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whack a mole slave node
Fork of ESE350-Whack-a-Mole by
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?
User | Revision | Line number | New 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 |