STM32 IO口模拟实现软件串口。
IO口模拟串口的思路也比较简单,一切按串口协议进行操作即可。
对于发送,计算好不同波特率对应的延时时间进行数据发送。
对于接收,稍微复杂。通过外部中断检测接收管脚的下降沿,检测到起始信号后开启定时器,定时器按照波特率设定好时间,每隔一段时间进入定时器中断接收数据,完成一个字节后关闭定时器。
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TXD : PC13
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RXD : PB14
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波特率:9600 ,1-8-N
接收11个数据,然后把接收到的数据发送出去。
This project forked from tonyiot/softwareserial
STM32 IO口模拟实现软件串口。
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