non standard TFT with touch does not work - Raspberry Pi Forums

problem: "non standard" ft5406 touch not work
situation:
- compute modul v1.1, 2016-09-23-raspbian-jessie-lite
- display: 664350_010_edt_etm0700g0dh6 (800x480 5,7" tft)
- touch controller: ft5406
followed steps on https://www.raspberrypi.org/documentati ... display.md
- connected gpio0 cd1sda, gpio1 cd1scl
- dmesg says: touchscreen not detected
- int (of ft5406) not connected
- lsmod: rpi_ft5406 3324 0
- lsmod: i2c_dev 6578 0
- config.txt not touched

@ startup can see short communication between compute modul , touch on oscilloscope (on scl , sda), guess 6 bytes. have idea why communication between compute modul , "non standard display" touch ft5406 controller breaks?

raspiator wrote:problem: "non standard" ft5406 touch not work
situation:
- compute modul v1.1, 2016-09-23-raspbian-jessie-lite
- display: 664350_010_edt_etm0700g0dh6 (800x480 5,7" tft)
- touch controller: ft5406
followed steps on https://www.raspberrypi.org/documentati ... display.md
- connected gpio0 cd1sda, gpio1 cd1scl
- dmesg says: touchscreen not detected
- int (of ft5406) not connected
- lsmod: rpi_ft5406 3324 0
- lsmod: i2c_dev 6578 0
- config.txt not touched

@ startup can see short communication between compute modul , touch on oscilloscope (on scl , sda), guess 6 bytes. have idea why communication between compute modul , "non standard display" touch ft5406 controller breaks?

can have several reasons why communication stops ..

why not use official 7in display, sniff i2c data traffic (i.e. using logic analyzer protocol capability (like i.e. https://www.saleae.com/) instead of scope) , let 'non standard touch' send same commands @ startup.
not expect rpi foundation answer topic...

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