init_sdram.c

OV7660驱动程序

// init_sdram.c

#include <cdefBF561.h>
#include <sys/exception.h>
#include <ccblkfn.h>

void init_sdram(void)
{
	// Check if already enabled
	if (*pEBIU_SDSTAT & SDRS)
	{
		*pEBIU_SDBCTL = 0x00000015;					// SDRAM Memory Bank Control Register
		ssync();
		*pEBIU_SDRRC =  0x00000817;					// SDRAM Refresh Rate Control Register
		ssync();
		*pEBIU_SDGCTL = 0x0091998b;					// SDRAM Memory Global Control Register
		ssync();
	}
}