Difference between revisions of "Userspace Arduino"

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(Emulating the Arduino bootloader)
(ssh/scp/sftp)
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* A script will be needed to listen on a particular port on the BBB for any incoming connections which will receive, unzip and execute the code.
 
* A script will be needed to listen on a particular port on the BBB for any incoming connections which will receive, unzip and execute the code.
  
== ssh/scp/sftp ==
+
== ssh/sftp ==
 
 
* Needs authentication.
 
* scp/sftp is built over ssh i.e. they use ssh for authentication and copying
 
* To enter the password and execute the program after copying one will have to use a tool like expect (http://www.nist.gov/el/msid/expect.cfm)or sshpass (http://www.debianadmin.com/sshpass-non-interactive-ssh-password-authentication.html). Both of these tools usually don't ship with any Linux distribution.
 
* sshpass is slightly less complicated than expect. But some issues are there with using sshpass and sftp to upload the binary to the bone. Executing the binary encountered no issues.
 
* In case the user has set his own password and/or username, the IDE can contain a simple form to accept the same.
 
  
 +
* Needs ssh and sftp installed
 +
* Need to configure keys initially. Works without user authentication after that
 +
* Code to upload and execute binary here : https://github.com/anujdeshpande/send_exec
  
 
== Emulating the Arduino bootloader  ==
 
== Emulating the Arduino bootloader  ==

Revision as of 20:33, 20 May 2013

this page is to document some research on creating a userspace executable using the wiring and processing language used with Arduino.


Transfer Options

Netcat

  • GNU Netcat networking tool http://netcat.sourceforge.net/
  • Can create a connection using nc -w 1 192.168.7.2 1114 < new.zip on the server (in this case the machine running the Energia IDE), and nc -lp 1114 > n.zip on the Beaglebone. 1114 is a random port number which has to be the same on client as well as server side.
  • Some issue with sending .bin files directly. Mostly it was with how the file ends, not sure. So need to zip the file.
  • Requires no authentication
  • A script will be needed to listen on a particular port on the BBB for any incoming connections which will receive, unzip and execute the code.

ssh/sftp

Emulating the Arduino bootloader

  • The Arduino Bootloader uses a protocol similar to STK500v1 (over UART, though)
  • One way to program (copy) the binaries would be to emulate the protocol on the bone over USB gadget and use AVRDude on the IDE side
  • However this would be cumbersome, since the protocol was designed to write bytes to flash memory, not copy files. Energia uses msp430flasher to flash the MSP430 using an in-built (ROM or Flash based) Bootstarp Loader (BSL).
  • File transfer protocols over serial like XMODEM and ZMODEM could be explored for an easier and more compatible option to Upload the binaries.
  • Install the lrzsz package on both the host (PC) and the client (Beaglebone):
apt-get install lrzsz
  • Connect the Beaglebone via USB and determine the port (for e.g. /dev/ttyUSB1). Once the OS is booted up, start the transfer:
sz -vv -b filename.bin < /dev/ttyUSB1 > /dev/ttyUSB1