How hold I2C turn on in idle state

RE: How hold I2C turn on in idle state

Michal — Tue, 23 Aug 2022 11:01:19 GMT

It is a bit up to you, but at least try it after it's fully initialized, or maybe right after sending the first i2c command?

Best regards,

Michal

RE: How hold I2C turn on in idle state

Hannibalhz — Tue, 23 Aug 2022 09:31:46 GMT

Dear Michal

Did you mean I can use pm_device_state_lock() function to lock the I2C when start init or start work time?

what time is use use pm_device_state_lock()?

Please give me a good suggestion.

Best regards.

RE: How hold I2C turn on in idle state

Michal — Mon, 22 Aug 2022 13:49:22 GMT

Hello,

I see that there is also a function pm_device_state_lock(). Maybe try that one out?

Best regards,

Michal

RE: How hold I2C turn on in idle state

Hannibalhz — Mon, 22 Aug 2022 09:23:41 GMT

Dear Michal

The error code is -5, message shows:error on i2c line occurred for message 0

So, may I use the pm_device_busy to solve this problem?

If I can use it, what should I do?

Please give me some good suggestion.

Best regards.

RE: How hold I2C turn on in idle state

Michal — Fri, 19 Aug 2022 10:30:16 GMT

Hello,

So are you using that function directly or through the Zephyr's I2C driver?

I personally did not see any issues myself while using that, but I have contacted the developers about your case.

I would still appreciate if you could send me some code that's failing for troubleshooting in the meantime.

Best regards,

Michal

RE: How hold I2C turn on in idle state

Hannibalhz — Fri, 19 Aug 2022 02:37:41 GMT

Dear Michal

I use NCS\v2.0.0\zephyr\drivers\i2c\i2c_nrfx_twi.c/i2c_nrfx_twi_transfer() function.

I would like to know how to use pm_device_busy_set() and pm_device_busy_clear() to contral the I2C work state.

Please give me some good suggestions.

Best regards.

RE: How hold I2C turn on in idle state

Michal — Thu, 18 Aug 2022 12:39:11 GMT

Hello,

I tried to look into it, but I could not reproduce your issue. I will ask the developers about those two functions though.

Which I2C functions were you using for the transfer?
How does the CPU enters the idle state?

Would it be possible to upload the offending code (preferably a minimal working example if possible), so that I could take a better look into it?

Best regards,

Michal