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.
100 строки
1,5 КиБ
Go
100 строки
1,5 КиБ
Go
// +build itsybitsy_nrf52840
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package machine
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const HasLowFrequencyCrystal = true
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// GPIO Pins
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const (
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D0 = P0_25 // UART TX
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D1 = P0_24 // UART RX
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D2 = P1_02
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D3 = P0_06 // LED1
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D4 = P0_29 // Button
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D5 = P0_27
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D6 = P1_09 // DotStar Clock
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D7 = P1_08
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D8 = P0_08 // DotStar Data
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D9 = P0_07
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D10 = P0_05
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D11 = P0_26
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D12 = P0_11
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D13 = P0_12
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D14 = P0_04 // A0
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D15 = P0_30 // A1
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D16 = P0_28 // A2
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D17 = P0_31 // A3
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D18 = P0_02 // A4
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D19 = P0_03 // A5
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D20 = P0_05 // A6
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D21 = P0_16 // I2C SDA
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D22 = P0_14 // I2C SCL
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D23 = P0_20 // SPI SDI
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D24 = P0_15 // SPI SDO
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D25 = P0_13 // SPI SCK
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D26 = P0_19 // QSPI SCK
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D27 = P0_23 // QSPI CS
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D28 = P0_21 // QSPI Data 0
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D29 = P0_22 // QSPI Data 1
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D30 = P1_00 // QSPI Data 2
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D31 = P0_17 // QSPI Data 3
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)
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// Analog Pins
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const (
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A0 = D14
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A1 = D15
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A2 = D16
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A3 = D17
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A4 = D18
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A5 = D19
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A6 = D20
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)
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const (
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LED = D3
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LED1 = LED
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BUTTON = D4
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QSPI_SCK = D26
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QSPI_CS = D27
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QSPI_DATA0 = D28
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QSPI_DATA1 = D29
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QSPI_DATA2 = D30
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QSPI_DATA3 = D31
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)
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// UART0 pins (logical UART1)
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const (
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UART_RX_PIN = D0
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UART_TX_PIN = D1
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)
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// Serial is the USB device
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var (
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Serial = USB
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)
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// I2C pins
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const (
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SDA_PIN = D21 // I2C0 external
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SCL_PIN = D22 // I2C0 external
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)
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// SPI pins
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const (
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SPI0_SCK_PIN = D25
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SPI0_SDO_PIN = D24
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SPI0_SDI_PIN = D23
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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 nRF52840 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 = 0x8051
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)
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