aboutsummaryrefslogtreecommitdiff
diff options
context:
space:
mode:
Diffstat
-rwxr-xr-xasm/blink/avrdasm2
-rw-r--r--asm/blink/blink.s12
-rw-r--r--asm/blink/dat.h20
-rw-r--r--asm/blink/makefile17
-rwxr-xr-xasm/blinkdelay/avrdasm2
-rw-r--r--asm/blinkdelay/blink.s24
-rw-r--r--asm/blinkdelay/dat.h20
-rw-r--r--asm/blinkdelay/makefile17
-rw-r--r--asm/blinkdelay2/avr.map404
-rwxr-xr-xasm/blinkdelay2/avrdasm2
-rw-r--r--asm/blinkdelay2/blink.s67
-rw-r--r--asm/blinkdelay2/dat.h25
-rw-r--r--asm/blinkdelay2/link.ld56
-rw-r--r--asm/blinkdelay2/m328p.ld8
-rw-r--r--asm/blinkdelay2/makefile19
-rwxr-xr-xasm/dht11/avrdasm2
-rw-r--r--asm/dht11/blink.s71
-rw-r--r--asm/dht11/dat.h25
-rw-r--r--asm/dht11/link.ld34
-rw-r--r--asm/dht11/makefile19
-rw-r--r--c/blink/blink.c23
-rw-r--r--c/timer/timer.c23
-rw-r--r--c/timer/timerctc.c26
-rw-r--r--readme.md3
24 files changed, 921 insertions, 0 deletions
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
+text 0x0000000000000000 0x0000000000020000 xr
+data 0x0000000000800060 0x000000000000ffa0 rw !x
+eeprom 0x0000000000810000 0x0000000000010000 rw !x
+fuse 0x0000000000820000 0x0000000000000400 rw !x
+lock 0x0000000000830000 0x0000000000000400 rw !x
+signature 0x0000000000840000 0x0000000000000400 rw !x
+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
+ 0x000000000000ffa0 __DATA_REGION_LENGTH__ = DEFINED (__DATA_REGION_LENGTH__)?__DATA_REGION_LENGTH__:0xffa0
+ 0x0000000000010000 __EEPROM_REGION_LENGTH__ = DEFINED (__EEPROM_REGION_LENGTH__)?__EEPROM_REGION_LENGTH__:0x10000
+ 0x0000000000000400 __FUSE_REGION_LENGTH__ = DEFINED (__FUSE_REGION_LENGTH__)?__FUSE_REGION_LENGTH__:0x400
+ 0x0000000000000400 __LOCK_REGION_LENGTH__ = DEFINED (__LOCK_REGION_LENGTH__)?__LOCK_REGION_LENGTH__:0x400
+ 0x0000000000000400 __SIGNATURE_REGION_LENGTH__ = DEFINED (__SIGNATURE_REGION_LENGTH__)?__SIGNATURE_REGION_LENGTH__:0x400
+ 0x0000000000000400 __USER_SIGNATURE_REGION_LENGTH__ = DEFINED (__USER_SIGNATURE_REGION_LENGTH__)?__USER_SIGNATURE_REGION_LENGTH__:0x400
+
+.hash
+ *(.hash)
+
+.dynsym
+ *(.dynsym)
+
+.dynstr
+ *(.dynstr)
+
+.gnu.version
+ *(.gnu.version)
+
+.gnu.version_d
+ *(.gnu.version_d)
+
+.gnu.version_r
+ *(.gnu.version_r)
+
+.rel.init
+ *(.rel.init)
+
+.rela.init
+ *(.rela.init)
+
+.rel.text
+ *(.rel.text)
+ *(.rel.text.*)
+ *(.rel.gnu.linkonce.t*)
+
+.rela.text
+ *(.rela.text)
+ *(.rela.text.*)
+ *(.rela.gnu.linkonce.t*)
+
+.rel.fini
+ *(.rel.fini)
+
+.rela.fini
+ *(.rela.fini)
+
+.rel.rodata
+ *(.rel.rodata)
+ *(.rel.rodata.*)
+ *(.rel.gnu.linkonce.r*)
+
+.rela.rodata
+ *(.rela.rodata)
+ *(.rela.rodata.*)
+ *(.rela.gnu.linkonce.r*)
+
+.rel.data
+ *(.rel.data)
+ *(.rel.data.*)
+ *(.rel.gnu.linkonce.d*)
+
+.rela.data
+ *(.rela.data)
+ *(.rela.data.*)
+ *(.rela.gnu.linkonce.d*)
+
+.rel.ctors
+ *(.rel.ctors)
+
+.rela.ctors
+ *(.rela.ctors)
+
+.rel.dtors
+ *(.rel.dtors)
+
+.rela.dtors
+ *(.rela.dtors)
+
+.rel.got
+ *(.rel.got)
+
+.rela.got
+ *(.rela.got)
+
+.rel.bss
+ *(.rel.bss)
+
+.rela.bss
+ *(.rela.bss)
+
+.rel.plt
+ *(.rel.plt)
+
+.rela.plt
+ *(.rela.plt)
+
+.text 0x0000000000000000 0x124
+ *(.vectors)
+ .vectors 0x0000000000000000 0x68 /usr/lib/gcc/avr/8.2.0/../../../../avr/lib/avr5/crtatmega328p.o
+ 0x0000000000000000 __vectors
+ 0x0000000000000000 __vector_default
+ *(.vectors)
+ *(.progmem.gcc*)
+ 0x0000000000000068 . = ALIGN (0x2)
+ 0x0000000000000068 __trampolines_start = .
+ *(.trampolines)
+ .trampolines 0x0000000000000068 0x0 linker stubs
+ *(.trampolines*)
+ 0x0000000000000068 __trampolines_end = .
+ *libprintf_flt.a:*(.progmem.data)
+ *libc.a:*(.progmem.data)
+ *(.progmem.*)
+ 0x0000000000000068 . = ALIGN (0x2)
+ *(.lowtext)
+ *(.lowtext*)
+ 0x0000000000000068 __ctors_start = .
+ *(.ctors)
+ 0x0000000000000068 __ctors_end = .
+ 0x0000000000000068 __dtors_start = .
+ *(.dtors)
+ 0x0000000000000068 __dtors_end = .
+ SORT_BY_NAME(*)(.ctors)
+ SORT_BY_NAME(*)(.dtors)
+ *(.init0)
+ .init0 0x0000000000000068 0x0 /usr/lib/gcc/avr/8.2.0/../../../../avr/lib/avr5/crtatmega328p.o
+ 0x0000000000000068 __init
+ *(.init0)
+ *(.init1)
+ *(.init1)
+ *(.init2)
+ .init2 0x0000000000000068 0xc /usr/lib/gcc/avr/8.2.0/../../../../avr/lib/avr5/crtatmega328p.o
+ *(.init2)
+ *(.init3)
+ *(.init3)
+ *(.init4)
+ *(.init4)
+ *(.init5)
+ *(.init5)
+ *(.init6)
+ *(.init6)
+ *(.init7)
+ *(.init7)
+ *(.init8)
+ *(.init8)
+ *(.init9)
+ .init9 0x0000000000000074 0x8 /usr/lib/gcc/avr/8.2.0/../../../../avr/lib/avr5/crtatmega328p.o
+ *(.init9)
+ *(.text)
+ .text 0x000000000000007c 0x4 /usr/lib/gcc/avr/8.2.0/../../../../avr/lib/avr5/crtatmega328p.o
+ 0x000000000000007c __vector_22
+ 0x000000000000007c __vector_1
+ 0x000000000000007c __vector_24
+ 0x000000000000007c __vector_12
+ 0x000000000000007c __bad_interrupt
+ 0x000000000000007c __vector_6
+ 0x000000000000007c __vector_3
+ 0x000000000000007c __vector_23
+ 0x000000000000007c __vector_25
+ 0x000000000000007c __vector_11
+ 0x000000000000007c __vector_13
+ 0x000000000000007c __vector_17
+ 0x000000000000007c __vector_19
+ 0x000000000000007c __vector_7
+ 0x000000000000007c __vector_5
+ 0x000000000000007c __vector_4
+ 0x000000000000007c __vector_9
+ 0x000000000000007c __vector_2
+ 0x000000000000007c __vector_21
+ 0x000000000000007c __vector_15
+ 0x000000000000007c __vector_8
+ 0x000000000000007c __vector_14
+ 0x000000000000007c __vector_10
+ 0x000000000000007c __vector_16
+ 0x000000000000007c __vector_18
+ 0x000000000000007c __vector_20
+ .text 0x0000000000000080 0xa0 /tmp/ccnHW39M.o
+ 0x0000000000000080 vectors
+ 0x00000000000000fe main
+ .text 0x0000000000000120 0x0 /usr/lib/gcc/avr/8.2.0/avr5/libgcc.a(_exit.o)
+ 0x0000000000000120 . = ALIGN (0x2)
+ *(.text.*)
+ .text.libgcc.mul
+ 0x0000000000000120 0x0 /usr/lib/gcc/avr/8.2.0/avr5/libgcc.a(_exit.o)
+ .text.libgcc.div
+ 0x0000000000000120 0x0 /usr/lib/gcc/avr/8.2.0/avr5/libgcc.a(_exit.o)
+ .text.libgcc 0x0000000000000120 0x0 /usr/lib/gcc/avr/8.2.0/avr5/libgcc.a(_exit.o)
+ .text.libgcc.prologue
+ 0x0000000000000120 0x0 /usr/lib/gcc/avr/8.2.0/avr5/libgcc.a(_exit.o)
+ .text.libgcc.builtins
+ 0x0000000000000120 0x0 /usr/lib/gcc/avr/8.2.0/avr5/libgcc.a(_exit.o)
+ .text.libgcc.fmul
+ 0x0000000000000120 0x0 /usr/lib/gcc/avr/8.2.0/avr5/libgcc.a(_exit.o)
+ .text.libgcc.fixed
+ 0x0000000000000120 0x0 /usr/lib/gcc/avr/8.2.0/avr5/libgcc.a(_exit.o)
+ 0x0000000000000120 . = ALIGN (0x2)
+ *(.fini9)
+ .fini9 0x0000000000000120 0x0 /usr/lib/gcc/avr/8.2.0/avr5/libgcc.a(_exit.o)
+ 0x0000000000000120 exit
+ 0x0000000000000120 _exit
+ *(.fini9)
+ *(.fini8)
+ *(.fini8)
+ *(.fini7)
+ *(.fini7)
+ *(.fini6)
+ *(.fini6)
+ *(.fini5)
+ *(.fini5)
+ *(.fini4)
+ *(.fini4)
+ *(.fini3)
+ *(.fini3)
+ *(.fini2)
+ *(.fini2)
+ *(.fini1)
+ *(.fini1)
+ *(.fini0)
+ .fini0 0x0000000000000120 0x4 /usr/lib/gcc/avr/8.2.0/avr5/libgcc.a(_exit.o)
+ *(.fini0)
+ *(.hightext)
+ *(.hightext*)
+ *(.progmemx.*)
+ 0x0000000000000124 . = ALIGN (0x2)
+ *(.jumptables)
+ *(.jumptables*)
+ 0x0000000000000124 _etext = .
+
+.data 0x0000000000800100 0x0 load address 0x0000000000000124
+ [!provide] PROVIDE (__data_start = .)
+ *(.data)
+ .data 0x0000000000800100 0x0 /usr/lib/gcc/avr/8.2.0/../../../../avr/lib/avr5/crtatmega328p.o
+ .data 0x0000000000800100 0x0 /tmp/ccnHW39M.o
+ .data 0x0000000000800100 0x0 /usr/lib/gcc/avr/8.2.0/avr5/libgcc.a(_exit.o)
+ *(.data*)
+ *(.gnu.linkonce.d*)
+ *(.rodata)
+ *(.rodata*)
+ *(.gnu.linkonce.r*)
+ 0x0000000000800100 . = ALIGN (0x2)
+ 0x0000000000800100 _edata = .
+ [!provide] PROVIDE (__data_end = .)
+
+.bss 0x0000000000800100 0x0
+ [!provide] PROVIDE (__bss_start = .)
+ *(.bss)
+ .bss 0x0000000000800100 0x0 /usr/lib/gcc/avr/8.2.0/../../../../avr/lib/avr5/crtatmega328p.o
+ .bss 0x0000000000800100 0x0 /tmp/ccnHW39M.o
+ .bss 0x0000000000800100 0x0 /usr/lib/gcc/avr/8.2.0/avr5/libgcc.a(_exit.o)
+ *(.bss*)
+ *(COMMON)
+ [!provide] PROVIDE (__bss_end = .)
+ 0x0000000000000124 __data_load_start = LOADADDR (.data)
+ 0x0000000000000124 __data_load_end = (__data_load_start + SIZEOF (.data))
+
+.noinit 0x0000000000800100 0x0
+ [!provide] PROVIDE (__noinit_start = .)
+ *(.noinit*)
+ [!provide] PROVIDE (__noinit_end = .)
+ 0x0000000000800100 _end = .
+ [!provide] PROVIDE (__heap_start = .)
+
+.eeprom 0x0000000000810000 0x0
+ *(.eeprom*)
+ 0x0000000000810000 __eeprom_end = .
+
+.fuse
+ *(.fuse)
+ *(.lfuse)
+ *(.hfuse)
+ *(.efuse)
+
+.lock
+ *(.lock*)
+
+.signature
+ *(.signature*)
+
+.stab
+ *(.stab)
+
+.stabstr
+ *(.stabstr)
+
+.stab.excl
+ *(.stab.excl)
+
+.stab.exclstr
+ *(.stab.exclstr)
+
+.stab.index
+ *(.stab.index)
+
+.stab.indexstr
+ *(.stab.indexstr)
+
+.comment
+ *(.comment)
+
+.note.gnu.avr.deviceinfo
+ 0x0000000000000000 0x40
+ .note.gnu.avr.deviceinfo
+ 0x0000000000000000 0x40 /usr/lib/gcc/avr/8.2.0/../../../../avr/lib/avr5/crtatmega328p.o
+
+.note.gnu.build-id
+ *(.note.gnu.build-id)
+
+.debug
+ *(.debug)
+
+.line
+ *(.line)
+
+.debug_srcinfo
+ *(.debug_srcinfo)
+
+.debug_sfnames
+ *(.debug_sfnames)
+
+.debug_aranges
+ *(.debug_aranges)
+
+.debug_pubnames
+ *(.debug_pubnames)
+
+.debug_info 0x0000000000000000 0x5f4
+ *(.debug_info .gnu.linkonce.wi.*)
+ .debug_info 0x0000000000000000 0x5f4 /usr/lib/gcc/avr/8.2.0/../../../../avr/lib/avr5/crtatmega328p.o
+
+.debug_abbrev 0x0000000000000000 0x5a2
+ *(.debug_abbrev)
+ .debug_abbrev 0x0000000000000000 0x5a2 /usr/lib/gcc/avr/8.2.0/../../../../avr/lib/avr5/crtatmega328p.o
+
+.debug_line 0x0000000000000000 0x1d
+ *(.debug_line .debug_line.* .debug_line_end)
+ .debug_line 0x0000000000000000 0x1d /usr/lib/gcc/avr/8.2.0/../../../../avr/lib/avr5/crtatmega328p.o
+
+.debug_frame
+ *(.debug_frame)
+
+.debug_str 0x0000000000000000 0x208
+ *(.debug_str)
+ .debug_str 0x0000000000000000 0x208 /usr/lib/gcc/avr/8.2.0/../../../../avr/lib/avr5/crtatmega328p.o
+
+.debug_loc
+ *(.debug_loc)
+
+.debug_macinfo
+ *(.debug_macinfo)
+
+.debug_weaknames
+ *(.debug_weaknames)
+
+.debug_funcnames
+ *(.debug_funcnames)
+
+.debug_typenames
+ *(.debug_typenames)
+
+.debug_varnames
+ *(.debug_varnames)
+
+.debug_pubtypes
+ *(.debug_pubtypes)
+
+.debug_ranges
+ *(.debug_ranges)
+
+.debug_macro
+ *(.debug_macro)
+
+.debug_addr
+ *(.debug_addr)
+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.