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ARM: STM32VL-Discovery and LCD

Hello,

I'm trying to run WC1602A LCD display but nothing happens, can anyone pinpoint me where i have a mistake in code (the code is compiling) because i was analising it whole night and couldn't find one

main.c
int main(void)
{
  LCD_Init();
  LCD_Clear();
  LCD_GoTo(0,0);
  LCD_SendText("Hello\0");
 }

lcd4bit.c --> I'm thinking that problem lie somewhere here in LCD_Init() function

#include "lcd4bit.h"
//====================================
void delay_ms(int ms)
{
        int i, tms;
        tms = 9000*ms;
        for(i=0;i<tms;i++);
}
//======================================
void delay_us(int us)
{
        int i, tus;
        tus = 9*us;
        for(i=0;i<tus;i++);
}
//=======================================================
uint8_t LCD_ReadByte(void)
{
        GPIO_InitTypeDef GPIO_Conf;
        uint8_t ReadedData=0;
        GPIO_SetBits(GPIOC, LCD_D_ALL);
        // Zmiana konfiguracji wyprowadzen na wejsciach
        GPIO_Conf.GPIO_Pin = GPIO_Pin_0 | GPIO_Pin_1 | GPIO_Pin_2 | GPIO_Pin_3;
        GPIO_Conf.GPIO_Mode = GPIO_Mode_IN_FLOATING;
        GPIO_Conf.GPIO_Speed = GPIO_Speed_50MHz;
        GPIO_Init(GPIOC, &GPIO_Conf);

        GPIO_SetBits(GPIOC, LCD_RW);
        GPIO_SetBits(GPIOC, LCD_EN);

        if(GPIO_ReadInputDataBit(GPIOC, LCD_D7))        //odczyt starszej polowy
                ReadedData |= 0x80;
        if(GPIO_ReadInputDataBit(GPIOC, LCD_D6))
                ReadedData |= 0x40;
        if(GPIO_ReadInputDataBit(GPIOC, LCD_D5))
                ReadedData |= 0x20;
        if(GPIO_ReadInputDataBit(GPIOC, LCD_D4))
                ReadedData |= 0x10;

        GPIO_ResetBits(GPIOC, LCD_EN);
        delay_us(30);
        GPIO_SetBits(GPIOC, LCD_EN);

        if(GPIO_ReadInputDataBit(GPIOC, LCD_D7))        //odczyt mlodszej polowy
                ReadedData |= 0x08;
        if(GPIO_ReadInputDataBit(GPIOC, LCD_D6))
                ReadedData |= 0x04;
        if(GPIO_ReadInputDataBit(GPIOC, LCD_D5))
                ReadedData |= 0x02;
        if(GPIO_ReadInputDataBit(GPIOC, LCD_D4))
                ReadedData |= 0x01;
        GPIO_ResetBits(GPIOC, LCD_EN);
        // Powrot do pierwotnych ustawien wyprowadzen
        GPIO_Conf.GPIO_Pin = GPIO_Pin_0 | GPIO_Pin_1 | GPIO_Pin_2 | GPIO_Pin_3;
        GPIO_Conf.GPIO_Mode = GPIO_Mode_Out_PP;
        GPIO_Conf.GPIO_Speed = GPIO_Speed_50MHz;
        GPIO_Init(GPIOC, &GPIO_Conf);

        return ReadedData;
}
//=============================================================================

void LCD_SendByte(uint8_t cmd)
{
        uint8_t tcmd = 0;

        GPIO_ResetBits(GPIOC, LCD_RW);
        GPIO_ResetBits(GPIOC, LCD_D_ALL);
        GPIO_SetBits(GPIOC, LCD_EN);

        tcmd = cmd >> 4;                                  // 4x w prawo
        if( tcmd & 0x01 )
                GPIO_SetBits(GPIOC, LCD_D4);    //zapis starszej polowy
        if( tcmd & 0x02 )
                GPIO_SetBits(GPIOC, LCD_D5);
        if( tcmd & 0x04 )
                GPIO_SetBits(GPIOC, LCD_D6);
        if( tcmd & 0x08 )
                GPIO_SetBits(GPIOC, LCD_D7);

        GPIO_ResetBits(GPIOC, LCD_EN);
        delay_us(30);
        GPIO_SetBits(GPIOC, LCD_EN);
        GPIO_ResetBits(GPIOC, LCD_D_ALL);

        cmd &= 0x0F;                                // maskowanie czterech mlodszych bitow
        if( cmd & 0x01 )
                GPIO_SetBits(GPIOC, LCD_D4);    //zapis mlodszej polowy
        if( cmd & 0x02 )
                GPIO_SetBits(GPIOC, LCD_D5);
        if( cmd & 0x04 )
                GPIO_SetBits(GPIOC, LCD_D6);
        if( cmd & 0x08 )
                GPIO_SetBits(GPIOC, LCD_D7);

        GPIO_ResetBits(GPIOC, LCD_EN);
        GPIO_ResetBits(GPIOC, LCD_D_ALL);
        GPIO_ResetBits(GPIOC, LCD_RS);
        while(LCD_ReadByte() & 0x80);               // czekaj na zakonczenie operacji
}
//============================================================================
void LCD_SendCmd(uint8_t cmd)
{
        GPIO_ResetBits(GPIOC, LCD_RS);
        LCD_SendByte(cmd);
}
//=============================================================================
void LCD_SendData(uint8_t data)
{
        GPIO_SetBits(GPIOC, LCD_RS);
        LCD_SendByte(data);
}
//===============================================================================
void LCD_SendText(uint8_t * text)
{
        while(*text)
        {
                LCD_SendData(*text);
                text++;
        }
}
//=======================================================================================
void LCD_Clear(void)
{
        LCD_SendCmd(0x01);
}
//=====================================================================================
void LCD_GoTo(uint8_t wers, uint8_t kol)
{
        uint8_t pos = 0;
        pos = (wers * 0x40) + kol;
        pos += 0x80;
        LCD_SendCmd(pos);
}
//===========================================================================
void LCD_Init(void)
{
        uint8_t i;
        GPIO_InitTypeDef GPIO_Conf;

        RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOC, ENABLE);

        GPIO_Conf.GPIO_Pin = GPIO_Pin_0 | GPIO_Pin_1 | GPIO_Pin_2 | GPIO_Pin_3 | GPIO_Pin_10 | GPIO_Pin_11 | GPIO_Pin_12;
        GPIO_Conf.GPIO_Mode = GPIO_Mode_Out_PP;
        GPIO_Conf.GPIO_Speed = GPIO_Speed_50MHz;
        GPIO_Init(GPIOC, &GPIO_Conf);

        delay_ms(30); //me
        GPIO_ResetBits(GPIOC, LCD_RS);
        GPIO_ResetBits(GPIOC, LCD_EN);
        for(i = 0; i<3; i++)
        {
                GPIO_SetBits(GPIOC, LCD_EN);
                GPIO_SetBits(GPIOC, LCD_D4 | LCD_D5);
                GPIO_ResetBits(GPIOC, LCD_D6 | LCD_D7);
                GPIO_ResetBits(GPIOC, LCD_EN);
                delay_ms(5);
        }
        GPIO_SetBits(GPIOC, LCD_EN);
        GPIO_SetBits(GPIOC, LCD_D5);
        GPIO_ResetBits(GPIOC,LCD_D4 | LCD_D6 | LCD_D7);
        GPIO_ResetBits(GPIOC, LCD_EN);
        LCD_SendCmd(0x28);
        LCD_SendCmd(0x08);
        LCD_SendCmd(0x01);
        LCD_SendCmd(0x06);
        LCD_SendCmd(0x0C);
        delay_ms(5); //me
}