>From: "Russell Krayer" <[EMAIL PROTECTED]> >To: [EMAIL PROTECTED], [EMAIL PROTECTED] >CC: hplip-devel@lists.sourceforge.net >Subject: Re: [HPLIP-Devel] big-endian troubles scanning? >Date: Thu, 26 Oct 2006 19:57:56 -0400 > >I'm getting a little suspicious of the htole16 macro used in device.cpp, >Device::WriteECPChannel(). I wrote this test code and tried it on both of >my boxes, the AMD64 box and the powerpc. The output was the same on both >boxes: > >-------------------------------------- >#include <iostream> >#include "hpiod.h" > >using namespace std; > >int >main(int argc, char* argv[]) >{ > unsigned short value = 1; > > cout << "Value: " << value << endl; > cout << "hotle16(value): " << htole16(value) << endl; > > return 0; >} >------------------------------------------------------------------- > >But, I'm not sure if I built my test executables correctly. I see the >#define WORDS_BIGENDIAN controls this macro but I don't understand exactly >how the configure stuff sets it up. Perhaps WORDS_BIGENDIAN is not getting >defined on the powerpc platform. In any case, this macro might deserve >some scrutiny. > > >Regards, >Russ Krayer > > Ok, I see now that the Makefile on the powerpc has -DWORDS_BIGENDIAN=1 in the DEFS variable. And so I compiled my test program that way and then the output was swapped vs the AMD64 box. Then, I ran it with the value 77 and the output (in hex) was 4d00. Interestingly enough, 4d00 and 004d are one of the discrepancies in the usbmon output I captured and posted a few days ago. I tried 77 because of this line in mlc.cpp in MlcChannel::Open() right after the ClaimInterface() call:
if (pDev->WriteECPChannel(fd, 77)) I'm tempted to build without the -DWORDS_BIGENDIAN=1to see what happens but it doesn't really make sense to me that I should have to do so. Regards, Russ Krayer ------------------------------------------------------------------------- Using Tomcat but need to do more? Need to support web services, security? Get stuff done quickly with pre-integrated technology to make your job easier Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642 _______________________________________________ HPLIP-Devel mailing list HPLIP-Devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/hplip-devel