I am still trying to get data from my device.
I came back to my attempt to use readpipe in the
usbsimpleexample project, in dealwithpipes function.
I get a data overrun error. What is it? How do I figure out
what size gBuffer should be? The device puts out 8bits at a
time, one byte every 10msec.
-----------------------------------------------------------
Reference
I read how to understand the error code ox38 ox00 ox2e8
http://developer.apple.com/qa/qa2001/qa1075.html
looking up in IOreturn.h, 0x028 is data overrun
#define kIOReturnOverrun iokit_common_err(0x2e8) //
numBytesRead = sizeof(gBuffer) - 1;
err = (*intf)->ReadPipe(intf, inPipeRef, gBuffer, &numBytesRead);
if (err)
{
printf("Unable to perform read %2x %4x
%4x\n",err_get_system(err),err_get_sub(err),err_get_code(err));
}
for (i = 0; i < numBytesRead; i++)
gBuffer[i] = ~gBuffer[i];
printf("Read %s (%ld bytes) from endpoint\n", gBuffer, numBytesRead);
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