From ddcc6a77487946ac1a7b2c244f8a05bee5cf2b94 Mon Sep 17 00:00:00 2001
From: lewisxhe <lewishe@outlook.com>
Date: Mon, 29 Apr 2024 14:52:49 +0800
Subject: [PATCH] [TouchDrv] CST816 filter invalid touch points

---
 src/touch/TouchClassCST816.cpp | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/src/touch/TouchClassCST816.cpp b/src/touch/TouchClassCST816.cpp
index 855c7b1..2d7708f 100644
--- a/src/touch/TouchClassCST816.cpp
+++ b/src/touch/TouchClassCST816.cpp
@@ -114,6 +114,12 @@ uint8_t TouchClassCST816::getPoint(int16_t *x_array, int16_t *y_array, uint8_t g
     // }
 
     uint8_t point = buffer[2] & 0x0F;
+
+    // CST816 only supports single touch
+    if (point > 1) {
+        return 0;
+    }
+
 #ifdef LOG_PORT
     LOG_PORT.print("RAW:");
     for (int i = 0; i < 13; ++i) {