LCD_Driver.c

#include "stm32f10x.h"
#include "system_stm32f10x.h"
#include "GPIO_Driver.h"
#include "delay.h"
#include "LCD_Driver.h"

GPIO_TYPE static D4;
GPIO_TYPE static D5;
GPIO_TYPE static D6;
GPIO_TYPE static D7;
GPIO_TYPE static EN;
GPIO_TYPE static RW;
GPIO_TYPE static RS;

void lcd_init(GPIO_TypeDef *D4port, uint8_t D4pin, GPIO_TypeDef *D5port, uint8_t D5pin,
                            GPIO_TypeDef *D6port, uint8_t D6pin, GPIO_TypeDef *D7port, uint8_t D7pin,
                            GPIO_TypeDef *ENport, uint8_t ENpin, GPIO_TypeDef *RWport, uint8_t RWpin,
                            GPIO_TypeDef *RSport, uint8_t RSpin)
{
    //==========================================
    D4.port = D4port;
    D4.pin = D4pin;
    D4.mode = OUTPUT;
  D4.mode_type = OUTPUT_GEN_PURPOSE;
    D4.speed = SPEED_2MHZ;
    //==========================================

    //==========================================
    D5.port = D5port;
    D5.pin = D5pin;
    D5.mode = OUTPUT;
  D5.mode_type = OUTPUT_GEN_PURPOSE;
    D5.speed = SPEED_2MHZ;
    //==========================================

    //==========================================
    D6.port = D6port;
    D6.pin = D6pin;
    D6.mode = OUTPUT;
  D6.mode_type = OUTPUT_GEN_PURPOSE;
    D6.speed = SPEED_2MHZ;
    //==========================================

    //==========================================
    D7.port = D7port;
    D7.pin = D7pin;
    D7.mode = OUTPUT;
  D7.mode_type = OUTPUT_GEN_PURPOSE;
    D7.speed = SPEED_2MHZ;
    //==========================================

    //==========================================
    EN.port = ENport;
    EN.pin = ENpin;
    EN.mode = OUTPUT;
  EN.mode_type = OUTPUT_GEN_PURPOSE;
    EN.speed = SPEED_2MHZ;
    //==========================================

    //==========================================
    RW.port = RWport;
    RW.pin = RWpin;
    RW.mode = OUTPUT;
  RW.mode_type = OUTPUT_GEN_PURPOSE;
    RW.speed = SPEED_2MHZ;
    //==========================================

    //==========================================
    RS.port = RSport;
    RS.pin = RSpin;
    RS.mode = OUTPUT;
  RS.mode_type = OUTPUT_GEN_PURPOSE;
    RS.speed = SPEED_2MHZ;
    //==========================================

    init_gpio(D4);
    init_gpio(D5);
    init_gpio(D6);
    init_gpio(D7);
    init_gpio(EN);
    init_gpio(RW);
    init_gpio(RS);

    //==============init LCD=================
    delayMs(50);
    pin_write(RS.port, RS.pin, LOW);
    pin_write(RW.port, RW.pin, LOW);
    pin_write(D4.port, D4.pin, HIGH);
    pin_write(D5.port, D5.pin, HIGH);
    pin_write(D6.port, D6.pin, LOW);
    pin_write(D7.port, D7.pin, LOW);

    lcd_clock();

    delayMs(10);
    pin_write(RS.port, RS.pin, LOW);
    pin_write(RW.port, RW.pin, LOW);
    pin_write(D4.port, D4.pin, HIGH);
    pin_write(D5.port, D5.pin, HIGH);
    pin_write(D6.port, D6.pin, LOW);
    pin_write(D7.port, D7.pin, LOW);

    lcd_clock();

    delayMs(1);
    pin_write(RS.port, RS.pin, LOW);
    pin_write(RW.port, RW.pin, LOW);
    pin_write(D4.port, D4.pin, HIGH);
    pin_write(D5.port, D5.pin, HIGH);
    pin_write(D6.port, D6.pin, LOW);
    pin_write(D7.port, D7.pin, LOW);

    lcd_clock();

    //==============init 4 bit mode=================
    pin_write(RS.port, RS.pin, LOW);
    pin_write(RW.port, RW.pin, LOW);
    pin_write(D4.port, D4.pin, LOW);
    pin_write(D5.port, D5.pin, HIGH);
    pin_write(D6.port, D6.pin, LOW);
    pin_write(D7.port, D7.pin, LOW);

    lcd_clock();

    //==============init 2 line 5X8=================
    lcd_command(FOUR_BIT_MODE);

    //==============display off=================
    lcd_command(DISPLAY_OFF);

    //==============clear display=================
    lcd_command(DISPLAY_CLEAR);

    //===============entry mode set==========================
    lcd_command(EM_INCREMENT);

    //===================display on==============================
    lcd_command(DISPLAY_ON_COFF);
}

void lcd_clock()
{
    pin_write(EN.port, EN.pin, HIGH);
    delayMs(1);
    pin_write(EN.port, EN.pin, LOW);
    delayMs(1);
}

void lcd_command(uint8_t command)
{
    //high bits
    pin_write(RS.port, RS.pin, LOW);
    pin_write(RW.port, RW.pin, LOW);

    pin_write(D4.port, D4.pin, (command>>4)&0x01);
    pin_write(D5.port, D5.pin, (command>>5)&0x01);
    pin_write(D6.port, D6.pin, (command>>6)&0x01);
    pin_write(D7.port, D7.pin, (command>>7)&0x01);

    lcd_clock();
    //low bits
    pin_write(RS.port, RS.pin, LOW);
    pin_write(RW.port, RW.pin, LOW);

    pin_write(D4.port, D4.pin, (command)&0x01);
    pin_write(D5.port, D5.pin, (command>>1)&0x01);
    pin_write(D6.port, D6.pin, (command>>2)&0x01);
    pin_write(D7.port, D7.pin, (command>>3)&0x01);

    lcd_clock();
}

void lcd_write_char(uint8_t character)
{
    pin_write(RS.port, RS.pin, HIGH);
    pin_write(RW.port, RW.pin, LOW);

    pin_write(D4.port, D4.pin, (character>>4)&0x01);
    pin_write(D5.port, D5.pin, (character>>5)&0x01);
    pin_write(D6.port, D6.pin, (character>>6)&0x01);
    pin_write(D7.port, D7.pin, (character>>7)&0x01);

    lcd_clock();
    //low bits
    pin_write(RS.port, RS.pin, HIGH);
    pin_write(RW.port, RW.pin, LOW);

    pin_write(D4.port, D4.pin, (character)&0x01);
    pin_write(D5.port, D5.pin, (character>>1)&0x01);
    pin_write(D6.port, D6.pin, (character>>2)&0x01);
    pin_write(D7.port, D7.pin, (character>>3)&0x01);
    lcd_clock();
}

void lcd_write_number(uint16_t number)
{
    uint8_t numberArray[4] = {0, 0, 0, 0};
    uint8_t numOfDigits = 0;

    if(number < 10)
    {
            numOfDigits = 1;
            numberArray[0] = (uint8_t)number;
    }
    else if(number < 100)
    {
        numOfDigits = 2;
        numberArray[1] = (uint8_t)(number % 10);
        numberArray[0] = (uint8_t)(number/10);
    }
    else if( number < 1000)
    {
        numOfDigits = 3;
        numberArray[2] = (uint8_t)(number % 10);
        numberArray[1] = (uint8_t)((number/10)%10);
        numberArray[0] = (uint8_t)(number/100);
    }
    else if( number < 10000)
    {
        numOfDigits = 4;
        numberArray[3] = (uint8_t)(number % 10);
        numberArray[2] = (uint8_t)((number/10)%10);
        numberArray[1] = (uint8_t)((number/100)%10);
        numberArray[0] = (uint8_t)(number/1000);
    }



    for(int i = 0; i < numOfDigits; i++)
    {
        numberArray[i] = numberArray[i] | 0x30;

        pin_write(RS.port, RS.pin, HIGH);
        pin_write(RW.port, RW.pin, LOW);

        pin_write(D4.port, D4.pin, (numberArray[i]>>4)&0x01);
        pin_write(D5.port, D5.pin, (numberArray[i]>>5)&0x01);
        pin_write(D6.port, D6.pin, (numberArray[i]>>6)&0x01);
        pin_write(D7.port, D7.pin, (numberArray[i]>>7)&0x01);

        lcd_clock();
        //low bits
        pin_write(RS.port, RS.pin, HIGH);
        pin_write(RW.port, RW.pin, LOW);

        pin_write(D4.port, D4.pin, (numberArray[i])&0x01);
        pin_write(D5.port, D5.pin, (numberArray[i]>>1)&0x01);
        pin_write(D6.port, D6.pin, (numberArray[i]>>2)&0x01);
        pin_write(D7.port, D7.pin, (numberArray[i]>>3)&0x01);
        lcd_clock();
    }

}

void lcd_clear(uint8_t row, uint8_t start_collumn, uint8_t end_collumn)
{
    lcd_set_cursor(row, start_collumn);

    for(int i = 0; i < (end_collumn-start_collumn)+1; i++)
    {
        lcd_write_char(' ');
    }

}

void lcd_set_cursor(uint8_t yPos, uint8_t xPos)
{
    if(yPos == 1)
    {
        xPos += 0x40;
    }

    lcd_command(0x80 | xPos);

}

void lcd_create_character(uint8_t address, uint8_t character[])
{
    address = 8*address; //the CG address is 6 bits, the first 3 bits represent the specific
                                             //address of the custom character, and the last 3  bits represent
                                             //the address of the graphical bit values

    lcd_command(0x40 | address); //the 0x40 is the write to CGRAM command, followed by the address

    for(int i = 0; i < 8; i++)
    {
        lcd_write_char(character[i]);
    }
}