Merge pull request #1036 from dmazzella/patch-2

[Arduino H7 Video Librari] Get the status of the display

Author: leonardocavagnis

libraries/Arduino_H7_Video/docs/api.md

@@ -14,6 +14,7 @@ The main class for managing the video controller and the display.
 | `public ` [`Arduino_H7_Video`](#public-arduino_h7_videoint-width-int-height-h7displayshield-shield) | Construct a new Arduino_H7_Video object with the specified width, height, and display shield. |
 | `public int` [`begin`](#public-int-begin) | Initialize the video controller and display. |
 | `public void` [`end`](#public-void-end) | De-initialize the video controller and display. |
+| `public bool` [`detect`](#public-bool-detect) | Checks if the display is connected. |
 | `public int` [`width`](#public-int-width) | Get the width of the display. |
 | `public int` [`height`](#public-int-height) | Get the height of the display. |
 | `public bool` [`isRotated`](#public-bool-isrotated) | Check if the display is rotated. |
@@ -54,6 +55,15 @@ De-initialize the video controller and display.
 
 ---
 
+### `public bool` [`detect`](#)`()`
+
+Checks if the display is connected.
+
+#### Returns
+`bool`: True if the display is connected, False otherwis.
+
+---
+
 ### `public int` [`width`](#)`()`
 
 Get the width of the display.

libraries/Arduino_H7_Video/src/Arduino_H7_Video.cpp

@@ -179,6 +179,11 @@ bool Arduino_H7_Video::isRotated() {
   return _rotated;
 }
 
+bool Arduino_H7_Video::detect()
+{
+  return (_shield->getStatus() > 0);
+}
+
 void Arduino_H7_Video::end() {
 #ifdef HAS_ARDUINOGRAPHICS
   ArduinoGraphics::end();

libraries/Arduino_H7_Video/src/Arduino_H7_Video.h

@@ -106,6 +106,13 @@ class Arduino_H7_Video
    */
   bool isRotated();
 
+  /**
+   * @brief Checks if the display is connected.  
+   * 
+   * @return true if the display is connected, false otherwise. 
+   */
+   bool detect();
+
 #ifdef HAS_ARDUINOGRAPHICS
   /**
    * @brief Clear the display.

libraries/Arduino_H7_Video/src/H7DisplayShield.cpp

@@ -18,6 +18,10 @@ int GigaDisplayShieldClass::getEdidMode(int h, int v) {
     return EDID_MODE_480x800_60Hz;
 }
 
+int GigaDisplayShieldClass::getStatus() {
+    return 1; // TODO: Not implemented;
+}
+
 int USBCVideoClass::init(int edidmode) {
     struct edid recognized_edid;
     int err_code = 0;
@@ -57,5 +61,11 @@ int USBCVideoClass::getEdidMode(int h, int v) {
     return edidmode;
 }
 
+int USBCVideoClass::getStatus() {
+    int detected = anx7625_get_hpd_event(0);
+
+    return detected;
+}
+
 GigaDisplayShieldClass GigaDisplayShield;
 USBCVideoClass USBCVideo;

libraries/Arduino_H7_Video/src/H7DisplayShield.h

@@ -5,18 +5,21 @@ class H7DisplayShield {
     public:
         virtual int init(int edidmode) = 0;
         virtual int getEdidMode(int h, int v);
+        virtual int getStatus();
 };
 
 class GigaDisplayShieldClass : public H7DisplayShield {
     public:
         int init(int edidmode);
         int getEdidMode(int h, int v);
+        int getStatus();
 };
 
 class USBCVideoClass : public H7DisplayShield {
     public:
         int init(int edidmode);
         int getEdidMode(int h, int v);
+        int getStatus();
 };
 
 extern GigaDisplayShieldClass GigaDisplayShield;

libraries/Arduino_H7_Video/src/anx7625.cpp

@@ -630,6 +630,11 @@ bool anx7625_is_power_provider(uint8_t bus) {
 	}
 }
 
+int anx7625_get_hpd_event(uint8_t bus)  {
+	int ret = anx7625_hpd_change_detect(bus);
+	return ret;
+}
+
 int i2c_writeb(uint8_t bus, uint8_t saddr, uint8_t offset, uint8_t val) {
 	char cmd[2];
 	cmd[0] = offset;

libraries/Arduino_H7_Video/src/anx7625.h

@@ -24,5 +24,6 @@ int 	anx7625_wait_hpd_event(uint8_t bus);
 int 	anx7625_get_cc_status(uint8_t bus, uint8_t *cc_status);
 int 	anx7625_read_system_status(uint8_t bus, uint8_t *sys_status);
 bool 	anx7625_is_power_provider(uint8_t bus);
+int 	anx7625_get_hpd_event(uint8_t bus);
 
 #endif  /* _ANX7625_H */