bigbaicai

芯方式是以半导体人、电子工程师等电子行业相关领域从业人员为核心的知识经验学习、分享、交流社群。 凭借开放、合作、共赢的运营理念,聚集了来自国内外知名院校和顶尖科技公司的半导体人、电子工程师。 我们致力于营造专业、认真、有温度的分享交流环境,将高质量的内容和方案成规模地生产和分享,帮助个人和团队在芯方式找到有价值的Key。 http://www.icfans.com/

mt2523 [keypad]General GPIO can be used

0
阅读(155) 评论(0)

mt2523 [keypad]General GPIO can be used as keypad pin?

1.No, keypad driver only support hardware detect key, only use the special GPIO which have KEYPAD mode to detect key.


2、The keypad column pins are GPIO18~20, the row pins are GPIO21~23.



3、When use keypad , you should ensure at least one column and one row.


4、If you want to use general GPIO as keypad , you cannot use hardware keypad module to detect key, and mustachieve keypad scan flow by your own software.