adding PICGraphic driver

git-svn-id: https://ssl.bulix.org/svn/lcd4linux/trunk@1049 3ae390bd-cb1e-0410-b409-cd5a39f66f1f

1 files changed, 427 insertions, 0 deletions

diff --git a/drv_PICGraphic.c b/drv_PICGraphic.c
new file mode 100644
index 0000000..1dda772
--- /dev/null
+++ b/drv_PICGraphic.c
@@ -0,0 +1,427 @@
+/* $Id$
+ * $URL$
+ *
+ * PICGraphic lcd4linux driver
+ *
+ * Copyright (C) 2009 Peter Bailey <peter.eldridge.bailey@gmail.com>
+ * Copyright (C) 2005 Michael Reinelt <michael@reinelt.co.at>
+ * Copyright (C) 2005, 2006, 2007 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_PICGraphic
+ *
+ */
+
+#include "config.h"
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <unistd.h>
+#include <string.h>
+#include <strings.h>
+#include <errno.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 "timer.h"
+
+#include "drv_generic_graphic.h"
+#include "drv_generic_gpio.h"
+#include "drv_generic_serial.h"
+
+#define min(a,b) (a < b ? a : b)
+
+static char Name[] = "PICGraphic";
+
+//#define partialFrame
+
+/* example config:
+
+Display PICGraphic {
+    Driver    'PICGraphic'
+    Port      '/dev/ttyS1'
+    Contrast  8
+# these could be automatic
+    Size      '48x128'
+    Speed     115200
+    Font      '6x8'
+}
+
+*/
+
+/*
+typedef struct {
+    char *name;
+    int columns;
+    int rows;
+    int max_contrast;
+    int default_contrast;
+    int gpo;
+    int protocol;
+} MODEL;
+*/
+
+static char *fbPG = 0, delayDone = 0;
+
+void drv_PICGraphic_1s(void *arg)
+{
+    delayDone = 1;
+    info("delay done");
+}
+
+
+/****************************************/
+/***  hardware-dependent functions    ***/
+/****************************************/
+static int drv_PICGraphic_open(const char *section)
+{
+    /* open serial port */
+    if (drv_generic_serial_open(section, Name, 0) < 0)
+	return -1;
+
+    return 0;
+}
+
+
+static int drv_PICGraphic_close(void)
+{
+    /* close opened serial port */
+    return drv_generic_serial_close();
+}
+
+static void convert2ASCII(char input, char * output)
+{
+	unsigned char temp = input >> 4;
+	if(temp < 10)
+		output[0] = temp + '0';
+	else
+		output[0] = temp - 10 + 'a';
+	input &= 0xf;
+	if(input < 10)
+		output[1] = input + '0';
+	else
+		output[1] = input - 10 + 'a';
+}
+
+
+static void drv_PICGraphic_send(const char *data, const unsigned int len)
+{
+    unsigned int i;
+    char hexDigits[3];
+    hexDigits[2] = 0;
+    drv_generic_serial_write(data, len);
+    info("sending %d bytes: ", len);
+    for(i = 0; i < len; i++){ // min(10, len)
+    	convert2ASCII(data[i], hexDigits);
+    	info("0x%s (%c)", hexDigits, data[i]);
+    }
+}
+
+static void drv_PICGraphic_blit(const int row, const int col, const int height, const int width)
+{
+    /* update a rectangular portion of the display */
+    int r, c, index;
+    unsigned char cmd[5];
+
+    info("blit from (%d,%d) to (%d,%d) out of (%d,%d)", row, col, row + height, col + width, DROWS, DCOLS);
+    if (!fbPG)
+	return;
+    for (c = min(col, DCOLS - 1); c < min(col + width, DCOLS); c++) {
+	for (r = min(row, DROWS - 1); r < min(row + height, DROWS); r++) {
+	    index = DCOLS * (r / 8) + c;
+	    if (index < 0 || index >= DCOLS * DROWS / 8) {
+		error("index too large: %d, r: %d, c: %d", index, r, c);
+		break;
+	    }
+	    if (drv_generic_graphic_black(r, c)) {
+		fbPG[index] |= (1 << (r % 8));
+	    } else {
+		fbPG[index] &= ~(1 << (r % 8));
+	    }
+	}
+    }
+
+    // send rectangular portion with height divisible by 8
+#ifdef partialFrame
+    if (delayDone) {
+	delayDone = 0;
+	int row8, height8;
+	row8 = 8*(row/8);
+	height8 = 8*(height/8) + !!(height % 8);
+	info("sending blit");
+	cmd[0] = 'b';
+	cmd[1] = row8;
+	cmd[2] = col;
+	cmd[3] = height8;
+	cmd[4] = width;
+	drv_PICGraphic_send(cmd, 5);
+	for (r = min(row8, DROWS - 1); r < min(row8 + height8, DROWS); r+=8) {
+		drv_PICGraphic_send(fbPG+DCOLS * (r / 8) + col, width);
+	}
+    }
+#else
+    // send full frame
+    if (delayDone) {
+	delayDone = 0;
+	info("sending frame");
+	cmd[0] = 'f';
+	drv_PICGraphic_send(cmd, 1);
+	drv_PICGraphic_send(fbPG, DROWS * DCOLS / 8);
+    }
+#endif
+}
+
+static int drv_PICGraphic_GPO(const int num, const int val)
+{
+    char cmd[3];
+
+    cmd[0] = 'g';
+    cmd[1] = val ? 's' : 'c';
+    cmd[2] = num;
+
+    // todo: fixme
+//    drv_PICGraphic_send(cmd, 3);
+
+    return 0;
+}
+
+static int drv_PICGraphic_GPI(const int num)
+{
+    char cmd[3];
+    int ret = 0;
+
+    cmd[0] = 'g';
+    cmd[1] = 'r';
+    cmd[2] = num;
+
+    // todo: fixme
+//    drv_PICGraphic_send(cmd, 3);
+//    ret = drv_generic_serial_read(cmd, 1);
+
+    if (ret)
+	return -1;
+    else
+	return cmd[0];
+}
+
+/* example function used in a plugin */
+static int drv_PICGraphic_contrast(int contrast)
+{
+    char cmd[2];
+
+    /* adjust limits according to the display */
+    if (contrast < 0)
+	contrast = 0;
+    if (contrast > 15)
+	contrast = 15;
+
+    /* call a 'contrast' function */
+    cmd[0] = 'c';
+    cmd[1] = contrast;
+    // todo: fixme
+//    drv_PICGraphic_send(cmd, 2);
+
+    return contrast;
+}
+
+/* start graphic display */
+static int drv_PICGraphic_start2(const char *section)
+{
+    char *s;
+    char cmd[1];
+    int contrast;
+
+    /* read display size from config */
+    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;
+    }
+
+    DROWS = -1;
+    DCOLS = -1;
+    if (sscanf(s, "%dx%d", &DCOLS, &DROWS) != 2 || DCOLS < 1 || DROWS < 1) {
+	error("%s: bad Size '%s' from %s", Name, s, cfg_source());
+	return -1;
+    }
+
+    s = cfg_get(section, "Font", "6x8");
+    if (s == NULL || *s == '\0') {
+	error("%s: no '%s.Font' entry from %s", Name, section, cfg_source());
+	return -1;
+    }
+
+    XRES = -1;
+    YRES = -1;
+    if (sscanf(s, "%dx%d", &XRES, &YRES) != 2 || XRES < 1 || YRES < 1) {
+	error("%s: bad Font '%s' from %s", Name, s, cfg_source());
+	return -1;
+    }
+
+    if (XRES != 6 && YRES != 8) {
+	error("%s: bad Font '%s' from %s (only 6x8 at the moment)", Name, s, cfg_source());
+	return -1;
+    }
+
+    /* you surely want to allocate a framebuffer or something... */
+    fbPG = calloc(DCOLS * DROWS / 8, 1);
+    if (!fbPG) {
+	error("failed to allocate framebuffer");
+	return -1;
+    }
+
+    info("allocated framebuffer with size %d", DCOLS * DROWS / 8);
+
+    timer_add(drv_PICGraphic_1s, 0, 500, 0);	// 1s
+
+    /* open communication with the display */
+    if (drv_PICGraphic_open(section) < 0) {
+	return -1;
+    }
+
+    /* reset & initialize display */
+    cmd[0] = 'i';
+    drv_PICGraphic_send(cmd, 1);
+
+    if (cfg_number(section, "Contrast", 8, 0, 15, &contrast) > 0) {
+	drv_PICGraphic_contrast(contrast);
+    }
+
+    return 0;
+}
+
+
+/****************************************/
+/***            plugins               ***/
+/****************************************/
+
+static void plugin_contrast(RESULT * result, RESULT * arg1)
+{
+    double contrast;
+
+    contrast = drv_PICGraphic_contrast(R2N(arg1));
+    SetResult(&result, R_NUMBER, &contrast);
+}
+
+
+/****************************************/
+/***        widget callbacks          ***/
+/****************************************/
+
+
+/* using drv_generic_text_draw(W) */
+/* using drv_generic_text_icon_draw(W) */
+/* using drv_generic_text_bar_draw(W) */
+/* using drv_generic_gpio_draw(W) */
+
+
+/****************************************/
+/***        exported functions        ***/
+/****************************************/
+
+
+/* list models */
+int drv_PICGraphic_list(void)
+{
+    printf("PICGraphic serial-to-graphic by Peter Bailey");
+    return 0;
+}
+
+/* initialize driver & display */
+int drv_PICGraphic_init2(const char *section, const int quiet)
+{
+    int ret;
+
+    /* real worker functions */
+    drv_generic_graphic_real_blit = drv_PICGraphic_blit;
+    drv_generic_gpio_real_set = drv_PICGraphic_GPO;
+    drv_generic_gpio_real_get = drv_PICGraphic_GPI;
+
+    /* start display */
+    if ((ret = drv_PICGraphic_start2(section)) != 0)
+	return ret;
+
+    /* initialize generic graphic driver */
+    if ((ret = drv_generic_graphic_init(section, Name)) != 0)
+	return ret;
+
+    if (!quiet) {
+	char buffer[40];
+	qprintf(buffer, sizeof(buffer), "%s %dx%d", Name, DCOLS, DROWS);
+	if (drv_generic_graphic_greet(buffer, NULL)) {
+	    sleep(3);
+	    drv_generic_graphic_clear();	// also clears main framebuffer
+	}
+    }
+
+    /* register plugins */
+    AddFunction("LCD::contrast", 1, plugin_contrast);
+
+    return 0;
+}
+
+/* close driver & display */
+/* use this function for a graphic display */
+int drv_PICGraphic_quit2(const int quiet)
+{
+
+    info("%s: shutting down.", Name);
+
+    /* clear display */
+    drv_generic_graphic_clear();
+
+    drv_generic_gpio_quit();
+
+
+    /* say goodbye... */
+    if (!quiet) {
+	drv_generic_graphic_greet("goodbye!", NULL);
+    }
+
+    info("freeing framebuffer");
+    free(fbPG);
+
+    drv_generic_graphic_quit();
+
+    debug("closing connection");
+    drv_PICGraphic_close();
+
+    return (0);
+}
+
+/* use this one for a graphic display */
+DRIVER drv_PICGraphic = {
+    .name = Name,
+    .list = drv_PICGraphic_list,
+    .init = drv_PICGraphic_init2,
+    .quit = drv_PICGraphic_quit2,
+};