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adafruit / Adafruit_CircuitPython_ILI9341

CircuitPython display driver for ILI9341
MIT License
14 stars 11 forks source link

SPI baudrate #24

Closed peterhinch closed 3 years ago

peterhinch commented 3 years ago

In your instructions page your code sets the baudrate to 24MHz. Yet your ILI9341 datasheet P231 section 19.3.4 specifies a minimum clock cycle time of 100ns for write cycles.

I have written a driver to enable my MicroPython nano-gui to work with your ILI9341 displays. I am reluctant to recommend an overclock without some justification. I have a high regard for your company's engineering skills and am sure you wouldn't risk a support nightmare so please could you explain the justification as 10MHz really is rather slow.

FWIW my board works fine at 40MHz...

ladyada commented 3 years ago

if you are unsure, make the default freq 10mhz and folks could try running it faster. its your code 😁