0,0 → 1,47 |
/* |
* Reading from and writing to an RS-232 port |
* |
* This file is part of the Mateusz' DOS Routines (MDR): http://mdr.osdn.io |
* Published under the terms of the MIT License, as stated below. |
* |
* Copyright (C) 2015-2022 Mateusz Viste |
* |
* Permission is hereby granted, free of charge, to any person obtaining a copy |
* of this software and associated documentation files (the "Software"), to |
* deal in the Software without restriction, including without limitation the |
* rights to use, copy, modify, merge, publish, distribute, sublicense, and/or |
* sell copies of the Software, and to permit persons to whom the Software is |
* furnished to do so, subject to the following conditions: |
* |
* The above copyright notice and this permission notice shall be included in |
* all copies or substantial portions of the Software. |
* |
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING |
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS |
* IN THE SOFTWARE. |
*/ |
|
#ifndef MDR_RS232_H |
#define MDR_RS232_H |
|
/* get the I/O port for COMx (1..4) */ |
unsigned short rs232_getport(int x); |
|
/* check if the COM port is ready for write. loops for some time waiting. |
* returns 0 if port seems ready eventually, non-zero otherwise. can be used |
* to verify the rs232 presence */ |
int rs232_check(unsigned short port); |
|
/* write a byte to the COM port at 'port'. this function will block if the |
* UART is not ready to transmit yet. */ |
void rs232_write(unsigned short port, int data); |
|
/* read a byte from COM port at 'port'. returns the read byte, or -1 if |
* nothing was available to read. */ |
int rs232_read(unsigned short port); |
|
#endif |