/******************************************************************************
 * 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
 * limitations under the License.
 *
 *****************************************************************************/
#include "mdec.h"
#include "analog.h"
#include "clock.h"
#include "compiler.h"
#include "reg_include/mdec_reg.h"

/**
 * @brief		This function is used to initialize the MDEC module,include clock setting and input IO select.
 * @param[in]	pin	- mdec pin.
 * 					  In order to distinguish which pin the data is input from,
 *                    only one input pin can be selected one time.
 * @return		none.
 */
void mdec_init(mdec_pin_e pin)
{
    analog_write_reg8(mdec_rst_addr, (analog_read_reg8(mdec_rst_addr) & (~FLD_CLS_MDEC)) | pin);  // A0/B7/C4/D0/E0
}

/**
 * @brief		This function is used to read the receive data of MDEC module's IO.
 * @param[out]	dat		- The array to store date.
 * @return		1 decode success,  0 decode failure.
 */
unsigned char mdec_read_dat(unsigned char *dat)
{
    unsigned char m0, m1, m2, data_crc;

    dat[0] = analog_read_reg8(0x6a);
    dat[1] = analog_read_reg8(0x6b);
    dat[2] = analog_read_reg8(0x6c);
    dat[3] = analog_read_reg8(0x6d);
    dat[4] = analog_read_reg8(0x6e);

    m0 = ((dat[0] >> 5) << 4);
    m1 = dat[0] & 0x07;
    m2 = m0 + m1;
    data_crc = (((m2 + dat[1]) ^ dat[2]) + dat[3]) ^ 0xa5;

    if (data_crc == dat[4]) {
        return 1;
    }
    return 0;
}