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archived-lcd4linux/drv_picoLCDGraphic.c
michael 71247fb889 patch for picoLCDGraphics that adds keypad/gpi/gpo capabilities from Nicu Pavel 
git-svn-id: https://ssl.bulix.org/svn/lcd4linux/trunk@985 3ae390bd-cb1e-0410-b409-cd5a39f66f1f
2009-02-28 06:09:05 +00:00

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/* $Id$
* $URL$
*
* driver for picoLCD Graphic(256x64) 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) 2009 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_picoLCDGraphic
*
*/
#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_gpio.h"
#include "drv_generic_keypad.h"
#include "drv_generic_graphic.h"
#define picoLCD_VENDOR 0x04d8
#define picoLCD_DEVICE 0xc002
#define OUT_REPORT_LED_STATE 0x81
#define OUT_REPORT_LCD_BACKLIGHT 0x91
#define OUT_REPORT_LCD_CONTRAST 0x92
#define OUT_REPORT_CMD 0x94
#define OUT_REPORT_DATA 0x95
#define OUT_REPORT_CMD_DATA 0x96
#define SCREEN_H 64
#define SCREEN_W 256
#if 1
#define DEBUG(x) debug("%s(): %s", __FUNCTION__, x);
#else
#define DEBUG(x)
#endif
static char Name[] = "picoLCDGraphic";
static unsigned char *pLG_framebuffer;
/* used to display white text on black background or inverse */
unsigned char inverted = 0;
static unsigned int gpo = 0;
static char *Buffer;
static char *BufPtr;
static usb_dev_handle *lcd;
//extern int usb_debug;
int usb_debug;
/****************************************/
/*** hardware dependant functions ***/
/****************************************/
static int drv_pLG_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 256x64...", Name);
usb_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_pLG_read(unsigned char *data, int size)
{
return usb_interrupt_read(lcd, USB_ENDPOINT_IN + 1, (char *) data, size, 1000);
}
static void drv_pLG_send(unsigned char *data, int size)
{
int ret;
ret = usb_interrupt_write(lcd, USB_ENDPOINT_OUT + 1, (char *) data, size, 1000);
//fprintf(stderr, "%s written %d bytes\n", __FUNCTION__, ret);
}
static int drv_pLG_close(void)
{
usb_release_interface(lcd, 0);
usb_close(lcd);
return 0;
}
static void drv_pLG_update_img()
{
unsigned char cmd3[64] = { OUT_REPORT_CMD_DATA }; /* send command + data */
unsigned char cmd4[64] = { OUT_REPORT_DATA }; /* send data only */
int index, bit, x, y;
unsigned char cs, line;
unsigned char pixel;
info("In %s\n", __FUNCTION__);
for (cs = 0; cs < 4; cs++) {
unsigned char chipsel = (cs << 2); //chipselect
for (line = 0; line < 8; line++) {
//ha64_1.setHIDPkt(OUT_REPORT_CMD_DATA, 8+3+32, 8, chipsel, 0x02, 0x00, 0x00, 0xb8|j, 0x00, 0x00, 0x40);
cmd3[0] = OUT_REPORT_CMD_DATA;
cmd3[1] = chipsel;
cmd3[2] = 0x02;
cmd3[3] = 0x00;
cmd3[4] = 0x00;
cmd3[5] = 0xb8 | line;
cmd3[6] = 0x00;
cmd3[7] = 0x00;
cmd3[8] = 0x40;
cmd3[9] = 0x00;
cmd3[10] = 0x00;
cmd3[11] = 32;
//ha64_2.setHIDPkt(OUT_REPORT_DATA, 4+32, 4, chipsel | 0x01, 0x00, 0x00, 32);
cmd4[0] = OUT_REPORT_DATA;
cmd4[1] = chipsel | 0x01;
cmd4[2] = 0x00;
cmd4[3] = 0x00;
cmd4[4] = 32;
for (index = 0; index < 32; index++) {
pixel = 0x00;
for (bit = 0; bit < 8; bit++) {
x = cs * 64 + index;
y = (line * 8 + bit + 0) % SCREEN_H;
if (pLG_framebuffer[y * 256 + x] ^ inverted)
pixel |= (1 << bit);
}
cmd3[12 + index] = pixel;
}
for (index = 32; index < 64; index++) {
pixel = 0x00;
for (bit = 0; bit < 8; bit++) {
x = cs * 64 + index;
y = (line * 8 + bit + 0) % SCREEN_H;
if (pLG_framebuffer[y * 256 + x] ^ inverted)
pixel |= (1 << bit);
}
cmd4[5 + (index - 32)] = pixel;
}
drv_pLG_send(cmd3, 44);
drv_pLG_send(cmd4, 38);
}
}
//drv_pLG_clear();
}
/* for graphic displays only */
static void drv_pLG_blit(const int row, const int col, const int height, const int width)
{
int r, c;
//DEBUG(fprintf(stderr, "In %s called with row %d col %d height %d width %d\n", __FUNCTION__, row, col, height, width));
for (r = row; r < row + height; r++) {
for (c = col; c < col + width; c++) {
pLG_framebuffer[r * 256 + c] = drv_generic_graphic_black(r, c);
//fprintf(stderr, "%d", pLG_framebuffer[r * 256 + c]);
}
//fprintf(stderr, "\n");
}
/*
for (r = 0; r < 64; r++) {
for(c = 0; c < 256; c++) {
fprintf(stderr, "%d", pLG_framebuffer[r * 256 + c]);
}
fprintf(stderr, "\n");
}
*/
drv_pLG_update_img();
}
void drv_pLG_clear(void)
{
unsigned char cmd[3] = { 0x93, 0x01, 0x00 }; /* init display */
unsigned char cmd2[9] = { OUT_REPORT_CMD }; /* init display */
unsigned char cmd3[64] = { OUT_REPORT_CMD_DATA }; /* clear screen */
unsigned char cmd4[64] = { OUT_REPORT_CMD_DATA }; /* clear screen */
int init, index;
unsigned char cs, line;
info("In %s\n", __FUNCTION__);
drv_pLG_send(cmd, 3);
for (init = 0; init < 4; init++) {
unsigned char cs = ((init << 2) & 0xFF);
cmd2[0] = OUT_REPORT_CMD;
cmd2[1] = cs;
cmd2[2] = 0x02;
cmd2[3] = 0x00;
cmd2[4] = 0x64;
cmd2[5] = 0x3F;
cmd2[6] = 0x00;
cmd2[7] = 0x64;
cmd2[8] = 0xC0;
drv_pLG_send(cmd2, 9);
}
for (cs = 0; cs < 4; cs++) {
unsigned char chipsel = (cs << 2); //chipselect
for (line = 0; line < 8; line++) {
//ha64_1.setHIDPkt(OUT_REPORT_CMD_DATA, 8+3+32, 8, cs, 0x02, 0x00, 0x00, 0xb8|j, 0x00, 0x00, 0x40);
cmd3[0] = OUT_REPORT_CMD_DATA;
cmd3[1] = chipsel;
cmd3[2] = 0x02;
cmd3[3] = 0x00;
cmd3[4] = 0x00;
cmd3[5] = 0xb8 | line;
cmd3[6] = 0x00;
cmd3[7] = 0x00;
cmd3[8] = 0x40;
cmd3[9] = 0x00;
cmd3[10] = 0x00;
cmd3[11] = 32;
unsigned char temp = 0;
for (index = 0; index < 32; index++) {
cmd3[12 + index] = temp;
}
drv_pLG_send(cmd3, 64);
//ha64_2.setHIDPkt(OUT_REPORT_DATA, 4+32, 4, cs | 0x01, 0x00, 0x00, 32);
cmd4[0] = OUT_REPORT_DATA;
cmd4[1] = chipsel | 0x01;
cmd4[2] = 0x00;
cmd4[3] = 0x00;
cmd4[4] = 32;
for (index = 32; index < 64; index++) {
temp = 0x00;
cmd4[5 + (index - 32)] = temp;
}
drv_pLG_send(cmd4, 64);
}
}
}
static int drv_pLG_contrast(int contrast)
{
unsigned char cmd[2] = { 0x92 }; /* set contrast */
if (contrast < 0)
contrast = 0;
if (contrast > 255)
contrast = 255;
cmd[1] = contrast;
drv_pLG_send(cmd, 2);
return contrast;
}
static int drv_pLG_backlight(int backlight)
{
unsigned char cmd[2] = { 0x91 }; /* set backlight */
if (backlight < 0)
backlight = 0;
if (backlight >= 1)
backlight = 200;
cmd[1] = backlight;
drv_pLG_send(cmd, 2);
return backlight;
}
#define _USBLCD_MAX_DATA_LEN 24
#define IN_REPORT_KEY_STATE 0x11
static int drv_pLG_gpi( __attribute__ ((unused))
int num)
{
int ret;
unsigned char read_packet[_USBLCD_MAX_DATA_LEN];
ret = drv_pLG_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_pLG_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_pLG_send(cmd, 2);
return val;
}
static int drv_pLG_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;
}
if (cfg_number(section, "Inverted", 0, 0, 1, &value) > 0) {
info("Setting display inverted to %d", value);
inverted = value;
}
DROWS = SCREEN_H;
DCOLS = SCREEN_W;
if (drv_pLG_open() < 0) {
return -1;
}
/* Init the command buffer */
Buffer = (char *) malloc(1024);
if (Buffer == NULL) {
error("%s: coommand buffer could not be allocated: malloc() failed", Name);
return -1;
}
BufPtr = Buffer;
/* Init framebuffer buffer */
pLG_framebuffer = malloc(SCREEN_W * SCREEN_H * sizeof(unsigned char));
if (!pLG_framebuffer)
return -1;
DEBUG("allocated");
memset(pLG_framebuffer, 0, SCREEN_W * SCREEN_H);
DEBUG("zeroed");
if (cfg_number(section, "Contrast", 0, 0, 255, &value) > 0) {
info("Setting contrast to %d", value);
drv_pLG_contrast(value);
}
if (cfg_number(section, "Backlight", 0, 0, 1, &value) > 0) {
info("Setting backlight to %d", value);
drv_pLG_backlight(value);
}
drv_pLG_clear(); /* clear display */
if (!quiet) {
char buffer[40];
qprintf(buffer, sizeof(buffer), "%s %dx%d", Name, SCREEN_W, SCREEN_H);
if (drv_generic_graphic_greet(buffer, "http://www.picolcd.com")) {
sleep(3);
drv_pLG_clear();
}
}
return 0;
}
/****************************************/
/*** plugins ***/
/****************************************/
static void plugin_contrast(RESULT * result, RESULT * arg1)
{
double contrast;
contrast = drv_pLG_contrast(R2N(arg1));
SetResult(&result, R_NUMBER, &contrast);
}
static void plugin_backlight(RESULT * result, RESULT * arg1)
{
double backlight;
backlight = drv_pLG_backlight(R2N(arg1));
SetResult(&result, R_NUMBER, &backlight);
}
static void plugin_gpo(RESULT * result, RESULT * argv[])
{
double gpo;
gpo = drv_pLG_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_pLG_list(void)
{
printf("picoLCD 256x64 Graphic LCD");
return 0;
}
/* initialize driver & display */
int drv_pLG_init(const char *section, const int quiet)
{
int ret;
info("%s: %s", Name, "$Rev$");
info("PICOLCD Graphic initialization\n");
/* display preferences */
XRES = 6; /* pixel width of one char */
YRES = 8; /* pixel height of one char */
GPOS = 8;
GPIS = 1;
/* real worker functions */
drv_generic_graphic_real_blit = drv_pLG_blit;
drv_generic_gpio_real_set = drv_pLG_gpo;
drv_generic_gpio_real_get = drv_pLG_gpi;
/* start display */
if ((ret = drv_pLG_start(section, quiet)) != 0)
return ret;
/* initialize generic graphic driver */
if ((ret = drv_generic_graphic_init(section, Name)) != 0)
return ret;
/* GPO's init */
if ((ret = drv_generic_gpio_init(section, Name)) != 0)
return ret;
/* 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_pLG_quit(const int quiet)
{
info("%s: shutting down.", Name);
drv_generic_graphic_quit();
/* clear display */
drv_pLG_clear();
/* say goodbye... */
if (!quiet) {
drv_generic_graphic_greet("goodbye!", NULL);
}
drv_pLG_close();
if (Buffer) {
free(Buffer);
BufPtr = NULL;
}
return (0);
}
DRIVER drv_picoLCDGraphic = {
.name = Name,
.list = drv_pLG_list,
.init = drv_pLG_init,
.quit = drv_pLG_quit,
};
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