EEPW论坛

功能描述：钱包文件扣减。 
输入条件：SysKind=0--->EasmChip的操作，SysKind=1-->CpuCard的操作,FileId二进制文件标识符
输出项目：RetData=0x00操作成功;RetData=0xFF此操作失败。

unsigned char Decrease(bool SysKind,unsigned char FileId,unsigned int DecData)
{
    unsigned char i,Ucflag = 0xFF;
    RamCler(CosBuf,16);
    CmdBuf[CLA] = 0x80;
    CmdBuf[INS] = 0x30;
    CmdBuf[P01] = 0x00;
    FileId <<= 3;
    FileId = FileId+0x04;
    CmdBuf[P02] = FileId;
    CmdBuf[P03] = 3;
    CmdBuf[5] = 0;
    CmdBuf[6] = (unsigned char)(DecData >> 8);//-------------------------------nameh=0x3F
    CmdBuf[7] = (unsigned char)DecData;//--------------------------------------namel = 0x01
    RamCler(CosBuf,16);
    for(i = 0; i < 3; i ++)
    {
        CosCommand(SysKind,2,3);
        if( (SwBuf[0] == 0x94) && (SwBuf[1] == 0x01) )
        {
            i=5;
            break;
        }
        else
        {
            if( SwBuf[0] == 0x61 ) 
            {
                Ucflag = GetResponse(SysKind,SwBuf[1]);
                if(Ucflag == 0x00) 
                {
                    break;
                }
            }
        }
    }
    if(i < 3) 
    {
        return 0x00;
    }
    else 
    {
        return 0xff; 
    }
}