ledarray.c

可以观察到,发光二级管阵列显示从0--9的计数.

#include "DSP281x_Device.h"     // DSP281x Headerfile Include File
#include "DSP281x_Examples.h"   // DSP281x Examples Include File
#include "f2812a.h"

#define LEDS *(int *)0xc0000
#define CTRGR *(int *)0x108000
#define CTRLCDCMDR *(int *)0x108001
#define CTRKEY *(int *)0x108001
#define CTRLCDCR *(int *)0x108002
#define CTRCLKEY *(int *)0x108002
#define CTRLCDLCR  *(int *)0x108003
#define CTRLCDRCR *(int *)0x108004
#define CTRLA *(int *)0x108005
#define CTRLR *(int *)0x108007


void Delay(unsigned int nTime);		// 延时子程序
void RefreshLEDArray();			// 刷新显示
void SetLEDArray(int nNumber);		// 修改显示内容

unsigned char ledbuf[8],ledx[8];
unsigned char ledkey[10][8]=
{
	{0x00,0x00,0x7C,0x82,0x82,0x82,0x7C,0x00},	//0
	{0x00,0x00,0x00,0x84,0xFE,0x80,0x00,0x00},	//1
	{0x00,0x00,0x84,0xC2,0xA2,0x92,0x8C,0x00},	//2
	{0x00,0x00,0x44,0x92,0x92,0x92,0x6C,0x00},
	{0x00,0x00,0x30,0x28,0x24,0xFE,0x20,0x00},
	{0x00,0x00,0x4E,0x92,0x92,0x92,0x62,0x00},
	{0x00,0x00,0x7C,0x92,0x92,0x92,0x64,0x00},
	{0x00,0x00,0x02,0xC2,0x32,0x0A,0x06,0x00},
	{0x00,0x00,0x6C,0x92,0x92,0x92,0x6C,0x00},
	{0x00,0x00,0x4C,0x92,0x92,0x92,0x7C,0x00}
};

void main(void)
{
    int nCount;
	InitSysCtrl();
	CTRGR=0x80;		// 初始化ICETEK-CTR
	CTRGR=0x0;
	CTRGR=0x80;
	CTRLR=0;			// 关闭东西方向的交通灯
	CTRLR=0x40;	// 关闭南北方向的交通灯
	CTRLR=0xc1;
	for ( nCount=0;nCount<8;nCount++ )
	{
		ledbuf[nCount]=0x0ff;		// 显示为空白
		ledx[nCount]=(nCount<<4);	// 生成显示列控制字
	}
	RefreshLEDArray();
	nCount=0;
	for (;;)
	{
		SetLEDArray(nCount);
		Delay(256);
		nCount++;
		nCount%=10;
	} 

} 	

void Delay(unsigned int nDelay)
{
	int ii,jj,kk=0;
	for ( ii=0;ii<nDelay;ii++ )
	{
		for ( jj=0;jj<64;jj++ )
		{
			RefreshLEDArray();
			kk++;
		}
	}
}

void RefreshLEDArray()
{
	int i;
	for ( i=0;i<8;i++ )
	{
		CTRGR=ledx[i];
		CTRLA=ledbuf[i];
	}
}

void SetLEDArray(int nNumber)
{
	int i;
	for ( i=0;i<8;i++ )
		ledbuf[i]=~ledkey[nNumber][7-i];
}