d_ram.c

来自「EVM2407板卡上的测试程序源码」· C语言 代码 · 共 25 行

#define     data_ram_point    (volatile unsigned int *)0x8000 

extern unsigned int data_ram_check(void); 

unsigned int data_ram_check(void)
{

	unsigned int j = 0;
	
	for( j=0;j <0x8000;j++)
	{
		*(data_ram_point+j) = 0x0000;
		if (*(data_ram_point+j) != 0) return(0);
		*(data_ram_point+j) = 0x5555;
		if (*(data_ram_point+j) != 0x5555) return(0);
		*(data_ram_point+j) = 0x0aaaa;
		if ((*(data_ram_point+j)) != 0x0aaaa) return(0);
		*(data_ram_point+j) = 0x0ffff;
		if ((*(data_ram_point+j)) != 0x0ffff) return(0);
		
	}
	return(1);		


}