ssd1331_drawPixel.c

/*
 * @file ssd1331_drawPixel.c
 *
 * @author Matthew Matz
 *
 * @version 0.9
 *
 * @copyright Copyright (C) Parallax, Inc. 2019.  See end of file for
 * terms of use (MIT License).
 *
 * @brief 0.96-inch RGB OLED display bitmap driver, see ssd1331_h. for documentation.
 *
 * @detail Please submit bug reports, suggestions, and improvements to
 * this code to editor@parallax.com.
 */


#include "ssd1331.h"


void ssd1331_drawPixel(screen_t* dev, int x, int y, int color) {
  int mask_cs =  (1 << dev->dev_id);
  int mask_sdi = (1 << dev->sdi_pin);
  int mask_clk = (1 << dev->clk_pin);
  int mask_dc =  (1 << dev->dc_pin);

  ssd1331_writeLockSet(dev->dev_id);
  
  ssd1331_writeByte(mask_cs, mask_sdi, mask_clk, mask_dc, SSD1331_CMD_SETCOLUMN, 0);
  ssd1331_writeByte(mask_cs, mask_sdi, mask_clk, mask_dc, x, 0);
  ssd1331_writeByte(mask_cs, mask_sdi, mask_clk, mask_dc, x, 0);
  
  ssd1331_writeByte(mask_cs, mask_sdi, mask_clk, mask_dc, SSD1331_CMD_SETROW, 0);
  ssd1331_writeByte(mask_cs, mask_sdi, mask_clk, mask_dc, y, 0);
  ssd1331_writeByte(mask_cs, mask_sdi, mask_clk, mask_dc, y, 0);

  ssd1331_writeByte(mask_cs, mask_sdi, mask_clk, mask_dc, (color >> 8), 1);
  ssd1331_writeByte(mask_cs, mask_sdi, mask_clk, mask_dc, color & 0xff, 1);

  ssd1331_writeLockClear(dev->dev_id);
}