CCS C Software and Maintenance Offers
FAQFAQ   FAQForum Help   FAQOfficial CCS Support   SearchSearch  RegisterRegister 

ProfileProfile   Log in to check your private messagesLog in to check your private messages   Log inLog in 

CCS does not monitor this forum on a regular basis.

Please do not post bug reports on this forum. Send them to support@ccsinfo.com

Trying to generat 2 PWM in port C using PIC18F2431

 
Post new topic   Reply to topic    CCS Forum Index -> General CCS C Discussion
View previous topic :: View next topic  
Author Message
sonicdeejay



Joined: 20 Dec 2005
Posts: 112

View user's profile Send private message

Trying to generat 2 PWM in port C using PIC18F2431
PostPosted: Thu Jan 12, 2006 6:28 am     Reply with quote

My code is as followed....

and I can't measure any square wave in my oscilloscope,,,



#include <18F2331.h>
#device adc=8 //Where x is the number of bits read_adc() should return
#use delay(clock = 4000000)
//#use delay(clock=20000000)
#fuses XT,NOWDT,WDT128,HS, NOPROTECT, IESO, BROWNOUT, BORV27, NOPUT, NOCPD, STVREN, NODEBUG, LVP, NOWRT, NOWRTD, FCMEN, NOWINEN, T1LOWPOWER, HPOL_HIGH, NOWRTC, NOWRTB, NOEBTR, NOEBTRB, NOCPB, LPOL_HIGH, PWMPIN, NOMCLR, FLTAC1, SSP_RC


void main()
{

//setup_adc_ports(NO_ANALOGS|VSS_VDD);

setup_adc(ADC_OFF|ADC_TAD_MUL_0);

setup_spi(FALSE);

setup_wdt(WDT_ON);

setup_timer_0(RTCC_INTERNAL);

setup_timer_1(T1_DISABLED);

setup_timer_2(T2_DISABLED,0,1);

SET_TRIS_A( 0x0F ); //Declare as Output

//setup_adc_ports( RA0_ANALOG );
//setup_adc( ADC_CLOCK_INTERNAL );
//set_adc_channel( 0 );

//int i, value, min, max;
while(1)
{

output_high(PIN_A0);
delay_ms(1000);
output_low(PIN_A0);
delay_ms(1000);
output_high(PIN_A0);
delay_ms(500);
output_low(PIN_A0);
delay_ms(500);


//PWM test Drive
output_low(PIN_C1); // Set CCP2 output low
output_low(PIN_C2); // Set CCP1 output low

setup_ccp1(CCP_PWM); // Configure CCP1 as a PWM
setup_ccp2(CCP_PWM); // Configure CCP2 as a PWM

setup_timer_2(T2_DIV_BY_16, 124, 1); // 500 Hz
set_pwm1_duty(31); // 25% duty cycle on pin C2
set_pwm2_duty(62); // 50% duty cycle on pin C1



}
PCM programmer



Joined: 06 Sep 2003
Posts: 21708

View user's profile Send private message

PostPosted: Thu Jan 12, 2006 1:37 pm     Reply with quote

Make the changes shown in bold below:

Quote:
#fuses XT,NOWDT,WDT128,HS, NOPROTECT, IESO, BROWNOUT, BORV27, NOPUT, NOCPD, STVREN, NODEBUG, NOLVP, NOWRT, NOWRTD, FCMEN, NOWINEN, T1LOWPOWER, HPOL_HIGH, NOWRTC, NOWRTB, NOEBTR, NOEBTRB, NOCPB, LPOL_HIGH, PWMPIN, NOMCLR, FLTAC1, SSP_RC


Quote:
void main()
{

//setup_adc_ports(NO_ANALOGS|VSS_VDD);
setup_adc(ADC_OFF|ADC_TAD_MUL_0);
setup_spi(FALSE);
setup_wdt(WDT_ON);
setup_timer_0(RTCC_INTERNAL);
setup_timer_1(T1_DISABLED);
setup_timer_2(T2_DISABLED,0,1);
SET_TRIS_A( 0x0F ); //Declare as Output

//setup_adc_ports( RA0_ANALOG );
//setup_adc( ADC_CLOCK_INTERNAL );
//set_adc_channel( 0 );
//int i, value, min, max;

// while(1) // Comment out these two lines.
//{

output_high(PIN_A0);
delay_ms(1000);
output_low(PIN_A0);
delay_ms(1000);
output_high(PIN_A0);
delay_ms(500);
output_low(PIN_A0);
delay_ms(500);

//PWM test Drive
output_low(PIN_C1); // Set CCP2 output low
output_low(PIN_C2); // Set CCP1 output low

setup_ccp1(CCP_PWM); // Configure CCP1 as a PWM
setup_ccp2(CCP_PWM); // Configure CCP2 as a PWM

setup_timer_2(T2_DIV_BY_16, 124, 1); // 500 Hz
set_pwm1_duty(31); // 25% duty cycle on pin C2
set_pwm2_duty(62); // 50% duty cycle on pin C1


while(1); // Add this line
}
Display posts from previous:   
Post new topic   Reply to topic    CCS Forum Index -> General CCS C Discussion All times are GMT - 6 Hours
Page 1 of 1

 
Jump to:  
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum


Powered by phpBB © 2001, 2005 phpBB Group