m54455evb_spiflash_test.c

Freescale MCF5445evb 参考测试代码

/*!
 * \file    spiflash_test.c
 * \brief   Test the SPI Flash interface on the M54455EVB (aka Jamaica)
 * \version $Revision: 1.1 $
 * \author  Michael Norman
 */
 
#include "common.h"
#include "dspi.h"
#include "m54455evb_fat.h"

/********************************************************************/
/*
 * Instruction/Command Codes
 */
#define SPIFLASH_WREN       0x06
#define SPIFLASH_WRDI       0x04
#define SPIFLASH_RDID       0x9F
#define SPIFLASH_RDSR       0x05
#define SPIFLASH_WRSR       0x01
#define SPIFLASH_READ       0x03
#define SPIFLASH_FAST_READ  0x0B
#define SPIFLASH_PP         0x02
#define SPIFLASH_SE         0xD8
#define SPIFLASH_BE         0xC7
#define SPIFLASH_DP         0xB9
#define SPIFLASH_RES        0xAB

/*
 * Serial Flash Status Register
 */
#define SPIFLASH_SR_SRWD    0x80
#define SPIFLASH_SR_BP2     0x10
#define SPIFLASH_SR_BP1     0x08
#define SPIFLASH_SR_BP0     0x04
#define SPIFLASH_SR_WEL     0x02
#define SPIFLASH_SR_WIP     0x01
#define SPIFLASH_SR_BP(x)   ((x & 0x7) << 2)

/********************************************************************/
/*!
 * \brief   SPI Flash Test
 * \return  0 if the tests was successful; non-zero otherwise
 */
int
spiflash_test (void)
{
    uint16 rxdata[20];
    
    dspi_init();
    
    /* Read SR */
    while ((MCF_DSPI_DSR & 0x000000F0) != 0) {dspi_rx();}
    dspi_tx(SPIFLASH_RDSR, 1, 0x80);
    dspi_rx();
    dspi_tx(0, 1, 0x00);
    rxdata[0] = dspi_rx();
    if ((MCF_DSPI_DSR & 0x000000F0) != 0)
        return 1;

    /* Read ID */
    dspi_tx(SPIFLASH_RDID, 1, 0x80);
    dspi_tx(0, 1, 0x80);
    dspi_tx(0, 1, 0x80);
    dspi_tx(0, 1, 0x00);
    dspi_rx();
    rxdata[0] = dspi_rx();
    rxdata[1] = dspi_rx();
    rxdata[2] = dspi_rx();
    if (rxdata[0] != 0x20 || rxdata[1] != 0x20 || rxdata[2] != 0x15)
        return 2;
    
    /* pass */
    return 0;
}
/********************************************************************/