S3C2440 processor UART dedicated registers

Here we only introduce the most commonly used registers related to UART. As for the registers with other functions involved in programming, they are not introduced here.

1.ULCONn(n=0,1,2) //Checksum mode register
   [6] 0=Normal mode, 1=Infrared mode
   [5:3] 0XX=No check, 100=Odd check, 101=Even check
   [2] 0=1 stop bit, 1=2 stop bits
   [1:0] 00=5-bit data length, 01=6-bit data length, 10=7-bit data length, 11=8-bit data length

2.UCONn(n=0,1,2) //Working mode register
   [10] 0=PCLK, 1=UCLK
   [9] 0=Pulse trigger, 1=Level trigger
   [8] 0=Pulse trigger, 1=Level trigger
   [7] 0=Disable receiving pause, 1=Enable receiving pause
   [6] 0=Disable receiving error interrupt, 1=Enable receiving error interrupt
   [5] 0=Disable patrol mode, 1=Enable patrol mode
   [4] 0=Disable sending interval signal, 1=Send 1 interval signal per frame
   [3:2] 00=Disable sending, 01=Interrupt or query sending mode, 1X=DMA mode
   [1:0] 00=Disable receiving, 01=Interrupt or query receiving mode, 1X=DMA mode

3.UTRSTATn(n=0,1,2) //Send and receive status register, used to determine whether sending and receiving are completed
   [2] 0=The send buffer has data, 1=The buffer has no data
   [1] 0=The send buffer has data, 1=The buffer has no data (used in FIFO and DMA mode)
   [0] 0=The receive buffer has no data, 1=The receive buffer has data

4. UTXHn and URXHn(n=0,1,2) //Registers used to store data for sending and receiving, directly used as input and output ports

5. It is recommended to use interrupt mode programming here to ensure that no data is lost when a large amount of data is transmitted.
   Dedicated pointer: pISR_UART0 //Add interrupt vector here