DSCCR

Structure containing information on all counters. This is used for functions operating on 82C54 counters.

Structure Definition

    public struct DSCCR
    {
        public byte control_code;   /* [INPUT] Counter command byte.- Refer Board manual for specifics */

        public byte counter_number; /* [INPUT] Counter number to which the settings are being applied. */

        public uint counter_data;   /* [INPUT] Data to set the counter to */

        public DSCCS counter0;      /* [OUTPUT] Counter 0 data read */

        public DSCCS counter1;      /* [OUTPUT] Counter 1 data read */

        public DSCCS counter2;      /* [OUTPUT] Counter 2 data read */

        public byte control_bit;    /* [INPUT] Used in conjunction with control_code */

        /// DSC_DIO_PORTS_MAX=8
        [System.Runtime.InteropServices.MarshalAsAttribute(System.Runtime.InteropServices.UnmanagedType.ByValArray, SizeConst = 8, ArraySubType = System.Runtime.InteropServices.UnmanagedType.Struct)]
        public DSCCS[] counter;       /* [OUTPUT] Counter 2 data read */

        public int CtrClock;        //Clock source, must be 2 or 3 (see FPGA specification for usage)

        public int CtrOutEn;        //1= enable output onto corresponding I/O pin; 0 = disable output

        public int CtrOutPol;       //1= output pulses high, 0 = output pulses low; only used if CtrOutEn = 1

        public int CtrCountDir;     /*0 = down counting, 1 = up  counting*/

        public int CtrReload;       /*0 = one-shot counting, 1 = auto-reload (repetitive counting, only works in count down mode)*/

        public float Rate;          // Desired output rate, Hz

        public int ctrOutWidth;     // 0-3   0 = 1 clocks, 1 = 10 clocks, 2 = 100 clocks, 3 = 1000 clocks , only used if  CtrOutEn = 1 and CtrClock = 2 or 3

        public int CtrCmd;          /*Counter command, 0-15 (see FPGA specification for available commands)*/

        public int CtrCmdData;      /*Auxiliary data for counter command, 0-3 (see FPGA specification for usage)*/

        public float ActRate;       //Actual rate resulting from the closest divisor available for the desired rate

        public int Start;           //0 = don’t start counter after configuration; 1 = start counter after configuration

        public int GateEn;          //0 = no external gate; 1 = external gate enabled in RMM1616
        
    }

Structure Members

Name	Description	Applicable Boards
control_code	Control code to write to or read from the control word register	Diamond-MM-16RP-AT
counter_number	Selected counter, 0-2	Diamond-MM-16RP-AT
counter_data	Counter divisor value, 0-65535	Diamond-MM-16RP-AT
counter0	Status and data read from counter 0	Diamond-MM-16RP-AT
counter1	Status and data read from counter 1	Diamond-MM-16RP-AT
counter2	Status and data read from counter 2	Diamond-MM-16RP-AT
control_bit	Used in conjunction with control_code	NA
counter[]	Counter 2 data read	NA
CtrClock	Clock source	NA
CtrOutEn	Enable and disable output onto corresponding I/O pin	NA
CtrOutPol	Output pulses high or low only used if CtrOutEn = 1	NA
CtrCountDir	Setting counter direction	NA
CtrReload	Setting auto reload	NA
Rate	Desired output rate, Hz	NA
ctrOutWidth	Counter output width in terms of clock	NA
CtrCmd	Counter commands	NA
CtrCmdData	Auxiliary data for counter command	NA
ActRate	Actual rate resulting from the closest divisor available for the desired rate	NA
Start	To start the counter	NA
GateEn	To enable external gate in RMM1616	NA