我使用的是IAR5.4库里面自带的鼠标例程，可以成功运行，但是按照圈圈的那个说明修改成usb键盘却无法运行,我修改的步骤如下：
第一步：修改const u8 Joystick_DeviceDescriptor[JOYSTICK_SIZ_DEVICE_DESC] =
{
0x12, /*bLength */
USB_DEVICE_DESCRIPTOR_TYPE, /*bDescriptorType*/
0x00, /*bcdUSB */
0x02,
0x00, /*bDeviceClass*/
0x00, /*bDeviceSubClass*/
0x00, /*bDeviceProtocol*/
0x40, /*bMaxPacketSize40*/
0x34, /*idVendor (0x1234)*/
0x12,
0x21, /*idProduct = 0x4321*/
0x43,
0x00, /*bcdDevice rel. 2.00*/
0x02,
1, /*Index of string descriptor describing
manufacturer */
2, /*Index of string descriptor describing
product*/
3, /*Index of string descriptor describing the
device serial number */
0x01 /*bNumConfigurations*/
}
第二步我修改：
const u8 Joystick_ConfigDescriptor[JOYSTICK_SIZ_CONFIG_DESC] =
{
//以下为配置描述符
0x09, /* bLength: Configuation Descriptor size */
USB_CONFIGURATION_DESCRIPTOR_TYPE, /* bDescriptorType: Configuration */
JOYSTICK_SIZ_CONFIG_DESC,
/* wTotalLength: Bytes returned */
0x00,
0x01, /*bNumInterfaces: 1 interface*/
0x01, /*bConfigurationValue: Configuration value*/
0x00, /*iConfiguration: Index of string descriptor describing
the configuration*/
0xC0, /*bmAttributes: self powered */
0x32, /*MaxPower 100 mA: this current is used for detecting Vbus*/
//以下为接口描述符
/************** 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*/
0x01, /*bInterfaceProtocol : 0=none, 1=keyboard, 2=mouse*/
0, /*iInterface: Index of string descriptor*/
//以下为HID描述符
/******************** Descriptor of Joystick Mouse HID ********************/
/* 18 */
0x09, /*bLength: HID Descriptor size*/
HID_DESCRIPTOR_TYPE, /*bDescriptorType: HID*/
0x00, /*bcdHID: HID Class Spec release number*/
0x01,
0x00, /*bCountryCode: Hardware target country*/
0x01, /*bNumDescriptors: Number of HID class descriptors to follow*/
0x22, /*bDescriptorType*/
JOYSTICK_SIZ_REPORT_DESC,/*wItemLength: Total length of Report descriptor*/
0x00,
//以下为输入端点1描述符
/******************** Descriptor of Joystick Mouse endpoint ********************/
/* 27 */
0x07, /*bLength: Endpoint Descriptor size*/
USB_ENDPOINT_DESCRIPTOR_TYPE, /*bDescriptorType:*/
0x81, /*bEndpointAddress: Endpoint Address (IN)*/
0x03, /*bmAttributes: Interrupt endpoint*/
0x08, /*wMaxPacketSize: 8 Byte max */
0x00,
0x20, /*bInterval: Polling Interval (32 ms)*/
//以下为输出端点1描述符
/* 34 */
0x07, /*bLength: Endpoint Descriptor size*/
USB_ENDPOINT_DESCRIPTOR_TYPE, /*bDescriptorType:*/
0x01, /*bEndpointAddress: Endpoint Address (OUT)*/
0x03, /*bmAttributes: Interrupt endpoint*/
0x08, /*wMaxPacketSize: 8 Byte max */
0x00,
0x20, /*bInterval: Polling Interval (32 ms)*/
/* 41 */
}
; /* MOUSE_ConfigDescriptor */
const u8 Joystick_ReportDescriptor[JOYSTICK_SIZ_REPORT_DESC] =
{
0x05, 0x01, // USAGE_PAGE (Generic Desktop)
0x09, 0x06, // USAGE (Keyboard)
0xa1, 0x01, // COLLECTION (Application)
0x05, 0x07, // USAGE_PAGE (Keyboard/Keypad)
0x19, 0xe0, // USAGE_MINIMUM (Keyboard LeftControl)
0x29, 0xe7, // USAGE_MAXIMUM (Keyboard Right GUI)
0x15, 0x00, // LOGICAL_MINIMUM (0)
0x25, 0x01, // LOGICAL_MAXIMUM (1)
0x95, 0x08, // REPORT_COUNT (8)
0x75, 0x01, // REPORT_SIZE (1)
0x81, 0x02, // INPUT (Data,Var,Abs)
0x95, 0x01, // REPORT_COUNT (1)
0x75, 0x08, // REPORT_SIZE (8)
0x81, 0x03, // INPUT (Cnst,Var,Abs)
0x95, 0x06, // REPORT_COUNT (6)
0x75, 0x08, // REPORT_SIZE (8)
0x25, 0xFF, // LOGICAL_MAXIMUM (255)
0x19, 0x00, // USAGE_MINIMUM (Reserved (no event indicated))
0x29, 0x65, // USAGE_MAXIMUM (Keyboard Application)
0x81, 0x00, // INPUT (Data,Ary,Abs)
0x25, 0x01, // LOGICAL_MAXIMUM (1)
0x95, 0x02, // REPORT_COUNT (2)
0x75, 0x01, // REPORT_SIZE (1)
0x05, 0x08, // USAGE_PAGE (LEDs)
0x19, 0x01, // USAGE_MINIMUM (Num Lock)
0x29, 0x02, // USAGE_MAXIMUM (Caps Lock)
0x91, 0x02, // OUTPUT (Data,Var,Abs)
0x95, 0x01, // REPORT_COUNT (1)
0x75, 0x06, // REPORT_SIZE (6)
0x91, 0x03, // OUTPUT (Cnst,Var,Abs)
0xc0 // END_COLLECTION
}
第三步：修改
/* Update the serial number string descriptor with the data from the unique
ID*/
Get_SerialNum();
pInformation->Current_Configuration = 0;
/* Connect the device */
PowerOn();
/* USB interrupts initialization */
_SetISTR(0); /* clear pending interrupts */
wInterrupt_Mask = IMR_MSK;
_SetCNTR(wInterrupt_Mask); /* set interrupts mask */
bDeviceState = UNCONNECTED;
}
/*******************************************************************************
* Function Name : Joystick_Reset.
* Description : Joystick Mouse reset routine.
* Input : None.
* Output : None.
* Return : None.
*******************************************************************************/
void Joystick_Reset(void)
{
/* Set Joystick_DEVICE as not configured */
pInformation->Current_Configuration = 0;
pInformation->Current_Interface = 0;/*the default Interface*/
/* Current Feature initialization */
pInformation->Current_Feature = Joystick_ConfigDescriptor[7];
SetBTABLE(BTABLE_ADDRESS);
/* Initialize Endpoint 0 */
SetEPType(ENDP0, EP_CONTROL);
SetEPTxStatus(ENDP0, EP_TX_STALL);
SetEPRxAddr(ENDP0, ENDP0_RXADDR);
SetEPTxAddr(ENDP0, ENDP0_TXADDR);
Clear_Status_Out(ENDP0);
SetEPRxCount(ENDP0, Device_Property.MaxPacketSize);
SetEPRxValid(ENDP0);
/* Initialize Endpoint 1 */
SetEPType(ENDP1, EP_INTERRUPT);
SetEPTxAddr(ENDP1, ENDP1_TXADDR);
SetEPTxCount(ENDP1, 8);
SetEPRxStatus(ENDP1, EP_RX_DIS);
SetEPTxStatus(ENDP1, EP_TX_NAK);
bDeviceState = ATTACHED;
/* Set this device to response on default address */
SetDeviceAddress(0);
地址定义： #define ENDP1_TXADDR (0x98)
#define ENDP1_RXADDR (0xD8)
运行：目前是电脑无**常识别usb设备，
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