Difference between revisions of "Arduino"

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** https://sigrok.org/wiki/Openbench_Logic_Sniffer
** https://sigrok.org/wiki/Openbench_Logic_Sniffer
** http://dangerousprototypes.com/docs/The_Logic_Sniffer%27s_extended_SUMP_protocol
** http://dangerousprototypes.com/docs/The_Logic_Sniffer%27s_extended_SUMP_protocol
== Problems ==
* Buffer is currently sent or parsed backwards (time goes from right to left/zero)!!!
* RLE (=continuous capture) is not properly implemented in sigrok/ols driver, therefore capture length is limited by device memory
* Maximum supported samplerate is reported by device and received by sigrok, but not reflected in pulseview GUI
* Triggering is still a work in progress, but generally works for samples below 1MHz. over 1MHz works for a basic busy wait trigger that doesn't store until after the trigger fires.


== Resources ==
== Resources ==

Revision as of 13:25, 30 June 2019

Arduino
Arduino Uno-R3.jpg
Status in progress
Source code ols
Channels 6
Samplerate 4MHz
Samplerate (state)
Triggers none (SW-only)
Min/max voltage -0.5V — 5.5V
Threshold voltage Fixed: VIH=3.0V—5V, VIL=0V—1.5V
Memory ATmega168: 532 (or lower), ATmega328: 1024 (or lower), ATmega2560: 7168 (or lower)
Compression RLE
Website github.com

SUMP protocol implementation for Arduino.

Hardware

  • Main chip: Atmel ATmega168/328/2560
  • Input pins: With optional internal pullups (currently has to be modified at compile-time)
  • 3.3V and 5V output: 3.3V, 5V
  • 16MHz crystal: 16.000

Note that some older arduino designs and arduino clones feature FTDI usb-serial chip, which might be used as logic analyzer as well: FTDI-LA

Photos

Protocol

Problems

  • Buffer is currently sent or parsed backwards (time goes from right to left/zero)!!!
  • RLE (=continuous capture) is not properly implemented in sigrok/ols driver, therefore capture length is limited by device memory
  • Maximum supported samplerate is reported by device and received by sigrok, but not reflected in pulseview GUI
  • Triggering is still a work in progress, but generally works for samples below 1MHz. over 1MHz works for a basic busy wait trigger that doesn't store until after the trigger fires.

Resources