将Windows API移植到linux，USB HID设备读取
我使用一个USB HID设备，一个带LED的按钮。有两个API用于访问设备。一个用于windows，一个用于linux。不幸的是，linux API没有读取按钮状态（按下/释放）的功能，但windows API有此功能。我想将现有功能移植到linux API。我已经试过好几次了，但还不能从USB设备获取数据 从设备读取现有和功能性windows实现的步骤：将Windows API移植到linux，USB HID设备读取,linux,usb,api-design,porting,Linux,Usb,Api Design,Porting,我使用一个USB HID设备，一个带LED的按钮。有两个API用于访问设备。一个用于windows，一个用于linux。不幸的是，linux API没有读取按钮状态（按下/释放）的功能，但windows API有此功能。我想将现有功能移植到linux API。我已经试过好几次了，但还不能从USB设备获取数据 从设备读取现有和功能性windows实现的步骤： 首先是一个具有id和四个字符的写入操作（在要写入的第一个字符中配置了0x02） 然后对与之前写操作相同的结构执行读操作。该状态的读
- 首先是一个具有id和四个字符的写入操作（在要写入的第一个字符中配置了0x02）
- 然后对与之前写操作相同的结构执行读操作。该状态的读取位置与之前写入时放置的0x02位置相同 PACDRIVE_API BOOL_stdcall USBButtonGetState（内部id，PBOOL状态） { if（m_hidDeviceData[id].Type！=DEVICETYPE_USBBUTTON） 虚假的 }
bool writeUSBButton(unsigned char* barray, int autoconnect, bool transfer, unsigned int size)
{
libusb_context *ctx = NULL;
struct libusb_device_handle *handle = NULL;
unsigned char mesg[USBBTN_MESG_LENGTH] = {0,0,0,0};
bool result = true;
int pos = 0;
int ret = 0;
if (transfer)
{
handle = openUSB(ctx, USBBTN_VENDOR, USBBTN_PRODUCT, USBBTN_INTERFACE, autoconnect);
if (!handle)
{
result = false;
goto error;
}
}
while (pos < size)
{
memcpy(&mesg[0], &barray[pos], 4);
debug ("Writing (%i): %x, %x, %x, %x", pos, mesg[0], mesg[1], mesg[2], mesg[3]);
if (transfer)
{
ret = libusb_control_transfer(handle,
UM_REQUEST_TYPE,
UM_REQUEST,
USBBTN_VALUE,
USBBTN_INTERFACE,
mesg,
USBBTN_MESG_LENGTH,
UM_TIMEOUT);
debug ("Write result: %i", ret);
}
pos+=USBBTN_MESG_LENGTH;
}
exit:
if (transfer)
{
closeUSB(ctx, handle, USBBTN_INTERFACE);
}
else
{
log_info ("board array was not written out!!!");
}
return result;
error:
return result;
}
> Setup Data (read)
> bmRequestType:
> 1... .... = Direction: Device to Host
> .01. .... = Type: Class (0x1)
> ...0 0000 = Recipient: Device (0x00)
> 1010 0000 -> 0xa0(hex)
bool readUSBButton(unsigned char* barray, int autoconnect, bool transfer, unsigned int size)
{
// barray[0] = 0x02;
// barray[1] = 0x00;
// barray[2] = 0x00;
// barray[3] = 0x00;
// result = writeUSBButton(barray, 1, true, USBBTN_MESG_LENGTH);
libusb_context *ctx = NULL;
struct libusb_device_handle *handle = NULL;
// USBBTN_MESG_LENGTH = 4
unsigned char mesg[USBBTN_MESG_LENGTH] = {0,0,0,0};
bool result = true;
int pos = 0;
int ret = 0;
if (transfer)
{
handle = openUSB(ctx, USBBTN_VENDOR, USBBTN_PRODUCT, USBBTN_INTERFACE, autoconnect);
if (!handle)
{
result = false;
goto error;
}
}
while (pos < size)
{
debug ("reading (%i): %x, %x, %x, %x", pos, mesg[0], mesg[1], mesg[2], mesg[3]);
if (transfer)
{
uint8_t buttonData;
ret = libusb_control_transfer (handle, 0xA0, 2, 0, 0, &buttonData, 1, 0);
printf(" #### Read: %x ###### ret= %i", buttonData , ret);
debug ("read result: %i", ret);
}
pos+=USBBTN_MESG_LENGTH;
}
exit:
if (transfer)
{
closeUSB(ctx, handle, USBBTN_INTERFACE);
}
else
{
log_info ("board array was not read !!!");
}
return result;
error:
return result;
}
> Setup Data (read)
> bmRequestType:
> 1... .... = Direction: Device to Host
> .01. .... = Type: Class (0x1)
> ...0 0000 = Recipient: Device (0x00)
> 1010 0000 -> 0xa0(hex)
bool readUSBButton(unsigned char* barray, int autoconnect, bool transfer, unsigned int size)
{
// barray[0] = 0x02;
// barray[1] = 0x00;
// barray[2] = 0x00;
// barray[3] = 0x00;
// result = writeUSBButton(barray, 1, true, USBBTN_MESG_LENGTH);
libusb_context *ctx = NULL;
struct libusb_device_handle *handle = NULL;
// USBBTN_MESG_LENGTH = 4
unsigned char mesg[USBBTN_MESG_LENGTH] = {0,0,0,0};
bool result = true;
int pos = 0;
int ret = 0;
if (transfer)
{
handle = openUSB(ctx, USBBTN_VENDOR, USBBTN_PRODUCT, USBBTN_INTERFACE, autoconnect);
if (!handle)
{
result = false;
goto error;
}
}
while (pos < size)
{
debug ("reading (%i): %x, %x, %x, %x", pos, mesg[0], mesg[1], mesg[2], mesg[3]);
if (transfer)
{
uint8_t buttonData;
ret = libusb_control_transfer (handle, 0xA0, 2, 0, 0, &buttonData, 1, 0);
printf(" #### Read: %x ###### ret= %i", buttonData , ret);
debug ("read result: %i", ret);
}
pos+=USBBTN_MESG_LENGTH;
}
exit:
if (transfer)
{
closeUSB(ctx, handle, USBBTN_INTERFACE);
}
else
{
log_info ("board array was not read !!!");
}
return result;
error:
return result;
}
Bus 001 Device 006: ID d209:1200 Ultimarc
Device Descriptor:
bLength 18
bDescriptorType 1
bcdUSB 2.00
bDeviceClass 0
bDeviceSubClass 0
bDeviceProtocol 0
bMaxPacketSize0 8
idVendor 0xd209 Ultimarc
idProduct 0x1200
bcdDevice 0.01
iManufacturer 2 USBButton
iProduct 2 USBButton
iSerial 1 1
bNumConfigurations 1
Configuration Descriptor:
bLength 9
bDescriptorType 2
wTotalLength 0x003b
bNumInterfaces 2
bConfigurationValue 1
iConfiguration 2 USBButton
bmAttributes 0xa0
(Bus Powered)
Remote Wakeup
MaxPower 100mA
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 0
bAlternateSetting 0
bNumEndpoints 1
bInterfaceClass 3 Human Interface Device
bInterfaceSubClass 0
bInterfaceProtocol 0
iInterface 2 USBButton
HID Device Descriptor:
bLength 9
bDescriptorType 33
bcdHID 1.11
bCountryCode 0 Not supported
bNumDescriptors 1
bDescriptorType 34 Report
wDescriptorLength 33
Report Descriptors:
** UNAVAILABLE **
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x81 EP 1 IN
bmAttributes 3
Transfer Type Interrupt
Synch Type None
Usage Type Data
wMaxPacketSize 0x0008 1x 8 bytes
bInterval 10
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 1
bAlternateSetting 0
bNumEndpoints 1
bInterfaceClass 3 Human Interface Device
bInterfaceSubClass 1 Boot Interface Subclass
bInterfaceProtocol 1 Keyboard
iInterface 2 USBButton
HID Device Descriptor:
bLength 9
bDescriptorType 33
bcdHID 1.11
bCountryCode 0 Not supported
bNumDescriptors 1
bDescriptorType 34 Report
wDescriptorLength 168
Report Descriptors:
** UNAVAILABLE **
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x82 EP 2 IN
bmAttributes 3
Transfer Type Interrupt
Synch Type None
Usage Type Data
wMaxPacketSize 0x0008 1x 8 bytes
bInterval 10
can't get device qualifier: Resource temporarily unavailable
can't get debug descriptor: Resource temporarily unavailable
Device Status: 0x0000
(Bus Powered)