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/dht11/avrdasm  |  2 ++
 asm/dht11/blink.s  | 71 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
 asm/dht11/dat.h    | 25 +++++++++++++++++++
 asm/dht11/link.ld  | 34 ++++++++++++++++++++++++++
 asm/dht11/makefile | 19 +++++++++++++++
 5 files changed, 151 insertions(+)
 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

(limited to 'asm/dht11')

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
-- 
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