tms320f2812关于can总线的源程序.txt

TMS320F2812关于Can总线的源程序

#include "DSP28_Device.h"
void mailbox_check(int32 T1,int32 T2,int32 T3);
void mailbox_read(int16 i);

//Global variable for this example
Uint32 ErrorCount;
Uint32 MessageReceiveCount;

extern Uint32 TestMbox1;
extern Uint32 TestMbox2;
extern Uint32 TestMbox3;

void main(void)
{
        Uint16 j;
        /*初始化系统*/
        InitSysCtrl();

        /*关中断*/
        DINT;
        IER = 0x0000;
        IFR = 0x0000;

        /*初始化PIE中断*/
        InitPieCtrl();

        /*初始化PIE中断矢量表*/
        InitPieVectTable();        
        
        /*初始化SCIA寄存器*/
    InitECan();
        
        MessageReceiveCount = 0;
        ErrorCount = 0;
    
    #if CAN_INT
        /*设置中断服务程序入口地址*/
        EALLOW;        // This is needed to write to EALLOW protected registers
        PieVectTable.ECAN0INTA = &ECAN0INTA_ISR;
        PieVectTable.ECAN1INTA = &ECAN1INTA_ISR;
        EDIS;   // This is needed to disable write to EALLOW protected registers

        /*开中断*/
        IER |= M_INT9;
        #endif
        EINT;   // Enable Global interrupt INTM
        ERTM;        // Enable Global realtime interrupt DBGM

        for(;
        {
                ECanaRegs.CANTRS.all = 0x0000FFFF;
                while(ECanaRegs.CANTA.all != 0x0000FFFF);
                ECanaRegs.CANTA.all = 0x0000FFFF;
                MessageReceiveCount++;
                //for(j = 0; j < 0x1000; j++);
                
                #if !CAN_INT
                for(j = 0; j < 16; j++)
                {
                        mailbox_read(j);
                        mailbox_check(TestMbox1,TestMbox2,TestMbox3);
                }
                #endif
        }

}         

void mailbox_read(int16 MBXnbr)
{
   volatile struct MBOX *Mailbox;
   Mailbox = &ECanaMboxes.MBOX0 + MBXnbr;
   TestMbox1 = Mailbox->MDRL.all; // = 0x9555AAAn (n is the MBX number)
   TestMbox2 = Mailbox->MDRH.all; // = 0x89ABCDEF (a constant)
   TestMbox3 = Mailbox->MID.all;// = 0x9555AAAn (n is the MBX number)

} // MSGID of a rcv MBX is transmitted as the MDL data.


void mailbox_check(int32 T1, int32 T2, int32 T3)
{
    if((T1 != T3) || ( T2 != 0x89ABCDEF))
    {
       ErrorCount++;
    }
}