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https://github.com/tinygo-org/tinygo.git
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Ayke van Laethem
4397152108
This allows all possible UART pin configurations to be used and avoids some tricky configuration.
134 lines
2.1 KiB
Go
134 lines
2.1 KiB
Go
// +build sam,atsamd21,circuitplay_express
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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 = 0xf01669ef
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// GPIO Pins
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const (
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D0 = PB09
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D1 = PB08
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D2 = PB02
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D3 = PB03
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D4 = PA28
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D5 = PA14
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D6 = PA05
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D7 = PA15
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D8 = PB23
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D9 = PA06
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D10 = PA07
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D11 = NoPin // does not seem to exist
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D12 = PA02
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D13 = PA17 // PWM available
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)
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// Analog Pins
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const (
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A0 = PA02 // PWM available, also ADC/AIN[0]
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A1 = PA05 // ADC/AIN[5]
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A2 = PA06 // PWM available, also ADC/AIN[6]
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A3 = PA07 // PWM available, also ADC/AIN[7]
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A4 = PB03 // PORTB
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A5 = PB02 // PORTB
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A6 = PB09 // PORTB
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A7 = PB08 // PORTB
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A8 = PA11 // ADC/AIN[19]
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A9 = PA09 // ADC/AIN[17]
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A10 = PA04
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)
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const (
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LED = D13
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NEOPIXELS = D8
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BUTTONA = D4
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BUTTONB = D5
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SLIDER = D7 // built-in slide switch
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BUTTON = BUTTONA
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BUTTON1 = BUTTONB
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LIGHTSENSOR = A8
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TEMPSENSOR = A9
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PROXIMITY = A10
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)
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// USBCDC pins (logical UART0)
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const (
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USBCDC_DM_PIN = PA24
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USBCDC_DP_PIN = PA25
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)
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// UART0 pins (logical UART1)
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const (
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UART_TX_PIN = PB08 // PORTB
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UART_RX_PIN = PB09 // PORTB
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)
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// UART1 on the Circuit Playground Express.
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var (
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UART1 = UART{
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Buffer: NewRingBuffer(),
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Bus: sam.SERCOM4_USART,
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SERCOM: 4,
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}
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)
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//go:export SERCOM1_IRQHandler
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func handleUART1() {
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defaultUART1Handler()
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}
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// I2C pins
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const (
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SDA_PIN = PB02 // I2C0 external
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SCL_PIN = PB03 // I2C0 external
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SDA1_PIN = PA00 // I2C1 internal
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SCL1_PIN = PA01 // I2C1 internal
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)
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// I2C on the Circuit Playground Express.
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var (
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// external device
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I2C0 = I2C{
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Bus: sam.SERCOM5_I2CM,
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SERCOM: 5,
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}
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// internal device
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I2C1 = I2C{
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Bus: sam.SERCOM1_I2CM,
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SERCOM: 1,
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}
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)
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// SPI pins (internal flash)
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const (
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SPI0_SCK_PIN = PA21 // SCK: SERCOM3/PAD[3]
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SPI0_MOSI_PIN = PA20 // MOSI: SERCOM3/PAD[2]
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SPI0_MISO_PIN = PA16 // MISO: SERCOM3/PAD[0]
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)
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// SPI on the Circuit Playground Express.
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var (
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SPI0 = SPI{
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Bus: sam.SERCOM3_SPI,
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SERCOM: 3,
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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 = PA10
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I2S_SD_PIN = PA08
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I2S_WS_PIN = NoPin // no WS, instead uses SCK to sync
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)
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// I2S on the Circuit Playground Express.
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var (
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I2S0 = I2S{Bus: sam.I2S}
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)
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