/*
* Base driver module for Hitachi HD44780 based LCD displays. This is
* a modular driver that readily allows support for alternative HD44780
* designs to be added in a flexible and maintainable manner.
*
* This driver also supports the aggregation of multiple displays to form
* a single virtual display. e.g., Four 16x2 displays can be combined
* to form a 16x8 display.
*
* To add support for additional HD44780 connections:
* 1. Add a connection type and mapping to hd44780-drivers.h
* 2. Call your initialisation roUine
* 3. Create the low-level driver (use hd44780-ext8bit.c as a starting point)
* 4. Modify the makefile
*
* Modular driver created and generic support for multiple displays added
* Dec 1999, Benjamin Tse <blt@Comports.com>
*
* Modified July 2000 by Charles Steinkuehler to use one of 3 methods for delay
* timing. I/O reads, gettimeofday, and nanosleep. Of the three, nanosleep
* seems to work best, so that's what is set by default.
*
* Modified May 2001 by Joris Robijn to add Keypad support.
*
* Character mapping for correct display of some special ASCII chars added
* Sep 2001, Mark Haemmerling <mail@markh.de>.
*
* Modified October 2001 to read the configfile.
*
* Modified August 2006 by Pillon Matteo <matteo.pillon@email.it> to
* allow user selecting charmaps
*
* Moved the delay timing code by Charles Steinkuehler to timing.h.
* Guillaume Filion <gfk@logidac.com>, December 2001
*
* This file is released under the GNU General Public License. Refer to the
* COPYING file distributed with this package.
*
* Copyright (c) 2000, 1999, 1995 Benjamin Tse <blt@Comports.com>
* 2001 Joris Robijn <joris@robijn.net>
* 2001 Mark Haemmerling <mail@markh.de>
* 2000 Charles Steinkuehler <cstein@newtek.com>
* 1999 Andrew McMeikan <andrewm@engineer.com>
* 1998 Richard Rognlie <rrognlie@gamerz.net>
* 1997 Matthias Prinke <m.prinke@trashcan.mcnet.de>
*/
// Uncomment one of the lines below to select your desired delay generation
// mechanism. If both defines are commented, the original I/O read timing
// loop is used. Using DELAY_NANOSLEEP seems to provide the best performance.
//#define DELAY_GETTIMEOFDAY
#define DELAY_NANOSLEEP
//#define DELAY_IOCALLS
// Default parallel port address
#define LPTPORT 0x378
// Autorepeat values
#define KEYPAD_AUTOREPEAT_DELAY 500
#define KEYPAD_AUTOREPEAT_FREQ 15
#include <stdlib.h>
#include <stdio.h>
#include <unistd.h>
#include <fcntl.h>
#include <string.h>
#include <errno.h>
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include "lcd.h"
#include "lcd_lib.h"
#include "hd44780.h"
#include "report.h"
#include "adv_bignum.h"
#include "timing.h"
#include "hd44780-low.h"
#include "hd44780-drivers.h"
#include "hd44780-charmap.h"
// Only one alternate delay method at a time, please ;-)
#if defined DELAY_GETTIMEOFDAY
# undef DELAY_NANOSLEEP
#elif defined DELAY_NANOSLEEP
# include <sched.h>
# include <time.h>
#endif
static char *defaultKeyMapDirect[KEYPAD_MAXX] = { "A", "B", "C", "D", "E" };
static char *defaultKeyMapMatrix[KEYPAD_MAXY][KEYPAD_MAXX] = {
{ "1", "2", "3", "A", "E" },
{ "4", "5", "6", "B", "F" },
{ "7", "8", "9", "C", "G" },
{ "*", "0", "#", "D", "H" },
{ NULL, NULL, NULL, NULL, NULL },
{ NULL, NULL, NULL, NULL, NULL },
{ NULL, NULL, NULL, NULL, NULL },
{ NULL, NULL, NULL, NULL, NULL },
{ NULL, NULL, NULL, NULL, NULL },
{ NULL, NULL, NULL, NULL, NULL },
{ NULL, NULL, NULL, NULL, NULL }};
// function declarations
void HD44780_position(Driver *drvthis, int x, int y);
static void uPause(PrivateData *p, int usecs);
unsigned char HD44780_scankeypad(PrivateData *p);
static int parse_span_list(int *spanListArray[], int *spLsize, int *dispOffsets[], int *dOffsize, int *dispSizeArray[], const char *spanlist);
// Vars for the server core
MODULE_EXPORT char * api_version = API_VERSION;
MODULE_EXPORT int stay_in_foreground = 0;
MODULE_EXPORT int supports_multiple = 1; // yes, we have no global variables (except for constants)
MODULE_EXPORT char *symbol_prefix = "HD44780_";
#define IF_TYPE_PARPORT 0
#define IF_TYPE_USB 1
#define IF_TYPE_SERIAL 2
/////////////////////////////////////////////////////////////////
// Opens com port and sets baud correctly...
//
MODULE_EXPORT int
HD44780_init(Driver *drvthis)
{
// TODO: remove the two magic numbers below
// TODO: single point of return
char buf[40];
const char *s;
int i;
int if_type = IF_TYPE_PARPORT;
PrivateData *p;
// Alocate and store private data
p = (PrivateData *) calloc(1, sizeof(PrivateData));
if (p == NULL)
return -1;
if (drvthis->store_private_ptr(drvthis, p))
return -1;
// initialize private data
p->cellheight = 8; /* Do not change this !!! This is a controller property, not a display property !!! */
p->cellwidth = 5;
p->ccmode = standard;
//// READ THE CONFIG FILE
p->port = drvthis->config_get_int(drvthis->name, "port", 0, LPTPORT);
p->ext_mode = drvthis->config_get_bool(drvthis->name, "extendedmode", 0, 0);
p->have_keypad = drvthis->config_get_bool(drvthis->name, "keypad", 0, 0);
p->have_backlight = drvthis->config_get_bool(drvthis->name, "backlight", 0, 0);
p->have_output = drvthis->config_get_bool(drvthis->name, "outputport", 0, 0);
p->delayMult = drvthis->config_get_int(drvthis->name, "delaymult", 0, 1);
p->delayBus = drvthis->config_get_bool(drvthis->name, "delaybus", 0, 1);
p->lastline = drvthis->config_get_bool(drvthis->name, "lastline", 0, 1);
p->nextrefresh = 0;
p->refreshdisplay = drvthis->config_get_int(drvthis->name, "refreshdisplay", 0, 0);
p->nextkeepalive = 0;
p->keepalivedisplay = drvthis->config_get_int(drvthis->name, "keepalivedisplay", 0, 0);
// Get and search for the connection type
s = drvthis->config_get_string(drvthis->name, "ConnectionType", 0, "4bit");
for (i = 0; connectionMapping[i].name != NULL && strcmp(s, connectionMapping[i].name) != 0; i++);
if (connectionMapping[i].name == NULL) {
report(RPT_ERR, "%s: unknown ConnectionType: %s", drvthis->name, s);
return -1; // fatal error
} else {
p->connectiontype_index = i;
/* check if ConnectionType contains the string "usb" or "USB" */
if ((strstr(connectionMapping[p->connectiontype_index].name, "usb") != NULL) ||
(strstr(connectionMapping[p->connectiontype_index].name, "USB") != NULL))
if_type = IF_TYPE_USB;
/* check if it is the serial driver */
for (i = 0; i < (sizeof(serial_interfaces)/sizeof(SerialInterface)); i++) {
if (strcasecmp(connectionMapping[p->connectiontype_index].name,
serial_interfaces[i].name)==0)
if_type = IF_TYPE_SERIAL;
}
}
// Get and parse vspan only when specified
s = drvthis->config_get_string(drvthis->name, "vspan", 0, "");
if (s[0] != 0) {
if (parse_span_list(&(p->spanList), &(p->numLines), &(p->dispVOffset), &(p->numDisplays), &(p->dispSizes), s) == -1) {
report(RPT_ERR, "%s: invalid vspan value: %s", drvthis->name, s);
return -1;
}
}
// Get and parse size
s = drvthis->config_get_string(drvthis->name, "size", 0, "20x4");
if (sscanf(s, "%dx%d", &(p->width), &(p->height)) != 2
|| (p->width <= 0) || (p->width > LCD_MAX_WIDTH)
|| (p->height <= 0) || (p->height > LCD_MAX_HEIGHT)) {
report(RPT_ERR, "%s: cannot read Size %s", drvthis->name, s);
}
// default case for when spans aren't indicated
if (p->numLines == 0) {
if ((p->spanList = (int *) calloc(sizeof(int), p->height)) != NULL) {
int i;
for (i = 0; i < p->height; ++i) {
p->spanList[i] = 1;
p->numLines = p->height;
}
} else
report(RPT_ERR, "%s: error allocing", drvthis->name);
}
else {
// sanity check against p->height
if (p->numLines != p->height)
report(RPT_ERR, "%s: height in Size does not match vSpan", drvthis->name);
}
if (p->numDisplays == 0) {
if (((p->dispVOffset = (int *) calloc(1, sizeof(int))) != NULL) &&
((p->dispSizes = (int *) calloc(1, sizeof(int))) != NULL)) {
p->dispVOffset[0] = 0;
p->dispSizes[0] = p->height;
p->numDisplays = 1;
} else
report(RPT_ERR, "%s: error mallocing", drvthis->name);
}
if (timing_init() == -1) {
report(RPT_ERR, "%s: timing_init() failed (%s)", drvthis->name, strerror(errno));
return -1;
}
#if defined DELAY_NANOSLEEP
// Change to Round-Robin scheduling for nanosleep
{
// Set priority to 1
struct sched_param param;
param.sched_priority = 1;
if ((sched_setscheduler(0, SCHED_RR, ¶m)) == -1) {
report(RPT_ERR, "%s: sched_setscheduler() failed (%s)",
drvthis->name, strerror(errno));
return -1;
}
}
#endif
// Allocate framebuffer
p->framebuf = (char *) calloc(p->width * p->height, sizeof(char));
if (p->framebuf == NULL) {
report(RPT_ERR, "%s: unable to allocate framebuffer", drvthis->name);
//HD44780_close();
return -1;
}
// Allocate and clear the buffer for incremental updates
p->lcd_contents = (char *) calloc(p->width * p->height, sizeof(char));
if (p->lcd_contents == NULL) {
report(RPT_ERR, "%s: unable to allocate framebuffer backing store", drvthis->name);
return -1;
}
// Keypad ?
if (p->have_keypad) {
int x, y;
// Read keymap
for (x = 0; x < KEYPAD_MAXX; x++) {
char buf[40];
// First fill with default value
p->keyMapDirect[x] = defaultKeyMapDirect[x];
// Read config value
sprintf(buf, "keydirect_%1d", x+1);
s = drvthis->config_get_string(drvthis->name, buf, 0, NULL);
// Was a key specified in the config file ?
if (s) {
p->keyMapDirect[x] = strdup(s);
report(RPT_INFO, "HD44780: Direct key %d: \"%s\"", x, s);
}
}
for (x = 0; x < KEYPAD_MAXX; x++) {
for (y = 0; y<KEYPAD_MAXY; y++) {
char buf[40];
// First fill with default value
p->keyMapMatrix[y][x] = defaultKeyMapMatrix[y][x];
// Read config value
sprintf(buf, "keymatrix_%1d_%d", x+1, y+1);
s = drvthis->config_get_string(drvthis->name, buf, 0, NULL);
// Was a key specified in the config file ?
if (s) {
p->keyMapMatrix[y][x] = strdup(s);
report(RPT_INFO, "HD44780: Matrix key %d %d: \"%s\"", x, y, s);
}
}
}
}
// Get configured charmap
char conf_charmap[MAX_CHARMAP_NAME_LENGHT];
strncpy(conf_charmap, drvthis->config_get_string(drvthis->name, "charmap", 0, "hd44780_default"), MAX_CHARMAP_NAME_LENGHT);
conf_charmap[MAX_CHARMAP_NAME_LENGHT-1]='\0';
p->charmap=0;
for (i=0; i<(sizeof(available_charmaps)/sizeof(struct charmap)); i++) {
if (strcasecmp(conf_charmap, available_charmaps[i].name) == 0) {
p->charmap=i;
break;
}
}
if (p->charmap != i) {
report(RPT_ERR, "%s: Charmap %s is unknown", drvthis->name, conf_charmap);
report(RPT_ERR, "%s: Available charmaps:", drvthis->name);
for (i=0; i<(sizeof(available_charmaps)/sizeof(struct charmap)); i++) {
report(RPT_ERR, " %s", available_charmaps[i].name);
}
return -1;
}
report(RPT_INFO, "%s: Using %s charmap", drvthis->name, available_charmaps[p->charmap].name);
// Output latch state - init to a non-valid value
p->output_state = 999999;
if ((p->hd44780_functions = (HD44780_functions *) calloc(1, sizeof(HD44780_functions))) == NULL) {
report(RPT_ERR, "%s: error mallocing", drvthis->name);
return -1;
}
p->hd44780_functions->uPause = uPause;
p->hd44780_functions->scankeypad = HD44780_scankeypad;
p->hd44780_functions->output = NULL;
p->hd44780_functions->close = NULL;
// Do connection type specific display init
if (connectionMapping[p->connectiontype_index].init_fn(drvthis) != 0)
return -1;
// Display startup parameters on the LCD
HD44780_clear(drvthis);
sprintf(buf, "HD44780 %dx%d", p->width, p->height);
HD44780_string(drvthis, 1, 1, buf);
switch(if_type) {
case IF_TYPE_USB:
sprintf(buf, "USB %s%s%s",
(p->have_backlight?" bl":""),
(p->have_keypad?" key":""),
(p->have_output?" out":"")
);
break;
case IF_TYPE_SERIAL:
sprintf(buf, "SERIAL %s%s%s",
(p->have_backlight?" bl":""),
(p->have_keypad?" key":""),
(p->have_output?" out":"")
);
break;
default:
sprintf(buf, "LPT 0x%x%s%s%s", p->port,
(p->have_backlight?" bl":""),
(p->have_keypad?" key":""),
(p->have_output?" out":"")
);
}
HD44780_string(drvthis, 1, 2, buf);
HD44780_flush(drvthis);
sleep(2);
return 1;
}
/////////////////////////////////////////////////////////////////
// Common initialisation sequence - sets cursor off and not blinking,
// clear display and homecursor
// Does not set twoline mode nor small characters (5x8). The init function of
// the connectiontype should do this.
//
void
common_init(PrivateData *p, unsigned char if_bit)
{
if (p->ext_mode) {
// Set up extended mode */
p->hd44780_functions->senddata(p, 0, RS_INSTR, FUNCSET | if_bit | TWOLINE | SMALLCHAR | EXTREG);
p->hd44780_functions->uPause(p, 40);
p->hd44780_functions->senddata(p, 0, RS_INSTR, EXTMODESET | FOURLINE);
p->hd44780_functions->uPause(p, 40);
}
p->hd44780_functions->senddata(p, 0, RS_INSTR, FUNCSET | if_bit | TWOLINE | SMALLCHAR);
p->hd44780_functions->uPause(p, 40);
p->hd44780_functions->senddata(p, 0, RS_INSTR, ONOFFCTRL | DISPON | CURSOROFF | CURSORNOBLINK);
p->hd44780_functions->uPause(p, 40);
p->hd44780_functions->senddata(p, 0, RS_INSTR, CLEAR);
p->hd44780_functions->uPause(p, 1600);
p->hd44780_functions->senddata(p, 0, RS_INSTR, HOMECURSOR);
p->hd44780_functions->uPause(p, 1600);
}
/////////////////////////////////////////////////////////////////
// Delay a number of microseconds
//
void
uPause(PrivateData *p, int usecs)
{
timing_uPause(usecs * p->delayMult);
}
/////////////////////////////////////////////////////////////////
// Clean-up
//
MODULE_EXPORT void
HD44780_close(Driver *drvthis)
{
PrivateData *p = (PrivateData *) drvthis->private_data;
if (p->hd44780_functions->close)
p->hd44780_functions->close(p);
if (p != NULL) {
if (p->framebuf)
free(p->framebuf);
if (p->lcd_contents)
free(p->lcd_contents);
free(p);
}
drvthis->store_private_ptr(drvthis, NULL);
}
/////////////////////////////////////////////////////////////////
// Returns the display width
//
MODULE_EXPORT int
HD44780_width(Driver *drvthis)
{
PrivateData *p = (PrivateData *) drvthis->private_data;
return p->width;
}
/////////////////////////////////////////////////////////////////
// Returns the display height
//
MODULE_EXPORT int
HD44780_height(Driver *drvthis)
{
PrivateData *p = (PrivateData *) drvthis->private_data;
return p->height;
}
/////////////////////////////////////////////////////////////////
// Returns the display's character cell width
//
MODULE_EXPORT int
HD44780_cellwidth(Driver *drvthis)
{
PrivateData *p = (PrivateData *) drvthis->private_data;
return p->cellwidth;
}
/////////////////////////////////////////////////////////////////
// Returns the display's character cell height
//
MODULE_EXPORT int
HD44780_cellheight(Driver *drvthis)
{
PrivateData *p = (PrivateData *) drvthis->private_data;
return p->cellheight;
}
/////////////////////////////////////////////////////////////////
// Set position (not part of API)
//
// x and y here are for the virtual p->height x p->width display
void
HD44780_position(Driver *drvthis, int x, int y)
{
PrivateData *p = (PrivateData *) drvthis->private_data;
int dispID = p->spanList[y];
int relY = y - p->dispVOffset[dispID - 1];
int DDaddr;
if (p->ext_mode) {
// Linear addressing, each line starts 0x20 higher.
DDaddr = x + relY * 0x20;
} else {
// 16x1 is a special case
if (p->dispSizes[dispID - 1] == 1 && p->width == 16) {
if (x >= 8) {
x -= 8;
relY = 1;
}
}
DDaddr = x + (relY % 2) * 0x40;
if ((relY % 4) >= 2)
DDaddr += p->width;
}
p->hd44780_functions->senddata(p, dispID, RS_INSTR, POSITION | DDaddr);
p->hd44780_functions->uPause(p, 40); // Minimum exec time for all commands
}
/////////////////////////////////////////////////////////////////
// Flush the framebuffer to the display
//
MODULE_EXPORT void
HD44780_flush(Driver *drvthis)
{
PrivateData *p = (PrivateData *) drvthis->private_data;
int x, y;
int wid = p->width;
char ch;
char drawing;
int row;
int i;
int count;
char refreshNow = 0;
char keepaliveNow = 0;
// force full refresh of display
if ((p->refreshdisplay > 0) && (time(NULL) > p->nextrefresh))
{
refreshNow = 1;
p->nextrefresh = time(NULL) + p->refreshdisplay;
}
// keepalive refresh of display
if ((p->keepalivedisplay > 0) && (time(NULL) > p->nextkeepalive))
{
keepaliveNow = 1;
p->nextkeepalive = time(NULL) + p->keepalivedisplay;
}
// Update LCD incrementally by comparing with last contents
count = 0;
for (y = 0; y < p->height; y++) {
drawing = 0;
for (x = 0 ; x < wid; x++) {
ch = p->framebuf[(y * wid) + x];
if (refreshNow || (x + y == 0 && keepaliveNow) || ch != p->lcd_contents[(y*wid)+x]) {
if (!drawing || x % 8 == 0) { // x%8 is for 16x1 displays !
drawing = 1;
HD44780_position(drvthis,x,y);
}
p->hd44780_functions->senddata(p, p->spanList[y], RS_DATA, available_charmaps[p->charmap].charmap[(unsigned char)ch]);
p->hd44780_functions->uPause(p, 40); // Minimum exec time for all commands
p->lcd_contents[(y*wid)+x] = ch;
count++;
}
else {
drawing = 0;
}
}
}
debug(RPT_DEBUG, "HD44780: flushed %d chars", count);
/* Check which defineable chars we need to update */
count = 0;
for (i = 0; i < NUM_CCs; i++) {
if (!p->cc[i].clean) {
/* Tell the HD44780 we will redefine char number i */
p->hd44780_functions->senddata(p, 0, RS_INSTR, SETCHAR | i * 8);
p->hd44780_functions->uPause(p, 40); // Minimum exec time for all commands
/* Send the subsequent rows */
for (row = 0; row < p->cellheight; row++) {
p->hd44780_functions->senddata(p, 0, RS_DATA, p->cc[i].cache[row]);
p->hd44780_functions->uPause(p, 40); /* Minimum exec time for all commands */
}
p->cc[i].clean = 1; /* mark as clean */
count++;
}
}
debug(RPT_DEBUG, "%s: flushed %d custom chars", drvthis->name, count);
}
/////////////////////////////////////////////////////////////////
// Clear the framebuffer
//
MODULE_EXPORT void
HD44780_clear(Driver *drvthis)
{
PrivateData *p = (PrivateData *) drvthis->private_data;
memset(p->framebuf, ' ', p->width * p->height);
p->ccmode = standard;
}
/////////////////////////////////////////////////////////////////
// Place a character in the framebuffer
//
MODULE_EXPORT void
HD44780_chr(Driver *drvthis, int x, int y, char ch)
{
PrivateData *p = (PrivateData *) drvthis->private_data;
y--;
x--;
if ((x >= 0) && (y >= 0) && (x < p->width) && (y < p->height))
p->framebuf[(y * p->width) + x] = ch;
}
/////////////////////////////////////////////////////////////////
// Place a string in the framebuffer
//
MODULE_EXPORT void
HD44780_string(Driver *drvthis, int x, int y, const char string[])
{
PrivateData *p = (PrivateData *) drvthis->private_data;
int i;
x--; // Convert 1-based coords to 0-based
y--;
if ((y < 0) || (y >= p->height))
return;
for (i = 0; (string[i] != '\0') && (x < p->width); i++, x++) {
if (x >= 0) // no write left of left border
p->framebuf[(y * p->width) + x] = string[i];
}
}
/////////////////////////////////////////////////////////////////
// Sets the backlight on or off
//
MODULE_EXPORT void
HD44780_backlight(Driver *drvthis, int on)
{
PrivateData *p = (PrivateData *) drvthis->private_data;
p->hd44780_functions->backlight (p, on);
}
/////////////////////////////////////////////////////////////////
// Draws a vertical bar...
//
MODULE_EXPORT void
HD44780_vbar(Driver *drvthis, int x, int y, int len, int promille, int options)
{
PrivateData *p = (PrivateData *) drvthis->private_data;
/* x and y are the start position of the bar.
* The bar by default grows in the 'up' direction
* (other direction not yet implemented).
* len is the number of characters that the bar is long at 100%
* promille is the number of promilles (0..1000) that the bar should be filled.
*/
if (p->ccmode != vbar) {
unsigned char vBar[p->cellheight];
int i;
if (p->ccmode != standard) {
/* Not supported(yet) */
report(RPT_WARNING, "%s: vbar: cannot combine two modes using user-defined characters",
drvthis->name);
return;
}
p->ccmode = vbar;
memset(vBar, 0x00, sizeof(vBar));
for (i = 1; i < p->cellheight; i++) {
// add pixel line per pixel line ...
vBar[p->cellheight - i] = 0xFF;
HD44780_set_char(drvthis, i, vBar);
}
}
lib_vbar_static(drvthis, x, y, len, promille, options, p->cellheight, 0);
}
/////////////////////////////////////////////////////////////////
// Draws a horizontal bar to the right.
//
MODULE_EXPORT void
HD44780_hbar(Driver *drvthis, int x, int y, int len, int promille, int options)
{
PrivateData *p = (PrivateData *) drvthis->private_data;
/* x and y are the start position of the bar.
* The bar by default grows in the 'right' direction
* (other direction not yet implemented).
* len is the number of characters that the bar is long at 100%
* promille is the number of promilles (0..1000) that the bar should be filled.
*/
if (p->ccmode != hbar) {
unsigned char hBar[p->cellheight];
int i;
if (p->ccmode != standard) {
/* Not supported(yet) */
report(RPT_WARNING, "%s: hbar: cannot combine two modes using user-defined characters",
drvthis->name);
return;
}
p->ccmode = hbar;
for (i = 1; i <= p->cellwidth; i++) {
// fill pixel columns from left to right.
memset(hBar, 0xFF & ~((1 << (p->cellwidth - i)) - 1), sizeof(hBar));
HD44780_set_char(drvthis, i, hBar);
}
}
lib_hbar_static(drvthis, x, y, len, promille, options, p->cellwidth, 0);
}
/////////////////////////////////////////////////////////////////
// Writes a big number.
//
MODULE_EXPORT void
HD44780_num(Driver *drvthis, int x, int num)
{
PrivateData *p = (PrivateData *) drvthis->private_data;
int do_init = 0;
if ((num < 0) || (num > 10))
return;
if (p->ccmode != bignum) {
if (p->ccmode != standard) {
/* Not supported (yet) */
report(RPT_WARNING, "%s: num: cannot combine two modes using user-defined characters",
drvthis->name);
return;
}
p->ccmode = bignum;
do_init = 1;
}
// Lib_adv_bignum does everything needed to show the bignumbers.
lib_adv_bignum(drvthis, x, num, 0, do_init);
}
/**
* Get total number of custom characters available.
* \param drvthis Pointer to driver structure.
* \return Number of custom characters (always NUM_CCs).
*/
MODULE_EXPORT int
HD44780_get_free_chars(Driver *drvthis)
{
//PrivateData *p = drvthis->private_data;
return NUM_CCs;
}
/////////////////////////////////////////////////////////////////
// Sets a custom character from 0-7...
//
// For input, values > 0 mean "on" and values <= 0 are "off".
//
// The input is just an array of characters...
//
MODULE_EXPORT void
HD44780_set_char(Driver *drvthis, int n, unsigned char *dat)
{
PrivateData *p = (PrivateData *) drvthis->private_data;
unsigned char mask = (1 << p->cellwidth) - 1;
int row;
if ((n < 0) || (n >= NUM_CCs))
return;
if (!dat)
return;
for (row = 0; row < p->cellheight; row++) {
int letter = 0;
if (p->lastline || (row < p->cellheight - 1))
letter = dat[row] & mask;
if (p->cc[n].cache[row] != letter)
p->cc[n].clean = 0; /* only mark dirty if really different */
p->cc[n].cache[row] = letter;
}
}
/////////////////////////////////////////////////////////////
// Set default icon into a userdef char
//
MODULE_EXPORT int
HD44780_icon(Driver *drvthis, int x, int y, int icon)
{
static unsigned char heart_open[] =
{ b__XXXXX,
b__X_X_X,
b_______,
b_______,
b_______,
b__X___X,
b__XX_XX,
b__XXXXX };
static unsigned char heart_filled[] =
{ b__XXXXX,
b__X_X_X,
b___X_X_,
b___XXX_,
b___XXX_,
b__X_X_X,
b__XX_XX,
b__XXXXX };
static unsigned char arrow_up[] =
{ b____X__,
b___XXX_,
b__X_X_X,
b____X__,
b____X__,
b____X__,
b____X__,
b_______ };
static unsigned char arrow_down[] =
{ b____X__,
b____X__,
b____X__,
b____X__,
b__X_X_X,
b___XXX_,
b____X__,
b_______ };
/*
static unsigned char arrow_left[] =
{ b_______,
b____X__,
b___X___,
b__XXXXX,
b___X___,
b____X__,
b_______,
b_______ };
static unsigned char arrow_right[] =
{ b_______,
b____X__,
b_____X_,
b__XXXXX,
b_____X_,
b____X__,
b_______,
b_______ };
*/
static unsigned char checkbox_off[] =
{ b_______,
b_______,
b__XXXXX,
b__X___X,
b__X___X,
b__X___X,
b__XXXXX,
b_______ };
static unsigned char checkbox_on[] =
{ b____X__,
b____X__,
b__XXX_X,
b__X_XX_,
b__X_X_X,
b__X___X,
b__XXXXX,
b_______ };
static unsigned char checkbox_gray[] =
{ b_______,
b_______,
b__XXXXX,
b__X_X_X,
b__XX_XX,
b__X_X_X,
b__XXXXX,
b_______ };
/*
static unsigned char selector_left[] =
{ b___X___,
b___XX__,
b___XXX_,
b___XXXX,
b___XXX_,
b___XX__,
b___X___,
b_______ };
static unsigned char selector_right[] =
{ b_____X_,
b____XX_,
b___XXX_,
b__XXXX_,
b___XXX_,
b____XX_,
b_____X_,
b_______ };
static unsigned char ellipsis[] =
{ b_______,
b_______,
b_______,
b_______,
b_______,
b_______,
b__X_X_X,
b_______ };
*/
static unsigned char block_filled[] =
{ b__XXXXX,
b__XXXXX,
b__XXXXX,
b__XXXXX,
b__XXXXX,
b__XXXXX,
b__XXXXX,
b__XXXXX };
/* Yes I know, this is a VERY BAD implementation */
switch (icon) {
case ICON_BLOCK_FILLED:
HD44780_set_char(drvthis, 6, block_filled);
HD44780_chr(drvthis, x, y, 6);
break;
case ICON_HEART_FILLED:
HD44780_set_char(drvthis, 0, heart_filled);
HD44780_chr(drvthis, x, y, 0);
break;
case ICON_HEART_OPEN:
HD44780_set_char(drvthis, 0, heart_open);
HD44780_chr(drvthis, x, y, 0);
break;
case ICON_ARROW_UP:
HD44780_set_char(drvthis, 1, arrow_up);
HD44780_chr(drvthis, x, y, 1);
break;
case ICON_ARROW_DOWN:
HD44780_set_char(drvthis, 2, arrow_down);
HD44780_chr(drvthis, x, y, 2);
break;
case ICON_ARROW_LEFT:
HD44780_chr(drvthis, x, y, 0x7F);
break;
case ICON_ARROW_RIGHT:
HD44780_chr(drvthis, x, y, 0x7E);
break;
case ICON_CHECKBOX_OFF:
HD44780_set_char(drvthis, 3, checkbox_off);
HD44780_chr(drvthis, x, y, 3);
break;
case ICON_CHECKBOX_ON:
HD44780_set_char(drvthis, 4, checkbox_on);
HD44780_chr(drvthis, x, y, 4);
break;
case ICON_CHECKBOX_GRAY:
HD44780_set_char(drvthis, 5, checkbox_gray);
HD44780_chr(drvthis, x, y, 5);
break;
default:
return -1; /* Let the core do other icons */
}
return 0;
}
/////////////////////////////////////////////////////////////
// Get a key from the keypad (if there is one)
//
MODULE_EXPORT const char *
HD44780_get_key(Driver *drvthis)
{
PrivateData *p = (PrivateData *) drvthis->private_data;
unsigned char scancode;
char * keystr = NULL;
struct timeval curr_time, time_diff;
if (!p->have_keypad) return NULL;
gettimeofday(&curr_time, NULL);
scancode = p->hd44780_functions->scankeypad(p);
if (scancode) {
if (scancode & 0xF0) {
keystr = p->keyMapMatrix[((scancode&0xF0)>>4)-1][(scancode&0x0F)-1];
}
else {
keystr = p->keyMapDirect[scancode - 1];
}
}
if (keystr != NULL) {
if (keystr == p->pressed_key) {
timersub(&curr_time, &(p->pressed_key_time), &time_diff);
if (((time_diff.tv_usec / 1000 + time_diff.tv_sec * 1000) - KEYPAD_AUTOREPEAT_DELAY) < 1000 * p->pressed_key_repetitions / KEYPAD_AUTOREPEAT_FREQ) {
// The key is already pressed quite some time
// but it's not yet time to return a repeated keypress
return NULL;
}
// Otherwise a keypress will be returned
p->pressed_key_repetitions++;
}
else {
// It's a new keypress
p->pressed_key_time = curr_time;
p->pressed_key_repetitions = 0;
report(RPT_INFO, "HD44780_get_key: Key pressed: %s (%d,%d)",
keystr, scancode&0x0F, (scancode&0xF0)>>4);
}
}
// Store the key for the next round
p->pressed_key = keystr;
return keystr;
}
/////////////////////////////////////////////////////////////
// Scan the keypad
//
unsigned char HD44780_scankeypad(PrivateData *p)
{
unsigned int keybits;
unsigned int shiftcount;
unsigned int shiftingbit;
unsigned int Ypattern;
unsigned int Yval;
signed char exp;
unsigned char scancode = 0;
// First check if a directly connected key is pressed
// Put all zeros on Y of keypad
keybits = p->hd44780_functions->readkeypad(p, 0);
if (keybits) {
// A directly connected key was pressed
// Which key was it ?
shiftingbit = 1;
for (shiftcount = 0; shiftcount < KEYPAD_MAXX && !scancode; shiftcount++) {
if (keybits & shiftingbit) {
// Found ! Return from function.
scancode = shiftcount+1;
}
shiftingbit <<= 1;
}
}
else {
// Now check the matrix
// First check with all 1's
Ypattern = (1 << KEYPAD_MAXY) - 1;
if (p->hd44780_functions->readkeypad(p, Ypattern)) {
// Yes, a key on the matrix is pressed
// OK, now we know a key is pressed.
// Determine which one it is
// First determine the row
// Do a 'binary search' to minimize I/O
Ypattern = 0;
Yval = 0;
for (exp=3; exp>=0; exp--) {
Ypattern = ((1 << (1 << exp)) - 1) << Yval;
keybits = p->hd44780_functions->readkeypad(p, Ypattern);
if (!keybits) {
Yval += (1 << exp);
}
}
// Which key is pressed in that row ?
keybits = p->hd44780_functions->readkeypad(p, 1<<Yval);
shiftingbit = 1;
for (shiftcount = 0; shiftcount < KEYPAD_MAXX && !scancode; shiftcount++) {
if (keybits & shiftingbit) {
// Found !
scancode = (Yval+1) << 4 | (shiftcount+1);
}
shiftingbit <<= 1;
}
}
}
return scancode;
}
/////////////////////////////////////////////////////////////
// Output to the optional output latch(es)
//
MODULE_EXPORT void
HD44780_output(Driver *drvthis, int on)
{
PrivateData *p = drvthis->private_data;
if (!p->have_output) return; /* output disabled */
if (!p->hd44780_functions->output) return; /* unsupported for selected connectiontype */
// perhaps it is better just to do this every time in case of a glitch
// but leaving this in does make sure that any latch-enable line glitches
// are more easily seen
if (p->output_state == on) return;
p->output_state = on;
p->hd44780_functions->output(p, on);
}
/////////////////////////////////////////////////////////////
// Parse the span list
// spanListArray - array to store vertical spans
// spLsize - size of spanListArray
// dispOffsets - array to store display offsets
// dOffsize - size of dispOffsets
// dispSizeArray - array of display vertical sizes (= spanlist)
// spanlist - null terminated input span list in comma delimited
// format. All span elements [1-9] e.g. "1,4,2"
// returns number of span elements, -1 on parse error
int
parse_span_list(int *spanListArray[], int *spLsize, int *dispOffsets[], int *dOffsize, int *dispSizeArray[], const char *spanlist)
{
int j = 0, retVal = 0;
*spLsize = 0;
*dOffsize = 0;
while (j < strlen(spanlist)) {
if (spanlist[j] >= '1' && spanlist[j] <= '9') {
int spansize = spanlist[j] - '0';
// add spansize lines to the span list, note the offset to
// the previous display and the size of the display
if ((*spanListArray = (int *) realloc(*spanListArray, sizeof(int) * (*spLsize + spansize)))
&& (*dispOffsets = (int *) realloc(*dispOffsets, sizeof(int) * (*dOffsize + 1)))
&& (*dispSizeArray = (int *) realloc(*dispSizeArray, sizeof(int) * (*dOffsize + 1)))) {
int k;
for (k = 0; k < spansize; ++k)
(*spanListArray)[*spLsize + k] = *dOffsize + 1;
(*dispOffsets)[*dOffsize] = *spLsize;
(*dispSizeArray)[*dOffsize] = spansize;
*spLsize += spansize;
++(*dOffsize);
retVal = *dOffsize;
// find the next number (\0 is also outside this range)
for (++j; spanlist[j] < '1' || spanlist[j] > '9'; ++j);
} else {
retVal = -1;
}
} else {
retVal = -1;
}
}
return retVal;
}
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