24/7 Data Acquisition Wildcard Users Guide

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FORTH: Reset_AD24 ( -- )
C: void Reset_AD24 ( void )

Resets the digital filter, the analog modulator, and the on-chip registers of the analog to digital converter, disconnects all analog field inputs (not including the reference inputs), turns the input buffer off, and stops conversion operations. Start_Conversion or Start_Conv_With_Values must be executed after this routine is called to start another conversion.

FORTH: Software_Reset ( -- )
C: void Software_Reset ( void )

Resets the serial interface of the analog to digital converter to a known state. This routine does not reset contents of any registers but if the interface was lost, it is advisable to set up all registers again using Start_Conversion or Start_Conv_With_Values. This routine does not disconnect the analog field inputs from the analog to digital converter or turn the buffer off.

FORTH: Start_Conv_With_Values ( ud1\ud2\u\b1\b2\b3\b4\b5\b6 -- )
C: void Start_Conv_With_Values ( ulong fs_cal_val, ulong zero_cal_val, uint freq_int, char gain, char pol, char res, char bo, char fysnc, char ch )

Starts a conversion without a calibration. This routine loads the calibration registers with the specified calibration values and options and starts a conversion. It interrupts the A/D from its current operation, reconfigures it, and commences repetitive conversions. Init_AD24, Use_Onboard_Ref orUse_External_Ref, and Start_Conversion must be called prior to this routine to initialize, configure, and calibrate the 24/7 Data Acquisition Wildcard. This routine can be used only if a calibration has already been performed on the specified channel with the specified settings and the calibration values have been recorded. This will save up to 10 x sample rate on the first conversion because no calibration is performed. No error checking is done to validate the input parameters to allow for fast execution when switching between channels. The parameters and their allowed values are provided in the following table:

AD24_Sample should be called after this routine to fetch conversion results. This routine is not re-entrant. If used in a multitasking system, ensure that only one task calls this routine or that separate tasks do not use the AD7714 at the same time. This routine takes 2.34 ms to start a conversion and 7.00 ms to execute.

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