PIC16F628A Need to Generate 38.3KHZ PWM Burst of 10ms for TSOP1838

asking · Sep 8, 2013

Hello

I am using MikroC Code for generating PWM signal Code is :-

Code:

void main()

{
     TRISB = 0;  // pins are output, GP3 always input
     PWM1_Init(38000);
     PWM1_Start();
     PWM1_Set_duty(120);
while(1){}

}

I got the 38.2KHZ signal of PWM on my CRO. I need Burst of 38.3KHZ signal with 10ms gap. How to generate it ? is it possible with one microcontroller or do i need to use external switch to on/off signal from MCU ? Please help me.

shihab_leo · Sep 8, 2013

hi
it's possible to do this with only microcontroller
you can try this

Code C - [expand]
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void main()
{
     TRISB = 0;  // pins are output, GP3 always input
     PWM1_Init(38000);
     PWM1_Set_duty(120);
     while(1)
     {
         PWM1_Start();
         Delay_ms(10);
         PWM1_Stop();
         Delay_ms(10);
     }
}

if you are doing other things too in the code, it probably is a good idea to move the PWM part in timer interrupts

asking · Sep 8, 2013

Thanks it worked

PIC16F628A Need to Generate 38.3KHZ PWM Burst of 10ms for TSOP1838

asking

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shihab_leo

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asking

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Code C - [expand]
1 2 3 4 5 6 7 8 9 10 11 12 13	void main() { TRISB = 0; // pins are output, GP3 always input PWM1_Init(38000); PWM1_Set_duty(120); while(1) { PWM1_Start(); Delay_ms(10); PWM1_Stop(); Delay_ms(10); } }

PIC16F628A Need to Generate 38.3KHZ PWM Burst of 10ms for TSOP1838

asking

Full Member level 5

shihab_leo

Member level 1

asking

Full Member level 5

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