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wt32sc01-plus: pins from the datasheet, freq=, and a 10 MHz bus #122

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Merged
bdbarnett merged 4 commits into from
Oct 6, 2026
Merged

wt32sc01-plus: pins from the datasheet, freq=, and a 10 MHz bus #122

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d45dc63
wt32sc01-plus: pins from the datasheet (no LCD chip-select, SD on 38-…
bdbarnett Oct 6, 2026
eb94494
wt32sc01-plus: drive the i80 bus at 20 MHz; the bus's 30 MHz default …
bdbarnett Oct 6, 2026
a4b004f
wt32sc01-plus: 10 MHz on the i80 bus; 20 MHz still misplaced LVGL upd…
bdbarnett Oct 6, 2026
d8a16a8
wt32sc01-plus: 15 MHz, the ST7796's rated write speed, clean on the g…
bdbarnett Oct 6, 2026
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2 changes: 1 addition & 1 deletion board_configs/busdisplay/i80/ili9341_i80_rp2040/board_config.py
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Original file line number Diff line number Diff line change
Expand Up @@ -34,7 +34,7 @@
power_pin=None,
power_on_high=True,
)
i2c = I2C(0, sda=Pin(16), scl=Pin(17), frequency=100_000)
i2c = I2C(0, sda=Pin(16), scl=Pin(17), freq=100_000)
touch = FT6x36(i2c)
touch_rotation_table = None

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10 changes: 8 additions & 2 deletions board_configs/busdisplay/i80/wt32sc01-plus/board_config.py
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Original file line number Diff line number Diff line change
Expand Up @@ -13,11 +13,17 @@
# ST7796(reset=4)
reset = Pin(4, Pin.OUT, value=1)

# Pins from the board's datasheet (Panlee ZX3D50CE02S-USRC-4832, Tab. 5). The
# LCD has no chip-select line; GPIO 6 is the touch controller's SDA.
display_bus = I80Bus(
command=0,
chip_select=6,
chip_select=None,
write=47,
data_pins=[9, 46, 3, 8, 18, 17, 16, 15],
# 15 MHz, the ST7796's rated write cycle (66 ns). Proven on the glass
# 2026-10-05: at the bus's 30 MHz default the panel showed noise, and at
# 20 MHz LVGL's updates landed on the wrong rows.
frequency=15_000_000,
)

display_drv = ST7796(
Expand All @@ -40,7 +46,7 @@
power_pin=None,
power_on_high=True,
)
i2c = I2C(0, sda=Pin(6), scl=Pin(5), frequency=100_000)
i2c = I2C(0, sda=Pin(6), scl=Pin(5), freq=100_000)
touch = FT6x36(i2c)
touch_rotation_table = None

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4 changes: 2 additions & 2 deletions board_configs/busdisplay/i80/wt32sc01-plus/board_peripherals.py
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Expand Up @@ -10,12 +10,12 @@ def load_peripherals(ns):


def sdcard():
"""SPI microSD when present (CS=GPIO41 common on WT32-SC01 Plus)."""
"""The microSD slot over SPI (datasheet Tab. 4: CS 41, MOSI 40, CLK 39, MISO 38)."""
from machine import Pin, SoftSPI

from sdcard import SDCard

spi = SoftSPI(baudrate=1_000_000, sck=Pin(12), mosi=Pin(11), miso=Pin(13))
spi = SoftSPI(baudrate=1_000_000, sck=Pin(39), mosi=Pin(40), miso=Pin(38))
return SDCard(spi, Pin(41, Pin.OUT, value=1))


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