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3.2 Abrufen-Funktionen
Der PC kann bestimmte Informationen vom Anzeigegerät abrufen. Ein Abrufen-Paket
besteht ähnlich wie ein Festlegen-Paket aus 9 Bytes. Beachten Sie, dass das Wert-
Byte grundsätzlich 00 enthält.
Festlegen-Funktionsbeschreibung:
Länge: Paket-Gesamtlänge ohne „CR“ in Bytes
ID: Identifizierung einzelner Anzeigegeräte
Befehlstyp: Befehlstyp identifizieren,
„g“ (0x67h): Abrufen-Befehl
„r“ (0x72h): Befehl-gültig-Antwort
„-“ (0x2Dh): Befehl-ungültig-Antwort
Befehl: Befehlscode: Ein-Byte-ASCII-Code
Wert (1 – 3): 3-Bytes-ASCII-Code zur Wertdefinition
CR: 0x0D
Abrufen-Funktionsformat:
Senden: (Befehlstyp: „g“)
Name Länge ID Befehlstyp Befehl Wert 1 Wert 2 Wert 3 CR
Byteanzahl 1 Byte 2 Bytes 1 Byte 1 Byte 1 Byte 1 Byte 1 Byte 1 Byte
Bytereihen-
folge
1 2~3 4 5 6 7 8 9
Antwort: (Befehlstyp: „r“ oder „-“)
Bei gültigem Befehl – Befehlstyp: „r“
Name Länge ID Befehlstyp Befehl Wert 1 Wert 2 Wert 3 CR
Byteanzahl 1 Byte 2 Bytes 1 Byte 1 Byte 1 Byte 1 Byte 1 Byte 1 Byte
Bytereihen-
folge
1 2~3 4 5 6 7 8 9
Bei ungültigem Befehl – Befehlstyp: „-“
Name Länge ID Befehlstyp CR
Byteanzahl 1 Byte 2 Bytes 1 Byte 1 Byte
Bytereihen-
folge
1 2~3 4 5
Beispiel 1: Helligkeit von TV-05 abrufen; dieser Befehl ist gültig.
Der Helligkeitswert ist 67.
Senden (Hexadezimalformat)
Name Länge ID Befehlstyp Befehl Wert 1 Wert 2 Wert 3 CR
Hex
0x38
0x30
0x35
0x67 0x62 0x30 0x30 0x30 0x0D
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