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https://github.com/tinygo-org/tinygo.git
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Ayke van Laethem
90b42799a2
This makes it possible to assign I2C objects (machine.I2C0, machine.I2C1, etc.) without needing to take a pointer. This is important especially in the future when I2C may be driven using DMA and the machine.I2C type needs to store some state.
137 lines
2.2 KiB
Go
137 lines
2.2 KiB
Go
// +build sam,atsamd21,itsybitsy_m0
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package machine
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import (
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"device/sam"
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"runtime/interrupt"
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)
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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 = PA11 // UART0 RX
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D1 = PA10 // UART0 TX
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D2 = PA14
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D3 = PA09 // PWM available
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D4 = PA08 // PWM available
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D5 = PA15 // PWM available
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D6 = PA20 // PWM available
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D7 = PA21 // PWM available
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D8 = PA06 // PWM available
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D9 = PA07 // PWM available
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D10 = PA18 // can be used for PWM or UART1 TX
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D11 = PA16 // can be used for PWM or UART1 RX
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D12 = PA19 // PWM available
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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 // ADC/AIN[0]
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A1 = PB08 // ADC/AIN[2]
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A2 = PB09 // ADC/AIN[3]
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A3 = PA04 // ADC/AIN[4]
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A4 = PA05 // ADC/AIN[5]
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A5 = PB02 // ADC/AIN[10]
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)
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const (
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LED = D13
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)
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// UART0 aka USBCDC pins
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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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// UART1 pins
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const (
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UART_TX_PIN = D10
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UART_RX_PIN = D11
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)
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// UART1 on the ItsyBitsy M0.
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var (
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UART1 = UART{
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Buffer: NewRingBuffer(),
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Bus: sam.SERCOM1_USART,
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SERCOM: 1,
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}
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)
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func init() {
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UART1.Interrupt = interrupt.New(sam.IRQ_SERCOM1, UART1.handleInterrupt)
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}
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// I2C pins
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const (
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SDA_PIN = PA22 // SDA: SERCOM3/PAD[0]
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SCL_PIN = PA23 // SCL: SERCOM3/PAD[1]
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)
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// I2C on the ItsyBitsy M0.
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var (
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I2C0 = &I2C{
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Bus: sam.SERCOM3_I2CM,
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SERCOM: 3,
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}
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)
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// SPI pins
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const (
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SPI0_SCK_PIN = PB11 // SCK: SERCOM4/PAD[3]
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SPI0_SDO_PIN = PB10 // SDO: SERCOM4/PAD[2]
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SPI0_SDI_PIN = PA12 // SDI: SERCOM4/PAD[0]
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)
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// SPI on the ItsyBitsy M0.
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var (
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SPI0 = SPI{
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Bus: sam.SERCOM4_SPI,
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SERCOM: 4,
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}
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)
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// "Internal" SPI pins; SPI flash is attached to these on ItsyBitsy M0
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const (
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SPI1_CS_PIN = PA27
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SPI1_SCK_PIN = PB23
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SPI1_SDO_PIN = PB22
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SPI1_SDI_PIN = PB03
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)
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// "Internal" SPI on Sercom 5
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var (
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SPI1 = SPI{
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Bus: sam.SERCOM5_SPI,
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SERCOM: 5,
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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 // TODO: figure out what this is on ItsyBitsy M0.
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)
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// I2S on the ItsyBitsy M0.
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var (
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I2S0 = I2S{Bus: sam.I2S}
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)
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// USB CDC identifiers
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const (
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usb_STRING_PRODUCT = "Adafruit ItsyBitsy M0 Express"
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usb_STRING_MANUFACTURER = "Adafruit"
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)
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var (
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usb_VID uint16 = 0x239A
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usb_PID uint16 = 0x800F
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)
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