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"SPI transfer timed out" #47

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jin-eld opened this issue Aug 3, 2019 · 0 comments

jin-eld commented Aug 3, 2019 •

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Hi,

I am trying to set up a 3.5" TFT LCD screen from Waveshare, which is supposed to work in TinkerOS 2.0.7

However in dmesg log I get:

[ 4.077948] fb_ili9486 spi2.0: SPI transfer timed out
[ 4.078023] fb_ili9486 spi2.0: fbtft_update_display: write_vmem failed to update display buffer

I am getting those error messages with TinkerOS 2.0.10, kernel:
Linux tinkerboard 4.4.132+ #1 SMP Wed May 15 19:37:54 CST 2019 armv7l GNU/Linux

I found a forum post suggesting that it got broken in 2.0.8, so I wonder if this is a regression in the SPI driver and if you are aware of it?

I was following this guide:
https://tinkerboarding.co.uk/wiki/index.php/3.5%22_LANDZO_SPI_TouchScreen

I am using the overlay "waveshare35a-tinker"

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