Bill Jack
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ESE350-Whack-a-Mole
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Diff: WhackAMole.cpp
- Revision:
- 0:ddc820578cb0
diff -r 000000000000 -r ddc820578cb0 WhackAMole.cpp --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/WhackAMole.cpp Wed Mar 20 19:05:36 2013 +0000 @@ -0,0 +1,113 @@ +#include "mbed.h" +#include "MRF24J40.h" + +#include <string> + +// RF tranceiver to link with handheld. +MRF24J40 mrf(p11, p12, p13, p14, p21); + +// LEDs you can treat these as variables (led2 = 1 will turn led2 on!) +DigitalOut led1(LED1); +DigitalOut led2(LED2); +DigitalOut led3(LED3); +DigitalOut led4(LED4); + +// Timer +Timer timer; + +// Serial port for showing RX data. +Serial pc(USBTX, USBRX); + +// Used for sending and receiving +char txBuffer[128]; +char rxBuffer[128]; +int rxLen; + +//***************** Do not change these methods (please) *****************// + +/** +* Receive data from the MRF24J40. +* +* @param data A pointer to a char array to hold the data +* @param maxLength The max amount of data to read. +*/ +int rf_receive(char *data, uint8_t maxLength) +{ + uint8_t len = mrf.Receive((uint8_t *)data, maxLength); + uint8_t header[8]= {1, 8, 0, 0xA1, 0xB2, 0xC3, 0xD4, 0x00}; + + if(len > 10) { + //Remove the header and footer of the message + for(uint8_t i = 0; i < len-2; i++) { + if(i<8) { + //Make sure our header is valid first + if(data[i] != header[i]) + return 0; + } else { + data[i-8] = data[i]; + } + } + + //pc.printf("Received: %s length:%d\r\n", data, ((int)len)-10); + } + return ((int)len)-10; +} + +/** +* Send data to another MRF24J40. +* +* @param data The string to send +* @param maxLength The length of the data to send. +* If you are sending a null-terminated string you can pass strlen(data)+1 +*/ +void rf_send(char *data, uint8_t len) +{ + //We need to prepend the message with a valid ZigBee header + uint8_t header[8]= {1, 8, 0, 0xA1, 0xB2, 0xC3, 0xD4, 0x00}; + uint8_t *send_buf = (uint8_t *) malloc( sizeof(uint8_t) * (len+8) ); + + for(uint8_t i = 0; i < len+8; i++) { + //prepend the 8-byte header + send_buf[i] = (i<8) ? header[i] : data[i-8]; + } + //pc.printf("Sent: %s\r\n", send_buf+8); + + mrf.Send(send_buf, len+8); + free(send_buf); +} + + +//***************** You can start coding here *****************// +int main (void) +{ + uint8_t channel = 2; + + //Set the Channel. 0 is default, 15 is max + mrf.SetChannel(channel); + + //Start the timer + timer.start(); + + while(true) { + //Try to receive some data + rxLen = rf_receive(rxBuffer, 128); + if(rxLen > 0) { + //Toggle the Led + led1 = led1^1; + pc.printf("Received: %s\r\n", rxBuffer); + } + + //Send some data every second + if(timer.read_ms() >= 1000) { + //Reset the timer to 0 + timer.reset(); + // Toggle LED 2. + led2 = led2^1; + //Add to the buffer. You may want to check out sprintf + strcpy(txBuffer, "Jeff is the best TA!"); + //Send the buffer + rf_send(txBuffer, strlen(txBuffer) + 1); + pc.printf("Sent: %s\r\n", txBuffer); + } + } +}