C Library for ST7735 1.8 TFT LCD display

/** 

 * --------------------------------------------------------------------------------------------+ 

 * [url=home.php?mod=space&uid=139335]@name[/url]        Main example st7735 LCD driver

 * --------------------------------------------------------------------------------------------+ 

 *              Copyright (C) 2020 Marian Hrinko.

 *              Written by Marian Hrinko (mato.hrinko@gmail.com)

 *

 * [url=home.php?mod=space&uid=187600]@author[/url]      Marian Hrinko

 * @datum       13.10.2020

 * [url=home.php?mod=space&uid=391783]@update[/url]      21.06.2021

 * [url=home.php?mod=space&uid=288409]@file[/url]        main.c

 * [url=home.php?mod=space&uid=895143]@version[/url]     2.0

 * @tested      AVR Atmega328

 *

 * @depend      st7735.h

 * --------------------------------------------------------------------------------------------+

 * @descr       Version 1.0 -> applicable for 1 display

 *              Version 2.0 -> applicable for more than 1 display

 */

#include "lib/st7735.h"



/**

 * [url=home.php?mod=space&uid=1170026]@desc[/url]    Main function

 *

 * @param   Void

 *

 * [url=home.php?mod=space&uid=266161]@return[/url]  Void

 */

int main (void)

{

  // start

  uint8_t start = 30;

  // end

  uint8_t end = MAX_X - start;



  // LCD 1 - init struct

  // ----------------------------------------------------------

  // Chip Select

  struct signal cs = { .ddr = &DDRB, .port = &PORTB, .pin = 2 };

  // Back Light

  struct signal bl = { .ddr = &DDRB, .port = &PORTB, .pin = 1 };

  // Data / Command

  struct signal dc = { .ddr = &DDRB, .port = &PORTB, .pin = 0 };

  // Reset

  struct signal rs = { .ddr = &DDRD, .port = &PORTD, .pin = 7 };

  // LCD struct

  struct st7735 lcd1 = { .cs = &cs, .bl = &bl, .dc = &dc, .rs = &rs };



  // LCD 2 - init struct

  // ----------------------------------------------------------

  // Chip Select

  struct signal cs2 = { .ddr = &DDRD, .port = &PORTD, .pin = 0 };

  // Back Light

  struct signal bl2 = { .ddr = &DDRD, .port = &PORTD, .pin = 1 };

  // Data / Command

  struct signal dc2 = { .ddr = &DDRB, .port = &PORTB, .pin = 0 };

  // Reset

  struct signal rs2 = { .ddr = &DDRD, .port = &PORTD, .pin = 3 };

  // LCD struct

  struct st7735 lcd2 = { .cs = &cs2, .bl = &bl2, .dc = &dc2, .rs = &rs2 };



  // LCD 1

  // ----------------------------------------------------------

  // init lcd 1

  ST7735_Init (&lcd1);

  // clear screen

  ST7735_ClearScreen (&lcd1, BLACK);

  // set position X, Y

  ST7735_SetPosition (start + 5, 10);  

  // draw string

  ST7735_DrawString (&lcd1, "Loading DATA ...", WHITE, X2);



  // draw Loading

  for (uint8_t i = start; i < end; i++) {

    // draw rectangle

    ST7735_DrawRectangle (&lcd1, start, i, 30, 40, RED);

  }



  // LCD 2

  // ----------------------------------------------------------

  // init lcd 2

  ST7735_Init (&lcd2);

  // clear screen

  ST7735_ClearScreen (&lcd2, BLACK);

  // set position X, Y

  ST7735_SetPosition (17, 10);  

  // draw string

  ST7735_DrawString (&lcd2, "ST7735 LCD 2", WHITE, X3);

  // draw fast horizontal line

  ST7735_DrawLineHorizontal (&lcd2, 5, MAX_X - 5, 27, WHITE);



  // EXIT

  // ------------------------------------------------- 

  // return & exit

  return 0;

}