mirror of
https://github.com/tinygo-org/tinygo.git
synced 2026-08-09 21:43:40 +00:00
Ayke van Laethem
b67351babe
Previously, the machine.UART0 object had two meanings:
- it was the first UART on the chip
- it was the default output for println
These two meanings conflict, and resulted in workarounds like:
- Defining UART0 to refer to the USB-CDC interface (atsamd21,
atsamd51, nrf52840), even though that clearly isn't an UART.
- Defining NRF_UART0 to avoid a conflict with UART0 (which was
redefined as a USB-CDC interface).
- Defining aliases like UART0 = UART1, which refer to the same
hardware peripheral (stm32).
This commit changes this to use a new machine.Serial object for the
default serial port. It might refer to the first or second UART
depending on the board, or even to the USB-CDC interface. Also, UART0
now really refers to the first UART on the chip, no longer to a USB-CDC
interface.
The changes in the runtime package are all just search+replace. The
changes in the machine package are a mixture of search+replace and
manual modifications.
This commit does not affect binary size, in fact it doesn't affect the
resulting binary at all.
104 lines
1.9 KiB
Go
104 lines
1.9 KiB
Go
// +build sam,atsamd21,arduino_zero
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package machine
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// used to reset into bootloader
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const RESET_MAGIC_VALUE = 0x07738135
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// GPIO Pins - Digital Low
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const (
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D0 = PA11 // RX
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D1 = PA10 // 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
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)
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// GPIO Pins - Digital High
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const (
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D8 = PA06 // PWM available
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D9 = PA07 // PWM available
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D10 = PA18 // PWM available
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D11 = PA16 // PWM available
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D12 = PA19 // PWM available
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D13 = PA17 // PWM available
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)
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// LEDs on the Arduino Zero
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const (
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LED = LED1
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LED1 Pin = D13
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LED2 Pin = PA27 // TX LED
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LED3 Pin = PB03 // RX LED
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)
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var Serial = USB
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// ADC pins
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const (
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AREF Pin = PA03
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ADC0 Pin = PA02
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ADC1 Pin = PB08
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ADC2 Pin = PB09
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ADC3 Pin = PA04
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ADC4 Pin = PA05
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ADC5 Pin = PB02
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)
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// SPI pins - EDBG connected
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const (
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SPI0_SDO_PIN Pin = PA16 // MOSI: SERCOM1/PAD[0]
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SPI0_SDI_PIN Pin = PA19 // MISO: SERCOM1/PAD[2]
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SPI0_SCK_PIN Pin = PA17 // SCK: SERCOM1/PAD[3]
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)
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// SPI pins (Legacy ICSP)
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const (
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SPI1_SDO_PIN Pin = PB10 // MOSI: SERCOM4/PAD[2] - Pin 4
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SPI1_SDI_PIN Pin = PA12 // MISO: SERCOM4/PAD[0] - Pin 1
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SPI1_SCK_PIN Pin = PB11 // SCK: SERCOM4/PAD[3] - Pin 3
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)
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// I2C pins - EDBG connected
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const (
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SDA_PIN Pin = PA22 // SDA: SERCOM3/PAD[0] - Pin 20
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SCL_PIN Pin = PA23 // SCL: SERCOM3/PAD[1] - Pin 21
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)
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// I2S pins - might not be exposed
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const (
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I2S_SCK_PIN Pin = PA10
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I2S_SD_PIN Pin = PA07
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I2S_WS_PIN Pin = PA11
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)
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// UART0 pins - EDBG connected
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const (
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UART_RX_PIN Pin = D0
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UART_TX_PIN Pin = D1
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)
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// 'native' USB port pins
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const (
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USBCDC_DM_PIN Pin = PA24
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USBCDC_DP_PIN Pin = PA25
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)
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// USB CDC identifiers
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const (
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usb_STRING_PRODUCT = "Arduino Zero"
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usb_STRING_MANUFACTURER = "Arduino LLC"
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usb_VID uint16 = 0x2341
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usb_PID uint16 = 0x804d
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)
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// 32.768 KHz Crystal
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const (
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XIN32 Pin = PA00
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XOUT32 Pin = PA01
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)
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