main.cpp

00001 /*
00002  * An example showing how to use the mbed CAN API:
00003  *
00004  * Two affordable (about $2 on ebay) STM32F103C8T6 boards (20kB SRAM, 64kB Flash),
00005  * (see [https://developer.mbed.org/users/hudakz/code/STM32F103C8T6_Hello/] for more details)
00006  * are connected to the same CAN bus via transceivers (MCP2551 or TJA1040, or etc.).
00007  * CAN transceivers are not part of NUCLEO boards, therefore must be added by you.
00008  * Remember also that CAN bus (even a short one) must be terminated with 120 Ohm resitors at both ends.
00009  *
00010  *
00011  * The same code is used for both mbed boards, but:
00012  *      For board #1 compile the example without any change.
00013  *      For board #2 comment out line 21 before compiling
00014  *
00015  * Once the binaries have been downloaded to the boards reset both boards at the same time.
00016  *
00017  */
00018 
00019 //#define TARGET_STM32F103C8T6    1       // uncomment this line to use STM32F103C8T6 boards
00020 
00021 #define BOARD1                  1       // comment out this line when compiling for board #2
00022 
00023 #if defined(TARGET_STM32F103C8T6)
00024     #define LED_PIN     PC_13
00025     const int           OFF = 1;
00026     const int           ON = 0;
00027 #else
00028     #define LED_PIN     LED1
00029     const int           OFF = 0;
00030     const int           ON = 1;
00031 #endif
00032     const unsigned int  RX_ID = 0x101;
00033     const unsigned int  TX_ID = 0x100;
00034 
00035 #include "mbed.h"
00036 #include "CANMsg.h"
00037 #include "CANJpa.h"
00038 
00039 //Serial              pc(PA_2, PA_3);
00040 
00041 void init_can();
00042 void can_write();
00043 
00044 
00045 /**
00046  * @brief   Main
00047  * @note
00048  * @param
00049  * @retval
00050  */
00051 int main(void)
00052 {
00053     pc.baud(9600);          // set serial speed
00054     init_can();
00055     led = ON;               // turn the LED on
00056     timer.start();          // start timer
00057     while(1) {
00058         if(timer.read_ms() >= 2000) {    // check for timeout
00059             timer.stop();                // stop timer
00060             timer.reset();               // reset timer
00061             can_write();
00062 
00063         }
00064     }
00065 }