How to use printf

syedhashmiraza · ‎2024-10-18

hey how to use printf in stm32f429i-disc1 board and my mcu is stm32f103cbt6

mƎALLEm · ‎2024-10-19

Hello,

Are you sure SB11 and SB15 are soldered and JP4 not fitted?

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Andrew Neil · ‎2024-10-21

As I said to you earlier, and @Tesla DeLorean has now also said:

Get the basic direct UART output working before adding the printf stuff.

ie, first get it working with HAL_UART_Transmit() - to prove that your basic setup is functional.

A complex system that works is invariably found to have evolved from a simple system that worked.
A complex system designed from scratch never works and cannot be patched up to make it work.

syedhashmiraza · ‎2024-10-21

this one also not working

mƎALLEm · ‎2024-10-21

Did you check the schematics (as I described previously)?

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Andrew Neil · ‎2024-10-21

@syedhashmiraza wrote:
this one also not working

Unhelpful.

Show exactly what you have done - a minimum but complete example.

Also confirm your hardware setup.

See the Posting Tips for how to post your code, etc:

https://community.st.com/t5/community-guidelines/how-to-write-your-question-to-maximize-your-chances-to-find-a/ta-p/575228

The better the information you provide, the quicker you will get a good answer.

Remember that nobody knows you, or what your setup is, or what you have done other than from what you post.

So far, you have given very little to go on

A complex system that works is invariably found to have evolved from a simple system that worked.
A complex system designed from scratch never works and cannot be patched up to make it work.

Andrew Neil · ‎2024-10-21

New Knowledge Base article today, "Implementing UART receive and transmit functions on an STM32":

https://community.st.com/t5/stm32-mcus/implementing-uart-receive-and-transmit-functions-on-an-stm32/ta-p/694926

This shows you how to do the basic HAL_UART_Transmit() - START HERE !

See also the linked Wiki article, "Getting started with UART":

https://wiki.st.com/stm32mcu/wiki/Getting_started_with_UART

A complex system that works is invariably found to have evolved from a simple system that worked.
A complex system designed from scratch never works and cannot be patched up to make it work.

syedhashmiraza · ‎2024-10-27

hello

can you provide me a disign setting for printf

Andrew Neil · ‎2024-10-28

@syedhashmiraza wrote:
can you provide me a disign setting for printf

Sorry - what do you mean by that?

Have you got the basic HAL UART working yet?

A complex system that works is invariably found to have evolved from a simple system that worked.
A complex system designed from scratch never works and cannot be patched up to make it work.

mƎALLEm · ‎2024-10-29

@syedhashmiraza wrote:

hello

can you provide me a disign setting for printf

Hello,

Attached a project that prints "Hollo World" using printf over USART1.

Need first to check which COM was allocated by windows to your STLINK VCP in Device manager:

Then in the HyperTerminal to configure these parameters:

Baudrate: 115200

Datasize: 7

Parity: None

Handshake: Off

Hope it helps.

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Andrew Neil · ‎2024-11-25

Same question repeated here, a few weeks later:

https://community.st.com/t5/stm32-mcus-boards-and-hardware/how-to-redirect-printf-to-a-uart-on-stm32f429i-disc1/m-p/746656

A complex system that works is invariably found to have evolved from a simple system that worked.
A complex system designed from scratch never works and cannot be patched up to make it work.