prithvi ganesh
/
ESE350-Whack-a-Mole_slave
whack a mole slave node
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Diff: whack_slave.cpp
- Revision:
- 1:3ead502a934a
- Child:
- 2:da2bbdea23a3
diff -r ddc820578cb0 -r 3ead502a934a whack_slave.cpp --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/whack_slave.cpp Sat Oct 17 23:05:52 2015 +0000 @@ -0,0 +1,135 @@ +#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) +{ + //Set the channel of the slave + uint8_t channel = 15; + mrf.SetChannel(channel); + + //Analog input + AnalogIn button(p20); //Analog input from the light sensor + + //Variable to read values + float val = 1; + int begin = 0; + int end = 0; + int current = 0; + + //Start the timer + timer.start(); + + while(true) { + + //Try to receive some data + rxLen = rf_receive(rxBuffer, 128); + + if(rxLen > 0) { + + //Switch on the Led and start the timer + printf("Received input\n"); + led1 = 1; + begin = timer.read_ms(); + end = begin + 2000; + strcpy(txBuffer, "n"); + + //Loop for 1 sec and check for whack + while(current < end){ + + current = timer.read_ms(); + val = button.read(); + if(val <= 0.4){ + strcpy(txBuffer, "y"); ///send "y" if press + break; + } + + }//end of 1 sec while loop + + led1 = 0; //Switch of the Led + rf_send(txBuffer, strlen(txBuffer) + 1); // send data + pc.printf("Sent: %s\r\n", txBuffer); + + }//end of if loop + + + + }// end of while true + +}//end of main \ No newline at end of file