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请问FR801xH外接PA芯片怎么初始化？
system_set_port_mux(GPIO_PORT_A, GPIO_BIT_7, PORTA7_FUNC_ANT_CTL0); // PA TX system_set_port_mux(GPIO_PORT_A, GPIO_BIT_5, PORTA5_FUNC_ANT_CTL1); // PA RX