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

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]); } }

Related Functions

 * UsbIrqWrite
 * UsbDataTransfer
 * UsbOpen