mangavalk/lcdproc
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity
Files
05ab0b71ab2887bd85a5dd49dd03d2a9637a9529
lcdproc/server/drivers/hd44780-serial.c
T

281 lines
7.8 KiB
C
Raw Blame History

/*
* Driver for serial connected hd44780 LCDs
* Copyright (C) 2006 Matteo Pillon <matteo.pillon@gmail.com>
*
* Some parts are based on the original pic-an-lcd driver code
* Copyright (C) 1997, Matthias Prinke <m.prinke@trashcan.mcnet.de>
* 1998, Richard Rognlie <rrognlie@gamerz.net>
* 1999, Ethan Dicks
* 1999-2000, Benjamin Tse <blt@Comports.com>
* 2001, Rene Wagner
* 2001-2002, Joris Robijn <joris@robijn.net>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
*/
#include "hd44780-serial.h"
#include "hd44780-low.h"
#include "report.h"
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <stdio.h>
#include <sys/types.h>
#include <fcntl.h>
#include <termios.h>
#include <errno.h>
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#define SERIAL_IF serial_interfaces[p->serial_type]
/* bitrate conversion */
unsigned int bitrate_conversion[][2] = {
{ 50, B50 },
{ 75, B75 },
{ 110, B110 },
{ 134, B134 },
{ 150, B150 },
{ 200, B200 },
{ 300, B300 },
{ 600, B600 },
{ 1200, B1200 },
{ 1800, B1800 },
{ 2400, B2400 },
{ 4800, B4800 },
{ 9600, B9600 },
{ 19200, B19200 },
{ 38400, B38400 },
{ 57600, B57600 },
{ 115200, B115200 },
{ 230400, B230400 }
#if defined(B460800)
, { 460800, B460800 }
#endif
#if defined(B500000)
, { 500000, B500000 }
#endif
#if defined(B576000)
, { 576000, B576000 }
#endif
#if defined(B921600)
, { 921600, B921600 }
#endif
#if defined(B1000000)
, { 1000000, B1000000 }
#endif
#if defined(B1152000)
, { 1152000, B1152000 }
#endif
#if defined(B1500000)
, { 1500000, B1500000 }
#endif
#if defined(B2000000)
, { 2000000, B2000000 }
#endif
#if defined(B2500000)
, { 2500000, B2500000 }
#endif
#if defined(B3000000)
, { 3000000, B3000000 }
#endif
#if defined(B3500000)
, { 3500000, B3500000 }
#endif
#if defined(B4000000)
, { 4000000, B4000000 }
#endif
};
int convert_bitrate(unsigned int conf_bitrate, size_t *bitrate) {
int counter;
for ( counter=0 ; counter<sizeof(bitrate_conversion)/(2*sizeof(unsigned int)) ; counter++ )
if (bitrate_conversion[counter][0]==conf_bitrate) {
*bitrate = (size_t) bitrate_conversion[counter][1];
return 0;
}
return 1;
}
void serial_HD44780_senddata (PrivateData *p, unsigned char displayID, unsigned char flags, unsigned char ch);
void serial_HD44780_backlight (PrivateData *p, unsigned char state);
unsigned char serial_HD44780_scankeypad (PrivateData *p);
// initialize the driver
int
hd_init_serial (Driver *drvthis)
{
PrivateData *p = (PrivateData*) drvthis->private_data;
struct termios portset;
char device[256] = DEFAULT_DEVICE;
/* READ CONFIG FILE */
/* Get interface type */
int counter;
char conf_serialif[SERIALIF_NAME_LENGTH];
strncpy(conf_serialif, drvthis->config_get_string(drvthis->name, "connectiontype", 0, ""), SERIALIF_NAME_LENGTH);
conf_serialif[SERIALIF_NAME_LENGTH-1]='\0';
p->serial_type=0;
for (counter=0; counter<(sizeof(serial_interfaces)/sizeof(SerialInterface)); counter++) {
if (strcasecmp(conf_serialif, serial_interfaces[counter].name) == 0) {
p->serial_type=counter;
break;
}
}
if (p->serial_type != counter) {
report(RPT_ERR, "HD44780: serial: serial interface %s unknown", conf_serialif);
report(RPT_ERR, "HD44780: serial: available interfaces:");
for (counter=0; counter<(sizeof(serial_interfaces)/sizeof(SerialInterface)); counter++)
report(RPT_ERR, " %s", serial_interfaces[counter].name);
return -1;
}
report (RPT_INFO,"HD44780: serial: device type: %s", SERIAL_IF.name);
/* Check if user knows the capabilities of his hardware ;-) */
if (p->have_keypad && !(SERIAL_IF.keypad)) {
report (RPT_ERR, "HD44780: serial: keypad is not supported by %s", SERIAL_IF.name);
report (RPT_ERR, "HD44780: serial: check your configuration file and disable it");
return -1;
}
if (p->have_backlight && !(SERIAL_IF.backlight)) {
report (RPT_ERR, "HD44780: serial: backlight control is not supported by %s", SERIAL_IF.name);
report (RPT_ERR, "HD44780: serial: check your configuration file and disable it");
return -1;
}
/* Get bitrate */
unsigned int conf_bitrate;
size_t bitrate;
conf_bitrate=atoi( drvthis->config_get_string(drvthis->name, "Speed", 0, "0") );
if (conf_bitrate==0)
conf_bitrate=SERIAL_IF.default_bitrate;
if (convert_bitrate(conf_bitrate, &bitrate)) {
report(RPT_ERR, "HD44780: serial: invalid configured bitrate speed");
return -1;
}
report (RPT_INFO,"HD44780: serial: using speed: %d", conf_bitrate);
/* Get serial device to use */
strncpy(device, drvthis->config_get_string(drvthis->name, "device", 0, DEFAULT_DEVICE), sizeof(device));
device[sizeof(device)-1]=0;
report (RPT_INFO,"HD44780: serial: using device: %s", device);
/* Set up io port correctly, and open it... */
p->fd = open(device, O_RDWR | O_NOCTTY | O_NDELAY);
if (p->fd == -1) {
report(RPT_ERR, "HD44780: serial: could not open device %s (%s)", device, strerror(errno));
return -1;
}
/* Get serial device parameters */
tcgetattr(p->fd, &portset);
/* We use RAW mode */
#ifdef HAVE_CFMAKERAW
/* The easy way */
cfmakeraw( &portset );
portset.c_cflag |= CLOCAL;
#else
/* The hard way */
portset.c_iflag &= ~( IGNBRK | BRKINT | PARMRK | ISTRIP
| INLCR | IGNCR | ICRNL | IXON );
portset.c_oflag &= ~OPOST;
portset.c_lflag &= ~( ECHO | ECHONL | ICANON | ISIG | IEXTEN );
portset.c_cflag &= ~( CSIZE | PARENB | CRTSCTS );
portset.c_cflag |= CS8 | CREAD | CLOCAL ;
#endif
/* Set port speed */
cfsetospeed(&portset, bitrate);
cfsetispeed(&portset, B0);
/* Set TCSANOW mode of serial device */
tcsetattr(p->fd, TCSANOW, &portset);
/* Assign functions */
p->hd44780_functions->senddata = serial_HD44780_senddata;
p->hd44780_functions->backlight = serial_HD44780_backlight;
if (p->have_keypad)
p->hd44780_functions->scankeypad = serial_HD44780_scankeypad;
/* Do initialization */
if (SERIAL_IF.if_bits == 8) {
report (RPT_INFO,"HD44780: serial: initializing with 8 bits interface");
common_init (p, IF_8BIT);
} else {
report (RPT_INFO,"HD44780: serial: initializing with 4 bits interface");
common_init (p, IF_4BIT);
}
return 0;
}
// serial_HD44780_senddata
void
serial_HD44780_senddata (PrivateData *p, unsigned char displayID, unsigned char flags, unsigned char ch)
{
/* Filter illegally sent escape characters (for interfaces without data escape) */
if (flags == RS_DATA && SERIAL_IF.data_escape==0 && ch==SERIAL_IF.instruction_escape)
ch='?';
if (flags == RS_DATA) {
/* Do we need a DATA indicator byte? */
if( SERIAL_IF.data_escape!=0 && ch<SERIAL_IF.data_escape_max ) {
write( p->fd, &SERIAL_IF.data_escape, 1 );
}
write( p->fd, &ch, 1 );
}
else {
write( p->fd, &SERIAL_IF.instruction_escape, 1 );
write( p->fd, &ch, 1 );
}
}
void
serial_HD44780_backlight (PrivateData *p, unsigned char state)
{
/* TODO */
//if (p->have_backlight) ....
}
unsigned char
serial_HD44780_scankeypad (PrivateData *p)
{
unsigned char buffer = 0;
char hangcheck = 100;
read(p->fd, &buffer, 1);
if (buffer == SERIAL_IF.keypad_escape) {
while(hangcheck>0) {
/* Check if I can read another byte */
if (read(p->fd, &buffer, 1) == 1) {
return buffer;
}
hangcheck--;
}
}
return 0;
}
Reference in New Issue View Git Blame Copy Permalink