PIC16F1705 PWM not working for all channel

[tcm1986]

When i compile the it give a warning message "1705 pwm test.c: 226: (1257) local variable "_FCR_RETVAL" is used but never given a value (warning)
"
The PWM have no output signal at all. The code is very simple, just enable PWM and assign duty cycle 125 for testing and yet it have still no output

Thanks in advance.

[medelec35]

Hi
Have tried a one-second flasher to make sure your hardware is running at the correct speed?
Can you also post your flowchart and generated C code from your project folder?

[tcm1986]

Hi Mededec35,

Thanks for the reply.
We have a code Pic16f1825 previously, however this chip is shortage in singapore.
So we switch to PIC15F1705 but the PWM do not give us any output.
I will have make a short code just to test the PWM output which give the same error.

Please download the file from this link
PIC 1705 PWM Testing:
http://gofile.me/2zi03/CZskpmqYK

Thanks in advance

[medelec35]

The only things I have noticed it PLL and low voltage programming are enabled.
You have not stated if tried the one-second flasher?
Was the timing spot on?

I will have make a short code just to test the PWM output which give the same error.

I did not get any errors or warnings, neither did you looking at your

Code: Select all

PIC16F1705 PWM Testing.msg.txt

[tcm1986]

Hi thanks for the quick reply.
We have tested the 1 sec flash, the flash is spot on.
I had attached a video in the previous link which shows 1 red led and 2 yellow leds.
The red LED is the 1 second flasher while the Yellow led is connected PWM channel 1 and channel 2.
From the video, you can see there's no output to both Yellow led.
Thanks!

[Benj]

Hello,

Thanks for letting us know I've made some changes to the definition file and pushed them to the update system.

Let us know if this makes a difference for you.

[tcm1986]

Hi Ben J,

Thanks for the update. it worked for us!.

Thanks very much