PiTFT CAPACITIVE - unknown chip id - no touch

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grabbit
 
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PiTFT CAPACITIVE - unknown chip id - no touch

Post by grabbit »

Hi there,

i'm experiencing some problems getting the touch functionality of the pitft to work. I've got the same problem with non-working touch and unknown chip id as described in this thread: viewtopic.php?f=47&t=47326

Dmesg says:

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[   12.837101] stmpe-spi spi0.1: unknown chip id: 0x0
[   12.847278] stmpe-spi: probe of spi0.1 failed with error -22
Also the module stmpe_ts doesn't load:

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pi@raspberrypi ~ $ lsmod | grep stmpe
stmpe_device            5628  0
And there ist no device /dev/input/touchscreen

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pi@raspberrypi ~ $ ls /dev/input/tou*
ls: cannot access /dev/input/tou*: No such file or directory
I'm testing with an RPI B+ and the ready to go image from https://learn.adafruit.com/adafruit-pit ... sy-install
I already triple-checked the solderings (even cleaned & resoldered) and checked conductivity - eveything seems fine. Several reboots (cold and warm) didn't change anything, too.

Here are two pictures of the solderings:
Image
Image

Do you have any suggestions for me?

Thanks and Best Regards,
Felix

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adafruit_support_rick
 
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Re: PiTFT CAPACITIVE - unknown chip id - no touch

Post by adafruit_support_rick »

That image is for the resistive touchscreen PiTFT. You have a capacitive touchscreen, which doesn't use the stmpe touch driver.
See this tutorial for the capacitive version
https://learn.adafruit.com/adafruit-2-8 ... sy-install

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grabbit
 
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Re: PiTFT CAPACITIVE - unknown chip id - no touch

Post by grabbit »

adafruit_support_rick wrote:That image is for the resistive touchscreen PiTFT. You have a capacitive touchscreen, which doesn't use the stmpe touch driver.
See this tutorial for the capacitive version
https://learn.adafruit.com/adafruit-2-8 ... sy-install
Shame on me - it's been that nasty fault. Now everything works as expected.

Thanks!

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