Hello!
I'm using u-boot 1.1.6 on a custom PCB of ours when we are prototyping some hardware. I would like to transfer files over the ethernet to and from the card using tftp and it seemed natural trying to use the built-in u-boot functionality for this.
I have written a tftpwrite function which works well from command line in much the same way as tftpboot (but in the other direction of course). Now, I would like to call this function from my stand-alone program to transfer files to and from memory regions which I specify.
To make things as easy as possible, I have created a TftpPut and TftpGet function which takes arguments as filename, load address and size and then set the "usual" variables used by existing function TftpStart and newly written TftpWrite.
I have added TftpPut and TftpGet to _exports.h and I can compile and link my stand-alone program to this customized version of u-boot. However, the function doesn't seem to actually be called. As far as I can see, the calls to TftpPut and TftpGet look much the same as the u-boot built-in printf call (which works perfectly). If I "go" to the address of the function TftpPut or TftpGet directly from the u-boot prompt, I can see that it works as expected, but why can't I call it from my stand-alone program?
Are there any more steps I have to do to make the new functions play nicely with the rest of u-boot, or can anyone think of any other thing which could be causing the problem? I don't get any errors, it just seem that the functions are either never actually called or disregarded somehow when supposed to be taken care of by u-boot...
Best regards,
/Jakob