Esempio
int esitoGv U32 locInt real locReal struct structValori int nValori real valore[10] end_struct structValori raised structValori somme int GVInterf_int int GVInterf_real int GVInterf_raised int GVInterf_sum int nVal string gvname ... ... ... locInt = 3 locReal = 7.23 raised.nValori = 0 somme.nValori = 0 ... ... ... gvname = "Global Integer 1" IF (GV_EXIST(gvname)) esitoGV = GV_LINK (gvname, sizeof(int), "", GVInterf_int, locInt) ELSE esitoGV = GV_CREATE (gvname, "int", sizeof(int), "", 0x8, GVInterf_int, locInt) ENDIF SELECT (esitoGV) CASE 0 ; link connection done BREAK CASE 1 ; link done but the variable was locked, so we want to wait until we are able to read ... WHILE (true) IF (GV_READ(GVInterf_int) = 0) BREAK ; ok th e local copy ahs benn updated. ENDIF END_WHILE BREAK DEFAULT ALARM_SET (5000, 0, 1, esitoGV ) END_SELECT gvname = "Global Real 1" ; variabile persistente IF (GV_EXIST(gvname)) esitoGV = GV_LINK (gvname, sizeof(real), "", GVInterf_real, locReal) ELSE esitoGV = GV_CREATE (gvname, "real", sizeof(real), "", 0x1, GVInterf_real, locReal) ENDIF SELECT (esitoGV) CASE 0 ; link connection done BREAK CASE 1 ; link done but the variable was locked, so we want to wait until we are able to read ... WHILE (true) IF (GV_READ(GVInterf_real) = 0) BREAK ; ok th e local copy has been updated. ENDIF END_WHILE BREAK DEFAULT ALARM_SET (5000, 0, 2, esitoGV ) END_SELECT gvname = "Global structValori raised" ; variabile persistente IF (GV_EXIST(gvname)) esitoGV = GV_LINK (gvname, sizeof(structValori), "", GVInterf_raised, raised) ELSE esitoGV = GV_CREATE (gvname, "struct structValori RAISED", sizeof(structValori), "", 0x1, GVInterf_raised, raised) ENDIF SELECT (esitoGV) CASE 0 ; link connection done BREAK CASE 1 ; link done but the variable was locked, so we want to wait until we are able to read ... WHILE (true) IF (GV_READ(GVInterf_raised) = 0) BREAK ; ok th e local copy has been updated. ENDIF END_WHILE BREAK DEFAULT ALARM_SET (5000, 0, 3, esitoGV ) END_SELECT gvname = "Global structValori sum" ; variabile persistente IF (GV_EXIST(gvname)) esitoGV = GV_LINK (gvname, sizeof(structValori), "", GVInterf_sum, somme) ELSE esitoGV = GV_CREATE (gvname, "struct structValori SUM", sizeof(structValori), "", 0x1, GVInterf_sum, somme) ENDIF SELECT (esitoGV) CASE 0 ; link connection done BREAK CASE 1 ; link done but the variable was locked, so we want to wait until we are able to read ... WHILE (true) IF (GV_READ(GVInterf_sum) = 0) BREAK ; ok th e local copy has been updated. ENDIF END_WHILE BREAK DEFAULT ALARM_SET (5000, 0, 3, esitoGV ) END_SELECT ; lock the access to the varaible to the other tasks WHILE (NOT GV_LOCK(GVInterf_raised)) END_WHILE ; this structure is used to hold the power of the number hold in RR(23) , number of raise is specidied in RR(22) esitoGV = GV_READ (GVInterf_raised) ; update the structure IF (esitoGV = 0) raised.nValori = IN_RANGE (RR(22), 1.0, 10.0) ; number of desired power (1 up to ten) raised.valore[0] = RR(23) FOR (nVal = 1 , nVal < raised.nValori, INC(nVAL)) raised.valore[nVal] = raised.valore[nVal-1] * raised.valore[0]; ; compute new power ENDFOR ; update the structure esitoGV = GV_WRITE (GVInterf_raised) ; update the structure IF (esitoGV < 0) ALARM_SET (5000, 0, 4, esitoGV ) ENDIF ENDIF ; IF (esitoGV > 0) GV_UNLOCK (GVInterf_raised) ; the same structure is used in different way, the nValori is used to specify which element we have to use esitoGV = GV_PARTIAL_READ (GVInterf_sum, 0, sizeof(somme.nValori)) ; update the structure element nValori IF (esitoGV = 0) if (RANGE(somme.nValori , 0, 10-1)) nVal = somme.nValori somme.valore[nVal] = RR (23) + nVal esitoGV = GV_WRITE_PARTIAL (GVInterf_sum, sizeof(somme.nValori)+ sizeof(real)*nVal, sizeof(real)) ; update only the desired informatiion IF (esitoGV < 0) ALARM_SET (5000, 0, 5, esitoGV ) ENDIF somme.nValori = -1; esitoGV = GV_WRITE_PARTIAL (GVInterf_sum, 0, sizeof(somme.nValori)) ; reset update only one information IF (esitoGV < 0) ALARM_SET (5000, 0, 5, esitoGV ) ENDIF ENDIF ENDIF ... ... |
