EP9315 arm,sja1000 can，wince5.0<br />参考周立功magic arm的读写函数<br />void SJA1000_ReadRegister(UINT8 reg, UINT8 *value)<br />{<br /> //g_lpBaseSJA1000[8] = reg;<br /> //*value = (UINT8)g_lpBaseSJA1000[4];<br /> //return (*(volatile UCHAR * const)Register);<br /> WRITE_REGISTER_UCHAR((PUCHAR)&g_lpBaseSJA1000[8], reg);<br /> *value = READ_REGISTER_UCHAR((PUCHAR)&g_lpBaseSJA1000[4]);<br /> #ifdef DEBUG<br /> RETAILMSG(1,(TEXT("read from[0x%02x]=[0x%02x]
"),reg,*value));<br /> #endif<br />}<br /><br />void SJA1000_WriteRegister(UINT8 reg, UINT8 value)<br />{<br /> //g_lpBaseSJA1000[4] = reg;<br /> //g_lpBaseSJA1000[8] = value;<br /> #ifdef DEBUG<br /> RETAILMSG(1,(TEXT("write to[0x%02x]=[0x%02x]
"),reg,value));<br /> #endif<br /> WRITE_REGISTER_UCHAR((PUCHAR)&g_lpBaseSJA1000[8], reg);<br /> WRITE_REGISTER_UCHAR((PUCHAR)&g_lpBaseSJA1000[4], value);<br />}可以写进sja1000,这个通过写CDR分频系数改变CLKOUT脚的频率，通过示波器得知<br />读的时候读回来的都是要读数据的地址，好像读得太快了，刚把地址送出，还没等到数据，就读，结果读到地址了，因sja1000地址数据线复用。各位大侠有什么看法。<br />串口打印信息如下<br />read from[0x00]=[0x00]<br />read from[0x01]=[0x01]<br />read from[0x02]=[0x02]<br />read from[0x03]=[0x03]<br />read from[0x04]=[0x04]<br />read from[0x05]=[0x05]<br />read from[0x06]=[0x06]<br />read from[0x07]=[0x07]<br />read from[0x08]=[0x08]<br />read from[0x09]=[0x09] |
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