Wrong USART3 pins on Nucleo-F756ZG

[Kamil Duljas]

Hi,

On my Nucleo-F756ZG, when I generate code for USART3 that's by default connected to ST-LINK , Cube sets pins for morpho connector (PB10 PB11) instead of alternate function (PD8 PD9). I also use Nucleo-L476RG and for this board, Cube set alternate funtion pin for Usart2 default connected to ST-LINK.

[Ghofrane GSOURI]

Hello @kamil Duljas​ 

First let me thank you for posting .

I checked with CubeMX 6.8.0 and this is what I got concerning USART3 pins on Nucleo-F756ZG

USART3_TX-->PD8

USART3_RX-->PD9

Thx

Ghofrane

[Kamil Duljas]

Sorry, i forgot mention that i set it in STM32CubeIde:

[Kamil Duljas]

Also in CubeMx, when you uncheck pd8 and pd9 pins and enable usart3 it set other pins

[Ghofrane GSOURI]

Hello again @kamil Duljas​ 

By checking the datasheet ,and based on Table 10. STM32F756xx pin and ball definition (continued)

USART3_TX-->PB10

USART3_RX-->PB11

[Kamil Duljas]

I know and it is ok. I didin't say that the pins is completely wrong. I notice that on Nucleo L476 after choose USART2 CubeMx is setting pins connected to st-link, but on F756ZG Not. The User must find alternate funtion for USART3 there are connected with ST-LINK. In my opinion it is not consist and sure it is not user friendly

[Kamil Duljas]

My request is:

On Nucleo F756ZG,in CubeMx, by default the pins PD8 PD9 should be set, not PB10 and PB11

[Tesla DeLorean]

Seems like a reasonable request, you'd think the tools would have a weighting based on the board specific pin usage.​

[Kamil Duljas]

Yes, for example board Nucleo L476 set pins connected with st link. It's very convenient

[Kamil Duljas]

@Ghofrane GSOURI​ any decision in this topic?

[Kamil Duljas]

@Ghofrane GSOURI​ ?

[Kamil Duljas]

@Ghofrane GSOURI​ ? Could you answer?

[Tesla DeLorean]

@Sara BEN HADJ YAHYA​ 

Not sure whom to flags this with.

Needs some Board Level Awareness related to suggested pin defaults for peripherals. Will lead to less mistakes, and more code ​working on first try.

[Sara BEN HADJ YAHYA]

Hello @Community member​ ,

@Ghofrane GSOURI​  will investigate this issue and provide an answer asap.

Sara.

[Kamil Duljas]

what's up?