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cn
688dd81400
Motivation: The bluepill uses USART1 as UART0 but other boards like the STM32 Nucleo boards (and disco as well) use USART2 for USB COM port. To avoid duplication of code the same pattern as in `machine_atsamd21.go` is applied where only UART-specific code is moved to `board_*.go`.
86 lines
1.4 KiB
Go
86 lines
1.4 KiB
Go
// +build bluepill
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package machine
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import "device/stm32"
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// https://wiki.stm32duino.com/index.php?title=File:Bluepillpinout.gif
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const (
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PA0 = portA + 0
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PA1 = portA + 1
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PA2 = portA + 2
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PA3 = portA + 3
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PA4 = portA + 4
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PA5 = portA + 5
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PA6 = portA + 6
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PA7 = portA + 7
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PA8 = portA + 8
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PA9 = portA + 9
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PA10 = portA + 10
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PA11 = portA + 11
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PA12 = portA + 12
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PA13 = portA + 13
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PA14 = portA + 14
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PA15 = portA + 15
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PB0 = portB + 0
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PB1 = portB + 1
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PB2 = portB + 2
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PB3 = portB + 3
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PB4 = portB + 4
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PB5 = portB + 5
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PB6 = portB + 6
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PB7 = portB + 7
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PB8 = portB + 8
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PB9 = portB + 9
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PB10 = portB + 10
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PB11 = portB + 11
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PB12 = portB + 12
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PB13 = portB + 13
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PB14 = portB + 14
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PB15 = portB + 15
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PC13 = portC + 13
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PC14 = portC + 14
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PC15 = portC + 15
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)
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const (
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LED = PC13
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)
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// UART pins
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const (
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UART_TX_PIN = PA9
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UART_RX_PIN = PA10
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UART_ALT_TX_PIN = PB6
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UART_ALT_RX_PIN = PB7
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)
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var (
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// USART1 is the first hardware serial port on the STM32.
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// Both UART0 and UART1 refer to USART1.
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UART0 = UART{
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Buffer: NewRingBuffer(),
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Bus: stm32.USART1,
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IRQVal: stm32.IRQ_USART1,
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}
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UART1 = &UART0
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)
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//go:export USART1_IRQHandler
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func handleUART1() {
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UART1.Receive(byte((UART1.Bus.DR.Get() & 0xFF)))
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}
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// SPI pins
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const (
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SPI0_SCK_PIN = PA5
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SPI0_MOSI_PIN = PA7
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SPI0_MISO_PIN = PA6
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)
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// I2C pins
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const (
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SDA_PIN = PB7
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SCL_PIN = PB6
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)
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