GD32F450_BMC_BaseCode/app/bmc/util.c

#include "Util.h"
#include <sys/sysinfo.h> 


/*----------------------------------------
 * GetBits
 *----------------------------------------*/
INT8U
GetBits (INT8U Val, INT8U Mask)
{
    INT8U ExtVal = 0;
    while (0 != Mask)
    {
        if (0 != (Mask & 0x80))
        {
            ExtVal <<= 1;
            if (0 != (Val & 0x80)) { ExtVal += 0x01; }
        }

        Val <<= 1;
        Mask <<= 1;
    }

    return ExtVal;
}

/*------------------------------------------
 * SetBits
 *------------------------------------------*/
INT8U
SetBits (INT8U Mask, INT8U Val)
{
    INT8U FinVal = 0;
    INT8U i;

    for (i = 0; i < 8; i++)
    {
        FinVal >>= 1;
        if (0 != (Mask & 0x01))
        {
            if (0 != (Val & 0x01)) { FinVal |= 0x80; }
                Val >>= 1;
        }
        Mask   >>= 1;
    }

    return FinVal;
}

/*------------------------------------------
 * CalculateCheckSum
 *------------------------------------------*/
INT8U
CalculateCheckSum (INT8U* Data, INT16U Len)
{
    INT8U   Sum;
    INT16U  i;

    Sum = 0;
    for (i = 0; i < Len; i++)
    {
        Sum += Data [i];
    }
    return (0x100 - Sum);
}

/*
* @fn TimeUpdate
* @return Returns the system uptime
*/
INT32U TimeUpdate()
{
    struct sysinfo time;
    sysinfo(&time);
    return time.uptime;
}

/**
*@fn GetSysCtlvalue
*@brief This function retrieves the values from Sysctl
*@param TagName -Tagname form which value has to be retrieved
*@param SysVal - Where the value is stored
*@return Returns 0 on success
*            Returns 1 on failure
*/
int GetJiffySysCtlvalue (const char *TagName, long long *SysVal)
{
    unsigned long RetVal;
    FILE* SysFile = fopen (TagName, "r");
    unsigned long Hertz = sysconf(_SC_CLK_TCK);

    if ((!SysFile) || (!SysVal))
        return 1;

    fscanf (SysFile, "%lu", &RetVal);
    fclose (SysFile);

    *SysVal = (RetVal*1000)/Hertz;
    return 0;
}