-#define DS_CMD_START 0xb2
-#define DS_CMD_FPGA_FW 0xb3
-#define DS_CMD_CONFIG 0xb4
+#define DS_CMD_START 0xb2
+#define DS_CMD_FPGA_FW 0xb3
+#define DS_CMD_CONFIG 0xb4
+#define DS_CMD_VTH 0xb8
+
+#define DS_NUM_TRIGGER_STAGES 16
+#define DS_START_FLAGS_STOP (1 << 7)
+#define DS_START_FLAGS_CLK_48MHZ (1 << 6)
+#define DS_START_FLAGS_SAMPLE_WIDE (1 << 5)
+#define DS_START_FLAGS_MODE_LA (1 << 4)