multihop protocol
Dependencies: mbed
remote.cpp@1:019a3be50b96, 2015-11-10 (annotated)
- Committer:
- mfrede
- Date:
- Tue Nov 10 20:42:06 2015 +0000
- Revision:
- 1:019a3be50b96
- Child:
- 2:9365aaf34637
file rename
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
mfrede | 1:019a3be50b96 | 1 | #include "mbed.h" |
mfrede | 1:019a3be50b96 | 2 | #include "MRF24J40.h" |
mfrede | 1:019a3be50b96 | 3 | #include <string> |
mfrede | 1:019a3be50b96 | 4 | |
mfrede | 1:019a3be50b96 | 5 | // RF tranceiver to link with handheld. |
mfrede | 1:019a3be50b96 | 6 | MRF24J40 mrf(p11, p12, p13, p14, p21); |
mfrede | 1:019a3be50b96 | 7 | |
mfrede | 1:019a3be50b96 | 8 | // LEDs you can treat these as variables (led2 = 1 will turn led2 on!) |
mfrede | 1:019a3be50b96 | 9 | DigitalOut led1(LED1); |
mfrede | 1:019a3be50b96 | 10 | DigitalOut led2(LED2); |
mfrede | 1:019a3be50b96 | 11 | DigitalOut led3(LED3); |
mfrede | 1:019a3be50b96 | 12 | DigitalOut led4(LED4); |
mfrede | 1:019a3be50b96 | 13 | |
mfrede | 1:019a3be50b96 | 14 | // Timer |
mfrede | 1:019a3be50b96 | 15 | Timer timer; |
mfrede | 1:019a3be50b96 | 16 | |
mfrede | 1:019a3be50b96 | 17 | // Serial port for showing RX data. |
mfrede | 1:019a3be50b96 | 18 | Serial pc(USBTX, USBRX); |
mfrede | 1:019a3be50b96 | 19 | |
mfrede | 1:019a3be50b96 | 20 | // Used for sending and receiving |
mfrede | 1:019a3be50b96 | 21 | char txBuffer[128]; |
mfrede | 1:019a3be50b96 | 22 | char rxBuffer[128]; |
mfrede | 1:019a3be50b96 | 23 | int rxLen; |
mfrede | 1:019a3be50b96 | 24 | |
mfrede | 1:019a3be50b96 | 25 | //***************** Do not change these methods (please) *****************// |
mfrede | 1:019a3be50b96 | 26 | |
mfrede | 1:019a3be50b96 | 27 | /** |
mfrede | 1:019a3be50b96 | 28 | * Receive data from the MRF24J40. |
mfrede | 1:019a3be50b96 | 29 | * |
mfrede | 1:019a3be50b96 | 30 | * @param data A pointer to a char array to hold the data |
mfrede | 1:019a3be50b96 | 31 | * @param maxLength The max amount of data to read. |
mfrede | 1:019a3be50b96 | 32 | */ |
mfrede | 1:019a3be50b96 | 33 | int rf_receive(char *data, uint8_t maxLength) |
mfrede | 1:019a3be50b96 | 34 | { |
mfrede | 1:019a3be50b96 | 35 | uint8_t len = mrf.Receive((uint8_t *)data, maxLength); |
mfrede | 1:019a3be50b96 | 36 | uint8_t header[8]= {1, 8, 0, 0xA1, 0xB2, 0xC3, 0xD4, 0x00}; |
mfrede | 1:019a3be50b96 | 37 | |
mfrede | 1:019a3be50b96 | 38 | if(len > 10) { |
mfrede | 1:019a3be50b96 | 39 | //Remove the header and footer of the message |
mfrede | 1:019a3be50b96 | 40 | for(uint8_t i = 0; i < len-2; i++) { |
mfrede | 1:019a3be50b96 | 41 | if(i<8) { |
mfrede | 1:019a3be50b96 | 42 | //Make sure our header is valid first |
mfrede | 1:019a3be50b96 | 43 | if(data[i] != header[i]) |
mfrede | 1:019a3be50b96 | 44 | return 0; |
mfrede | 1:019a3be50b96 | 45 | } else { |
mfrede | 1:019a3be50b96 | 46 | data[i-8] = data[i]; |
mfrede | 1:019a3be50b96 | 47 | } |
mfrede | 1:019a3be50b96 | 48 | } |
mfrede | 1:019a3be50b96 | 49 | |
mfrede | 1:019a3be50b96 | 50 | //pc.printf("Received: %s length:%d\r\n", data, ((int)len)-10); |
mfrede | 1:019a3be50b96 | 51 | } |
mfrede | 1:019a3be50b96 | 52 | return ((int)len)-10; |
mfrede | 1:019a3be50b96 | 53 | } |
mfrede | 1:019a3be50b96 | 54 | |
mfrede | 1:019a3be50b96 | 55 | /** |
mfrede | 1:019a3be50b96 | 56 | * Send data to another MRF24J40. |
mfrede | 1:019a3be50b96 | 57 | * |
mfrede | 1:019a3be50b96 | 58 | * @param data The string to send |
mfrede | 1:019a3be50b96 | 59 | * @param maxLength The length of the data to send. |
mfrede | 1:019a3be50b96 | 60 | * If you are sending a null-terminated string you can pass strlen(data)+1 |
mfrede | 1:019a3be50b96 | 61 | */ |
mfrede | 1:019a3be50b96 | 62 | void rf_send(char *data, uint8_t len) |
mfrede | 1:019a3be50b96 | 63 | { |
mfrede | 1:019a3be50b96 | 64 | //We need to prepend the message with a valid ZigBee header |
mfrede | 1:019a3be50b96 | 65 | uint8_t header[8]= {1, 8, 0, 0xA1, 0xB2, 0xC3, 0xD4, 0x00}; |
mfrede | 1:019a3be50b96 | 66 | uint8_t *send_buf = (uint8_t *) malloc( sizeof(uint8_t) * (len+8) ); |
mfrede | 1:019a3be50b96 | 67 | |
mfrede | 1:019a3be50b96 | 68 | for(uint8_t i = 0; i < len+8; i++) { |
mfrede | 1:019a3be50b96 | 69 | //prepend the 8-byte header |
mfrede | 1:019a3be50b96 | 70 | send_buf[i] = (i<8) ? header[i] : data[i-8]; |
mfrede | 1:019a3be50b96 | 71 | } |
mfrede | 1:019a3be50b96 | 72 | //pc.printf("Sent: %s\r\n", send_buf+8); |
mfrede | 1:019a3be50b96 | 73 | |
mfrede | 1:019a3be50b96 | 74 | mrf.Send(send_buf, len+8); |
mfrede | 1:019a3be50b96 | 75 | free(send_buf); |
mfrede | 1:019a3be50b96 | 76 | } |
mfrede | 1:019a3be50b96 | 77 | |
mfrede | 1:019a3be50b96 | 78 | |
mfrede | 1:019a3be50b96 | 79 | //***************** You can start coding here *****************// |
mfrede | 1:019a3be50b96 | 80 | |
mfrede | 1:019a3be50b96 | 81 | int main (void) |
mfrede | 1:019a3be50b96 | 82 | { |
mfrede | 1:019a3be50b96 | 83 | //Set the channel of the slave |
mfrede | 1:019a3be50b96 | 84 | uint8_t channel = 15; |
mfrede | 1:019a3be50b96 | 85 | mrf.SetChannel(channel); |
mfrede | 1:019a3be50b96 | 86 | |
mfrede | 1:019a3be50b96 | 87 | //Analog input |
mfrede | 1:019a3be50b96 | 88 | AnalogIn light(p20); //Analog input from the light sensor |
mfrede | 1:019a3be50b96 | 89 | AnalogIn temp(p19); //Analog input from the temp snesor |
mfrede | 1:019a3be50b96 | 90 | |
mfrede | 1:019a3be50b96 | 91 | //Variable to read values |
mfrede | 1:019a3be50b96 | 92 | float val = 1; |
mfrede | 1:019a3be50b96 | 93 | int begin = 0; |
mfrede | 1:019a3be50b96 | 94 | int end = 0; |
mfrede | 1:019a3be50b96 | 95 | int current = 0; |
mfrede | 1:019a3be50b96 | 96 | |
mfrede | 1:019a3be50b96 | 97 | //Start the timer |
mfrede | 1:019a3be50b96 | 98 | timer.start(); |
mfrede | 1:019a3be50b96 | 99 | |
mfrede | 1:019a3be50b96 | 100 | while(true) { |
mfrede | 1:019a3be50b96 | 101 | |
mfrede | 1:019a3be50b96 | 102 | //Try to receive some data |
mfrede | 1:019a3be50b96 | 103 | rxLen = rf_receive(rxBuffer, 128); |
mfrede | 1:019a3be50b96 | 104 | |
mfrede | 1:019a3be50b96 | 105 | if(rxLen > 0) { |
mfrede | 1:019a3be50b96 | 106 | |
mfrede | 1:019a3be50b96 | 107 | //Switch on the Led and start the timer |
mfrede | 1:019a3be50b96 | 108 | printf("Received input\n"); |
mfrede | 1:019a3be50b96 | 109 | led1 = 1; |
mfrede | 1:019a3be50b96 | 110 | begin = timer.read_ms(); |
mfrede | 1:019a3be50b96 | 111 | end = begin + 1000; |
mfrede | 1:019a3be50b96 | 112 | strcpy(txBuffer, "n"); |
mfrede | 1:019a3be50b96 | 113 | |
mfrede | 1:019a3be50b96 | 114 | |
mfrede | 1:019a3be50b96 | 115 | while(current < end) { |
mfrede | 1:019a3be50b96 | 116 | |
mfrede | 1:019a3be50b96 | 117 | current = timer.read_ms(); |
mfrede | 1:019a3be50b96 | 118 | val = button.read(); |
mfrede | 1:019a3be50b96 | 119 | //printf("val: %f\r\n",val); |
mfrede | 1:019a3be50b96 | 120 | if(val < 0.1f ) { |
mfrede | 1:019a3be50b96 | 121 | strcpy(txBuffer, "y"); ///send "y" if press |
mfrede | 1:019a3be50b96 | 122 | break; |
mfrede | 1:019a3be50b96 | 123 | } |
mfrede | 1:019a3be50b96 | 124 | |
mfrede | 1:019a3be50b96 | 125 | }//end of 1 sec while loop |
mfrede | 1:019a3be50b96 | 126 | |
mfrede | 1:019a3be50b96 | 127 | led1 = 0; //Switch of the Led |
mfrede | 1:019a3be50b96 | 128 | rf_send(txBuffer, strlen(txBuffer) + 1); // send data |
mfrede | 1:019a3be50b96 | 129 | pc.printf("Sent: %s\r\n", txBuffer); |
mfrede | 1:019a3be50b96 | 130 | |
mfrede | 1:019a3be50b96 | 131 | }//end of if loop |
mfrede | 1:019a3be50b96 | 132 | |
mfrede | 1:019a3be50b96 | 133 | |
mfrede | 1:019a3be50b96 | 134 | |
mfrede | 1:019a3be50b96 | 135 | }// end of while true |
mfrede | 1:019a3be50b96 | 136 | |
mfrede | 1:019a3be50b96 | 137 | }//end of main |