mirror of
https://github.com/eried/portapack-mayhem.git
synced 2024-12-15 10:44:34 -05:00
260 lines
9.4 KiB
C
Executable File
260 lines
9.4 KiB
C
Executable File
/*
|
|
ChibiOS/RT - Copyright (C) 2006,2007,2008,2009,2010,
|
|
2011,2012,2013 Giovanni Di Sirio.
|
|
|
|
This file is part of ChibiOS/RT.
|
|
|
|
ChibiOS/RT 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 3 of the License, or
|
|
(at your option) any later version.
|
|
|
|
ChibiOS/RT is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
GNU General Public License for more details.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
|
|
---
|
|
|
|
A special exception to the GPL can be applied should you wish to distribute
|
|
a combined work that includes ChibiOS/RT, without being obliged to provide
|
|
the source code for any proprietary components. See the file exception.txt
|
|
for full details of how and when the exception can be applied.
|
|
*/
|
|
|
|
/**
|
|
* @file pwm.h
|
|
* @brief PWM Driver macros and structures.
|
|
*
|
|
* @addtogroup PWM
|
|
* @{
|
|
*/
|
|
|
|
#ifndef _PWM_H_
|
|
#define _PWM_H_
|
|
|
|
#if HAL_USE_PWM || defined(__DOXYGEN__)
|
|
|
|
/*===========================================================================*/
|
|
/* Driver constants. */
|
|
/*===========================================================================*/
|
|
|
|
/**
|
|
* @name PWM output mode macros
|
|
* @{
|
|
*/
|
|
/**
|
|
* @brief Standard output modes mask.
|
|
*/
|
|
#define PWM_OUTPUT_MASK 0x0F
|
|
|
|
/**
|
|
* @brief Output not driven, callback only.
|
|
*/
|
|
#define PWM_OUTPUT_DISABLED 0x00
|
|
|
|
/**
|
|
* @brief Positive PWM logic, active is logic level one.
|
|
*/
|
|
#define PWM_OUTPUT_ACTIVE_HIGH 0x01
|
|
|
|
/**
|
|
* @brief Inverse PWM logic, active is logic level zero.
|
|
*/
|
|
#define PWM_OUTPUT_ACTIVE_LOW 0x02
|
|
/** @} */
|
|
|
|
/*===========================================================================*/
|
|
/* Driver pre-compile time settings. */
|
|
/*===========================================================================*/
|
|
|
|
/*===========================================================================*/
|
|
/* Derived constants and error checks. */
|
|
/*===========================================================================*/
|
|
|
|
/*===========================================================================*/
|
|
/* Driver data structures and types. */
|
|
/*===========================================================================*/
|
|
|
|
/**
|
|
* @brief Driver state machine possible states.
|
|
*/
|
|
typedef enum {
|
|
PWM_UNINIT = 0, /**< Not initialized. */
|
|
PWM_STOP = 1, /**< Stopped. */
|
|
PWM_READY = 2, /**< Ready. */
|
|
} pwmstate_t;
|
|
|
|
/**
|
|
* @brief Type of a structure representing a PWM driver.
|
|
*/
|
|
typedef struct PWMDriver PWMDriver;
|
|
|
|
/**
|
|
* @brief PWM notification callback type.
|
|
*
|
|
* @param[in] pwmp pointer to a @p PWMDriver object
|
|
*/
|
|
typedef void (*pwmcallback_t)(PWMDriver *pwmp);
|
|
|
|
#include "pwm_lld.h"
|
|
|
|
/*===========================================================================*/
|
|
/* Driver macros. */
|
|
/*===========================================================================*/
|
|
|
|
/**
|
|
* @name PWM duty cycle conversion
|
|
* @{
|
|
*/
|
|
/**
|
|
* @brief Converts from fraction to pulse width.
|
|
* @note Be careful with rounding errors, this is integer math not magic.
|
|
* You can specify tenths of thousandth but make sure you have the
|
|
* proper hardware resolution by carefully choosing the clock source
|
|
* and prescaler settings, see @p PWM_COMPUTE_PSC.
|
|
*
|
|
* @param[in] pwmp pointer to a @p PWMDriver object
|
|
* @param[in] denominator denominator of the fraction
|
|
* @param[in] numerator numerator of the fraction
|
|
* @return The pulse width to be passed to @p pwmEnableChannel().
|
|
*
|
|
* @api
|
|
*/
|
|
#define PWM_FRACTION_TO_WIDTH(pwmp, denominator, numerator) \
|
|
((pwmcnt_t)((((pwmcnt_t)(pwmp)->period) * \
|
|
(pwmcnt_t)(numerator)) / (pwmcnt_t)(denominator)))
|
|
|
|
/**
|
|
* @brief Converts from degrees to pulse width.
|
|
* @note Be careful with rounding errors, this is integer math not magic.
|
|
* You can specify hundredths of degrees but make sure you have the
|
|
* proper hardware resolution by carefully choosing the clock source
|
|
* and prescaler settings, see @p PWM_COMPUTE_PSC.
|
|
*
|
|
* @param[in] pwmp pointer to a @p PWMDriver object
|
|
* @param[in] degrees degrees as an integer between 0 and 36000
|
|
* @return The pulse width to be passed to @p pwmEnableChannel().
|
|
*
|
|
* @api
|
|
*/
|
|
#define PWM_DEGREES_TO_WIDTH(pwmp, degrees) \
|
|
PWM_FRACTION_TO_WIDTH(pwmp, 36000, degrees)
|
|
|
|
/**
|
|
* @brief Converts from percentage to pulse width.
|
|
* @note Be careful with rounding errors, this is integer math not magic.
|
|
* You can specify tenths of thousandth but make sure you have the
|
|
* proper hardware resolution by carefully choosing the clock source
|
|
* and prescaler settings, see @p PWM_COMPUTE_PSC.
|
|
*
|
|
* @param[in] pwmp pointer to a @p PWMDriver object
|
|
* @param[in] percentage percentage as an integer between 0 and 10000
|
|
* @return The pulse width to be passed to @p pwmEnableChannel().
|
|
*
|
|
* @api
|
|
*/
|
|
#define PWM_PERCENTAGE_TO_WIDTH(pwmp, percentage) \
|
|
PWM_FRACTION_TO_WIDTH(pwmp, 10000, percentage)
|
|
/** @} */
|
|
|
|
/**
|
|
* @name Macro Functions
|
|
* @{
|
|
*/
|
|
/**
|
|
* @brief Changes the period the PWM peripheral.
|
|
* @details This function changes the period of a PWM unit that has already
|
|
* been activated using @p pwmStart().
|
|
* @pre The PWM unit must have been activated using @p pwmStart().
|
|
* @post The PWM unit period is changed to the new value.
|
|
* @note If a period is specified that is shorter than the pulse width
|
|
* programmed in one of the channels then the behavior is not
|
|
* guaranteed.
|
|
*
|
|
* @param[in] pwmp pointer to a @p PWMDriver object
|
|
* @param[in] value new cycle time in ticks
|
|
*
|
|
* @iclass
|
|
*/
|
|
#define pwmChangePeriodI(pwmp, value) { \
|
|
(pwmp)->period = (value); \
|
|
pwm_lld_change_period(pwmp, value); \
|
|
}
|
|
|
|
/**
|
|
* @brief Enables a PWM channel.
|
|
* @pre The PWM unit must have been activated using @p pwmStart().
|
|
* @post The channel is active using the specified configuration.
|
|
* @note Depending on the hardware implementation this function has
|
|
* effect starting on the next cycle (recommended implementation)
|
|
* or immediately (fallback implementation).
|
|
*
|
|
* @param[in] pwmp pointer to a @p PWMDriver object
|
|
* @param[in] channel PWM channel identifier (0...PWM_CHANNELS-1)
|
|
* @param[in] width PWM pulse width as clock pulses number
|
|
*
|
|
* @iclass
|
|
*/
|
|
#define pwmEnableChannelI(pwmp, channel, width) \
|
|
pwm_lld_enable_channel(pwmp, channel, width)
|
|
|
|
/**
|
|
* @brief Disables a PWM channel.
|
|
* @pre The PWM unit must have been activated using @p pwmStart().
|
|
* @post The channel is disabled and its output line returned to the
|
|
* idle state.
|
|
* @note Depending on the hardware implementation this function has
|
|
* effect starting on the next cycle (recommended implementation)
|
|
* or immediately (fallback implementation).
|
|
*
|
|
* @param[in] pwmp pointer to a @p PWMDriver object
|
|
* @param[in] channel PWM channel identifier (0...PWM_CHANNELS-1)
|
|
*
|
|
* @iclass
|
|
*/
|
|
#define pwmDisableChannelI(pwmp, channel) \
|
|
pwm_lld_disable_channel(pwmp, channel)
|
|
|
|
/**
|
|
* @brief Returns a PWM channel status.
|
|
* @pre The PWM unit must have been activated using @p pwmStart().
|
|
*
|
|
* @param[in] pwmp pointer to a @p PWMDriver object
|
|
* @param[in] channel PWM channel identifier (0...PWM_CHANNELS-1)
|
|
*
|
|
* @iclass
|
|
*/
|
|
#define pwmIsChannelEnabledI(pwmp, channel) \
|
|
pwm_lld_is_channel_enabled(pwmp, channel)
|
|
/** @} */
|
|
|
|
/*===========================================================================*/
|
|
/* External declarations. */
|
|
/*===========================================================================*/
|
|
|
|
#ifdef __cplusplus
|
|
extern "C" {
|
|
#endif
|
|
void pwmInit(void);
|
|
void pwmObjectInit(PWMDriver *pwmp);
|
|
void pwmStart(PWMDriver *pwmp, const PWMConfig *config);
|
|
void pwmStop(PWMDriver *pwmp);
|
|
void pwmChangePeriod(PWMDriver *pwmp, pwmcnt_t period);
|
|
void pwmEnableChannel(PWMDriver *pwmp,
|
|
pwmchannel_t channel,
|
|
pwmcnt_t width);
|
|
void pwmDisableChannel(PWMDriver *pwmp, pwmchannel_t channel);
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|
|
|
|
#endif /* HAL_USE_PWM */
|
|
|
|
#endif /* _PWM_H_ */
|
|
|
|
/** @} */
|