Search found 3 matches

by sportybj
Fri Nov 18, 2016 1:33 am
Forum: Report Bugs
Topic: bug on RTOS SDK 1.5.0
Replies: 1
Views: 7117

bug on RTOS SDK 1.5.0

Please check RTOS SDK 1.5.0, which is in poor QA. Please find in file include/lwip/lwip/multi-threads/sockets_mt.h, there is something like: #define bind(a,b,c) lwip_bind_mt(a,b,c); which will cause error when compling statements like while ( bind(xxx)<0 ) People can hardly believe that the version ...
by sportybj
Thu Aug 04, 2016 1:43 pm
Forum: ESP8266 SDK
Topic: New FEATURES gathering
Replies: 82
Views: 100874

Re: New FEATURES gathering

25KHz PWM. In some application, e.g. DC motor driving, PWM may cause accoustic nose. A simple solution is to use PWM with the frequency around 25KHz. As pwm resolution has been 45ns, that means it is complete feasable to upgrade PWM frequency to 25KHz with the resolution better than 512; I have noti...
by sportybj
Wed Aug 03, 2016 7:06 pm
Forum: ESP8266 SDK
Topic: 请求提高PWM频率至25KHz
Replies: 1
Views: 1833

请求提高PWM频率至25KHz

不知道是不是应该发在这里,如果不是,请告发在哪里更合适

有一些应用中,比如电机控制,PWM会产生噪音,最简单的解决办法就是把PWM的频率提高到25KHz。我看过一个贵公司的回复帖http://bbs.espressif.com/viewtopic.php?f=7&t=546&p=2053&hilit=pwm+45ns#p2048,其中说贵公司已经把PWM的精度做到了45ns。依此,如果频率提高到25KHz时,分辨率仍可超过512。一年前贵公司就询间频率需求是就有人提出过,至今未见响应。故以早日实现为盼。

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