最近移植了一下 STM32F103 MutiDevice的功能 实现一个 SD读卡器 和 CDC串口同时实现的功能
其实整个过程是融合2部分的代码
USB程序的架构是这样的
HW层 -》 USBEndPoint组 -》 回调函数
HW层两部分的代码完全一样不需要关心
主要过程是配置Endpoint 和 USB 相关的回调函数
USBEndPoint 一共有可配置的 EP 0-7 8个端点
其中EP0 用于传输枚举 及其它控制信息不可以动
其他端点EP 均可以自由配置
CDC 和 Mass占用端点如下
| CDC | Mass Storage | |
| ENDP0 TX/RX |
枚举和控制 | 枚举和控制 |
| ENDP1 TX |
CDC 串口输入 |
Mass数据输入 |
| ENDP2 TX |
CDC 中断输入 |
未使用 |
| ENDP2 RX |
未使用 | Mass数据输出 |
| ENDP3 RX |
CDC 串口输出 |
未使用 |
。。。。这个表格真不好用
现在重新分配如下
EP0 ： 不动
EP1TX：不动 串口输入
EP2TX：不动 CDC中断
EP3RX：不动 串口输出
EP4TX：Mass 数据输入
EP5RX：Mass 数据输出
/* USB Standard Device Descriptor */
const u8 Composite_DeviceDescriptor[] =
{
0x12, /* bLength */
USB_DEVICE_DESCRIPTOR_TYPE, /* bDescriptorType */
0x00,
0x02, /* bcdUSB = 2.00 */
0x00,//0xEF,//0x02, /* bDeviceClass: CDC */
0x00,//0X02,//0x00, /* bDeviceSubClass */
0x00,//0X01,//0x00, /* bDeviceProtocol */
0x40, /* bMaxPacketSize0 */
0x83,
0x04, /* idVendor = 0x0483 */
0x41,
0xaa, /* idProduct = 0x7540 */
0x00,
0x02, /* bcdDevice = 2.00 */
1, /* Index of string descriptor describing manufacturer */
2, /* Index of string descriptor describing product */
3, /* Index of string descriptor describing the device's serial number */
0x01 /* bNumConfigurations */
}; 主要修改USB子类 修改为 EF 02 01 或者 00 00 00 似乎都可以
#define WBVAL(x) (x & 0xFF),((x >> 8) & 0xFF)
// Interface numbers
enum {
USB_CDC_CIF_NUM0,
USB_CDC_DIF_NUM0,
USB_MAS_CIF_NUM0,
// USB_MAS_DIF_NUM2,
USB_NUM_INTERFACES // number of interfaces
};
#define USB_CONFIGUARTION_DESC_SIZE 9
#define USB_IAD_DESC_SIZE 8
#define USB_INTERFACE_DESC_SIZE 9
#define USB_ENDPOINT_DESC_SIZE 7
#define CDC_COMMUNICATION_INTERFACE_CLASS 0x02
#define CDC_COMMUNICATION_INTERFACE_SUBCLASS 0x00
#define CDC_COMMUNICATION_INTERFACE_PROTOCOL 0x00
#define CDC_DATA_INTERFACE_CLASS 0x0A
#define CDC_CS_INTERFACE 0x24
#define CDC_HEADER 0x00
#define CDC_CALL_MANAGEMENT 0x01
#define CDC_ABSTRACT_CONTROL_MANAGEMENT 0x02
#define CDC_UNION 0x06
#define USB_ENDPOINT_TYPE_BULK 0x02
#define USB_ENDPOINT_TYPE_INTERRUPT 0x03
const u8 Composite_ConfigDescriptor[] =
{
/Configuation Descriptor/
USB_CONFIGUARTION_DESC_SIZE, /* bLength: Configuation Descriptor size /
USB_CONFIGURATION_DESCRIPTOR_TYPE, / bDescriptorType: Configuration /
//Composite_SIZ_CONFIG_DESC, / wTotalLength:no of returned bytes /
//0x00,
WBVAL( / wTotalLength /
Composite_SIZ_CONFIG_DESC
),
USB_NUM_INTERFACES, / bNumInterfaces: 2 interface /
0x01, / bConfigurationValue: Configuration value /
0x00, / iConfiguration: Index of string descriptor describing the configuration /
0xC0, / bmAttributes: self powered /
0x32, / MaxPower 0 mA */
USB_IAD_DESC_SIZE,
USB_IAD_DESCRIPTOR_TYPE,
USB_CDC_CIF_NUM0, /* bFirstInterface */
0x02, /* bInterfaceCount */
CDC_COMMUNICATION_INTERFACE_CLASS, /* bFunctionClass */
CDC_COMMUNICATION_INTERFACE_SUBCLASS, /* bFunctionSubClass */
CDC_COMMUNICATION_INTERFACE_PROTOCOL, /* bFunctionProcotol */
0x00, /* iInterface */
// //CDC
/Interface Descriptor/
USB_INTERFACE_DESC_SIZE, /* bLength: Interface Descriptor size /
USB_INTERFACE_DESCRIPTOR_TYPE, / bDescriptorType: Interface /
/ Interface descriptor type /
USB_CDC_CIF_NUM0, / 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 /
0x00, / 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 Managment Functional Descriptor/
0x05, / bFunctionLength /
0x24, / bDescriptorType: CS_INTERFACE /
0x01, / bDescriptorSubtype: Call Management Func Desc /
0x00, / bmCapabilities: D0+D1 /
USB_CDC_DIF_NUM0, / bDataInterface: 1 /
/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 /
USB_CDC_CIF_NUM0, / bMasterInterface: Communication class interface /
USB_CDC_DIF_NUM0, / bSlaveInterface0: Data Class Interface /
/Endpoint 2 Descriptor/
USB_ENDPOINT_DESC_SIZE, / bLength: Endpoint Descriptor size /
USB_ENDPOINT_DESCRIPTOR_TYPE, / bDescriptorType: Endpoint /
0x82, / bEndpointAddress: (IN2) /
USB_ENDPOINT_TYPE_INTERRUPT, / bmAttributes: Interrupt /
WBVAL(Composite_INT_SIZE), / wMaxPacketSize: /
0xFF, / bInterval: /
/Data class interface descriptor/
USB_INTERFACE_DESC_SIZE, / bLength: Endpoint Descriptor size /
USB_INTERFACE_DESCRIPTOR_TYPE, / bDescriptorType: /
USB_CDC_DIF_NUM0, / bInterfaceNumber: Number of Interface /
0x00, / bAlternateSetting: Alternate setting /
0x02, / bNumEndpoints: Two endpoints used /
CDC_DATA_INTERFACE_CLASS, / bInterfaceClass: CDC /
0x00, / bInterfaceSubClass: /
0x00, / bInterfaceProtocol: /
0x00, / iInterface: /
/Endpoint 3 Descriptor/
USB_ENDPOINT_DESC_SIZE, / bLength: Endpoint Descriptor size /
USB_ENDPOINT_DESCRIPTOR_TYPE, / bDescriptorType: Endpoint /
0x03, / bEndpointAddress: (OUT3) /
USB_ENDPOINT_TYPE_BULK, / bmAttributes: Bulk /
WBVAL(Composite_DATA_SIZE), / wMaxPacketSize: /
0x00, / bInterval: ignore for Bulk transfer /
/Endpoint 1 Descriptor/
USB_ENDPOINT_DESC_SIZE, / bLength: Endpoint Descriptor size /
USB_ENDPOINT_DESCRIPTOR_TYPE, / bDescriptorType: Endpoint /
0x81, / bEndpointAddress: (IN1) /
USB_ENDPOINT_TYPE_BULK, / bmAttributes: Bulk /
WBVAL(Composite_DATA_SIZE), / wMaxPacketSize: /
0x00, / bInterval /
/******************* Descriptor of Mass Storage interface ***************/
/ 09 /
0x09, / bLength: Interface Descriptor size /
0x04, / bDescriptorType: /
/ Interface descriptor type /
USB_MAS_CIF_NUM0, / bInterfaceNumber: Number of Interface /
0x00, / bAlternateSetting: Alternate setting /
0x02, / bNumEndpoints/
0x08, / bInterfaceClass: MASS STORAGE Class /
0x06, / bInterfaceSubClass : SCSI transparent/
0x50, / nInterfaceProtocol /
1, / iInterface: /
/ 18 */
0x07, /Endpoint descriptor length = 7/
0x05, /*Endpoint descriptor type */
0x84,//0x82, /*Endpoint address (IN, address 2) */
0x02, /*Bulk endpoint type */
0x40, /*Maximum packet size (64 bytes) */
0x00,
0x00, /*Polling interval in milliseconds /
/ 25 */
0x07, /*Endpoint descriptor length = 7 */
0x05, /*Endpoint descriptor type */
0x05,//0x02, /*Endpoint address (OUT, address 2) */
0x02, /*Bulk endpoint type */
0x40, /*Maximum packet size (64 bytes) */
0x00,
0x00 /Polling interval in milliseconds/
/32/
};
CDC 实现最好添加一个 IAD 的头 不过测试似乎不加也没关系
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