关于液晶1602的问题，液晶只是亮，没有显示，代码已经直接让液晶显示了，但是还是没显示，不知道是软件的问题还是硬件问题

ZungwingCeoi · 发表于 2018-9-21 17:29:26

这是主程序

#include "delay.h"
#include "sys.h"
#include "usart.h"
#include "LCD1602.h"
//³¬Éù²¨Ó²¼þ½Ó¿Ú¶¨Òå
#define HCSR04_PORT    GPIOB
#define HCSR04_CLK    RCC_APB2Periph_GPIOB
#define HCSR04_TRIG    GPIO_Pin_11
#define HCSR04_ECHO    GPIO_Pin_10

#define TRIG_Send  PBout(11)
#define ECHO_Reci  PBin(10)
//³¬Éù²¨¼ÆÊý
u16 msHcCount = 0;

//¶¨Ê±Æ÷2ÉèÖÃ
void hcsr04_NVIC()
{
NVIC_InitTypeDef NVIC_InitStructure;
NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);
NVIC_InitStructure.NVIC_IRQChannel = TIM2_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
}
void NVIC_Configuration(void)       //²»Ð´³öwarning
{
NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);
}
//IO¿Ú³õÊ¼»¯ ¼°ÆäËû³õÊ¼»¯
void Hcsr04Init()
{
TIM_TimeBaseInitTypeDef  TIM_TimeBaseStructure;
GPIO_InitTypeDef GPIO_InitStructure;
RCC_APB2PeriphClockCmd(HCSR04_CLK, ENABLE);

GPIO_InitStructure.GPIO_Pin =HCSR04_TRIG;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
GPIO_Init(HCSR04_PORT, &GPIO_InitStructure);
GPIO_ResetBits(HCSR04_PORT,HCSR04_TRIG);

GPIO_InitStructure.GPIO_Pin = HCSR04_ECHO;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
GPIO_Init(HCSR04_PORT, &GPIO_InitStructure);
GPIO_ResetBits(HCSR04_PORT,HCSR04_ECHO);


RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2, ENABLE);

TIM_DeInit(TIM2);
TIM_TimeBaseStructure.TIM_Period = (1000-1);
TIM_TimeBaseStructure.TIM_Prescaler =(72-1);
TIM_TimeBaseStructure.TIM_ClockDivision=TIM_CKD_DIV1;
TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
TIM_TimeBaseInit(TIM2, &TIM_TimeBaseStructure);

TIM_ClearFlag(TIM2, TIM_FLAG_Update);
TIM_ITConfig(TIM2,TIM_IT_Update,ENABLE);
hcsr04_NVIC();
TIM_Cmd(TIM2,DISABLE);
}
//´ò¿ª¶¨Ê±Æ÷2
static void OpenTimerForHc()
{
TIM_SetCounter(TIM2,0);
msHcCount = 0;
TIM_Cmd(TIM2, ENABLE);
}
//¹Ø±Õ¶¨Ê±Æ÷2
static void CloseTimerForHc()
{
TIM_Cmd(TIM2, DISABLE);
}
//¶¨Ê±Æ÷2ÖÕÖÐ¶Ï
void TIM2_IRQHandler(void)
{
if (TIM_GetITStatus(TIM2, TIM_IT_Update) != RESET)
{
   TIM_ClearITPendingBit(TIM2, TIM_IT_Update  );
   msHcCount++;
}
}
//»ñÈ¡¶¨Ê±Æ÷2¼ÆÊýÆ÷Öµ
u32 GetEchoTimer(void)
{
u32 t = 0;
t = msHcCount*1000;
t += TIM_GetCounter(TIM2);
TIM4->CNT = 0;
delay_ms(50);
return t;
}
//Í¨¹ý¶¨Ê±Æ÷2¼ÆÊýÆ÷ÖµÍÆËã¾àÀë
float Hcsr04GetLength(void )
{
u32 t = 0;
int i = 0;
float lengthTemp = 0;
float sum = 0;
while(i!=5)
{
   TRIG_Send = 1;
   delay_us(20);
   TRIG_Send = 0;
   while(ECHO_Reci == 0);
   OpenTimerForHc();
   i = i + 1;
   while(ECHO_Reci == 1);
   CloseTimerForHc();
   t = GetEchoTimer();
   lengthTemp = ((float)t/58.0);//cm
         sum = lengthTemp + sum ;

}
lengthTemp = sum/5.0;
return lengthTemp;
}


//²âÊÔÖ÷º¯Êý
int main(void)
{
u8 a,b,c,d;
u8 str[6]={0};

u8 length;
delay_init();    //ÑÓÊ±º¯Êý³õÊ¼»¯
NVIC_Configuration();
SystemInit();
uart_init(9600);  //´®¿Ú³õÊ¼»¯9600
Hcsr04Init();
LCD1602_Init();
LCD1602_ClearScreen();
LCD1602_Show_Str(4, 1, "598");
while(1)
{
length = Hcsr04GetLength();
a=(length/1000);
b=((length%1000)/100);
c=((length%100)/10);
d=(length%10);
str[0]=a+0x30;
str[1]=b+0x30;
str[2]=c+0x30;
str[3]=d+0x30;
  str[4]='c';
  str[5]='m';

LCD1602_Show_Str(4, 1, "598");

delay_ms(1000);
}
}

ZungwingCeoi · 发表于 2018-9-21 17:30:05

这是1602的程序

#include"LCD1602.h"
#include"sys.h"
#include "delay.h"
#include "stdio.h"

void GPIO_Configuration(void)
{
GPIO_InitTypeDef  GPIO_InitStructure;
   RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA|RCC_APB2Periph_GPIOB, ENABLE);

   GPIO_InitStructure.GPIO_Pin = GPIO_Pin_5|GPIO_Pin_6|GPIO_Pin_7;
   GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
   GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
   GPIO_Init(GPIOB, &GPIO_InitStructure);

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0|GPIO_Pin_1|GPIO_Pin_2|GPIO_Pin_3|GPIO_Pin_4|GPIO_Pin_5|GPIO_Pin_6|GPIO_Pin_7;
   GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
   GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
   GPIO_Init(GPIOA, &GPIO_InitStructure);
}

void LCD1602_Wait_Ready(void)
{
u8 sta;

DATAOUT(0xff);
LCD_RS_Clr();
delay_ms(10);
LCD_RW_Set();
delay_ms(10);
do
{
LCD_EN_Set();
delay_ms(5);
  sta = GPIO_ReadInputDataBit(GPIOA, GPIO_Pin_7);
LCD_EN_Clr();
}while(sta & 0x80);
}

void LCD1602_Write_Cmd(u8 cmd)
{
LCD1602_Wait_Ready();
delay_ms(10);
LCD_RS_Clr();
delay_ms(10);
LCD_RW_Clr();
delay_ms(10);
DATAOUT(cmd);
delay_ms(10);
LCD_EN_Set();
delay_ms(10);
LCD_EN_Clr();
//printf("%d",cmd);
}

void LCD1602_Write_Dat(u8 dat)
{
LCD1602_Wait_Ready();
LCD_RS_Set();
delay_ms(10);
LCD_RW_Clr();
delay_ms(10);
DATAOUT(dat);
delay_ms(10);
LCD_EN_Set();
delay_ms(10);
LCD_EN_Clr();
delay_ms(10);
}

void LCD1602_ClearScreen(void)
{
LCD1602_Write_Cmd(0x01);
}

void LCD1602_Set_Cursor(u8 x, u8 y)
{
u8 addr;

if (y == 0)
addr = 0x00 + x;
else
addr = 0x40 + x;
LCD1602_Write_Cmd(addr | 0x80);
}

void LCD1602_Show_Str(u8 x,u8 y,u8 *str)//?????
{
      LCD1602_Set_Cursor(x,y);
      while(*str!='\0')
      {
            LCD1602_Write_Dat(*str++);
      }
}
/*void LCD1602_Show_Str(u8 x, u8 y, u8 str[])
{
unsigned char i=0;
u8 addr;
LCD1602_Set_Cursor(x, y);

if (y == 0)
addr = 0x00 + x;
else
addr = 0x40 + x;

while(str[i]== '\0')
{
LCD1602_Write_Cmd(addr+i);
LCD1602_Write_Dat(str[i]);
i++;
}
}*/

void LCD1602_Init(void)
{
GPIO_Configuration();
LCD1602_Write_Cmd(0x38);
LCD1602_Write_Cmd(0x0c);
LCD1602_Write_Cmd(0x06);
LCD1602_Write_Cmd(0x01);

}