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PIC18f1230/1330 power pwm examples needed

 
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DaveCairns



Joined: 17 Feb 2009
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PIC18f1230/1330 power pwm examples needed
PostPosted: Fri Feb 20, 2009 8:05 am     Reply with quote
Hi
Can anyone help?

I am searching for any examples of CCS code related to setting up and using the power PWM feature in the PIC 18f1230/1330 devices.

I am beginning to think that I am the only person in the universe using (trying to) this device!
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Dave Cairns
Ttelmah
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PostPosted: Fri Feb 20, 2009 10:30 am     Reply with quote
Most of the stuff, is common to any chip with the ECCP.
So setup for example, as:
Code:
setup_timer_2(T2_DIV_BY_16,207,1);
 setup_ccp1(CCP_PWM_HALF_BRIDGE|CCP_SHUTDOWN_AC_L|CCP_SHUTDOWN_BD_L|CCP_PWM_H_H);

set_pwm1_duty(416L); //Should be 50% duty cycle

Gives half bridge operation, with 50:50 mark space.
However the one thing that seems to be missing from the compilers I have tried, is the dead time configuration. I just set this directly, with:
Code:
#byte PWM1CON = 0xFB7 
PWM1CON=0x81;   

For one cycle of deadband delay.

You are not alone in controlling this chip, but the other people have just looked at examples for other ECCP's, and the listing file, and then set whatever else they need by going DIY.

It'd 'help' if you said what you actually want to configure the PWM to do?.

Best Wishes
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