Using interrupts stops arduino being able to communicate via Serial

[Jaeyoung-Lim]

Serial decoding function works as well as the ppm generation/encoding function

but when I implement both, the code doesn't work

[Jaeyoung-Lim]

http://www.mftech.de/ppm_en.htm Reference for ppm signal information

shows ppm signal as a 22.5ms pulse with quite a long sync bit

[Jaeyoung-Lim]

http://forum.arduino.cc/index.php?topic=8755.0

link above includes code for generating ppm signals without using interrupts

[Jaeyoung-Lim]

Tested problem not using interrupts.

Signal is received in the transmitter, but signal is inconsistant and unstable. Indeed the problem is caused because of the slow reading of serial.

I think a few approaches could be possible to solve the problem a. shortening the message sent by serial b. using a faster MCU (such as arduino mega) c. schedule tasks more precisely so that won't interrupt each other

Other impressions are that using timers in arduino can be unrecommened. Arduino is good for simple newbie or prototyping applications. Time sensitive applications such as ppm signal generation does not seem to be a sufficeint application for arduino

[Jaeyoung-Lim]

http://forum.arduino.cc/index.php?topic=8755.30

The link inlcudes information of using a time correction factor in the ISR

[Jaeyoung-Lim]

Problem resolved using timer correction codes

Pin 10 should be used for timer interrupts

[Jaeyoung-Lim]

http://www.avrbeginners.net/architecture/timers/timers.html