'cst816s: failed reading chip id' with Waveshare 1.69" Touch LCD

RE: 'cst816s: failed reading chip id' with Waveshare 1.69" Touch LCD

lcj — Fri, 28 Jun 2024 11:11:01 GMT

I had pins backwards!!!!

RE: 'cst816s: failed reading chip id' with Waveshare 1.69" Touch LCD

lcj — Thu, 27 Jun 2024 23:00:44 GMT

No idea what this means. Tried changing around the pins. They seem to be off.

I moved the SCL wire from what I thought was for to what I thought was 5 and this is what it looked like:

So, I guess SCL was 4 in this last one and SDA was 5.

RE: 'cst816s: failed reading chip id' with Waveshare 1.69" Touch LCD

lcj — Thu, 27 Jun 2024 11:42:50 GMT

All the demo source files for other platforms (Arduino, ESP32, Pico, Raspberry Pi, and STM32.) are here https://files.waveshare.com/wiki/1.69inch-Touch-LCD-Module/1.69inch_Touch_LCD_Demo.zip

RE: 'cst816s: failed reading chip id' with Waveshare 1.69" Touch LCD

Sigurd Hellesvik — Mon, 24 Jun 2024 12:33:29 GMT

Yes SCL and SDA.

[quote user="jakkra"]No, this means the interrupt pin is working and the touch chip, but not your i2c communication. [/quote]

Agreed, well reasoned

RE: 'cst816s: failed reading chip id' with Waveshare 1.69" Touch LCD

lcj — Sat, 22 Jun 2024 10:49:22 GMT

Is there another way to debug this besides the oscilloscope? Out of curiosity, which lines would I probe? Are they the SCL/SDA?

RE: 'cst816s: failed reading chip id' with Waveshare 1.69" Touch LCD

jakkra — Sat, 22 Jun 2024 08:59:11 GMT

No, this means the interrupt pin is working and the touch chip, but not your i2c communication.

RE: 'cst816s: failed reading chip id' with Waveshare 1.69" Touch LCD

lcj — Fri, 21 Jun 2024 13:30:27 GMT

I've never done that before. I might be able to try it, but I do get this error:

[00:37:04.562,744] <err> cst816s: Could not read x data

When I touch the screen so I would assume the lines are working, right?

RE: 'cst816s: failed reading chip id' with Waveshare 1.69" Touch LCD

Sigurd Hellesvik — Fri, 21 Jun 2024 13:15:20 GMT

Something seems off with the I2C.
Can you probe your I2C lines with a logic analyzer or oscilloscope and see if there is any activity?

RE: 'cst816s: failed reading chip id' with Waveshare 1.69" Touch LCD

lcj — Fri, 21 Jun 2024 12:53:31 GMT

[00:00:00.441,375] <dbg> display_st7789v: st7789v_reset_display: Resetting display
[00:00:01.145,263] <err> cst816s: failed reading chip id
*** Booting nRF Connect SDK v3.5.99-ncs1-1 ***
[00:00:01.149,597] <inf> app: Starting...
[00:00:01.159,210] <dbg> display_st7789v: st7789v_write: Writing 240x28 (w,h) @ 0x0 (x,y)
[00:00:01.166,717] <dbg> display_st7789v: st7789v_write: Writing 240x28 (w,h) @ 0x28 (x,y)
[00:00:01.174,224] <dbg> display_st7789v: st7789v_write: Writing 240x28 (w,h) @ 0x56 (x,y)
[00:00:01.181,732] <dbg> display_st7789v: st7789v_write: Writing 240x28 (w,h) @ 0x84 (x,y)
[00:00:01.192,291] <dbg> display_st7789v: st7789v_write: Writing 240x28 (w,h) @ 0x112 (x,y)
[00:00:01.203,063] <dbg> display_st7789v: st7789v_write: Writing 240x28 (w,h) @ 0x140 (x,y)
[00:00:01.210,571] <dbg> display_st7789v: st7789v_write: Writing 240x28 (w,h) @ 0x168 (x,y)
[00:00:01.218,139] <dbg> display_st7789v: st7789v_write: Writing 240x28 (w,h) @ 0x196 (x,y)
[00:00:01.225,708] <dbg> display_st7789v: st7789v_write: Writing 240x28 (w,h) @ 0x224 (x,y)
[00:00:01.234,344] <dbg> display_st7789v: st7789v_write: Writing 240x28 (w,h) @ 0x252 (x,y)
[00:00:01.243,804] <dbg> display_st7789v: st7789v_write: Writing 53x27 (w,h) @ 94x253 (x,y)
[00:00:02.257,110] <dbg> display_st7789v: st7789v_write: Writing 29x27 (w,h) @ 106x253 (x,y)
[00:00:03.269,714] <dbg> display_st7789v: st7789v_write: Writing 28x27 (w,h) @ 107x253 (x,y)
[00:00:04.281,463] <dbg> display_st7789v: st7789v_write: Writing 27x27 (w,h) @ 107x253 (x,y)
[00:00:05.294,006] <dbg> display_st7789v: st7789v_write: Writing 30x27 (w,h) @ 106x253 (x,y)
[00:00:06.306,610] <dbg> display_st7789v: st7789v_write: Writing 29x27 (w,h) @ 106x253 (x,y)
[00:00:07.319,244] <dbg> display_st7789v: st7789v_write: Writing 29x27 (w,h) @ 106x253 (x,y)
[00:00:08.330,902] <dbg> display_st7789v: st7789v_write: Writing 28x27 (w,h) @ 106x253 (x,y)
[00:00:09.342,651] <dbg> display_st7789v: st7789v_write: Writing 28x27 (w,h) @ 106x253 (x,y)

RE: 'cst816s: failed reading chip id' with Waveshare 1.69" Touch LCD

Sigurd Hellesvik — Fri, 21 Jun 2024 12:30:16 GMT

Try to increase CONFIG_DISPLAY_LOG_LEVEL and see if you get any logs from the display init driver.

RE: '

lcj — Thu, 20 Jun 2024 15:06:24 GMT

LOG_INF("lv_btn_click_callback called");

and

CONFIG_LV_Z_POINTER_INPUT=y

RE: '

Sigurd Hellesvik — Thu, 20 Jun 2024 12:58:04 GMT

Hi,

[quote user=""]with minimal modifications:[/quote]

Could you explain which modifications?

Regards,
Sigurd Hellesvik