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Between Heaven & Hell 2
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1987-03-02
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46 lines
/*
* MAC Version 2.0 Author : Vincent Hayward
* School of Electrical Engineering
* Purdue University
* Dir : h
* File : adc.h
* Remarks : RTI 1250 not completly understood.
* Usage : provide adc conversion macro, set device addr.
*/
/*
* This is the address setting for the RTI 1250
*/
#define UNUSED (short *)0170400
#define GAIN (short *)0170402
#define MADR (short *)0170404
#define DATA (short *)0170406
#define EOC 0100000
/*
* ADCV is a macro to get a conversion done, because of problem
* with the lsi11/23 of VALII it did not seem to work any more when
* we installed VALII, probably a timing problem
* that is why i kept the two versions
*
* ADCV(data, channel)
*/
#ifdef VALII
#define ADCV(d, ch) *MADR = ch; \
*DATA = -1; \
while (*MADR < 0) { \
*MADR = EOC; \
} \
d = *DATA;
#else
#define ADCV(d, ch) *MADR = ch; \
*DATA = -1; \
do { \
*MADR = EOC; \
} while (*MADR > 0); \
d = *DATA;
#endif