本人小白，stm32用串口驱动12864不行，不知道哪里出问题了

小鑫好菜

#ifndef __LCD_H
#define __LCD_H

#include "sys.h"

#define SCLK PDout(7)
#define SID PDout(5)
#define CS PDout(11)
#define LCD_PSB PCout(11)
#define LCD_RST PCout(12)


void Delayus(u32 di);
void lcd_config(void);
void lcd_sendbyte(unsigned char bbyte);
void lcd_write_com(unsigned char command);
void lcd_write_dat(unsigned char data);
void lcd_set_XY(unsigned char X,unsigned char Y);
void lcd_print_string(unsigned char X,unsigned char Y,unsigned char *s);
void lcd_init(void);

#endif 



#include "lcd.h"

#include "sys.h"

void Delayus(u32 di)
{
  u32 da,db;
   for(da=0;da<di;da++)
   {
     for(db=0;db<12;db++);
   }
}


void lcd_config(void)
{
  
 GPIO_InitTypeDef  GPIO_InitStructure;
 
 RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOD|RCC_APB2Periph_GPIOC, ENABLE);  

 GPIO_InitStructure.GPIO_Pin = GPIO_Pin_5|GPIO_Pin_7|GPIO_Pin_11;  
 GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;  
 GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;  
 GPIO_Init(GPIOD, &GPIO_InitStructure);  
 

 GPIO_InitStructure.GPIO_Pin = GPIO_Pin_11|GPIO_Pin_12;      
 GPIO_Init(GPIOC, &GPIO_InitStructure);    
 GPIO_SetBits(GPIOC,GPIO_Pin_11);
 GPIO_SetBits(GPIOC,GPIO_Pin_12);
}


void lcd_sendbyte(unsigned char bbyte)
{
  unsigned char i;
  
  for(i=0;i<8;i++)
  {
    if((bbyte)&0x80)
{
 SID=1;
}
else
{
 SID=0;   
}
Delayus(1);
SCLK=1;
Delayus(1);
SCLK=0;
bbyte<<=1;

  }
  Delayus(1);
  
}


void lcd_write_com(unsigned char command)
{
  CS=1;
  lcd_sendbyte(0xf8);
  Delayus(10);
  lcd_sendbyte(command&0xf0);
  Delayus(5);
  lcd_sendbyte((command<<4)&0xf0);
  Delayus(5);
  CS=0;
}


void lcd_write_dat(unsigned char data)
{
  CS=1;
  lcd_sendbyte(0xfa);
  Delayus(10);
  lcd_sendbyte(data&0xf0);
  Delayus(5);
  lcd_sendbyte((data<<4)&0xf0);
  Delayus(5);
  CS=0;
}


void lcd_set_XY(unsigned char X,unsigned char Y)
{
  unsigned char address;
  switch(X)
  {
    case 0: address = 0x80+Y; break;
    case 1: address = 0x80+Y; break;
    case 2: address = 0x90+Y; break;
    case 3: address = 0x88+Y; break;
case 4: address = 0x98+Y; break;
default: address = 0x80 +Y; break;
  }
  lcd_write_com(address);
  Delayus(72);
}

void lcd_print_string(unsigned char X,unsigned char Y,unsigned char *s)
{
  lcd_set_XY(X,Y);
  while(*s)
  {
  lcd_write_dat(*s);
s++;
Delayus(72);
  }
}


void lcd_init(void)
{
  LCD_PSB=0;
  Delayus(5);  
  lcd_write_com(0x30);

  Delayus(5);
  lcd_write_com(0x0c);
  Delayus(5);
  lcd_write_com(0x01);
  Delayus(5);
}

#include "sys.h"
#include "lcd.h"


int main(void)
{ 

  lcd_config();
  lcd_init();
  
  while(1)
  {
 

  
  lcd_print_string(1,1,"123456");
  }
}

 

张鋆

void lcd_config(void),初始化看起来有问题，GPIOC的

FantaSy_

你看下12864的输入电平范围是多少

小鑫好菜

回复【3楼】FantaSy_:
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供电是3.3V的

小鑫好菜

回复【2楼】张鋆:
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哪里有问题啊，求大神详解下 = =

telentmmc

你的12864供电电压要求是5V还是3.3V的？

小鑫好菜

回复【6楼】telentmmc:
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3.3