Try the RS232
ISR Timing Calculator to find the clock, prescale, RTCC increment and
ISR divider
NEW! Check this out! The
RCL-1 RS232 Level Converter
in a DB9 backshell
NEW! Why re-invent the wheel? The
RS-232 / I²C-Adapter &
Parallel I/O Module is already available.
Simple: (no interrupts)
-
UART_VP: 2400-230.4K UART This is
a simplified software module that communicates over an RS-232 port to a PC
and will echo back what is received. This is compatible with the SX Demo
Board.
Application note AN38
PDF
or CCS HTML
-
DUART_0412
Dual Universal Full Duplex UARTs for 110 to 115200 baud with Buffering,
Handshake and Auto Baud-rate Detect
-
DUART_0412_JB (uses
stdinc.src) As above but faster,
smaller, more configurable and supports the
SX52. Thanks to
Jim Brain [brain at jbrain,com] who modified
the code to
-
make autobaud detection conditional code
-
add high speed configurable UART2 back in
-
clean up code for prod SX52 support
-
add conditional code to inline uart vp code, (saves 7 cycles per uart)
-
move autobaud code to subroutines, to save space.
-
Dual
UART Dual UART in software for baud rates of 1200,2400,
4800,9600,19200,57600 bps This is compatible with the SX Demo Board.
Application note AN39
PDF
or CCS HTML
-
Eight UARTs: Eight 19.2k baud UARTs.
This software configures the Port B pins as inputs and Port C pins as outputs
for the respective UARTs (i.e., UART0=RB.0+RC.0, UART1=RB.1+RC.1, ...). This
code is not compatible with the SX Demo Board provided by Parallax, but offers
an impressive example of the power of virtual peripherals.
Application note AN40
PDF
or CCS HTML
-
UART with Parity can be configured at runtime
for: TX/RX with or without xon/xoff handshake, TX only with CTS handshake,
RX only with RTS handshake. Four selectable baudrates (default
1200,2400,9600,19200) and 7 or 8 databits with parity odd, even or none.
Also includes code for a bi-directional 2-wire interface (halfduplex serial
line + write enable line used for direction synchronization). By Peter Verkaik.
Integrations:
-
8VP: 19.2kbaud UART, two 8-bit
A/D converters, two
PWM outputs, one
I2C serial link for
EEPROMs, two 16-bit independent
timers, Time clock (keeps count in
msec), a software execution path switcher and push button detection and debounce.
SX Demo Enhanced 2.0 by Craig Webb of
Parallax Inc.
-
SXDemo: 19.2k baud UART, two
8-bit A/D converters,
two PWM outputs, one
I2C serial link for
EEPROMs, two 16-bit independent
timers, and all implemented as Virtual
Peripherals, in software. This is compatible with the SX Demo Board from
Parallax, and is the same code is shipped with the Parallax tools.
-
PowerVP: 19.2k baud 6 port UARTs
along with four PWM outputs,
four 16 bit timers, and two 8 bit
A/D converters. This
is not compatible with the SX Demo Board from Parallax, but is a very impressive
demonstration of the type of power that software can provide on the right
kind of silicon.
Also:
Calculating Parity
See also:
.
Books:
Questions:
file: /Techref/scenix/lib/io/osi2/serial/rs232_sx.htm, 9KB, , updated: 2018/4/19 18:46, local time: 2024/8/14 13:07,
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