42 lines
2.2 KiB
Text
42 lines
2.2 KiB
Text
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* INFORMATION: *
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README file for the LAN8710A ethernet board driver for BeagleBone Rev. A6a
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created July 2013, JPEmbedded (info@jpembedded.eu)
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* INSTALLATION: *
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To install LAN8710A for BeagleBone under MINIX you have to edit /etc/inet.conf
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by adding line:
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eth0 lan8710a 0 { default; };
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and changing:
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psip0 { default; };
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to:
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psip1;
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Restart the system and the driver should work.
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* TESTS: *
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Driver was tested using various tools, i. e.
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* fetch - downloading file from the Internet and also local server. Every file
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downloaded well, but speed was about 50-200 kB/s.
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* ftp - downloading and uploading 20 MB file completed.
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* ping - checking connection between BeagleBone and computer passed using stan -
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dard settings, when we set ping requests interval to 200 ms it also
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passed. But with 20 ms and 2 ms driver dropped some packets (20 ms -
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about 20% loss, 2 ms - 50% loss).
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* udpstat, hostaddr, dhcpd, ifconfig, arp gave proper results.
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Tests passed, so driver meets the requirements of ethernet driver.
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* LIMITATION: *
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Download speed: 50-200 kB/s
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Low bandwidth is probably caused by memory copy functions. Standard Linux driver
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copies packets data directly to destination buffer using DMA. Minix driver needs
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to do a safe copy (sys_safecopyfrom and sys_safecopyto) from local buffer to the
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system buffer. This operation slows down the whole driver.
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