PWM control from USART

[filjoa]

hi

I try control PWM of an motor by a program on PC which send to USART values between 0 and 1023.

My question is, what is correct way to read from USART "read_usart" and apply value on PWM function?

[PCM programmer]

This post has an example. It calls get_long() to get the duty cycle.
http://www.ccsinfo.com/forum/viewtopic.php?t=31662&start=6
You don't need all the code for Timer0, and you don't need the code
to check kbhit() or the switch-case statement. Hopefully that's enough
to get you going.

[filjoa]

Hi

I try find in manual of CCS but not find get_long() function...

if for example I write on terminal "1000" and on my code I have "duty=get_long();" I only have "duty=1000" after send "\r"?

PS: I don't understand how get_long() function work to read from terminal diferents values like "10", "250", "1000", etc... it need an stop "bit" like "\r" correct?

best regards

[PCM programmer]

It's in the input.c file, below. You need to #include input.c above main().
Then you can call get_long() in your program.

[filjoa]

fine... now I understand, thanks PCM programmer

[filjoa]

hi

Now I try use ADC values [0-255] to move a SERVO between [0º-180º]. Is possible make this?

Is possible to adapt this way to make this?
http://www.ccsinfo.com/forum/viewtopic.php?t=34560&start=22


best regards

[PCM programmer]

You should try to do it.

[filjoa]

hi

with this function "servo.c" I can decide +- angle of I need my servo? for example 10º, 20º, 30º, etc?

someone know if this is possible?

best regards