4397152108
This allows all possible UART pin configurations to be used and avoids some tricky configuration.
144 строки
2,6 КиБ
Go
144 строки
2,6 КиБ
Go
// +build sam,atsamd21,arduino_nano33
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// This contains the pin mappings for the Arduino Nano33 IoT board.
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//
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// For more information, see: https://store.arduino.cc/nano-33-iot
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//
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package machine
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import "device/sam"
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// used to reset into bootloader
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const RESET_MAGIC_VALUE = 0x07738135
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// GPIO Pins
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const (
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RX0 Pin = PB23 // UART2 RX
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TX1 Pin = PB22 // UART2 TX
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D2 Pin = PB10 // PWM available
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D3 Pin = PB11 // PWM available
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D4 Pin = PA07
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D5 Pin = PA05 // PWM available
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D6 Pin = PA04 // PWM available
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D7 Pin = PA06
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D8 Pin = PA18
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D9 Pin = PA20 // PWM available
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D10 Pin = PA21 // PWM available
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D11 Pin = PA16 // PWM available
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D12 Pin = PA19 // PWM available
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D13 Pin = PA17
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)
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// Analog pins
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const (
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A0 Pin = PA02 // ADC/AIN[0]
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A1 Pin = PB02 // ADC/AIN[10]
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A2 Pin = PA11 // ADC/AIN[19]
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A3 Pin = PA10 // ADC/AIN[18],
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A4 Pin = PB08 // ADC/AIN[2], SCL: SERCOM2/PAD[1]
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A5 Pin = PB09 // ADC/AIN[3], SDA: SERCOM2/PAD[1]
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A6 Pin = PA09 // ADC/AIN[17]
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A7 Pin = PB03 // ADC/AIN[11]
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)
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const (
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LED = D13
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)
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// NINA-W102 Pins
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const (
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NINA_MOSI Pin = PA12
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NINA_MISO Pin = PA13
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NINA_CS Pin = PA14
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NINA_SCK Pin = PA15
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NINA_GPIO0 Pin = PA27
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NINA_RESETN Pin = PA08
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NINA_ACK Pin = PA28
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)
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// UART0 aka USBCDC pins
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const (
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USBCDC_DM_PIN Pin = PA24
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USBCDC_DP_PIN Pin = PA25
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)
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// UART1 on the Arduino Nano 33 connects to the onboard NINA-W102 WiFi chip.
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var (
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UART1 = UART{
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Buffer: NewRingBuffer(),
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Bus: sam.SERCOM5_USART,
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SERCOM: 5,
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}
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)
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// UART1 pins
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const (
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UART_TX_PIN Pin = PA22
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UART_RX_PIN Pin = PA23
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)
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//go:export SERCOM5_IRQHandler
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func handleUART1() {
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defaultUART1Handler()
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}
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// UART2 on the Arduino Nano 33 connects to the normal TX/RX pins.
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var (
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UART2 = UART{
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Buffer: NewRingBuffer(),
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Bus: sam.SERCOM3_USART,
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SERCOM: 3,
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}
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)
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//go:export SERCOM3_IRQHandler
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func handleUART2() {
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// should reset IRQ
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UART2.Receive(byte((UART2.Bus.DATA.Get() & 0xFF)))
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UART2.Bus.INTFLAG.SetBits(sam.SERCOM_USART_INTFLAG_RXC)
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}
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// I2C pins
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const (
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SDA_PIN Pin = A4 // SDA: SERCOM4/PAD[1]
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SCL_PIN Pin = A5 // SCL: SERCOM4/PAD[1]
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)
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// I2C on the Arduino Nano 33.
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var (
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I2C0 = I2C{
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Bus: sam.SERCOM4_I2CM,
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SERCOM: 4,
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}
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)
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// SPI pins
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const (
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SPI0_SCK_PIN Pin = A2 // SCK: SERCOM0/PAD[3]
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SPI0_MOSI_PIN Pin = A3 // MOSI: SERCOM0/PAD[2]
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SPI0_MISO_PIN Pin = A6 // MISO: SERCOM0/PAD[1]
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)
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// SPI on the Arduino Nano 33.
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var (
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SPI0 = SPI{
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Bus: sam.SERCOM0_SPI,
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SERCOM: 0,
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}
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)
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// I2S pins
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const (
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I2S_SCK_PIN Pin = PA10
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I2S_SD_PIN Pin = PA08
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I2S_WS_PIN = NoPin // TODO: figure out what this is on Arduino Nano 33.
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)
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// I2S on the Arduino Nano 33.
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var (
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I2S0 = I2S{Bus: sam.I2S}
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)
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