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pwmsw.h

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/*! \file pwmsw.h \brief Software interrupt-driven multi-output PWM function library. */
//*****************************************************************************
//
// File Name    : 'pwmsw.h'
// Title        : Software interrupt-driven multi-output PWM function library
// Author       : Pascal Stang - Copyright (C) 2002
// Created      : 7/20/2002
// Revised      : 7/31/2002
// Version      : 0.1
// Target MCU   : Atmel AVR Series
// Editor Tabs  : 4
//
// This code is distributed under the GNU Public License
//      which can be found at http://www.gnu.org/licenses/gpl.txt
//
//*****************************************************************************

#ifndef PWMSW_H
#define PWMSW_H

#include "global.h"
#include "timer.h"

// constants/macros/typdefs
typedef struct struct_SwPwmChannel
{   
    u08 port;       ///< channel's hardware I/O port
    u08 pin;        ///< channel's hardware I/O pin
    u16 duty;       ///< active PWM duty setting
    u16 setduty;    ///< requested PWM duty setting
} SwPwmChannelType;

// number of PWM channels
#define SWPWM_NUM_CHANNELS      3
// define port 
#define SWPWMPORT               PORTB
#define SWPWMDDR                DDRB

// functions

//! initializes software PWM system
void pwmswInit(u16 periodTics);

//! turns off software PWM system
void pwmswOff(void);

//! set duty on channel
void pwmswPWMSet(u08 channel, u16 duty);

//! software PWM interrupt service routine
void pwmswService(void);

#endif

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