uart.c

BF561开发板UART的驱动代码

#include "ccblkfn.h"
#include "sysreg.h"

#include <sys\exception.h>
#include <cdefBF533.h>

#define pCtrlReg1				(volatile unsigned char *)0x20220000
#define pCtrlReg2				(volatile unsigned char *)0x20230000

#define DelayLength 1000000

void Delay(unsigned int DelayValue)
{
	int i;
	for(i=0;i<DelayValue;i++)
	{
		;
	}	
}
void main(void)

{   
	unsigned short tempa=0,tempb=0;
	unsigned char i;

	*pCtrlReg1 = 0xff;
	*pCtrlReg2 = 0xff;
	
	*pEBIU_AMBCTL0	= 0x7bb07bb0;
	*pEBIU_AMBCTL1	= 0x7bb07bb0;
	*pEBIU_AMGCTL	= 0x000f;


	InitUART();

	*pUART_LCR=0x0083;
	ssync();
	tempa = *pUART_DLL;
	tempb = *pUART_DLH;
	*pUART_LCR=0x0003;
	ssync();
	while(1)	 
	{	
		for(i=0;i<256;i++)
			{*pUART_THR = i;
			Delay(DelayLength);
			}
		//*pUART_THR = 0xaa;
		//Delay(DelayLength);
	}
	
}