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標題: 為什么我的主函數這樣寫，在51單片機液晶上按上下鍵沒有任何顯示? [打印本頁]

作者: wqd0829 時間: 2019-10-19 11:45
標題: 為什么我的主函數這樣寫，在51單片機液晶上按上下鍵沒有任何顯示?
Keil4編寫環境：A/D數模轉換和按鍵應用操作顯示到Lcd1602上，子程序Lcd1602.c，keyboard.c，I2C.c程序略，跪求主程序
程序要求實現：按上鍵查詢設定的電壓值上下限
按下鍵查詢當前的電壓值（當前電壓值是滑動變阻器所配置的電壓值）
數據采集器件用的是PCF8591測AIN0的值
為什么我的主函數這樣寫，在51液晶上按上下鍵沒有任何顯示，跪求主函數，開發板是金三角開發板

#include <reg52.h>
sbit BUZZ = P1^6;
bit flag300ms = 1;
bit enBuzz = 0;
unsigned char T0RH = 0;
unsigned char T0RL = 0;
unsigned int CountDown = 0;
void ConfigTimer0(unsigned int ms);
unsigned char GetADCValue(unsigned char chn);
void ValueToString(unsigned char *str, unsigned char val);
extern void I2CStart();
extern void I2CStop();
extern void KeyScan();
extern void KeyDriver();
extern unsigned char I2CReadACK();
extern unsigned char I2CReadNAK();
extern bit I2CWrite(unsigned char dat);
extern void InitLcd1602();
extern void LcdShowStr(unsigned char x, unsigned char y, unsigned char *str);
void main()
{
EA = 1;
ConfigTimer0(10);
InitLcd1602();
// LcdShowStr (0, 0, "moli");
while(1)
{
   KeyDriver();
}
}
unsigned char GetADCValue (unsigned char chn)
{
   unsigned char val;
   I2CStart();
if (!I2CWrite (0x48<<1))
{
      I2CStop();
      return 0;
}
I2CWrite (0x40 | chn);
I2CStart();
I2CWrite ((0x48<<1) | 0x01);
I2CReadACK();
val = I2CReadNAK();
I2CStop();
return val;
}
void ValueToString(unsigned char *str, unsigned char val)
{

  val = (val * 25) / 55;
  str[0] = (val/10) + '0';
  str[1] = '.'; //С????
  str[2] = (val%10) + '0';
  str[3] = 'V';
  str[4] = '\0';
}
void KeyTaAction()
{
unsigned char val;
unsigned char str[10];
InitLcd1602();
LcdShowStr (0, 0, "TABANXINHAO");
   while (1)
{
      if (flag300ms)
   {
      flag300ms = 0;

      val = GetADCValue(0);
      ValueToString(str, val);
      LcdShowStr(0, 1, str);
   if (val >= 200)
   {
      enBuzz = 1;
      if (enBuzz)
         BUZZ = ~BUZZ;
   }
   else
      BUZZ = 1;
}
  }
}
void KeyAction (unsigned char keycode)
{
if(keycode == 0x26)
{
   KeyTaAction();
}
  else if (keycode == 0x28)
{
   LcdShowStr (0, 0, "MAX");
   LcdShowStr (0, 1, 2^5);
   LcdShowStr (6, 0, "MIN");
   LcdShowStr (6, 1, 0^0);
}
}
void ConfigTimer0(unsigned int ms)
{
unsigned long tmp;
tmp = 11059200 / 12;
tmp = (tmp * ms) / 1000;
tmp = 65536 - tmp;
tmp = tmp + 12;
T0RH = (unsigned char)(tmp >> 8);
T0RL = (unsigned char)tmp;
TMOD &= 0xF0;
TMOD |= 0x01;
TH0 = T0RH;
TL0 = T0RL;
ET0 = 1;
TR0 = 1;
}
void InterruptTimer0() interrupt 1
{
static unsigned char tmr300ms = 0;
TH0 = T0RH;
TL0 = T0RL;
tmr300ms++;
if (tmr300ms >= 30)
{
   tmr300ms = 0;
  flag300ms = 1;
}
}

作者: 來51學習2 時間: 2019-10-19 12:40
1、沒有看到你寫的液晶驅動程序
2、沒有看到你寫的AD轉換程序
3、沒有看到有按鍵定義

作者: zycstc 時間: 2019-10-19 12:54
要先確定是不是LCD1602的程序問題

作者: wqd0829 時間: 2019-10-19 14:37
#include <reg52.h> #define LCD1602_DB P0 sbit LCD1602_RS = P1^0; sbit LCD1602_RW = P1^1; sbit LCD1602_E = P1^5; /*???????????*/ void LcdWaitReady() { unsigned char sta; LCD1602_DB = 0xFF; LCD1602_RS = 0; LCD1602_RW = 1; do{ LCD1602_E = 1; sta = LCD1602_DB; //??????? LCD1602_E = 0; }while(sta & 0x80); //Bit7????1?????????????????????????0?? } /*??LCD1602???д??????????cmd-??д?????????*/ void LcdWriteCmd(unsigned char cmd) { LcdWaitReady(); LCD1602_RS = 0; LCD1602_RW = 0; LCD1602_DB = cmd; LCD1602_E = 1; LCD1602_E = 0; } /*??LCD1602???д???????????dat-??д???????*/ void LcdWriteDat(unsigned char dat) { LcdWaitReady(); LCD1602_RS = 1; LCD1602_RW = 0; LCD1602_DB = dat; LCD1602_E = 1; LCD1602_E = 0; } /*???????RAM?????????????λ?????x,y??-????????????????*/ void LcdSetCursor(unsigned char x, unsigned char y) { unsigned char addr; if (y == 0) addr = 0x00 + x; else addr = 0x40 + x; LcdWriteCmd(addr | 0x80); } /*???????????????????x,y??-????????????????str-????????*/ void LcdShowStr(unsigned char x, unsigned char y, unsigned char *str) { LcdSetCursor(x, y); while (*str != '\0') { LcdWriteDat(*str++); } } /*?????1602???*/ void InitLcd1602() { LcdWriteCmd(0x38); LcdWriteCmd(0x0C); LcdWriteCmd(0x06); LcdWriteCmd(0x01); }

作者: wqd0829 時間: 2019-10-19 14:46

來51學習2 發表于 2019-10-19 12:40
1、沒有看到你寫的液晶驅動程序
2、沒有看到你寫的AD轉換程序
3、沒有看到有按鍵定義

大佬，我重新加上了，重新又發了個懸賞帖，望解答下求51大神
http://www.zg4o1577.cn/bbs/dpj-171595-1.html
(出處: 單片機論壇)

作者: wqd0829 時間: 2019-10-19 14:47

zycstc 發表于 2019-10-19 12:54
要先確定是不是LCD1602的程序問題

求51大神
http://www.zg4o1577.cn/bbs/dpj-171595-1.html
(出處: 單片機論壇)
大佬看這個懸賞貼，程序全部貼上了，，謝謝

歡迎光臨 (http://www.zg4o1577.cn/bbs/)