Hi all,
PIC18F2550, 28pin PIC device has only the PWM implemented, the enhanced PWM
is available on 40/44pin devices only. However, If I want on a 28pin PIC
two PWMs running at the same frequency, with the same duty-cycle, how can I
generate one active high and one active low PWM signals without
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Branch: refs/heads/master
Home: https://github.com/jallib/jallib
Commit: 0df2bcea7b98ca54a5dfd3717826e041e448e729
https://github.com/jallib/jallib/commit/0df2bcea7b98ca54a5dfd3717826e041e448e729
Author: Rob Jansen <12682653+robjanse...@users.noreply.github.com>
Date:
Hi Vasile,
Not sure if I understood you correctly. If you want the PWM signals to be
exactly the same but only inverted you can use the bridge mode for one of the
PWM's that is when one output goes high the other goes low.
[cid:f064cb34-c8c2-4246-8deb-3145f912d8ce]
Kind regards,
Rob
Hi!
Well... almost all 28pin? Chips with suffixes like k20, k22, k50, k80, j11,
j13, j50 and j80 do have ECCP, chips with suffixes like q40, q41, q43, q83,
q84, k42, k83 and numerous more have CWG and/or CLC modules, which both allow
the generation of those signals using a simple PWM.
With
Thx Rob, the bridge mode (enhanced CCP) works only for a 40 pin device, I
have a 28 pin device on my board. Enhanced CCP is available only on large
size microcontroller. :( Almost all 28 pin microcontrollers suffer from
this issue (PIC18F25k50, etc.)
Since I need two signals with opposite
Hi Kiste, as far as I read my version of k50 (PIC18F25k50) does not have
ECCP it in 28 pin, I have to stick on my available stock of
microcontrollers during the inexistence at this point (Farnell, TME) of too
many options to buy immediately PIC microcontrollers.
Thanks for your solution, I think I
Kiste, thanks for opening my eyes, PIC18F25k50 will do my job, it has
indeed the ECCP, I didn't read correctly the notes 4 and 5 at pin
descriptions. Thank you again.
On Mon, Aug 2, 2021 at 8:36 AM vsurducan wrote:
> Hi Kiste, as far as I read my version of k50 (PIC18F25k50) does not have
>
Hi,
if I download the datasheet (PIC18F2X_45K50-3684B.pdf), it says the chip
has one ECCP and one CCP module. The output of CCP2, the simple one, is on pin
12 (pin 9 on QFN package) and can be relocated to pin 24 (pin 21 on QFN). The
outputs A,B,C and D of CCP1 are on pins 13, 23, 22 and
You're very welcome :-)
I want to correct myself about interrupts and jitter: I wrote about +/-2Tcy.
That's the hardware part. But then there's JALs interrupt handling: If, say,
serial_hw_int_cts is transmitting a string and has just finished one byte
shortly before the timer overflows,
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