I imported the Print class to my C++ project then attached it to the adafruit Arduino library. The nice thing is that I wanted to change the display from a 4linex20 SPI character display to a TFT ILI9341. But if one wants to use Arduino type code C++ then one has to pay the devil. Oh the wonders of object oriented programming and data hiding I have not been much of a fan of C++ on embedded for this reason. Then when the next call happened the next buffer was issued. Only the first DMA buffer was being served.ĭeconstructing the lwip showed how this was copied into the buffer chain, the DMA buffer then needed to be released.
#MAPLESTORY PACKET SENDER DRIVER#
(took me several days of searching to find where the ISR was instantiated deep in the driver code) I found that the buffers pointed to many of the packets even though I only wanted one. When the HAL_ETH receives a packet it is in DMA. What the mid level driver does is allocate a chain of linked buffers. Capture what is being sent, and see what is being missed. One still has to poll for next packet availabe from the DMA system. I chose the latter as it was an option in the CubeMX setup. There are two ways of handling Packet reception. That said, the best advice was to tear apart lwip and use only the parts that one needs. I have learned not to click on anything foreign. These show up as new (in the last month or 24 hours.) Then hit you with a browser redirect. Most of the other sites are me too, broken links, Obsolete examples, or else they are phishing nets that have harvested old messages and preform necropicy. Most of the stuff is PDFs that simply harvest the Doxgen comments and list the calling functions. There is not a lot online about lwip or the low level HAL_ETH. (a minute is about 13MB in the wireshark pcap dump.)
A few seconds generates 100s of 1K packets.
This code floods the local net with UDP packets. I just managed to port some Atmel 32UC3 code that uses UDP. I was having almost the same exact problem.