OSTC4/5 joined code: In the previous version code differences between OSTC4/5 were identified using the ENABLE_GPIO_V2 compiler switch. In the new version this is done using the display version as indicator which OSTC model is in used. Since this is detected by Firmware the information is forwarded from there to the RTE. This causes a little delay in the GPIO initialization but this applies only to the cold start of the RTE which should not happen very often.

--- a/Common/Inc/data_exchange.h	Sun Apr 06 21:02:17 2025 +0200
+++ b/Common/Inc/data_exchange.h	Tue Apr 08 15:10:14 2025 +0200
@@ -339,7 +339,7 @@
 
 	uint8_t revisionHardware;
 	uint8_t revisionCRCx0x7A;
-	uint8_t spare1_3;
+	uint8_t displayVersion;
 	uint8_t spare1_4;
 
 	uint8_t setAccidentFlag;