Bug in STM32F2 ADC low level driver LL_ADC_REG_Init regarding sequencerlength

Richy · ‎2018-09-13

STM32F2: (possibly other families like F4 may be affected too - not verified)

Library: STM32Cube_FW_F2_V1.7.0

Component:

ADC Low Level Driver (file stm32f2xx_ll_adc.c)

Affected function: LL_ADC_REG_Init

register CR1 is wrongly initialized with SequencerLength which should be written into SQR1 register only. SequencerLength is additionally written by function LL_ADC_REG_SetSequencerLength in function LL_ADC_REG_Init, which is correct.

Workaround: set sequencer length to LL_ADC_REG_SEQ_SCAN_DISABLE in initialization structure used by function LL_ADC_REG_Init.

Afterward call LL_ADC_REG_SetSequencerLength with the sequencer legnth required by your application.

HAL implementation seems to be correct.

Amel NASRI · ‎2019-12-10

Hello,

Please note that the fix is available in the patch 1.24.2 of STM32CubeF4 package (already available on the web).

-Amel

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View solution in original post

Amel NASRI · ‎2018-09-24

Hi @Richy ,

Thanks for reporting this issue.

I confirm that it is valid for STM32F4 and I would like to inform you that it is tracked internally to be fixed in coming versions of Cube packages.

-Amel

To give better visibility on the answered topics, please click on Accept as Solution on the reply which solved your issue or answered your question.

Amel NASRI · ‎2019-12-10

Hello,

Please note that the fix is available in the patch 1.24.2 of STM32CubeF4 package (already available on the web).

-Amel

To give better visibility on the answered topics, please click on Accept as Solution on the reply which solved your issue or answered your question.