m54455evb_sdram_test.c

来自「Freescale MCF5445evb 参考测试代码」· C语言 代码 · 共 66 行

/*!
 * \file    m54455evb_sdram_test.c
 * \brief   Test the SDRAM interface on the M54455EVB (aka Jamaica)
 * \version $Revision: 1.1 $
 * \author  Michael Norman
 */
 
#include "common.h"
#include "m54455evb_fat.h"
                
static int test_data[] = {
    0x00112233, 0x44556677, 0x8899AABB, 0xCCDDEEFF,
    0x00001111, 0x22223333, 0x44445555, 0x66667777,
    0x88889999, 0xAAAABBBB, 0xCCCCDDDD, 0xEEEEFFFF,
    0x00000000, 0x11111111, 0x22222222, 0x33333333,
    0x44444444, 0x55555555, 0x66666666, 0x77777777
};

/********************************************************************/
/*!
 * \brief   SDRAM Test
 * \return  0 if the tests was successful; non-zero otherwise
 */
int
sdram_test(void)
{
	int i;

    if (memtest_databus_32((uint32 *)SDRAM_ADDRESS)                   ||
        memtest_databus_32((uint32 *)SDRAM_ADDRESS+1)                 ||
        memtest_databus_32((uint32 *)SDRAM_ADDRESS+2)                 ||
        memtest_databus_32((uint32 *)SDRAM_ADDRESS+3)                 ||
        memtest_databus_32((uint32 *)(SDRAM_ADDRESS+SDRAM_SIZE/2))    ||
        memtest_databus_32((uint32 *)(SDRAM_ADDRESS+SDRAM_SIZE/2)+1)  ||
        memtest_databus_32((uint32 *)(SDRAM_ADDRESS+SDRAM_SIZE/2)+2)  ||
        memtest_databus_32((uint32 *)(SDRAM_ADDRESS+SDRAM_SIZE/2)+3))
        return 1;
    
    if (memtest_addrbus_32((uint32 *) (SDRAM_ADDRESS+(SDRAM_SIZE/64*31)), 
                          SDRAM_SIZE/32))
        return 2;
        
    if (memtest_device_32((uint32 *) (SDRAM_ADDRESS+(SDRAM_SIZE/64*31)), 
                          SDRAM_SIZE/32))
        return 3;

    /* Clear a small portion of SDRAM */
    for (i = 0; i < sizeof(test_data); i+=4)
        *(uint32*)(SDRAM_ADDRESS + i) = 0;
    
    /* burst from SRAM to SDRAM */
    mcf5xxx_move_line((ADDRESS)&test_data[0], SDRAM_ADDRESS + 0);
    mcf5xxx_move_line((ADDRESS)&test_data[4], SDRAM_ADDRESS + 16);
    mcf5xxx_move_line((ADDRESS)&test_data[8], SDRAM_ADDRESS + 32);
    mcf5xxx_move_line((ADDRESS)&test_data[12], SDRAM_ADDRESS + 48);
    mcf5xxx_move_line((ADDRESS)&test_data[16], SDRAM_ADDRESS + 64);

    for (i = 0; i < 80/4; i++)
    {
        if (test_data[i] != *(uint32 *)(SDRAM_ADDRESS + i*4))
            return 4;
    }
    
    return 0;
}
/********************************************************************/