STM32 UART using interrupt transmitts by byte or data elements array?

[ManhPham]

Hello everyone,

I sent the data by UART with command:

uint16_t Size[8];

HAL_UART_Transmit_IT(UART_HandleTypeDef *huart, const uint8_t *pData, uint16_t Size)

Question: Size on this command is 16 bytes or Size is 8 data elements of array?

[Andrew Neil]

I know he doesn't, but that is what the uint16_t feature of this function is for.

It's to allow you to provide 9 data bits for the 9-bit mode.

So if you want to test that this feature of this function is working, that's what you need to look for.

[Karl Yamashita]

Not sure why you keep saying 9 data bits? We're passing 16 data bits.