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ws_pico_res_touch.py Add SD card nd baudrate notes.

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Peter Hinch 2022-05-07 18:48:32 +01:00
rodzic 03c067fd5d
commit a544cb7484
1 zmienionych plików z 11 dodań i 3 usunięć
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setup_examples/ws_pico_res_touch.py
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@ -15,12 +15,20 @@ prst = Pin(15, Pin.OUT, value=1)
pbl = Pin(13, Pin.OUT, value=1)
gc.collect() # Precaution before instantiating framebuf
# Runs at 60MHz here, supported by ST7789 datasheet.
# If problems arise, try reducing to 30MHz.
spi = SPI(1, 60_000_000, sck=Pin(10), mosi=Pin(11), miso=Pin(12))
# Max baudrate produced by Pico is 31_250_000. ST7789 datasheet allows <= 62.5MHz.
# Note non-standard MISO pin. This works, verified by SD card.
spi = SPI(1, 33_000_000, sck=Pin(10), mosi=Pin(11), miso=Pin(12))
# Define the display
# For portrait mode:
# ssd = SSD(spi, height=320, width=240, dc=pdc, cs=pcs, rst=prst)
# For landscape mode:
ssd = SSD(spi, height=240, width=320, disp_mode=PORTRAIT, dc=pdc, cs=pcs, rst=prst)
# Optional use of SD card. Requires official driver. In my testing the
# 31.25MHz baudrate works. Other SD cards may have different ideas.
# from sdcard import SDCard
# import os
# sd = SDCard(spi, Pin(22, Pin.OUT), 33_000_000)
# vfs = os.VfsFat(sd)
# os.mount(vfs, "/fc")