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 * Copyright (c) 2022 Telink Semiconductor (Shanghai) Co., Ltd. ("TELINK")
 * All rights reserved.
 *
 * 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
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/********************************************************************************************************
 * @file	lpc.c
 *
 * @brief	This is the source file for B91
 *
 * @author	Driver Group
 *
 *******************************************************************************************************/
#include "lpc.h"

/**
 * @brief		This function selects input reference voltage for low power comparator.
 * @param[in]	mode	- lower power comparator working mode includes normal mode and low power mode.
 * @param[in]	ref		- selected input reference voltage.
 * @return		none.
 */
void lpc_set_input_ref(lpc_mode_e mode,lpc_reference_e ref)
{
	if(mode == LPC_LOWPOWER)
	{
		analog_write_reg8(0x0b,analog_read_reg8(0x0b)|0x08);
		analog_write_reg8(0x0d,analog_read_reg8(0x0d)|0x80);
	}
	else if(mode == LPC_NORMAL)
	{
		analog_write_reg8(0x0b,analog_read_reg8(0x0b)&0xf7);
		analog_write_reg8(0x0d,analog_read_reg8(0x0d)&0x7f);
	}
	analog_write_reg8(0x0d,(analog_read_reg8(0x0d)&0x8f)|(ref<<4));
}