Is it possible to send word(2 byte) data through UART when we set data wordlength of 8 bits???

[TH.16.336]

Hi,

I am using STM32F446ZE NUCLEo board. This board has many uarts and the Data Register is of 32 bit wide but maximum can be used is 9 bits, others are reserved.

I have configured one UART channel UART5 and I am able to send series of byte data from my terminal to this channel. Like below,

0x21 0x22 0x23 0x24 0x25 0x26 0x27 0x28

What I want to know is, is it possible to send word (2 byte) data from my terminal and handle the data in the controller? Like 0x5354 0x5455 0x5556

I have a requirement for this kind of data but I am stuck as I know it's not possible atleast for my knowledge.

Please help.

[waclawek.jan]

UART word length are traditionally limited to 8 or 9 bits, as increasing bit length increases requirements for clock precision on both ends.

For longer datan words, you simply transfer them as individual bytes and then join them together in software.

JW

[Pavel A.]

To explain a little more on Jan's reply - you are probably confused by the UART driver from the ST "HAL" library.

It uses 16-bit words if the UART is in 9-bit *data* mode, simply because otherwise 9 bits of data don't fit in a byte.

The UART sends data character by character. Length of the character can be 8 or 9 bits (+ framing), never 16-bits.

Just send as many bytes as you need, one by one, in any order that you want.

-- pa

[dbgarasiya]

you can not send same time, you can send character by charater and manage at receiver side