STM32 CubeMX 4.25 bug?

[AndreaC]

Posted on March 28, 2018 at 19:27

When generating code using LL libraries for an STM32L011F4Ux MCU, I found that enabling DMA for USART2 RX and TX and selecting DMA channels 2 and 3 makes the Cube create non working code.

I checked the RM for this MCU and at chapter 10.4.7 'DMA channel selection register (DMA_CSELR)' I saw that channels 2 and 3 are not the right ones for USART2.

Anyway, the Cube lets you select the right channels (i.e. 4 and 5) and, with those, everything seems OK.

Can you please check?

Thanks,

Andrea

#stm32-cube #dma #stm32l011

[Imen.D]

Posted on April 03, 2018 at 16:37

Hello

Coccon.Andrea

You are right,I raised this issue internally to CubeMx team for fix.

Thank you for posting your finding.

Best Regards

Imen.

[Houda GHABRI]

Posted on May 03, 2018 at 16:28

Coccon.Andrea

‌

Hi,

I'm not able to reproduce the problem, can you please send me the ioc ?

What did you mean by '

non working code'? That there is compilation error?

regards,

Houda

[AndreaC]

Posted on May 04, 2018 at 09:37

Hi Houda,

the code generated doesn't work because 2 and 3 are not the right channels to set when using USART2 in DMA mode.

but, as you can see, Cube sets these channels when adding DMA.

Have a nice day,

Andrea

________________

Attachments :

Cube_DMA_issue.ioc.zip : https://st--c.eu10.content.force.com/sfc/dist/version/download/?oid=00Db0000000YtG6&ids=0680X000006HxeP&d=%2Fa%2F0X0000000b0W%2F70Pm4kdu7K8T2SPHoe_FPq1LSin0YssmIIGlOmWKBOg&asPdf=false

[Houda GHABRI]

Posted on May 18, 2018 at 11:46

Hi

Coccon.Andrea

,

I confirm it is a bug and it will be fixed next release.

Thanksfor rising this problem.

regards,

Houda