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-rw-r--r--drv_picoLCD.c492
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diff --git a/drv_picoLCD.c b/drv_picoLCD.c
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+/* $Id: drv_picoLCD.c 1143 2011-02-12 22:46:19Z mzuther $
+ * $URL: https://ssl.bulix.org/svn/lcd4linux/trunk/drv_picoLCD.c $
+ *
+ * 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: 1143 $");
+
+ /* 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,
+};
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