找到了这个帖子
# if you use a non 8 pixel wide font, this is needed
1sudo apt-get install kbd2sudo dpkg-reconfigure console-setup3Encoding to use on the console: <UTF-8>
4Character set to support: <Guess optimal character set>
5Font for the console: Terminus (default is VGA)
6Font size: 6x12 (framebuffer only)
需要说明下，在小屏上选择ramebuffer only能正常用，不带framebuffer only的用nano时第一行会出错
原文是2.8寸屏，实测3.5寸屏也可以
默认驱动出来的字体太难辨认了，占地方还多，修改之后好多了
另：
微雪3.5寸屏幕驱动方式看这里
另外一个 https://github.com/goodtft/LCD-show
https://my.oschina.net/u/2396236/blog/1637885