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標(biāo)題: 自己畫的照度計(jì)仿真電路，LCD不顯示字符請(qǐng)大神指點(diǎn)迷津 [打印本頁]

作者: jeahio 時(shí)間: 2018-4-17 20:35
標(biāo)題: 自己畫的照度計(jì)仿真電路，LCD不顯示字符請(qǐng)大神指點(diǎn)迷津
自己畫的照度計(jì)仿真電路，LCD不顯示字符

77R$}`M}4570)[PWSL4ZNUI.png (15.61 KB, 下載次數(shù): 55)

作者: admin 時(shí)間: 2018-4-18 00:31
應(yīng)該是程序有問題吧，，你應(yīng)該把程序也帖出來的先轉(zhuǎn)移此貼了

作者: jeahio 時(shí)間: 2018-4-18 16:57

admin 發(fā)表于 2018-4-18 00:31
應(yīng)該是程序有問題吧，，你應(yīng)該把程序也帖出來的先轉(zhuǎn)移此貼了

程序是按照例程寫的，查了說有可能是LCD1602忙檢測(cè)的問題，然后把忙檢測(cè)刪了，改成延時(shí)，還是不亮。。
#include<at89x52.h>
#include<stdio.h>
#include<intrins.h>

#define TLC549_CS       P1_1 //片選信號(hào)
#define TLC549_DATAOUT P1_0 //數(shù)據(jù)輸入口
#define TLC549_CLK    P1_2 //時(shí)鐘信號(hào)

#define LCM_RW P2_1 //定義引腳
#define LCM_RS P2_2
#define LCM_E    P2_0
#define LCM_Data    P0
//#define Busy       0x80 //用于檢測(cè)LCM 狀態(tài)字中的Busy 標(biāo)識(shí)
/*------------------------------------------
      子函數(shù)聲明
------------------------------------------*/
void Write_Data_LCM(unsigned char WDLCM);
void Write_Command_LCM(unsigned char WCLCM,BuysC);
void Read_Status_LCM(void);
void LCM_Init(void);
void Set_xy_LCM(unsigned char x, unsigned char y);
void Display_List_Char(unsigned char x, unsigned char y, unsigned char *s);

void delay_nms(unsigned char n)
{
while(n)
{
_nop_();
n--;
}
}

/*=========================    函數(shù)名：Read_Status_LCM()    功  能：忙檢測(cè)函數(shù)

void Read_Status_LCM(void)
{
unsigned char read=0;

        LCM_RW = 1;
        LCM_RS = 0;
LCM_E = 1;
LCM_Data = 0xff;
do    read = LCM_Data;
while(read & Busy);

LCM_E = 0;
}

/*-------------------------------------------
   函數(shù)名：Write_Data_LCM ( )
   功  能：對(duì)LCD 1602 寫數(shù)據(jù)
--------------------------------------------*/
void Write_Data_LCM(unsigned char WDLCM)
{
//      Read_Status_LCM(); //檢測(cè)忙

     LCM_RS = 1;
     LCM_RW = 0;

     LCM_Data &= 0x0f;
     LCM_Data |= WDLCM&0xf0;
     LCM_E = 1; //若晶振速度太高可以在這后加小的延時(shí)
     LCM_E = 1; //延時(shí)
     LCM_E = 0;

     WDLCM = WDLCM<<4;
     LCM_Data &= 0x0f;
     LCM_Data |= WDLCM&0xf0;
     LCM_E = 1;
     LCM_E = 1; //延時(shí)
     LCM_E = 0;
}

/*------------------------------------------------
   函數(shù)名：Write_Command_ LCM ( )
   功  能：對(duì)LCD 1602 寫指令
--------------------------------------------------*/
void Write_Command_LCM(unsigned char WCLCM) //BuysC 為0 時(shí)忽略忙檢測(cè)
{
//      if (BuysC)
//          Read_Status_LCM(); //根據(jù)需要檢測(cè)忙
LCM_RS = 0;
     LCM_RW = 0;

     LCM_Data &= 0x0f;
     LCM_Data |= WCLCM&0xf0;//傳輸高四位
     LCM_E = 1;
LCM_E = 1;
     LCM_E = 0;

     WCLCM = WCLCM<<4; //傳輸?shù)退奈?
     LCM_Data &= 0x0f;
     LCM_Data |= WCLCM&0xf0;
     LCM_E = 1;
     LCM_E = 1;
     LCM_E = 0;
}

/*---------------------------------------------
   函數(shù)名：LCM_Init()       功  能：對(duì)LCD 1602 初始化
----------------------------------------------*/
void LCM_Init(void) //LCM 初始化
{
     LCM_Data = 0;
     Write_Command_LCM(0x28); //三次顯示模式設(shè)置，不檢測(cè)忙信號(hào)
delay_nms(15);
     Write_Command_LCM(0x28);
delay_nms(15);
     Write_Command_LCM(0x28);
delay_nms(15);
//      Write_Command_LCM(0x28,1); //顯示模式設(shè)置,開始要求每次檢測(cè)忙信號(hào)
     Write_Command_LCM(0x08,1); //關(guān)閉顯示
delay_nms(15);
     Write_Command_LCM(0x01,1); //顯示清屏
delay_nms(15);
     Write_Command_LCM(0x06,1); //顯示光標(biāo)移動(dòng)設(shè)置
delay_nms(15);
     Write_Command_LCM(0x0C,1); //顯示開及光標(biāo)設(shè)置
delay_nms(15);
}

/*-------------------------------------------
   函數(shù)名：Set_xy_LCM ()
   功  能：設(shè)定顯示坐標(biāo)位置
--------------------------------------------*/
void Set_xy_LCM(unsigned char x, unsigned char y)
{
     unsigned char address;
if( x == 0 )
address = 0x80+y;
else
address = 0xc0+y;
     Write_Command_LCM(address,1);
}

/*-------------------------------------------
函數(shù)名：Display_List_Char()
  功  能：按指定位置顯示一串字符
--------------------------------------------*/
void Display_List_Char(unsigned char x, unsigned char y, unsigned char *s)
{
     Set_xy_LCM(x,y);
while(*s)
      {
         LCM_Data = *s;
Write_Data_LCM(*s);
s++;
   }
}

void delay_us(unsigned char n)
{
while(n)
{
_nop_();
n--;
}
}
unsigned char ad_conv_tlc549() //TLC549A/D轉(zhuǎn)換子函數(shù)
{
unsigned char i;
unsigned char tmp_data=0;
TLC549_CS=1;    //此時(shí)DATA OUT接口處于高阻態(tài)，I/O CLK不起作用
_nop_();
TLC549_CLK=0;
_nop_();
TLC549_CS=0;    //等待兩個(gè)內(nèi)部時(shí)鐘上升沿和一個(gè)下降沿，單片機(jī)確認(rèn)這一變化，然后自動(dòng)將前一次轉(zhuǎn)換結(jié)果的最高位（D7）位輸出到DATAOUT
_nop_();
_nop_();

for(i=0;i<8;i++)
{
TLC549_CLK=1;
tmp_data=(tmp_data<<1)|TLC549_DATAOUT;
TLC549_CLK=0;
}
TLC549_CS=1;
delay_us(17);
return tmp_data;
}

void init_uart()    //串口初始化子函數(shù)
{
TMOD=0x20;       //use timer1，mode2
TH1=0xfd;          //19200
TL1=0xfd;          //19200
PCON=0x80;
SCON=0x52;
TCON=0x69;
EA=1;             //start uart
}

void main()          //主函數(shù)
{
unsigned char str[32];
unsigned char longstr[16];
float v;
float L;
float u;
init_uart();
LCM_Init();
while(1)
{
v=(int)ad_conv_tlc549()*1.0/256.0*5.0;
u=v*1000;                            //轉(zhuǎn)換成毫伏顯示
L=v*10.0*100.0;                      //標(biāo)定后0~50000lux對(duì)應(yīng)輸出0~5V DC，則Y=10X
sprintf(str,"U=%.2fmV",u);             //顯示電壓值
sprintf(longstr,"L=%.2fLux",L);       //顯示光照強(qiáng)度值，單位為lux
Display_List_Char(0,0,&str);
Display_List_Char(1,0,&longstr);
delay_nms(200);
printf("U=%.2fmV\r\n",u);             //輸出U=？V的字符串，帶小數(shù)點(diǎn)，兩位小數(shù)
}
}

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