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Ttelmah
Joined: 11 Mar 2010
Posts: 19590
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 Posted: Mon Mar 14, 2016 8:03 am |
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Look at the code I pointed to.
You can't have the PWM in your main code. It needs to be done by a timer (tick) interrupt, if your main code is going to be able to do anything without interfering with the PWM. |
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baris_akinci
Joined: 10 Mar 2016
Posts: 17
Location: Ankara
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| pwm and normal output on same pin for 16f628a |
| Posted: Mon Mar 21, 2016 2:05 pm |
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With your advice, I tried to generate pwm by using timer1. Please check the following. Actually, this code works well in Proteus but in real, this does not work. I mean I can not control the pic and I just see LED flash once, then nothing!!
In order to be seen more clear, I deleted codes, typed sub-program instead.
| Code: | #include <16F628A.h>
#FUSES INTRC_IO, NOWDT, NOPUT, NOMCLR, NOBROWNOUT, NOLVP
#use fast_io(a)
#use fast_io(b)
#use delay(internal=4000000) // dahili osilatör ayarları
#use rs232(baud=2400,xmit=PIN_B2,rcv=PIN_B1,ERRORS) // RF haberleşme ayarları
#priority rda,ext,timer1 // rda yani haberleşme kesmesi önceliği, harici kesme ikinci öncelikte
#define LED1 pin_a0
#define LED2 pin_a1
#define LED3 pin_a2
#define LED4 pin_a3
#define KONTROL pin_b5
char c[10]; // senkronizasyon kontrolü dizini
char kapat[3]; // acma kapama dizini
int counter=1; // acma kapama değişkeni
int durum=0; // senkronizasyon sağlandımı değişkeni
int index = 0; // senkronizasyon sağlandımı dizini
int inc=0; // simulasyon dallanma değişkeni
int red_duty=63;
int Intcount=0;
#int_rda
void RDA_isr(void)
{
// rda sub-program
}
#int_timer1
void timer_pwm_isr(void)
{
set_timer1(65400);
if (Intcount < 255)
{
if (Intcount == red_duty)
{
output_low(LED1); output_low(LED2);output_low(LED3);output_low(LED4);
}
}
else if(Intcount == 255)
{
Intcount = 0;
output_high(LED1); output_high(LED2);output_high(LED3);output_high(LED4);
}
Intcount++;
}
#INT_EXT
void EXT_isr(void) // harici buton ile simulasyon değişimi yapılması fonksiyonu
{
// ext sub-program
}
void sim1() {
// simulation 1 sub-program
}
void sim2() {
// simulation 2 sub-program
}
void sim3() {
// simulation 3 sub-program
}
void sim4() {
// simulation 4 sub-program
}
void sim5() {
// simulation 5 sub-program
}
void main()
{
disable_interrupts(int_timer1);
enable_interrupts(int_rda); // rda kesmesi aktif ediliyor
enable_interrupts(INT_EXT); // harici kesme aktif ediliyor
enable_interrupts(GLOBAL); // rda kesmesinin geleceği bildiriliyor
set_timer1(65400);
set_tris_a(0b00010000);
set_tris_b(0b00000011);
while(TRUE)
{
if(inc==1) {
disable_interrupts(INT_TIMER1);
while(inc==1) {sim1();}
enable_interrupts(int_rda);
}
else if(inc==2) {
disable_interrupts(INT_TIMER1);
while (inc==2){sim2();}
enable_interrupts(int_rda);
}
else if(inc==3) {
disable_interrupts(INT_TIMER1);
while (inc==3){sim3();}
enable_interrupts(int_rda);
}
else if(inc==4) {
disable_interrupts(INT_TIMER1);
while (inc==4){sim4();}
enable_interrupts(int_rda);
}
else if(inc==5) {
while(inc==5) {
setup_timer_1(T1_INTERNAL | T1_DIV_BY_1);
enable_interrupts(INT_TIMER1);
enable_interrupts(GLOBAL); }
enable_interrupts(int_rda);
}
else if(inc==6) inc=1;
else if(inc==0) inc=5;
else if(inc==15) { disable_interrupts(INT_TIMER1);
output_low(LED1);output_low(LED2);output_low(LED3);output_low(LED4);
}
else inc=inc;
}
}
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