Difference between revisions of "AVR Development"
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[[Category:Computing]] | [[Category:Computing]] | ||
| − | [[Atmel AVR]] | + | The [[Atmel AVR]] micros are well supported in the [[FOSS Advocacy| FOSS]] world with complete development tool chains such as a C compiler, simulator, debugger, downloader etc. |
| + | |||
| + | We prefer to develop in C and use standard Unix command-line tools. | ||
| + | |||
| + | An alternative is to use the [[Arduino]] Integrated Development Environment (IDE), which runs on a Java Virtual Machine (JVM) and the coding style is C++ based. | ||
== Support in Debian GNU/Linux and variants == | == Support in Debian GNU/Linux and variants == | ||
| Line 6: | Line 10: | ||
* binutils-avr - Binary utilities supporting Atmel's AVR targets | * binutils-avr - Binary utilities supporting Atmel's AVR targets | ||
* gcc-avr - The GNU C compiler (cross compiler for avr) | * gcc-avr - The GNU C compiler (cross compiler for avr) | ||
| + | * [http://www.nongnu.org/avr-libc/ avr-libc] - libc for AVR | ||
* gdb-avr - The GNU Debugger for avr | * gdb-avr - The GNU Debugger for avr | ||
| − | * simulavr - Atmel AVR simulator | + | * simulavr - [[Atmel AVR]] simulator |
| − | * | + | * [[AVRDUDE]] - software for programming [[Atmel AVR]] microcontrollers |
All the other usual tools such as make, editors, version control etc. can be used as per any other development project. | All the other usual tools such as make, editors, version control etc. can be used as per any other development project. | ||
| + | |||
| + | == Makefile template == | ||
| + | A template Makefile: | ||
| + | <pre> | ||
| + | PROJNAME = ... | ||
| + | DEVICE = atmega328p | ||
| + | CC = avr-gcc | ||
| + | INCS = -Iusbdrv -I. | ||
| + | CFLAGS = -Wall -Os $(INCS) -mmcu=$(DEVICE) -DDEBUG_LEVEL=0 | ||
| + | AVRDUDE = avrdude -p $(DEVICE) -c arduino -P /dev/ftdi_cable1 -b 57600 -v | ||
| + | USBDRV_OBJS = usbdrv/usbdrv.o usbdrv/usbdrvasm.o usbdrv/oddebug.o | ||
| + | |||
| + | # symbolic targets: | ||
| + | all: $(PROJNAME).hex | ||
| + | |||
| + | .c.o: | ||
| + | $(CC) -c $(CFLAGS) $< -o $@ | ||
| + | |||
| + | .S.o: | ||
| + | $(CC) -x assembler-with-cpp -c $(CFLAGS) $< -o $@ | ||
| + | |||
| + | .c.s: | ||
| + | $(CC) -S $(CFLAGS) $< -o $@ | ||
| + | |||
| + | %.bin: %.o $(USBDRV_OBJS) | ||
| + | $(CC) $(CFLAGS) -o $@ $< $(USBDRV_OBJS) | ||
| + | |||
| + | %.hex: %.bin | ||
| + | rm -f $@ | ||
| + | avr-objcopy -j .text -j .data -O ihex $< $@ | ||
| + | |||
| + | flash: all | ||
| + | $(AVRDUDE) -U flash:w:$(PROJNAME).hex | ||
| + | </pre> | ||
| + | |||
| + | == Downloading to target == | ||
| + | The standard downloader for [[Linux]] is [[AVRDUDE]]. It supports a variety of downloading techniques: | ||
| + | * the [[Arduino]]-compatible serial loader already programmed into FLASH memory and some form of serial interface, such as the [[FT232R]] based USB-serial cables | ||
| + | * a [[Bus Pirate]] connected to the [[Atmel AVR]] 6-pin [[ICSP]] programming header | ||
| + | * | ||
| + | |||
| + | In the case of the [[AVR Stick]], we use an 8-pin Small Outline Integrated Circuit (SOIC) testclip connected to an ICSP programmer (such as [[Bus Pirate]]). | ||
| + | |||
| + | == See also == | ||
| + | * [[ICSP]] | ||
== External links == | == External links == | ||
| − | * [[ | + | * [https://ccrma.stanford.edu/workshops/pid2004/lectures/programming/programming/ How to Program the AVR with avr-gcc and AVRLib] |
| + | * [http://www.ladyada.net/learn/avr/index.html AVR Tutorial] at [http://www.ladyada.net/ LadaAda] | ||
| + | * [http://www.atmel.com/webdoc/AVRLibcReferenceManual/index.html AVR Libc Reference Manual] at atmel.com | ||
| + | * [http://www.makehackvoid.com/project/MHVLib MHVLib] - An Efficiency Oriented Runtime Library for AVR Microcontrollers | ||
Latest revision as of 21:03, 28 November 2016
The Atmel AVR micros are well supported in the FOSS world with complete development tool chains such as a C compiler, simulator, debugger, downloader etc.
We prefer to develop in C and use standard Unix command-line tools.
An alternative is to use the Arduino Integrated Development Environment (IDE), which runs on a Java Virtual Machine (JVM) and the coding style is C++ based.
Contents |
Support in Debian GNU/Linux and variants
The Atmel AVR "toolchains" have been available for Debian/Ubuntu Linux for some years. Specifically:
- binutils-avr - Binary utilities supporting Atmel's AVR targets
- gcc-avr - The GNU C compiler (cross compiler for avr)
- avr-libc - libc for AVR
- gdb-avr - The GNU Debugger for avr
- simulavr - Atmel AVR simulator
- AVRDUDE - software for programming Atmel AVR microcontrollers
All the other usual tools such as make, editors, version control etc. can be used as per any other development project.
Makefile template
A template Makefile:
PROJNAME = ...
DEVICE = atmega328p
CC = avr-gcc
INCS = -Iusbdrv -I.
CFLAGS = -Wall -Os $(INCS) -mmcu=$(DEVICE) -DDEBUG_LEVEL=0
AVRDUDE = avrdude -p $(DEVICE) -c arduino -P /dev/ftdi_cable1 -b 57600 -v
USBDRV_OBJS = usbdrv/usbdrv.o usbdrv/usbdrvasm.o usbdrv/oddebug.o
# symbolic targets:
all: $(PROJNAME).hex
.c.o:
$(CC) -c $(CFLAGS) $< -o $@
.S.o:
$(CC) -x assembler-with-cpp -c $(CFLAGS) $< -o $@
.c.s:
$(CC) -S $(CFLAGS) $< -o $@
%.bin: %.o $(USBDRV_OBJS)
$(CC) $(CFLAGS) -o $@ $< $(USBDRV_OBJS)
%.hex: %.bin
rm -f $@
avr-objcopy -j .text -j .data -O ihex $< $@
flash: all
$(AVRDUDE) -U flash:w:$(PROJNAME).hex
Downloading to target
The standard downloader for Linux is AVRDUDE. It supports a variety of downloading techniques:
- the Arduino-compatible serial loader already programmed into FLASH memory and some form of serial interface, such as the FT232R based USB-serial cables
- a Bus Pirate connected to the Atmel AVR 6-pin ICSP programming header
In the case of the AVR Stick, we use an 8-pin Small Outline Integrated Circuit (SOIC) testclip connected to an ICSP programmer (such as Bus Pirate).
See also
External links
- How to Program the AVR with avr-gcc and AVRLib
- AVR Tutorial at LadaAda
- AVR Libc Reference Manual at atmel.com
- MHVLib - An Efficiency Oriented Runtime Library for AVR Microcontrollers
