設(shè)備描述符
倉庫地址
倉庫地址
USB 鼠標(biāo)閱讀順序
- 枚舉過程
- USB鼠標(biāo)實現(xiàn)——設(shè)備描述符（一）
- USB鼠標(biāo)實現(xiàn)——設(shè)置地址（二）
- USB鼠標(biāo)實現(xiàn)——配置描述符集合（三）
- USB鼠標(biāo)實現(xiàn)——字符串描述符（四）
- USB鼠標(biāo)實現(xiàn)——設(shè)備限定描述符（五）
- USB鼠標(biāo)實現(xiàn)——設(shè)置配置和獲取配置（六）
- USB鼠標(biāo)實現(xiàn)——報告描述符（七）
- USB鼠標(biāo)實現(xiàn)——HID 報告的返回（八）
獲取設(shè)備描述符請求
標(biāo)準(zhǔn)設(shè)備請求
typedef struct __attribute__ ((packed)){
union {
struct __attribute__ ((packed)) {
uint8_t recipient : 5; ///< Recipient type usb_request_recipient_t.
uint8_t type : 2; ///< Request type usb_request_type_t.
uint8_t direction : 1; ///< Direction type. usb_dir_t
} bmRequestType_bit;
uint8_t bmRequestType;
};
uint8_t bRequest;
uint16_t wValue;
uint16_t wIndex;
uint16_t wLength;
} usb_control_request_t;
USB 控制端點收到的數(shù)據(jù)
0x80 0x6 0x0 0x1 0x0 0x0 0x40 0x0
- bmRequestType：0x80
- 數(shù)據(jù)傳輸方向為 1，device-to-host
- 標(biāo)準(zhǔn)請求
- 請求的接收者為設(shè)備
- bRequest：0x06
- GET_DESCRIPTOR 獲取描述符請求
- wValue：0x0001（LSB）
- 低位：0x01 設(shè)備描述符
- 高位：0x00 索引號
- wIndex：0x0000（LSB）
- 低位：0x00
- 高位：0x00
- wLength：0x40
- 低位：0x40 請求返回的字節(jié)數(shù)為 0x40，設(shè)備實際返回的字節(jié)數(shù)可以比該域指定的字節(jié)數(shù)少
- 高位：0x00
設(shè)備描述符返回
設(shè)備描述符定義
設(shè)備描述符實現(xiàn)
usb_desc_device_t const desc_device =
{
.bLength = sizeof(usb_desc_device_t),
.bDescriptorType = USB_DESC_DEVICE,
.bcdUSB = 0x0200,
.bDeviceClass = 0x00,
.bDeviceSubClass = 0x00,
.bDeviceProtocol = 0x00,
.bMaxPacketSize0 = 0x40,
.idVendor = 0xCafe,
.idProduct = USB_PID,
.bcdDevice = 0x0100,
.iManufacturer = 0x01,
.iProduct = 0x02,
.iSerialNumber = 0x03,
.bNumConfigurations = 0x01
};
設(shè)備描述符數(shù)據(jù)
0x12 0x1 0x0 0x2 0x0 0x0 0x0 0x40 0xfe 0xca 0x8 0x40 0x0 0x1 0x1 0x2 0x3 0x1
設(shè)備描述符分析
-
bLength：0x12
- 表示該描述符的長度。設(shè)備描述符的長度為 18 字節(jié)，寫成十六進制就是 0x12。
-
bDescriptorType：0x01
- 描述符類型。設(shè)備描述符的編號為 0x01。
-
bcdUSB：0x0200
- 2 字節(jié)，該設(shè)備所使用的 USB 協(xié)議的版本。USB2.0 就是 0x0200，USB1.1 就是 0x0110。實際傳輸?shù)臅r候是低字節(jié)在前的。
-
bDeviceClass：0x00
- 是設(shè)備所使用的類代碼，不在設(shè)備描述符中定義設(shè)備類，而在接口描述符中定義設(shè)備類，所以該字段的值設(shè)置為 0。
-
bDeviceSubClass：0x00
- 是設(shè)備所使用子類代碼，bDeviceClass字段為0時，該字段也為0。
-
bDeviceProtocol：0x00
- 是設(shè)備所使用的協(xié)議，協(xié)議代碼由 USB 協(xié)會規(guī)定。
-
bMaxPacketSize0：0x40
- 端點 0 的最大包長。它的取值可以是 8 16 32 64，這里設(shè)置為 64。
-
idVender：0xCafe
- 2 字節(jié)，廠商 ID
-
idProduct：0x4008
- 2 字節(jié)，產(chǎn)品 ID
-
bcdDevice：0x0100
- 2 字節(jié)，設(shè)備的版本號
-
iManufacturer：0x01
- 描述廠商的字符串的索引值，獲取字符串描述符時，對應(yīng)的索引需要返回相應(yīng)的描述符。
-
iProduct：0x02
- 描述產(chǎn)品的字符串索引值，獲取字符串描述符時，對應(yīng)的索引需要返回相應(yīng)的描述符。
-
iSerialNumber：0x03
- 設(shè)備的序列號字符串索引值，獲取字符串描述符時，對應(yīng)的索引需要返回相應(yīng)的描述符。
-
bNumberConfigurations：0x01文章來源：http://www.zghlxwxcb.cn/news/detail-489128.html
- 表示該設(shè)備有多少種配置，當(dāng)前只用了一種配置
附 STM32 枚舉日志
HID 鼠標(biāo)枚舉過程分析文章來源地址http://www.zghlxwxcb.cn/news/detail-489128.html
suspend int
bus reset int
enum done int
rxflvl int
setup packed recvd
setup packed done
output ep int
h->d: 0x80 0x6 0x0 0x1 0x0 0x0 0x40 0x0
dcd xfer
input ep int
d->h :0x12 0x1 0x0 0x2 0x0 0x0 0x0 0x40 0xfe 0xca 0x8 0x40 0x0 0x1 0x1 0x2 0x3 0x1
turn off txfe
input ep int
edpt int send xfer complete event
dcd xfer
rxflvl int
bus reset int
output ep int
send xfer complete event
enum done int
rxflvl int
setup packed recvd
setup packed done
output ep int
h->d: 0x0 0x5 0x4 0x0 0x0 0x0 0x0 0x0
dcd xfer
input ep int
edpt int send xfer complete event
rxflvl int
setup packed recvd
setup packed done
output ep int
h->d: 0x80 0x6 0x0 0x1 0x0 0x0 0x12 0x0
dcd xfer
input ep int
d->h :0x12 0x1 0x0 0x2 0x0 0x0 0x0 0x40 0xfe 0xca 0x8 0x40 0x0 0x1 0x1 0x2 0x3 0x1
turn off txfe
input ep int
edpt int send xfer complete event
dcd xfer
rxflvl int
output ep int
send xfer complete event
rxflvl int
setup packed recvd
setup packed done
output ep int
h->d: 0x80 0x6 0x0 0x2 0x0 0x0 0xff 0x0
dcd xfer
input ep int
d->h :0x9 0x2 0x22 0x0 0x1 0x1 0x0 0xa0 0x32 0x9 0x4 0x0 0x0 0x1 0x3 0x1 0x2 0x0 0x9 0x21 0x11 0x1 0x0 0x1 0x22 0x4d 0x0 0x7 0x5 0x81 0x3 0x8 0x0 0xa
turn off txfe
input ep int
edpt int send xfer complete event
dcd xfer
rxflvl int
setup packed recvd
setup packed done
output ep int
h->d: 0x80 0x6 0x3 0x3 0x9 0x4 0xff 0x0
send xfer complete event
dcd xfer
input ep int
d->h :0xe 0x3 0x31 0x0 0x32 0x0 0x33 0x0 0x34 0x0 0x35 0x0 0x36 0x0
turn off txfe
input ep int
edpt int send xfer complete event
dcd xfer
rxflvl int
setup packed recvd
setup packed done
output ep int
h->d: 0x80 0x6 0x0 0x3 0x0 0x0 0xff 0x0
send xfer complete event
dcd xfer
input ep int
d->h :0x4 0x3 0x9 0x4
turn off txfe
input ep int
edpt int send xfer complete event
dcd xfer
rxflvl int
setup packed recvd
setup packed done
output ep int
h->d: 0x80 0x6 0x2 0x3 0x9 0x4 0xff 0x0
send xfer complete event
dcd xfer
input ep int
d->h :0x1e 0x3 0x54 0x0 0x69 0x0 0x6e 0x0 0x79 0x0 0x55 0x0 0x53 0x0 0x42 0x0 0x20 0x0 0x44 0x0 0x65 0x0 0x76 0x0 0x69 0x0 0x63 0x0 0x65 0x0
turn off txfe
input ep int
edpt int send xfer complete event
dcd xfer
rxflvl int
setup packed recvd
setup packed done
output ep int
h->d: 0x80 0x6 0x0 0x6 0x0 0x0 0xa 0x0
send xfer complete event
rxflvl int
setup packed recvd
setup packed done
output ep int
h->d: 0x80 0x6 0x0 0x1 0x0 0x0 0x12 0x0
dcd xfer
input ep int
d->h :0x12 0x1 0x0 0x2 0x0 0x0 0x0 0x40 0xfe 0xca 0x8 0x40 0x0 0x1 0x1 0x2 0x3 0x1
turn off txfe
input ep int
edpt int send xfer complete event
dcd xfer
rxflvl int
setup packed recvd
setup packed done
output ep int
h->d: 0x80 0x6 0x0 0x2 0x0 0x0 0x9 0x0
send xfer complete event
dcd xfer
input ep int
d->h :0x9 0x2 0x22 0x0 0x1 0x1 0x0 0xa0 0x32
turn off txfe
input ep int
edpt int send xfer complete event
dcd xfer
rxflvl int
setup packed recvd
setup packed done
output ep int
h->d: 0x80 0x6 0x0 0x2 0x0 0x0 0x22 0x0
send xfer complete event
dcd xfer
input ep int
d->h :0x9 0x2 0x22 0x0 0x1 0x1 0x0 0xa0 0x32 0x9 0x4 0x0 0x0 0x1 0x3 0x1 0x2 0x0 0x9 0x21 0x11 0x1 0x0 0x1 0x22 0x4d 0x0 0x7 0x5 0x81 0x3 0x8 0x0 0xa
turn off txfe
input ep int
edpt int send xfer complete event
dcd xfer
rxflvl int
setup packed recvd
setup packed done
output ep int
h->d: 0x0 0x9 0x1 0x0 0x0 0x0 0x0 0x0
send xfer complete event
edpt open
dcd xfer
input ep int
edpt int send xfer complete event
rxflvl int
setup packed recvd
setup packed done
output ep int
h->d: 0x21 0xa 0x0 0x0 0x0 0x0 0x0 0x0
dcd xfer
input ep int
edpt int send xfer complete event
rxflvl int
setup packed recvd
setup packed done
output ep int
h->d: 0x81 0x6 0x0 0x22 0x0 0x0 0x8d 0x0
dcd xfer
input ep int
d->h :0x5 0x1 0x9 0x2 0xa1 0x1 0x9 0x1 0xa1 0x0 0x5 0x9 0x19 0x1 0x29 0x5 0x15 0x0 0x25 0x1 0x95 0x5 0x75 0x1 0x81 0x2 0x95 0x1 0x75 0x3 0x81 0x1 0x5 0x1 0x9 0x30 0x9 0x31 0x15 0x81 0x25 0x7f 0x95 0x2 0x75 0x8 0x81 0x6 0x9 0x38 0x15 0x81 0x25 0x7f 0x95 0x1 0x75 0x8 0x81 0x6 0x5 0xc 0xa 0x38
turn off txfe
input ep int
edpt int send xfer complete event
dcd xfer
input ep int
d->h :0x2 0x15 0x81 0x25 0x7f 0x95 0x1 0x75 0x8 0x81 0x6 0xc0 0xc0
turn off txfe
input ep int
edpt int send xfer complete event
dcd xfer
rxflvl int
output ep int
send xfer complete event
rxflvl int
setup packed recvd
setup packed done
output ep int
h->d: 0x80 0x6 0x0 0x3 0x0 0x0 0xff 0x0
dcd xfer
input ep int
d->h :0x4 0x3 0x9 0x4
turn off txfe
input ep int
edpt int send xfer complete event
dcd xfer
rxflvl int
setup packed recvd
setup packed done
output ep int
h->d: 0x80 0x6 0x1 0x3 0x9 0x4 0xff 0x0
send xfer complete event
dcd xfer
input ep int
d->h :0x10 0x3 0x54 0x0 0x69 0x0 0x6e 0x0 0x79 0x0 0x55 0x0 0x53 0x0 0x42 0x0
turn off txfe
input ep int
edpt int send xfer complete event
dcd xfer
rxflvl int
setup packed recvd
setup packed done
output ep int
h->d: 0x80 0x6 0x0 0x3 0x0 0x0 0xff 0x0
send xfer complete event
dcd xfer
input ep int
d->h :0x4 0x3 0x9 0x4
turn off txfe
input ep int
edpt int send xfer complete event
dcd xfer
rxflvl int
setup packed recvd
setup packed done
output ep int
h->d: 0x80 0x6 0x2 0x3 0x9 0x4 0xff 0x0
send xfer complete event
dcd xfer
input ep int
d->h :0x1e 0x3 0x54 0x0 0x69 0x0 0x6e 0x0 0x79 0x0 0x55 0x0 0x53 0x0 0x42 0x0 0x20 0x0 0x44 0x0 0x65 0x0 0x76 0x0 0x69 0x0 0x63 0x0 0x65 0x0
turn off txfe
input ep int
edpt int send xfer complete event
dcd xfer
rxflvl int
setup packed recvd
setup packed done
output ep int
h->d: 0x80 0x6 0x1 0x3 0x9 0x4 0xff 0x0
send xfer complete event
dcd xfer
input ep int
d->h :0x10 0x3 0x54 0x0 0x69 0x0 0x6e 0x0 0x79 0x0 0x55 0x0 0x53 0x0 0x42 0x0
turn off txfe
input ep int
edpt int send xfer complete event
dcd xfer
rxflvl int
setup packed recvd
setup packed done
output ep int
h->d: 0x80 0x6 0x2 0x3 0x9 0x4 0xff 0x0
send xfer complete event
dcd xfer
input ep int
d->h :0x1e 0x3 0x54 0x0 0x69 0x0 0x6e 0x0 0x79 0x0 0x55 0x0 0x53 0x0 0x42 0x0 0x20 0x0 0x44 0x0 0x65 0x0 0x76 0x0 0x69 0x0 0x63 0x0 0x65 0x0
turn off txfe
input ep int
edpt int send xfer complete event
dcd xfer
rxflvl int
output ep int
send xfer complete event
dcd xfer
0x0 0x5 0x5 0x0 0x0
input ep int
d->h :0x0 0x5 0x5 0x0 0x0
turn off txfe
input ep int
edpt int send xfer complete event
dcd xfer
0x0 0x5 0x5 0x0 0x0
input ep int
d->h :0x0 0x5 0x5 0x0 0x0
turn off txfe
input ep int
edpt int send xfer complete event
dcd xfer
0x0 0x5 0x5 0x0 0x0
input ep int
d->h :0x0 0x5 0x5 0x0 0x0
turn off txfe
input ep int
edpt int send xfer complete event
dcd xfer
0x0 0x5 0x5 0x0 0x0
input ep int
d->h :0x0 0x5 0x5 0x0 0x0
turn off txfe
input ep int
edpt int send xfer complete event
dcd xfer
0x0 0x5 0x5 0x0 0x0
input ep int
d->h :0x0 0x5 0x5 0x0 0x0
turn off txfe
input ep int
edpt int send xfer complete event
dcd xfer
0x0 0x5 0x5 0x0 0x0
input ep int
d->h :0x0 0x5 0x5 0x0 0x0
turn off txfe
input ep int
edpt int send xfer complete event
dcd xfer
0x0 0x5 0x5 0x0 0x0
input ep int
d->h :0x0 0x5 0x5 0x0 0x0
turn off txfe
input ep int
edpt int send xfer complete event
send xfer complete event
dcd xfer
0x0 0x5 0x5 0x0 0x0
input ep int
d->h :0x0 0x5 0x5 0x0 0x0
turn off txfe
input ep int
edpt int send xfer complete event
dcd xfer
0x0 0x5 0x5 0x0 0x0
input ep int
d->h :0x0 0x5 0x5 0x0 0x0
turn off txfe
input ep int
edpt int send xfer complete event
dcd xfer
0x0 0x5 0x5 0x0 0x0
input ep int
d->h :0x0 0x5 0x5 0x0 0x0
turn off txfe
input ep int
edpt int send xfer complete event
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