emwin 之使用键盘数据发送函数的注意事项

Posted 2020-12-28 skullboyer

@2018-08-08

小记

　　键盘实现时，在发送键值时， 函数 GUI_SendKeyMsg(GUI_KEY_BACKSPACE, Pressed) 的参数 Pressed 在按键按下状态的 case 语句后无 break，此方法参考至官方的模拟器中的键盘实例，加上 break 会导致键盘无响应结果

 1 case ID_BUTTON_13: // Notifications sent by ‘<- -Button‘
 2       switch(NCode) {
 3       case WM_NOTIFICATION_CLICKED:
 4         // USER START (Optionally insert code for reacting on notification message)
 5       
 6         Pressed = 1;
 7       
 8         // USER END
 9       case WM_NOTIFICATION_RELEASED:
10         // USER START (Optionally insert code for reacting on notification message)
11       
12         GUI_SendKeyMsg(GUI_KEY_BACKSPACE, Pressed);
13       
14         // USER END
15         break;
16       // USER START (Optionally insert additional code for further notification handling)
17       // USER END
18       }
19       break;