96e863f0f3
This can be very useful for some purposes:
* It makes it possible to disable the UART in cases where it is not
needed or needs to be disabled to conserve power.
* It makes it possible to disable the serial output to reduce code
size, which may be important for some chips. Sometimes, a few kB can
be saved this way.
* It makes it possible to override the default, for example you might
want to use an actual UART to debug the USB-CDC implementation.
It also lowers the dependency on having machine.Serial defined, which is
often not defined when targeting a chip. Eventually, we might want to
make it possible to write `-target=nrf52` or `-target=atmega328p` for
example to target the chip itself with no board specific assumptions.
The defaults don't change. I checked this by running `make smoketest`
before and after and comparing the results.
78 строки
1,2 КиБ
Go
78 строки
1,2 КиБ
Go
// +build microbit
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package machine
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// The micro:bit does not have a 32kHz crystal on board.
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const HasLowFrequencyCrystal = false
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// Buttons on the micro:bit (A and B)
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const (
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BUTTON Pin = BUTTONA
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BUTTONA Pin = 17
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BUTTONB Pin = 26
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)
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var DefaultUART = UART0
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// UART pins
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const (
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UART_TX_PIN Pin = 24
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UART_RX_PIN Pin = 25
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)
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// ADC pins
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const (
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ADC0 Pin = 3 // P0 on the board
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ADC1 Pin = 2 // P1 on the board
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ADC2 Pin = 1 // P2 on the board
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)
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// I2C pins
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const (
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SDA_PIN Pin = 30 // P20 on the board
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SCL_PIN Pin = 0 // P19 on the board
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)
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// SPI pins
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const (
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SPI0_SCK_PIN Pin = 23 // P13 on the board
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SPI0_SDO_PIN Pin = 21 // P15 on the board
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SPI0_SDI_PIN Pin = 22 // P14 on the board
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)
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// GPIO/Analog pins
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const (
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P0 Pin = 3
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P1 Pin = 2
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P2 Pin = 1
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P3 Pin = 4
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P4 Pin = 5
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P5 Pin = 17
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P6 Pin = 12
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P7 Pin = 11
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P8 Pin = 18
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P9 Pin = 10
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P10 Pin = 6
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P11 Pin = 26
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P12 Pin = 20
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P13 Pin = 23
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P14 Pin = 22
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P15 Pin = 21
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P16 Pin = 16
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)
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// LED matrix pins
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const (
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LED_COL_1 Pin = 4
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LED_COL_2 Pin = 5
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LED_COL_3 Pin = 6
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LED_COL_4 Pin = 7
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LED_COL_5 Pin = 8
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LED_COL_6 Pin = 9
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LED_COL_7 Pin = 10
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LED_COL_8 Pin = 11
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LED_COL_9 Pin = 12
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LED_ROW_1 Pin = 13
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LED_ROW_2 Pin = 14
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LED_ROW_3 Pin = 15
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)
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