STM32F4xx and UART7/8 Topic is solved

[becafuel]

Hello,

is there a way to use UART7 and UART8 on STM32F4xx MCUs ?
So far, only uartv2 offer such support but it does not compile for F4


Best regards,
__________
Christophe

[Giovanni]

Are those UARTs present of the F4? which one?

Giovanni

[becafuel]

Yes, there are present for example on STM32F427VGT, STM32F429IGH, STM32F429ZI, to name a few.

[Giovanni]

This will require an update of USARTv1, you cannot use USARTv2 with the wrong parts.

Giovanni

[becafuel]

Oh, thank you for the reply.

I will then wait for such update.


Best regards,
________
Christophe

[Giovanni]

Hi,

I double checked, UART 7 and 8 are supported in latest version. What version are you using?

Giovanni

[becafuel]

Hello Giovanni,

[Giovanni]

Are you using the UART driver or the Serial driver? those UARTs are supported in the serial driver.

Giovanni

[becafuel]

I am using UART driver, here. Serial driver is used to create a connection to a PC (via USB).

Are you saying that Serial can be used to drive external peripherals ? If so, what are the differences between Serial and UART ? And when should I use one or the other ?
You may have lost me, here.

[Giovanni]

Hi,

Serial is buffered and uses circular queues without DMAs, UART is unbuffered and uses DMA for transfers.

Serial is best used for general terminal-like I/O, UART is best for fixed lenght message-based protocols. In general Serial is much more commonly used.

Giovanni