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使用的芯片是FR8016HA 串口引脚：PA4(U0TXD)，PA5(U0RXD) 问题如下： 运行ble_drivers_demo(demo_uart0)程序测试UART0串口，无法通过中断的方式接受数据，但可以通过查询的方式接受数据。