SmartPDCode/control/bootloader/boot/Modbus/BARE/port/port.c

/*
 * FreeModbus Libary: BARE Demo Application
 * Copyright (C) 2006 Christian Walter <wolti@sil.at>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 *
 * File: $Id$
 */

/* ----------------------- Modbus includes ----------------------------------*/
#include "mb.h"
#include "mbport.h"
#include "string.h"
#include "cfg.h"
#include "main.h"


/* ----------------------- Defines ------------------------------------------*/
//输入寄存器
#define REG_INPUT_START  1000
#define REG_INPUT_NREGS  500

//保持寄存器
#define REG_HOLD_START   1500
#define REG_HOLD_NREGS   500

//线圈
#define REG_COILS_START  0
#define REG_COILS_NREGS  4

//开关寄存器
#define REG_DISCRETE_START 1000
#define REG_DISCRETE_NREGS 4
/* ----------------------- Static variables ---------------------------------*/
static USHORT   usRegInputStart = REG_INPUT_START;
static USHORT   usRegInputBuf[REG_INPUT_NREGS];


static USHORT   usRegHoldStart = REG_HOLD_START;
static USHORT   usRegHoldBuf[REG_HOLD_NREGS];

static USHORT   usRegCoilsStart = REG_COILS_START;
static uint8_t  usRegCoilsBuf[REG_COILS_NREGS];

static USHORT   usRegDiscreteStart = REG_DISCRETE_START;
static uint8_t  usRegDiscreteBuf[REG_DISCRETE_NREGS];



/****************************************************************************
* 名	  称：eMBRegInputCB
* 功    能：读取输入寄存器，对应功能码是 04 eMBFuncReadInputRegister
* 入口参数：pucRegBuffer: 数据缓存区，用于响应主机
*						usAddress: 寄存器地址
*						usNRegs: 要读取的寄存器个数
* 出口参数：
* 注	  意：上位机发来的 帧格式是: SlaveAddr(1 Byte)+FuncCode(1 Byte)
*								+StartAddrHiByte(1 Byte)+StartAddrLoByte(1 Byte)
*								+LenAddrHiByte(1 Byte)+LenAddrLoByte(1 Byte)+
*								+CRCAddrHiByte(1 Byte)+CRCAddrLoByte(1 Byte)
*							3 区
****************************************************************************/
eMBErrorCode
eMBRegInputCB( UCHAR * pucRegBuffer, USHORT usAddress, USHORT usNRegs )
{
    eMBErrorCode    eStatus = MB_ENOERR;
    int             iRegIndex;
		usAddress = usAddress - 1;
	
    if( ( usAddress >= REG_INPUT_START ) && ( usAddress + usNRegs <= REG_INPUT_START + REG_INPUT_NREGS ) )
    {
        iRegIndex = ( int )( usAddress - usRegInputStart );
        while( usNRegs > 0 )
        {
            *pucRegBuffer++ = ( unsigned char )( usRegInputBuf[iRegIndex] >> 8 );
            *pucRegBuffer++ = ( unsigned char )( usRegInputBuf[iRegIndex] & 0xFF );
            iRegIndex++;
            usNRegs--;
        }
    }
    else
    {
        eStatus = MB_ENOREG;
    }

    return eStatus;
}
/****************************************************************************
* 名	  称：eMBRegHoldingCB
* 功    能：对应功能码有：06 写保持寄存器 eMBFuncWriteHoldingRegister
*													16 写多个保持寄存器 eMBFuncWriteMultipleHoldingRegister
*													03 读保持寄存器 eMBFuncReadHoldingRegister
*													23 读写多个保持寄存器 eMBFuncReadWriteMultipleHoldingRegister
* 入口参数：pucRegBuffer: 数据缓存区，用于响应主机
*						usAddress: 寄存器地址
*						usNRegs: 要读写的寄存器个数
*						eMode: 功能码
* 出口参数：
* 注	  意：4 区
****************************************************************************/


static uint8_t cmd_cnt = 0;
extern uint8_t md_status;
//uint16_t swap_buff[MAX_LENTH] = {0};


eMBErrorCode
eMBRegHoldingCB( UCHAR * pucRegBuffer, USHORT usAddress, USHORT usNRegs, eMBRegisterMode eMode )
{
    eMBErrorCode    eStatus = MB_ENOERR;
    int             iRegIndex;
		usAddress = usAddress - 1;
		
		uint32_t WiRegIndex = 0;
		uint32_t WusNRegs = 0;
		//Upgrade *upgrade =  get_upgrade();
		g_MD_Data *g_data = get_md_data();
	
    if((usAddress >= REG_HOLD_START) && ((usAddress+usNRegs) <= (REG_HOLD_START + REG_HOLD_NREGS)))
    {
        iRegIndex = (int)(usAddress - usRegHoldStart);
				WiRegIndex = iRegIndex;
        switch(eMode)
        {
					case MB_REG_READ://读寄存器
					{
						if(usAddress == MD_READ_STATUS)
						{
							usRegHoldBuf[iRegIndex] = md_status;
						}
						while(usNRegs > 0)
						{
							*pucRegBuffer++ = (uint8_t)(usRegHoldBuf[iRegIndex] >> 8);
							*pucRegBuffer++ = (uint8_t)(usRegHoldBuf[iRegIndex] & 0xFF);
							iRegIndex++;
							usNRegs--;
						}
						break;
					}
					case MB_REG_WRITE://写寄存器
					{
						WusNRegs = usNRegs;
						while(usNRegs > 0)
						{
							usRegHoldBuf[iRegIndex] = *pucRegBuffer++ << 8;
							usRegHoldBuf[iRegIndex] |= *pucRegBuffer++;
							iRegIndex++;
							usNRegs--;
						}
						{
								switch(usAddress)
								{
									case MD_WRIE_DATA:
									{
			
										g_data->data[cmd_cnt].flag = 1;
										g_data->data[cmd_cnt].base_addr = usAddress-MD_BASE_Addr;
										g_data->data[cmd_cnt].flash_Data.index = usRegHoldBuf[WiRegIndex];
										g_data->data[cmd_cnt].flash_Data.lenth = usRegHoldBuf[WiRegIndex+1];
										
										memcpy(g_data->data[cmd_cnt].flash_Data.recive,&usRegHoldBuf[WiRegIndex+2],(WusNRegs-2) * 2);
										cmd_cnt++;
										if(cmd_cnt >= g_data->count)
										{
											cmd_cnt = 0;
										}
									}
									break;
									default:
										eStatus = MB_ENOREG;
										break;
								}
				
						}
						break;
					}
				}
    }
    else//错误
    {
        eStatus = MB_ENOREG;
    }

    return eStatus;
}

/****************************************************************************
* 名	  称：eMBRegCoilsCB
* 功    能：对应功能码有：01 读线圈 eMBFuncReadCoils
*													05 写线圈 eMBFuncWriteCoil
*													15 写多个线圈 eMBFuncWriteMultipleCoils
* 入口参数：pucRegBuffer: 数据缓存区，用于响应主机
*						usAddress: 线圈地址
*						usNCoils: 要读写的线圈个数
*						eMode: 功能码
* 出口参数：
* 注	  意：如继电器
*						0 区
****************************************************************************/
eMBErrorCode
eMBRegCoilsCB( UCHAR * pucRegBuffer, USHORT usAddress, USHORT usNCoils, eMBRegisterMode eMode )
{
    eMBErrorCode    eStatus = MB_ENOERR;
    USHORT          iRegIndex;
    USHORT usCoilGroups = ((usNCoils - 1) / 8 + 1);
    UCHAR  ucStatus     = 0;
    UCHAR  ucBits       = 0;
    UCHAR  ucDisp       = 0;
		usAddress = usAddress - 1;
	
    if((usAddress >= REG_COILS_START) &&	((usAddress + usNCoils) <= (REG_COILS_START + REG_COILS_NREGS)))
    {
        iRegIndex = (USHORT)(usAddress - usRegCoilsStart);
        switch(eMode)
        {
        case MB_REG_READ://读线圈
            while(usCoilGroups--)
            {
                ucDisp = 0;
                ucBits = 8;
                while((usNCoils--) != 0 && (ucBits--) != 0)
                {
                    ucStatus |= (usRegCoilsBuf[iRegIndex++] << (ucDisp++));
                }
                *pucRegBuffer++ = ucStatus;
            }
            break;
        case MB_REG_WRITE://写线圈
            while(usCoilGroups--)
            {
                ucStatus = *pucRegBuffer++;
                ucBits   = 8;
                while((usNCoils--) != 0 && (ucBits--) != 0)
                {
                    usRegCoilsBuf[iRegIndex++] = ucStatus & 0X01;
                    ucStatus >>= 1;
                }
            }
        }
    }
    else//错误
    {
        eStatus = MB_ENOREG;
    }

    return eStatus;
}
/****************************************************************************
* 名	  称：eMBRegDiscreteCB 
* 功    能：读取离散寄存器，对应功能码有：02 读离散寄存器 eMBFuncReadDiscreteInputs
* 入口参数：pucRegBuffer: 数据缓存区，用于响应主机   
*						usAddress: 寄存器地址
*						usNDiscrete: 要读取的寄存器个数
* 出口参数：
* 注	  意：1 区
****************************************************************************/
eMBErrorCode
eMBRegDiscreteCB( UCHAR * pucRegBuffer, USHORT usAddress, USHORT usNDiscrete )
{
    eMBErrorCode    eStatus = MB_ENOERR;
    USHORT          iRegIndex;
    USHORT usDiscreteGroups = ((usNDiscrete - 1) / 8 + 1);
    UCHAR  ucStatus     = 0;
    UCHAR  ucBits       = 0;
    UCHAR  ucDisp       = 0;
		usAddress = usAddress - 1;
	
    if((usAddress >= REG_DISCRETE_START) &&	((usAddress + usNDiscrete) <= (REG_DISCRETE_START + REG_DISCRETE_NREGS)))
    {
        iRegIndex = (USHORT)(usAddress - usRegDiscreteStart);

				while(usDiscreteGroups--)
				{
						ucDisp = 0;
						ucBits = 8;
						while((usNDiscrete--) != 0 && (ucBits--) != 0)
						{
								if(usRegDiscreteBuf[iRegIndex])
								{
										ucStatus |= (1 << ucDisp);
								}
								ucDisp++;
						}
						*pucRegBuffer++ = ucStatus;
				}
    }
    else//错误
    {
        eStatus = MB_ENOREG;
    }

    return eStatus;
}