前两天已经陆续分享了两篇帖子来介绍鼠标HID例程，今天再接再励继续扫尾工作。闲话少叙，马上开整。 TestApp_Init（） 在TestApp_Init（）函数内，通过Emulate_Mouse_WithButton() 函数来模拟鼠标各式功能：左击、右击，上移、下移，左移、右移，而其中的USB_Class_HID_Send_Data（）函数用于实现中断端点与Host PC进行数据通信。 - *****************************************************************************
- * Application task function. It is called from the main loop
- *****************************************************************************/
- void TestApp_Task(void)
- {
- /* call the periodic task function */
- USB_Class_HID_Periodic_Task();
- if(mouse_init) /*check whether enumeration is
- complete or not */
- {
- /* run the button emulation code */
- Emulate_Mouse_WithButton();
- }
- }
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Emulate_Mouse_WithButton（） 在本例程中，通过连接PTA4脚的SW3按键来模拟鼠标的右键，当然像鼠标的左击、上移、下移，左移、右移功能，也可通过SW3按键进行操作，而实现以上功能的关键就是：需要网友朋友们在理解鼠标报表描述符的基础上修改数据，并将其传递给中断端点。对报表描述符的介绍就不在本文展开啊，不了解的网友可以去参考先前分享的《USBHID设备应用（进阶篇）》一文。 - *****************************************************************************
- * This function sends the mouse data depending on which key was pressed on
- * the board
- *****************************************************************************/
- static void Emulate_Mouse_WithButton(void)
- {
- if(kbi_stat > 0)
- {
- switch(kbi_stat & KBI_STAT_MASK)
- {
- case LEFT_CLICK : /* PTG0 (left click) is pressed */
- rpt_buf[0] = LEFT_CLICK;
- rpt_buf[1] = 0x00;
- rpt_buf[2] = 0x00;
- break;
- case RIGHT_CLICK : /* PTG1 (right click) is pressed */
- rpt_buf[0] = RIGHT_CLICK;
- rpt_buf[1] = 0x00;
- rpt_buf[2] = 0x00;
- break;
- case MOVE_LEFT_RIGHT : /* PTG2 (left
- or right movement--depends on
- UP_LEFT macro) is pressed*/
- rpt_buf[1] = SHIFT_VAL;
- rpt_buf[0] = 0x00;
- rpt_buf[2] = 0x00;
- break;
- case MOVE_UP_DOWN : /* PTG3 (up or down
- movement--depends on
- UP_LEFT macro) is pressed*/
- rpt_buf[2] = SHIFT_VAL;
- rpt_buf[1] = 0x00;
- rpt_buf[0] = 0x00;
- break;
- default:break; /* otherwise */
- }
- kbi_stat = 0x00; /* reset status after servicing interrupt*/
- (void)USB_Class_HID_Send_Data(CONTROLLER_ID,HID_ENDPOINT,rpt_buf,
- MOUSE_BUFF_SIZE);
- if(rpt_buf[0])
- {
- /* required to send Click Release for Click Press Events */
- (void)USB_Class_HID_Send_Data(CONTROLLER_ID,HID_ENDPOINT,null_buf,
- MOUSE_BUFF_SIZE);
- }
- }
- return;
- }
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IRQ_ISR_PORTA（） SW3按键在按下松开后吗，触发此中断函数，修改kbi_stat值，来模拟鼠标右击功能。 - void IRQ_ISR_PORTA(void)
- {
- #if defined(MCU_MK20D5)
- NVICICPR1 = 1 << ((40)%32);
- NVICISER1 = 1 << ((40)%32);
- #elif defined (MCU_MKL25Z4)
- NVIC_ICPR = 1 << 30;
- NVIC_ISER = 1 << 30;
- #else
- NVICICPR2 = 1 << ((87)%32);
- NVICISER2 = 1 << ((87)%32);
- #endif
- DisableInterrupts;
- #if defined MCU_MKL25Z4
- if(PORTA_ISFR & (1<<4))
- {
- kbi_stat |= 0x02; /* Update the kbi state */
- PORTA_ISFR = (1 << 4); /* Clear the bit by writing a 1 to it */
- }
- #else
- if(PORTA_ISFR & (1<<19))
- {
- kbi_stat |= 0x02; /* Update the kbi state */
- PORTA_ISFR = (1 << 19); /* Clear the bit by writing a 1 to it */
- }
- #endif
- EnableInterrupts;
- }
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USB_Class_HID_Send_Data（） USB_Class_HID_Send_Data（）实现将报告描述符定义的4个字节的报告数据返回给HOST PC。 - ******************************************************************************
- * This function is used by Application to send data through HID class
- *****************************************************************************/
- uint_8 USB_Class_HID_Send_Data (
- uint_8 controller_ID, /* [IN] Controller ID */
- uint_8 ep_num, /* [IN] Endpoint Number */
- uint_8_ptr app_buff, /* [IN] Buffer to Send */
- USB_PACKET_SIZE size /* [IN] Length of the Transfer */
- )
- {
- uint_8 index;
- //volatile uint_8 producer, consumer;
- uint_8 producer, consumer;
- uint_8 status = USB_OK;
- USB_ENDPOINTS *ep_desc_data = (USB_ENDPOINTS *)
- USB_Desc_Get_Endpoints(controller_ID);
- DisableInterrupts;
- /* map the endpoint num to the index of the endpoint structure */
- index = USB_Map_Ep_To_Struct_Index(controller_ID, ep_num);
- producer = g_hid_endpoint_data.ep[index].bin_producer;
- consumer = g_hid_endpoint_data.ep[index].bin_consumer;
- if((uint_8)(producer - consumer) != (uint_8)(MAX_QUEUE_ELEMS))
- {
- /* the bin is not full*/
- uint_8 queue_num = (uint_8)(producer % MAX_QUEUE_ELEMS);
- /* queue the send request */
- /* put all send request parameters in the endpoint data structure */
- g_hid_endpoint_data.ep[index].queue[queue_num].controller_ID =
- controller_ID;
- g_hid_endpoint_data.ep[index].queue[queue_num].channel = ep_num;
- g_hid_endpoint_data.ep[index].queue[queue_num].app_buff = app_buff;
- g_hid_endpoint_data.ep[index].queue[queue_num].size = size;
- /* increment producer bin by 1*/
- g_hid_endpoint_data.ep[index].bin_producer++;
- producer++;
- if((uint_8)(producer - consumer) == (uint_8)1)
- {
- /* send the IO if there is only one element in the queue */
- status = USB_Class_Send_Data(controller_ID, ep_num, app_buff,size);
- }
- }
- else /* bin is full */
- {
- status = USBERR_DEVICE_BUSY;
- }
- EnableInterrupts;
- return status;
- }
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3. 例程调试 运行平台 1. TWR-KL25Z48M 2.CW10.6 运行例程（CW） 1) 使用USB cable连接TWR-KL25Z48M开发板Min-B USB连接器（J23）; 2) 加载工程后，点击 进行编译； 3) 编译成功后，点击 进入调试界面； 4) 进入调试界面后，使用USB cable连接-KL25Z48M开发板micro USB连接器（J13），接着点击 运行例程。
平台搭建
图 1 TWRKL25Z48M开发板 USB分析仪监测 · 枚举过程数据包分析 枚举过程的数据包分析，已在《USBHID设备应用（进阶篇）》中进行过详细介绍，在此就不重复介绍了，大家可以到论坛去下载《USB HID设备应用（进阶篇）》文档。 · 报告数据分析
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