static void st7735_pixel_draw(uint16_t x, uint16_t y, uint32_t color)
{
set_addr_window(x, y, x, y);
color = RGB2BGR(color);
const uint8_t data[2] = {color >> 8, color};
nrf_gpio_pin_set(ST7735_DC_PIN);
spi_write(data, sizeof(data));
nrf_gpio_pin_clear(ST7735_DC_PIN);
}
static void st7735_rect_draw(uint16_t x, uint16_t y, uint16_t width, uint16_t height, uint32_t color)
{
set_addr_window(x, y, x + width - 1, y + height - 1);
color = RGB2BGR(color);
const uint8_t data[2] = {color >> 8, color};
nrf_gpio_pin_set(ST7735_DC_PIN);
// Duff's device algorithm for optimizing loop.
uint32_t i = (height * width + 7) / 8;
/*lint -save -e525 -e616 -e646 */
switch ((height * width) % 8) {
case 0:
do {
spi_write(data, sizeof(data));
case 7:
spi_write(data, sizeof(data));
case 6:
spi_write(data, sizeof(data));
case 5:
spi_write(data, sizeof(data));
case 4:
spi_write(data, sizeof(data));
case 3:
spi_write(data, sizeof(data));
case 2:
spi_write(data, sizeof(data));
case 1:
spi_write(data, sizeof(data));
} while (--i > 0);
default:
break;
}
/*lint -restore */
nrf_gpio_pin_clear(ST7735_DC_PIN);
}
void RGB2BGR( DWORD* color )
{
TBpp32 tmp = Bpp32( *color );
RGB2BGR( tmp );
*color = tmp.Value;
}
