//go:build itsybitsy_m4

package machine

// used to reset into bootloader
const resetMagicValue = 0xf01669ef

// GPIO Pins
const (
	D0  = PA16 // UART0 RX/PWM available
	D1  = PA17 // UART0 TX/PWM available
	D2  = PA07
	D3  = PB22
	D4  = PA14 // PWM available
	D5  = PA15 // PWM available
	D6  = PB02 // dotStar clock
	D7  = PA18 // PWM available
	D8  = PB03 // dotStar data
	D9  = PA19 // PWM available
	D10 = PA20 // can be used for PWM or UART1 TX
	D11 = PA21 // can be used for PWM or UART1 RX
	D12 = PA23 // PWM available
	D13 = PA22 // PWM available
)

// Analog pins
const (
	A0 = PA02 // ADC/AIN[0]
	A1 = PA05 // ADC/AIN[2]
	A2 = PB08 // ADC/AIN[3]
	A3 = PB09 // ADC/AIN[4]
	A4 = PA04 // ADC/AIN[5]
	A5 = PA06 // ADC/AIN[10]
)

const (
	LED = D13
)

// USBCDC pins
const (
	USBCDC_DM_PIN = PA24
	USBCDC_DP_PIN = PA25
)

// UART1 pins
const (
	UART_TX_PIN = D1
	UART_RX_PIN = D0
)

const (
	UART2_TX_PIN = A4
	UART2_RX_PIN = D2
)

var (
	UART1 = &sercomUSART3
	UART2 = &sercomUSART0

	DefaultUART = UART1
)

// I2C pins
const (
	SDA_PIN = PA12 // SDA: SERCOM2/PAD[0]
	SCL_PIN = PA13 // SCL: SERCOM2/PAD[1]
)

// I2C on the ItsyBitsy M4.
var (
	I2C0 = sercomI2CM2
)

// SPI pins
const (
	SPI0_SCK_PIN = PA01 // SCK: SERCOM1/PAD[1]
	SPI0_SDO_PIN = PA00 // SDO: SERCOM1/PAD[0]
	SPI0_SDI_PIN = PB23 // SDI: SERCOM1/PAD[3]
)

// SPI on the ItsyBitsy M4.
var SPI0 = sercomSPIM1

// USB CDC identifiers
const (
	usb_STRING_PRODUCT      = "Adafruit ItsyBitsy M4"
	usb_STRING_MANUFACTURER = "Adafruit"
)

var (
	usb_VID uint16 = 0x239A
	usb_PID uint16 = 0x802B
)