| 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 |