//Bits 3-5 of IR denote addressing mode of instruction
int irAddressMode = (ir >> 2) & 0x07;通过使用0x03对ir中保存的值进行ANDing,我们只剩下位模式中的第6-7位的值(以小端字节顺序工作)。然而,我不理解第一行中需要>>运算符,为什么在ANDing之前需要先执行(ir >> 2),才能找到ir变量中第3-5位的值?
to set address.[ 5575.781728] usb 3-5:3-5: Device not responding to set address.
[ 5576.301606] usb 3-5: device not accepting address 104,5577.137411] usb 3-5: Device not responding to set add