OpenModem/bertos/cpu/arm/drv/pwm_at91.h
2014-04-03 22:21:37 +02:00

104 lines
3.0 KiB
C

/**
* \file
* <!--
* This file is part of BeRTOS.
*
* Bertos is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*
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* templates or use macros or inline functions from this file, or you compile
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* file does not by itself cause the resulting executable to be covered by
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* invalidate any other reasons why the executable file might be covered by
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* Copyright 2008 Develer S.r.l. (http://www.develer.com/)
*
* -->
*
*
* \brief PWM hardware-specific definition
*
*
* \author Daniele Basile <asterix@develer.com>
*/
#ifndef DRV_PWM_AT91_H
#define DRV_PWM_AT91_H
#include <cfg/compiler.h>
#include <cfg/macros.h>
#include "cfg/cfg_pwm.h"
#include <io/arm.h>
#if CFG_PWM_ENABLE_OLD_API
#include "hw/pwm_map.h"
/**
* Type definition for pwm period.
*/
typedef uint16_t pwm_period_t;
/**
* Structur definition for pwm driver.
*/
typedef struct PwmChannel
{
bool duty_zero; ///< True if duty cyle is zero, false otherwise.
bool pol; ///< PWM polarty flag.
int pwm_pin; ///< PWM pin.
reg32_t *mode_reg; ///< PWM mode register.
reg32_t *duty_reg; ///< PWM duty cycle register.
reg32_t *period_reg; ///< PWM periodic register.
reg32_t *update_reg; ///< Update setting register for PWM.
} PwmChannel;
void pwm_hw_init(void);
void pwm_hw_setFrequency(PwmDev dev, uint32_t freq);
void pwm_hw_setDutyUnlock(PwmDev dev, uint16_t duty);
void pwm_hw_disable(PwmDev dev);
void pwm_hw_enable(PwmDev dev);
void pwm_hw_setPolarity(PwmDev dev, bool pol);
pwm_period_t pwm_hw_getPeriod(PwmDev dev);
#else
#include <drv/pwm.h>
typedef uint16_t pwm_hwreg_t;
struct PwmChannelRegs; //fwd decl
typedef struct PwmHardware
{
uint32_t pwm_pin; ///< PWM pin.
volatile struct PwmChannelRegs *base;
} PwmHardware;
pwm_hwreg_t pwm_hw_getPeriod(Pwm *ctx);
void pwm_hw_setFrequency(struct Pwm *ctx, pwm_freq_t freq);
void pwm_hw_setDuty(Pwm *ctx, pwm_hwreg_t duty);
void pwm_hw_init(struct Pwm *ctx, unsigned ch);
#endif
#endif /* DRV_ADC_AT91_H */