dot clock requests

[ladyada]

add 'reset_bit' to 'dotclockframebuffer.ioexpander_send_init_sequence'
which will toggle the reset pin before init, if not None:
set output, low for 10 ms, set high, then wait 100ms
like this arduino code
https://github.com/moononournation/Arduino_GFX/blob/master/src/databus/Arduino_XCA9554SWSPI.cpp#L27

[ladyada]

trying this code with the latest qualia board:

#8422

import busio
import microcontroller
import board
import time
import displayio
import dotclockframebuffer
from framebufferio import FramebufferDisplay

displayio.release_displays()
TFT_PINS = dict(board.TFT)
print(TFT_PINS)
TFT_TIMINGS = {
    "frequency": 6_500_000, # should be 18_000_000,
    "width": 480,
    "height": 480,
    "hsync_pulse_width": 13,
    "hsync_front_porch": 40,
    "hsync_back_porch": 20,
    "vsync_pulse_width": 15,
    "vsync_front_porch": 40,
    "vsync_back_porch": 20,
    "hsync_idle_low": False,
    "vsync_idle_low": False,
    "de_idle_high": False,
    "pclk_active_high": True,
    "pclk_idle_high": False,
}

init_sequence = bytes((
    0xf0, 5, 0x55, 0xaa, 0x52, 0x08, 0x00,
    0xf6, 2, 0x5a, 0x87,
    0xc1, 1, 0x3f,
    0xc2, 1, 0x0e,
    0xc6, 1, 0xf8,
    0xc9, 1, 0x10,
    0xcd, 1, 0x25,
    0xf8, 1, 0x8a,
    0xac, 1, 0x45,
    0xa0, 1, 0xdd,
    0xa7, 1, 0x47,
    0xfa, 4, 0x00, 0x00, 0x00, 0x04,
    0x86, 4, 0x99, 0xa3, 0xa3, 0x51,
    0xa3, 1, 0xee,
    0xfd, 3, 0x3c, 0x3c, 0x00,
    0x71, 1, 0x48,
    0x72, 1, 0x48,
    0x73, 2, 0x00, 0x44,
    0x97, 1, 0xee,
    0x83, 1, 0x93,
    0x9a, 1, 0x72,
    0x9b, 1, 0x5a,
    0x82, 2, 0x2c, 0x2c,
    0xb1, 1, 0x10,
    0x6d, 32, 0x00, 0x1f, 0x19, 0x1a, 0x10, 0x0e, 0x0c, 0x0a, 0x02, 0x07, 0x1e, 0x1e, 0x1e, 0x1e, 0x1e, 0x1e, 0x1e, 0x1e, 0x1e, 0x1e, 0x1e, 0x1e, 0x08, 0x01, 0x09, 0x0b, 0x0d, 0x0f, 0x1a, 0x19, 0x1f, 0x00,
    0x64, 16, 0x38, 0x05, 0x01, 0xdb, 0x03, 0x03, 0x38, 0x04, 0x01, 0xdc, 0x03, 0x03, 0x7a, 0x7a, 0x7a, 0x7a,
    0x65, 16, 0x38, 0x03, 0x01, 0xdd, 0x03, 0x03, 0x38, 0x02, 0x01, 0xde, 0x03, 0x03, 0x7a, 0x7a, 0x7a, 0x7a,
    0x66, 16, 0x38, 0x01, 0x01, 0xdf, 0x03, 0x03, 0x38, 0x00, 0x01, 0xe0, 0x03, 0x03, 0x7a, 0x7a, 0x7a, 0x7a,
    0x67, 16, 0x30, 0x01, 0x01, 0xe1, 0x03, 0x03, 0x30, 0x02, 0x01, 0xe2, 0x03, 0x03, 0x7a, 0x7a, 0x7a, 0x7a,
    0x68, 13, 0x00, 0x08, 0x15, 0x08, 0x15, 0x7a, 0x7a, 0x08, 0x15, 0x08, 0x15, 0x7a, 0x7a,
    0x60, 8, 0x38, 0x08, 0x7a, 0x7a, 0x38, 0x09, 0x7a, 0x7a,
    0x63, 8, 0x31, 0xe4, 0x7a, 0x7a, 0x31, 0xe5, 0x7a, 0x7a,
    0x69, 7, 0x04, 0x22, 0x14, 0x22, 0x14, 0x22, 0x08,
    0x6b, 1, 0x07,
    0x7a, 2, 0x08, 0x13,
    0x7b, 2, 0x08, 0x13,
    0xd1, 52, 0x00, 0x00, 0x00, 0x04, 0x00, 0x12, 0x00, 0x18, 0x00, 0x21, 0x00, 0x2a, 0x00, 0x35, 0x00, 0x47, 0x00, 0x56, 0x00, 0x90, 0x00, 0xe5, 0x01, 0x68, 0x01, 0xd5, 0x01, 0xd7, 0x02, 0x36, 0x02, 0xa6, 0x02, 0xee, 0x03, 0x48, 0x03, 0xa0, 0x03, 0xba, 0x03, 0xc5, 0x03, 0xd0, 0x03, 0xe0, 0x03, 0xea, 0x03, 0xfa, 0x03, 0xff,
    0xd2, 52, 0x00, 0x00, 0x00, 0x04, 0x00, 0x12, 0x00, 0x18, 0x00, 0x21, 0x00, 0x2a, 0x00, 0x35, 0x00, 0x47, 0x00, 0x56, 0x00, 0x90, 0x00, 0xe5, 0x01, 0x68, 0x01, 0xd5, 0x01, 0xd7, 0x02, 0x36, 0x02, 0xa6, 0x02, 0xee, 0x03, 0x48, 0x03, 0xa0, 0x03, 0xba, 0x03, 0xc5, 0x03, 0xd0, 0x03, 0xe0, 0x03, 0xea, 0x03, 0xfa, 0x03, 0xff,
    0xd3, 52, 0x00, 0x00, 0x00, 0x04, 0x00, 0x12, 0x00, 0x18, 0x00, 0x21, 0x00, 0x2a, 0x00, 0x35, 0x00, 0x47, 0x00, 0x56, 0x00, 0x90, 0x00, 0xe5, 0x01, 0x68, 0x01, 0xd5, 0x01, 0xd7, 0x02, 0x36, 0x02, 0xa6, 0x02, 0xee, 0x03, 0x48, 0x03, 0xa0, 0x03, 0xba, 0x03, 0xc5, 0x03, 0xd0, 0x03, 0xe0, 0x03, 0xea, 0x03, 0xfa, 0x03, 0xff,
    0xd4, 52, 0x00, 0x00, 0x00, 0x04, 0x00, 0x12, 0x00, 0x18, 0x00, 0x21, 0x00, 0x2a, 0x00, 0x35, 0x00, 0x47, 0x00, 0x56, 0x00, 0x90, 0x00, 0xe5, 0x01, 0x68, 0x01, 0xd5, 0x01, 0xd7, 0x02, 0x36, 0x02, 0xa6, 0x02, 0xee, 0x03, 0x48, 0x03, 0xa0, 0x03, 0xba, 0x03, 0xc5, 0x03, 0xd0, 0x03, 0xe0, 0x03, 0xea, 0x03, 0xfa, 0x03, 0xff,
    0xd5, 52, 0x00, 0x00, 0x00, 0x04, 0x00, 0x12, 0x00, 0x18, 0x00, 0x21, 0x00, 0x2a, 0x00, 0x35, 0x00, 0x47, 0x00, 0x56, 0x00, 0x90, 0x00, 0xe5, 0x01, 0x68, 0x01, 0xd5, 0x01, 0xd7, 0x02, 0x36, 0x02, 0xa6, 0x02, 0xee, 0x03, 0x48, 0x03, 0xa0, 0x03, 0xba, 0x03, 0xc5, 0x03, 0xd0, 0x03, 0xe0, 0x03, 0xea, 0x03, 0xfa, 0x03, 0xff,
    0xd6, 52, 0x00, 0x00, 0x00, 0x04, 0x00, 0x12, 0x00, 0x18, 0x00, 0x21, 0x00, 0x2a, 0x00, 0x35, 0x00, 0x47, 0x00, 0x56, 0x00, 0x90, 0x00, 0xe5, 0x01, 0x68, 0x01, 0xd5, 0x01, 0xd7, 0x02, 0x36, 0x02, 0xa6, 0x02, 0xee, 0x03, 0x48, 0x03, 0xa0, 0x03, 0xba, 0x03, 0xc5, 0x03, 0xd0, 0x03, 0xe0, 0x03, 0xea, 0x03, 0xfa, 0x03, 0xff,
    0x3a, 1, 0x66,
    0x3a, 1, 0x66,
    0x11, 0x80, 120,
    0x29, 0x80, 20
))

expander_addr = 0x3F
bus = busio.I2C(board.SCL, board.SDA, frequency=400_000)

if not bus.try_lock():
    raise RuntimeError("Bus already locked")
# Set direction register
bus.writeto(expander_addr, b"\3\xf1")
# Set pull ups
bus.writeto(expander_addr, b"\2\0")
bus.unlock()

t0 = time.monotonic()
dotclockframebuffer.ioexpander_send_init_sequence(
    bus=bus,
    i2c_address=expander_addr,
    gpio_address=1,
    gpio_data_len=1,
    gpio_data=0xf1,
    cs_bit=1,
    mosi_bit=7,
    clk_bit=0,
    init_sequence=init_sequence)
t1 = time.monotonic()
print(t1-t0, "s to send init code")

fb = dotclockframebuffer.DotClockFramebuffer(**TFT_PINS, **TFT_TIMINGS)
disp = dotclockframebuffer.FramebufferDisplay(fb, auto_refresh=True)
while True:
    pass

i get ValueError: GPIO2 in use
from fb = dotclockframebuffer.DotClockFramebuffer(**TFT_PINS, **TFT_TIMINGS)

[jepler]

I'll look into the ValueError tomorrow.

is the reset pin assumed to be on the GPIO expander?