osamu funada / Mbed 2 deprecated led_sender_post

テストモード追加、LED有効化 left -> SerialRX, Data Recieve Complete , Serial Tx , Light Tx

Dependencies:   XBee mbed NetServicesMin

frame_layer/culc_crc16.cpp

Committer:
recotana
Date:
2012-04-18
Revision:
2:dec6319cf02c
Parent:
0:42adca80439c

File content as of revision 2:dec6319cf02c:

#include "mbed.h"
#include "types.h"
#include "config.h"
#include "culc_crc16.h"

unsigned int One_Byte_CRC16_Calc (uint16_t crc , uint8_t data)
{
  //  DBG("++++++++++++ CRC culc start initial CRC:%04X DATA:%04X\n",crc,data);
    for (int i = 0; i < 8; ++i)
    {
        if ((crc / 0x7fff) ^ (data & 0x01))    // Ex-OR input LSB first
        {
            crc = crc ^ 0x4002; // 0100 0000 0000 0010 << 1 
            crc = crc << 1;
            crc ++;
        }
        else
        {
         //   crc = crc *2;    // left shift
            crc = crc << 1;
        }
     //   TEMP = TEMP/2;    // right shift
        data = data >> 1;
    }
 //   DBG("************** CRC culc result  CRC:%04X\n",crc);
    return crc;
}