Programming 8-bit PIC Microcontrollers in C

3.4. PIC16 C UART Serial Link

• RS232 port functions

• Simulation with virtual terminal

A basic serial link is provided by the UART. We have already seen that any pair of pins can be used for this interface, as the data rate is quite low, allowing the signals to be generated in software. However, a dedicated hardware port is provided, which must be used if an interrupt is needed. The CCS C library functions associated with this port are listed in Table 3.6

Table 3.6. RS232 Serial Port Functions

Title	Description	Example
RS232 SET BAUD RATE	Set hardware RS232 port baud rate	setup_uart(19200);
RS232 SEND BYTE	Write a character to the default port	putc(65)
RS232 SEND SELECTED	Write a character to selected port	s=fputc(“A”,01);
RS232 PRINT SERIAL	Write a mixed message ...