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