Commit 742ed60b authored by Birte Kristina Friesel's avatar Birte Kristina Friesel
Browse files

atmega2560: add stdin driver

parent 0290ca63

include/arch/atmega2560/driver/stdin.h

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/*

 * Copyright 2021 Daniel Friesel

 *

 * SPDX-License-Identifier: BSD-2-Clause

 */

#ifndef STANDARDINPUT_H

#define STANDARDINPUT_H



class StandardInput {

	private:

		StandardInput(const StandardInput &copy);

		static unsigned char const bufsize = 16;

		char buffer[bufsize];

		unsigned char write_pos, read_pos;



	public:

		StandardInput() : write_pos(0), read_pos(0) {}

		void setup();

		bool hasKey();

		char getKey();



		inline void addKey(char key) {

			buffer[write_pos] = key;

			write_pos = (write_pos + 1) % bufsize;

		}

};



extern StandardInput kin;



#endif

src/arch/atmega2560/Kconfig

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@@ -2,7 +2,19 @@ 
#

# SPDX-License-Identifier: CC0-1.0



config arch_atmega2560_driver_dmx

bool "DMX"

select meta_driver_dmx



config arch_atmega2560_driver_i2c

bool "I2C"

select meta_driver_hardware_i2c

select meta_driver_i2c



config arch_atmega2560_driver_stdin

bool "UART Input"

select meta_driver_stdin



config arch_atmega2560_driver_timer

bool "Timer with Interrupts"

select meta_driver_timer

src/arch/atmega2560/Makefile.inc

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@@ -83,6 +83,10 @@ ifdef CONFIG_arch_atmega2560_driver_adc 
	CXX_TARGETS += src/arch/atmega2560/driver/adc.cc

endif



ifdef CONFIG_arch_atmega2560_driver_dmx

	CXX_TARGETS += src/arch/atmega2560/driver/dmx.cc

endif



ifdef CONFIG_arch_atmega2560_driver_spi

	CXX_TARGETS += src/arch/atmega2560/driver/spi.cc

endif

src/arch/atmega2560/driver/stdin.cc

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/*

 * Copyright 2020 Daniel Friesel

 *

 * SPDX-License-Identifier: BSD-2-Clause

 */

#include "driver/stdin.h"

#include <avr/io.h>

#include <avr/interrupt.h>



void StandardInput::setup()

{

	UCSR0B |= _BV(RXCIE0);

}



bool StandardInput::hasKey()

{

	if (write_pos != read_pos) {

		return true;

	}

	return false;

}



char StandardInput::getKey()

{

	char ret = buffer[read_pos++];

	read_pos %= bufsize;

	return ret;

}



StandardInput kin;



ISR(USART0_RX_vect)

{

	kin.addKey(UDR0);

}