上面这位仁兄,我现在把程序也发给你,给我看看好吗?
我现在觉得到不是IDR,IDAR,IDMR的问题,到是MC33989之间不能通信啊.
MC33989该如何使用啊?
#include /* for EnableInterrupts macro */
#include /* include peripheral declarations */
//---------------------定义全局变量------------------//
unsigned int SPI_count=0; //SPI 计数器
void CAN_Transmit(void);
//----------------- transmit SPI program ------------------//
void transmit_SPI (unsigned char SPI_data)
{
PTC_PTC2 = 0 ; PTC_PTC2 = 0 ; PTC_PTC2 = 0 ;
PTC_PTC2 = 0 ; PTC_PTC2 = 0 ; PTC_PTC2 = 0 ; //SPI 端口拉低
while(SPSCR_SPTE==0);
SPDR=SPI_data;
PTC_PTC2 = 0 ; PTC_PTC2 = 0 ; PTC_PTC2 = 0 ;
PTC_PTC2 = 0 ; PTC_PTC2 = 0 ; PTC_PTC2 = 0 ; //SPI 继续端口拉低
PTC_PTC2 = 1 ; PTC_PTC2 = 1 ; // SPI 端口拉高
}
//------------------display function---------------------//
void delay(void) {
int i ;
for( i = 0; i < 100; i++) {
}
}
//------------------timer interrupt program------------------------//
interrupt 4 void TimerInterrupt(void)
{
PSC_PSTOP = 0x01;
PSC_POF = 0x00;
PSC_PRST = 0x01; //clear PSC_POF and let timer modul execute again
__RESET_WATCHDOG(); // kicks the watchdog
SPI_count++;
if(SPI_count==5) //every 100ms SPI W/D
{
transmit_SPI(0xB3);
SPI_count = 0;
CAN_Transmit();
}
PSC_PSTOP = 0;
}
interrupt 17 void CAN_Receive(void) {
unsigned char receive[8]={0,0,0,0,0,0,0,0};
unsigned char id[4] = {0,0,0,0};
PTA_PTA7 = 1;
delay();
PTA_PTA7 = 0;
delay();
id[0] = REC_IDR0;
id[1] = REC_IDR1;
id[2] = REC_IDR2;
id[3] = REC_IDR3;
receive[0] = REC_DSR0;
receive[1] = REC_DSR1;
receive[2] = REC_DSR2;
receive[3] = REC_DSR3;
receive[4] = REC_DSR4;
receive[5] = REC_DSR5;
receive[6] = REC_DSR6;
receive[7] = REC_DSR7;
CRFLG_RXF = 1;
}
//--------------------------- CAN transmit program ----------------------//
void CAN_Transmit(void){
unsigned char emptytest;
unsigned char emptytest0;
unsigned char emptytest1;
unsigned char emptytest2;
emptytest = CTFLG;
emptytest0 = emptytest&0x01; //判断接受区为空
emptytest1 = emptytest&0x02;
emptytest2 = emptytest&0x04;
if(emptytest0!=0)
{
DLR0 = 0x08;
DSR00 = 0xff;
DSR10 = 0x00;
DSR20 = 0xff;
DSR30 = 0x00;
DSR40 = 0xff;
DSR50 = 0x00;
DSR60 = 0xff;
DSR70 = 0x00;
IDR00 = 0x33; // DP256:0x11; AZ60:0x33; GZ16:0x22; MPC555:0x44
IDR10 = 0xFF;
IDR20 = 0xFF;
IDR30 = 0xFE; //extended identifers
TBPR0 = 0x01;
CTFLG = 0x01; //buffer0 启动发送
}
else if(emptytest1!=0)
{
DLR1 = 0x08;
DSR01 = 0xff;
DSR11 = 0x00;
DSR21 = 0xff;
DSR31 = 0x00;
DSR41 = 0xff;
DSR51 = 0x00;
DSR61 = 0xff;
DSR71 = 0x00;
IDR01 = 0x33; // DP256:0x11; AZ60:0x33; GZ16:0x22; MPC555:0x44
IDR11 = 0xFF;
IDR21 = 0xFF;
IDR31 = 0xFE; //extended identifers
TBPR1 = 0x01;
CTFLG = 0x02; //buffer1 启动发送
}
else if(emptytest2!=0)
{
DLR2 = 0x08;
DSR02 = 0xff;
DSR12 = 0x00;
DSR22 = 0xff;
DSR32 = 0x00;
DSR42 = 0xff;
DSR52 = 0x00;
DSR62 = 0xff;
DSR72 = 0x00;
IDR02 = 0x33; // DP256:0x11; AZ60:0x33; GZ16:0x22; MPC555:0x44
IDR12 = 0xFF;
IDR22 = 0xFF;
IDR32 = 0xFE; //extended identifers
TBPR2 = 0x01;
CTFLG = 0x04; //buffer2 启动发送
}
}
//------------------------ Ports initial ------------------------------//
void Init_PORT(void){
DDRA_DDRA7 = 1;
DDRC_DDRC2 = 1; //MC33989 CSB choice
DDRC_DDRC4 = 1;
DDRC_DDRC5 = 1;
DDRE_DDRE4 = 0x0; //PTE4==high, AZ32A als master wird
PTA_PTA7 = 0;
PTC_PTC2 = 1 ;
PTC_PTC4 = 0 ;
PTC_PTC5 = 0 ;
}
//-------------------------SPI initial program-------------------------//
void Init_SPI(void){
SPCR_SPE =1; //设置SPI寄存器
SPCR_SPMSTR = 1;
SPSCR_SPR0=0;
SPSCR_SPR1=0; //bund rate =500k ,CGMOUT=2M hz ,intenal bus clock =1M hz
PTC_PTC2 = 1 ;
}
//--------------------------MSCAN initial program-----------------------//
void Init_MSCAN08(void){
CMCR0 = 0x01; //CAN模块为软复位状态
CMCR1 = 0x04;
CBTR0 = 0x43;
CBTR1 = 0xA3; //波特率为62.5K
CIDAC = 0x00; //接收滤波为32位滤波
CIDAR0 = 0x00; //滤波使它接收一帧
CIDAR1 = 0x00;
CIDAR2 = 0x00;
CIDAR3 = 0x00; //extended identifers
CIDMR0 = 0xFF;
CIDMR1 = 0xFF;
CIDMR2 = 0xFF;
CIDMR3 = 0xFF; //extended identifers
CMCR0 = 0x00; //把CAN模块设置为数据输入输出状态
CRIER = 0xff; //CAN接收中断使能
}
//------------------------MCU initial program------------------------//
void Init_AZ32A(void)
{
//CONFIG1 = 0x70; //cop module enable
//CONFIG2 = 0x09; //配置寄存器初始化,外接晶振4MHZ，内部总线1MHZ
//MORA_COPD = 0x70;
PSC_PPS = 0; //1分频
PSC_POIE = 1; //PIT interrupt enable
PMODH = 0x03;
PMODL = 0xe8; //定时器设置成为1ms产生一次中断
PSC_PSTOP = 0; //PIT 计数器启动
Init_PORT();
Init_MSCAN08(); //MSCAN initial
Init_SPI(); //SPI initial
}
//----------------------------main function----------------------------//
void main(void){
EnableInterrupts; //中断使能
Init_AZ32A(); //调用单片机初始化子程序
//set MC33989 status by SPI
transmit_SPI(0xB3); //set MC33889 watchdog works at no window mode and 350ms
transmit_SPI(0x11); //set MC33889 MCR Reg,and MC33889 works at Normal status
transmit_SPI(0x50); //set MC33889 CAN Reg,and CAN works normal status
for(;;){
/*delay();
transmit_SPI(0xB3);
delay();
CAN_Transmit(); */
//__RESET_WATCHDOG(); /* feeds the dog */
}
}
如果是自发自收,我通过单步调试是可以通信的.也就是我发送成功,接收缓冲寄存器也相应地正确地接收到发送的值.
可是我用2块板子之间进行调试时始终看不到总线上有信号.
请哪位高手帮忙看一下我的程序代码有何问题?
在此谢过!
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