MikroElektronika PIC Microcontrollers PIC16 Manuel d'utilisateur télécharger pdf (Page 153)

CCP (Capture/ Compare/ PWM) module is available with a number of PIC MCU

models. Set of library procedures and functions is listed below to provide comfort-

able work with PWM (Pulse Width Modulation).

Note that these routines support module on PORTC pin RC2, and won't work with

modules on other ports. Also, mikroBasic doesn't support enhanced PWM mod-

ules. Examples for PIC MCUs with module on other ports can be found in your

mikroBasic installation folder, subfolder 'examples'.

sub procedure PWM_Init(const PWM_Freq)

sub procedure PWM_Change_Duty(dim New_Duty as byte)

sub procedure PWM_start

sub procedure PWM_stop

procedure PWM_Init(const PWM_Freq);

Initializes the PWM module. It starts with (duty ratio) 0%.

Parameter PWM_Freq is a desired PWM frequency (refer to device data sheet for

correct values in respect with Fosc).

Example:

PWM_Init(5000);

sub procedure PWM_Change_Duty(dim New_Duty as byte)

Parameter New_Duty (duty ratio) takes values from 0 to 255, where 0 is 0% duty

ratio, 127 is 50% duty ratio, and 255 is 100% duty ratio. Other values for specific

duty ratio can be calculated as (Percent*255)/100.

sub procedure PWM_start

Starts PWM.

sub procedure PWM_stop

Stops PWM.

mikroBASIC

- Basic Compiler for Microchip PIC microcontrollers

148

mikroBASIC

MikroElektronika: Development tools - Books - Compilers

PWM Library

Note

Routines

making it simple...

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MikroElektronika PIC Microcontrollers PIC16 Manuel d'utilisateur Page 153