lgt92: update to new UART structure

src/machine/board_lgt92.go

@@ -56,14 +56,16 @@ var (
 	UART0 = UART{
 		Buffer:            NewRingBuffer(),
 		Bus:               stm32.LPUART1,
-		AltFuncSelector: 6,
+		TxAltFuncSelector: 6,
+		RxAltFuncSelector: 6,
 	}
 
 	// Gps UART
 	UART1 = UART{
 		Buffer:            NewRingBuffer(),
 		Bus:               stm32.USART1,
-		AltFuncSelector: 0,
+		TxAltFuncSelector: 0,
+		RxAltFuncSelector: 0,
 	}
 
 	// SPI

src/machine/machine_stm32l0.go

@@ -191,8 +191,8 @@ func enableAltFuncClock(bus unsafe.Pointer) {
 // Configure the UART.
 func (uart UART) configurePins(config UARTConfig) {
 	// enable the alternate functions on the TX and RX pins
-	config.TX.ConfigureAltFunc(PinConfig{Mode: PinModeUARTTX}, uart.AltFuncSelector)
-	config.RX.ConfigureAltFunc(PinConfig{Mode: PinModeUARTRX}, uart.AltFuncSelector)
+	config.TX.ConfigureAltFunc(PinConfig{Mode: PinModeUARTTX}, uart.TxAltFuncSelector)
+	config.RX.ConfigureAltFunc(PinConfig{Mode: PinModeUARTRX}, uart.RxAltFuncSelector)
 }
 
 // UART baudrate calc based on the bus and clockspeed