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| == Examples of Generated Header Files ==
| | This document is now obsolete |
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| May 25 2005
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| <center>
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| == Overview ==
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| </center>
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| Tools are provided to generate header files from the following dbd definitions:
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| *menu
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| *struct
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| *record
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| === menu example ===
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| <tt>menuAlarmSevr.dbd</tt> contains:
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| menu(menuAlarmSevr) {
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| choice(menuAlarmSevrNO_ALARM,"NO_ALARM")
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| choice(menuAlarmSevrMINOR,"MINOR")
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| choice(menuAlarmSevrMAJOR,"MAJOR")
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| choice(menuAlarmSevrINVALID,"INVALID")
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| }
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| <tt>menuAlarmSevr.h</tt> is generated from <tt>menuAlarmSevr.dbd</tt>
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| enum menuAlarmSevr {
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| menuAlarmSevrNO_ALARM,
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| menuAlarmSevrMINOR,
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| menuAlarmSevrMAJOR,
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| menuAlarmSevrINVALID
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| };
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| No interfaces, i.e. code, will be generated for menus.
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| === simple struct example ===
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| This is an example of a struct that only has fields with a known epicsType.
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| <tt>displayLimit.dbd</tt> contains:
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| struct(displayLimit) {
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| field(low,float64)
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| field(high,float64)
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| }
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| <tt>displayLimit.h</tt> is generated from <tt>displayLimit.dbd</tt>
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| class displayLimit {
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| public:
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| epicsFloat64 low;
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| epicsFloat64 high;
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| };
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| const epicsInt16 displayLimit_firstIndex = 1
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| const epicsInt16 displayLimit_low = 1
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| const epicsInt16 displayLimit_high = 2
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| const epicsInt16 displayLimit_lastIndex =displayLimit_high
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| In addition an implementation of interface EpicsStructLifetime will be generated.
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| === simple record example ===
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| This is an example of a record that only has fields with a known epicsType. | |
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| <tt>exampleRecord.dbd</tt> contains:
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| record(example) extends iocRecord {
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| field(value,float64)
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| field(displayLimit,struct(displayLimit))
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| field(info,string)
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| field(arr,array(double[]))
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| }
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| <tt>exampleRecord.h</tt> is generated from <tt>exampleRecord.dbd</tt>
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| class exampleRecord : public iocRecord{
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| public:
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| epicsFloat64 value;
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| EpicsStruct displayLimit;
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| EpicsString info;
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| EpicaArray arr;
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|
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| private:
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| void *recordSupportPvt;
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| };
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|
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| const epicsInt16 example_firstIndex = 1001001
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| const epicsInt16 example_value = 1001001;
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| const epicsInt16 example_displayLimit = 1001002;
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| const epicsInt16 example_info = 1001003;
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| const epicsInt16 example_arr = 1001004;
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| const epicsInt16 example_lastIndex = example_arr;
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| In addition an implementation of interface StructDbdLifetime
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| will be generated.
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| Code that implements interface RecordDbdSupport must be created.
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| === record with link, and device ===
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| Assume that the following has been defined:
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| struct(vmeLink) {
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| field(card,uint16)
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| field(signal,uint16)
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| field(parm,string)
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| }
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| device(in,analogIO,SomeVMEdevice,vmeLink)
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| <tt>ioRecord.dbd</tt> contains:
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| record(io) extends iocRecord {
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| field(out, device(out,analogIO))
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| field(desiredOutputLink, link(in))
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| }
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| <tt>ioRecord.h</tt> is generated from <tt>ioRecord.dbd</tt>
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| class ioRecord : public iocRecord{
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| public:
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| DbfDevice out;
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| DbfLink desiredOutputLink;
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| private:
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| void *recordSupportPvt;
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| };
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| const epicsInt16 io_firstIndex = 1001001
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| const epicsInt16 io_out = 1001001;
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| const epicsInt16 io_desiredOutputLink = 1001002;
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| const epicsInt16 io_lastIndex = io_desiredOutputLink
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| === menu and enum and array and struct that are not epicsType ===
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| <tt>someRecord.dbd</tt> contains:
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| struct(inpLink) {
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| field(link,link(in))
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| field(value,float64)
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| }
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| record(some) extends iocRecord {
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| field(fmenu,menu(menuConverty))
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| field(stateNames,array(string[]))
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| field(fenum,enum(stateNames))
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| field(flink,link(dir))
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| field(fdevice,device(dir,interfaceName))
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| field(inp,struct(inpLink))
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| field(inparray,array(struct(inpLink)[]))
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| }
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| === Generated Header Files ===
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| <tt>someRecord.h</tt> is generated from <tt>someRecord.dbd</tt>
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| class someRecord : public iocRecord{
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| public:
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| DbfMenu fmenu;
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| EpicsArray stateNames;
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| DbfEnum fenum
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| DbfLink flink;
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| DbfDevice fdevice;
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| DbfStruct inp;
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| DbfArray inparray;
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| private:
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| void *recordSupportPvt;
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| };
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|
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| const epicsInt16 some_firstIndex = 1001001;
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| const epicsInt16 some_fmenu = 1001002;
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| const epicsInt16 some_stateNames = 1001003;
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| const epicsInt16 some_fenum = 1001004;
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| const epicsInt16 some_flink = 1001005;
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| const epicsInt16 some_fdevice = 1001006;
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| const epicsInt16 some_inp = 1001007;
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| const epicsInt16 some_inparray = 1001008;
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| const epicsInt16 some_lastIndex = some_inparray
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| ----
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