/**
* \brief Put a byte to the display controller RAM
*
* If the LCD controller is accessed by the SPI interface we will also put the
* data to the local framebuffer.
*
* \param[in] page Page address
* \param[in] column Page offset (x coordinate)
* \param[in] data Data to be written
*
* This example will put the value 0xFF to the first byte in the display memory
* setting a 8 pixel high column of pixels in the upper left corner of the
* display.
* \code
gfx_mono_st7565r_put_byte(0, 0, 0xFF);
\endcode
*/
void gfx_mono_st7565r_put_byte(gfx_coord_t page, gfx_coord_t column,
uint8_t data)
{
#ifdef CONFIG_ST7565R_FRAMEBUFFER
gfx_mono_framebuffer_put_byte(page, column, data);
#endif
st7565r_set_page_address(page);
st7565r_set_column_address(column);
st7565r_write_data(data);
}
/**
* \brief Put a byte to the display controller RAM
*
* If the LCD controller is accessed by the SPI interface we will also put the
* data to the local framebuffer.
*
* \param page Page address
* \param column Page offset (x coordinate)
* \param data Data to be written
*
* This example will put the value 0xFF to the first byte in the display memory
* setting a 8 pixel high column of pixels in the upper left corner of the
* display.
* \code
* gfx_mono_ssd1306_put_byte(0, 0, 0xFF, false);
* \endcode
*/
void gfx_mono_ssd1306_put_byte(gfx_coord_t page, gfx_coord_t column,
uint8_t data, bool force)
{
#ifdef CONFIG_SSD1306_FRAMEBUFFER
if (!force && data == gfx_mono_framebuffer_get_byte(page, column)) {
return;
}
gfx_mono_framebuffer_put_byte(page, column, data);
#endif
ssd1306_set_page_address(page);
ssd1306_set_column_address(column);
ssd1306_write_data(data);
}
/**
* \brief Draw pixel to framebuffer
*
* \param x X coordinate of the pixel
* \param y Y coordinate of the pixel
* \param color Pixel operation
*
*/
void gfx_mono_framebuffer_draw_pixel(gfx_coord_t x, gfx_coord_t y,
gfx_mono_color_t color)
{
uint8_t page;
uint8_t pixel_mask;
uint8_t pixel_value;
/* Discard pixels drawn outside the screen */
if ((x > GFX_MONO_LCD_WIDTH - 1) || (y > GFX_MONO_LCD_HEIGHT - 1)) {
return;
}
page = y / GFX_MONO_LCD_PIXELS_PER_BYTE;
pixel_mask = (1 << (y - (page * 8)));
/*
* Read the page containing the pixel in interest, then perform the
* requested action on this pixel before writing the page back to the
* display.
*/
pixel_value = gfx_mono_framebuffer_get_byte(page, x);
switch (color) {
case GFX_PIXEL_SET:
pixel_value |= pixel_mask;
break;
case GFX_PIXEL_CLR:
pixel_value &= ~pixel_mask;
break;
case GFX_PIXEL_XOR:
pixel_value ^= pixel_mask;
break;
default:
break;
}
gfx_mono_framebuffer_put_byte(page, x, pixel_value);
}
