readme.txt

利用89C51实现简易示波器的功能

LoLA is a very low-cost 8-bit logic-analyzer
based on the Atmel AT90S1200 microcontroller.

Update v0.23: 
  BUG fixed: Timing parameters were saved in DAT-Files
  but not updated when file was reloaded. Sorry!


In timing-mode data is recorded by internal clockrates
from 2us to 16ms per sample or by an external clock on
rising or falling edge.

The triggercondition can be specified by an internal
triggerword (bits set to high, low or don't care) or by
an external trigger on rising or falling edge.

In state-mode every change on the input-channels is
stored in memory. Data can be captured nearly every 1,2us.
This means, a signal about 400kHz (with 50% duty-cycle)
is recorded without problems.

The LoLA.EXE program commands the controller and shows
the recorded data in a timing-diagram.
The analyzer can handle the recorded data from an I2C-
Bus communication or a LC-Display in 4-bit-mode.


Sample-Datafiles:

I2CTEST.DAT  is an I2C-communication recorded in timing-
             mode.
SAA1064D.DAT is an I2C-communication recorded in state-
             mode. 
             Both can be handled by the I2C-Analyzer.

LCD.DAT      is the captured data (state-mode) from a 
             LC-Display, it can also be analyzed.

WZERO.DAT    is a testpattern, generated by the 90S1200-
             controller.

The Picture-Files:
             These files show screenshots from LoLA.EXE.