Third attempt to reorganize tree.
This commit is contained in:
Romuald Conty
parent
507991ac2b
commit
4a5945e67d
4 changed files with 32 additions and 0 deletions
9
src/lib/buses/Makefile.am
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9
src/lib/buses/Makefile.am
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# set the include path found by configure
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INCLUDES= $(all_includes)
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noinst_HEADERS = uart.h
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noinst_LTLIBRARIES = libnfcbuses.la
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libnfcbuses_la_SOURCES = uart.c
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DISTCLEANFILES = Makefile.in
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348
src/lib/buses/uart.c
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348
src/lib/buses/uart.c
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/**
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* Public platform independent Near Field Communication (NFC) library
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*
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* Copyright (C) 2009, Roel Verdult
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*
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* This program is free software: you can redistribute it and/or modify it
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* under the terms of the GNU Lesser General Public License as published by the
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* Free Software Foundation, either version 3 of the License, or (at your
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* option) any later version.
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*
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* This program is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>
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*
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*
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* @file rs232.c
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* @brief
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*/
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/*
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Based on rs232-code written by Teunis van Beelen available:
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http://www.teuniz.net/RS-232/index.html
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*/
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#include "rs232.h"
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#include "messages.h"
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// Test if we are dealing with unix operating systems
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#ifndef _WIN32
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#include <termios.h>
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typedef struct termios term_info;
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typedef struct {
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int fd; // Serial port file descriptor
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term_info tiOld; // Terminal info before using the port
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term_info tiNew; // Terminal info during the transaction
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} serial_port_unix;
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// Set time-out on 30 miliseconds
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struct timeval tv = {
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.tv_sec = 0, // 0 second
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.tv_usec = 30000 // 30,000 micro seconds
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};
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// Work-around to claim rs232 interface using the c_iflag (software input processing) from the termios struct
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#define CCLAIMED 0x80000000
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serial_port rs232_open(const char* pcPortName)
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{
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serial_port_unix* sp = malloc(sizeof(serial_port_unix));
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if (sp == 0) return INVALID_SERIAL_PORT;
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sp->fd = open(pcPortName, O_RDWR | O_NOCTTY | O_NDELAY | O_NONBLOCK);
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if(sp->fd == -1)
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{
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rs232_close(sp);
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return INVALID_SERIAL_PORT;
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}
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if(tcgetattr(sp->fd,&sp->tiOld) == -1)
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{
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rs232_close(sp);
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return INVALID_SERIAL_PORT;
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}
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// Make sure the port is not claimed already
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if (sp->tiOld.c_iflag & CCLAIMED)
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{
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rs232_close(sp);
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return CLAIMED_SERIAL_PORT;
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}
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// Copy the old terminal info struct
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sp->tiNew = sp->tiOld;
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sp->tiNew.c_cflag = CS8 | CLOCAL | CREAD;
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sp->tiNew.c_iflag = CCLAIMED | IGNPAR;
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sp->tiNew.c_oflag = 0;
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sp->tiNew.c_lflag = 0;
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sp->tiNew.c_cc[VMIN] = 0; // block until n bytes are received
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sp->tiNew.c_cc[VTIME] = 0; // block until a timer expires (n * 100 mSec.)
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if(tcsetattr(sp->fd,TCSANOW,&sp->tiNew) == -1)
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{
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rs232_close(sp);
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return INVALID_SERIAL_PORT;
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}
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tcflush(sp->fd, TCIFLUSH);
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return sp;
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}
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void rs232_set_speed(serial_port sp, const uint32_t uiPortSpeed)
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{
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DBG("Serial port speed requested to be set to %d bauds.", uiPortSpeed);
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// Set port speed (Input and Output)
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speed_t stPortSpeed = B9600;
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switch(uiPortSpeed) {
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case 9600: stPortSpeed = B9600;
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break;
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case 19200: stPortSpeed = B19200;
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break;
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case 38400: stPortSpeed = B38400;
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break;
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case 57600: stPortSpeed = B57600;
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break;
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case 115200: stPortSpeed = B115200;
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break;
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case 230400: stPortSpeed = B230400;
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break;
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#ifdef B460800
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case 460800: stPortSpeed = B460800;
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break;
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#endif
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default:
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#ifdef B460800
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ERR("Unable to set serial port speed to %d bauds. Speed value must be one of these constants: 9600 (default), 19200, 38400, 57600, 115200, 230400 or 460800.", uiPortSpeed);
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#else
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ERR("Unable to set serial port speed to %d bauds. Speed value must be one of these constants: 9600 (default), 19200, 38400, 57600, 115200 or 230400.", uiPortSpeed);
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#endif
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};
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const serial_port_unix* spu = (serial_port_unix*)sp;
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cfsetispeed((struct termios*)&spu->tiNew, stPortSpeed);
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cfsetospeed((struct termios*)&spu->tiNew, stPortSpeed);
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if( tcsetattr(spu->fd, TCSADRAIN, &spu->tiNew) == -1)
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{
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ERR("Unable to apply new speed settings.");
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}
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}
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uint32_t rs232_get_speed(const serial_port sp)
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{
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uint32_t uiPortSpeed = 0;
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const serial_port_unix* spu = (serial_port_unix*)sp;
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switch (cfgetispeed(&spu->tiNew))
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{
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case B9600: uiPortSpeed = 9600;
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break;
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case B19200: uiPortSpeed = 19200;
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break;
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case B38400: uiPortSpeed = 38400;
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break;
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case B57600: uiPortSpeed = 57600;
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break;
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case B115200: uiPortSpeed = 115200;
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break;
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case B230400: uiPortSpeed = 230400;
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break;
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#ifdef B460800
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case B460800: uiPortSpeed = 460800;
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break;
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#endif
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}
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return uiPortSpeed;
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}
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void rs232_close(const serial_port sp)
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{
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tcsetattr(((serial_port_unix*)sp)->fd,TCSANOW,&((serial_port_unix*)sp)->tiOld);
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close(((serial_port_unix*)sp)->fd);
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free(sp);
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}
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bool rs232_cts(const serial_port sp)
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{
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char status;
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if (ioctl(((serial_port_unix*)sp)->fd,TIOCMGET,&status) < 0) return false;
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return (status & TIOCM_CTS);
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}
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bool rs232_receive(const serial_port sp, byte_t* pbtRx, size_t* pszRxLen)
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{
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int iResult;
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int byteCount;
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fd_set rfds;
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// Reset file descriptor
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FD_ZERO(&rfds);
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FD_SET(((serial_port_unix*)sp)->fd,&rfds);
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iResult = select(((serial_port_unix*)sp)->fd+1, &rfds, NULL, NULL, &tv);
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// Read error
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if (iResult < 0) {
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DBG("RX error.");
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*pszRxLen = 0;
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return false;
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}
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// Read time-out
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if (iResult == 0) {
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DBG("RX time-out.");
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*pszRxLen = 0;
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return false;
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}
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// Number of bytes in the input buffer
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ioctl(((serial_port_unix*)sp)->fd, FIONREAD, &byteCount);
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// Empty buffer
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if (byteCount == 0) {
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DBG("RX empty buffer.");
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*pszRxLen = 0;
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return false;
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}
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// There is something available, read the data
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*pszRxLen = read(((serial_port_unix*)sp)->fd,pbtRx,byteCount);
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return (*pszRxLen > 0);
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}
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bool rs232_send(const serial_port sp, const byte_t* pbtTx, const size_t szTxLen)
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{
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int iResult;
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iResult = write(((serial_port_unix*)sp)->fd,pbtTx,szTxLen);
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return (iResult >= 0);
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}
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#else
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// The windows serial port implementation
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typedef struct {
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HANDLE hPort; // Serial port handle
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DCB dcb; // Device control settings
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COMMTIMEOUTS ct; // Serial port time-out configuration
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} serial_port_windows;
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serial_port rs232_open(const char* pcPortName)
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{
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char acPortName[255];
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serial_port_windows* sp = malloc(sizeof(serial_port_windows));
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// Copy the input "com?" to "\\.\COM?" format
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sprintf(acPortName,"\\\\.\\%s",pcPortName);
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_strupr(acPortName);
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// Try to open the serial port
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sp->hPort = CreateFileA(acPortName,GENERIC_READ|GENERIC_WRITE,0,NULL,OPEN_EXISTING,0,NULL);
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if (sp->hPort == INVALID_HANDLE_VALUE)
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{
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rs232_close(sp);
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return INVALID_SERIAL_PORT;
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}
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// Prepare the device control
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memset(&sp->dcb, 0, sizeof(DCB));
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sp->dcb.DCBlength = sizeof(DCB);
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if(!BuildCommDCBA("baud=9600 data=8 parity=N stop=1",&sp->dcb))
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{
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rs232_close(sp);
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return INVALID_SERIAL_PORT;
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}
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// Update the active serial port
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if(!SetCommState(sp->hPort,&sp->dcb))
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{
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rs232_close(sp);
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return INVALID_SERIAL_PORT;
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}
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sp->ct.ReadIntervalTimeout = 0;
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sp->ct.ReadTotalTimeoutMultiplier = 0;
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sp->ct.ReadTotalTimeoutConstant = 30;
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sp->ct.WriteTotalTimeoutMultiplier = 0;
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sp->ct.WriteTotalTimeoutConstant = 30;
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if(!SetCommTimeouts(sp->hPort,&sp->ct))
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{
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rs232_close(sp);
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return INVALID_SERIAL_PORT;
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}
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PurgeComm(sp->hPort, PURGE_RXABORT | PURGE_RXCLEAR);
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return sp;
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}
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void rs232_close(const serial_port sp)
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{
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CloseHandle(((serial_port_windows*)sp)->hPort);
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free(sp);
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}
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void rs232_set_speed(serial_port sp, const uint32_t uiPortSpeed)
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{
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serial_port_windows* spw;
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DBG("Serial port speed requested to be set to %d bauds.", uiPortSpeed);
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// Set port speed (Input and Output)
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switch(uiPortSpeed) {
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case 9600:
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case 19200:
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case 38400:
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case 57600:
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case 115200:
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case 230400:
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case 460800:
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break;
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default:
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ERR("Unable to set serial port speed to %d bauds. Speed value must be one of these constants: 9600 (default), 19200, 38400, 57600, 115200, 230400 or 460800.", uiPortSpeed);
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};
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spw = (serial_port_windows*)sp;
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spw->dcb.BaudRate = uiPortSpeed;
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if (!SetCommState(spw->hPort, &spw->dcb))
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{
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ERR("Unable to apply new speed settings.");
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}
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}
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uint32_t rs232_get_speed(const serial_port sp)
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{
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const serial_port_windows* spw = (serial_port_windows*)sp;
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if (!GetCommState(spw->hPort, (serial_port)&spw->dcb))
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return spw->dcb.BaudRate;
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return 0;
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}
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bool rs232_cts(const serial_port sp)
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{
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DWORD dwStatus;
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if (!GetCommModemStatus(((serial_port_windows*)sp)->hPort,&dwStatus)) return false;
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return (dwStatus & MS_CTS_ON);
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}
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bool rs232_receive(const serial_port sp, byte_t* pbtRx, size_t* pszRxLen)
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{
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ReadFile(((serial_port_windows*)sp)->hPort,pbtRx,*pszRxLen,(LPDWORD)pszRxLen,NULL);
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return (*pszRxLen != 0);
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}
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bool rs232_send(const serial_port sp, const byte_t* pbtTx, const size_t szTxLen)
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{
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DWORD dwTxLen = 0;
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return WriteFile(((serial_port_windows*)sp)->hPort,pbtTx,szTxLen,&dwTxLen,NULL);
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return (dwTxLen != 0);
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}
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#endif
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65
src/lib/buses/uart.h
Normal file
65
src/lib/buses/uart.h
Normal file
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@ -0,0 +1,65 @@
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/**
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* Public platform independent Near Field Communication (NFC) library
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*
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* Copyright (C) 2009, Roel Verdult
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*
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* This program is free software: you can redistribute it and/or modify it
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* under the terms of the GNU Lesser General Public License as published by the
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* Free Software Foundation, either version 3 of the License, or (at your
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* option) any later version.
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*
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* This program is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
|
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* more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>
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*
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*
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* @file rs232.h
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* @brief
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*/
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#ifndef _LIBNFC_RS232_H_
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#define _LIBNFC_RS232_H_
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#include <stdio.h>
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#include <string.h>
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#include <stdlib.h>
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#include "defines.h"
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#include "types.h"
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// Handle platform specific includes
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#ifndef _WIN32
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#include <termios.h>
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#include <sys/ioctl.h>
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#include <unistd.h>
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#include <fcntl.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <limits.h>
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#include <sys/time.h>
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#else
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#include <windows.h>
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#endif
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// Define shortcut to types to make code more readable
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typedef void* serial_port;
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#define INVALID_SERIAL_PORT (void*)(~1)
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#define CLAIMED_SERIAL_PORT (void*)(~2)
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serial_port rs232_open(const char* pcPortName);
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void rs232_close(const serial_port sp);
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void rs232_set_speed(serial_port sp, const uint32_t uiPortSpeed);
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uint32_t rs232_get_speed(const serial_port sp);
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bool rs232_cts(const serial_port sp);
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bool rs232_receive(const serial_port sp, byte_t* pbtRx, size_t* pszRxLen);
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bool rs232_send(const serial_port sp, const byte_t* pbtTx, const size_t szTxLen);
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#endif // _LIBNFC_RS232_H_
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