請問各位前輩

小弟目前利用WriteFile函式寫入一個HID裝置(共64byte), 然後利用ReadFile讀回寫入值時卻回傳錯誤碼87, 可否幫忙解答? 感謝

程式碼如下

//===================================================================================//
char InputReport[65];
DWORD NumberOfBytesRead;

Result = ReadFile(ReadHandle,
InputReport,
Capabilities.InputReportByteLength, // Capabilities.InputReportByteLength = 65(十進制);
&NumberOfBytesRead,
NULL);

int Result1 = GetLastError();

//===================================================================================//

最後發現 Result1 = 87 ; 傳入參數錯誤~~
請問各位前輩是我ReadFile的哪些參數設錯了嗎??

編輯記錄

BOOL ReadFile(
  HANDLE lpBuffer,  <-----------這個是指標，你傳的是數值
  DWORD lpNumberOfBytesRead,
  LPOVERLAPPED lpOverlapped
);


 

所以我的程式應該改成如下這樣嗎?

char InputReport[65];
DWORD NumberOfBytesRead;

Result = ReadFile(ReadHandle,
&InputReport,
Capabilities.InputReportByteLength, // Capabilities.InputReportByteLength = 65(十進制);
&NumberOfBytesRead,
NULL);

int Result1 = GetLastError();

編輯記錄

還是請問大大 我該怎麼修改呢?

可是小弟用WriteFile函式按照上面ReadFile寫入就成功 , 程式碼如下

//===============================================================//
DWORD BytesWritten;
ULONG Result;
char OutputReport[64] ;
unsigned int i;

OutputReport[0]=1;
for (i = 1; i < 64; i)
OutputReport[i] = 'X';

Result = WriteFile(DeviceHandle,
OutputReport,
Capabilities.OutputReportByteLength, // 65
&BytesWritten,
NULL);

//===============================================================//


Result =1 , 利用BUS Hound觀察有成功寫入USB裡!!