RCTime question...

Archiver

Hi all! I am using RCtime to scan 9 I/O lines (each attached to a CdS
cell/capacitor combo). I understand the I/O lines to be grouped in two buses
of 8 I/O lines each, so 1 of the lines that I will be using will be on the
second bus. OK, enough of that... The time in which the Stamp can cycle
through all 9 lines is a major issue, so... (My Question)... Will the one
line being on a separate bus cause an extra delay in the execution time? If
so, by how much? Also, in addition to the charge/discharge time of the
capacitor, how long does it take to execute a single RCtime command? How long
in-between RCtime commands?



Thanks in advance,
Edward Kindler

Archiver

>Hi all! I am using RCtime to scan 9 I/O lines (each attached to a CdS
>cell/capacitor combo). I understand the I/O lines to be grouped in two
buses
>of 8 I/O lines each, so 1 of the lines that I will be using will be on the

>second bus. OK, enough of that... The time in which the Stamp can cycle
>through all 9 lines is a major issue, so... (My Question)... Will the one
>line being on a separate bus cause an extra delay in the execution time?
If
>so, by how much? Also, in addition to the charge/discharge time of the
>capacitor, how long does it take to execute a single RCtime command? How
long
>in-between RCtime commands?

It takes 220 microseconds in between each RCtime command. Plus the time
for the command itself, in 2 microsecond units. To make the execution as
fast as possible, make the capacitor as smallas possible consistent with
the resolution you need for your application. The 9 lines all work the
same for RCtime--it doesn't matter which pins you use.

-- Tracy Allen
Electronically Monitored Ecosystems
http://www.emesystems.com