W5500 client-How to handle receiving large file

Question

Hello all: I am sending and receiving short strings to/from my server without any problem. I would like to be able to get large HEX file (updated firmware) , about 64K bytes, and looking for the best way to do it. I have to get the text data, convert it to binary and save it into memory while server sends the file. Do I have to manage the sever transmit activity by some “flow control” mechanism? Can I use interrupt to make receive more efficient? How W5500 manage the RX buffer and the RX pointers when data exceeds buffer size? Please advise… Thanks Dan

cellkey · Answer

Well, I made it… I can get the file ok, very easy, I must say… Lot easier than I thought… Thanks for participating and support… Dan …

cellkey · Answer

Hi, that was long ago. Please remind me the subject and what you want to achieve… Regards Dan

cellkey · Answer

Do you mean reading file text from server? If so I have to return to the code and share the relevant part. Dan

cellkey · Answer

Do you have any experience with the WZ5500? do u work with it some how?

cellkey · Answer

Well, I read your post about your problem. My code is to get a HEX file from my server which is used to update firmware of the host controller. This is about 50k bytes in size. I don’t yet understand your post stucture and the problems that you are facing with it… Dan

Vien Huy Nguyen · Answer

Hi Dan, Thank you for replying. I wanted to receive a large file send to the W5500 by the mean of a HTTP POST request. Did you modify the WIZnet’s httpServer library or did you write your own code from scratch to achieve your tasks?

cellkey · Answer

Hi, i have not changed any thing in libraries. My server knew to get a request to send a file which was uploaded to it in advance. The code send to sever a request message (my own protocol) and get into receiving loop in which it get file (about 50K bytes) in several reading interactions to a local memory. I can organize the relevant code and send it to you but it will take one or two days… Is that ok? Dan

cellkey · Answer

Hi, Attaching ZIP with few files for your inspection. The C file has the main proc RxUpdateFile which do the job. Try to understand the mechanism and if you still have questions ask me. I added my own receiving proc to socket.c file. Good luck Dan WZ5500_LAN_FileReceiv.ZIP (33.8 KB)

Vien Huy Nguyen · Answer

Thanks Dan. I really appreciate it.