HAL_USART_Transmit_IT() function
Simplex Send an amount of data in non-blocking mode.
Arguments
husart
Pointer to a USART_HandleTypeDef structure that contains the configuration information for the specified USART module.
pTxData
Pointer to data buffer (u8 or u16 data elements).
Size
Amount of data elements (u8 or u16) to be sent.
Return value
HAL status
Notes
When USART parity is not enabled (PCE = 0), and Word Length is configured to 9 bits (M1-M0 = 01), the sent data is handled as a set of u16. In this case, Size must indicate the number of u16 provided through pTxData. The USART errors are not managed to avoid the overrun error.