{"id":162,"date":"2019-01-04T10:54:20","date_gmt":"2019-01-04T18:54:20","guid":{"rendered":"http:\/\/35.243.195.209\/?page_id=162"},"modified":"2019-07-13T12:59:42","modified_gmt":"2019-07-13T19:59:42","slug":"posts","status":"publish","type":"page","link":"https:\/\/nanzhou.cc\/index.php\/posts\/","title":{"rendered":"Posts"},"content":{"rendered":"

About Posts<\/h2>\n

Posts are more\u00a0formal than WiKi, in which I will do some research and try to dive deeper. I will also present the references at the end of posts.<\/p>\n

All Posts<\/h2>\n

Most recent posts in chronological order:<\/p>\n

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\r\n \r\n\t\tPCIe Sysfs\t<\/a>\r\n\t<\/div>\r\n
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My desktop [hi on] nanzhou@nanzhou2:~$ lspci00:00.0 Host bridge: Advanced Micro Devices, Inc. [AMD] Starship\/Matisse Root Complex00:00.2 IOMMU: Advanced Micro Devices, ...
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fighternan<\/a><\/span> \/ <\/span> Embedded<\/a><\/span><\/div>\t<\/div>\r\n<\/div><\/div>\n
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\r\n \r\n\t\tPCIe Basics\t<\/a>\r\n\t<\/div>\r\n
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1. The Evolutionary Leap: From PCI to PCIe In the 1990s and early 2000s, motherboards relied on PCI and PCI-X ...
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fighternan<\/a><\/span> \/ <\/span> Embedded<\/a><\/span><\/div>\t<\/div>\r\n<\/div><\/div>\n
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\r\n \r\n\t\tBit-banging\t<\/a>\r\n\t<\/div>\r\n
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Bit-banging is a slang term in embedded systems and computer engineering for a technique where software directly controls the state ...
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fighternan<\/a><\/span> \/ <\/span> Embedded<\/a><\/span><\/div>\t<\/div>\r\n<\/div><\/div>\n
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\r\n \r\n\t\tBazel: select\t<\/a>\r\n\t<\/div>\r\n
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Think of select() as a conditional expression that lives inside your build rules. It functions exactly like a switch or ...
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fighternan<\/a><\/span> \/ <\/span> Toolchain<\/a><\/span><\/div>\t<\/div>\r\n<\/div><\/div>\n
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\r\n \r\n\t\tBazel: platforms\t<\/a>\r\n\t<\/div>\r\n
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Summary Table ConceptWhat it isAnalogyConstraint SettingA property category\"Vehicle Type\"Constraint ValueA specific option\"Car\", \"Truck\", \"Motorcycle\"PlatformA group of settings\"Vehicle configured for highway ...
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fighternan<\/a><\/span> \/ <\/span> Toolchain<\/a><\/span><\/div>\t<\/div>\r\n<\/div><\/div>\n
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\r\n \r\n\t\tsysfs-USB\t<\/a>\r\n\t<\/div>\r\n
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USB Controller fighternan# ls \/sys\/bus\/usb\/devices\/ -l lrwxrwxrwx 1 root root 0 Jan 1 00:28 usb1 -> ..\/..\/..\/devices\/platform\/0.soc\/878010000000.pci\/pci0001:00\/0001:00:0c.0\/usb1 lrwxrwxrwx 1 root ...
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fighternan<\/a><\/span> \/ <\/span> Linux<\/a>, Operation Systems<\/a><\/span><\/div>\t<\/div>\r\n<\/div><\/div>\n
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\r\n \r\n\t\tC++ 20 Features\t<\/a>\r\n\t<\/div>\r\n
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Coroutines Coroutines\u00a0are special functions that can have their execution suspended and resumed. To define a coroutine, the\u00a0co_return,\u00a0co_await, or\u00a0co_yield\u00a0keywords must be ...
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fighternan<\/a><\/span> \/ <\/span> C++<\/a>, Programming Language<\/a><\/span><\/div>\t<\/div>\r\n<\/div><\/div>\n
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\r\n \r\n\t\tC++ 17 Features\t<\/a>\r\n\t<\/div>\r\n
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std::string_view \/\/ Regular strings. std::string_view cppstr {\"foo\"}; \/\/ Wide strings. std::wstring_view wcstr_v {L\"baz\"}; std::optional A common use case for optional ...
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fighternan<\/a><\/span> \/ <\/span> C++<\/a>, Programming Language<\/a><\/span><\/div>\t<\/div>\r\n<\/div><\/div>\n
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\r\n \r\n\t\tWordPress Docker Autostart\t<\/a>\r\n\t<\/div>\r\n
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VM docker update --restart unless-stopped $container_name Container # start apache2 at boot up update-rc.d apache2 defaults # check init.d config ...
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fighternan<\/a><\/span> \/ <\/span> Web<\/a>, Wordpress<\/a><\/span><\/div>\t<\/div>\r\n<\/div><\/div>\n
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\r\n \r\n\t\tAnalyze Coredumps in Yocto\t<\/a>\r\n\t<\/div>\r\n
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Got a coredump Let's say a daemon got a segmentation fault. $ coredumpctl TIME PID UID GID SIG COREFILE EXE ...
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fighternan<\/a><\/span> \/ <\/span> Debug<\/a>, OpenBMC<\/a><\/span><\/div>\t<\/div>\r\n<\/div><\/div><\/div><\/div><\/div>\n