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//go:build nucleol476rg
// Schematic: https://www.st.com/resource/en/user_manual/um1724-stm32-nucleo64-boards-mb1136-stmicroelectronics.pdf
// Datasheet: https://www.st.com/resource/en/datasheet/stm32l476je.pdf
package machine
import (
"device/stm32"
"runtime/interrupt"
)
const (
// Arduino Pins
A0 = PA0
A1 = PA1
A2 = PA4
A3 = PB0
A4 = PC1
A5 = PC0
D0 = PA3
D1 = PA2
D2 = PA10
D3 = PB3
D4 = PB5
D5 = PB4
D6 = PB10
D7 = PA8
D8 = PA9
D9 = PC7
D10 = PB6
D11 = PA7
D12 = PA6
D13 = PA5
D14 = PB9
D15 = PB8
)
// User LD2: the green LED is a user LED connected to ARDUINO® signal D13 corresponding
// to STM32 I/O PA5 (pin 21) or PB13 (pin 34) depending on the STM32 target.
const (
LED = LED_BUILTIN
LED_BUILTIN = LED_GREEN
LED_GREEN = PA5
)
const (
// This board does not have a user button, so
// use first GPIO pin by default
BUTTON = PA0
)
const (
// UART pins
// PA2 and PA3 are connected to the ST-Link Virtual Com Port (VCP)
UART_TX_PIN = PA2
UART_RX_PIN = PA3
// I2C pins
// With default solder bridge settings:
// PB8 / Arduino D5 / CN3 Pin 8 is SCL
// PB7 / Arduino D4 / CN3 Pin 7 is SDA
I2C0_SCL_PIN = PB8
I2C0_SDA_PIN = PB9
// SPI pins
SPI1_SCK_PIN = PA5
SPI1_SDI_PIN = PA6
SPI1_SDO_PIN = PA7
SPI0_SCK_PIN = SPI1_SCK_PIN
SPI0_SDI_PIN = SPI1_SDI_PIN
SPI0_SDO_PIN = SPI1_SDO_PIN
)
var (
// USART2 is the hardware serial port connected to the onboard ST-LINK
// debugger to be exposed as virtual COM port over USB on Nucleo boards.
UART1 = &_UART1
_UART1 = UART{
Buffer: NewRingBuffer(),
Bus: stm32.USART2,
TxAltFuncSelector: AF7_USART1_2_3,
RxAltFuncSelector: AF7_USART1_2_3,
}
DefaultUART = UART1
// I2C1 is documented, alias to I2C0 as well
I2C1 = &I2C{
Bus: stm32.I2C1,
AltFuncSelector: AF4_I2C1_2_3,
}
I2C0 = I2C1
// SPI1 is documented, alias to SPI0 as well
SPI1 = &SPI{
Bus: stm32.SPI1,
AltFuncSelector: AF5_SPI1_2,
}
SPI0 = SPI1
)
func init() {
UART1.Interrupt = interrupt.New(stm32.IRQ_USART2, _UART1.handleInterrupt)
}
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