mcp2510 的 can 总线收发器程序 pcbomb 发表于 2008-6-30 14:47:00 阅读全文(769) | 回复(1) | 引用通告(0) | 编辑 ＃ i nclude ＃ i nclude "mcp2510.h" void mcp_reset(void) { SPI_init_hw(); //设置成SPI 方式 init_can_io(); // SPI_mcp_reset(); // } void mcp_read( unsigned char MCPaddr, unsigned char* readdata, unsigned char length ) { unsigned char loopCnt; SPI_mcp_select(); // Select the MCP device at the SPI bus // Start reading and set first address SPI_mcp_RD_address(MCPaddr); for (loopCnt=0; loopCnt < length; loopCnt++) { // Get a byte and store at pointer *readdata = SPI_putch(MCPaddr); // Increment the pointers to next location // Test++; MCPaddr++; readdata++; } SPI_mcp_unselect(); } void mcp_write( unsigned char MCPaddr, unsigned char* writedata, unsigned char length ) { unsigned char loopCnt; SPI_mcp_select(); // Start write and set first address SPI_mcp_WR_address( MCPaddr ); for (loopCnt=0; loopCnt < length; loopCnt++) { // Write a byte SPI_putch( *writedata ); // Increment the pointer to next location writedata++; } SPI_mcp_unselect(); } void mcp_read_can_id( unsigned char mcp_addr, unsigned char* ext, unsigned long* can_id ) { unsigned char tbufdata[4]; *ext = 0; *can_id = 0; mcp_read( mcp_addr, tbufdata, 4); *can_id = (tbufdata[SIDH]<<3) + (tbufdata[SIDL]>>5); if ( (tbufdata[SIDL] & TXB_EXIDE_M) == TXB_EXIDE_M ) { *can_id = (*can_id<<2) + (tbufdata[SIDL] & 0x03); *can_id <<= 16; *can_id = *can_id +(tbufdata[EID8]<<8) + tbufdata[EID0]; *ext = 1; } } /******************************************************************************************************* buffer:0-1 *******************************************************************************************************/ void mcp_read_can( unsigned char buffer, unsigned char* ext, uns...
