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// +build sam,atsamd21,itsybitsy_m0
package machine
import (
"device/sam"
)
// used to reset into bootloader
const RESET_MAGIC_VALUE = 0xf01669ef
// GPIO Pins
const (
D0 = PA11 // UART0 RX
D1 = PA10 // UART0 TX
D2 = PA14
D3 = PA09 // PWM available
D4 = PA08 // PWM available
D5 = PA15 // PWM available
D6 = PA20 // PWM available
D7 = PA21 // PWM available
D8 = PA06 // PWM available
D9 = PA07 // PWM available
D10 = PA18 // can be used for PWM or UART1 TX
D11 = PA16 // can be used for PWM or UART1 RX
D12 = PA19 // PWM available
D13 = PA17 // PWM available
)
// Analog pins
const (
A0 = PA02 // ADC/AIN[0]
A1 = PB08 // ADC/AIN[2]
A2 = PB09 // ADC/AIN[3]
A3 = PA04 // ADC/AIN[4]
A4 = PA05 // ADC/AIN[5]
A5 = PB02 // ADC/AIN[10]
)
const (
LED = D13
)
// UART0 aka USBCDC pins
const (
USBCDC_DM_PIN = PA24
USBCDC_DP_PIN = PA25
)
// UART1 pins
const (
UART_TX_PIN = D10
UART_RX_PIN = D11
)
// UART1 on the ItsyBitsy M0.
var (
UART1 = UART{Bus: sam.SERCOM1_USART,
Buffer: NewRingBuffer(),
Mode: PinSERCOM,
IRQVal: sam.IRQ_SERCOM1,
}
)
//go:export SERCOM1_IRQHandler
func handleUART1() {
defaultUART1Handler()
}
// I2C pins
const (
SDA_PIN = PA22 // SDA: SERCOM3/PAD[0]
SCL_PIN = PA23 // SCL: SERCOM3/PAD[1]
)
// I2C on the ItsyBitsy M0.
var (
I2C0 = I2C{
Bus: sam.SERCOM3_I2CM,
SERCOM: 3,
}
)
// SPI pins
const (
SPI0_SCK_PIN = PB11 // SCK: SERCOM4/PAD[3]
SPI0_MOSI_PIN = PB10 // MOSI: SERCOM4/PAD[2]
SPI0_MISO_PIN = PA12 // MISO: SERCOM4/PAD[0]
)
// SPI on the ItsyBitsy M0.
var (
SPI0 = SPI{
Bus: sam.SERCOM4_SPI,
SERCOM: 4,
}
)
// "Internal" SPI pins; SPI flash is attached to these on ItsyBitsy M0
const (
SPI1_CS_PIN = PA27
SPI1_SCK_PIN = PB23
SPI1_MOSI_PIN = PB22
SPI1_MISO_PIN = PB03
)
// "Internal" SPI on Sercom 5
var (
SPI1 = SPI{
Bus: sam.SERCOM5_SPI,
SERCOM: 5,
}
)
// I2S pins
const (
I2S_SCK_PIN = PA10
I2S_SD_PIN = PA08
I2S_WS_PIN = NoPin // TODO: figure out what this is on ItsyBitsy M0.
)
// I2S on the ItsyBitsy M0.
var (
I2S0 = I2S{Bus: sam.I2S}
)
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