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56 lines
2.2 KiB
Plaintext
56 lines
2.2 KiB
Plaintext
SUMP compatible logic analyzer for Arduino
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==========================================
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This Arduino sketch implements a SUMP protocol compatible with the standard
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SUMP client as well as the alternative client from here:
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http://www.lxtreme.nl/ols/
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This SUMP protocol compatible logic analyzer for the Arduino board supports
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5 channels consisting of digital pins 8-12, which are the first 5 bits (0-4)
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of PORTB. Arduino pin 13 / bit 5 is the Arduino LED, bits 6 & 7 are the
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crystal oscillator pins.
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Uncomment CHAN5 below if you want to use the LED pin as an input and have
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6 channels.
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On the Arduino Mega board 8 channels are supported and 7k of samples.
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Pins 22-29 (Port A) are used by default, you can change the 'CHANPIN' below
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if something else works better for you.
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NOTE:
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If you are using the original SUMP client, or using the alternative client
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without the device profiles, then you will get a "device not found" error.
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You must DISABLE the Arduino auto reset feature to use this logic analyzer
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code. There are various methods to do this, some boards have a jumper,
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others require you to cut a trace. You may also install a *precisely*
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120 Ohm resistor between the reset & 5V piins. Make sure it is really
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120 Ohm or you may damage your board. It is much easier to use the
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alternative SUMP client referenced above.
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The device profiles should be included with this code. Copy them to the
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'plugins' directory of the client. The location varies depending on the
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platform, but on the mac it is here by default:
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/Applications/LogicSniffer.app/Contents/Resources/Java/plugins
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To use this with the original or alternative SUMP clients,
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use these settings:
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Sampling rate: 1MHz (or lower)
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Channel Groups: 0 (zero) only
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Recording Size:
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ATmega186: 532 (or lower)
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ATmega328: 1024 (or lower)
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ATmega2560: 7168 (or lower)
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Noise Filter: doesn't matter
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RLE: disabled (unchecked)
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Triggering is still a work in progress, but generally works for samples
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below 1MHz. 1MHz works for a basic busy wait trigger that doesn't store
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until after the trigger fires.
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Please try it out and report back.
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This master branch now supports Arduino 1.0 only.
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Checkout branch logic_analyzer_v0_5 for Arduino 22 support.
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Release: v0.06 November 4, 2011.
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