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.
106 строки
1,4 КиБ
Go
106 строки
1,4 КиБ
Go
// +build sam,atsamd21,trinket_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 = PA08 // PWM available
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D1 = PA02
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D2 = PA09 // PWM available
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D3 = PA07 // PWM available / UART0 RX
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D4 = PA06 // PWM available / UART0 TX
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D13 = PA10 // LED
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)
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// Analog pins
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const (
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A0 = D1
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A1 = D2
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A2 = D0
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A3 = D3
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A4 = D4
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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 = D4
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UART_RX_PIN = D3
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)
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// UART1 on the Trinket M0.
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var (
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UART1 = UART{
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Buffer: NewRingBuffer(),
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Bus: sam.SERCOM0_USART,
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SERCOM: 0,
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}
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)
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func init() {
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UART1.Interrupt = interrupt.New(sam.IRQ_SERCOM0, UART1.handleInterrupt)
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}
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// SPI pins
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const (
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SPI0_SCK_PIN = D3
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SPI0_SDO_PIN = D4
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SPI0_SDI_PIN = D2
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)
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// SPI on the Trinket M0.
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var (
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SPI0 = SPI{
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Bus: sam.SERCOM0_SPI,
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SERCOM: 0,
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}
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)
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// I2C pins
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const (
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SDA_PIN = D0 // SDA
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SCL_PIN = D2 // SCL
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)
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// I2C on the Trinket M0.
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var (
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I2C0 = &I2C{
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Bus: sam.SERCOM2_I2CM,
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SERCOM: 2,
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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 Trinket M0.
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)
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// USB CDC identifiers
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const (
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usb_STRING_PRODUCT = "Adafruit Trinket M0"
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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 = 0x801E
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)
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