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Calculators with Support of the 82240 IR-Printer
07-10-2014, 11:32 AM
Post: #32
RE: Calculators with Support of the 82240 IR-Printer
(07-09-2014 12:51 PM)Martin Hepperle Wrote:  In the meantime I have tested my code with a HP 48G and the WP 34S and the results are as expected...

There was a reason to implement the printer software on the 34S the way it is:
  1. Accurate timing increases the range, exspecially for a low power device as used by the 34S.
  2. Accurate timing is only available with a crystal. Hence the printer firmware is not available without the XTAL modification.
  3. The timing is mostly done with the help of hardware timers and interrupts. This is accurate and energy efficient because the CPU is not involved in timing.


The efforts obviously pay off in other applications, too, as your experiments show.

Marcus von Cube
Wehrheim, Germany
http://www.mvcsys.de
http://wp34s.sf.net
http://mvcsys.de/doc/basic-compare.html
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RE: Calculators with Support of the 82240 IR-Printer - Marcus von Cube - 07-10-2014 11:32 AM



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