本帖最后由 ColeYao 于 2021-1-25 09:31 编辑
如图，因为不小心把串口收发端搞反了，而stm32F407不支持收发端软件切换，且115200bps使用软件模拟串口误码率太高不能满足使用要求，故使用DMA+定时器方式模拟串口。现在的问题是模拟串口发送时，偶尔会出错（加不同的前导字节，出错的数据不一样，但前导字节固定后，每次出错都是一样的情况，且出错的几率不固定，有时候几率高，有时候几率低），如附件所示，加前导字节用处不大，有谁知道是啥原因，该如何解决吗？
因为发不了附件，就直接贴stm32F407发送后PC端收到的数据了！
Cole!Hello,I am Cole!Hello,I am Cole!Hello,I am Cole!Hello,I am Cole!Hello,I am Cole!Hello,I am Cole!Hello,I am Cole!Hello,I am Cole!Hello,I am Cole!Hello,I am Cole!Hello,I am Cole!Hello,I am Cole!Hello,I am Cole!Hello,I am Cole!Hello,I am Cole!Hello,I am Cole!Hello,I am Cole!Hello,I am Cole!Hello,I am Cole!Hello,I am Cole!Hello,I am Cole!Hello,I am Cole!Hello,I am Cole!Hello,I am Cole!Hello,I am Cole!Hello,I am Cole!嬰?
祦Cole!Hello,I am Cole!Hello,I am Cole!Hello,I am Cole!Hello,I am Cole!Hello,I am Cole!Hello,I am Cole!Hello,I am Cole!Hello,I am Cole!Hello,I am Cole!Hello,I am Cole!Hello,I am Cole!Hello,I am Cole!Hello,I am Cole!Hello,I am Cole!Hello,I am Cole!Hello,I am Cole!Hello,I am Cole!Hello,I am Cole!Hello,I am Cole!Hello,I am Cole!Hello,I am Cole!Hello,I am Cole!Hello,I am Cole!Hello,I am Cole!Hello,I am Cole!Hello,I am Cole!Hello,I am Cole!Hello,I am Cole!Hello,I am Cole!Hello,I am Cole!Hello,I am Cole!Hello,I am Cole!Hello,I am Cole!Hello,I am Cole!Hello,I am Cole!Hello,I am Cole!嬰?
祦Cole!Hello,I am Cole!Hello,I am Cole!
|
|
楼主
标题置顶
标题高亮
