Problem with stm32l4 tim16

[Rsu.1]

I have use stm32l412cbt6 PB9 to input function and i can get the input data,then i configure PB9 to alternate function GPIO_AF14_TIM16 and i can not get the input data.Under the same configuration，PA3 alternate function GPIO_AF1_TIM2 can get the input data.Please give me some advice.

[waclawek.jan · Accepted solution]

Maybe there's an error in the the 'L412 datasheet, the AF14 column for PB (and PC) compared to other 'L4 appears to be shifted down one position.

TIM16_CH1 appears to be at PB8 AF14. See also the pin definitions table.

@Imen DAHMEN​ , can you please check if this is the case?

Thanks,

JW

[Rsu.1]

I reread the manual from ST official website，the table show that PB9 alternate function AF14 

[waclawek.jan]

> I reread the manual from ST official website，the table show that PB9 alternate function AF14 

I see that that's in the AF table; however, as I said above I believe this is an error, because

• it's shifted when compared to other 'L4, and ST usually tries to keep things pin compatible
• the pin definitions table in the same DS also indicates TIM16_CH1 to be on PB8:

JW

[Uwe Bonnes]

This is what I get from the device database XML files:

ethernut/nut/include/arch/cm3/stm/generated> grep TIM16_ stm32l41x_pinmux.h

#define TIM16_BKIN_FUNC         58

#define TIM16_CH1_FUNC          59

#define TIM16_CH1N_FUNC         60

       ((gpio == PA06) && (func == TIM16_CH1_FUNC          )) ? 14 : \

       ((gpio == PB05) && (func == TIM16_BKIN_FUNC         )) ? 14 : \

       ((gpio == PB06) && (func == TIM16_CH1N_FUNC         )) ? 14 : \

       ((gpio == PB08) && (func == TIM16_CH1_FUNC          )) ? 14 : \

[waclawek.jan]

Hi Uwe, ,

If you have a 'L412 board on hand, can you please try, which one is the case?

JW

@Uwe Bonnes​ 

[Rsu.1]

i have try a 'l412board and confirm that PB8 alternate AF14

[Imen.D]

Hello,

You are right, TIM16_CH1 should be at PB8 alternate function AF14 instead of PB9.

We will correct this typo in the coming release of the Datasheet.

Best Regards,

Imen

[waclawek.jan]

Thanks, Imen.

Please note, that's not only PB8, but the whole PB and PC in column AF14 are shifted down by one cell.

Jan

@Imen DAHMEN​ 

[Imen.D]

Yes, well noted. Thank you Jan.

This is raised internally to the appropriate team for correction.