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For master node of whack a mole program
Fork of ESE350-Whack-a-Mole by
whack_master.cpp
- Committer:
- prithviganeshk
- Date:
- 2015-10-17
- Revision:
- 1:691460a19f54
- Child:
- 2:73c0d4f0ff5c
File content as of revision 1:691460a19f54:
#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); // 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 Number of slaves int slaves = 2; //Channels of the nodes //channel1 = 15; //channel of the first node //channel2 = 14; //channel of the first node uint8_t channel; //Set the Count to 10 int count = 0; int begin = 0; int end = 0; int diff = 0; int tdiff = 0; //Start the timer timer.start(); //Set the yes and no arrays char yes[] = "y"; char no[] = "n"; while(count < 10) { //Send message to random node //Calculate random number //srand(time(0)); //channel = (rand()%(slaves)) + 14; //set to minimum channel channel = 15; //Set the Channel to the random node selected mrf.SetChannel(channel); //Send message to the random slave and start timer strcpy(txBuffer, "set"); rf_send(txBuffer, strlen(txBuffer) + 1); //Switch on the Led when sending data led2 = 1; printf("Sending signal to channel %u \n", channel); begin = timer.read_us(); //Wait for reply from the slave while(1){ rxLen = rf_receive(rxBuffer, 128); if(rxLen > 0) { //Calculate time difference end = timer.read_us(); diff = end - begin; tdiff += diff; //Switch off Led to indicate received data led2 = 0; //Check if mole was pressed or not pc.printf("Received: %s\r\n", rxBuffer); //If it was pressed - increment the count if(strcmp (yes,rxBuffer) == 0){ pc.printf("pressed\n"); count++; } //If it was not pressed - dont alter the count else if(strcmp (no,rxBuffer) == 0){ pc.printf("Not pressed\n"); } break; }//end of "if" receive }//end of inner while }//end of while count printf("Your did it in %d milliseconds\n",tdiff); }// end of main