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Initialization for 128x128 0.85" LCD with GC9107
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| # Example init and basic routines for 0.85" 128x128 pixel LCD | |
| # Sold under Wisevision N085-1212TBWIG41-H12 | |
| # | |
| # Unnecessary init commands have been stripped out versus other | |
| # routines I found online | |
| def write_cmd(cmd): | |
| set_dc_pin_low() | |
| spi_transmit(cmd) | |
| def write_cmd_data(cmd, data): | |
| write_cmd(cmd) | |
| set_dc_pin_high() | |
| spi_transmit(data) | |
| def init_lcd(): | |
| # reset required on power up | |
| set_reset_low() | |
| sleep(120) | |
| set_reset_high() | |
| set_cs_low() | |
| # Pixel format set | |
| # 0x1 = 12 bits / pixel | |
| # 0x5 = 16 bits / pixel | |
| # 0x6 = 18 bits / pixel | |
| write_cmd_data(0x3A, 0x05) | |
| # Display inversion on | |
| write_cmd(0x21) | |
| # Sleep out | |
| write_cmd(0x11) | |
| set_cs_high() | |
| # Wait 120 ms | |
| sleep(120) | |
| set_cs_low() | |
| # Display on | |
| write_cmd(0x29) | |
| set_cs_high() | |
| # Wait 20 ms | |
| sleep(20) | |
| COL_OFFSET = 2 | |
| ROW_OFFSET = 1 | |
| def write_data(data_bytes): | |
| set_dc_pin_high() | |
| for b in data_bytes: | |
| spi_transmit(b) | |
| def hi_byte(d): | |
| return (d & 0xFF00) >> 8 | |
| def lo_byte(d): | |
| return (d & 0xFF) | |
| def set_window(x, y, width, height): | |
| col = x + COL_OFFSET | |
| col_data = [ | |
| hi_byte(col), low_byte(col), | |
| hi_byte(col + width - 1), low_byte(col + width - 1) | |
| ] | |
| row = y + ROW_OFFSET | |
| row_data = [ | |
| hi_byte(row), low_byte(row), | |
| hi_byte(row + height - 1), low_byte(row + height - 1) | |
| ] | |
| set_cs_pin_low() | |
| write_cmd(0x2A) | |
| write_data(col_data) | |
| write_cmd(0x2B) | |
| write_data(row_data) | |
| set_cs_pin_high() | |
| def write_window(x, y, width, height, pixel_data): | |
| set_window(x, y, width, height) | |
| set_cs_pin_low() | |
| write_cmd(0x2C) | |
| write_data(pixel_data) | |
| set_cs_pin_high() | |
| def clear_to_color(color_r5g6b5): | |
| hi = hi_byte(color_r5g6b5) | |
| lo = lo_byte(color_r5g6b5) | |
| write_window(0, 0, 128, 128, [hi, lo] * 128 * 128) |
Author
Hello! I just followed your py to make a linux fb driver... (well, perplexity did it for me), and I found that I got the channels swapped... I get rbg... I dont know if my panel is bad connected or if it is a known issue or if it can be changed via driver... do you know?
It looks like in my most recent startup sequence I don’t send the “inversion on” command.
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Hello! I just followed your py to make a linux fb driver... (well, perplexity did it for me), and I found that I got the channels swapped... I get rbg... I dont know if my panel is bad connected or if it is a known issue or if it can be changed via driver... do you know?