ARM has 7 basic working modes User: non-privileged mode, most tasks are executed in this mode FIQ: this mode is entered when a high priority (fast) interrupt occurs IRQ: this mode is entered when a
Ordinary photoelectric switches, whether they are through-beam or reflective, have four pins. Two of the pins are the pins of the infrared emitting diode, and the other two are the pins of the phototr
;Using AT89C2051 single-chip microcomputer, crystal oscillator 11.0592MHZ, communication rate 9600, using TTL serial port communication ; the receiving board is SB-JS1-L4 super regenerative latch type
With the development of wireless radio frequency technology, short-range wireless communication technologies with significant advantages such as low cost, low energy consumption, low complexity and hi
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