使用STM32CubeMX生成USB_HOST_HID工程[添加对CAPS_LOCK指示灯的控制][SetReport]

在之前(使用STM32CubeMX生成USB_HOST_HID工程)的基础上进行修改

在结合之前在pc上的测试 USB之HID类Set_Report Request[调试手记1]

测试代码如下：

/* USER CODE BEGIN 1 */
void USBH_HID_EventCallback(USBH_HandleTypeDef *phost)
{
   HID_TypeTypeDef   type = HID_UNKNOWN;
   
   USBH_ErrLog("USBH_HID_EventCallback");
   
   type = USBH_HID_GetDeviceType(phost);
   
   switch(type)
   {
       case HID_KEYBOARD:
       {
            HID_KEYBD_Info_TypeDef *keyboard_info;            
            char ascii;
            uint8_t reportBuff[1];
      static uint8_t led_flag =0;
            
            keyboard_info = USBH_HID_GetKeybdInfo(phost);

            if( keyboard_info != NULL )
            {
                ascii = USBH_HID_GetASCIICode(keyboard_info);
                if( ascii != 0 )
                {
                    USBH_UsrLog("%c",ascii);
                }
                
//                USBH_UsrLog("state %x",keyboard_info->state);
//                USBH_UsrLog("lctrl %x",keyboard_info->lctrl);
//                USBH_UsrLog("lshift %x",keyboard_info->lshift);
//                USBH_UsrLog("lalt %x",keyboard_info->lalt);
//                USBH_UsrLog("lgui %x",keyboard_info->lgui);
//                USBH_UsrLog("rctrl %x",keyboard_info->rctrl);
//                USBH_UsrLog("rshift %x",keyboard_info->rshift);
//                USBH_UsrLog("rgui %x",keyboard_info->rgui);
                
                USBH_UsrLog("keys[6] %x %x %x %x %x %x ",keyboard_info->keys[0],
                                                         keyboard_info->keys[1],
                                                         keyboard_info->keys[2],
                                                         keyboard_info->keys[3],
                                                         keyboard_info->keys[4],
                                                         keyboard_info->keys[5]);
                
                if(keyboard_info->keys[0] == 0x39)
                {
                    led_flag=~led_flag;
                    if(led_flag)
                    {
                        reportBuff[0] = 0X02;
                        USBH_HID_SetReport (phost,2,0,reportBuff,1);
                        USBH_UsrLog("reportBuff %02x ",reportBuff[0]);
                    }
                    else
                    {
                        reportBuff[0] = 0X00;
                        USBH_HID_SetReport (phost,2,0,reportBuff,1);
                        USBH_UsrLog("reportBuff %02x ",reportBuff[0]);
                    }

                }
                
            }
            



       }     
       break;
       
       case HID_MOUSE:
       {  
           HID_MOUSE_Info_TypeDef *mouse_info;
           
           mouse_info = USBH_HID_GetMouseInfo(phost);
           USBH_UsrLog("mouse_info X%d, Y%d ,button %d %d %d",mouse_info->x,mouse_info->y,mouse_info->buttons[2],mouse_info->buttons[1],mouse_info->buttons[0]);
       }
       break;
       
       default:
       break;
   }
}
/* USER CODE END 1 */

通过capslock按键按下和释放等可以看到CAPS_LOCK指示灯变化。但是会发现需要按多次才能翻转CAPS_LOCK指示灯。

而我们在rtt中可以看到我们赋值reportBuff正常变化。

 我们继续给USBH_HID_SetReport的返回结果加log信息。

/* USER CODE BEGIN 1 */
void USBH_HID_EventCallback(USBH_HandleTypeDef *phost)
{
   HID_TypeTypeDef   type = HID_UNKNOWN;
   
   USBH_ErrLog("USBH_HID_EventCallback");
   
   type = USBH_HID_GetDeviceType(phost);
   
   switch(type)
   {
       case HID_KEYBOARD:
       {
            HID_KEYBD_Info_TypeDef *keyboard_info;            
            char ascii;
            uint8_t reportBuff[1];
            USBH_StatusTypeDef status         = USBH_BUSY;
            static uint8_t led_flag =0;
            
            keyboard_info = USBH_HID_GetKeybdInfo(phost);

            if( keyboard_info != NULL )
            {
                ascii = USBH_HID_GetASCIICode(keyboard_info);
                if( ascii != 0 )
                {
                    USBH_UsrLog("%c",ascii);
                }
                
//                USBH_UsrLog("state %x",keyboard_info->state);
//                USBH_UsrLog("lctrl %x",keyboard_info->lctrl);
//                USBH_UsrLog("lshift %x",keyboard_info->lshift);
//                USBH_UsrLog("lalt %x",keyboard_info->lalt);
//                USBH_UsrLog("lgui %x",keyboard_info->lgui);
//                USBH_UsrLog("rctrl %x",keyboard_info->rctrl);
//                USBH_UsrLog("rshift %x",keyboard_info->rshift);
//                USBH_UsrLog("rgui %x",keyboard_info->rgui);
                
                USBH_UsrLog("keys[6] %x %x %x %x %x %x ",keyboard_info->keys[0],
                                                         keyboard_info->keys[1],
                                                         keyboard_info->keys[2],
                                                         keyboard_info->keys[3],
                                                         keyboard_info->keys[4],
                                                         keyboard_info->keys[5]);
                
                if(keyboard_info->keys[0] == 0x39)
                {
                    led_flag=~led_flag;
                    if(led_flag)
                    {
                        reportBuff[0] = 0X02;
                        status = USBH_HID_SetReport (phost,2,0,reportBuff,1);
                        USBH_UsrLog("USBH_HID_SetReport %02x  reportBuff %02x  ",status,reportBuff[0]); 
                    }
                    else
                    {
                        reportBuff[0] = 0X00;
                        status = USBH_HID_SetReport (phost,2,0,reportBuff,1);
                        USBH_UsrLog("USBH_HID_SetReport %02x  reportBuff %02x  ",status,reportBuff[0]); 

                    }

                }
                
            }
            



       }     
       break;
       
       case HID_MOUSE:
       {  
           HID_MOUSE_Info_TypeDef *mouse_info;
           
           mouse_info = USBH_HID_GetMouseInfo(phost);
           USBH_UsrLog("mouse_info X%d, Y%d ,button %d %d %d",mouse_info->x,mouse_info->y,mouse_info->buttons[2],mouse_info->buttons[1],mouse_info->buttons[0]);
       }
       break;
       
       default:
       break;
   }
}
/* USER CODE END 1 */

观察log，只有当USBH_HID_SetReport的返回值为  USBH_OK   = 0,时候我们才能看到灯的变化。

 那我们继续修改代码

/* USER CODE BEGIN 1 */
void USBH_HID_EventCallback(USBH_HandleTypeDef *phost)
{
    HID_TypeTypeDef   type = HID_UNKNOWN;

    USBH_ErrLog("USBH_HID_EventCallback");

    type = USBH_HID_GetDeviceType(phost);

    switch(type)
    {
    case HID_KEYBOARD:
    {
        HID_KEYBD_Info_TypeDef *keyboard_info;
        char ascii;
        uint8_t reportBuff[1];
        USBH_StatusTypeDef status         = USBH_BUSY;
        static uint8_t led_flag =0;

        keyboard_info = USBH_HID_GetKeybdInfo(phost);

        if( keyboard_info != NULL )
        {
            ascii = USBH_HID_GetASCIICode(keyboard_info);
            if( ascii != 0 )
            {
                USBH_UsrLog("%c",ascii);
            }

//                USBH_UsrLog("state %x",keyboard_info->state);
//                USBH_UsrLog("lctrl %x",keyboard_info->lctrl);
//                USBH_UsrLog("lshift %x",keyboard_info->lshift);
//                USBH_UsrLog("lalt %x",keyboard_info->lalt);
//                USBH_UsrLog("lgui %x",keyboard_info->lgui);
//                USBH_UsrLog("rctrl %x",keyboard_info->rctrl);
//                USBH_UsrLog("rshift %x",keyboard_info->rshift);
//                USBH_UsrLog("rgui %x",keyboard_info->rgui);

            USBH_UsrLog("keys[6] %x %x %x %x %x %x ",keyboard_info->keys[0],
                        keyboard_info->keys[1],
                        keyboard_info->keys[2],
                        keyboard_info->keys[3],
                        keyboard_info->keys[4],
                        keyboard_info->keys[5]);

            if(keyboard_info->keys[0] == 0x39)
            {
                led_flag=~led_flag;
                if(led_flag)
                {
                    reportBuff[0] = 0X02;
                    do
                    {
                        status = USBH_HID_SetReport (phost,2,0,reportBuff,1);
                    }
                    while(status !=USBH_OK);

                    USBH_UsrLog("USBH_HID_SetReport %02x  reportBuff %02x  ",status,reportBuff[0]);
                }
                else
                {
                    reportBuff[0] = 0X00;
                    do
                    {
                        status = USBH_HID_SetReport (phost,2,0,reportBuff,1);
                    }
                    while(status !=USBH_OK);
                    USBH_UsrLog("USBH_HID_SetReport %02x  reportBuff %02x  ",status,reportBuff[0]);

                }

            }

        }
    }
    break;

    case HID_MOUSE:
    {
        HID_MOUSE_Info_TypeDef *mouse_info;

        mouse_info = USBH_HID_GetMouseInfo(phost);
        USBH_UsrLog("mouse_info X%d, Y%d ,button %d %d %d",mouse_info->x,mouse_info->y,mouse_info->buttons[2],mouse_info->buttons[1],mouse_info->buttons[0]);
    }
    break;

    default:
        break;
    }
}
/* USER CODE END 1 */

好了我们继续测试发现我们按一下CAPS_LOCK后CAPS_LOCK指示灯能进行翻转。