For Silicon Laboratories, Inc. C8051F412 — Serial UART 0 (Enhanced Interface)
Simulation support for this peripheral or feature is comprised of:
- Dialog boxes which display and allow you to change peripheral configuration.
- VTREGs (Virtual Target Registers) which support I/O with the peripheral.
These simulation capabilities are described below.
Serial Channel 0 Dialog
The Serial Channel dialog displays and allows you to edit the
configuration of the Serial Interface.
Mode displays and allows you to change the serial
interface mode of operation (data bit length and baud rate).
SCON0 (Serial Control Register 0) holds the control and
setup information for programming the serial port.
SBUF0 (Serial Interface Buffer Register 0) contains the
transmit data to be sent or received data.
MCE0 (Multiprocessor Communication Enable) activates the
RI0 based on either the stop bit or the 9th bit, depending Mode
TB80 (Serial Port Transmitter Bit 9) is the 9th data bit
to be transmitted for serial modes 2 and 3.
RB80 (Serial Port Receiver Bit 9) is set for serial
modes 2 and 3 when a 9th bit is received. In serial mode 1, this is
the stop bit.
REN0 (Receiver Enable) is set to enable serial data
Transmit & Receive Baudrate is the actual baudrate
for the serial channel. It can be derived from the oscillator
frequency, or generated by Timer 1.
TI0 (Transmitter Interrupt Flag) is set by hardware for
each character frame transmitted. TI0 is cleared by software.
RI0 (Receiver Interrupt Flag) is set by hardware for
each character frame received. RI0 is cleared by software.
Data Type: unsigned char
The SxTIME VTREG allows you to control the timing of the simulated
serial port 0, 1, and so on.
A value of 1 (which is the default) indicates that the serial
port timing is identical to the target hardware. Use this value
when you want to see the effects of baud rate on the serial port
A value of 0 indicates that all serial input and output occur
instantaneously. Use this value when you don't care about any baud
rate effects or when you want serial output to be fast.
S0TIME = 0 /* Set Serial Port 0 for FAST timing */
S0TIME = 1 /* Set Serial Port 0 for accurate timing */