stm32: add blues wireless swan

src/machine/machine_stm32l4x2.go

@@ -1,13 +1,10 @@
+//go:build stm32l4x2
 // +build stm32l4x2
 
 package machine
 
 // Peripheral abstraction layer for the stm32l4x2
 
-import (
-	"device/stm32"
-)
-
 func CPUFrequency() uint32 {
 	return 80000000
 }
@@ -18,29 +15,6 @@ func CPUFrequency() uint32 {
 const APB1_TIM_FREQ = 80e6 // 80MHz
 const APB2_TIM_FREQ = 80e6 // 80MHz
 
-//---------- UART related code
-
-// 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.TxAltFuncSelector)
-	config.RX.ConfigureAltFunc(PinConfig{Mode: PinModeUARTRX}, uart.RxAltFuncSelector)
-}
-
-// UART baudrate calc based on the bus and clockspeed
-// NOTE: keep this in sync with the runtime/runtime_stm32l5x2.go clock init code
-func (uart *UART) getBaudRateDivisor(baudRate uint32) uint32 {
-	return (CPUFrequency() / baudRate)
-}
-
-// Register names vary by ST processor, these are for STM L5
-func (uart *UART) setRegisters() {
-	uart.rxReg = &uart.Bus.RDR
-	uart.txReg = &uart.Bus.TDR
-	uart.statusReg = &uart.Bus.ISR
-	uart.txEmptyFlag = stm32.USART_ISR_TXE
-}
-
 //---------- I2C related code
 
 // Gets the value for TIMINGR register