nios中SDRAM，FLASH测试代码

/*
    Author: gbing163@163.com
    Date:   2012-5-21
*/
#include "sys/alt_stdio.h"
#include "system.h"

#define SDRAM_TEST
//#define FLASH_TEST

#ifdef SDRAM_TEST
#define TEST_OFFSET_START		0
#define SDRAM_TEST_START		0
#define SDRAM_SIZE				0x800000

static int test_sdram();
#endif

#ifdef FLASH_TEST
static void test_flash();
#endif

int main()
{
	alt_putstr("Hello from Nios II!rn");

#ifdef FLASH_TEST
	test_flash();
#endif

#ifdef SDRAM_TEST
	test_sdram();
#endif

	alt_putstr("------------------------------------------rn");
	/* Event loop never exits. */
	while (1);

	return 0;
}

#ifdef SDRAM_TEST
static int test_sdram()
{
	unsigned long i;
	unsigned long test_off = TEST_OFFSET_START;
	volatile unsigned long * rambase = (unsigned long*)SDRAM_0_BASE;
	unsigned long u32;


#if 0
	*rambase = 0xffffffff;
	if(*rambase != 0xffffffff)
	{
		alt_printf("Data lines error.rn");
		return(-1);
	}
#endif

#if 0
	for(i = 0; i < 20; i++)
	{
		u32 = *(unsigned long*)0x02013ff8;
		alt_printf("%x,",u32);
	}

	alt_printf("rn");
	while(1);
#endif


while(1)
{
#if 1
	rambase  = (unsigned long*)SDRAM_0_BASE;
	for(i = SDRAM_TEST_START; i < SDRAM_SIZE; i++)
	{
		*rambase = i + test_off;

		u32 = *rambase;

		if(u32 != i + test_off)
		{
			alt_printf("Err:%xrn",i * 4);

		}

		rambase++;
	}
#endif


	rambase  = (unsigned long*)SDRAM_0_BASE;
	for(i = SDRAM_TEST_START; i < SDRAM_SIZE; i++)
	{
		u32 = *rambase;
		if(u32 != i + test_off)
		{
			alt_printf("ram is: %x,i = %xrn",u32,i);

		}

		rambase++;
	}

	alt_printf("Test SDRAM OK,off = 0x%x.rn",test_off);

	test_off++;
}//while(1);

	return 0;
}
#endif


//-----------------------------------------------------------------
#ifdef FLASH_TEST

#define FLASH_SIZE		0x80000  //per 4 bytes
#define SEC_NUM			39
#define SEC_SIZE		(32 * 1024)  //64K bytes

#define ADDR0 (0x555 * 2)
#define ADDR1 (0xaaa * 2)

void Data_polling(void)
{
	unsigned short flash_data;
	do
	{
			flash_data = *(unsigned short *)(CFI_FLASH_0_BASE + ADDR0);
	}while(!(flash_data & 0x80));

}

void Delay(long i)
{
	while(i--);
}

void flash_pid_entry(void)
{
	*(unsigned short *)(CFI_FLASH_0_BASE+ADDR0)=0x00aa;
	*(unsigned short *)(CFI_FLASH_0_BASE+ADDR1)=0x0055;
	*(unsigned short *)(CFI_FLASH_0_BASE+ADDR0)=0x0090;

	Delay(10);
}

void flash_ready(void)
{
	*(unsigned short *)(CFI_FLASH_0_BASE+ADDR0)=0x00aa;
	*(unsigned short *)(CFI_FLASH_0_BASE+ADDR1)=0x0055;
	*(unsigned short *)(CFI_FLASH_0_BASE+ADDR0)=0x00f0;

	Delay(10);
}


void Toggle_bit(void)
{
	unsigned short flash_data1,flash_data2;
	do
	{
		flash_data1 = *(unsigned short *)CFI_FLASH_0_BASE;
		Delay(10);
		flash_data2 = *(unsigned short *)CFI_FLASH_0_BASE;
	}while((flash_data1 & 0x40) != (flash_data2 & 0x40));
	Delay(10);
}



static int check_chip_erase()
{
	int i;
	unsigned long u32;
	unsigned long *flash_base = (unsigned long*)CFI_FLASH_0_BASE;

	for(i = 0; i < FLASH_SIZE; i++)
	{
		u32 = *(flash_base + i * 4);
		if(u32 != 0xffffffff)
			alt_printf("Read: 0x%x,i:%xrn",i);
	}
	alt_putstr("Check earse ok.rn");

	return 0;
}

//get sector start addr
unsigned int get_sec_base(unsigned int sec_i)
{
	if(sec_i < 8)
		return(0x2000 * sec_i);
	else
		return((sec_i - 7) * 0x10000);
}

static void test_flash()
{
	int i,j;
	unsigned short u16;
	volatile unsigned long flash_base = CFI_FLASH_0_BASE;
	unsigned short off = 0;
	unsigned int sec_base;
	unsigned short manid,devid;

	flash_pid_entry();

	manid = *(unsigned short *)(CFI_FLASH_0_BASE);
	devid = *(unsigned short *)(CFI_FLASH_0_BASE + 2);
	alt_printf("ManID(001Fh): 0x%xrn",manid);
	alt_printf("DevID(00C0h): 0x%xrn",devid);

	alt_printf("Q(51h): 0x%xrn",*(unsigned short *)(CFI_FLASH_0_BASE + 0x10 * 2));
	alt_printf("R(52h): 0x%xrn",*(unsigned short *)(CFI_FLASH_0_BASE + 0x11 * 2));
	alt_printf("Y(59h): 0x%xrn",*(unsigned short *)(CFI_FLASH_0_BASE + 0x12 * 2));


	flash_ready();

	for(i = 0; i < SEC_NUM; i++)
	{
		sec_base = get_sec_base(i);

		//Erase sec
		alt_printf("Erase Sec 0x%xrn",i);
		*(unsigned short *)(flash_base + ADDR0)=0x00aa;
		*(unsigned short *)(flash_base + ADDR1)=0x0055;
		*(unsigned short *)(flash_base + ADDR0)=0x0080;
		*(unsigned short *)(flash_base + ADDR0)=0x00aa;
		*(unsigned short *)(flash_base + ADDR1)=0x0055;
		*(unsigned short *)(flash_base + sec_base) = 0x30;
		Data_polling();


		//check sector erase
		for(j = 0; j < SEC_SIZE; j++)
		{
			u16 = *(unsigned short *)(flash_base + sec_base + j * 2);
			if(u16 != 0xffff)
			{
				alt_printf("Sec: 0x%x,Read: 0x%x,i,u16,j);
			}
		}


		//program
		alt_printf("prog...rn");
		for(j = 0; j < SEC_SIZE; j++)
		{
			*(unsigned short *)(flash_base + ADDR0)=0x00aa;			// write a hex data to flash
			*(unsigned short *)(flash_base + ADDR1)=0x0055;
			*(unsigned short *)(flash_base + ADDR0)=0x00a0;
			*(unsigned short *)(flash_base + sec_base + j * 2) = j + off;

			Toggle_bit();
		}

		//check word
		for(j = 0; j < SEC_SIZE; j++)
		{
			u16 = *(unsigned short *)(flash_base + sec_base + j * 2);
			if(u16 != j + off)
				alt_printf("0x%x: Prog 0x%x,Read 0x%xrn",j,j + off,u16);
		}

		off++;
	}

	//erase chip
	*(unsigned short *)(flash_base + ADDR0)=0x00aa;
	*(unsigned short *)(flash_base + ADDR1)=0x0055;
	*(unsigned short *)(flash_base + ADDR0)=0x0080;
	*(unsigned short *)(flash_base + ADDR0)=0x00aa;
	*(unsigned short *)(flash_base + ADDR1)=0x0055;
	*(unsigned short *)(flash_base + ADDR0)=0x0010;
	Data_polling();
	check_chip_erase();


	alt_putstr("Test Flash OK.rn");
}
#endif  //#ifdef FLASH_TEST