Add example gaggia timer on attiny10

avr/attiny10/010_gaggia_example_timer/Makefile

@@ -0,0 +1,32 @@
+# --
+# Copyright (c) 2023, Lukasz Marcin Podkalicki <lpodkalicki@gmail.com>
+# --
+
+MCU=attiny10
+BYTE0=0xFF
+LOCK=0xFF
+F_CPU=8000000
+CC=avr-gcc
+LD=avr-ld
+OBJCOPY=avr-objcopy
+SIZE=avr-size
+AVRDUDE=avrdude
+CFLAGS=-std=c99 -Wall -g -Os -mmcu=${MCU} -DF_CPU=${F_CPU} -I.
+TARGET=main
+
+SRCS = main.c
+
+all:
+	${CC} ${CFLAGS} -o ${TARGET}.o ${SRCS}
+	${LD} -o ${TARGET}.elf ${TARGET}.o -g -mavrtiny
+	${OBJCOPY} -j .text -j .data -O ihex ${TARGET}.o ${TARGET}.hex
+	${SIZE} -C --mcu=${MCU} ${TARGET}.elf
+
+flash:
+	${AVRDUDE} -p ${MCU} -c usbasp -B10 -B10 -U flash:w:${TARGET}.hex:i -F -P usb
+
+fuse:
+	$(AVRDUDE) -p ${MCU} -c usbasp -B10 -U fuse:w:${BYTE0}:m -U lock:w:${LOCK}:m
+
+clean:
+	rm -f *.c~ *.h~ *.o *.elf *.hex

avr/attiny10/010_gaggia_example_timer/main.c

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+/**
+ * Copyright (c) 2023, Łukasz Marcin Podkalicki <lpodkalicki@gmail.com>
+ */
+
+#include <avr/io.h>
+#include <util/delay.h>
+
+#define	IN_PIN			PB0
+#define	OUT_PIN			PB2
+
+#define	TIMER_SECONDS_MAX	(1 * 60)
+
+int
+main(void)
+{
+	uint8_t timer_activated = 1;
+	uint16_t timer_seconds = 0;
+	uint8_t timer_counter = 0;
+
+	/* setup */
+	CCP = 0xD8; // set register signature - 0xD8
+	CLKPSR = 0; // set the clock division factor
+	DDRB |= _BV(OUT_PIN); // set OUT pin as OUTPUT
+	PORTB |= _BV(OUT_PIN); // set OUT_PIN to HIGH at start
+
+
+	/* loop */
+	while (1)
+	{
+		if (PINB & _BV(IN_PIN))
+		{
+			timer_seconds = timer_counter = 0; // reset timer
+                        timer_activated = 1; // activate timer
+                        PORTB |= _BV(OUT_PIN); // set OUT pin as HIGH
+		}
+
+		if (timer_activated)
+		{
+			if (timer_seconds == TIMER_SECONDS_MAX)
+			{
+				timer_activated = 0; // deactivate timer
+				PORTB &= ~_BV(OUT_PIN); // set OUT pin to LOW
+			}
+			else
+			{
+				if (++timer_counter == 10)
+				{
+					timer_counter = 0;
+					timer_seconds++;
+				}
+			}
+		}
+
+		_delay_ms(100);
+	}
+}