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LCD+STM32F4xx HELP?

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  • #1

    LCD+STM32F4xx HELP?

    Sao mình sử dụng đoạn code này nạp vào modun STM32F407VG-DISCOVERY để text cái LCD 16x2 mà toàn ra màn hinh sáng hết. Không biết mình sai chổ nào nữa.
    Code "lcd.h"
    Code:
    #include "stm32f4xx.h"

#define LCD_RS_GPIO_PORT GPIOB
#define LCD_RS_GPIO_CLK RCC_AHB1Periph_GPIOB
#define LCD_RS_GPIO_PIN GPIO_Pin_0

#define LCD_RW_GPIO_PORT GPIOB
#define LCD_RW_GPIO_CLK RCC_HB1Periph_GPIOB
#define LCD_RW_GPIO_PIN GPIO_Pin_1

#define LCD_EN_GPIO_PORT GPIOB
#define LCD_EN_GPIO_CLK RCC_AHB1Periph_GPIOB
#define LCD_EN_GPIO_PIN GPIO_Pin_2

#define LCD_D4 GPIO_Pin_4
#define LCD_D5 GPIO_Pin_5
#define LCD_D6 GPIO_Pin_6
#define LCD_D7 GPIO_Pin_7
#define LCD_DATA_GPIO_PINS (LCD_D4|LCD_D5|LCD_D6|LCD_D7)
#define LCD_DATA_GPIO_PORT GPIOB
#define LCD_DATA_GPIO_CLK RCC_AHB1Periph_GPIOB

void lcd_init(void);
void LCD_STROBE(void);
void LCD_DATA(u8 cX );
void lcd_write(u8 c);
void lcd_clear(void);
void lcd_putchar(u8 c);
void lcd_putsf(u8 *c);
void lcd_gotoxy(u8 row,u8 col);

void LCD_Delay_US(__IO uint32_t num)
{
__IO uint32_t index = 0;
for(index = (72 * num); index != 0; index--)
{
}
}

void LCD_STROBE(void)
{
GPIO_SetBits(LCD_DATA_GPIO_PORT, LCD_EN_GPIO_PIN);
LCD_Delay_US(30);
GPIO_ResetBits(LCD_DATA_GPIO_PORT,LCD_EN_GPIO_PIN) ;
LCD_Delay_US(30);
}

void LCD_DATA(u8 cX )
{
GPIO_WriteBit(LCD_DATA_GPIO_PORT, LCD_D4, (BitAction)(cX & 0x01) );
GPIO_WriteBit(LCD_DATA_GPIO_PORT, LCD_D5, (BitAction)((cX & 0x02) >> 1) );
GPIO_WriteBit(LCD_DATA_GPIO_PORT, LCD_D6, (BitAction)((cX & 0x04) >> 2) );
GPIO_WriteBit(LCD_DATA_GPIO_PORT, LCD_D7, (BitAction)((cX & 0x08) >> 3) );
}

void lcd_write(u8 c)
{
LCD_DATA( c >> 4 );
LCD_STROBE();
LCD_DATA( c );
LCD_STROBE();
}

void lcd_clear(void)
{
GPIO_ResetBits(LCD_DATA_GPIO_PORT,LCD_RS_GPIO_PIN) ;
lcd_write(0x01);
LCD_Delay_US(2000);
}

void lcd_putchar(u8 c)
{
GPIO_SetBits(LCD_DATA_GPIO_PORT,LCD_RS_GPIO_PIN);
lcd_write( c );
}

void lcd_putsf(u8 *c)
{
GPIO_SetBits(LCD_DATA_GPIO_PORT,LCD_RS_GPIO_PIN);
while(*c)
lcd_write(*c++);
}

void lcd_gotoxy(u8 row,u8 col)
{
GPIO_ResetBits(LCD_DATA_GPIO_PORT,LCD_RS_GPIO_PIN) ;
switch(row)
{
case 0 : lcd_write( 0x80 + col ) ; //dia chi bat dau + col (cua LCD)
break ;
case 1 : lcd_write( 0xC0 + col ) ;
break ;
case 2 : lcd_write( 0x94 + col ) ;
break ;
case 3 : lcd_write( 0xD4 + col ) ;
break ;
}
}

void lcd_init(void)
{
GPIO_InitTypeDef GPIO_InitStruct;

RCC_APB2PeriphClockCmd(LCD_DATA_GPIO_CLK, ENABLE);

GPIO_InitStruct.GPIO_Pin = LCD_RS_GPIO_PIN | LCD_RW_GPIO_PIN | LCD_EN_GPIO_PIN | LCD_D4 | LCD_D5 | LCD_D6 | LCD_D7 ;
GPIO_InitStruct.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStruct.GPIO_Mode = GPIO_Mode_AF;
GPIO_Init(LCD_DATA_GPIO_PORT, &GPIO_InitStruct);

GPIO_ResetBits(LCD_DATA_GPIO_PORT,LCD_RS_GPIO_PIN) ;
GPIO_ResetBits(LCD_DATA_GPIO_PORT,LCD_EN_GPIO_PIN) ;
GPIO_ResetBits(LCD_DATA_GPIO_PORT,LCD_RW_GPIO_PIN) ;

LCD_Delay_US(15000);
LCD_DATA(0x03);
LCD_STROBE();
LCD_Delay_US(5000);
LCD_STROBE();
LCD_Delay_US(200);
LCD_STROBE();
LCD_Delay_US(200);
LCD_DATA(2);
LCD_STROBE();

lcd_write(0x28); // Set interface length
lcd_write(0x0C); // Display On, Cursor On, Cursor Blink
lcd_clear(); // Clear screen
lcd_write(0x6);
}
    Code "main.c"
    Code:
    #include "stm32f4xx.h"
#include "main.h"
int main (void)
{
	lcd_init();
        lcd_clear();
	while(1)
	{
		lcd_gotoxy(0,2);
		lcd_putsf(" DIEN TU ");
	}
}
#ifdef  USE_FULL_ASSERT

/**
  * @brief  Reports the name of the source file and the source line number
  *         where the assert_param error has occurred.
  * @param  file: pointer to the source file name
  * @param  line: assert_param error line source number
  * @retval None
  */
void assert_failed(uint8_t* file, uint32_t line)
{
  /* User can add his own implementation to report the file name and line number,
     ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */

  while (1)
  {}
}
#endif
    Nhưng mà mình sử dụng code do ST cung cấp thì sử dụng được
    Code:
    #include "stm32f4xx.h"

#define     LCM_OUT               GPIOB->ODR

// connect RW leg to GND, and power supply rails to +5V and gnd
// Define symbolic LCM - MCU pin mappings
// We've set DATA PIN TO 4,5,6,7 for easy translation
//
#define     LCM_PIN_RS            GPIO_Pin_0          // P1.0
#define     LCM_PIN_EN            GPIO_Pin_2          // P1.2
#define     LCM_PIN_D7            GPIO_Pin_7          // P1.7
#define     LCM_PIN_D6            GPIO_Pin_6          // P1.6
#define     LCM_PIN_D5            GPIO_Pin_5          // P1.5
#define     LCM_PIN_D4            GPIO_Pin_4          // P1.4

GPIO_InitTypeDef  GPIO_InitStructure;
#define     LCM_PIN_MASK  ((LCM_PIN_RS | LCM_PIN_EN | LCM_PIN_D7 | LCM_PIN_D6 | LCM_PIN_D5 | LCM_PIN_D4))

#define     FALSE                 0
#define     TRUE                  1

void __delay_cycles(int a)
{
    int i = 0;
    int f = 0;
    while(f<a)
    {
            while(i<60)
                {i++;}
        f++;
    }
}

void PulseLcm()
{
    LCM_OUT &= ~LCM_PIN_EN;
    __delay_cycles(220);
    LCM_OUT |= LCM_PIN_EN;
    __delay_cycles(220);
    LCM_OUT &= (~LCM_PIN_EN);
    __delay_cycles(220);
}

void SendByte(char ByteToSend, int IsData)
{
    LCM_OUT &= (~LCM_PIN_MASK);
    LCM_OUT |= (ByteToSend & 0xF0);

    if (IsData == TRUE)
    {
        LCM_OUT |= LCM_PIN_RS;
    }
    else
    {
        LCM_OUT &= ~LCM_PIN_RS;
    }
    PulseLcm();
    LCM_OUT &= (~LCM_PIN_MASK);
    LCM_OUT |= ((ByteToSend & 0x0F) << 4);

    if (IsData == TRUE)
    {
        LCM_OUT |= LCM_PIN_RS;
    }
    else
    {
        LCM_OUT &= ~LCM_PIN_RS;
    }

    PulseLcm();
}

void Cursor(char Row, char Col)
{
    char address;
    if (Row == 0)
    {
        address = 0;
    }
    else
    {
        address = 0x40;
    }

    address |= Col;
    SendByte(0x80 | address, FALSE);
}


void ClearLcmScreen()
{
    SendByte(0x01, FALSE);
    SendByte(0x02, FALSE);
}

void InitializeLcm(void)
{
    RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOB, ENABLE);
    GPIO_InitStructure.GPIO_Pin =GPIO_Pin_0 | GPIO_Pin_1| GPIO_Pin_4 | GPIO_Pin_5| GPIO_Pin_6| GPIO_Pin_7;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_OUT;
    GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_100MHz;
    GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;
    GPIO_Init(GPIOB, &GPIO_InitStructure);

    LCM_OUT &= ~(LCM_PIN_MASK);

    __delay_cycles(32000);
    __delay_cycles(32000);
    __delay_cycles(32000);

    LCM_OUT &= ~LCM_PIN_RS;
    LCM_OUT &= ~LCM_PIN_EN;
    LCM_OUT = 0x20;
    PulseLcm();
    SendByte(0x28, FALSE);
    SendByte(0x0E, FALSE);
    SendByte(0x06, FALSE);
}


void PrintStr(char *Text)
{
    char *c;

    c = Text;

    while ((c != 0) && (*c != 0))
    {
        SendByte(*c, TRUE);
        c++;
    }
}
//***************************************************************
    main
    Code:
    #include "stm32f4xx.h"
#include "lcd.h"

int main(void)
{
   int a = 0;
            while(a<100)
            {
                __delay_cycles(32000);
                a++;
            }

    InitializeLcm();
    __delay_cycles(32000);
    ClearLcmScreen();
    __delay_cycles(32000);
    Cursor(0,0);
    PrintStr("DIEN TU");
    Cursor(1,0);
    __delay_cycles(32000);
    PrintStr("VIET NAM");

      while(1);
}
//******************************************************
#ifdef  USE_FULL_ASSERT
/**
  * @brief  Reports the name of the source file and the source line number
  *   where the assert_param error has occurred.
  * @param  file: pointer to the source file name
  * @param  line: assert_param error line source number
  * @retval None
  */
void assert_failed(uint8_t* file, uint32_t line)
{ 
  /* User can add his own implementation to report the file name and line number,
     ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */

	/* Infinite loop */
	while (1)
	{
	}
}
#endif

/**
  * @}
  */

/**
  * @}
  */

/******************* (C) COPYRIGHT 2009 ARMVietNam *****END OF FILE****/
    Mong mọi người giúp đỡ.
    Tags: None
  • #2
    Tìm ra chỗ rồi. Cảm ơn mấy bạn đã xem.


    void lcd_init(void)
    {
    GPIO_InitTypeDef GPIO_InitStruct;

    RCC_APB2PeriphClockCmd(LCD_DATA_GPIO_CLK, ENABLE);

    GPIO_InitStruct.GPIO_Pin = LCD_RS_GPIO_PIN | LCD_RW_GPIO_PIN | LCD_EN_GPIO_PIN | LCD_D4 | LCD_D5 | LCD_D6 | LCD_D7 ;
    GPIO_InitStruct.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_InitStruct.GPIO_Mode = GPIO_Mode_AF;
    GPIO_Init(LCD_DATA_GPIO_PORT, &GPIO_InitStruct);

    GPIO_ResetBits(LCD_DATA_GPIO_PORT,LCD_RS_GPIO_PIN) ;
    GPIO_ResetBits(LCD_DATA_GPIO_PORT,LCD_EN_GPIO_PIN) ;
    GPIO_ResetBits(LCD_DATA_GPIO_PORT,LCD_RW_GPIO_PIN) ;

    LCD_Delay_US(15000);
    LCD_DATA(0x03);
    LCD_STROBE();
    LCD_Delay_US(5000);
    LCD_STROBE();
    LCD_Delay_US(200);
    LCD_STROBE();
    LCD_Delay_US(200);
    LCD_DATA(2);
    LCD_STROBE();

    lcd_write(0x28); // Set interface length
    lcd_write(0x0C); // Display On, Cursor On, Cursor Blink
    lcd_clear(); // Clear screen
    lcd_write(0x6);
    }


    Thay bằng

    void lcd_init(void)
    {
    GPIO_InitTypeDef GPIO_InitStruct;

    RCC_AHB1PeriphClockCmd(LCD_DATA_GPIO_CLK, ENABLE);

    GPIO_InitStruct.GPIO_Pin = LCD_RS_GPIO_PIN | LCD_RW_GPIO_PIN | LCD_EN_GPIO_PIN | LCD_D4 | LCD_D5 | LCD_D6 | LCD_D7 ;
    GPIO_InitStruct.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_InitStruct.GPIO_Mode = GPIO_Mode_OUT;
    GPIO_InitStruct.GPIO_OType = GPIO_OType_PP;
    GPIO_InitStruct.GPIO_PuPd = GPIO_PuPd_UP;
    GPIO_Init(LCD_DATA_GPIO_PORT, &GPIO_InitStruct);

    GPIO_ResetBits(LCD_DATA_GPIO_PORT,LCD_RS_GPIO_PIN) ;
    GPIO_ResetBits(LCD_DATA_GPIO_PORT,LCD_EN_GPIO_PIN) ;
    GPIO_ResetBits(LCD_DATA_GPIO_PORT,LCD_RW_GPIO_PIN) ;

    LCD_Delay_US(15000);
    LCD_DATA(0x03);
    LCD_STROBE();
    LCD_Delay_US(5000);
    LCD_STROBE();
    LCD_Delay_US(200);
    LCD_STROBE();
    LCD_Delay_US(200);
    LCD_DATA(2);
    LCD_STROBE();

    lcd_write(0x28); // Set interface length
    lcd_write(0x0C); // Display On, Cursor On, Cursor Blink
    lcd_clear(); // Clear screen
    lcd_write(0x6);
    }

    Comment

    • #3
      Sao minh test thu no ko chay ta?? Co chay ko ban?

      Comment

      • #4
        Ban co the cho minh xin project ve LCD 16x2 ma ST cung cap ve STM32F4xx nay duoc ko? Tks ban nhieu...

        Comment

        • #5
          Các bạn cho mình hỏi STM32Fx này thì bạn dùng toolchain nào để lập trình, free, bản quyền hay cracked thế ? Mình lâu không nghịch mấy con microcontrollers, google sơ thì thấy Keil, Atollic ... nhưng đều là phải mua thì phải ?
          Sorry vì câu hỏi hơi bị ngu ngơ

          Comment

          • #6
            Đây là bài project do mình viết nó chạy được mà.
            LCD_1.rar

            Comment

            • #7
              Cái này thì bạn dùng Keil Arm. Có cách bẻ khoá hết mà bạn.

              Comment

              • #8
                hi hi ... Dùng Keil khoai thế ... Mình nghe anh QD dùng sang MikroC ... ngon hơn, đơn giản thật
                Code:
                // LCD module connections
sbit LCD_RS at GPIO_PORTA_DATA.B2;
sbit LCD_EN at GPIO_PORTA_DATA.B3;
sbit LCD_D4 at GPIO_PORTA_DATA.B4;
sbit LCD_D5 at GPIO_PORTA_DATA.B5;
sbit LCD_D6 at GPIO_PORTA_DATA.B6;
sbit LCD_D7 at GPIO_PORTA_DATA.B7;


sbit LCD_RS_Direction at GPIO_PORTA_DIR.B2;
sbit LCD_EN_Direction at GPIO_PORTA_DIR.B3;
sbit LCD_D4_Direction at GPIO_PORTA_DIR.B4;
sbit LCD_D5_Direction at GPIO_PORTA_DIR.B5;
sbit LCD_D6_Direction at GPIO_PORTA_DIR.B6;
sbit LCD_D7_Direction at GPIO_PORTA_DIR.B7;
// End LCD module connections

char txt1[] = "mikroElektronika";    
char txt2[] = "Stellaris";
char txt3[] = "Lcd4bit";
char txt4[] = "example";

char i;                              // Loop variable

void Move_Delay() {                  // Function used for text moving
  Delay_ms(750);                     // You can change the moving speed here
}

void main(){
  Lcd_Init();                        // Initialize LCD

  Lcd_Cmd(_LCD_CLEAR);               // Clear display
  Lcd_Cmd(_LCD_CURSOR_OFF);          // Cursor off
  Lcd_Out(1,6,txt3);                 // Write text in first row

  Lcd_Out(2,6,txt4);                 // Write text in second row
  Delay_ms(2000);
  Lcd_Cmd(_LCD_CLEAR);               // Clear display

  Lcd_Out(1,1,txt1);                 // Write text in first row
  Lcd_Out(2,4,txt2);                 // Write text in second row

  Delay_ms(2000);

  // Moving text
  for(i=0; i<4; i++) {               // Move text to the right 4 times
    Lcd_Cmd(_LCD_SHIFT_RIGHT);
    Move_Delay();
  }

  while(1) {                         // Endless loop
    for(i=0; i<7; i++) {             // Move text to the left 7 times
      Lcd_Cmd(_LCD_SHIFT_LEFT);
      Move_Delay();
    }

    for(i=0; i<7; i++) {             // Move text to the right 7 times
      Lcd_Cmd(_LCD_SHIFT_RIGHT);
      Move_Delay();
    }
  }
}
                (Phi)
                Module RF chuyên dụng điều khiển, truyền dữ liệu, thiết kế đề tài, dự án điện tử - chuyển giao công nghệ... ĐT: 0904964977 - email: dientuqueduong@yahoo.com

                Comment

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