76 строки
1,5 КиБ
Go
76 строки
1,5 КиБ
Go
//go:build avr && atmega32u4
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package machine
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import (
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"device/avr"
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"runtime/volatile"
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)
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const (
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// Note: start at port B because there is no port A.
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portB Pin = iota * 8
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portC
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portD
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portE
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portF
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)
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const (
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PB0 = portB + 0
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PB1 = portB + 1 // peripherals: Timer1 channel A
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PB2 = portB + 2 // peripherals: Timer1 channel B
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PB3 = portB + 3 // peripherals: Timer2 channel A
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PB4 = portB + 4
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PB5 = portB + 5
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PB6 = portB + 6
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PB7 = portB + 7
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PC0 = portC + 0
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PC1 = portC + 1
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PC2 = portC + 2
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PC3 = portC + 3
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PC4 = portC + 4
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PC5 = portC + 5
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PC6 = portC + 6
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PC7 = portC + 7
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PD0 = portD + 0
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PD1 = portD + 1
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PD2 = portD + 2
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PD3 = portD + 3
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PD4 = portD + 4
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PD5 = portD + 5
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PD6 = portD + 6
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PD7 = portD + 7
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PE0 = portE + 0
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PE1 = portE + 1
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PE2 = portE + 2
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PE3 = portE + 3
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PE4 = portE + 4
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PE5 = portE + 5
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PE6 = portE + 6
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PE7 = portE + 7
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PF0 = portF + 0
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PF1 = portF + 1
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PF2 = portF + 2
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PF3 = portF + 3
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PF4 = portF + 4
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PF5 = portF + 5
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PF6 = portF + 6
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PF7 = portF + 7
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)
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// getPortMask returns the PORTx register and mask for the pin.
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func (p Pin) getPortMask() (*volatile.Register8, uint8) {
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switch {
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case p >= PB0 && p <= PB7: // port B
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return avr.PORTB, 1 << uint8(p-portB)
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case p >= PC0 && p <= PC7: // port C
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return avr.PORTC, 1 << uint8(p-portC)
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case p >= PD0 && p <= PD7: // port D
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return avr.PORTD, 1 << uint8(p-portD)
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case p >= PE0 && p <= PE7: // port E
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return avr.PORTE, 1 << uint8(p-portE)
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default: // port F
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return avr.PORTF, 1 << uint8(p-portF)
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}
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}
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