191 lines
5.8 KiB
C
191 lines
5.8 KiB
C
/*
|
|
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/>.
|
|
*/
|
|
|
|
/**
|
|
* @file templates/pwm_lld.c
|
|
* @brief PWM Driver subsystem low level driver source template.
|
|
*
|
|
* @addtogroup PWM
|
|
* @{
|
|
*/
|
|
|
|
#include "ch.h"
|
|
#include "hal.h"
|
|
|
|
#if HAL_USE_PWM || defined(__DOXYGEN__)
|
|
|
|
/*===========================================================================*/
|
|
/* Driver local definitions. */
|
|
/*===========================================================================*/
|
|
|
|
/*===========================================================================*/
|
|
/* Driver exported variables. */
|
|
/*===========================================================================*/
|
|
|
|
/**
|
|
* @brief PWM1 driver identifier.
|
|
*/
|
|
#if PLATFORM_PWM_USE_PWM1 || defined(__DOXYGEN__)
|
|
PWMDriver PWMD1;
|
|
#endif
|
|
|
|
/*===========================================================================*/
|
|
/* Driver local variables. */
|
|
/*===========================================================================*/
|
|
|
|
/*===========================================================================*/
|
|
/* Driver local functions. */
|
|
/*===========================================================================*/
|
|
|
|
/*===========================================================================*/
|
|
/* Driver interrupt handlers. */
|
|
/*===========================================================================*/
|
|
|
|
/*===========================================================================*/
|
|
/* Driver exported functions. */
|
|
/*===========================================================================*/
|
|
|
|
/**
|
|
* @brief Low level PWM driver initialization.
|
|
*
|
|
* @notapi
|
|
*/
|
|
void pwm_lld_init(void) {
|
|
|
|
#if PLATFORM_PWM_USE_PWM1
|
|
/* Driver initialization.*/
|
|
pwmObjectInit(&PWMD1);
|
|
#endif /* PLATFORM_PWM_USE_PWM1 */
|
|
}
|
|
|
|
/**
|
|
* @brief Configures and activates the PWM peripheral.
|
|
*
|
|
* @param[in] pwmp pointer to the @p PWMDriver object
|
|
*
|
|
* @notapi
|
|
*/
|
|
void pwm_lld_start(PWMDriver *pwmp) {
|
|
|
|
if (pwmp->state == PWM_STOP) {
|
|
/* Enables the peripheral.*/
|
|
#if PLATFORM_PWM_USE_PWM1
|
|
if (&PWMD1 == pwmp) {
|
|
|
|
}
|
|
#endif /* PLATFORM_PWM_USE_PWM1 */
|
|
}
|
|
/* Configures the peripheral.*/
|
|
|
|
}
|
|
|
|
/**
|
|
* @brief Deactivates the PWM peripheral.
|
|
*
|
|
* @param[in] pwmp pointer to the @p PWMDriver object
|
|
*
|
|
* @notapi
|
|
*/
|
|
void pwm_lld_stop(PWMDriver *pwmp) {
|
|
|
|
if (pwmp->state == PWM_READY) {
|
|
/* Resets the peripheral.*/
|
|
|
|
/* Disables the peripheral.*/
|
|
#if PLATFORM_PWM_USE_PWM1
|
|
if (&PWMD1 == pwmp) {
|
|
|
|
}
|
|
#endif /* PLATFORM_PWM_USE_PWM1 */
|
|
}
|
|
}
|
|
|
|
/**
|
|
* @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 The function has effect at the next cycle start.
|
|
* @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] period new cycle time in ticks
|
|
*
|
|
* @notapi
|
|
*/
|
|
void pwm_lld_change_period(PWMDriver *pwmp, pwmcnt_t period) {
|
|
|
|
(void)pwmp;
|
|
(void)period;
|
|
|
|
}
|
|
|
|
/**
|
|
* @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
|
|
*
|
|
* @notapi
|
|
*/
|
|
void pwm_lld_enable_channel(PWMDriver *pwmp,
|
|
pwmchannel_t channel,
|
|
pwmcnt_t width) {
|
|
|
|
(void)pwmp;
|
|
(void)channel;
|
|
(void)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)
|
|
*
|
|
* @notapi
|
|
*/
|
|
void pwm_lld_disable_channel(PWMDriver *pwmp, pwmchannel_t channel) {
|
|
|
|
(void)pwmp;
|
|
(void)channel;
|
|
|
|
}
|
|
|
|
#endif /* HAL_USE_PWM */
|
|
|
|
/** @} */
|