Difference between revisions of "Arduino"
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When I got the Arduino Uno I did not know what it is. Here is how it looks: | When I got the Arduino Uno I did not know what it is. Here is how it looks: | ||
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The documentation just says "Thanks for supporting Arduino", that it is open-source, environmentally friendly and has limited warranty. | The documentation just says "Thanks for supporting Arduino", that it is open-source, environmentally friendly and has limited warranty. | ||
Latest revision as of 09:20, 2 February 2015
I got an Arduino Uno for my birthday. Documentation is poor, here I try to get it working.
Contents |
What it is
When I got the Arduino Uno I did not know what it is. Here is how it looks:
The documentation just says "Thanks for supporting Arduino", that it is open-source, environmentally friendly and has limited warranty.
SUSE Linux 12.1x64
- use a computer with SUSE Linux 12.1x64. If you do not have it, use a virtual machine.
- download the software
- unpack it
tar xvzf Downloads/arduino-1.0.1-linux64.tgz
- call arduino:
cd arduino-1.0.1/ ./arduino
- select file -> examples -> basics -> blink -> upload
- you see the LED on the Arduino blinking
FedOrA
trying with avrdude
- use a computer with FedOrA 16 x32. If you do not have it, use a virtual machine with a 20 GB harddisk
- connect the arduino to USB
- open a console
- enter
yum install uisp avr-binutils avr-gcc avr-libc yum install avrdude
- Now I try to erase the device, but it does not work:
avrdude -c stk500v2 -P /dev/ttyACM0 -e -p atmega128 avrdude: stk500_2_ReceiveMessage(): timeout avrdude: stk500_2_ReceiveMessage(): timeout
- maybe the -p atmega128 is wrong
trying with Arduino's software
- download the software
- install java from java.sun.com
- start the software:
./arduino
- select file -> examples -> basics -> blink -> upload
- get an error "port com1 not found"
- now as root it worx!
Traffic lights
Reading http://arduino.cc/en/Tutorial/Tone3 I get Arduino is for controlling attached electronics like speakers. So I get this board and make traffic lights.
Batch mode
Now I want my computer to control the traffic lights on my Arduino. So I need a way to upload information to my Arduino without the need for manual interaction. I call this the batch mode. Everything is done programmable over shell commands. The command so far does not work:
# avrdude -c stk500v2 -P /dev/ttyACM0 -e -p atmega128 avrdude: stk500_2_ReceiveMessage(): timeout
We know that the Arduino software is just a wrapper around avrdude, so I start the Arduino software and record its syscalls into a file:
strace ./arduino 2>file
then I look into the file to find out how avrdude has been called:
# cat file | grep avrdude [pid 10031] stat("/root/arduino-1.0.1/hardware/tools/avrdude", {st_mode=S_IFREG|0755, st_size=960618, ...}) = 0 [pid 10277] execve("/root/arduino-1.0.1/hardware/tools/avrdude", ["/root/arduino-1.0.1/hardware/too"..., "-C/root/arduino-1.0.1/hardware/t"..., "-q", "-q", "-patmega328p", "-carduino", "-P/dev/ttyACM0", "-b115200", "-D", "-Uflash:w:/tmp/build154763532118"...], [/* 102 vars */] <unfinished ...> [pid 10277] open("/root/arduino-1.0.1/hardware/tools/avrdude.conf", O_RDONLY) = 3 [pid 10277] read(3, "# $Id: avrdude.conf.in 991 2011-"..., 8192) = 8192 [pid 10277] stat("/root/.avrduderc", 0x7fff49f7faf0) = -1 ENOENT (No such file or directory)
Seems it has been call -carduino -patmega328p so I do the same and it works:
# avrdude -carduino -P/dev/ttyACM0 -e -p atmega328p
avrdude: AVR device initialized and ready to accept instructions
Reading | ################################################## | 100% 0.00s
avrdude: Device signature = 0x1e950f
avrdude: erasing chip
avrdude: safemode: Fuses OK
avrdude done. Thank you.
2012-06-08
with an LED I find out: GND corresponds to - on a battery, 3.3V is +3.3V.
Questions
- why do the LEDs have legs with a differing length?
- why does the thing (I guess it is a turnable resistor) not fit into the Arduino board?
- what is the name of the one board and the other board?
- why are the ports on the Arduino some labeled with a tilde ~ others not: RX0, TX1, 2, ~3, 4, ~5, ~6, 7, 8, ~9, ~10, ~11, 12, 13?
