PIC单片机控制AS3933接收和发送 IRQ_COUNT = 0; // all I/O digital AD1PCFG = 0xFFFF; // set as output TRISA = ~0x001C; TRISB = ~0xE01F; // turn on internal pull ups for switch BUTTON_INTERNAL_PULL_UP = 1; EXT_INT_VBUS_INTERNAL_PULL_UP = 0;