FracSynthControlWord.c File Reference

#include <stdlib.h>
#include <stdio.h>
#include <errno.h>
#include <epicsTypes.h>
#include <debugPrint.h>
#include <mrfCommon.h>
#include <epicsExport.h>
#include <mrfFracSynth.h>
#include <mrfFracSynth.c>

Include dependency graph for FracSynthControlWord.c:

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Macros
#define	HOST_BUILD

Functions
int	main (int argc, char *argv[])

Macro Definition Documentation

HOST_BUILD

#define HOST_BUILD

Definition at line 92 of file FracSynthControlWord.c.

Function Documentation

main()

int main	(	int	argc,
		char *	argv[]
	)

Definition at line 103 of file FracSynthControlWord.c.

                                  {

   /*---------------------
    * Local Variables
    */
    int   badArgs = 1;         /* True if we could not parse the argument list   */
    epicsUInt32    controlWord = 0;             /* Genearated SY87739L control word               */
    epicsFloat64   DesiredFreq;                 /* Frequency we wish to create a control word for */
    epicsFloat64   EffectiveFreq;               /* Freq. actually generated by the control word   */
    epicsFloat64   Error;                       /* Error between the desired and actual freqs.    */
    char          *tailPtr;                     /* Pointer to tail of parsed control word string  */

   /*---------------------
    * Make sure we were passed only one argument.
    * If so, see if we can parse it as a floating point value.
    */
    if (argc == 2) {
        DesiredFreq = strtod (argv[1], &tailPtr);

       /*---------------------
        * If we successfully parsed the desired frequency,
        * try to compute a control word that will generate it.
        */
        if ((errno == OK) && (tailPtr != argv[1])) {
            controlWord = FracSynthControlWord (DesiredFreq, MRF_FRAC_SYNTH_REF, DP_NONE, &Error);
            badArgs = 0;

           /*---------------------
            * Abort if we could not successfully create a control word for this frequency
            */
            if (controlWord == 0) {
                printf ("Unable to create a control word for %f MHz.\n", DesiredFreq);
                return ERROR;
            }/*end if could not create control word*/

           /*---------------------
            * Compute the effective frequency generated by the control word we created and
            * check it for errors (we don't expect any errors, since we created it, but
            * you never know....)
            */
            EffectiveFreq = FracSynthAnalyze (controlWord, MRF_FRAC_SYNTH_REF, DP_ERROR);

           /*---------------------
            * Display the control word, the effective frequency, and the error.
            */
            printf ("Control Word = 0x%08X.\n", controlWord);
            printf ("Desired Frequency = %f Mhz.  Effective Frequency = %f MHz. ",
                    DesiredFreq, EffectiveFreq);
            printf ("Error = %5.3f ppm.\n", Error);

        }/*end if control word parse was successful*/

    }/*end if we had the right number of arguments*/

   /*---------------------
    * Print the "Usage" message if we could not parse the argument.
    */
    if (badArgs) {
        printf ("Usage:\n");
        printf ("FracSynthControlWord <DesiredFreq>\n");
        printf ("  Where <DesiredFreq> is the frequency (in MegaHertz)\n");
        printf ("  that you wish to generate an SY87739L control word for.\n");
    }/*end if could not parse arguments*/

   /*---------------------
    * Always return success.
    */
    return OK;

}/*end main()*/