/// <summary>
/// 向下封装PC-RSU数据帧,返回的是FF转义后的STX||RSCTL||DATA||BCC||ETX
/// </summary>
/// <param name="src">PC-RSU数据帧,RSCTL||DATA||BCC</param>
/// <param name="offSet">起始位置</param>
/// <param name="size">长度</param>
/// <param name="dest">返回的是FF转义后的STX||RSCTL||DATA||BCC||ETX</param>
protected void PcRsuFrameDown(byte[] src, int offSet, int size, out byte[] dest)
{
List <byte> _pcrsu_frame_down_temp = new List <byte>();
_pcrsu_frame_down_temp.Add(0XFF);
_pcrsu_frame_down_temp.Add(0XFF);
//矫正BCC
src[offSet + size - 1] = ViaHere.BccCalc(src, offSet, size - 1);
for (int i = offSet; i < offSet + size; i++)
{
switch (src[i])
{
case 0xFF:
_pcrsu_frame_down_temp.Add(0xfe);
_pcrsu_frame_down_temp.Add(0x01);
break;
case 0xFE:
_pcrsu_frame_down_temp.Add(0xfe);
_pcrsu_frame_down_temp.Add(0x00);
break;
default:
_pcrsu_frame_down_temp.Add(src[i]);
break;
}
}
_pcrsu_frame_down_temp.Add(0XFF);
dest = _pcrsu_frame_down_temp.ToArray();
}
/// <summary>
/// 返回FALSE，表示该帧无效
/// </summary>
/// <param name="bx"></param>
/// <returns></returns>
protected bool BxFrameCheck(byte[] bx)
{
if (bx == null)
{
return(false);
}
if (bx.Length <= 2)
{
return(false);
}
bool rt = true;
//帧长度以及帧头标识的检查
switch (bx[1])
{
case 0xB0:
if (bx.Length != 29 && bx.Length != 28)
{
rt = false;
}
break;
case 0xB1:
if (bx.Length != 5)
{
rt = false;
}
break;
case 0xB2:
if (bx.Length >= 7 && bx[6] == 0x80)
{
break;
}
else if (bx.Length != 35)
{
rt = false;
}
break;
case 0xB3:
if (bx.Length != 24)
{
rt = false;
}
break;
case 0xB4:
if (bx.Length != 98 && bx.Length != 101)
{
rt = false;
}
break;
case 0xB5:
if (bx.Length != 18 && bx.Length != 40 &&
bx.Length < 8 //仅检查到status字段
)
{
rt = false;
}
break;
default:
rt = false;
break;
}
//BCC CHECK
if (bx[bx.Length - 1] != ViaHere.BccCalc(bx, 0, bx.Length - 1))
{
rt = false;
}
return(rt);
}
