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drv_Crystalfontz.c
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drv_Crystalfontz.c
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/* $Id$
* $URL$
*
* new style driver for Crystalfontz display modules
*
* Copyright (C) 1999, 2000 Michael Reinelt <michael@reinelt.co.at>
* Copyright (C) 2004 The LCD4Linux Team <lcd4linux-devel@users.sourceforge.net>
*
* 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_Crystalfontz
*
*/
#include "config.h"
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <sys/time.h>
#include "debug.h"
#include "cfg.h"
#include "qprintf.h"
#include "thread.h"
#include "timer.h"
#include "plugin.h"
#include "widget.h"
#include "widget_text.h"
#include "widget_icon.h"
#include "widget_bar.h"
#include "widget_keypad.h"
#include "drv.h"
#include "drv_generic_text.h"
#include "drv_generic_gpio.h"
#include "drv_generic_serial.h"
#include "drv_generic_keypad.h"
static char Name[] = "Crystalfontz";
static int Model;
static int Protocol;
static int Payload;
/* ring buffer for bytes received from the display */
static unsigned char RingBuffer[256];
static unsigned int RingRPos = 0;
static unsigned int RingWPos = 0;
/* packet from the display */
struct {
unsigned char type;
unsigned char code;
unsigned char size;
unsigned char data[16 + 1]; /* trailing '\0' */
} Packet;
/* Line Buffer for 633 displays */
static unsigned char Line[2 * 16];
/* Fan RPM */
static double Fan_RPM[4] = { 0.0, };
/* Temperature sensors */
static double Temperature[32] = { 0.0, };
typedef struct {
int type;
char *name;
int rows;
int cols;
int gpis;
int gpos;
int protocol;
int payload;
} MODEL;
/* Fixme #1: number of GPI's & GPO's should be verified */
/* Fixme #2: protocol should be verified */
/* Fixme #3: number of keys on the keypad should be verified */
static MODEL Models[] = {
{626, "626", 2, 16, 0, 0, 1, 0},
{631, "631", 2, 20, 4, 0, 3, 22},
{632, "632", 2, 16, 0, 0, 1, 0},
{633, "633", 2, 16, 4, 4, 2, 18},
{634, "634", 4, 20, 0, 0, 1, 0},
{635, "635", 4, 20, 4, 12, 3, 22},
{636, "636", 2, 16, 0, 0, 1, 0},
{-1, "Unknown", -1, -1, 0, 0, 0, 0}
};
/****************************************/
/*** hardware dependant functions ***/
/****************************************/
/* x^0 + x^5 + x^12 */
#define CRCPOLY 0x8408
static unsigned short CRC(const unsigned char *p, size_t len, unsigned short seed)
{
int i;
while (len--) {
seed ^= *p++;
for (i = 0; i < 8; i++)
seed = (seed >> 1) ^ ((seed & 1) ? CRCPOLY : 0);
}
return ~seed;
}
static unsigned char LSB(const unsigned short word)
{
return word & 0xff;
}
static unsigned char MSB(const unsigned short word)
{
return word >> 8;
}
static unsigned char byte(unsigned int pos)
{
pos += RingRPos;
if (pos >= sizeof(RingBuffer))
pos -= sizeof(RingBuffer);
return RingBuffer[pos];
}
static void drv_CF_process_packet(void)
{
switch (Packet.type) {
case 0x02:
/* async response from display to host */
switch (Packet.code) {
case 0x00:
/* Key Activity */
debug("Key Activity: %d", Packet.data[0]);
drv_generic_keypad_press(Packet.data[0]);
break;
case 0x01:
/* Fan Speed Report */
if (Packet.data[1] == 0xff) {
Fan_RPM[Packet.data[0]] = -1.0;
} else if (Packet.data[1] < 4) {
Fan_RPM[Packet.data[0]] = 0.0;
} else {
Fan_RPM[Packet.data[0]] =
(double) 27692308L *(Packet.data[1] - 3) / (Packet.data[2] + 256 * Packet.data[3]);
}
break;
case 0x02:
/* Temperature Sensor Report */
switch (Packet.data[3]) {
case 0:
error("%s: 1-Wire device #%d: CRC error", Name, Packet.data[0]);
break;
case 1:
case 2:
Temperature[Packet.data[0]] = (Packet.data[1] + 256 * Packet.data[2]) / 16.0;
break;
default:
error("%s: 1-Wire device #%d: unknown CRC status %d", Name, Packet.data[0], Packet.data[3]);
break;
}
break;
default:
/* this should not happen */
error("%s: unexpected response type=0x%02x code=0x%02x size=%d", Name, Packet.type, Packet.code,
Packet.size);
break;
}
break;
case 0x03:
/* error response from display to host */
error("%s: error response type=0x%02x code=0x%02x size=%d", Name, Packet.type, Packet.code, Packet.size);
break;
default:
/* these should not happen: */
/* type 0x00: command from host to display: should never come back */
/* type 0x01: command response from display to host: are processed within send() */
error("%s: unexpected packet type=0x%02x code=0x%02x size=%d", Name, Packet.type, Packet.code, Packet.size);
break;
}
}
static int drv_CF_poll(void)
{
/* read into RingBuffer */
while (1) {
char buffer[32];
int num, n;
num = drv_generic_serial_poll(buffer, sizeof(buffer));
if (num <= 0)
break;
/* put result into RingBuffer */
for (n = 0; n < num; n++) {
RingBuffer[RingWPos++] = (unsigned char) buffer[n];
if (RingWPos >= sizeof(RingBuffer))
RingWPos = 0;
}
}
/* process RingBuffer */
while (1) {
unsigned char buffer[32];
int n, num, size;
unsigned short crc;
/* packet size */
num = RingWPos - RingRPos;
if (num < 0)
num += sizeof(RingBuffer);
/* minimum packet size=4 */
if (num < 4)
return 0;
/* valid response types: 01xxxxx 10.. 11.. */
/* therefore: 00xxxxxx is invalid */
if (byte(0) >> 6 == 0)
goto GARBAGE;
/* command length */
size = byte(1);
/* valid command length is 0 to 16 */
if (size > 16)
goto GARBAGE;
/* all bytes available? */
if (num < size + 4)
return 0;
/* check CRC */
for (n = 0; n < size + 4; n++)
buffer[n] = byte(n);
crc = CRC(buffer, size + 2, 0xffff);
if (LSB(crc) != buffer[size + 2])
goto GARBAGE;
if (MSB(crc) != buffer[size + 3])
goto GARBAGE;
/* process packet */
Packet.type = buffer[0] >> 6;
Packet.code = buffer[0] & 0x3f;
Packet.size = size;
memcpy(Packet.data, buffer + 2, size);
Packet.data[size] = '\0'; /* trailing zero */
/* increment read pointer */
RingRPos += size + 4;
if (RingRPos >= sizeof(RingBuffer))
RingRPos -= sizeof(RingBuffer);
/* a packet arrived */
return 1;
GARBAGE:
debug("dropping garbage byte %02x", byte(0));
RingRPos++;
if (RingRPos >= sizeof(RingBuffer))
RingRPos = 0;
continue;
}
/* not reached */
return 0;
}
static void drv_CF_timer(void __attribute__ ((unused)) * notused)
{
while (drv_CF_poll()) {
drv_CF_process_packet();
}
}
static void drv_CF_send(const unsigned char cmd, const unsigned char len, const unsigned char *data)
{
/* 1 cmd + 1 len + 22 payload + 2 crc = 26 */
unsigned char buffer[26];
unsigned short crc;
struct timeval now, end;
if (len > Payload) {
error("%s: internal error: packet length %d exceeds payload size %d", Name, len, Payload);
return;
}
buffer[0] = cmd;
buffer[1] = len;
memcpy(buffer + 2, data, len);
crc = CRC(buffer, len + 2, 0xffff);
buffer[len + 2] = LSB(crc);
buffer[len + 3] = MSB(crc);
drv_generic_serial_write((char *) buffer, len + 4);
/* wait for acknowledge packet */
gettimeofday(&now, NULL);
while (1) {
/* delay 1 msec */
usleep(1 * 1000);
if (drv_CF_poll()) {
if (Packet.type == 0x01 && Packet.code == cmd) {
/* this is the ack we're waiting for */
if (0) {
gettimeofday(&end, NULL);
debug("%s: ACK after %ld usec", Name,
1000000 * (end.tv_sec - now.tv_sec) + end.tv_usec - now.tv_usec);
}
break;
} else {
/* some other (maybe async) packet, just process it */
drv_CF_process_packet();
}
}
gettimeofday(&end, NULL);
/* don't wait more than 250 msec */
if ((1000000 * (end.tv_sec - now.tv_sec) + end.tv_usec - now.tv_usec) > 250 * 1000) {
error("%s: timeout waiting for response to cmd 0x%02x", Name, cmd);
break;
}
}
}
/* check http://www.crystalfontz.com/products/634/cgrom.html */
/* HINT: the input should using the ISO-8859-1 charset */
void convertToCgrom2(char *str)
{
unsigned int i;
for (i = 0; i < strlen(str); i++) {
switch ((unsigned char) str[i]) {
case 0x5d: /* ] */
str[i] = 252;
break;
case 0x5b: /* [ */
str[i] = 250;
break;
case 0x24: /* $ */
str[i] = 162;
break;
case 0x40: /* @ */
str[i] = 160;
break;
case 0x5c: /* \ */
str[i] = 251;
break;
case 0x7b: /* { */
str[i] = 253;
break;
case 0x7d: /* } */
str[i] = 255;
break;
case 0x7c:
str[i] = 254; /* pipe */
break;
case 0x27:
case 0x60:
case 0xB4:
str[i] = 39; /* ' */
break;
case 0xe8:
str[i] = 164; /* french e */
break;
case 0xe9:
str[i] = 165; /* french e */
break;
case 0xc8:
str[i] = 197; /* french E */
break;
case 0xc9:
str[i] = 207; /* french E */
break;
case 0xe4:
str[i] = 123; /* small german ae */
break;
case 0xc4:
str[i] = 91; /* big german ae */
break;
case 0xf6:
str[i] = 124; /* small german oe */
break;
case 0xd6:
str[i] = 92; /* big german oe */
break;
case 0xfc:
str[i] = 126; /* small german ue */
break;
case 0xdc:
str[i] = 94; /* big german ue */
break;
case 0x5e: /* ^ */
str[i] = 253;
break;
case 0x5f: /* _ */
str[i] = 254;
break;
default:
break;
}
}
}
static void drv_CF_write1(const int row, const int col, const char *data, const int len)
{
char cmd[3] = "\021xy"; /* set cursor position */
if (row == 0 && col == 0) {
drv_generic_serial_write("\001", 1); /* cursor home */
} else {
cmd[1] = (char) col;
cmd[2] = (char) row;
drv_generic_serial_write(cmd, 3);
}
/* Model 634 and 632 use another ROM */
if (Model == 4 || Model == 2) {
convertToCgrom2((char *) data);
}
drv_generic_serial_write(data, len);
}
static void drv_CF_write2(const int row, const int col, const char *data, const int len)
{
int l = len;
/* limit length */
if (col + l > 16)
l = 16 - col;
if (l < 0)
l = 0;
/* sanity check */
if (row >= 2 || col + l > 16) {
error("%s: internal error: write outside linebuffer bounds!", Name);
return;
}
memcpy(Line + 16 * row + col, data, l);
drv_CF_send(7 + row, 16, (unsigned char *) (Line + 16 * row));
}
static void drv_CF_write3(const int row, const int col, const char *data, const int len)
{
int l = len;
unsigned char cmd[23];
/* limit length */
if (col + l > DCOLS)
l = DCOLS - col;
if (l < 0)
l = 0;
/* sanity check */
if (row >= DROWS || col + l > DCOLS) {
error("%s: internal error: write outside display bounds!", Name);
return;
}
cmd[0] = col;
cmd[1] = row;
memcpy(cmd + 2, data, l);
drv_CF_send(31, l + 2, cmd);
}
static void drv_CF_defchar1(const int ascii, const unsigned char *matrix)
{
int i;
char cmd[10] = "\031n"; /* set custom char bitmap */
/* user-defineable chars start at 128, but are defined at 0 */
cmd[1] = (char) (ascii - CHAR0);
for (i = 0; i < 8; i++) {
cmd[i + 2] = matrix[i] & 0x3f;
}
drv_generic_serial_write(cmd, 10);
}
static void drv_CF_defchar23(const int ascii, const unsigned char *matrix)
{
int i;
unsigned char buffer[9];
/* user-defineable chars start at 128, but are defined at 0 */
buffer[0] = (char) (ascii - CHAR0);
/* clear bit 6 and 7 of the bitmap (blinking) */
for (i = 0; i < 8; i++) {
buffer[i + 1] = matrix[i] & 0x3f;
}
drv_CF_send(9, 9, buffer);
}
static int drv_CF_contrast(int contrast)
{
static unsigned char Contrast = 0;
char buffer[2];
/* -1 is used to query the current contrast */
if (contrast == -1)
return Contrast;
if (contrast < 0)
contrast = 0;
if (contrast > 255)
contrast = 255;
Contrast = contrast;
switch (Protocol) {
case 1:
/* contrast range 0 to 100 */
if (Contrast > 100)
Contrast = 100;
buffer[0] = 15; /* Set LCD Contrast */
buffer[1] = Contrast;
drv_generic_serial_write(buffer, 2);
break;
case 2:
/* contrast range 0 to 50 */
if (Contrast > 50)
Contrast = 50;
drv_CF_send(13, 1, &Contrast);
break;
case 3:
/* contrast range 0 to 255 */
drv_CF_send(13, 1, &Contrast);
break;
}
return Contrast;
}
static int drv_CF_backlight(int backlight)
{
static unsigned char Backlight = 0;
char buffer[2];
/* -1 is used to query the current backlight */
if (backlight == -1)
return Backlight;
if (backlight < 0)
backlight = 0;
if (backlight > 100)
backlight = 100;
Backlight = backlight;
switch (Protocol) {
case 1:
buffer[0] = 14; /* Set LCD Backlight */
buffer[1] = Backlight;
drv_generic_serial_write(buffer, 2);
break;
case 2:
case 3:
drv_CF_send(14, 1, &Backlight);
break;
}
return Backlight;
}
static int drv_CF_keypad(const int num)
{
int val = 0;
switch (Protocol) {
case 1:
case 2:
break;
case 3:
if ((num < 7) || ((num > 12) && (num < 17)))
val = WIDGET_KEY_PRESSED;
else
val = WIDGET_KEY_RELEASED;
switch (num) {
case 1:
case 7:
val += WIDGET_KEY_UP;
break;
case 2:
case 8:
val += WIDGET_KEY_DOWN;
break;
case 3:
case 9:
val += WIDGET_KEY_LEFT;
break;
case 4:
case 10:
val += WIDGET_KEY_RIGHT;
break;
case 5:
case 11:
val += WIDGET_KEY_CONFIRM;
break;
case 6:
case 12:
val += WIDGET_KEY_CANCEL;
break;
/* added for 631, too lazy to make new WIDGET_KEY defines */
case 13:
case 17:
val += WIDGET_KEY_UP; /* really UPLEFT */
break;
case 14:
case 18:
val += WIDGET_KEY_RIGHT; /* really UPRIGHT */
break;
case 15:
case 19:
val += WIDGET_KEY_LEFT; /* really DOWNLEFT */
break;
case 16:
case 20:
val += WIDGET_KEY_DOWN; /* really DOWNRIGHT */
break;
}
break;
}
return val;
}
static int drv_CF_GPI(const int num)
{
if (num < 0 || num > 3) {
return 0;
}
return Fan_RPM[num];
}
static int drv_CF_GPO(const int num, const int val)
{
static unsigned char PWM2[4] = { 0, 0, 0, 0 };
static unsigned char PWM3[2];
int v = val;
if (v < 0)
v = 0;
if (v > 100)
v = 100;
switch (Protocol) {
case 2:
PWM2[num] = v;
drv_CF_send(17, 4, PWM2);
break;
case 3:
PWM3[0] = num + 1;
PWM3[1] = v;
drv_CF_send(34, 2, PWM3);
break;
}
return v;
}
static int drv_CF_autodetect(void)
{
int m;
/* only autodetect newer displays */
if (Protocol < 2)
return -1;
/* read display type */
drv_CF_send(1, 0, NULL);
/* send() did already wait for response packet */
if (Packet.type == 0x01 && Packet.code == 0x01) {
char t[7], c;
float h, v;
info("%s: display identifies itself as '%s'", Name, Packet.data);
if (sscanf((char *) Packet.data, "%6s:h%f,%c%f", t, &h, &c, &v) != 4) {
error("%s: error parsing display identification string", Name);
return -1;
}
info("%s: display type '%s', hardware version %3.1f, firmware version %c%3.1f", Name, t, h, c, v);
if (strncmp(t, "CFA", 3) == 0) {
for (m = 0; Models[m].type != -1; m++) {
/* omit the 'CFA' */
if (strcasecmp(Models[m].name, t + 3) == 0)
return m;
}
}
error("%s: display type '%s' may be not supported!", Name, t);
return -1;
}
error("%s: display detection failed!", Name);
return -1;
}
static char *drv_CF_print_ROM(void)
{
static char buffer[17];
snprintf(buffer, sizeof(buffer), "0x%02x%02x%02x%02x%02x%02x%02x%02x",
Packet.data[1], Packet.data[2], Packet.data[3], Packet.data[4], Packet.data[5], Packet.data[6],
Packet.data[7], Packet.data[8]);
return buffer;
}
static int drv_CF_scan_DOW(unsigned char index)
{
int i;
/* Read DOW Device Information */
drv_CF_send(18, 1, &index);
i = 0;
while (1) {
/* wait 10 msec */
usleep(10 * 1000);
/* packet available? */
if (drv_CF_poll()) {
/* DOW Device Info */
if (Packet.type == 0x01 && Packet.code == 0x12) {
switch (Packet.data[1]) {
case 0x00:
/* no device found */
return 0;
case 0x22:
info("%s: 1-Wire device #%d: DS1822 temperature sensor found at %s", Name, Packet.data[0],
drv_CF_print_ROM());
return 1;
case 0x28:
info("%s: 1-Wire device #%d: DS18B20 temperature sensor found at %s", Name, Packet.data[0],
drv_CF_print_ROM());
return 1;
default:
info("%s: 1-Wire device #%d: unknown device found at %s", Name, Packet.data[0], drv_CF_print_ROM());
return 0;
}
} else {
drv_CF_process_packet();
}
}
/* wait no longer than 300 msec */
if (++i > 30) {
error("%s: 1-Wire device #%d detection timed out", Name, index);
return -1;
}
}
/* not reached */
return -1;
}
/* clear display */
static void drv_CF_clear(void)
{
switch (Protocol) {
case 1:
drv_generic_serial_write("\014", 1);
break;
case 2:
case 3:
drv_CF_send(6, 0, NULL);
break;
}
}
/* init sequences for 626, 632, 634, 636 */
static void drv_CF_start_1(void)
{
drv_generic_serial_write("\014", 1); /* Form Feed (Clear Display) */
drv_generic_serial_write("\004", 1); /* hide cursor */
drv_generic_serial_write("\024", 1); /* scroll off */
drv_generic_serial_write("\030", 1); /* wrap off */
}
/* init sequences for 633 */
static void drv_CF_start_2(void)
{
int i;
unsigned long mask;
unsigned char buffer[4];
/* Clear Display */
drv_CF_send(6, 0, NULL);
/* Set LCD Cursor Style */
buffer[0] = 0;
drv_CF_send(12, 1, buffer);
/* enable Fan Reporting */
buffer[0] = 15;
drv_CF_send(16, 1, buffer);
/* Set Fan Power to 100% */
buffer[0] = buffer[1] = buffer[2] = buffer[3] = 100;
drv_CF_send(17, 4, buffer);
/* Read DOW Device Information */
mask = 0;
for (i = 0; i < 32; i++) {
if (drv_CF_scan_DOW(i) == 1) {
mask |= 1 << i;
}
}
/* enable Temperature Reporting */
buffer[0] = mask & 0xff;
buffer[1] = (mask >> 8) & 0xff;
buffer[2] = (mask >> 16) & 0xff;
buffer[3] = (mask >> 24) & 0xff;
drv_CF_send(19, 4, buffer);
}
/* init sequences for 631 */
static void drv_CF_start_3(void)
{
unsigned char buffer[1];
/* Clear Display */
drv_CF_send(6, 0, NULL);
/* Set LCD Cursor Style */
buffer[0] = 0;
drv_CF_send(12, 1, buffer);
}
static int drv_CF_start(const char *section)
{
int i;
char *model;
model = cfg_get(section, "Model", NULL);
if (model != NULL && *model != '\0') {
for (i = 0; Models[i].type != -1; i++) {
if (strcasecmp(Models[i].name, model) == 0)
break;
}
if (Models[i].type == -1) {
error("%s: %s.Model '%s' is unknown from %s", Name, section, model, cfg_source());
return -1;
}
Model = i;
Protocol = Models[Model].protocol;
info("%s: using model '%s'", Name, Models[Model].name);
} else {
Model = -1;
Protocol = 2; /*auto-detect only newer displays */
info("%s: no '%s.Model' entry from %s, auto-detecting", Name, section, cfg_source());
}
/* open serial port */
if (drv_generic_serial_open(section, Name, 0) < 0)
return -1;
/* Fixme: why such a large delay? */
usleep(350 * 1000);
/* display autodetection */
i = drv_CF_autodetect();
if (Model == -1)
Model = i;
if (Model == -1) {
error("%s: auto-detection failed, please specify a '%s.Model' entry in %s", Name, section, cfg_source());
return -1;
}
if (i != -1 && Model != i) {
error("%s: %s.Model '%s' from %s does not match detected model '%s'", Name, section, model, cfg_source(),
Models[i].name);
return -1;
}
/* initialize global variables */
DROWS = Models[Model].rows;
DCOLS = Models[Model].cols;
GPIS = Models[Model].gpis;
GPOS = Models[Model].gpos;
Protocol = Models[Model].protocol;
Payload = Models[Model].payload;
switch (Protocol) {
case 1:
drv_CF_start_1();
break;
case 2:
/* regularly process display answers */
/* Fixme: make 100msec configurable */
timer_add(drv_CF_timer, NULL, 100, 0);
drv_CF_start_2();
/* clear 633 linebuffer */
memset(Line, ' ', sizeof(Line));
break;
case 3:
/* regularly process display answers */
/* Fixme: make 100msec configurable */
timer_add(drv_CF_timer, NULL, 100, 0);
drv_CF_start_3();
break;
}
/* set contrast */
if (cfg_number(section, "Contrast", 0, 0, 255, &i) > 0) {
drv_CF_contrast(i);
}
/* set backlight */
if (cfg_number(section, "Backlight", 0, 0, 100, &i) > 0) {
drv_CF_backlight(i);
}
return 0;
}
/****************************************/
/*** plugins ***/
/****************************************/
static void plugin_contrast(RESULT * result, const int argc, RESULT * argv[])
{
double contrast;
switch (argc) {
case 0:
contrast = drv_CF_contrast(-1);
SetResult(&result, R_NUMBER, &contrast);
break;
case 1:
contrast = drv_CF_contrast(R2N(argv[0]));
SetResult(&result, R_NUMBER, &contrast);
break;
default:
error("%s.contrast(): wrong number of parameters", Name);
SetResult(&result, R_STRING, "");
}
}