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Re: 请教:dspic30f4011单片机can通信!
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: 2004/4/30 10:53最後登入時間
: 2021/11/30 18:11
From CAE, Microchip
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初期實驗可以先用 Loop-Back Mode 看看收發的程式是否有誤後再用兩片板子收發,這樣比較容易除錯。
發表於: 2008/12/3 9:13
Re: 请教:dspic30f4011单片机can通信!
版主
Joined
: 2004/4/30 10:53最後登入時間
: 2021/11/30 18:11
From CAE, Microchip
Group:
站務管理者 註冊會員
Level : 75
HP : 744 / 1861
MP : 5367 / 111025
EXP : 45
發表於: 2008/12/3 8:58
请教:dspic30f4011单片机can通信!
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: 2008/12/2 22:54最後登入時間
: 2008/12/2 22:55
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我想测试一下dspic30f4011单片机can通信,晶振7.372MHz,PLL=4.用两块单片机,A单片机发,B单片机收。于是我把A的C1TX接到B的C1RX上,但发射板A能看到发射出数据了(不知对错,用示波器似乎看不出来),而接收板B接收不到数据。不知为什么收不到?发射有问题吗?请各位大侠为小弟指正。用以下程序: 发(A)的程序: #include "p30f4011.h" #include "can.h" int failmemory[40]; unsigned int buffer1; unsigned int buffer2; unsigned int buffer3; unsigned int buffer4; //unsigned int a; unsigned long int i=0; //unsigned long int j=0; void initial() { //rx TRISF=0X0001; //先设置18B20口方向为输出 TRISB=0X0000; //设置B口方向为输出 TRISD=0X0000; //设置D口方向为输出 IFS0bits.T1IF=0; //先清除定时器中断标志位 PR1=0XFFFF; //周期定最大 T1CON=0X0020; //分频比为1:64 INTCON1=0x0000; INTCON2=0x0000; //关闭所有中断 //can set C1CTRLbits.REQOP=0x4; while(C1CTRLbits.OPMODE!=0x4){} C1CTRLbits.CANCAP=1; C1TX0CON=0x0003; C1TX0SID=0x0020; C1TX0EID=0x0000; C1TX0DLC=0x01c0; C1RX0CON=0x0000; C1RX0DLC=0x0118; C1RXF0SID=0x0020; C1RXM0SID=0xffff; C1RX1CON=0x0000; C1RX1DLC=0x0118; C1RXF1SID=0x0020; C1RXM1SID=0xffff; C1CFG1bits.SJW=0; //SJW=1 x TQ C1CFG1bits.BRP=0x3f; //125K C1CFG2 = 0x03ac; //SEG2PH=4;SEG1PH=6;PRSEG=5 C1CTRLbits.REQOP=0x0; while(C1CTRLbits.OPMODE!=0x0){} return; } int main() { int i; INTCON1=0x0000; INTCON2=0x0000; initial(); while(1) { //tx while(1) { TMR1=0XC2F6; //定时器初值 T1CONbits.TON=1; //启动定时器 while(!IFS0bits.T1IF); //等待0.1s定时到 IFS0bits.T1IF=0; C1TX0B1 = 0x5555; C1TX0B2 = 0x5555; C1TX0B3 = 0x5555; //B3跟B4四字节数据无效,也可做效验用 C1TX0B4 = 0x5555; C1TX0CONbits.TXREQ = 1; //启动发送 while (C1TX0CONbits.TXREQ==1){} //等待发送完成 for (i=0;i<200;i++){} } } } 收(B)的程序: #include "p30f4011.h" #include "can.h" int failmemory[40]; unsigned int buffer1; unsigned int buffer2; unsigned int buffer3; unsigned int buffer4; //unsigned int a; unsigned long int i=0; //unsigned long int j=0; void initial() { //rx TRISF=0X0001; //先设置18B20口方向为输出 TRISB=0X0000; //设置B口方向为输出 TRISD=0X0000; //设置D口方向为输出 IFS0bits.T1IF=0; //先清除定时器中断标志位 PR1=0XFFFF; //周期定最大 T1CON=0X0020; //分频比为1:64 INTCON1=0x0000; INTCON2=0x0000; //关闭所有中断 //can set C1CTRLbits.REQOP=0x4; while(C1CTRLbits.OPMODE!=0x4){} C1CTRLbits.CANCAP=1; C1TX0CON=0x0003; C1TX0SID=0x0020; C1TX0EID=0x0000; C1TX0DLC=0x01c0; C1RX0CON=0x0000; C1RX0DLC=0x0118; C1RXF0SID=0x0020; C1RXM0SID=0xffff; C1RX1CON=0x0000; C1RX1DLC=0x0118; C1RXF1SID=0x0020; C1RXM1SID=0xffff; C1CFG1bits.SJW=0; //SJW=1 x TQ C1CFG1bits.BRP=0x3f; //125K C1CFG2 = 0x03ac; //SEG2PH=4;SEG1PH=6;PRSEG=5 C1CTRLbits.REQOP=0x0; while(C1CTRLbits.OPMODE!=0x0){} return; } int main() { int i; INTCON1=0x0000; INTCON2=0x0000; initial(); while(1) { //rx while(C1RX0CONbits.RXFUL==0); //等待接收到数据 buffer1 = C1RX0B1; //读取接收到的数据 buffer2 = C1RX0B2; buffer3 = C1RX0B3; buffer4 = C1RX0B4; C1RX0CONbits.RXFUL = 0; } }
發表於: 2008/12/2 23:01
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