i2c normal mode - generated code contains LL_I2C_EnableFastModePlus

[PR.10]

Hi,

I have project in cube ide 1.18.1. with stm32h523.
The generated code void MX_I2C1_Init(void) has LL_I2C_EnableFastModePlus(I2C1); at the end despite the configuration is set to normal (not fast or fast+). This looks like generator bug because I don't see the same error in stm32g071 project.
I explicitly need the normal i2c mode setting for its sink current limit. Otherwise this bug may actually cause a chip damage due to over current.

Can anyone confirm if this is indeed a bug?

It is easy to reproduce. just create empty project with i2c and set the driver to LL. the 100kHz normal is the default.

I tested it with real cpu and even if I replace it with LL_I2C_DisableFastModePlus it still seems to sink >20mA so it does not behave as the datasheet suggests. I did not find specification for current in normal mode, but I would expect something above 4mA based in i2c protocol spec and safe margin below 25mA which is the damage limit according datasheet.

[Mahmoud Ben Romdhane]

Hello @PR.10 ,

 

First let me thank you for posting.

I am currently studying your request, and I will get back to you ASAP.

 

Thanks.

Mahmoud

 

[Mahmoud Ben Romdhane]

Hello @PR.10 ,

 

Let me thank you for bringing this issue to our attention.

An internal ticket is raised to the Development Team (Ticket Number: 209242).

 

Thanks.

Mahmoud

[PR.10]

can I see the ticket or will you post the result here?

[Mahmoud Ben Romdhane]

Hello @PR.10 ,

 

I will let you know as soon as the problem is solved.

 

Thanks.

Mahmoud