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/*
ChibiOS - Copyright (C) 2006..2019 Giovanni Di Sirio
Copyright (C) 2019 Fabien Poussin (fabien.poussin (at) google's mail)
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
/**
* @file STM32/hal_opamp_lld.c
* @brief STM32 Operational Amplifier subsystem low level driver header.
*
* @addtogroup OPAMP
* @{
*/
#include "hal.h"
#if HAL_USE_OPAMP || defined(__DOXYGEN__)
#include "hal_opamp.h"
/*===========================================================================*/
/* Driver local definitions. */
/*===========================================================================*/
/*===========================================================================*/
/* Driver exported variables. */
/*===========================================================================*/
/**
* @brief OPAMPD1 driver identifier.
* @note The driver OPAMPD1 allocates the comparator OPAMP1 when enabled.
*/
#if STM32_OPAMP_USE_OPAMP1 || defined(__DOXYGEN__)
OPAMPDriver OPAMPD1;
#endif
/**
* @brief OPAMPD2 driver identifier.
* @note The driver OPAMPD2 allocates the comparator OPAMP2 when enabled.
*/
#if STM32_OPAMP_USE_OPAMP2 || defined(__DOXYGEN__)
OPAMPDriver OPAMPD2;
#endif
/**
* @brief OPAMPD3 driver identifier.
* @note The driver OPAMPD3 allocates the comparator OPAMP3 when enabled.
*/
#if STM32_OPAMP_USE_OPAMP3 || defined(__DOXYGEN__)
OPAMPDriver OPAMPD3;
#endif
/**
* @brief OPAMPD4 driver identifier.
* @note The driver OPAMPD4 allocates the comparator OPAMP4 when enabled.
*/
#if STM32_OPAMP_USE_OPAMP4 || defined(__DOXYGEN__)
OPAMPDriver OPAMPD4;
#endif
/*===========================================================================*/
/* Driver local variables and types. */
/*===========================================================================*/
/*===========================================================================*/
/* Driver local functions. */
/*===========================================================================*/
/*===========================================================================*/
/* Driver interrupt handlers. */
/*===========================================================================*/
/*===========================================================================*/
/* Driver exported functions. */
/*===========================================================================*/
/**
* @brief Low level OPAMP driver initialization.
*
* @notapi
*/
void opamp_lld_init(void) {
#if STM32_OPAMP_USE_OPAMP1
/* Driver initialization.*/
opampObjectInit(&OPAMPD1);
OPAMPD1.reg = OPAMP;
OPAMPD1.reg->CSR = 0;
#endif
#if STM32_OPAMP_USE_OPAMP2
/* Driver initialization.*/
opampObjectInit(&OPAMPD2);
OPAMPD2.reg = OPAMP2;
OPAMPD2.reg->CSR = 0;
#endif
#if STM32_OPAMP_USE_OPAMP3
/* Driver initialization.*/
opampObjectInit(&OPAMPD3);
OPAMPD3.reg = OPAMP3;
OPAMPD3.reg->CSR = 0;
#endif
#if STM32_OPAMP_USE_OPAMP4
/* Driver initialization.*/
opampObjectInit(&OPAMPD4);
OPAMPD4.reg = OPAMP4;
OPAMPD4.reg->CSR = 0;
#endif
}
/**
* @brief Configures and activates the OPAMP peripheral.
*
* @param[in] compp pointer to the @p OPAMPDriver object
*
* @notapi
*/
void opamp_lld_start(OPAMPDriver *compp) {
// Apply CSR Execpt the enable bit.
compp->reg->CSR = compp->config->csr & ~OPAMP_CSR_OPAMPxEN;
}
/**
* @brief Deactivates the comp peripheral.
*
* @param[in] compp pointer to the @p OPAMPDriver object
*
* @notapi
*/
void opamp_lld_stop(OPAMPDriver *compp) {
if (compp->state == OPAMP_READY) {
compp->reg->CSR = 0;
}
}
/**
* @brief Enables the output.
*
* @param[in] compp pointer to the @p OPAMPDriver object
*
* @notapi
*/
void opamp_lld_enable(OPAMPDriver *compp) {
compp->reg->CSR |= OPAMP_CSR_OPAMPxEN; /* Enable */
}
/**
* @brief Disables the output.
*
* @param[in] compp pointer to the @p OPAMPDriver object
*
* @notapi
*/
void opamp_lld_disable(OPAMPDriver *compp) {
compp->reg->CSR &= ~OPAMP_CSR_OPAMPxEN; /* Disable */
}
#endif /* HAL_USE_OPAMP */
/** @} */
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