4f4d7976c6
* machine/uart: add core support for multiple UARTs by allowing for multiple RingBuffers * machine/uart: complete core support for multiple UARTs * machine/uart: no need to store pointer to UART, better to treat like I2C and SPI * machine/uart: increase ring buffer size to 128 bytes * machine/uart: improve godocs comments and use comma-ok idiom for buffer Put/Get methods
49 строки
1,1 КиБ
Go
49 строки
1,1 КиБ
Go
// +build avr,attiny
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package machine
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import (
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"device/avr"
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)
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// Configure sets the pin to input or output.
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func (p GPIO) Configure(config GPIOConfig) {
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if config.Mode == GPIO_OUTPUT { // set output bit
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*avr.DDRB |= 1 << p.Pin
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} else { // configure input: clear output bit
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*avr.DDRB &^= 1 << p.Pin
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}
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}
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func (p GPIO) getPortMask() (*avr.RegValue, uint8) {
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return avr.PORTB, 1 << p.Pin
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}
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// Get returns the current value of a GPIO pin.
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func (p GPIO) Get() bool {
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val := *avr.PINB & (1 << p.Pin)
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return (val > 0)
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}
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// UART on the AVR is a dummy implementation. UART has not been implemented for ATtiny
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// devices.
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type UART struct {
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Buffer *RingBuffer
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}
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// Configure is a dummy implementation. UART has not been implemented for ATtiny
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// devices.
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func (uart UART) Configure(config UARTConfig) {
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}
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// WriteByte is a dummy implementation. UART has not been implemented for ATtiny
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// devices.
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func (uart UART) WriteByte(c byte) error {
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return nil
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}
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// Tx is a dummy implementation. I2C has not been implemented for ATtiny
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// devices.
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func (i2c I2C) Tx(addr uint16, w, r []byte) error {
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return nil
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}
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