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