mirror of
https://github.com/tinygo-org/tinygo.git
synced 2026-08-03 02:27:48 +00:00
Ayke van Laethem
116 lines
2.7 KiB
Go
116 lines
2.7 KiB
Go
// +build nrf51,microbit
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package machine
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import (
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"device/nrf"
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"errors"
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)
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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 = BUTTONA
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BUTTONA = 17
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BUTTONB = 26
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)
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// UART pins
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const (
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UART_TX_PIN = 24
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UART_RX_PIN = 25
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)
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// ADC pins
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const (
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ADC0 = 3 // P0 on the board
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ADC1 = 2 // P1 on the board
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ADC2 = 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 = 30 // P20 on the board
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SCL_PIN = 0 // P19 on the board
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)
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// LED matrix pins
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const (
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LED_COL_1 = 4
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LED_COL_2 = 5
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LED_COL_3 = 6
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LED_COL_4 = 7
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LED_COL_5 = 8
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LED_COL_6 = 9
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LED_COL_7 = 10
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LED_COL_8 = 11
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LED_COL_9 = 12
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LED_ROW_1 = 13
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LED_ROW_2 = 14
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LED_ROW_3 = 15
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)
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// matrixSettings has the legs of the LED grid in the form {row, column} for each LED position.
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var matrixSettings = [5][5][2]uint8{
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{{LED_ROW_1, LED_COL_1}, {LED_ROW_2, LED_COL_4}, {LED_ROW_1, LED_COL_2}, {LED_ROW_2, LED_COL_5}, {LED_ROW_1, LED_COL_3}},
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{{LED_ROW_3, LED_COL_4}, {LED_ROW_3, LED_COL_5}, {LED_ROW_3, LED_COL_6}, {LED_ROW_3, LED_COL_7}, {LED_ROW_3, LED_COL_8}},
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{{LED_ROW_2, LED_COL_2}, {LED_ROW_1, LED_COL_9}, {LED_ROW_2, LED_COL_3}, {LED_ROW_3, LED_COL_9}, {LED_ROW_2, LED_COL_1}},
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{{LED_ROW_1, LED_COL_8}, {LED_ROW_1, LED_COL_7}, {LED_ROW_1, LED_COL_6}, {LED_ROW_1, LED_COL_5}, {LED_ROW_1, LED_COL_4}},
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{{LED_ROW_3, LED_COL_3}, {LED_ROW_2, LED_COL_7}, {LED_ROW_3, LED_COL_1}, {LED_ROW_2, LED_COL_6}, {LED_ROW_3, LED_COL_2}}}
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// InitLEDMatrix initializes the LED matrix, by setting all of the row/col pins to output
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// then calling ClearLEDMatrix.
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func InitLEDMatrix() {
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set := 0
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for i := LED_COL_1; i <= LED_ROW_3; i++ {
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set |= 1 << uint8(i)
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}
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nrf.GPIO.DIRSET = nrf.RegValue(set)
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ClearLEDMatrix()
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}
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// ClearLEDMatrix clears the entire LED matrix.
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func ClearLEDMatrix() {
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set := 0
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for i := LED_COL_1; i <= LED_COL_9; i++ {
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set |= 1 << uint8(i)
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}
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nrf.GPIO.OUTSET = nrf.RegValue(set)
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nrf.GPIO.OUTCLR = (1 << LED_ROW_1) | (1 << LED_ROW_2) | (1 << LED_ROW_3)
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}
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// SetLEDMatrix turns on a single LED on the LED matrix.
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// Currently limited to a single LED at a time, it will clear the matrix before setting it.
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func SetLEDMatrix(x, y uint8) error {
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if x > 4 || y > 4 {
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return errors.New("Invalid LED matrix row or column")
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}
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// Clear matrix
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ClearLEDMatrix()
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nrf.GPIO.OUTSET = (1 << matrixSettings[y][x][0])
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nrf.GPIO.OUTCLR = (1 << matrixSettings[y][x][1])
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return nil
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}
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// SetEntireLEDMatrixOn turns on all of the LEDs on the LED matrix.
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func SetEntireLEDMatrixOn() error {
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set := 0
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for i := LED_ROW_1; i <= LED_ROW_3; i++ {
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set |= 1 << uint8(i)
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}
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nrf.GPIO.OUTSET = nrf.RegValue(set)
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set = 0
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for i := LED_COL_1; i <= LED_COL_9; i++ {
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set |= 1 << uint8(i)
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}
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nrf.GPIO.OUTCLR = nrf.RegValue(set)
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return nil
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}
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