From 0c8743b1f778ad95bb67bbf92cde6a9e47e938a1 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Benjamin=20H=C3=B6glinger-Stelzer?= <nefarius@dhmx.at>
Date: Fri, 23 Jul 2021 21:47:15 +0200
Subject: [PATCH] Fixed XI rumble value calculation

---
 sys/DsHidMiniDrv.c | 14 ++++++++++++--
 1 file changed, 12 insertions(+), 2 deletions(-)

diff --git a/sys/DsHidMiniDrv.c b/sys/DsHidMiniDrv.c
index a988dcb9..391118cb 100644
--- a/sys/DsHidMiniDrv.c
+++ b/sys/DsHidMiniDrv.c
@@ -1112,8 +1112,18 @@ DsHidMini_WriteReport(
 	// 
 	if (Packet->reportId == 0x00 && pDevCtx->Configuration.HidDeviceMode == DsHidMiniDeviceModeXInputHIDCompatible)
 	{
-		DS3_SET_LARGE_RUMBLE_STRENGTH(pDevCtx, Packet->reportBuffer[3] / 100 * UCHAR_MAX);
-		DS3_SET_SMALL_RUMBLE_STRENGTH(pDevCtx, Packet->reportBuffer[4] / 100 * UCHAR_MAX);
+		UCHAR lm = (UCHAR)(Packet->reportBuffer[3] / 100.0f * 255.0f);
+		UCHAR rm = (UCHAR)(Packet->reportBuffer[4] / 100.0f * 255.0f);
+		
+		TraceVerbose(
+			TRACE_DSHIDMINIDRV,
+			"-- XI FFB LM: %d, RM: %d",
+			lm,
+			rm
+		);
+		
+		DS3_SET_LARGE_RUMBLE_STRENGTH(pDevCtx, lm);
+		DS3_SET_SMALL_RUMBLE_STRENGTH(pDevCtx, rm);
 
 		(void)Ds_SendOutputReport(pDevCtx, Ds3OutputReportSourceXInputHID);