![]() dev/ttyS0、 /dev/ttySAC0、 /dev/tty、 /dev/tty0、 /dev/tty1、 /dev/console The difference between Wei Dongshan's document, Here are just some paste records ▲ Serial port structure diagram 2、 TTY Differences of equipment nodes in the system Receive data : UART Company > Receive shifter > FIFO > Memory > CPU An interrupt reminder is generated after receiving CPU Transmission complete Send data : CPU > Memory > FIFO > Transmit shifter > UART Company An interrupt reminder will be generated after sending CPU Transmission complete Video tutorial address : 1、ARM How the chip uses the serial port to send / Receiving data Wei Dongshan's documents, There are also some personal supplementary contents according to their own needs Most of the content in the article comes from Mr. Weidongshan embedded Linux Application Development Basics learning notes 5.1、 Blocking and non blocking modes of serial port.5、 A serial port AT Instruction reading and writing experiment. ![]()
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