Hardcoded USB HID SNES gamepad support.

Author: espzav

components/esp_nes/osd.c

@@ -47,25 +47,17 @@ typedef struct {
 } app_usb_hid_event_t;
 
 typedef struct
-{
-    uint8_t reserved1;
-    uint8_t reserved2;
-    
+{    
     bool    btn_select:1;
-    bool    btn_res1:1;
-    bool    btn_res2:1;
     bool    btn_start:1;
     bool    btn_up:1;
-    bool    btn_right:1;
     bool    btn_down:1;
+    bool    btn_right:1;
     bool    btn_left:1;
-    
-    bool    btn_res3:4;
-    bool    btn_triangle:1;
-    bool    btn_circle:1;
-    bool    btn_cross:1;
-    bool    btn_square:1;
-} __attribute__((packed)) gamepad_t;
+
+    bool    btn_a:1;
+    bool    btn_b:1;
+} gamepad_t;
 
 /*******************************************************************************
 * Function definitions
@@ -253,22 +245,22 @@ void osd_getinput(void)
       }
    }
 
-   if(app_gamepad_tmp.btn_cross != app_gamepad.btn_cross)
+   if(app_gamepad_tmp.btn_a != app_gamepad.btn_a)
    {
-      pressed = (app_gamepad.btn_cross ? INP_STATE_MAKE : INP_STATE_BREAK);
+      pressed = (app_gamepad.btn_a ? INP_STATE_MAKE : INP_STATE_BREAK);
       evh = event_get(event_joypad1_a);
-      app_gamepad_tmp.btn_cross = app_gamepad.btn_cross;
+      app_gamepad_tmp.btn_a = app_gamepad.btn_a;
 
       if(evh) {
          evh(pressed);
       }
    }
 
-   if(app_gamepad_tmp.btn_circle != app_gamepad.btn_circle)
+   if(app_gamepad_tmp.btn_b != app_gamepad.btn_b)
    {
-      pressed = (app_gamepad.btn_circle ? INP_STATE_MAKE : INP_STATE_BREAK);
+      pressed = (app_gamepad.btn_b ? INP_STATE_MAKE : INP_STATE_BREAK);
       evh = event_get(event_joypad1_b);
-      app_gamepad_tmp.btn_circle = app_gamepad.btn_circle;
+      app_gamepad_tmp.btn_b = app_gamepad.btn_b;
 
       if(evh) {
          evh(pressed);
@@ -384,12 +376,22 @@ static void app_usb_hid_host_interface_callback(hid_host_device_handle_t hid_dev
       data = hid_host_device_get_data(hid_device_handle, &data_length);
       if (dev->proto == HID_PROTOCOL_NONE) {
          gamepad_t *gamepad = (gamepad_t*)data;
-         if (data_length < 1) {
+         if (data_length < 8) {
                break;
          }
-         memcpy(&app_gamepad, gamepad, sizeof(gamepad_t));
+
+         app_gamepad.btn_up = (data[1] == 0x00 ? true : false);
+         app_gamepad.btn_down = (data[1] == 0xFF ? true : false);
+         app_gamepad.btn_left = (data[0] == 0x00 ? true : false);
+         app_gamepad.btn_right = (data[0] == 0xFF ? true : false);
+
+         app_gamepad.btn_select = (data[6]&0x10 ? true : false);
+         app_gamepad.btn_start = (data[6]&0x20 ? true : false);
+         app_gamepad.btn_a = (data[5]&0x20 ? true : false);
+         app_gamepad.btn_b = (data[5]&0x40 ? true : false);
+
          osd_getinput();
-         //ESP_LOGW(TAG, "Gamepad... len: %d; 0x%02x 0x%02x 0x%02x 0x%02x ", data_length, data[0], data[1], data[2], data[3]);
+         //ESP_LOGW(TAG, "Gamepad... len: %d; 0x%02x 0x%02x 0x%02x 0x%02x 0x%02x 0x%02x 0x%02x 0x%02x", data_length, data[0], data[1], data[2], data[3], data[4], data[5], data[6], data[7]);
       }
       break;
    case HID_HOST_INTERFACE_EVENT_TRANSFER_ERROR: