PWM by software

[murassus]

Posted on April 01, 2004 at 22:26

PWM by software

[murassus]

Posted on April 01, 2004 at 05:36

First of all, I'm sorry for my poor english.

I seek your understanding for that. ======================================= I'm using Cosmic C , Indart-stx and ST72F5 I want to make 6 idependent PWM signals for 60seconds by a software. (ex. Port E2 On : 50msec & Off : 0msec Port E3 On : 50msec & Off : 10msec Port E4 On : 50msec & Off : 20msec Port E5 On : 50msec & Off : 40msec Port E6 On : 50msec & Off : 60msec Port E7 On : 50msec & Off : 80msec Can it be made by programing function? If it can be fullfilled, Would anybody teach me that? Would do so, I will be oblieged to you. Help~ [ This message was edited by: musu on 01-04-2004 09:09 ]

[marco32]

Posted on April 01, 2004 at 06:12

Hello Musu,

You can make a software PWM output Make a (by example) 5mS timer on interrupt For each PWM output a 'Output on' counter Every timer interrupt you check the 'Output on' counter and decrease it. Counter zero? PWM output to '0' After 60mS all PWM output to '1' and relaos the 'Output On' counter I hope it will be clear? Also my english is not very good Succes, Moppie

[jatin]

Posted on April 01, 2004 at 08:25

Yes, you can manage it by using the timer interrupt e.g 10 msec as in your case the minimum time period is 10 msec(OFF time). You can maintain a count for each PWM and modify each PWM o/p at the desired count.

[murassus]

Posted on April 01, 2004 at 22:26

Sir. moppie.

These days I'm watching the movie ''Band of brothers.'' In it, at sixth chapter, I saw your netherland's country town. It was looks like a Lego block town. Untill now, Is the landscape of town same with the present? (Is that town scene same with present's one?) If it is so, then you are very lucky man. It is so blessed I think, that you are living in such a beautiful town. In korea, most of residing type is a Apartment. It's very dry as dust.(boring & uninteresting) ========================================== And I thank you both for the very cool answer. Have a nice day. =============================================== [ This message was edited by: Jatin on 02-04-2004 08:56 ]