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/*!
\file gd32e230_cmp.c
\brief CMP driver
\version 2018-06-19, V1.0.0, firmware for GD32E230
*/
/*
Copyright (c) 2018, GigaDevice Semiconductor Inc.
All rights reserved.
Redistribution and use in source and binary forms, with or without modification,
are permitted provided that the following conditions are met:
1. Redistributions of source code must retain the above copyright notice, this
list of conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above copyright notice,
this list of conditions and the following disclaimer in the documentation
and/or other materials provided with the distribution.
3. Neither the name of the copyright holder nor the names of its contributors
may be used to endorse or promote products derived from this software without
specific prior written permission.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
OF SUCH DAMAGE.
*/
#include "gd32e230_cmp.h"
/*!
\brief deinitialize comparator
\param[in] none
\param[out] none
\retval none
*/
void cmp_deinit(void)
{
CMP_CS = ((uint32_t)0x00000000U);
}
/*!
\brief initialize comparator mode
\param[in] operating_mode
\arg CMP_HIGHSPEED: high speed mode
\arg CMP_MIDDLESPEED: medium speed mode
\arg CMP_LOWSPEED: low speed mode
\arg CMP_VERYLOWSPEED: very-low speed mode
\param[in] inverting_input
\arg CMP_1_4VREFINT: VREFINT *1/4 input
\arg CMP_1_2VREFINT: VREFINT *1/2 input
\arg CMP_3_4VREFINT: VREFINT *3/4 input
\arg CMP_VREFINT: VREFINT input
\arg CMP_PA4: PA4 input
\arg CMP_PA5: PA5 input
\arg CMP_PA0: PA0 input
\arg CMP_PA2: PA2 input
\param[in] hysteresis
\arg CMP_HYSTERESIS_NO: output no hysteresis
\arg CMP_HYSTERESIS_LOW: output low hysteresis
\arg CMP_HYSTERESIS_MIDDLE: output middle hysteresis
\arg CMP_HYSTERESIS_HIGH: output high hysteresis
\param[out] none
\retval none
*/
void cmp_mode_init(operating_mode_enum operating_mode, inverting_input_enum inverting_input, cmp_hysteresis_enum output_hysteresis)
{
/* initialize comparator mode */
CMP_CS |= CS_CMPM(operating_mode) | CS_CMPMSEL(inverting_input) | CS_CMPHST(output_hysteresis);
}
/*!
\brief initialize comparator output
\param[in] output_slection
\arg CMP_OUTPUT_NONE: output no selection
\arg CMP_OUTPUT_TIMER0BKIN: TIMER 0 break input
\arg CMP_OUTPUT_TIMER0IC0: TIMER 0 channel0 input capture
\arg CMP_OUTPUT_TIMER0OCPRECLR: TIMER 0 OCPRE_CLR input
\arg CMP_OUTPUT_TIMER2IC0: TIMER 2 channel0 input capture
\arg CMP_OUTPUT_TIMER2OCPRECLR: TIMER 2 OCPRE_CLR input
\param[in] output_polarity
\arg CMP_OUTPUT_POLARITY_INVERTED: output is inverted
\arg CMP_OUTPUT_POLARITY_NOINVERTED: output is not inverted
\param[out] none
\retval none
*/
void cmp_output_init(cmp_output_enum output_slection, uint32_t output_polarity)
{
/* initialize comparator output */
CMP_CS |= CS_CMPOSEL(output_slection);
/* output polarity */
if(CMP_OUTPUT_POLARITY_INVERTED == output_polarity){
CMP_CS |= CMP_CS_CMPPL;
}else{
CMP_CS &= ~CMP_CS_CMPPL;
}
}
/*!
\brief enable comparator
\param[in] none
\param[out] none
\retval none
*/
void cmp_enable(void)
{
CMP_CS |= CMP_CS_CMPEN;
}
/*!
\brief disable comparator
\param[in] none
\param[out] none
\retval none
*/
void cmp_disable(void)
{
CMP_CS &= ~CMP_CS_CMPEN;
}
/*!
\brief enable comparator switch
\param[in] none
\param[out] none
\retval none
*/
void cmp_switch_enable(void)
{
CMP_CS |= CMP_CS_CMPSW;
}
/*!
\brief disable comparator switch
\param[in] none
\param[out] none
\retval none
*/
void cmp_switch_disable(void)
{
CMP_CS &= ~CMP_CS_CMPSW;
}
/*!
\brief get output level
\param[in] none
\param[out] none
\retval the output level
*/
uint32_t cmp_output_level_get(void)
{
if(CMP_CS & CMP_CS_CMPO){
return CMP_OUTPUTLEVEL_HIGH;
}else{
return CMP_OUTPUTLEVEL_LOW;
}
}
/*!
\brief lock the comparator
\param[in] none
\param[out] none
\retval none
*/
void cmp_lock_enable(void)
{
CMP_CS |= CMP_CS_CMPLK;
}
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