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usbcdc可以双向通信吗

树的种类 • 2023-5-25 • 软件运维 • 阅读 22

usbcdc可以双向通信吗,第1张

以下就是要改动的地方

1.将usbd_hid_core.c和usbd_hid_cdc_wrapper.c和他们的头文件加入进去，这两个文件可以在例程自带的USB库中找到

2.将__ALIGN_BEGIN uint8_t USBD_DeviceDesc[USB_SIZ_DEVICE_DESC]改为如下，这一步主要是修改设备描述符为复陪橘合设备

__ALIGN_BEGIN uint8_t USBD_DeviceDesc[USB_SIZ_DEVICE_DESC] __ALIGN_END =

{

0x12, /*bLength */

USB_DEVICE_DESCRIPTOR_TYPE, /*bDescriptorType*/

0x00, /*bcdUSB */

0x02,

0xEF, /*bDeviceClass*/

0x02, /*bDeviceSubClass*/

0x01, /*bDeviceProtocol*/

USB_OTG_MAX_EP0_SIZE, /*bMaxPacketSize*/

LOBYTE(USBD_VID), /*idVendor*/

HIBYTE(USBD_VID), /*idVendor*/

LOBYTE(USBD_PID), /*idVendor*/

HIBYTE(USBD_PID), /*idVendor*/

0x00, /*bcdDevice rel. 2.00*/

0x02,

USBD_IDX_MFC_STR, /*Index of manufacturer string*/

USBD_IDX_PRODUCT_STR, /*Index of product string*/

USBD_IDX_SERIAL_STR,/*Index of serial number string*/

USBD_CFG_MAX_NUM/*bNumConfigurations*/

} /* USB_DeviceDescriptor */

3.更改PID VID

#define USBD_VID0x0483

#define USBD_PID0xA105

3.在usbd_hid_core.c和.h中修改以下地方，主要是添加HID 输入端口和报文，例程的库中USBD_HID_CfgDesc是只有USB HID输入端口（HID_IN_EP）没有输出端口（HID_OUT_EP）的，同样例程中的HID_MOUSE_ReportDesc报文是让电脑按鼠族乱桐标的方式来处理USB数据的，现在改为传输64字节数据报文，然后就可以通过USB自定义协议来进行数据传输了兆坦。当然USB_HID_CONFIG_DESC_SIZ和HID_MOUSE_REPORT_DESC_SIZE两个数据长度也要修改

#define USB_HID_CONFIG_DESC_SIZ 41

#define USB_HID_DESC_SIZ 9

#define HID_MOUSE_REPORT_DESC_SIZE33

__ALIGN_BEGIN static uint8_t USBD_HID_CfgDesc[USB_HID_CONFIG_DESC_SIZ] __ALIGN_END =

{

0x09, /* bLength: Configuration Descriptor size */

USB_CONFIGURATION_DESCRIPTOR_TYPE, /* bDescriptorType: Configuration */

USB_HID_CONFIG_DESC_SIZ,

/* wTotalLength: Bytes returned */

0x00,

0x01, /*bNumInterfaces: 1 interface*/

0x01, /*bConfigurationValue: Configuration value*/

0x00, /*iConfiguration: Index of string descriptor describing

the configuration*/

0xE0, /*bmAttributes: bus powered and Support Remote Wake-up */

0x32, /*MaxPower 100 mA: this current is used for detecting Vbus*/

/************** Descriptor of Joystick Mouse interface ****************/

/* 09 */

0x09, /*bLength: Interface Descriptor size*/

USB_INTERFACE_DESCRIPTOR_TYPE,/*bDescriptorType: Interface descriptor type*/

0x00, /*bInterfaceNumber: Number of Interface*/

0x00, /*bAlternateSetting: Alternate setting*/

0x02, /*bNumEndpoints*/

0x03, /*bInterfaceClass: HID*/

0x01, /*bInterfaceSubClass : 1=BOOT, 0=no boot*/

0x02, /*nInterfaceProtocol : 0=none, 1=keyboard, 2=mouse*/

0,/*iInterface: Index of string descriptor*/

/******************** Descriptor of Joystick Mouse HID ********************/

/* 18 */

0x09, /*bLength: HID Descriptor size*/

HID_DESCRIPTOR_TYPE, /*bDescriptorType: HID*/

0x11, /*bcdHID: HID Class Spec release number*/

0x01,

0x00, /*bCountryCode: Hardware target country*/

0x01, /*bNumDescriptors: Number of HID class descriptors to follow*/

0x22, /*bDescriptorType*/

HID_MOUSE_REPORT_DESC_SIZE,/*wItemLength: Total length of Report descriptor*/

0x00,

/******************** Descriptor of Mouse endpoint ********************/

/* 27 */

0x07, /*bLength: Endpoint Descriptor size*/

USB_ENDPOINT_DESCRIPTOR_TYPE, /*bDescriptorType:*/

HID_IN_EP, /*bEndpointAddress: Endpoint Address (IN)*/

0x03, /*bmAttributes: Interrupt endpoint*/

HID_IN_PACKET, /*wMaxPacketSize: 4 Byte max */

0x00,

HID_FS_BINTERVAL, /*bInterval: Polling Interval (10 ms)*/

/* 34 */

0x07, /*bLength: Endpoint Descriptor size*/

USB_ENDPOINT_DESCRIPTOR_TYPE, /*bDescriptorType:*/

HID_OUT_EP, /*bEndpointAddress: Endpoint Address (IN)*/

0x03, /*bmAttributes: Interrupt endpoint*/

HID_OUT_PACKET, /*wMaxPacketSize: 4 Byte max */

0x00,

HID_FS_BINTERVAL, /*bInterval: Polling Interval (10 ms)*/

/* 41 */

}

__ALIGN_BEGIN static uint8_t HID_MOUSE_ReportDesc[HID_MOUSE_REPORT_DESC_SIZE] __ALIGN_END =

{

0x05, 0x8c, /* USAGE_PAGE (ST Page) */

0x09, 0x01, /* USAGE (Demo Kit) */

0xa1, 0x01, /* COLLECTION (Application) */

0x09,0x03, // USAGE ID - Vendor defined

0x15,0x00, // LOGICAL_MINIMUM (0)

0x26,0x00, 0xFF, // LOGICAL_MAXIMUM (255)

0x75,0x08, // REPORT_SIZE (8bit)

0x95,0x40, // REPORT_COUNT (64Byte)

0x81,0x02, // INPUT (Data,Var,Abs)

0x09,0x04, // USAGE ID - Vendor defined

0x15,0x00, // LOGICAL_MINIMUM (0)

0x26,0x00,0xFF, // LOGICAL_MAXIMUM (255)

0x75,0x08, // REPORT_SIZE (8bit)

0x95,0x40, // REPORT_COUNT (64Byte)

0x91,0x02, // OUTPUT (Data,Var,Abs)

0xc0 /* END_COLLECTION */

#endif

}

4.将对应的USB HID 输入端口初始化添加上去

uint8_t USBD_HID_Init (void *pdev,

uint8_t cfgidx)

{

/* Open EP IN */

DCD_EP_Open(pdev,

HID_IN_EP,

HID_IN_PACKET,

USB_OTG_EP_INT)

DCD_EP_Open(pdev,

HID_OUT_EP,

HID_OUT_PACKET,

USB_OTG_EP_INT)

#if 1

/* Prepare Out endpoint to receive next packet */

DCD_EP_PrepareRx(pdev,

HID_OUT_EP,

(uint8_t*)(USB_HID_Rx_Buffer),

HID_OUT_PACKET)

#endif

return USBD_OK

}

/**

* @brief USBD_HID_Init

* DeInitialize the HID layer

* @param pdev: device instance

* @param cfgidx: Configuration index

* @retval status

*/

uint8_t USBD_HID_DeInit (void *pdev,

uint8_t cfgidx)

{

/* Close HID EPs */

DCD_EP_Close (pdev , HID_IN_EP)

DCD_EP_Close (pdev , HID_OUT_EP)

return USBD_OK

}

5.在usbd_hid_cdc_wrapper.c的USBD_HID_CDC_CfgDesc中，同样的添加USB输入端口，而IAD和配置接口那些人家已经帮你添加好了，照着用就行

__ALIGN_BEGIN static uint8_t USBD_HID_CDC_CfgDesc[USB_HID_CDC_CONFIG_DESC_SIZ] __ALIGN_END =

{

0x09, /* bLength: Configuration Descriptor size */

USB_CONFIGURATION_DESCRIPTOR_TYPE, /* bDescriptorType: Configuration */

USB_HID_CDC_CONFIG_DESC_SIZ,

/* wTotalLength: Bytes returned */

0x00,

0x03, /*bNumInterfaces: 3 interfaces (2 for CDC, 1 for MSC)*/

0x01, /*bConfigurationValue: Configuration value*/

0x00, /*iConfiguration: Index of string descriptor describing

the configuration*/

0xE0, /*bmAttributes: bus powered and Support Remote Wake-up */

0x32, /*MaxPower 100 mA: this current is used for detecting Vbus*/

/************** Descriptor of Joystick Mouse interface ****************/

/* 09 */

0x09, /*bLength: Interface Descriptor size*/

USB_INTERFACE_DESCRIPTOR_TYPE,/*bDescriptorType: Interface descriptor type*/

HID_INTERFACE, /*bInterfaceNumber: Number of Interface*/

0x00, /*bAlternateSetting: Alternate setting*/

0x02, /*bNumEndpoints*/

0x03, /*bInterfaceClass: HID*/

0x01, /*bInterfaceSubClass : 1=BOOT, 0=no boot*/

0x02, /*nInterfaceProtocol : 0=none, 1=keyboard, 2=mouse*/

0,/*iInterface: Index of string descriptor*/

/******************** Descriptor of Joystick Mouse HID ********************/

/* 18 */

0x09, /*bLength: HID Descriptor size*/

HID_DESCRIPTOR_TYPE, /*bDescriptorType: HID*/

0x11, /*bcdHID: HID Class Spec release number*/

0x01,

0x00, /*bCountryCode: Hardware target country*/

0x01, /*bNumDescriptors: Number of HID class descriptors to follow*/

0x22, /*bDescriptorType*/

HID_MOUSE_REPORT_DESC_SIZE,/*wItemLength: Total length of Report descriptor*/

0x00,

/******************** Descriptor of Mouse endpoint ********************/

/* 27 */

0x07, /*bLength: Endpoint Descriptor size*/

USB_ENDPOINT_DESCRIPTOR_TYPE, /*bDescriptorType:*/

HID_IN_EP, /*bEndpointAddress: Endpoint Address (IN)*/

0x03, /*bmAttributes: Interrupt endpoint*/

HID_IN_PACKET, /*wMaxPacketSize: 4 Byte max */

0x00,

0x0A, /*bInterval: Polling Interval (10 ms)*/

/* 34 */

0x07, /*bLength: Endpoint Descriptor size*/

USB_ENDPOINT_DESCRIPTOR_TYPE, /*bDescriptorType:*/

HID_OUT_EP, /*bEndpointAddress: Endpoint Address (IN)*/

0x03, /*bmAttributes: Interrupt endpoint*/

HID_OUT_PACKET, /*wMaxPacketSize: 4 Byte max */

0x00,

HID_FS_BINTERVAL, /*bInterval: Polling Interval (10 ms)*/

/* 41 */

/******** /IAD should be positioned just before the CDC interfaces ******

IAD to associate the two CDC interfaces */

0x08, /* bLength */

0x0B, /* bDescriptorType */

0x01, /* bFirstInterface */

0x02, /* bInterfaceCount */

0x02, /* bFunctionClass */

0x02, /* bFunctionSubClass */

0x01, /* bFunctionProtocol */

0x00, /* iFunction (Index of string descriptor describing this function) */

/*Interface Descriptor */

0x09, /* bLength: Interface Descriptor size */

USB_INTERFACE_DESCRIPTOR_TYPE, /* bDescriptorType: Interface */

/* Interface descriptor type */

CDC_COM_INTERFACE, /* bInterfaceNumber: Number of Interface */

0x00, /* bAlternateSetting: Alternate setting */

0x01, /* bNumEndpoints: One endpoints used */

0x02, /* bInterfaceClass: Communication Interface Class */

0x02, /* bInterfaceSubClass: Abstract Control Model */

0x01, /* bInterfaceProtocol: Common AT commands */

0x01, /* iInterface: */

/*Header Functional Descriptor*/

0x05, /* bLength: Endpoint Descriptor size */

0x24, /* bDescriptorType: CS_INTERFACE */

0x00, /* bDescriptorSubtype: Header Func Desc */

0x10, /* bcdCDC: spec release number */

0x01,

/*Call Management Functional Descriptor*/

0x05, /* bFunctionLength */

0x24, /* bDescriptorType: CS_INTERFACE */

0x01, /* bDescriptorSubtype: Call Management Func Desc */

0x00, /* bmCapabilities: D0+D1 */

0x02, /* bDataInterface: 2 */

/*ACM Functional Descriptor*/

0x04, /* bFunctionLength */

0x24, /* bDescriptorType: CS_INTERFACE */

0x02, /* bDescriptorSubtype: Abstract Control Management desc */

0x02, /* bmCapabilities */

/*Union Functional Descriptor*/

0x05, /* bFunctionLength */

0x24, /* bDescriptorType: CS_INTERFACE */

0x06, /* bDescriptorSubtype: Union func desc */

0x01, /* bMasterInterface: Communication class interface */

0x02, /* bSlaveInterface0: Data Class Interface */

/*Endpoint 2 Descriptor*/

0x07, /* bLength: Endpoint Descriptor size */

USB_ENDPOINT_DESCRIPTOR_TYPE, /* bDescriptorType: Endpoint */

CDC_CMD_EP, /* bEndpointAddress */

0x03, /* bmAttributes: Interrupt */

LOBYTE(CDC_CMD_PACKET_SZE), /* wMaxPacketSize: */

HIBYTE(CDC_CMD_PACKET_SZE),

0xFF, /* bInterval: */

/*---------------------------------------------------------------------------*/

/*Data class interface descriptor*/

0x09, /* bLength: Endpoint Descriptor size */

USB_INTERFACE_DESCRIPTOR_TYPE, /* bDescriptorType: */

0x02, /* bInterfaceNumber: Number of Interface */

0x00, /* bAlternateSetting: Alternate setting */

0x02, /* bNumEndpoints: Two endpoints used */

0x0A, /* bInterfaceClass: CDC */

0x00, /* bInterfaceSubClass: */

0x00, /* bInterfaceProtocol: */

0x00, /* iInterface: */

/*Endpoint OUT Descriptor*/

0x07, /* bLength: Endpoint Descriptor size */

USB_ENDPOINT_DESCRIPTOR_TYPE, /* bDescriptorType: Endpoint */

CDC_OUT_EP,/* bEndpointAddress */

0x02, /* bmAttributes: Bulk */

LOBYTE(CDC_DATA_MAX_PACKET_SIZE), /* wMaxPacketSize: */

HIBYTE(CDC_DATA_MAX_PACKET_SIZE),

0x00, /* bInterval: ignore for Bulk transfer */

/*Endpoint IN Descriptor*/

0x07, /* bLength: Endpoint Descriptor size */

USB_ENDPOINT_DESCRIPTOR_TYPE, /* bDescriptorType: Endpoint */

CDC_IN_EP,/* bEndpointAddress */

0x02, /* bmAttributes: Bulk */

LOBYTE(CDC_DATA_MAX_PACKET_SIZE), /* wMaxPacketSize: */

HIBYTE(CDC_DATA_MAX_PACKET_SIZE),

0x00, /* bInterval */

}

6.在usbd_conf.h文件中修改输入输出端口和大小

#define HID_IN_EP 0x81

#define HID_IN_PACKET 0x40

#define HID_OUT_EP 0x01

#define HID_OUT_PACKET 0x40

#define CDC_IN_EP 0x83 /* EP1 for data IN */

#define CDC_OUT_EP 0x03 /* EP1 for data OUT */

#define CDC_CMD_EP 0x82 /* EP2 for CDC commands */

7.在usb_conf.h中修改缓冲区大小，这里不改端口3是发不出数据的

#ifdef USB_OTG_FS_CORE

#define RX_FIFO_FS_SIZE 64

#define TX0_FIFO_FS_SIZE 64

#define TX1_FIFO_FS_SIZE 64

#define TX2_FIFO_FS_SIZE 64

#define TX3_FIFO_FS_SIZE 64

7.在main中while循环中添加一下测试代码

uint8_t test_buf[64]={2,2,3,4,5,6,2,4,5}

while(1)

{

if(usbstatus!=bDeviceState)

{

usbstatus=bDeviceState

if(usbstatus==1)

{

POINT_COLOR=BLUE

//LCD_ShowString(30,130,200,16,16,"USB Connected")

LED1=0//DS1ÁÁ

}else

{

POINT_COLOR=RED

//LCD_ShowString(30,130,200,16,16,"USB disConnected ")

LED1=1//DS1Ãð

}

}

if(USB_USART_RX_STA&0x8000)

{

VCP_DataRx(USB_USART_RX_BUF,64)

len=USB_USART_RX_STA&0x3FFF

//USBD_HID_SendReport(&USB_OTG_dev,test_buf,64)

for(t=0t<lent++)

{

VCP_DataTx(USB_USART_RX_BUF[t])

}

usb_printf("\r\n\r\n")

USB_USART_RX_STA=0

}else

{

times++

if(times%5000==0)

{

}

if(times%200==0)

{

delay_ms(20)

USBD_HID_SendReport(&USB_OTG_dev,test_buf,64)

delay_ms(20)

}

if(times%30==0)LED0=!LED0

delay_ms(10)

}

这样就改好了，编译下载下去就可以在电脑端看到你的CDC和HID设备了

这是USB抓包和串口测试

代码可自行下载

https://download.csdn.net/download/C_linux_233/85165930

USB HID 是Human Interface Device的缩写，由其名称可以了解HID设备是直接与人交互塌局的设备，例如键盘、鼠标与游戏杆等。不过HID设备并不如族一定要有人机接口，只要符合HID类别规范的设备都是HID设团橡让备。 下列是HID类别设备的主要能力

欢迎分享，转载请注明来源：内存溢出

原文地址: http://outofmemory.cn/yw/12505303.html

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