Bug in LL_ADC_REG_SetSequencerRanks() at stm32h7xx_ll_adc.h

[FBaev.1]

For Channel=5 and Rank=1 the result is ADC_SQR1=0xA (incorrect).

Should be 0x140.

[KDJEM.1]

Hello @FBaev.1​ and welcome to the community :smiling_face_with_smiling_eyes:,

Could you please provide more details on the issue:

• Which device/board and Cube firmware version are you using?
• Which STM32CubeMX and STM32CubeIDE versions are you using?

Make sure to use latest release of tools and last STM32Cube FW_H7 V1.11.0 firmware package.

Thank you.

Kaouthar

[FBaev.1]

Hello Kaouthar,

Thank you for the reply.

I'm using the STM32CubeIDE Version: 1.12.0 and STM32Cube_FW_H7_V1.11.0.

The board is a proprietary one based on the STM32H743ZGT6.

The issue can be observed on any evaluation board.

Possible software example is "LwIP_HTTP_Server_Raw" for STM32H743I-EVAL board.

Best regards,

Fedor

[KDJEM.1]

Hello @FBaev.1​ ,

Thank you for this clarification.

I made some tests with Nucleo-H723ZG and I didn't find any issue and I get ADC_SQR1=0x140.

I will check again with Eval board and I will get back to you as soon as possible. 

Thank you.

Kaouthar

[FBaev.1]

Hello Kaouthar,

You wrote:

> I made some tests with Nucleo-H723ZG

How exactly you obtained the ADC_SQR1=0x140?

What is the MODIFY_REG formulae in the LL_ADC_REG_SetSequencerRanks() in your test project?

Thank you,

Fedor

[KDJEM.1]

Hi @FBaev.1​ ,

> How exactly you obtained the ADC_SQR1=0x140?

• Enable the ADC1 with Channel=5 and Rank=1 with STM32CubeMx6.7.0 version.

 

• Generate the code with LL using STM32CubeIDE 1.12.0.
• Debug project and execute the code step by step.
• Check the ADC_SQR1 register value in the SFRs. In this case the ADC_SQR1 =0x140.

The MODIFY_REG formula in the LL_ADC_REG_SetSequencerRanks() is

MODIFY_REG(*preg, ADC_CHANNEL_ID_NUMBER_MASK_POSBIT0 << (Rank & ADC_REG_RANK_ID_SQRX_MASK), ((Channel & ADC_CHANNEL_ID_NUMBER_MASK) >> ADC_CHANNEL_ID_NUMBER_BITOFFSET_POS) << (Rank ADC_REG_RANK_ID_SQRX_MASK));

Also with the STM32H757I-Eval board, with Channel=5 and Rank=1, the ADC_SQR1=0x140.

I hope this help you to solve the issue :) !

Kaouthar

[FBaev.1]

I performed the same steps - i.e.

• Generate the code with LL using STM32CubeIDE 1.12.0.
• Debug project and execute the code step by step.
• Check the ADC_SQR1 register value in the SFRs.

and see that ADC_SQR1=0xA .

Still not clear how:

((Channel & ADC_CHANNEL_ID_NUMBER_MASK) >> ADC_CHANNEL_ID_NUMBER_BITOFFSET_POS) << (Rank & ADC_REG_RANK_ID_SQRX_MASK)

can be evaluated for 0x140 for Channel=5 and Rank=1.

[FBaev.1 · Accepted solution]

Dear Kaouthar,

Thank you for your support.

The issue was on my side.

Of course, I modified the structure element (in main.c) by hand and did not realize that the Rank=1 corresponds to:

sConfig.Rank = ADC_REGULAR_RANK_1;

but not:

sConfig.Rank = 1;

Best regards,

Fedor

[KDJEM.1]

Hello @FBaev.1​ ,

Glad to know that the issue is already fixed.

Thank you for your contribution in STCommunity :) .

Kaouthar