PWM1L2//DAC1RN/RP13/RB13 dsPIC33fj128mc804

[EmbeddedKhan]

I am using this pin for simple led out put (LED blink) but it doesnt work the code is okay running debugging all ok but led remains off when i write configuration bit as
#pragma config LPOL = OFF
the led then remains on but blinking not occurs

 

[KlausST]

Hi,

re read your post and try to find out how we can help with the given informations.

--> Post your code and your schematic.

Klaus

 

[EmbeddedKhan]

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Code C - [expand]
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/*
 * File:   main.c
 * Author: EmbeddedKhan
 *
 * Created on March 14, 2017, 8:19 PM
 */
 
 
// DSPIC33FJ128MC804 Configuration Bit Settings
#include <p33FJ128MC804.h>
// 'C' source line config statements
#pragma config BWRP = WRPROTECT_OFF
#pragma config GWRP = OFF               //User program memory is not write-protected
#pragma config FNOSC = PRI              // Oscillator Mode (Primary Oscillator (XT, HS, EC) w/ PLL)
#pragma config POSCMD = HS             // Primary Oscillator Source (HS Oscillator Mode)
#pragma config OSCIOFNC = ON           // OSC2 Pin Function (OSC2 pin has clock out function)
#pragma config FCKSM = CSDCMD           // Clock Switching and Monitor (Both Clock Switching and Fail-Safe Clock Monitor are disabled)   
#pragma config IESO = OFF
#pragma config ICS = PGD3               // Comm Channel Select (Communicate on PGC1/EMUC1 and PGD1/EMUD1)
#pragma config JTAGEN = OFF
#pragma config FPWRT = PWR1
#pragma config FWDTEN = OFF//ON
#pragma config WDTPOST = PS1024
#pragma config WDTPRE = PR128
#pragma config LPOL = OFF
#pragma config IOL1WAY = ON
//#pragma config HPOL = ON
#pragma config PWMPIN = OFF
 
 
 
#define TestLED         LATBbits.LATB13
 
void Delay(unsigned int Time);
 
void Delay(unsigned int Time){
    unsigned int i,j;
    for(i = 0; i < 120; i++)
        for(j = 0; j < Time; j++);
        return;
}
void GPIOConfig(void){
  
    TRISB = 0;
    Nop();
    TestLED = 0;
    return;
}
int main(void) {
   TestLED = 0;
    
    GPIOConfig();
//    LATBbits.LATB13 = 1;
//    LATAbits.LATA7 = 1;
    while(1){
        Delay(100);
      TestLED = 1;
      Delay(1000);
      TestLED = 0;
      Delay(1000);
    }
    
    return 0;
}

---

 

[KlausST]

Hi,

Is it really a good idea to waste 100% of processing time only to blink a LED?

Why don´t you use hardware_PWM (takes 0% of processing time)
or blink using timer ISR (takes less than 1% processing time)

Klaus

BTW: what does a scope connected to the LED show?