#include <os_internal.h>

u8 __osContAddressCrc(u16 addr)
{
    u8 temp;
    u8 temp2;
    int i;
    temp = 0;
    for (i = 0; i < 16; i++)
    {
        if (temp & 0x10)
            temp2 = 21;
        else
            temp2 = 0;

        temp <<= 1;
        temp |= (u8)((addr & 0x400) ? 1 : 0);
        addr <<= 1;
        temp ^= temp2;
    }
    return temp & 0x1f;
}
u8 __osContDataCrc(u8 *data)
{
    u8 temp;
    u8 temp2;
    int i;
    int j;
    temp = 0;
    for (i = 0; i <= 32; i++, data++)
    {
        for (j = 7; j >= 0; j--)
        {
            if (temp & 0x80)
                temp2 = 133;
            else
                temp2 = 0;
            temp <<= 1;
            if (i == 32)
                temp &= -1;
            else
                temp |= ((*data & (1 << j)) ? 1 : 0);
            temp ^= temp2;
        }
    }
    return temp;
}