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can自测试的问题!
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新會員
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: 2008/7/4 21:15 最後登入時間
: 2011/4/6 16:46
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註冊會員
Level : 1 HP : 0 / 11 MP : 2 / 558 EXP : 47
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我用的是APP009这块板子,在上面做can在自检模式通信,为什么总是提示TXERR错误?具体程序如下: /********************************************* ** 功能描述: CAN口测试,11位标准标识符** *********************************************/ #define __dsPIC30F4011__ #include <p30f4011.h> int failmemory[40]; //--------------------------------------------------------------------------- _FOSC(CSW_FSCM_OFF & XT_PLL8); //XT with 8xPLL oscillator, Failsafe clock off _FWDT(WDT_OFF); //Watchdog timer disabled _FBORPOR(PBOR_OFF & MCLR_EN); //Brown-out reset disabled, MCLR reset enabled _FGS(CODE_PROT_OFF); //Code protect disabled
// ----------------------------------------------------------------------------
unsigned int buffer1; unsigned int buffer2; unsigned int buffer3; unsigned int buffer4; unsigned long int i = 0; #define FCY 7372800
void initial() { C1CTRLbits.REQOP = 0x4; //请求进入配置模式 while (C1CTRLbits.OPMODE!=0x4){} //确认进入配置模式 C1TX0CON = 0x0003; //发送0邮箱配置,高优先级 C1TX0SID = 0x0020; //发送0标准标识符,11位 C1TX0DLC = 0x01c0; //发送0数据长度,8字节 C1RX0CON = 0x0000; //接收0邮箱配置 C1RX0DLC = 0x0008; //接收0数据长度,8字节 C1RXF0SID = 0x0020; //接收滤波器0标准标识符,11位 C1RXM0SID = 0xffff; //接收屏蔽0标准标识符 C1CFG1 = 0x00ff; //波特率配置 C1CFG2 = 0x07ff; C1CTRLbits.REQOP = 0x02; //请求进入自测试模式 while (C1CTRLbits.OPMODE!=0x02){} //确认进入自测试模式 return; }
int main() { INTCON1=0x0000; INTCON2=0x0000; //关闭所有中断 initial(); while(1) { C1TX0B1 = 0x5555; //发送缓冲寄存器8字节 C1TX0B2 = 0x5555; C1TX0B3 = 0x5555; C1TX0B4 = 0x5501; C1TX0CONbits.TXREQ = 1; //启动发送 while (C1TX0CONbits.TXREQ==1){} //等待发送完成 if (C1RX0CONbits.RXFUL == 1) { buffer1 = C1RX0B1; buffer2 = C1RX0B2; buffer3 = C1RX0B3; buffer4 = C1RX0B4; C1RX0CONbits.RXFUL = 0; } } } 程序一直停在while (C1TX0CONbits.TXREQ==1){} 希望得到你的解答。
發表於: 2008/8/25 16:10
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