mcp2510t.c

pic单片机工程

/*
** Copyright (C)1999 KVASER AB, http://www.kvaser.com
** This code may be freely distrubuted and used if the source is indicated.
**
*/

#include <stdio.h>
#include <conio.h>
#include "inc\std.h"
#include "inc\spi.h"
#include "inc\spi_mcp.h"
#include "inc\mcp2510.h"
#include "inc\mcp2510t.h"

/*
 ** Read all registers in the MCP2510 and print them in tabular form.
 */
void mcp_read_all ( void )
{
    uchar i, j;
    uchar Store;

    printf("Reading all registers in the MCP2510...\n\r" );

    SPI_mcp_RD_address(0); // Makes a SPI_mcp_select()

    for (j =0; j < 8 ; j++ ) {
        printf("Address %02X to %02X: ", (j*16), (j*16+15) );
        for (i=0; i < 0x10 ; i++ ) {
            Store = SPI_putch(i);
            printf("%02X ", Store );
        }
        printf("\n\r");
    }

    SPI_mcp_unselect();
    
    Store = SPI_mcp_RD_status(); // Makes a SPI_mcp_select()
    printf("Status = 0x%02x\n\r", Store );
    SPI_mcp_unselect();

    mcp_read(CLKCTRL,&Store,1); // Makes a SPI_mcp_select()
    printf("Canctrl = 0x%02x\n\r", Store );
}


/*
 ** Read one of the CAN transmit or receive buffers in the MCP2510.
 ** The result is printed.
 */
void mcp_read_buffer( uchar buffer )
{
    uchar loopCnt, dlc, rtr, ext;
    uchar databytes[8];
    unsigned long can_id;
    mcp_read_can ( buffer, &ext, &can_id, &dlc, &rtr, databytes );
    if( ext == 1 ) {
        printf("CAN Id = 0x%08lX (Extended)", can_id);
    } else {
        printf("CAN Id = 0x%04X (Standard)", (unsigned int) can_id );
    }
    printf(", with dlc=%d and RTR=%d\n\r", dlc, rtr );
    if (buffer > 3) {
        printf("Data in receive buffer %d is:", buffer-3 );
    } else {
        printf("Data in transmit buffer %d is:", buffer );
    }

    for ( loopCnt=0 ; loopCnt < dlc ; loopCnt++ ) {
        printf(" %02X", databytes[loopCnt] );
    }
    printf("\n\r");
}


/*
 ** Read one of the transmit buffers in the MCP2510.
 */
int mcp_read_tbuf ( uchar buffer )
{
    if ( (buffer < 1) || (buffer > 3) ) {
        printf("The only buffers supported are 1,2 and 3, not %d\n\r", buffer );
        return 255;
    }
    mcp_read_buffer( buffer );
    return 0;
}

/*
 ** Read one of the receive buffers in the MCP2510.
 */
int mcp_read_rbuf ( uchar buffer )
{
    if ( (buffer < 1) || (buffer > 2) ) {
        printf("The only receive buffers supported are 1 and 2, not %d\n\r",
               buffer );
        return 255;
    }
    mcp_read_buffer(buffer + 3);
    return 0;
}