PulseIn() in questions

Forum 2005-2010 (read only) Software Syntax & Programs
#1

Hi everyone.

I read RC signal on 4 PINS 4,5,6,7 I read them by Pulsein() I store them as a value in value4, value5, value6, value7 I convert pulses onto degrees I write them by servo1.write(degrees4), servo2.write(degrees5) etc.

Problem is that : 1) The servo expects to see a pulse every 20 ms (.02 seconds). 2) During this time, the function is just waiting for theese pulses to get HIGH. If I am lucky, pulses commes sooner. 3) Reading pulses by Pulsein() for 4 PINS takes about 80ms of waiting for timout set for 20000.

Help me in following: 1) How to manage program to read RC pulses and don´t wait like Pulsein() does? I am also reading data on serial TX/RX. If I use interrupts, it interrupts every 20ms and I loose data on serial... How to handle serial reading and Pulsein() EASILY? Or just post any proposal.

Thanks for any post. Petr

#2

If you can get access to the composite signal from the receiver you can read the entire frame through a single pin using hardware in the Arduino chip to measure the pulses (no interrupts are required).

There is a thread that discusses this here: http://www.arduino.cc/cgi-bin/yabb2/YaBB.pl?num=1228137503

#3

Thank you for the link.

#4