UsbIsoOpen

Description
Allocates bandwidth and resources for Isochronous Transfer.

Syntax
ulrc = UsbIsoOpen(Handle,ucEndpoint,ucAltSetting,usBufferCount,usFrameLength)

Parameters

 * Handle : the Device Handle received from the previous UsbOpen.


 * ucEndpoint : the Endpoint Number appropriate for the data transfer.


 * ucAltSetting : the Alternate Setting of the interface having this endpoint.


 * usBufferCount : the number of isochronous data buffers. Must not exceed 8.


 * usFrameLength : the maximum number of bytes in an isochronous frame.

Return Code
0x0000 - NO_ERROR

Errors
0x0037 - ERROR_DEV_NOT_EXIST 0x0057 - ERROR_INVALID_PARAMETER 0x1B58 - USB_NOT_INIT 0xFF13 - USB_IDC_PARMERR 0xFF14 - USB_IDC_ALLOCERR 0xFF15 - USB_IDC_NOBANDWIDTH 0xFF18 - USB_IDC_ADDRINV

Example Code
//Code Snippet - UsbIsoOpen { APIRET ulrc; UCHAR ucAltSetting = 1; UCHAR ucEndpoint = 0x86; USHORT usBufferCount = 3; USHORT usFrameLength = 0x44;

ulrc = UsbIsoOpen(Handle,ucEndpoint,ucAltSetting,usBufferCount,usFrameLength); printf("\nUsbIsoOpen - ulrc: 0x%04X (%hu)",ulrc,ulrc); }

Related Functions

 * UsbStartIsoTransfer
 * UsbIsoClose
 * UsbOpen