UART Help

[Andrei Gheorghiu]

Posted on November 03, 2017 at 06:51

Hello,

I am using an STM 32 F401 Nucleo and i want to send numbers from PC via UART.

For example I need to set the frequency and amplitude.

Can some one help me to provide the code?

Thank you in advance.

[Andrew Neil]

Posted on November 03, 2017 at 12:23

PC code, or 

STM32F401 code?

http://www.lmgtfy.com?q=STM32F401+UART

 

[Vasile Guta_Ciucur]

Posted on November 03, 2017 at 13:03

Andrei, in your STM32CubeF4 package you should find UART examples (Polling, IT and DMA) for your Nucleo board. Download it from here if you don't have it yet:

http://www.st.com/en/embedded-software/stm32cubef4.html

 

[Andrei Gheorghiu]

Posted on November 03, 2017 at 16:30

Salut Vasile,

Ai mai  folosit placa  te pricepi?

[Andrei Gheorghiu]

Posted on November 03, 2017 at 16:33

Hi,

For STM32F401.

[Tesla DeLorean]

Posted on November 03, 2017 at 16:58

Should be able to use USART2 via PA2/PA3, buffer inbound data, parse, and process with sscanf(), etc.

Might want to start with output, and adapt

STM32Cube_FW_F4_V1.16.0\Projects\STM32F401RE-Nucleo\Examples\UART\UART_Printf\Src\main.c

[Vasile Guta_Ciucur]

Posted on November 03, 2017 at 18:23

Salut, am alta placa, cu viteza mai mica, Nucleo-L152RE, prima de genul asta si primul meu micro STM32. Invat din mers

[Andrei Gheorghiu]

Posted on November 03, 2017 at 18:56

vreau sa trimit niste numere de la tastatura catre placa crezi ca i stii cum se face?

De exemplu sa setez frecventa si amplitudinea.

[Andrei Gheorghiu]

Posted on November 04, 2017 at 11:51

Hi,how can i use scanf ? is not working

[Andrew Neil]

Posted on November 04, 2017 at 13:08

scanf is a standard 'C' library function:

http://www.cplusplus.com/reference/cstdio/scanf/

To find out how to link a UART to

http://www.cplusplus.com/reference/cstdio/stdin/

, you will have to study your toolchain documentation.

Alternatively, you could just receive characters form the UART into a buffer to form a string, and use sscanf:

http://www.cplusplus.com/reference/cstdio/sscanf/

Or you could just parse the received characters manually.

Guta_Ciucur.Vasile

‌ has already pointed you to UART examples...