Diff: main.cpp

Revision:

0:96c0a1b1070f

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Wed Aug 24 09:47:13 2011 +0000
@@ -0,0 +1,68 @@
+#include "mbed.h"
+#include "CAN.h"
+ 
+ Ticker ticker;
+ 
+ DigitalOut led1(LED1);
+ DigitalOut led2(LED2);
+ 
+ LocalFileSystem local("local");
+ 
+ // CAN_RS pin at Philips PCA82C250 can bus controller.
+ // activate transceiver by pulling this pin to GND.
+ // (Rise and fall slope controlled by resistor R_s)
+ // (+5V result in tranceiver standby mode)
+ // For further information see datasheet page 4
+ DigitalOut can_Pca82c250SlopePin(p28);
+  
+ // second can controller on these pins. Not used here.
+ CAN can2(p9, p10);
+ 
+ // We use can on mbed pins 29(CAN_TXD) and 30(CAN_RXD).
+// CAN can2(p30, p29);
+
+ void send() {
+     static char counter = 0;
+     if (can2.write(CANMessage(0x300, &counter, 1))) {
+         printf("CanTx--> id: 0x200  dlc: 1  data: %x\n\r", counter);
+         counter++;
+     }
+     // toggle led1 after every transmission
+     led1 = !led1;
+ }
+
+ int main() {
+ 
+  FILE *test1 = fopen("/local/test.txt", "w");
+ 
+  bool flag = false;
+  int i =0 ;
+ 
+     // 500kbit/s
+     can2.frequency(500000);
+     // activate external can transceiver
+     can_Pca82c250SlopePin = 0;
+     // every 500ms
+     ticker.attach(&send, 0.5);
+     /// create message object for message reception
+     CANMessage can_MsgRx;
+   while(i<10)
+   {     
+         while (flag!=true)
+        {
+             // send received messages to the pc via serial line (9k6, 8n1)
+                 if (can2.read(can_MsgRx))
+                {
+                      led2 = !led2;
+                      flag = true;
+                }
+      
+         
+        }
+      
+       fprintf(test1,"%d-%d-%c%c%c%c%c%c%c%c\r",can_MsgRx.len,can_MsgRx.id,can_MsgRx.data[0],can_MsgRx.data[1],can_MsgRx.data[2],can_MsgRx.data[3],can_MsgRx.data[4],can_MsgRx.data[5],can_MsgRx.data[6],can_MsgRx.data[7]);
+       flag = false ;
+       i++;
+    }  
+       fclose(test1);
+}