From edf5f145013aa28ffbc7f19f874cd489a92f8449 Mon Sep 17 00:00:00 2001
From: rodri <rgl@antares-labs.eu>
Date: Sat, 5 Jun 2021 11:10:23 +0000
Subject: public release.

---
 asm/blink/avrdasm        |   2 +
 asm/blink/blink.s        |  12 ++
 asm/blink/dat.h          |  20 +++
 asm/blink/makefile       |  17 ++
 asm/blinkdelay/avrdasm   |   2 +
 asm/blinkdelay/blink.s   |  24 +++
 asm/blinkdelay/dat.h     |  20 +++
 asm/blinkdelay/makefile  |  17 ++
 asm/blinkdelay2/avr.map  | 404 +++++++++++++++++++++++++++++++++++++++++++++++
 asm/blinkdelay2/avrdasm  |   2 +
 asm/blinkdelay2/blink.s  |  67 ++++++++
 asm/blinkdelay2/dat.h    |  25 +++
 asm/blinkdelay2/link.ld  |  56 +++++++
 asm/blinkdelay2/m328p.ld |   8 +
 asm/blinkdelay2/makefile |  19 +++
 asm/dht11/avrdasm        |   2 +
 asm/dht11/blink.s        |  71 +++++++++
 asm/dht11/dat.h          |  25 +++
 asm/dht11/link.ld        |  34 ++++
 asm/dht11/makefile       |  19 +++
 c/blink/blink.c          |  23 +++
 c/timer/timer.c          |  23 +++
 c/timer/timerctc.c       |  26 +++
 readme.md                |   3 +
 24 files changed, 921 insertions(+)
 create mode 100755 asm/blink/avrdasm
 create mode 100644 asm/blink/blink.s
 create mode 100644 asm/blink/dat.h
 create mode 100644 asm/blink/makefile
 create mode 100755 asm/blinkdelay/avrdasm
 create mode 100644 asm/blinkdelay/blink.s
 create mode 100644 asm/blinkdelay/dat.h
 create mode 100644 asm/blinkdelay/makefile
 create mode 100644 asm/blinkdelay2/avr.map
 create mode 100755 asm/blinkdelay2/avrdasm
 create mode 100644 asm/blinkdelay2/blink.s
 create mode 100644 asm/blinkdelay2/dat.h
 create mode 100644 asm/blinkdelay2/link.ld
 create mode 100644 asm/blinkdelay2/m328p.ld
 create mode 100644 asm/blinkdelay2/makefile
 create mode 100755 asm/dht11/avrdasm
 create mode 100644 asm/dht11/blink.s
 create mode 100644 asm/dht11/dat.h
 create mode 100644 asm/dht11/link.ld
 create mode 100644 asm/dht11/makefile
 create mode 100644 c/blink/blink.c
 create mode 100644 c/timer/timer.c
 create mode 100644 c/timer/timerctc.c
 create mode 100644 readme.md

diff --git a/asm/blink/avrdasm b/asm/blink/avrdasm
new file mode 100755
index 0000000..ea0707b
--- /dev/null
+++ b/asm/blink/avrdasm
@@ -0,0 +1,2 @@
+#!/bin/sh
+avr-objdump -D *.elf
diff --git a/asm/blink/blink.s b/asm/blink/blink.s
new file mode 100644
index 0000000..8577db3
--- /dev/null
+++ b/asm/blink/blink.s
@@ -0,0 +1,12 @@
+.include "dat.h"
+
+.globl main
+main:
+	ldi r16, 1<<DDRB5
+	ori r16, 1<<DDRB4
+	ldi r17, 0<<PORTB5
+	ldi r17, 1<<PORTB4
+	out DDRB, r16
+	out PORTB, r17
+halt:
+	rjmp halt
diff --git a/asm/blink/dat.h b/asm/blink/dat.h
new file mode 100644
index 0000000..d3783b6
--- /dev/null
+++ b/asm/blink/dat.h
@@ -0,0 +1,20 @@
+/* Data Registers */
+.equ PORTB,	0x05
+.equ PORTB0,	0
+.equ PORTB1,	1
+.equ PORTB2,	2
+.equ PORTB3,	3
+.equ PORTB4,	4
+.equ PORTB5,	5
+.equ PORTB6,	6
+.equ PORTB7,	7
+/* Data Direction Registers */
+.equ DDRB,	0x04
+.equ DDRB0,	0
+.equ DDRB1,	1
+.equ DDRB2,	2
+.equ DDRB3,	3
+.equ DDRB4,	4
+.equ DDRB5,	5
+.equ DDRB6,	6
+.equ DDRB7,	7
diff --git a/asm/blink/makefile b/asm/blink/makefile
new file mode 100644
index 0000000..4790211
--- /dev/null
+++ b/asm/blink/makefile
@@ -0,0 +1,17 @@
+CC=avr-gcc
+AS=avr-as
+
+PORT=/dev/ttyACM0
+TARG=blink
+
+all: build
+
+build:
+	$(AS) -mmcu=atmega328p -o $(TARG).elf $(TARG).s
+	avr-objcopy -j .text -j .data -O ihex $(TARG).elf $(TARG).hex
+
+burn:
+	avrdude -v -p atmega328p -c arduino -P $(PORT) -b 115200 -D -U flash:w:$(TARG).hex
+
+clean:
+	rm -f $(TARG).elf $(TARG).hex
diff --git a/asm/blinkdelay/avrdasm b/asm/blinkdelay/avrdasm
new file mode 100755
index 0000000..ea0707b
--- /dev/null
+++ b/asm/blinkdelay/avrdasm
@@ -0,0 +1,2 @@
+#!/bin/sh
+avr-objdump -D *.elf
diff --git a/asm/blinkdelay/blink.s b/asm/blinkdelay/blink.s
new file mode 100644
index 0000000..30219b1
--- /dev/null
+++ b/asm/blinkdelay/blink.s
@@ -0,0 +1,24 @@
+.include "dat.h"
+
+.globl main
+main:
+	ldi r16, 1<<DDRB5
+	ldi r17, 0<<PORTB5
+	out DDRB, r16
+	out PORTB, r17
+loop:
+	/* delay loop */
+	ldi r18, 82
+	ldi r19, 43
+	ldi r20, 0
+l1:
+	dec r20
+	brne l1
+	dec r19
+	brne l1
+	dec r18
+	brne l1
+	in r16, PORTB
+	com r16
+	out PORTB, r16
+	rjmp loop
diff --git a/asm/blinkdelay/dat.h b/asm/blinkdelay/dat.h
new file mode 100644
index 0000000..d3783b6
--- /dev/null
+++ b/asm/blinkdelay/dat.h
@@ -0,0 +1,20 @@
+/* Data Registers */
+.equ PORTB,	0x05
+.equ PORTB0,	0
+.equ PORTB1,	1
+.equ PORTB2,	2
+.equ PORTB3,	3
+.equ PORTB4,	4
+.equ PORTB5,	5
+.equ PORTB6,	6
+.equ PORTB7,	7
+/* Data Direction Registers */
+.equ DDRB,	0x04
+.equ DDRB0,	0
+.equ DDRB1,	1
+.equ DDRB2,	2
+.equ DDRB3,	3
+.equ DDRB4,	4
+.equ DDRB5,	5
+.equ DDRB6,	6
+.equ DDRB7,	7
diff --git a/asm/blinkdelay/makefile b/asm/blinkdelay/makefile
new file mode 100644
index 0000000..4ad8b12
--- /dev/null
+++ b/asm/blinkdelay/makefile
@@ -0,0 +1,17 @@
+CC=avr-gcc
+AS=avr-as
+
+PORT=/dev/ttyACM0
+TARG=blink
+
+all: build
+
+build:
+	$(CC) -mmcu=atmega328p -o $(TARG).elf $(TARG).s
+	avr-objcopy -j .text -j .data -O ihex $(TARG).elf $(TARG).hex
+
+burn:
+	avrdude -v -p atmega328p -c arduino -P $(PORT) -b 115200 -D -U flash:w:$(TARG).hex
+
+clean:
+	rm -f $(TARG).elf $(TARG).hex
diff --git a/asm/blinkdelay2/avr.map b/asm/blinkdelay2/avr.map
new file mode 100644
index 0000000..844079f
--- /dev/null
+++ b/asm/blinkdelay2/avr.map
@@ -0,0 +1,404 @@
+Archive member included to satisfy reference by file (symbol)
+
+/usr/lib/gcc/avr/8.2.0/avr5/libgcc.a(_exit.o)
+                              /usr/lib/gcc/avr/8.2.0/../../../../avr/lib/avr5/crtatmega328p.o (exit)
+
+Memory Configuration
+
+Name             Origin             Length             Attributes
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+data             0x0000000000800060 0x000000000000ffa0 rw !x
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+user_signatures  0x0000000000850000 0x0000000000000400 rw !x
+*default*        0x0000000000000000 0xffffffffffffffff
+
+Linker script and memory map
+
+Address of section .data set to 0x800100
+LOAD /usr/lib/gcc/avr/8.2.0/../../../../avr/lib/avr5/crtatmega328p.o
+LOAD /tmp/ccnHW39M.o
+START GROUP
+LOAD /usr/lib/gcc/avr/8.2.0/avr5/libgcc.a
+LOAD /usr/lib/gcc/avr/8.2.0/../../../../avr/lib/avr5/libm.a
+LOAD /usr/lib/gcc/avr/8.2.0/../../../../avr/lib/avr5/libc.a
+LOAD /usr/lib/gcc/avr/8.2.0/../../../../avr/lib/avr5/libatmega328p.a
+END GROUP
+                0x0000000000020000                __TEXT_REGION_LENGTH__ = DEFINED (__TEXT_REGION_LENGTH__)?__TEXT_REGION_LENGTH__:0x20000
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+OUTPUT(blink.elf elf32-avr)
+LOAD linker stubs
diff --git a/asm/blinkdelay2/avrdasm b/asm/blinkdelay2/avrdasm
new file mode 100755
index 0000000..ea0707b
--- /dev/null
+++ b/asm/blinkdelay2/avrdasm
@@ -0,0 +1,2 @@
+#!/bin/sh
+avr-objdump -D *.elf
diff --git a/asm/blinkdelay2/blink.s b/asm/blinkdelay2/blink.s
new file mode 100644
index 0000000..efc9255
--- /dev/null
+++ b/asm/blinkdelay2/blink.s
@@ -0,0 +1,67 @@
+.include "dat.h"
+
+vectors:
+	jmp start
+	jmp badirq	; IRQ0
+	jmp badirq	; IRQ1
+	jmp badirq	; PCINT0
+	jmp badirq	; PCINT1
+	jmp badirq	; PCINT2
+	jmp badirq	; Watchdog Timeout
+	jmp badirq	; Timer2 CompareA
+	jmp badirq	; Timer2 CompareB
+	jmp badirq	; Timer2 Overflow
+	jmp badirq	; Timer1 Capture
+	jmp badirq	; Timer1 CompareA
+	jmp badirq	; Timer1 CompareB
+	jmp badirq	; Timer1 Overflow
+	jmp badirq	; Timer0 CompareA
+	jmp badirq	; Timer0 CompareB
+	jmp badirq	; Timer0 Overflow
+	jmp badirq	; SPI Transfer Complete
+	jmp badirq	; USART RX Complete
+	jmp badirq	; USART UDR Empty
+	jmp badirq	; USART TX Complete
+	jmp badirq	; ADC Conversion Complete
+	jmp badirq	; EEPROM Ready
+	jmp badirq	; Analog Comparator
+	jmp badirq	; 2-wire Serial
+	jmp badirq	; SPM Ready
+
+start:
+	eor r1, r1
+	out SREG, r1
+	ldi r28, 0xff
+	ldi r29, 0x8
+	out SPL, r28
+	out SPH, r29
+	call main
+halt:
+	rjmp halt
+
+badirq:
+	jmp vectors
+
+.globl main
+main:
+	ldi r16, 1<<DDRB4|1<<DDRB5
+	ldi r17, 0<<PORTB4|0<<PORTB5
+	out DDRB, r16
+	out PORTB, r17
+loop:
+	/* delay loop */
+	ldi r18, 82
+	ldi r19, 43
+	ldi r20, 0
+l1:
+	dec r20
+	brne l1
+	dec r19
+	brne l1
+	dec r18
+	brne l1
+	in r17, PORTB
+	com r17
+	andi r17, 1<<PORTB4
+	out PORTB, r17
+	rjmp loop
diff --git a/asm/blinkdelay2/dat.h b/asm/blinkdelay2/dat.h
new file mode 100644
index 0000000..5aed9cc
--- /dev/null
+++ b/asm/blinkdelay2/dat.h
@@ -0,0 +1,25 @@
+/* Data Registers */
+.equ PORTB,	0x05
+.equ PORTB0,	0
+.equ PORTB1,	1
+.equ PORTB2,	2
+.equ PORTB3,	3
+.equ PORTB4,	4
+.equ PORTB5,	5
+.equ PORTB6,	6
+.equ PORTB7,	7
+/* Data Direction Registers */
+.equ DDRB,	0x04
+.equ DDRB0,	0
+.equ DDRB1,	1
+.equ DDRB2,	2
+.equ DDRB3,	3
+.equ DDRB4,	4
+.equ DDRB5,	5
+.equ DDRB6,	6
+.equ DDRB7,	7
+/* Stack */
+.equ SPL,	0x3d
+.equ SPH,	0x3e
+/* Status Register */
+.equ SREG,	0x3f
diff --git a/asm/blinkdelay2/link.ld b/asm/blinkdelay2/link.ld
new file mode 100644
index 0000000..671a3c6
--- /dev/null
+++ b/asm/blinkdelay2/link.ld
@@ -0,0 +1,56 @@
+OUTPUT_FORMAT("elf32-avr","elf32-avr","elf32-avr")
+OUTPUT_ARCH(avr:5)
+MEMORY
+{
+	text		(rx)   : ORIGIN = 0, LENGTH = 128K
+	data		(rw!x) : ORIGIN = 0x800060, LENGTH = 64K /* 0xffa0? */
+	eeprom		(rw!x) : ORIGIN = 0x810000, LENGTH = 64K
+	fuse		(rw!x) : ORIGIN = 0x820000, LENGTH = 1K
+	lock		(rw!x) : ORIGIN = 0x830000, LENGTH = 1K
+	signature	(rw!x) : ORIGIN = 0x840000, LENGTH = 1K
+	user_signatures	(rw!x) : ORIGIN = 0x850000, LENGTH = 1K
+}
+SECTIONS
+{
+	.text :
+	{
+		*(.vectors)
+		KEEP(*(.vectors))
+		*(.start)
+		*(.text)
+		_etext = .;
+	} >text
+	.data :
+	{
+		*(.data)
+		. = ALIGN(2);
+		_edata = . ;
+	} >data AT>text
+	.bss ADDR(.data) + SIZEOF (.data) : AT (ADDR (.bss))
+	{
+		*(.bss)
+		*(.bss*)
+		*(COMMON)
+		. = ALIGN(2);
+	} >data
+	.eeprom :
+	{
+		KEEP(*(.eeprom*))
+	} >eeprom
+	.fuse :
+	{
+		KEEP(*(.fuse))
+		KEEP(*(.lfuse))
+		KEEP(*(.hfuse))
+		KEEP(*(.efuse))
+	} >fuse
+	.lock :
+	{
+		KEEP(*(.lock*))
+	} >lock
+	.signature :
+	{
+		KEEP(*(.signature*))
+	} >signature
+	_end = .;
+}
diff --git a/asm/blinkdelay2/m328p.ld b/asm/blinkdelay2/m328p.ld
new file mode 100644
index 0000000..cc16198
--- /dev/null
+++ b/asm/blinkdelay2/m328p.ld
@@ -0,0 +1,8 @@
+SECTIONS
+{
+  . = 0x0;
+  .text : { *(.text) }
+  . = 0x8000000;
+  .data : { *(.data) }
+  .bss : { *(.bss) }
+}
diff --git a/asm/blinkdelay2/makefile b/asm/blinkdelay2/makefile
new file mode 100644
index 0000000..063bd39
--- /dev/null
+++ b/asm/blinkdelay2/makefile
@@ -0,0 +1,19 @@
+AS=avr-as
+LD=avr-ld
+LDSCRIPT=link.ld
+
+PORT=/dev/ttyACM0
+TARG=blink
+
+all: build
+
+build:
+	$(AS) -mmcu=atmega328p -c -o $(TARG).o $(TARG).s
+	$(LD) -T$(LDSCRIPT) -o $(TARG).elf $(TARG).o
+	avr-objcopy -j .text -j .data -O ihex $(TARG).elf $(TARG).hex
+
+burn:
+	avrdude -v -p atmega328p -c arduino -P $(PORT) -b 115200 -D -U flash:w:$(TARG).hex
+
+clean:
+	rm -f $(TARG).elf $(TARG).o $(TARG).hex
diff --git a/asm/dht11/avrdasm b/asm/dht11/avrdasm
new file mode 100755
index 0000000..ea0707b
--- /dev/null
+++ b/asm/dht11/avrdasm
@@ -0,0 +1,2 @@
+#!/bin/sh
+avr-objdump -D *.elf
diff --git a/asm/dht11/blink.s b/asm/dht11/blink.s
new file mode 100644
index 0000000..5fe337f
--- /dev/null
+++ b/asm/dht11/blink.s
@@ -0,0 +1,71 @@
+.include "dat.h"
+
+vectors:
+	jmp start
+	jmp badirq	; IRQ0
+	jmp badirq	; IRQ1
+	jmp badirq	; PCINT0
+	jmp badirq	; PCINT1
+	jmp badirq	; PCINT2
+	jmp badirq	; Watchdog Timeout
+	jmp badirq	; Timer2 CompareA
+	jmp badirq	; Timer2 CompareB
+	jmp badirq	; Timer2 Overflow
+	jmp badirq	; Timer1 Capture
+	jmp badirq	; Timer1 CompareA
+	jmp badirq	; Timer1 CompareB
+	jmp badirq	; Timer1 Overflow
+	jmp badirq	; Timer0 CompareA
+	jmp badirq	; Timer0 CompareB
+	jmp badirq	; Timer0 Overflow
+	jmp badirq	; SPI Transfer Complete
+	jmp badirq	; USART RX Complete
+	jmp badirq	; USART UDR Empty
+	jmp badirq	; USART TX Complete
+	jmp badirq	; ADC Conversion Complete
+	jmp badirq	; EEPROM Ready
+	jmp badirq	; Analog Comparator
+	jmp badirq	; 2-wire Serial
+	jmp badirq	; SPM Ready
+
+start:
+	eor r1, r1
+	out SREG, r1
+	ldi r28, 0xff
+	ldi r29, 0x8
+	out SPL, r28
+	out SPH, r29
+	call main
+halt:
+	rjmp halt
+
+badirq:
+	jmp vectors
+
+.globl delayloop
+delayloop:
+	ldi r18, 82
+	ldi r19, 43
+	ldi r20, 0
+l1:
+	dec r20
+	brne l1
+	dec r19
+	brne l1
+	dec r18
+	brne l1
+	ret
+
+.globl main
+main:
+	ldi r16, 1<<DDRB4|1<<DDRB5
+	ldi r17, 0<<PORTB4|0<<PORTB5
+	out DDRB, r16
+	out PORTB, r17
+∞:
+	call delayloop
+	in r17, PORTB
+	com r17
+	;andi r17, 1<<PORTB4
+	out PORTB, r17
+	rjmp ∞
diff --git a/asm/dht11/dat.h b/asm/dht11/dat.h
new file mode 100644
index 0000000..5aed9cc
--- /dev/null
+++ b/asm/dht11/dat.h
@@ -0,0 +1,25 @@
+/* Data Registers */
+.equ PORTB,	0x05
+.equ PORTB0,	0
+.equ PORTB1,	1
+.equ PORTB2,	2
+.equ PORTB3,	3
+.equ PORTB4,	4
+.equ PORTB5,	5
+.equ PORTB6,	6
+.equ PORTB7,	7
+/* Data Direction Registers */
+.equ DDRB,	0x04
+.equ DDRB0,	0
+.equ DDRB1,	1
+.equ DDRB2,	2
+.equ DDRB3,	3
+.equ DDRB4,	4
+.equ DDRB5,	5
+.equ DDRB6,	6
+.equ DDRB7,	7
+/* Stack */
+.equ SPL,	0x3d
+.equ SPH,	0x3e
+/* Status Register */
+.equ SREG,	0x3f
diff --git a/asm/dht11/link.ld b/asm/dht11/link.ld
new file mode 100644
index 0000000..0e8fb64
--- /dev/null
+++ b/asm/dht11/link.ld
@@ -0,0 +1,34 @@
+OUTPUT_FORMAT("elf32-avr","elf32-avr","elf32-avr")
+OUTPUT_ARCH(avr:5)
+MEMORY
+{
+	text		(rx)   : ORIGIN = 0, LENGTH = 32K
+	data		(rw!x) : ORIGIN = 0x800100, LENGTH = 2303
+	eeprom		(rw!x) : ORIGIN = 0x800900, LENGTH = 1K
+}
+SECTIONS
+{
+	.text :
+	{
+		*(.vectors)
+		*(.text)
+		_etext = .;
+	} >text
+	.data :
+	{
+		*(.data)
+		. = ALIGN(2);
+		_edata = . ;
+	} >data AT>text
+	.bss ADDR(.data) + SIZEOF (.data) : AT (ADDR (.bss))
+	{
+		*(.bss)
+		*(COMMON)
+		. = ALIGN(2);
+	} >data
+	.eeprom :
+	{
+		*(.eeprom*)
+	} >eeprom
+	_end = .;
+}
diff --git a/asm/dht11/makefile b/asm/dht11/makefile
new file mode 100644
index 0000000..063bd39
--- /dev/null
+++ b/asm/dht11/makefile
@@ -0,0 +1,19 @@
+AS=avr-as
+LD=avr-ld
+LDSCRIPT=link.ld
+
+PORT=/dev/ttyACM0
+TARG=blink
+
+all: build
+
+build:
+	$(AS) -mmcu=atmega328p -c -o $(TARG).o $(TARG).s
+	$(LD) -T$(LDSCRIPT) -o $(TARG).elf $(TARG).o
+	avr-objcopy -j .text -j .data -O ihex $(TARG).elf $(TARG).hex
+
+burn:
+	avrdude -v -p atmega328p -c arduino -P $(PORT) -b 115200 -D -U flash:w:$(TARG).hex
+
+clean:
+	rm -f $(TARG).elf $(TARG).o $(TARG).hex
diff --git a/c/blink/blink.c b/c/blink/blink.c
new file mode 100644
index 0000000..bb4495a
--- /dev/null
+++ b/c/blink/blink.c
@@ -0,0 +1,23 @@
+#include <avr/io.h>
+#define F_CPU	16000000UL
+#include <util/delay.h>
+
+enum{
+	Delay	= 300
+};
+
+int
+main()
+{
+	int led;
+
+	led = 1<<PB1;
+	DDRB |= led;
+
+	for(;;){
+		PORTB ^= led;
+		_delay_ms(Delay);
+	}
+	return 0;
+}
+
diff --git a/c/timer/timer.c b/c/timer/timer.c
new file mode 100644
index 0000000..f1231b1
--- /dev/null
+++ b/c/timer/timer.c
@@ -0,0 +1,23 @@
+#include <avr/io.h>
+
+enum{
+	Dcnt = 62499
+};
+
+int
+main()
+{
+	int led;
+
+	led = 1<<PB1;
+	DDRB |= led;
+	TCCR1B |= 1<<CS12;
+
+	for(;;){
+		if(TCNT1 >= Dcnt){
+			PORTB ^= led;
+			TCNT1 = 0;
+		}
+	}
+}
+
diff --git a/c/timer/timerctc.c b/c/timer/timerctc.c
new file mode 100644
index 0000000..7e65b52
--- /dev/null
+++ b/c/timer/timerctc.c
@@ -0,0 +1,26 @@
+#include <avr/io.h>
+
+enum{
+	Dcnt	= 62499	/* 1Hz */
+};
+
+int
+main()
+{
+	int led;
+
+	led = 1<<PB1;
+	DDRB |= led;
+	TCCR1B |= 1<<CS12;	/* f/256 prescaling */
+	TCCR1B |= 1<<WGM12;	/* ctc op mode */
+	OCR1A = Dcnt;		/* setup TOP */
+
+	for(;;){
+		/* check if we reached TOP */
+		if(TIFR1 & (1<<OCF1A)){
+			PORTB ^= led;
+			TIFR1 = 1<<OCF1A;	/* reset the flag */
+		}
+	}
+}
+
diff --git a/readme.md b/readme.md
new file mode 100644
index 0000000..c1731dd
--- /dev/null
+++ b/readme.md
@@ -0,0 +1,3 @@
+# AVR toys
+
+Some little AVR microcontroller projects I worked on.
-- 
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