| 79 | fill(0x07FF, 120, 240, 160, 320); |
| 80 | |
| 81 | function fill(color, xMin, xMax, yMin, yMax) { |
| 82 | doCmd(0x2a, xMin >> 8, xMin & 0xff, xMax >> 8, xMax & 0xff); |
| 83 | doCmd(0x2b, yMin >> 8, yMin & 0xff, yMax >> 8, yMax & 0xff); |
| 84 | doCmd(0x2c); |
| 85 | |
| 86 | dc.write(1); |
| 87 | |
| 88 | const lines = 4; |
| 89 | const pixels = new Uint16Array((xMax - xMin) * lines); |
| 90 | pixels.fill((color >> 8) | (color << 8)); // big endian |
| 91 | |
| 92 | for (yMax -= yMin; yMax > 0; yMax -= lines) |
| 93 | spi.write(pixels.buffer); |
| 94 | } |
| 95 | |
| 96 | function doCmd(register, ...data) { |
| 97 | spi.flush(true); |