lcp.c

移植uCOS-II到ARM7代码应用举例,希望大家可以帮助

/****************************************Copyright (c)**************************************************
**                               广州周立功单片机发展有限公司
**                                     研    究    所
**                                        产品一部 
**
**                                 http://www.zlgmcu.com
**
**--------------文件信息--------------------------------------------------------------------------------
**文   件   名: LPC.h
**创   建   人: 陈明计
**最后修改日期: 2004年4月23日
**描        述: PPP 链路质量监控协议头处理程序
**              
**--------------历史版本信息----------------------------------------------------------------------------
** 创建人: 陈明计
** 版  本: 0.10b
** 日　期: 2004年4月23日
** 描　述: 原始版本
**
**--------------当前版本修订------------------------------------------------------------------------------
** 修改人: 
** 日　期: 
** 描　述: 
**
**------------------------------------------------------------------------------------------------------
********************************************************************************************************/
#define IN_LCP

#include "config.h"

uint8 LcpCfg[] = {
                     PPP_FRAM_TYPE__LPC / 256, PPP_FRAM_TYPE__LPC % 256,
                     0x01,0x00,
                     0x00,0x04,
                     };

uint8 LcpTermReg[] = {
                     PPP_FRAM_TYPE__LPC / 256, PPP_FRAM_TYPE__LPC % 256,
                     0x05,0x00,
                     0x00,0x04,
                     };


        void SendCfgFram(PppData *ThisPPP, uint8 *In)
{
    uint16 NByte;

    NByte= ((In[4] * 256) | In[5]) + 2;
    PPPDriveWrite(ThisPPP->HardDrive, In, NByte);
}


        void LCPSendCfgReq(PppData *ThisPPP)
{
    LcpCfg[3] = ThisPPP->FramID++;
    SendCfgFram(ThisPPP, LcpCfg);
}

        void LCPSendCfgAck(PppData *ThisPPP, uint8 * DataBuf)
{
    DataBuf[2] = LCP_CFG_ACK;
    SendCfgFram(ThisPPP, DataBuf);
}




        void LCPSendCfgNak(PppData *ThisPPP, uint8 * DataBuf)
{
    SendCfgFram(ThisPPP, DataBuf);
}

        void LCPSendTermReq(PppData *ThisPPP)
{
    LcpTermReg[3] = ThisPPP->FramID++;
    SendCfgFram(ThisPPP, LcpTermReg);
}

        void LCPSendTermAck(PppData *ThisPPP, uint8 * DataBuf)
{
    DataBuf[2] = LCP_TERM_ACK;
    SendCfgFram(ThisPPP, DataBuf);
}

        void LCPSendCodeRej(PppData *ThisPPP, uint8 * DataBuf)
{
    uint16 NByte;
    
    ThisPPP = ThisPPP;

    DataBuf -= 3;
    NByte = ((DataBuf[1] * 256) | DataBuf[2]) + 1;
    DataBuf[0] = PPP_FRAM_TYPE__LPC / 256;
    DataBuf[1] = PPP_FRAM_TYPE__LPC % 256,
    DataBuf[2] = LCP_CODE_REJ;
    PPPDriveWrite(ThisPPP->HardDrive, DataBuf, NByte);
}


        void LCPSendEchoReply(PppData *ThisPPP, uint8 * DataBuf)
{
    DataBuf[2] = LCP_ECHO_REPLY;
    SendCfgFram(ThisPPP, DataBuf);
}







        uint16 LCPReviceCfg(uint8 *Fram, uint8 Flag)
{
    int16 FramNByte,RtNByte;
    uint8 temp;
    uint8 *cp;
    
    FramNByte = Fram[0] * 256 | Fram[1] - 4;
    Fram += 2;
    RtNByte = 0;
    cp = Fram;
    
    while (FramNByte > 0)
    {
        FramNByte -= Fram[1];
        temp = LCP_CFG_REJ;
        switch (*Fram)
        {
            case 0:                         /* RESERVED */
                //temp = LCP_CFG_REJ;
                break;
            case 1:                         /* Maximum-Receive-Unit */
                //temp = LCP_CFG_REJ;
                break;
            case 3:                         /* Authentication-Protocol */
                temp = CfgPAP(Fram);
                break;
            case 4:                         /* Quality-Protocol */
                //temp = LCP_CFG_REJ;
                break;
            case 5:                         /* Magic-Number */
                temp = LCP_CFG_ACK;
                break;
            case 7:                         /* Protocol-Field-Compression */
                //temp = LCP_CFG_REJ;
                break;
            case 8:                         /* Address-and-Control-Field-Compression */
                //temp = LCP_CFG_REJ;
                break;
            default:
#if EN_LCP_REVICE_CFG_HOOHK > 0
                temp = LCPReviceCfgHooK(Fram);
#endif
                break;
        }
        if (temp == Flag)
        {
            temp = Fram[1];
            RtNByte += temp;
            while (temp--)
            {
                *cp++ = *Fram++;
            }
        }
        else
        {
            Fram += Fram[1];
        }
    }
    return RtNByte;
}

        uint8 LCPReviceFram(uint8 *Fram)
{
    uint16 NByte;
    uint8 rt;
    
    rt = PPP_EVENT_RUC;
    
    Fram += 2;
    switch (*Fram)
    {
        case LCP_CFG_REQ:
            *Fram = LCP_CFG_ACK;
            rt = PPP_EVENT_RCR_GOOD;
            

            NByte = LCPReviceCfg(Fram + 2, LCP_CFG_REJ);
            if (NByte == 0)
            {
                NByte = LCPReviceCfg(Fram + 2, LCP_CFG_NAK);
                if(NByte == 0)
                {
                    break;
                }
                *Fram = LCP_CFG_NAK;
            }
            else
            {
                *Fram = LCP_CFG_REJ;
            }

            NByte += 4;
            Fram += 2;
            *Fram++ = NByte / 256;
            *Fram = NByte & 0xff;
            rt = PPP_EVENT_RCR_BAD;
            break;
        case LCP_CFG_ACK:
            rt = PPP_EVENT_RCA;
            break;
        case LCP_CFG_NAK:
            rt = PPP_EVENT_RCN;
            break;
        case LCP_CFG_REJ:
            rt = PPP_EVENT_RCN;
            break;
        case LCP_TERM_REQ:
            rt = PPP_EVENT_RTR;
            break;
        case LCP_TERM_ACK:
            rt = PPP_EVENT_RTA;
            break;
        case LCP_CODE_REJ:


            rt = PPP_EVENT_RXJ_p;
            break;
        case LCP_ECHO_REQ:
            rt = PPP_EVENT_RXR;
            break;
        case LCP_ECHO_REPLY:
            rt = PPP_EVENT_NONE;
            break;
        case LCP_DISCARD_REQ:
            rt = PPP_EVENT_NONE;
            break;
        default :
#if EN_LCP_REVICE_FRAM_HOOHK > 0        
            rt = LCPReviceFramHook(Fram);
#endif
            break;
    }
    return rt;
}
/*********************************************************************************************************
**                            End Of File
********************************************************************************************************/