求usb接口读写的文档、代码资料

1万 · 2019-2-14 15:31

求usb接口读写的文档、代码资料

1万 · 2019-2-14 15:34

你可以看看cypress公司EZUSB芯片AN2131QC全部的文档

1万 · 2019-2-14 15:37

对，有一个叫做EzMr的主机程序，是一个VC++程序

1万 · 2019-2-14 15:39

ddk下有不少例子
思路大体如下：
<1> . 打开设备，获取设备句柄CreateFile( "\\\\.\\ezusb-0 ",.......)；
<2> . 设置Interface；获取 PipesInfo；
<3> . 用 Bulk 或其它方式传输数据；
<4> . 关闭设备。

1万 · 2019-2-14 15:41

HANDLE OpenDevice(LPGUID pGuid, char *outNameBuf)
{
HANDLE hOut = INVALID_HANDLE_VALUE;
HDEVINFO hardwareDeviceInfo;
SP_INTERFACE_DEVICE_DATA deviceInfoData;

hardwareDeviceInfo = SetupDiGetClassDevs (pGuid, NULL, NULL, (DIGCF_PRESENT | DIGCF_INTERFACEDEVICE));

deviceInfoData.cbSize = sizeof (SP_INTERFACE_DEVICE_DATA);

if (SetupDiEnumDeviceInterfaces (hardwareDeviceInfo, 0, pGuid, 0, &deviceInfoData))
{
hOut = OpenOneDevice (hardwareDeviceInfo, &deviceInfoData, outNameBuf);

if (hOut==INVALID_HANDLE_VALUE)
return INVALID_HANDLE_VALUE;
}

DWORD reErr = GetLastError( );

SetupDiDestroyDeviceInfoList (hardwareDeviceInfo);

return hOut;
}

HANDLE OpenOneDevice(HDEVINFO HardwareDeviceInfo, PSP_INTERFACE_DEVICE_DATA DeviceInfoData, char *devName)
{
PSP_INTERFACE_DEVICE_DETAIL_DATA functionClassDeviceData = NULL;
ULONG predictedLength = 0;
ULONG requiredLength = 0;
HANDLE hOut = INVALID_HANDLE_VALUE;

// allocate a function class device data structure to receive the goods about this particular device.
SetupDiGetInterfaceDeviceDetail (HardwareDeviceInfo, DeviceInfoData, NULL, 0, &requiredLength, NULL);

predictedLength = requiredLength;
// sizeof (SP_FNCLASS_DEVICE_DATA) + 512;

functionClassDeviceData = (PSP_INTERFACE_DEVICE_DETAIL_DATA)malloc (predictedLength);
functionClassDeviceData-> cbSize = sizeof (SP_INTERFACE_DEVICE_DETAIL_DATA);

// Retrieve the information from Plug and Play.
if (!SetupDiGetInterfaceDeviceDetail(
HardwareDeviceInfo,
DeviceInfoData,
functionClassDeviceData,
predictedLength,
&requiredLength,
NULL))
{
free(functionClassDeviceData);
return INVALID_HANDLE_VALUE;
}

strcpy(devName,functionClassDeviceData-> DevicePath);
printf( "Attempting to open %s\n ", devName);

hOut = CreateFile (functionClassDeviceData-> DevicePath,
GENERIC_READ | GENERIC_WRITE,
FILE_SHARE_READ | FILE_SHARE_WRITE,
NULL,
OPEN_EXISTING,
0,
NULL);

if (INVALID_HANDLE_VALUE == hOut)
printf( "FAILED to open %s\n ", devName);

free(functionClassDeviceData);

return hOut;
}

HANDLE hDEV = OpenDevice((LPGUID)&GUID_BUS_UMSS, completeDeviceName);
if (hDEV==INVALID_HANDLE_VALUE)
return;

DeviceIoControl (
hDEV,
IOCTL_Vender_VCMD_WRITE,
buf,
31, //CBW
buf,
13, // Data + CSW
(LPDWORD)&nBytes,
NULL
);

1万 · 2019-2-14 15:44

嗯，我了解了