{"url":"https://toshi-hirasawa.hatenadiary.org/entry/20130422/1366686300","blog_url":"https://toshi-hirasawa.hatenadiary.org/","author_url":"https://blog.hatena.ne.jp/toshi_hirasawa/","image_url":null,"provider_name":"Hatena Blog","published":"2013-04-22 12:05:00","provider_url":"https://hatena.blog","categories":[],"version":"1.0","blog_title":"toshi_hirasawa\u306e\u65e5\u8a18","width":"100%","author_name":"toshi_hirasawa","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Ftoshi-hirasawa.hatenadiary.org%2Fentry%2F20130422%2F1366686300\" title=\" \u30e9\u30ba\u30d1\u30a4L\u30c1\u30ab\u3000shell(system\u95a2\u6570)\u3092\u4f7f\u3063\u3066\u307f\u305f\u3089\u3000\u7d0480Hz - toshi_hirasawa\u306e\u65e5\u8a18\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","title":" \u30e9\u30ba\u30d1\u30a4L\u30c1\u30ab\u3000shell(system\u95a2\u6570)\u3092\u4f7f\u3063\u3066\u307f\u305f\u3089\u3000\u7d0480Hz","description":"\u6c38\u4e45\u30eb\u30fc\u30d7\u306b\u3057\u3066\u3001\u6ce2\u5f62\u3092\u307f\u3066\u307f\u308b\u3068 \u7d0480Hz(12msec\u5468\u671f\uff09\u3050\u3089\u3044\u3067\u3057\u305f\u3002 \u306a\u308b\u307b\u3069\u9045\u3044\u308f echo \\\"7\\\"\u306e\u30a8\u30b9\u30b1\u30fc\u30d7\u3063\u3066\u306a\u3093\u304b\u3060\u3055\u304f\u306d\uff1f\u3068\u304b\u304a\u3082\u3044\u307e\u3057\u305f root@raspi-81:~# cat gpio_sh.c #include <stdio.h> int main(int argc ,char* argv[]) { int i; system(\"echo \\\"7\\\" > /sys/class/gpio/export \"); system(\"echo \\\"out\\\" > /sys/class/gpio/gpio7/direction \"); //for(i=0 ; i < 1\u2026","height":"190","type":"rich"}