[PIC] Switch from 877A to 887 > PWM > open source

[Eric_O]

Chers programmeurs,
My 16F877 failed. I replaced it with 16F887 on the labdeck because I had in spare parts.
In order to save time do some body have the routines PWM_init() and PWM_setdutycycle(unsigned int dutycycle) in open source MikroC ?
While waiting, I try to use datasheets.
Merci beaucoup !

 

[paulfjujo]

Hello Eric,

PWM_setdutycycle(unsigned int dutycycle) means you are looking for 10 bits mode ?
else dutycycle is only with 8 bits 0 to 255

this example for 18F26K22 , 10 bits dutycycle

Print_Cte_String(" Init PWM1 10bits at 1000Hz on RC2 \r\n");

     TRISC2_bit = 1; //set TRIS bit
   // CCPTMRS0: PWM TIMER SELECTION CONTROL REGISTER
    CCPTMRS0 = 0x00; //select timer resources, Timer2 for CCP1 and all others, page 208
    PR2 = 0xff; // load with PWM period value (fixed at 1 kHz at 16Mhz)
    //CCPxCON
    // bit 7-6 PxM<1:0>: Enhanced PWM Output Configuration bits
    //00 = Single output; PxA modulated; PxB, PxC, PxD assigned as port pins
    // bit 5-4 DCxB<1:0>: PWM Duty Cycle Least Significant bits
    //Half-Bridge ECCP Modules(1):
    //1100 = PWM mode: PxA active-high; PxB active-high
    CCP1CON = 0b00001100; // setup for PWM mode 5:4 are PWM Duty Cycle LSB
    CCPR1L = 0x00; // eight high bits of duty cycle
 //   T2CON = 0b00000101; // Timer2 On, 1:1 Post, 4x prescale at 8MHz
 // PWM at 1KHz
    T2CON = 0b00000110; // Timer2 On, 1:1 Post, 16x prescale  at 16MHz
  //   T2CKPS1_bit=1;// Timer2-type Clock Prescale Select bits  =1/16
  //  T2CKPS0_bit=1
    TRISC2_bit = 0;
    IRatio=0;
    CCP1CON.DC1B0 = IRatio & 1; //set low bit
    CCP1CON.DC1B1 = (IRatio >> 1) & 1;  //set second lowest
    CCPR1L = (IRatio >> 2); //set highest eight
  CRLF1();

// test cde PWM via clavier terminal
   // mode pooling SANS interrupt

   RCIE_bit=0;
   txt=&TEXTE[0];
   Print_Cte_String(" Entrer la consigne PWM via le clavier : valeur  0 à 1023  + terminaison <CR> \r\n");
   while(1) // do forever
    {
    if (UART1_Data_Ready())
     {
      UART1_Read_Text(txt,"\r",5);
      UART1_Write_Text(txt);
      CRLF();
      IRatio=atoi(txt);
      PWM1_Set_10b_Duty(IRatio);
      }
     txt=&TEXTE[0];
}

 

[ZASto]

You will NEVER find source for MicroC libraries.
I spoke many times with ME owner and he says that there is no plan to open source for libraries. (dickhead)