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lgeorge123
Joined: 05 Dec 2004
Posts: 31
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| c code of pic18f4431 not working |
 Posted: Sat Sep 13, 2008 8:54 am |
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I wrote a C code of pic18f4431 and compiled success. Turn on the power I only see the PWM1 has 5v. PWM0 has 0v. the code is as follows:
Can someone help me !!!
| Code: |
#include <18f4431.h>
#device ADC=8
#fuses HS,NOWDT,nolvp
#use delay (clock=20000000)
#use fast_io(A)
#use fast_io(B)
void main()
{
// setup_comparator(NC_NC_NC_NC);
//setup_vref(0);
set_tris_a(0b11111111); // A2-3 outputs
//set_tris_b(0b11010100); // B0-1,B3,B5 outputs
set_power_pwm_override(0, false, 1);
setup_power_pwm(PWM_CLOCK_DIV_4 | PWM_FREE_RUN |
PWM_DEAD_CLOCK_DIV_4,1,10000,1000,0,1,0);
setup_power_pwm_pins(PWM_COMPLEMENTARY ,PWM_OFF, PWM_OFF, PWM_OFF);
set_power_pwm0_duty(4000);
while(1);
} |
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PCM programmer
Joined: 06 Sep 2003
Posts: 21708
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| Posted: Sat Sep 13, 2008 11:38 am |
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Post your compiler version.
Unless somebody else helps you first, I can't work on this until tomorrow. |
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lgeorge123
Joined: 05 Dec 2004
Posts: 31
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| Posted: Sun Sep 14, 2008 3:45 am |
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| I use 4.074 version. |
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Ttelmah
Guest
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| Posted: Sun Sep 14, 2008 10:29 am |
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The override won't work. You have the PWM in 'complementary' mode. Look at the note in Figure 17-2 of the data sheet. remember that '0' is an 'even' number as far as channel numbers are concerned.
I think what is happening, is that the compiler is trying to handle this override, and is automatically applying it to channel one instead, which in complementary mode, results in PWM0=0 PWM1=1.
Best Wishes |
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