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Added RS232 library.

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Scott Duensing 2026-03-10 20:09:48 -05:00
parent 2e45e4b14d
commit ab69652a72
4 changed files with 1515 additions and 0 deletions
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0
README.md → dvx/README.md
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rs232/Makefile Normal file
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# RS-232 Serial Library Makefile for DJGPP cross-compilation
DJGPP_PREFIX = $(HOME)/djgpp/djgpp
DJGPP_LIBPATH = $(HOME)/claude/windriver/tools/lib
CC = $(DJGPP_PREFIX)/bin/i586-pc-msdosdjgpp-gcc
AR = LD_LIBRARY_PATH=$(DJGPP_LIBPATH) $(DJGPP_PREFIX)/bin/i586-pc-msdosdjgpp-ar
RANLIB = LD_LIBRARY_PATH=$(DJGPP_LIBPATH) $(DJGPP_PREFIX)/bin/i586-pc-msdosdjgpp-ranlib
CFLAGS = -O2 -Wall -Wextra -march=i486 -mtune=i586
OBJDIR = ../obj/rs232
LIBDIR = ../lib
SRCS = rs232.c
OBJS = $(patsubst %.c,$(OBJDIR)/%.o,$(SRCS))
TARGET = $(LIBDIR)/librs232.a
.PHONY: all clean
all: $(TARGET)
$(TARGET): $(OBJS) | $(LIBDIR)
$(AR) rcs $@ $(OBJS)
$(RANLIB) $@
$(OBJDIR)/%.o: %.c | $(OBJDIR)
$(CC) $(CFLAGS) -c -o $@ $<
$(OBJDIR):
mkdir -p $(OBJDIR)
$(LIBDIR):
mkdir -p $(LIBDIR)
# Dependencies
$(OBJDIR)/rs232.o: rs232.c rs232.h
clean:
rm -rf $(OBJDIR) $(TARGET)

1388
rs232/rs232.c Normal file
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rs232/rs232.h Normal file
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// RS-232 Serial Port Library for DJGPP
// Ported from DOS Serial Library 1.4 by Karl Stenerud (MIT License)
//
// ISR-driven UART communication with ring buffers and flow control.
// Supports up to 4 simultaneous COM ports with auto-detected IRQ.
#ifndef RS232_H
#define RS232_H
#include <stdint.h>
// COM Ports
#define RS232_COM1 0
#define RS232_COM2 1
#define RS232_COM3 2
#define RS232_COM4 3
// Handshaking Modes
#define RS232_HANDSHAKE_NONE 0
#define RS232_HANDSHAKE_XONXOFF 1
#define RS232_HANDSHAKE_RTSCTS 2
#define RS232_HANDSHAKE_DTRDSR 3
// Error Codes
#define RS232_SUCCESS 0
#define RS232_ERR_UNKNOWN -1
#define RS232_ERR_NOT_OPEN -2
#define RS232_ERR_ALREADY_OPEN -3
#define RS232_ERR_NO_UART -4
#define RS232_ERR_INVALID_PORT -5
#define RS232_ERR_INVALID_BASE -6
#define RS232_ERR_INVALID_IRQ -7
#define RS232_ERR_INVALID_BPS -8
#define RS232_ERR_INVALID_DATA -9
#define RS232_ERR_INVALID_PARITY -10
#define RS232_ERR_INVALID_STOP -11
#define RS232_ERR_INVALID_HANDSHAKE -12
#define RS232_ERR_INVALID_FIFO -13
#define RS232_ERR_NULL_PTR -14
#define RS232_ERR_IRQ_NOT_FOUND -15
#define RS232_ERR_LOCK_MEM -16
// Buffer management
int rs232ClearRxBuffer(int com);
int rs232ClearTxBuffer(int com);
// Open/close
int rs232Close(int com);
int rs232Open(int com, int32_t bps, int dataBits, char parity, int stopBits, int handshake);
// Getters
int rs232GetBase(int com);
int32_t rs232GetBps(int com);
int rs232GetCts(int com);
int rs232GetData(int com);
int rs232GetDsr(int com);
int rs232GetDtr(int com);
int rs232GetHandshake(int com);
int rs232GetIrq(int com);
int rs232GetLsr(int com);
int rs232GetMcr(int com);
int rs232GetMsr(int com);
char rs232GetParity(int com);
int rs232GetRts(int com);
int rs232GetRxBuffered(int com);
int rs232GetStop(int com);
int rs232GetTxBuffered(int com);
// Read/write
int rs232Read(int com, char *data, int len);
int rs232Write(int com, const char *data, int len);
int rs232WriteBuf(int com, const char *data, int len);
// Setters
int rs232Set(int com, int32_t bps, int dataBits, char parity, int stopBits, int handshake);
int rs232SetBase(int com, int base);
int rs232SetBps(int com, int32_t bps);
int rs232SetData(int com, int dataBits);
int rs232SetDtr(int com, int dtr);
int rs232SetFifoThreshold(int com, int threshold);
int rs232SetHandshake(int com, int handshake);
int rs232SetIrq(int com, int irq);
int rs232SetMcr(int com, int mcr);
int rs232SetParity(int com, char parity);
int rs232SetRts(int com, int rts);
int rs232SetStop(int com, int stopBits);
#endif