90b42799a2
This makes it possible to assign I2C objects (machine.I2C0, machine.I2C1, etc.) without needing to take a pointer. This is important especially in the future when I2C may be driven using DMA and the machine.I2C type needs to store some state.
46 строки
1,2 КиБ
Go
46 строки
1,2 КиБ
Go
// +build stm32l4x2
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package machine
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// Peripheral abstraction layer for the stm32l4x2
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import (
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"device/stm32"
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)
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func CPUFrequency() uint32 {
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return 80000000
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}
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//---------- UART related code
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// Configure the UART.
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func (uart *UART) configurePins(config UARTConfig) {
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// enable the alternate functions on the TX and RX pins
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config.TX.ConfigureAltFunc(PinConfig{Mode: PinModeUARTTX}, uart.TxAltFuncSelector)
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config.RX.ConfigureAltFunc(PinConfig{Mode: PinModeUARTRX}, uart.RxAltFuncSelector)
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}
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// UART baudrate calc based on the bus and clockspeed
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// NOTE: keep this in sync with the runtime/runtime_stm32l5x2.go clock init code
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func (uart *UART) getBaudRateDivisor(baudRate uint32) uint32 {
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return (CPUFrequency() / baudRate)
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}
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// Register names vary by ST processor, these are for STM L5
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func (uart *UART) setRegisters() {
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uart.rxReg = &uart.Bus.RDR
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uart.txReg = &uart.Bus.TDR
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uart.statusReg = &uart.Bus.ISR
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uart.txEmptyFlag = stm32.USART_ISR_TXE
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}
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//---------- I2C related code
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// Gets the value for TIMINGR register
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func (i2c *I2C) getFreqRange() uint32 {
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// This is a 'magic' value calculated by STM32CubeMX
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// for 80MHz PCLK1.
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// TODO: Do calculations based on PCLK1
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return 0x10909CEC
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}
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