From ecc4e90c3b33179d8eeefdbbb3c083893d3a1c5c Mon Sep 17 00:00:00 2001
From: vg <vgm+dev@devys.org>
Date: Fri, 1 Jul 2022 22:44:55 +0200
Subject: new program to wakeup ampli with timer

---
 avr-attiny25-ampli-wakeup-delay/Makefile | 41 ++++++++++++++++++++++++++++++++
 avr-attiny25-ampli-wakeup-delay/main.c   | 23 ++++++++++++++++++
 2 files changed, 64 insertions(+)
 create mode 100644 avr-attiny25-ampli-wakeup-delay/Makefile
 create mode 100644 avr-attiny25-ampli-wakeup-delay/main.c

diff --git a/avr-attiny25-ampli-wakeup-delay/Makefile b/avr-attiny25-ampli-wakeup-delay/Makefile
new file mode 100644
index 0000000..14bc95e
--- /dev/null
+++ b/avr-attiny25-ampli-wakeup-delay/Makefile
@@ -0,0 +1,41 @@
+# settings for arduino uno
+DEVICE     = attiny25
+CLOCK      = 1000000
+
+# buspirate programmer
+PORT=/dev/serial/by-id/usb-FTDI_FT232R_USB_UART_A400XJSH-if00-port0
+AVRDUDE=avrdude -p $(DEVICE) -c buspirate -P $(PORT)
+
+DEFS    = -DF_CPU=$(CLOCK)UL
+LIBS    = -Wl,--relax,--gc-sections,--print-gc-sections,--entry=main
+LIBS = -Wl,--entry=main,--gc-sections,--rela
+CFLAGS  = -Wall -Werror -pedantic
+#-std=c99 // default should be gnu99 nowaday, no need to specify c99
+CFLAGS += -Os -funsigned-bitfields -fpack-struct -fshort-enums
+CFLAGS += -mmcu=$(DEVICE) $(DEFS)
+#LDFLAGS = $(LIBS)
+
+all: main.hex size
+
+main.hex: main.c
+	avr-gcc -o main.elf $? $(CFLAGS) $(LDFLAGS)
+	avr-objcopy -j .text -j .data -O ihex main.elf main.hex
+
+f: flash
+flash: all
+	$(AVRDUDE) -U flash:w:main.hex:i
+
+dumpfuses:
+	$(AVRDUDE) -U lfuse:r:lfuse.txt:h
+	$(AVRDUDE) -U hfuse:r:hfuse.txt:h
+	$(AVRDUDE) -U efuse:r:efuse.txt:h
+
+clean:
+	rm -f *.o *.elf *.hex
+
+size:
+	avr-size --mcu=$(DEVICE) -t -A main.elf
+	avr-size --mcu=$(DEVICE) -C main.elf
+	avr-nm --size-sort main.elf
+
+
diff --git a/avr-attiny25-ampli-wakeup-delay/main.c b/avr-attiny25-ampli-wakeup-delay/main.c
new file mode 100644
index 0000000..6fb530e
--- /dev/null
+++ b/avr-attiny25-ampli-wakeup-delay/main.c
@@ -0,0 +1,23 @@
+#include <avr/io.h>
+#include <util/delay.h>
+
+int main(void)
+{
+    /* PB4 output */
+    DDRB  |=  _BV(4);
+    PORTB &= ~_BV(4);
+
+    //for (;;)
+    //{
+    //    _delay_ms(1000);
+    //    PORTB ^= _BV(4);
+    //}
+
+    // wait for 45s and enable the amplifier
+    for (uint8_t i = 0; i < 32; ++i) {
+        _delay_ms(1000);
+    }
+    PORTB |= _BV(4);
+
+    return 0;
+}
-- 
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