39 lines
1.0 KiB
C
39 lines
1.0 KiB
C
/*---------------------------------------------------------------------------
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modbus.h
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Communication routines for Eurotherm ModBus instruments
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Markus Zolliker, Aug 2005
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----------------------------------------------------------------------------*/
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#ifndef MODBUS_H
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#define MODBUS_H
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#include "ease.h"
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#define MODBUS_BAD_CRC -3090
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typedef enum {modBusFloat, modBusInt, modBusTime} ModBusType;
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int ModBusHandler(void *eab);
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void ModBusPutFloats(EaseBase *eab, int adr, int npar, float val[]);
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/* put floats with contiguous adresses */
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void ModBusRequestValues(EaseBase *eab, int adr, int npar);
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/* request floats or time (not int) with contiguous adresses */
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float ModBusGet(EaseBase *eab, int adr, int type);
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/* get value from the ModBusRequestValues command (no int!) */
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void ModBusRequestValue(EaseBase *eab, int adr, int type);
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/* request one value of arbitrary type */
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float ModBusGetValue(EaseBase *eab, int type);
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/* get this value */
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void ModBusPutValue(EaseBase *eab, int adr, int type, float val);
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/* put one value of arbitrary type */
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#endif
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