float val = 1;
prithviganeshk 1:3ead502a934a 92 int begin = 0;
prithviganeshk 1:3ead502a934a 93 int end = 0;
prithviganeshk 1:3ead502a934a 94 int current = 0;
prithviganeshk 1:3ead502a934a 95
prithviganeshk 1:3ead502a934a 96 //Start the timer
prithviganeshk 1:3ead502a934a 97 timer.start();
prithviganeshk 1:3ead502a934a 98
prithviganeshk 1:3ead502a934a 99 while(true) {
prithviganeshk 1:3ead502a934a 100
prithviganeshk 1:3ead502a934a 101 //Try to receive some data
prithviganeshk 1:3ead502a934a 102 rxLen = rf_receive(rxBuffer, 128);
prithviganeshk 1:3ead502a934a 103
prithviganeshk 1:3ead502a934a 104 if(rxLen > 0) {
prithviganeshk 1:3ead502a934a 105
prithviganeshk 1:3ead502a934a 106 //Switch on the Led and start the timer
prithviganeshk 1:3ead502a934a 107 printf("Received input\n");
prithviganeshk 1:3ead502a934a 108 led1 = 1;
prithviganeshk 1:3ead502a934a 109 begin = timer.read_ms();
prithviganeshk 1:3ead502a934a 110 end = begin + 2000;
prithviganeshk 1:3ead502a934a 111 strcpy(txBuffer, "n");
prithviganeshk 1:3ead502a934a 112
prithviganeshk 1:3ead502a934a 113 //Loop for 1 sec and check for whack
prithviganeshk 1:3ead502a934a 114 while(current < end){
prithviganeshk 1:3ead502a934a 115
prithviganeshk 1:3ead502a934a 116 current = timer.read_ms();
prithviganeshk 1:3ead502a934a 117 val = button.read();
prithviganeshk 1:3ead502a934a 118 if(val <= 0.4){
prithviganeshk 1:3ead502a934a 119 strcpy(txBuffer, "y"); ///send "y" if press
prithviganeshk 1:3ead502a934a 120 break;
prithviganeshk 1:3ead502a934a 121 }
prithviganeshk 1:3ead502a934a 122
prithviganeshk 1:3ead502a934a 123 }//end of 1 sec while loop
prithviganeshk 1:3ead502a934a 124
prithviganeshk 1:3ead502a934a 125 led1 = 0; //Switch of the Led
prithviganeshk 1:3ead502a934a 126 rf_send(txBuffer, strlen(txBuffer) + 1); // send data
prithviganeshk 1:3ead502a934a 127 pc.printf("Sent: %s\r\n", txBuffer);
prithviganeshk 1:3ead502a934a 128
prithviganeshk 1:3ead502a934a 129 }//end of if loop
prithviganeshk 1:3ead502a934a 130
prithviganeshk 1:3ead502a934a 131
prithviganeshk 1:3ead502a934a 132
prithviganeshk 1:3ead502a934a 133 }// end of while true
prithviganeshk 1:3ead502a934a 134
prithviganeshk 1:3ead502a934a 135 }//end of main