So as I’m learning rust so I wanted to write a wrapper for uart in stm32l0xx-hal
as understand it, the error I keep getting is the USART template in impl is different to struct declaration

the code:

pub struct Uart<USART, TX, RX> {
    _tx: serial::Tx<USART>,
    _rx: serial::Rx<USART>,
    _tx_pin: TX,
    _rx_pin: RX
}

impl<USART: serial::Serial2Ext<TX,RX>, TX, RX> Uart<USART, TX,RX> {
    pub fn new
        (usart: USART,  mut rcc: rcc::Rcc, tx_pin: TX, rx_pin: RX) -> Self {

        let serial = usart
            .usart(tx_pin, rx_pin, serial::Config::default(), &mut rcc)
            .unwrap();

        let (tx, rx) = serial.split();

        Uart{
            _tx : tx, // <- error
            _rx : rx, // <- error
            _tx_pin : tx_pin,
            _rx_pin : rx_pin
        }
    }
}

the error:

error[E0308]: mismatched types
  --> src/uart.rs:28:19
   |
17 | impl<USART: serial::Serial2Ext<TX,RX>, TX, RX> Uart<USART, TX,RX> {
   |      ----- expected this type parameter
...
28 |             _tx : tx,
   |                   ^^ expected `Tx<USART>`, found `Tx<USART2>`
   |
   = note: expected struct `stm32l0xx_hal::serial::Tx<USART>`
              found struct `stm32l0xx_hal::serial::Tx<stm32l0xx_hal::serial::USART2>`

stm32l0xx_hal::serial::USART2 – is the type of usart that I pass to the new function