UsbIrqRead
Description
Executes synchronous device-to-host Interrupt Transfer with a specific endpoint.
Syntax
ulrc = UsbIrqRead(Handle,ucEndpoint,ucAltSetting,pulNumBytes,pucData,ulTimeout)
Parameters
- Handle
- the Device Handle received from the previous UsbOpen.
- ucEndpoint
- the Endpoint Number with the Direction Bit set to one.
- ucAltSetting
- the Alternate Setting of the interface having this endpoint.
- pulNumBytes
- the address of the variable to specify/receive the number of bytes.
- pucData
- the address of the buffer to receive the data bytes transferred.
- ulTimeout
- the timeout to wait for completion in milliseconds.
Return Code
0x0000 - NO_ERROR
Errors
0x0006 - ERROR_INVALID_HANDLE 0x0008 - ERROR_NOT_ENOUGH_MEMORY 0x0057 - ERROR_INVALID_PARAMETER 0x005F - ERROR_INTERRUPT 0x0122 - ERROR_TOO_MANY_HANDLES 0x0280 - ERROR_TIMEOUT 0x1B58 - USB_NOT_INIT 0x1B5B - USB_ERROR_INVALID_ENDPOINT 0x4000 - USB_IORB_REQUEST 0x80XX - USB_IORB_FAILED 0xFF0D - ERROR_INVALID_DATA 0xFF13 - ERROR_I24_INVALID_PARAMETER 0xFF13 - USB_IDC_PARMERR 0xFF18 - USB_IDC_ADDRINV 0xFF37 - ERROR_DEV_NOT_EXIST 0xFF5D - EROR_NO_ITEMS 0xFFA7 - ERROR_LOCK_FAILED
Remarks
Example Code
//Code Snippet - UsbIrqRead
{
APIRET ulrc;
PUCHAR pucData;
PULONG pulNumBytes;
UCHAR ucAltSetting = 0;
UCHAR ucData[4096];
UCHAR ucEndpoint = 0x81;
ULONG ulNumBytes = sizeof(ucData);
ULONG ulTimeout = 8000;
pucData = &ucData[0]; pulNumBytes = &ulNumBytes;
ulrc = UsbIrqRead(Handle,ucEndpoint,ucAltSetting,pulNumBytes,pucData,ulTimeout);
printf("\nUsbIrqRead - ulrc: 0x%04X (%hu)",ulrc,ulrc);
if (!ulrc) //success
{
int i; printf(" - interrupt data:\n");
for (i=0;i<ulNumBytes;i++) printf("%02X",ucData[i]);
}
}