Diff: whack_master.cpp

Revision:

1:691460a19f54

Child:

2:73c0d4f0ff5c

diff -r ddc820578cb0 -r 691460a19f54 whack_master.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/whack_master.cpp	Sat Oct 17 23:06:04 2015 +0000
@@ -0,0 +1,162 @@
+#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