diff options
Diffstat (limited to 'drv_EFN.c')
| -rw-r--r-- | drv_EFN.c | 414 |
1 files changed, 414 insertions, 0 deletions
diff --git a/drv_EFN.c b/drv_EFN.c new file mode 100644 index 0000000..dca226c --- /dev/null +++ b/drv_EFN.c @@ -0,0 +1,414 @@ +/* $Id: drv_Sample.c 773 2007-02-25 12:39:09Z michael $ + * $URL: https://ssl.bulix.org/svn/lcd4linux/branches/0.10.1/drv_Sample.c $ + * + * lcd4linux driver for EFN LED modules (manufacturer: COMFILE/South Korea) + * connected to the ethernet to serial converter EUG 100 (manufacturer ELV/ + * Germany) + * + * Up to 256 EFN LED modules listen on a serial bus (9600 BAUD, 1 stop bit, + * no parity) and are controlled by a 3 byte protocol: + * Byte 1: 0xff + * Byte 2: <module address> + * Byte 3: <Ascii value of character to be diplayed> + * The module address of each EFN LED module is set hy solder bridges. + * The driver expects the EFN LED modules to be configured starting + * from address 1. The EFN LED module set to address 1 is the right + * most module. + * + * The EUG 100 is an ethernet to seriell converter. The IP address + * can be set by dhcp. It listens on ports 1000 (data) and 1001 + * (configuration). Data received on port 1000 is sent onto the serial bus, + * while data sent to configuration port sets format of the EUG 100's + * serial interface. + * Due to a bug in the firmware, the transmission is interrupted if '\0' (0x00) + * is received on port 1000. Consequently, none of the EFN LED modules shall + * be set to address 0. + * + * Copyright (C) 2010 Tilman Glötzner <tilmanglotzner@hotmail.com> + * + * This file is part of LCD4Linux. + * + * LCD4Linux 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, or (at your option) + * any later version. + * + * LCD4Linux 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., 675 Mass Ave, Cambridge, MA 02139, USA. + * + */ + +/* + * + * exported fuctions: + * + * struct DRIVER drv_EFN + * + */ + +#include "config.h" + +#include <stdlib.h> +#include <stdio.h> +#include <strings.h> +#include <unistd.h> +#include <string.h> +#include <errno.h> +#include <sys/types.h> +#include <sys/socket.h> +#include <netinet/in.h> +#include <netdb.h> + +#include "debug.h" +#include "cfg.h" +#include "qprintf.h" +#include "udelay.h" +#include "plugin.h" +#include "widget.h" +#include "widget_text.h" +#include "widget_icon.h" +#include "widget_bar.h" +#include "drv.h" + +/* text mode display */ +#include "drv_generic_text.h" + + + +static char Name[] = "EFN"; + +char Host[256]; +int Port; +int DataSocket; + +static void drv_EFN_clear(void); + +/****************************************/ +/*** hardware dependant functions ***/ +/****************************************/ + +static int drv_EFN_open(const char *section) +{ + int sockfd_conf, portno_conf, n; + struct sockaddr_in serv_addr; + struct sockaddr_in conf_addr; + struct hostent *server; + char buffer[5]; + + /* open tcp sockets to config port to EUG 100 t0 set serial parameter */ + /* 9600 BAUD; no parity; 1 stop bit */ + // socket to config EUG + portno_conf = Port + 1; + sockfd_conf = socket(AF_INET, SOCK_STREAM, 0); + if (sockfd_conf < 0) { + error("ERROR opening config socket"); + return -1; + } + // resolve DNS name of EFN server (= EUG 100) + server = gethostbyname(Host); + if (server == NULL) { + error("ERROR, no such host\n"); + return -1; + } + // socket addr for config socket + bzero((char *) &conf_addr, sizeof(struct sockaddr_in)); + conf_addr.sin_family = AF_INET; + bcopy((char *) server->h_addr, (char *) &conf_addr.sin_addr.s_addr, server->h_length); + conf_addr.sin_port = htons(portno_conf); + + // open config socket + if (connect(sockfd_conf, (struct sockaddr *) &conf_addr, sizeof(struct sockaddr_in)) < 0) { + error("ERROR connecting to config port"); + return -1; + } + // sent config message + + bzero(buffer, 5); + buffer[0] = '4'; + buffer[1] = '0'; + buffer[2] = '1'; + + + n = write(sockfd_conf, buffer, 3); + if (n < 0) { + error("ERROR writing to config socket"); + close(sockfd_conf); + return -1; + } + close(sockfd_conf); + + // open data socket + + DataSocket = socket(AF_INET, SOCK_STREAM, 0); + if (DataSocket < 0) { + error("ERROR opening data socket"); + return -1; + } + // socket addr for data socket + bzero((char *) &serv_addr, sizeof(struct sockaddr_in)); + serv_addr.sin_family = AF_INET; + bcopy((char *) server->h_addr, (char *) &serv_addr.sin_addr.s_addr, server->h_length); + serv_addr.sin_port = htons(Port); + + if (connect(DataSocket, (struct sockaddr *) &serv_addr, sizeof(struct sockaddr_in)) < 0) { + error("ERROR connecting to data socket"); + return -1; + } + return 0; +} + + +static int drv_EFN_close(void) +{ + /* close whatever port you've opened */ + drv_EFN_clear(); + close(DataSocket); + return 0; +} + + +/* dummy function that sends something to the display */ +static void drv_EFN_send(const char *data, const unsigned int len) +{ + int n, i; + + // transport command stirng to EUG 100 + n = write(DataSocket, data, len); + + if (n < 0) { + error("%s:drv_EFN_send: Failed to write to data socket\n", Name); + // return(-1); + } + /* + printf("EFN_send: "); + for(i=0;i<n;i++) + { + printf("0x%02x ",data[i]); + } + printf("\n"); + */ +} + + +/* text mode displays only */ +static void drv_EFN_clear(void) +{ + char *cmd; + int max_char, max_cmd, k; + + max_char = DROWS * DCOLS; + max_cmd = 3 * max_char; // each EFN module expects 3 bytes + + if ((cmd = malloc(max_cmd)) == NULL) { + error("%s : Failed to allocate memory in drv_Sample_write\n", Name); + // return -1; + } else { + /* do whatever is necessary to clear the display */ + for (k = 0; k < max_char; k++) { + cmd[(3 * k) + 0] = 0xff; + cmd[(3 * k) + 1] = k + 1; + cmd[(3 * k) + 2] = ' '; + } + drv_EFN_send(cmd, max_cmd); + drv_EFN_send(cmd, max_cmd); + free(cmd); + //return 0; + } +} + + +/* text mode displays only */ +static void drv_EFN_write(const int row, const int col, const char *data, int len) +{ + char *cmd; + int offset, i, k, max_char, max_cmd; + + max_char = DROWS * DCOLS; + max_cmd = 3 * max_char; // each LED blocks expects a 3 byte sequence + + + if ((cmd = (char *) malloc(max_cmd)) == NULL) { + error("%s : Failed to allocate memory in drv_Sample_write\n", Name); + //return -1; + } else { + /* do the cursor positioning here */ + + offset = ((row) * DCOLS) + col; + + for (i = max_char - offset, k = 0; ((i > 0) && (k < len)); i--, k++) { + cmd[(3 * k) + 0] = 0xff; + cmd[(3 * k) + 1] = i; + cmd[(3 * k) + 2] = data[k]; + } + + /* send string to the display twice (to make transmission + * reliable) */ + drv_EFN_send(cmd, 3 * (k)); + drv_EFN_send(cmd, 3 * (k)); + + free(cmd); + // return 0; + } +} + +static void drv_EFN_defchar(const int ascii, const unsigned char *matrix) +{ + error("%s:drv_EFN_defchar: Function not supported by EFN modules\n", Name); +} + +/* start text mode display */ +static int drv_EFN_start(const char *section) +{ + int rows = -1, cols = -1; + char *s; + + s = cfg_get(section, "Host", NULL); + + if (s == NULL || *s == '\0') { + error("%s: no '%s.Host' entry from %s", Name, section, cfg_source()); + return -1; + } + + if (sscanf(s, "%s", &Host) != 1) { + error("%s: bad %s.Size '%s' from %s", Name, section, s, cfg_source()); + free(s); + return -1; + } + + if (cfg_number(section, "Port", 1000, 0, 65535, &Port) < 0) + return -1; + + + s = cfg_get(section, "Size", NULL); + if (s == NULL || *s == '\0') { + error("%s: no '%s.Size' entry from %s", Name, section, cfg_source()); + return -1; + } + if (sscanf(s, "%dx%d", &cols, &rows) != 2 || rows < 1 || cols < 1) { + error("%s: bad %s.Size '%s' from %s", Name, section, s, cfg_source()); + free(s); + return -1; + } + + DROWS = rows; + DCOLS = cols; + + /* open communication with the display */ + if (drv_EFN_open(section) < 0) { + return -1; + } + + /* initialize display */ + drv_EFN_clear(); /* clear display */ + + return 0; +} + + + +/****************************************/ +/*** plugins ***/ +/****************************************/ + + +/****************************************/ +/*** widget callbacks ***/ +/****************************************/ + + + + +/****************************************/ +/*** exported functions ***/ +/****************************************/ + + +/* list models */ +int drv_EFN_list(void) +{ + printf("EFN LED modules + EUG100 Ethernet to serial convertor"); + return 0; +} + + +/* initialize driver & display */ +/* use this function for a text display */ +int drv_EFN_init(const char *section, const int quiet) +{ + WIDGET_CLASS wc; + int ret; + + info("%s: %s", Name, "$Rev: 773 $"); + + /* display preferences */ + + /* real worker functions */ + drv_generic_text_real_write = drv_EFN_write; + drv_generic_text_real_defchar = drv_EFN_defchar; + + + /* start display */ + if ((ret = drv_EFN_start(section)) != 0) + return ret; + + if (!quiet) { + char buffer[40]; + qprintf(buffer, sizeof(buffer), "%s %dx%d", Name, DCOLS, DROWS); + sleep(3); + drv_EFN_clear(); + + } + + /* initialize generic text driver */ + if ((ret = drv_generic_text_init(section, Name)) != 0) + return ret; + + + /* register text widget */ + wc = Widget_Text; + wc.draw = drv_generic_text_draw; + widget_register(&wc); + + return 0; +} + + + + +/* close driver & display */ +/* use this function for a text display */ +int drv_EFN_quit(const int quiet) +{ + + info("%s: shutting down.", Name); + + drv_generic_text_quit(); + + /* clear display */ + drv_EFN_clear(); + + /* say goodbye... */ + if (!quiet) { + drv_generic_text_greet("goodbye!", NULL); + } + + debug("closing connection"); + drv_EFN_close(); + + return (0); +} + +/* close driver & display */ +/* use this one for a text display */ +DRIVER drv_EFN = { + .name = Name, + .list = drv_EFN_list, + .init = drv_EFN_init, + .quit = drv_EFN_quit, +}; |