Added GT911 Home Button function

lewisxhe · Jun 4, 2024 · b474b4b · b474b4b
1 parent 6635f0f
commit b474b4b
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Showing 2 changed files with 31 additions and 6 deletions.
diff --git a/src/REG/GT911Constants.h b/src/REG/GT911Constants.h
@@ -153,4 +153,11 @@
 #define GT911_POINT_2                 (0X8157)
 #define GT911_POINT_3                 (0X815F)
 #define GT911_POINT_4                 (0X8167)
-#define GT911_POINT_5                 (0X816F)
+#define GT911_POINT_5                 (0X816F)
+
+
+#define GT911_GET_POINT(x)                  (x & 0x0F)
+#define GT911_GET_BUFFER_STATUS(x)          (x & 0x80)
+#define GT911_GET_HAVE_KEY(x)               (x & 0x10)
+
+
diff --git a/src/TouchDrvGT911.hpp b/src/TouchDrvGT911.hpp
@@ -143,9 +143,9 @@ class TouchDrvGT911 :
         writeCommand(0x05);
 
         /*
-        * Depending on the chip and platform, setting it to input after removing sleep will affect power consumption. 
+        * Depending on the chip and platform, setting it to input after removing sleep will affect power consumption.
         * The chip platform determines whether
-        * 
+        *
         * * */
         // if (__irq != SENSOR_PIN_NONE) {
         //     this->setGpioLevel(__irq, INPUT);
@@ -184,7 +184,19 @@ class TouchDrvGT911 :
         if (!x_array || !y_array || size == 0)
             return 0;
 
-        touchPoint = getPoint();
+        uint8_t val = readGT911(GT911_POINT_INFO);
+
+        bool haveKey = GT911_GET_HAVE_KEY(val);
+        // bool bufferStatus = GT911_GET_BUFFER_STATUS(val);
+        // log_i("REG:0x%X S:0X%d K:%d\n", val,bufferStatus,haveKey);
+
+        if (__homeButtonCb && haveKey) {
+            __homeButtonCb(__userData);
+        }
+
+        clearBuffer();
+
+        touchPoint = GT911_GET_POINT(val);
         if (touchPoint == 0) {
             return 0;
         }
@@ -261,9 +273,9 @@ class TouchDrvGT911 :
     uint8_t getPoint()
     {
         // GT911_POINT_INFO 0X814E
-        uint8_t val = readGT911(GT911_POINT_INFO) & 0x0F;
+        uint8_t val = readGT911(GT911_POINT_INFO);
         clearBuffer();
-        return val & 0x0F;
+        return GT911_GET_POINT(val);
     }
 
 
@@ -323,6 +335,12 @@ class TouchDrvGT911 :
         SensorCommon::setGpioReadCallback(read_cb);
     }
 
+    void setHomeButtonCallback(home_button_callback_t cb, void *user_data)
+    {
+        __homeButtonCb = cb;
+        __userData = user_data;
+    }
+
 private:
 
     uint8_t readGT911(uint16_t cmd)