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be copied by any method or incorporated into another program without
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#ifndef PROTO_IEC_YJ_H
#define PROTO_IEC_YJ_H

#include "os_types_api.h"
#include "iot_utils_api.h"
#include "iot_pkt_api.h"

#ifdef __cplusplus
extern "C" {
#endif

/* define invalid multi-obis index for stop multi obis read */
#define PROTO_IEC_YJ_MULTI_OBIS_INDEX_INVALID   (50)

/**
 * @brief according to the DI group meter reading message pkt
 *
 * @param di di of dl/t 645-97
 * @param *multi_obis_idx address for multi_obis_idx
 * @return pkt or None
 */
iot_pkt_t *proto_iec_yj_build_iec_by_64597_di(
    uint16_t di, uint8_t *multi_obis_idx);

/**
 * @brief convert IEC response data frames to 64597 data domain data.
 *
 * @param di    di value for meter read with 645-1997
 * @param src   iec complete meter reading response message
 * @param dst   memory address for storing 6451997 data
 * @param len   length of iec data
 * @return data length for 64597
 */
uint8_t proto_iec_yj_iec_map_to_64597_data(
    uint16_t di, uint8_t *src, uint8_t *dst, uint8_t len);

/**
 * @brief convert IEC response data frames to 64597 data domain data
 *        for read block data with DL/T 645-1997.
 *
 * @param di    di value for meter read with 645-1997
 * @param src   iec complete meter reading response message
 * @param dst   memory address for storing 6451997 data
 * @param len   length of iec data
 * @param *multi_obis_idx address for multi_obis_idx
 * @return data length for 64597
 */
uint8_t proto_iec_yj_iec_map_to_64597_data_multi_obis(
    uint16_t di, uint8_t *src, uint8_t *dst, uint8_t len,
    uint8_t *multi_obis_idx);

/**
 * @brief calc xor crc value by yujian
 *
 * @param p   address of data.
 * @param len len of data
 * @return crc value
 */
uint8_t proto_iec_calc_crc(uint8_t *p, uint8_t len);

#ifdef __cplusplus
}
#endif

#endif /* PROTO_IEC_YJ_H */