lcd4linux.git - lcd4linux

Age	Commit message (Expand)	Author	Files	Lines
2010-11-18	Added 128x64 sample graphic	harbaum	1	-0/+0

/* $Id$ * $URL$ * * driver for picoLCD displays from mini-box.com * * Copyright (C) 2005 Michael Reinelt <michael@reinelt.co.at> * Copyright (C) 2005, 2006, 2007 The LCD4Linux Team <lcd4linux-devel@users.sourceforge.net> * * Copyright (C) 2007 Nicu Pavel, Mini-Box.com <npavel@mini-box.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_picoLCD * */ #include "config.h" #include <stdlib.h> #include <stdio.h> #include <string.h> #include <errno.h> #include <unistd.h> #include <termios.h> #include <fcntl.h> #include <sys/ioctl.h> #include <sys/time.h> #include <usb.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" #include "drv_generic_text.h" #include "drv_generic_gpio.h" #include "drv_generic_keypad.h" #define picoLCD_VENDOR 0x04d8 #define picoLCD_DEVICE 0x0002 static char Name[] = "picoLCD"; static unsigned int gpo = 0; static char *Buffer; static char *BufPtr; static usb_dev_handle *lcd; /****************************************/ /*** hardware dependant functions ***/ /****************************************/ static int drv_pL_open(void) { struct usb_bus *busses, *bus; struct usb_device *dev; char driver[1024]; char product[1024]; char manufacturer[1024]; char serialnumber[1024]; int ret; lcd = NULL; info("%s: scanning for picoLCD...", Name); usb_set_debug(0); usb_init(); usb_find_busses(); usb_find_devices(); busses = usb_get_busses(); for (bus = busses; bus; bus = bus->next) { for (dev = bus->devices; dev; dev = dev->next) { if ((dev->descriptor.idVendor == picoLCD_VENDOR) && (dev->descriptor.idProduct == picoLCD_DEVICE)) { info("%s: found picoLCD on bus %s device %s", Name, bus->dirname, dev->filename); lcd = usb_open(dev); ret = usb_get_driver_np(lcd, 0, driver, sizeof(driver)); if (ret == 0) { info("%s: interface 0 already claimed by '%s'", Name, driver); info("%s: attempting to detach driver...", Name); if (usb_detach_kernel_driver_np(lcd, 0) < 0) { error("%s: usb_detach_kernel_driver_np() failed!", Name); return -1; } } usb_set_configuration(lcd, 1); usleep(100); if (usb_claim_interface(lcd, 0) < 0) { error("%s: usb_claim_interface() failed!", Name); return -1; } usb_set_altinterface(lcd, 0); usb_get_string_simple(lcd, dev->descriptor.iProduct, product, sizeof(product)); usb_get_string_simple(lcd, dev->descriptor.iManufacturer, manufacturer, sizeof(manufacturer)); usb_get_string_simple(lcd, dev->descriptor.iSerialNumber, serialnumber, sizeof(serialnumber)); info("%s: Manufacturer='%s' Product='%s' SerialNumber='%s'", Name, manufacturer, product, serialnumber); return 0; } } } error("%s: could not find a picoLCD", Name); return -1; } static int drv_pL_close(void) { usb_release_interface(lcd, 0); usb_close(lcd); return 0; } static void drv_pL_send(unsigned char *data, int size) { usb_interrupt_write(lcd, USB_ENDPOINT_OUT + 1, (char *) data, size, 1000); } static int drv_pL_read(unsigned char *data, int size) { return usb_interrupt_read(lcd, USB_ENDPOINT_OUT + 1, (char *) data, size, 1000); } static void drv_pL_clear(void) { unsigned char cmd[1] = { 0x94 }; /* clear display */ drv_pL_send(cmd, 1); } static int drv_pL_contrast(int contrast) { unsigned char cmd[2] = { 0x92 }; /* set contrast */ if (contrast < 0) contrast = 0; if (contrast > 255) contrast = 255; cmd[1] = contrast; drv_pL_send(cmd, 2); return contrast; } static int drv_pL_backlight(int backlight) { unsigned char cmd[2] = { 0x91 }; /* set backlight */ if (backlight < 0) backlight = 0; if (backlight > 1) backlight = 1; cmd[1] = backlight; drv_pL_send(cmd, 2); return backlight; } #define _USBLCD_MAX_DATA_LEN 24 #define IN_REPORT_KEY_STATE 0x11 static int drv_pL_gpi( __attribute__ ((unused)) int num) { int ret; unsigned char read_packet[_USBLCD_MAX_DATA_LEN]; ret = drv_pL_read(read_packet, _USBLCD_MAX_DATA_LEN); if ((ret > 0) && (read_packet[0] == IN_REPORT_KEY_STATE)) { debug("picoLCD: pressed key= 0x%02x\n", read_packet[1]); return read_packet[1]; } return 0; } static int drv_pL_gpo(int num, int val) { unsigned char cmd[2] = { 0x81 }; /* set GPO */ if (num < 0) num = 0; if (num > 7) num = 7; if (val < 0) val = 0; if (val > 1) val = 1; /* set led bit to 1 or 0 */ if (val) gpo |= 1 << num; else gpo &= ~(1 << num); cmd[1] = gpo; drv_pL_send(cmd, 2); return val; } static void drv_pL_write(const int row, const int col, const char *data, int len) { unsigned char cmd[64]; int i; cmd[0] = 0x98; /* goto/write */ cmd[1] = row; cmd[2] = col; cmd[3] = len; i = 4; while (len--) { cmd[i++] = *data++; } drv_pL_send(cmd, i); } static void drv_pL_defchar(const int ascii, const unsigned char *matrix) { unsigned char cmd[10] = { 0x9c }; /* define character */ int i; cmd[1] = ascii; for (i = 0; i < 8; i++) { cmd[i + 2] = *matrix++ & 0x1f; } drv_pL_send(cmd, 10); } static int drv_pL_start(const char *section, const int quiet) { int rows = -1, cols = -1; int value; char *s; 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; if (drv_pL_open() < 0) { return -1; } /* Init the command buffer */ Buffer = (char *) malloc(1024); if (Buffer == NULL) { error("%s: command buffer could not be allocated: malloc() failed", Name); return -1; } BufPtr = Buffer; if (cfg_number(section, "Contrast", 0, 0, 255, &value) > 0) { info("Setting contrast to %d", value); drv_pL_contrast(value); } if (cfg_number(section, "Backlight", 0, 0, 1, &value) > 0) { info("Setting backlight to %d", value); drv_pL_backlight(value); } drv_pL_clear(); /* clear display */ if (!quiet) { char buffer[40]; qprintf(buffer, sizeof(buffer), "%s %dx%d", Name, DCOLS, DROWS); if (drv_generic_text_greet(buffer, "http://www.picolcd.com")) { sleep(3); drv_pL_clear(); } } return 0; } /****************************************/ /*** plugins ***/ /****************************************/ static void plugin_contrast(RESULT * result, RESULT * arg1) { double contrast; contrast = drv_pL_contrast(R2N(arg1)); SetResult(&result, R_NUMBER, &contrast); } static void plugin_backlight(RESULT * result, RESULT * arg1) { double backlight; backlight = drv_pL_backlight(R2N(arg1)); SetResult(&result, R_NUMBER, &backlight); } static void plugin_gpo(RESULT * result, RESULT * argv[]) { double gpo; gpo = drv_pL_gpo(R2N(argv[0]), R2N(argv[1])); SetResult(&result, R_NUMBER, &gpo); } /****************************************/ /*** widget callbacks ***/ /****************************************/ /* using drv_generic_text_draw(W) */ /* using drv_generic_text_icon_draw(W) */ /* using drv_generic_text_bar_draw(W) */ /****************************************/ /*** exported functions ***/ /****************************************/ /* list models */ int drv_pL_list(void) { printf("picoLCD 20x2 Text LCD"); return 0; } /* initialize driver & display */ int drv_pL_init(const char *section, const int quiet) { WIDGET_CLASS wc; int ret; info("%s: %s", Name, "$Rev$"); /* display preferences */ XRES = 5; /* pixel width of one char */ YRES = 8; /* pixel height of one char */ CHARS = 8; /* number of user-defineable characters */ CHAR0 = 0; /* ASCII of first user-defineable char */ GPOS = 8; GPIS = 1; INVALIDATE = 1; GOTO_COST = 2; /* number of bytes a goto command requires */ /* real worker functions */ drv_generic_text_real_write = drv_pL_write; drv_generic_text_real_defchar = drv_pL_defchar; drv_generic_gpio_real_set = drv_pL_gpo; drv_generic_gpio_real_get = drv_pL_gpi; /* start display */ if ((ret = drv_pL_start(section, quiet)) != 0) return ret; /* initialize generic text driver */ if ((ret = drv_generic_text_init(section, Name)) != 0) return ret; /* initialize generic icon driver */ if ((ret = drv_generic_text_icon_init()) != 0) return ret; /* initialize generic bar driver */ if ((ret = drv_generic_text_bar_init(0)) != 0) return ret; drv_generic_text_bar_add_segment(0, 0, 255, 32); /* GPO's init */ if ((ret = drv_generic_gpio_init(section, Name)) != 0) return ret; /* register text widget */ wc = Widget_Text; wc.draw = drv_generic_text_draw; widget_register(&wc); /* register icon widget */ wc = Widget_Icon; wc.draw = drv_generic_text_icon_draw; widget_register(&wc); /* register bar widget */ wc = Widget_Bar; wc.draw = drv_generic_text_bar_draw; widget_register(&wc); /* register plugins */ AddFunction("LCD::contrast", -1, plugin_contrast); AddFunction("LCD::backlight", -1, plugin_backlight); AddFunction("LCD::gpo", -1, plugin_gpo); return 0; } /* close driver & display */ int drv_pL_quit(const int quiet) { info("%s: shutting down.", Name); drv_generic_text_quit(); /* clear display */ drv_pL_clear(); /* say goodbye... */ if (!quiet) { drv_generic_text_greet("goodbye!", NULL); } drv_pL_close(); if (Buffer) { free(Buffer); Buffer = NULL; BufPtr = Buffer; } return (0); } DRIVER drv_picoLCD = { .name = Name, .list = drv_pL_list, .init = drv_pL_init, .quit = drv_pL_quit, };