基于TM1639的数码管驱动电路.doc

基于TM1639的数码管驱动电路TM1639是一种带键盘扫描接口的LED（发光二极管显示器）驱动控制专用IC,内部集成有MCU数字接口、数据锁存器、LED驱动、键盘扫描等电路。本产品质量可靠、稳定性好、抗干扰能力强。主要适用于家电设备(智能热水器、微波炉、洗衣机、空调、电磁炉)、机顶盒、电子称、智能电表等数码管或LED显示设备.TM1639最大的有点简单好用，硬件电路简单，不需要限流电阻，亮度软件可调，芯片内部自带扫描电路，只需要将要显示的内容写入寄存器，即可稳定显示，非常方面。驱动代码如下：TM1639.c文件#include TM1639.hcode unsigned char dofly=0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07, 0x7f,0x6f,0x77,0x7C,0x58,0x5E,0x79,0x71;sbit TM_STB1=P36;sbit TM_STB2=P14;sbit TM_STB3=P13;sbit TM_SCLK=P20;sbit TM_DIO =P21;void TM_start(unsigned char chip) /开始条件if(chip=0)TM_STB1=0;else if(chip=1)TM_STB2=0;else if(chip=2)TM_STB3=0;TM_SCLK=1;_nop_();_nop_();void TM_stop(unsigned char chip) /结束条件if(chip=0)TM_STB1=1;else if(chip=1)TM_STB2=1;else if(chip=2)TM_STB3=1;TM_SCLK=1;_nop_();_nop_();void TM_send_data(unsigned char x) /送数据低位先传unsigned char i;for(i=0;i=1;void TM_control(unsigned char cmd,unsigned char chip)TM_start(chip);TM_send_data(cmd); TM_stop(chip);void TM_display(unsigned int* time,unsigned long mode)unsigned char i,j;unsigned char temp24;unsigned int temptime6;for(i=0;i6;i+)temptimei=timei;for(j=0;j(i*4+3-j)&0x01 != 0)tempi*4+3-j=doflytemptimei%10;elsetempi*4+3-j=0x00;temptimei/=10;for(i=0;i3;i+)TM_control(CMD_AUTO_ADDR,i);/自动地址TM_start(i);TM_send_data(CMD_START_ADDR); /起始地址for(j=0;j4);elseTM_send_data(tempi*8+j&0x0F);TM_send_data(tempi*8+j4);TM_stop(i);TM_control(LEVEL_1,i);TM1620.h文件#includeSTC12C5A.h#ifndef _TM1639_H_#define _TM1639_H_#define DIG0 0xc0#define DIG1 0xc2#define DIG2 0xc4#define DIG3 0xc6#define DIG4 0xc8#define DIG5 0xca#define DIG6 0xcc#define DIG7 0xce/亮度等级#define LEVEL_OFF 0x80#define LEVEL_1 0x88#define LEVEL_2 0x89#define LEVEL_4 0x8a#define LEVEL_10 0x8b#define LEVEL_11 0x8c#define LEVEL_12 0x8d#define LEVEL_13 0x8e#define LEVEL_14 0x8f#define CMD_AUTO_ADDR 0x40 / 采用自动地址加一方式写显示缓存#define CMD_STATIONARY_ADDR 0x44 /采用地址固定模式写