dram.c

来自「一个基于三星S3C2413的全部驱动程序」· C语言 代码 · 共 22 行

#include "Option.h"
#include "2413addr.h"
#include "DRAM.h"

void PreChangeSDRAMParameter(void)
{
	SetREFRESH(0x20);
	
	SetPARAMETER( 0xf, 0xf, 0x3, 0x3,3);
	
}

void ChangeSDRAMParameter(unsigned int hclk)
{
	//SetREFRESH(hclk/1000*tREFRESH/100000);
	SetREFRESH(hclk/1000*780/100000);
	
	SetPARAMETER( (hclk/1000*tRAS-1)/1000000, (hclk/1000*tRC-1)/1000000, (hclk/1000*tRCD-1)/1000000, (hclk/1000*tRP-1)/1000000, CL);
	//SetPARAMETER( (hclk/1000*60-1)/1000000, (hclk/1000*90-1)/1000000, (hclk/1000*30-1)/1000000, (hclk/1000*30-1)/1000000);
}