接下来将是两个例子：USB RamDisk（一个使用MCU内RAM的U盘）和USH HID（模拟鼠标），供懒得看/看不懂手册的童鞋了解相关过程
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JavaScript/**
* @brief USB_OTG_BSP_Init
* Initializes BSP configurations
* @param None
* @retval None
*/
void USB_OTG_BSP_Init(void)
{
}
/**
* @brief USB_OTG_BSP_EnableInterrupt
* Enable USB Global interrupt
* @param None
* @retval None
*/
void USB_OTG_BSP_EnableInterrupt(void)
{
}首先是void USB_OTG_BSP_Init(void)，在这里需要：
OtherGPIO_InitTypeDef GPIO_InitStructure;
RCC_AHB1PeriphClockCmd( RCC_AHB1Periph_GPIOA , ENABLE);
/* Configure SOF VBUS ID DM DP Pins */
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_8 |
GPIO_Pin_9 |
GPIO_Pin_11 |
GPIO_Pin_12;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_100MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL ;
GPIO_Init(GPIOA, &GPIO_InitStructure);
GPIO_PinAFConfig(GPIOA,GPIO_PinSource8,GPIO_AF_OTG1_FS) ;
GPIO_PinAFConfig(GPIOA,GPIO_PinSource9,GPIO_AF_OTG1_FS) ;
GPIO_PinAFConfig(GPIOA,GPIO_PinSource11,GPIO_AF_OTG1_FS) ;
GPIO_PinAFConfig(GPIOA,GPIO_PinSource12,GPIO_AF_OTG1_FS) ;
/* this for ID line debug */
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10;
GPIO_InitStructure.GPIO_OType = GPIO_OType_OD;
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP ;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_100MHz;
GPIO_Init(GPIOA, &GPIO_InitStructure);
GPIO_PinAFConfig(GPIOA,GPIO_PinSource10,GPIO_AF_OTG1_FS) ;2.之后打开时钟
OtherRCC_APB2PeriphClockCmd(RCC_APB2Periph_SYSCFG, ENABLE);
RCC_AHB2PeriphClockCmd(RCC_AHB2Periph_OTG_FS, ENABLE) ;之后是void USB_OTG_BSP_EnableInterrupt(void)，在这里配置USB相关的中断
OtherNVIC_InitTypeDef NVIC_InitStructure;
NVIC_PriorityGroupConfig(NVIC_PriorityGroup_1);
NVIC_InitStructure.NVIC_IRQChannel = OTG_FS_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 3;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);usb_conf.h
C++#ifdef USB_OTG_FS_CORE
#define RX_FIFO_FS_SIZE 128
#define TX0_FIFO_FS_SIZE 64
#define TX1_FIFO_FS_SIZE 128
#define TX2_FIFO_FS_SIZE 0
#define TX3_FIFO_FS_SIZE 0
#define TXH_NP_HS_FIFOSIZ 96
#define TXH_P_HS_FIFOSIZ 96
// #define USB_OTG_FS_LOW_PWR_MGMT_SUPPORT
// #define USB_OTG_FS_SOF_OUTPUT_ENABLED
#endif
C++#define USBD_CFG_MAX_NUM 1
#define USB_MAX_STR_DESC_SIZ 64
/**** USB_MSC_Class_Layer_Parameter *********/
#define MSC_IN_EP 0x81
#define MSC_OUT_EP 0x01
#define MSC_MAX_PACKET 512
#define MSC_MEDIA_PACKET 4096
/**** USB_HID Class_Layer_Parameter *********/
#define HID_IN_EP 0x81
#define HID_OUT_EP 0x01
#define HID_IN_PACKET 4
#define HID_OUT_PACKE 42.usbd_desc.cC++typedef struct _Device_TypeDef
{
uint8_t *(*GetDeviceDescriptor)( uint8_t speed ,
uint16_t *length);
uint8_t *(*GetLangIDStrDescriptor)( uint8_t speed ,
uint16_t *length);
uint8_t *(*GetManufacturerStrDescriptor)( uint8_t speed ,
uint16_t *length);
uint8_t *(*GetProductStrDescriptor)( uint8_t speed ,
uint16_t *length);
uint8_t *(*GetSerialStrDescriptor)( uint8_t speed ,
uint16_t *length);
uint8_t *(*GetConfigurationStrDescriptor)( uint8_t speed ,
uint16_t *length);
uint8_t *(*GetInterfaceStrDescriptor)( uint8_t speed ,
uint16_t *length);
#ifdef USB_SUPPORT_USER_STRING_DESC
uint8_t* (*Get_USRStringDesc) (uint8_t speed, uint8_t idx ,
uint16_t *length);
#endif /* USB_SUPPORT_USER_STRING_DESC */
} USBD_DEVICE, *pUSBD_DEVICE;这些回调的具体定义请参考手册6.6章 USB device user interface
Other__ALIGN_BEGIN uint8_t USBD_DeviceDesc[USB_SIZ_DEVICE_DESC] __ALIGN_END =
{
0x12, /*bLength */
USB_DEVICE_DESCRIPTOR_TYPE, /*bDescriptorType*/
0x00, /*bcdUSB */
0x02,
0x00, /*bDeviceClass*/
0x00, /*bDeviceSubClass*/
0x00, /*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 */并把其中涉及的设备信息定位成了宏
C++#define USBD_VID 0x0483
#define USBD_PID 0x5720
#define USBD_LANGID_STRING 0x409
#define USBD_MANUFACTURER_STRING "STMicroelectronics"
#define USBD_PRODUCT_HS_STRING "Mass Storage in HS Mode"
#define USBD_PRODUCT_FS_STRING "Mass Storage in FS Mode"
#define USBD_CONFIGURATION_HS_STRING "MSC Config"
#define USBD_INTERFACE_HS_STRING "MSC Interface"
#define USBD_CONFIGURATION_FS_STRING "MSC Config"
#define USBD_INTERFACE_FS_STRING "MSC Interface"
Othervoid USBD_Init(USB_OTG_CORE_HANDLE *pdev,
USB_OTG_CORE_ID_TypeDef coreID,
USBD_DEVICE *pDevice,
USBD_Class_cb_TypeDef *class_cb,
USBD_Usr_cb_TypeDef *usr_cb);[修改于 9年3个月前 - 2016/04/05 12:05:51]
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