问题如题,串口1配置为GPIO模式,用直通线与电脑COM1相连,在串口调试助手发送0xAA后DR1引脚处能测到正常的电压波形,但是程序中没有接收到,期待大神解惑
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xuan Song 说:电路连接是按照该示意图连得,不知道DR1与FSR1相连起什么作用,期待大神解惑
Since each UART word starts with a falling edge to indicate the start bit, this edge can be used as the active-low frame sync input. This is why both the data and frame sync inputs are connected to the UART's output