ssd1331_drawLine.c

/*
 * @file ssd1331_drawLine.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_drawLine(screen_t* dev, int x0, int y0, int x1, int y1, 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_DRAWLINE, 0);
  ssd1331_writeByte(mask_cs, mask_sdi, mask_clk, mask_dc, x0, 0);
  ssd1331_writeByte(mask_cs, mask_sdi, mask_clk, mask_dc, y0, 0);
  ssd1331_writeByte(mask_cs, mask_sdi, mask_clk, mask_dc, x1, 0);
  ssd1331_writeByte(mask_cs, mask_sdi, mask_clk, mask_dc, y1, 0);

  ssd1331_writeByte(mask_cs, mask_sdi, mask_clk, mask_dc, (color >> 11) << 1,  0);
  ssd1331_writeByte(mask_cs, mask_sdi, mask_clk, mask_dc, (color >> 5) & 0x3F, 0);
  ssd1331_writeByte(mask_cs, mask_sdi, mask_clk, mask_dc, (color << 1) & 0x3F, 0);

  //TODO: is this needed?
  int _tMark = CNT + (CLKFREQ / 100000);
  while (_tMark > CNT);                         // Wait for system clock target

  ssd1331_writeLockClear(dev->dev_id);
}

void ssd1331_drawFastVLine(screen_t* dev, int x, int y, int w, int color) {
  ssd1331_drawLine(dev, x, y, x, y + w - 1, color);
}

void ssd1331_drawFastHLine(screen_t* dev, int x, int y, int h, int color) {
  ssd1331_drawLine(dev, x, y, x + h - 1, y, color);
}