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// +build sam,atsamd21,circuitplay_express
package machine
import "device/sam"
// used to reset into bootloader
const RESET_MAGIC_VALUE = 0xf01669ef
// GPIO Pins
const (
D0 = PB09
D1 = PB08
D2 = PB02
D3 = PB03
D4 = PA28
D5 = PA14
D6 = PA05
D7 = PA15
D8 = PB23
D9 = PA06
D10 = PA07
D11 = NoPin // does not seem to exist
D12 = PA02
D13 = PA17 // PWM available
)
// Analog Pins
const (
A0 = PA02 // PWM available, also ADC/AIN[0]
A1 = PA05 // ADC/AIN[5]
A2 = PA06 // PWM available, also ADC/AIN[6]
A3 = PA07 // PWM available, also ADC/AIN[7]
A4 = PB03 // PORTB
A5 = PB02 // PORTB
A6 = PB09 // PORTB
A7 = PB08 // PORTB
A8 = PA11 // ADC/AIN[19]
A9 = PA09 // ADC/AIN[17]
A10 = PA04
)
const (
LED = D13
NEOPIXELS = D8
BUTTONA = D4
BUTTONB = D5
SLIDER = D7 // built-in slide switch
BUTTON = BUTTONA
BUTTON1 = BUTTONB
LIGHTSENSOR = A8
TEMPSENSOR = A9
PROXIMITY = A10
)
// USBCDC pins (logical UART0)
const (
USBCDC_DM_PIN = PA24
USBCDC_DP_PIN = PA25
)
// UART0 pins (logical UART1)
const (
UART_TX_PIN = PB08 // PORTB
UART_RX_PIN = PB09 // PORTB
)
// UART1 on the Circuit Playground Express.
var (
UART1 = UART{
Buffer: NewRingBuffer(),
Bus: sam.SERCOM4_USART,
SERCOM: 4,
}
)
//go:export SERCOM1_IRQHandler
func handleUART1() {
defaultUART1Handler()
}
// I2C pins
const (
SDA_PIN = PB02 // I2C0 external
SCL_PIN = PB03 // I2C0 external
SDA1_PIN = PA00 // I2C1 internal
SCL1_PIN = PA01 // I2C1 internal
)
// I2C on the Circuit Playground Express.
var (
// external device
I2C0 = I2C{
Bus: sam.SERCOM5_I2CM,
SERCOM: 5,
}
// internal device
I2C1 = I2C{
Bus: sam.SERCOM1_I2CM,
SERCOM: 1,
}
)
// SPI pins (internal flash)
const (
SPI0_SCK_PIN = PA21 // SCK: SERCOM3/PAD[3]
SPI0_MOSI_PIN = PA20 // MOSI: SERCOM3/PAD[2]
SPI0_MISO_PIN = PA16 // MISO: SERCOM3/PAD[0]
)
// SPI on the Circuit Playground Express.
var (
SPI0 = SPI{
Bus: sam.SERCOM3_SPI,
SERCOM: 3,
}
)
// I2S pins
const (
I2S_SCK_PIN = PA10
I2S_SD_PIN = PA08
I2S_WS_PIN = NoPin // no WS, instead uses SCK to sync
)
// I2S on the Circuit Playground Express.
var (
I2S0 = I2S{Bus: sam.I2S}
)
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