神坛，TM1638死活不显示任何东西，是什么原因呢？-第8页回答

神坛，TM1638死活不显示任何东西，是什么原因呢？

2020-01-23 14:29发布

8475 48

数码管用的是共阴数码管，单片机STC11F04E，数码管一直没有任何显示，调试了一天，没进展，求神坛指点。
现在要求不高，只要数码管有一点显示就行啊

下载界面.png (83.06 KB, 下载次数: 0) 下载附件 2013-2-7 19:37 上传

#include <intrins.h>
#include <STC11F04E.H>
#include <stdio.h>
#define SYSTEM_CLK 11520000
void uart_init(unsigned int baud) {
SCON = 0x50;
TMOD |= 0x20;
TH1 = 256 - SYSTEM_CLK / baud / 384;
TR1 = 1;
TI = 1;
}
void Delay500ms() //@11.0592MHz
{
unsigned char i, j, k;
i = 22;
j = 3;
k = 227;
do
{
do
{
while (--k);
} while (--j);
} while (--i);
}
void _delay_us(unsigned char i) //@11.0592MHz
{
while(i--)
{
_nop_();
}
}
sbit STB = P3^3;
sbit CLK = P3^4;
sbit DIO = P3^5;
sbit led1 = P1^6;
sbit led2 = P1^7;
#define DIO_high do{DIO=1;}while(0)
#define DIO_low do{DIO=0;}while(0)
#define CLK_high do{CLK=1;}while(0)
#define CLK_low do{CLK=0;}while(0)
#define STB_high do{STB=1;}while(0)
#define STB_low do{STB=0;}while(0)
unsigned char tab[]={0x3F,0x06,0x5B,0x4F,0x66,0x6D,0x7D,0x07,0x7F,0x6F,0x77,0x7C,0x39,0x5E,0x79,0x71};
void TM1638_Write(unsigned char DATA) //写数据函数
{
unsigned char i;
for(i=0;i<8;i++)
{
CLK_low;
if(DATA&0X01)
DIO_high;
else
DIO_low;
DATA>>=1;
CLK_high;
_delay_us(1);
}
}
void Write_COM(unsigned char cmd) //发送命令字
{
STB_low;
TM1638_Write(cmd);
STB_high;
_delay_us(1);
}
void init_TM1638(void)
{
unsigned char i;
Write_COM(0x8F);//亮度
Write_COM(0x40);
STB_low;
TM1638_Write(0xc0);
for(i=0;i<16;i++)
TM1638_Write(0x00);
STB_high;
}
int main(void)
{
unsigned int i=0,j=0;
unsigned char flag=0;
init_TM1638();
uart_init(9600);
Delay500ms();
while(1)
{
for(i=0; i<8; i++)
{
printf("i=%2d; this is a test. ",i);
Write_COM(0x8F);//亮度
Write_COM(0x40);
STB_low;
TM1638_Write(0xc0);
for(j=0;j<16;j++)
{
TM1638_Write(i);
}
STB_high;
Delay500ms();
}
}
}