W5200 driver for MSP430

I have made many fixes to the previous W5200 driver, including fixing some bugs. It is mainly for MSP430F5438a, but should also work for MSP430 "5" or "6". I have divided the code into blocks according to their function. For example, WIZnet-related files are named starting with "W5200". Debug-related files start with "console".

Current features:

• Full support for TCP/UDP/ICMP and DHCP client

• Contains UDP/TCP sample code

• Ethernet performance test code

• Serial port debugging station, capable of running tests and displaying the status of all W5200 registers

• BSD certified code

The biggest change in the code is to support the relevant tests for MSP430. I did a packet loss test and used the WIZnet client to send as much data as possible at the fastest speed (sending 2048 bytes via TCP), and then I used the command line tool "trafshow" to test the transmission and data throughput. By the way, there are no other hosts in this network system.

The test results are very interesting. When the MSP430 main CPU clock frequency is 16MHz and the W5200 SCLK is also 16MHz, I can send 73,000 bytes of data per second. When I increase the MSP430 and W5200 clock frequencies to 25MHz, the W5200 SPI communication begins to become abnormal.

I'm not sure if this was because I was using a breadboard or something else. When I finally got the MSP430 clock rate to 25MHz and the W5200 to 12.5MHz, I was able to get 105,000 bytes per second. This was interesting - it told me that the MSP430 CPU was limiting the data rate in the first place, not the W5200 chip.

To use this code, you need to configure the hardware according to the config.h file. As shown in the figure above, I used the MSP-EXP430F5438, connected the serial port pins, set the baud rate to 115200Baud, and the data format to 8N1. Use Code Composer to load the code into the board. When you click Run, some useless data will be displayed on the screen at first. Click "?" and an option menu will appear, which will give all the option functions that these codes can achieve.

Example: