#ifndef __MODBUS_H
#define __MODBUS_H

#include "ucos_ii.h"


/*接收数组大小*/
#define MODBUS_RX_BUF_SIZE  256
/*发送数组大小*/
#define MODBUS_TX_BUF_SIZE  256

/*modbus通信波特率*/
#define MODBUS_USART_BAUDRATE 115200

/*从机地址*/
#define SLAVE_ADDRES   0x01

/*错误码*/
#define ERR_FUNC            0x01
#define ERR_OPE_ADDRES      0x02 
#define ERR_DATA            0x03
#define ERR_SLAVE           0x04

#define ERR_CRC             0x1F
#define ERR_SLAVE_ADDRES    0x2F

/*modbus帧结构*/
typedef struct Modbus_Frame
{
    uint8_t slaveAddres;    /*从机地址*/
    uint8_t func;           /*功能码*/
    uint16_t opeAddres;     /*操作地址*/
    uint16_t opeNum;        /*操作数量*/
    uint8_t wNum;           /*写入字节数*/
    uint8_t wData[256];     /*写入数据*/
    uint16_t crc;           /*CRC校验码*/
}MODBUS_FRAME;


/*接收到数据帧信号量*/
extern OS_EVENT *ModbusReceived;

uint8_t ModbusErrReply(uint8_t func, uint8_t err);
uint16_t Crc16(const uint8_t *data, uint16_t length);
void AddCrc16(uint8_t *data, uint16_t length);
int8_t ChcekCrc16(uint16_t recCrc16, uint8_t *data, uint16_t length);
uint8_t ModbusReadCoils(uint16_t addres, uint16_t num);
uint8_t ModbusWriteCoils(uint16_t addres, uint16_t num, uint8_t *data);
uint8_t ModbusReadRegs(uint16_t addres, uint16_t num);
uint8_t ModbusWriteRegs(uint16_t addres, uint16_t num, uint8_t *data);
uint8_t ModbusWriteReg(uint16_t addres, uint8_t *data);
uint8_t ModbusWriteCoil(uint16_t addres, uint8_t *data);
uint8_t ModbusExtReadOdd(uint16_t num);
void ModbusSend(uint8_t *txBuf, uint16_t len);


#endif