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-rw-r--r--src/uca.h7
1 files changed, 4 insertions, 3 deletions
diff --git a/src/uca.h b/src/uca.h
index b6466b5..e1e0ae1 100644
--- a/src/uca.h
+++ b/src/uca.h
@@ -131,9 +131,10 @@ enum uca_property_ids {
#define UCA_TIMESTAMP_BINARY 0x02
/* Trigger mode for UCA_PROP_TRIGGER_MODE */
-#define UCA_TRIGGER_AUTO 1 /**< free-run mode */
-#define UCA_TRIGGER_SOFTWARE 2 /**< software trigger via uca_cam_trigger() */
-#define UCA_TRIGGER_EXTERNAL 3 /**< external hardware trigger */
+#define UCA_TRIGGER_AUTO 0 /**< free-run mode */
+#define UCA_TRIGGER_SOFTWARE 1 /**< software trigger via uca_cam_trigger() */
+#define UCA_TRIGGER_EXTERNAL 2 /**< external hardware trigger */
+#define UCA_TRIGGER_EXTERNAL_EXPOSURE 3 /**< hardware trigger controlling exposure */
#define UCA_TRIGGER_EXP_CAMERA 1 /**< camera-controlled exposure time */
#define UCA_TRIGGER_EXP_LEVEL 2 /**< level-controlled (trigger signal) exposure time */