10-Bit PWM using PIC16F1509

[richard]

its fairly easy to get 3 different pwm streams from one ccpm module , you just to need to
1. set pulse width for channel
2. set pin steering to channel pin
in a sequentially multiplexed routine
eg

/**
  Generated Main Source File


        Device            :  PIC16F1825
        Driver Version    :  2.00
 */


int pwmv[3];
char cnt = 0;
void ticker(void);




#include "mcc_generated_files/mcc.h"


/*
                         Main application
 */
void main(void) {
    // initialize the device
    SYSTEM_Initialize();
    TMR1_SetInterruptHandler(ticker);
    // When using interrupts, you need to set the Global and Peripheral Interrupt Enable bits
    // Use the following macros to:
    PSTR1CON = 0x10;
    // Enable the Global Interrupts
    INTERRUPT_GlobalInterruptEnable();


    // Enable the Peripheral Interrupts
    INTERRUPT_PeripheralInterruptEnable();


    // Disable the Global Interrupts
    //INTERRUPT_GlobalInterruptDisable();


    // Disable the Peripheral Interrupts
    //INTERRUPT_PeripheralInterruptDisable();


    while (1) {
        pwmv[cnt] = ADC_GetConversion(cnt);
        __delay_ms(300);
        cnt++;
        cnt &= 3;
        // Add your application code
    }
}


void ticker(void) {
    static char inx = 0;
    CCPR1L = pwmv[inx] >>8;
    CCP1CON = ((pwmv[inx]&0xc0)>>2) | 0xC;
    PSTR1CON = 0x10 | (2 << inx);
    inx++;
    inx &= 3;
}

this sort of led modulation is exactly how those p10 led modules work

[Ioannis]

Hi Richard. Thanks for posting this. I was not aware this was possible.

But, doesn't this have glitches in the signal when steering is changing channel?

Have to try this in real hardware.

Ioannis