aboutsummaryrefslogtreecommitdiffstats
path: root/dvb-t/uk-Ferryside
diff options
context:
space:
mode:
Diffstat (limited to 'dvb-t/uk-Ferryside')
0 files changed, 0 insertions, 0 deletions
'>77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726
/* $Id: drv_dpf.c 980 2009-01-28 21:18:52Z michux $
 * $URL: https://ssl.bulix.org/svn/lcd4linux/trunk/drv_dpf.c $
 *
 * Driver for hacked digital picture frames. Uses *NO* external libraries.
 * See http://dpf-ax.sourceforge.net/ for more information.
 *
 * Copyright (C) 2008 Jeroen Domburg <picframe@spritesmods.com>
 * Modified from sample code by:
 * Copyright (C) 2005 Michael Reinelt <michael@reinelt.co.at>
 * Copyright (C) 2005, 2006, 2007 The LCD4Linux Team <lcd4linux-devel@users.sourceforge.net>
 * 
 * Mods by <hackfin@section5.ch>
 * Complete rewrite 05/2013 by superelchi <superelchi AT wolke7.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_DPF
 *
 */

#include "config.h"

#include <stdlib.h>
#include <stdio.h>
#include <unistd.h>
#include <string.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 "drv_generic_graphic.h"

//###################################################################
// Start dpfcore4driver.h
// See http://dpf-ax.sourceforge.net/
//###################################################################

#define DPFAXHANDLE void *	// Handle needed for dpf_ax access
#define DPF_BPP 2		//bpp for dfp-ax is currently always 2!

/**
 * Open DPF device.
 * 
 * Device must be string in the form "usbX" or "dpfX", with X = 0 .. number of connected dpfs.
 * The open function will scan the USB bus and return a handle to access dpf #X.
 * If dpf #X is not found, returns NULL.
 *
 * \param dev	device name to open
 * \return		device handle or NULL
 */
DPFAXHANDLE dpf_ax_open(const char *device);

/**
 *  Close DPF device.
 */
void dpf_ax_close(DPFAXHANDLE h);

/** Blit data to screen.
 *
 * \param buf     buffer to 16 bpp RGB 565 image data
 * \param rect    rectangle tuple: [x0, y0, x1, y1]
 */
void dpf_ax_screen_blit(DPFAXHANDLE h, const unsigned char *buf, short rect[4]);

/** Set backlight brightness.
 * 
 * \param value       Backlight value 0..7 (0 = off, 7 = max brightness)
 */
void dpf_ax_setbacklight(DPFAXHANDLE h, int value);

/** Get screen width.
 * 
 * \return width in pixel
 */
int dpf_ax_getwidth(DPFAXHANDLE h);

/** Get screen height.
 * 
 * \return height in pixel
 */
int dpf_ax_getheight(DPFAXHANDLE h);

//###################################################################
// End dpfcore4driver.h
//###################################################################


static char Name[] = "DPF";


/*
 * Dpf status
 */
static struct {
    unsigned char *lcdBuf;	// Display data buffer
    unsigned char *xferBuf;	// USB transfer buffer
    DPFAXHANDLE dpfh;		// Handle for dpf access
    int pwidth;			// Physical display width
    int pheight;		// Physical display height

    // Flags to translate logical to physical orientation
    int isPortrait;
    int rotate90;
    int flip;

    // Current dirty rectangle
    int minx, maxx;
    int miny, maxy;

    // Config properties
    int orientation;
    int backlight;
} dpf;


// Convert RGBA pixel to RGB565 pixel(s)

#define _RGB565_0(p) (( ((p.R) & 0xf8)      ) | (((p.G) & 0xe0) >> 5))
#define _RGB565_1(p) (( ((p.G) & 0x1c) << 3 ) | (((p.B) & 0xf8) >> 3))

/*
 * Set one pixel in lcdBuf.
 * 
 * Respects orientation and updates dirty rectangle.
 *
 * in:	x, y - pixel coordinates
 * 	pix  - RGBA pixel value
 * out:	-
 */
static void drv_set_pixel(int x, int y, RGBA pix)
{
    int changed = 0;

    int sx = DCOLS;
    int sy = DROWS;
    int lx = x % sx;
    int ly = y % sy;

    if (dpf.flip) {
	// upside down orientation
	lx = DCOLS - 1 - lx;
	ly = DROWS - 1 - ly;
    }

    if (dpf.rotate90) {
	// wrong Orientation, rotate
	int i = ly;
	ly = dpf.pheight - 1 - lx;
	lx = i;
    }

    if (lx < 0 || lx >= (int) dpf.pwidth || ly < 0 || ly >= (int) dpf.pheight) {
	error("dpf: x/y out of bounds (x=%d, y=%d, rot=%d, flip=%d, lx=%d, ly=%d)\n", x, y, dpf.rotate90, dpf.flip, lx,
	      ly);
	return;
    }

    unsigned char c1 = _RGB565_0(pix);
    unsigned char c2 = _RGB565_1(pix);
    unsigned int i = (ly * dpf.pwidth + lx) * DPF_BPP;
    if (dpf.lcdBuf[i] != c1 || dpf.lcdBuf[i + 1] != c2) {
	dpf.lcdBuf[i] = c1;
	dpf.lcdBuf[i + 1] = c2;
	changed = 1;
    }

    if (changed) {
	if (lx < dpf.minx)
	    dpf.minx = lx;
	if (lx > dpf.maxx)
	    dpf.maxx = lx;
	if (ly < dpf.miny)
	    dpf.miny = ly;
	if (ly > dpf.maxy)
	    dpf.maxy = ly;
    }
}

/*
 * Send pixel data to dpf
 */
static void drv_dpf_blit(const int row, const int col, const int height, const int width)
{
    int x, y;

    // Set pixels one by one
    // Note: here is room for optimization :-)
    for (y = row; y < row + height; y++)
	for (x = col; x < col + width; x++)
	    drv_set_pixel(x, y, drv_generic_graphic_rgb(y, x));

    // If nothing has changed, skip transfer
    if (dpf.minx > dpf.maxx || dpf.miny > dpf.maxy)
	return;

    // Copy data in dirty rectangle from data buffer to temp transfer buffer
    unsigned int cpylength = (dpf.maxx - dpf.minx + 1) * DPF_BPP;
    unsigned char *ps = dpf.lcdBuf + (dpf.miny * dpf.pwidth + dpf.minx) * DPF_BPP;
    unsigned char *pd = dpf.xferBuf;
    for (y = dpf.miny; y <= dpf.maxy; y++) {
	memcpy(pd, ps, cpylength);
	ps += dpf.pwidth * DPF_BPP;
	pd += cpylength;
    }

    // Send the buffer
    short rect[4];
    rect[0] = dpf.minx;
    rect[1] = dpf.miny;
    rect[2] = dpf.maxx + 1;
    rect[3] = dpf.maxy + 1;
    dpf_ax_screen_blit(dpf.dpfh, dpf.xferBuf, rect);

    // Reset dirty rectangle
    dpf.minx = dpf.pwidth - 1;
    dpf.maxx = 0;
    dpf.miny = dpf.pheight - 1;
    dpf.maxy = 0;
}


/* start graphic display */
static int drv_dpf_start(const char *section)
{
    int i;
    char *dev;
    char *s;

    // Check if config is valid

    // Get the device
    dev = cfg_get(section, "Port", NULL);
    if (dev == NULL || *dev == '\0') {
	error("dpf: no '%s.Port' entry from %s", section, cfg_source());
	return -1;
    }
    // Get font
    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;
    }

    /* we dont want fonts below 6 width */
    if (XRES < 6) {
	error("%s: bad Font '%s' width '%d' using minimum of 6)", Name, s, XRES);
	XRES = 6;
    }

    /* we dont want fonts below 8 height */
    if (YRES < 8) {
	error("%s: bad Font '%s' height '%d' using minimum of 8)", Name, s, YRES);
	YRES = 8;
    }
    // Get the logical orientation (0 = landscape, 1 = portrait, 2 = reverse landscape, 3 = reverse portrait)
    if (cfg_number(section, "Orientation", 0, 0, 3, &i) > 0)
	dpf.orientation = i;
    else
	dpf.orientation = 0;

    // Get the backlight value (0 = off, 7 = max brightness)
    if (cfg_number(section, "Backlight", 0, 0, 7, &i) > 0)
	dpf.backlight = i;
    else
	dpf.backlight = 7;

    /* open communication with the display */
    dpf.dpfh = dpf_ax_open(dev);
    if (dpf.dpfh == NULL) {
	error("dpf: cannot open dpf device %s", dev);
	return -1;
    }
    // Get dpfs physical dimensions
    dpf.pwidth = dpf_ax_getwidth(dpf.dpfh);
    dpf.pheight = dpf_ax_getheight(dpf.dpfh);


    // See, if we have to rotate the display
    dpf.isPortrait = dpf.pwidth < dpf.pheight;
    if (dpf.isPortrait) {
	if (dpf.orientation == 0 || dpf.orientation == 2)
	    dpf.rotate90 = 1;
    } else if (dpf.orientation == 1 || dpf.orientation == 3)
	dpf.rotate90 = 1;
    dpf.flip = (!dpf.isPortrait && dpf.rotate90);	// adjust to make rotate por/land = physical por/land
    if (dpf.orientation > 1)
	dpf.flip = !dpf.flip;

    // allocate display buffer + temp transfer buffer
    dpf.lcdBuf = malloc(dpf.pwidth * dpf.pheight * DPF_BPP);
    dpf.xferBuf = malloc(dpf.pwidth * dpf.pheight * DPF_BPP);

    // clear display buffer + set it to "dirty"
    memset(dpf.lcdBuf, 0, dpf.pwidth * dpf.pheight * DPF_BPP);	//Black
    dpf.minx = 0;
    dpf.maxx = dpf.pwidth - 1;
    dpf.miny = 0;
    dpf.maxy = dpf.pheight - 1;

    // set the logical width/height for lcd4linux
    DCOLS = ((!dpf.rotate90) ? dpf.pwidth : dpf.pheight);
    DROWS = ((!dpf.rotate90) ? dpf.pheight : dpf.pwidth);

    // Set backlight (brightness)
    dpf_ax_setbacklight(dpf.dpfh, dpf.backlight);

    return 0;
}


/****************************************/
/***            plugins               ***/
/****************************************/

static void plugin_backlight(RESULT * result, RESULT * arg1)
{
    int b = R2N(arg1);
    if (b < 0)
	b = 0;
    if (b > 7)
	b = 7;

    dpf_ax_setbacklight(dpf.dpfh, b);
    SetResult(&result, R_NUMBER, &b);
}


/****************************************/
/***        exported functions        ***/
/****************************************/


/* list models */
int drv_dpf_list(void)
{
    printf("Hacked dpf-ax digital photo frame");
    return 0;
}


/* initialize driver & display */
int drv_dpf_init(const char *section, const int quiet)
{
    int ret;

    /* real worker functions */
    drv_generic_graphic_real_blit = drv_dpf_blit;

    /* start display */
    if ((ret = drv_dpf_start(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();
	}
    }

    /* register plugins */
    AddFunction("LCD::backlight", 1, plugin_backlight);

    return 0;
}


/* close driver & display */
int drv_dpf_quit(const int quiet)
{
    info("%s: shutting down.", Name);

    /* clear display */
    drv_generic_graphic_clear();

    /* say goodbye... */
    if (!quiet) {
	drv_generic_graphic_greet("goodbye!", NULL);
    }

    drv_generic_graphic_quit();

    debug("closing connection");
    dpf_ax_close(dpf.dpfh);

    return (0);
}


DRIVER drv_DPF = {
    .name = Name,
    .list = drv_dpf_list,
    .init = drv_dpf_init,
    .quit = drv_dpf_quit,
};

//###################################################################
// Start dpfcore4driver.c
// See http://dpf-ax.sourceforge.net/
//###################################################################

#include <usb.h>

#define AX206_VID 0x1908	// Hacked frames USB Vendor ID
#define AX206_PID 0x0102	// Hacked frames USB Product ID

#define USBCMD_SETPROPERTY  0x01	// USB command: Set property
#define USBCMD_BLIT         0x12	// USB command: Blit to screen

/* Generic SCSI device stuff */

#define DIR_IN  0
#define DIR_OUT 1

/* The DPF context structure */
typedef
    struct dpf_context {
    usb_dev_handle *udev;
    unsigned int width;
    unsigned int height;
} DPFContext;

static int wrap_scsi(DPFContext * h, unsigned char *cmd, int cmdlen, char out,
		     unsigned char *data, unsigned long block_len);

/**
 * Open DPF device.
 * 
 * Device must be string in the form "usbX" or "dpfX", with X = 0 .. number of connected dpfs.
 * The open function will scan the USB bus and return a handle to access dpf #X.
 * If dpf #X is not found, returns NULL.
 *
 * \param dev	device name to open
 * \return		device handle or NULL
 */
DPFAXHANDLE dpf_ax_open(const char *dev)
{
    DPFContext *dpf;
    int index = -1;
    usb_dev_handle *u;

    if (dev && strlen(dev) == 4 && (strncmp(dev, "usb", 3) == 0 || strncmp(dev, "dpf", 3) == 0))
	index = dev[3] - '0';

    if (index < 0 || index > 9) {
	fprintf(stderr, "dpf_ax_open: wrong device '%s'. Please specify a string like 'usb0'\n", dev);
	return NULL;
    }

    usb_init();
    usb_find_busses();
    usb_find_devices();

    struct usb_bus *b = usb_get_busses();
    struct usb_device *d = NULL;
    int enumeration = 0;
    int found = 0;

    while (b && !found) {
	d = b->devices;
	while (d) {
	    if ((d->descriptor.idVendor == AX206_VID) && (d->descriptor.idProduct == AX206_PID)) {
		fprintf(stderr, "dpf_ax_open: found AX206 #%d\n", enumeration + 1);
		if (enumeration == index) {
		    found = 1;
		    break;
		} else
		    enumeration++;
	    }
	    d = d->next;
	}
	b = b->next;
    }

    if (!d) {
	fprintf(stderr, "dpf_ax_open: no matching USB device '%s' found!\n", dev);
	return NULL;
    }

    dpf = (DPFContext *) malloc(sizeof(DPFContext));
    if (!dpf) {
	fprintf(stderr, "dpf_ax_open: error allocation memory.\n");
	return NULL;
    }

    u = usb_open(d);
    if (u == NULL) {
	fprintf(stderr, "dpf_ax_open: failed to open usb device '%s'!\n", dev);
	free(dpf);
	return NULL;
    }

    if (usb_claim_interface(u, 0) < 0) {
	fprintf(stderr, "dpf_ax_open: failed to claim usb device!\n");
	usb_close(u);
	free(dpf);
	return NULL;
    }

    dpf->udev = u;

    static unsigned char buf[5];
    static unsigned char cmd[16] = {
	0xcd, 0, 0, 0,
	0, 2, 0, 0,
	0, 0, 0, 0,
	0, 0, 0, 0
    };
    cmd[5] = 2;			// get LCD parameters
    if (wrap_scsi(dpf, cmd, sizeof(cmd), DIR_IN, buf, 5) == 0) {
	dpf->width = (buf[0]) | (buf[1] << 8);
	dpf->height = (buf[2]) | (buf[3] << 8);
	fprintf(stderr, "dpf_ax_open: got LCD dimensions: %dx%d\n", dpf->width, dpf->height);
    } else {
	fprintf(stderr, "dpf_ax_open: error reading LCD dimensions!\n");
	dpf_ax_close(dpf);
	return NULL;
    }
    return (DPFAXHANDLE) dpf;
}

/**
 *  Close DPF device
 */

void dpf_ax_close(DPFAXHANDLE h)
{
    DPFContext *dpf = (DPFContext *) h;

    usb_release_interface(dpf->udev, 0);
    usb_close(dpf->udev);
    free(dpf);
}

/** Get screen width.
 * 
 * \return width in pixel
 */
int dpf_ax_getwidth(DPFAXHANDLE h)
{
    return ((DPFContext *) h)->width;
}

/** Get screen height.
 * 
 * \return height in pixel
 */
int dpf_ax_getheight(DPFAXHANDLE h)
{
    return ((DPFContext *) h)->height;
}

static
unsigned char g_excmd[16] = {
    0xcd, 0, 0, 0,
    0, 6, 0, 0,
    0, 0, 0, 0,
    0, 0, 0, 0
};

/** Blit data to screen.
 *
 * \param buf     buffer to 16 bpp RGB 565 image data
 * \param rect    rectangle tuple: [x0, y0, x1, y1]
 */
void dpf_ax_screen_blit(DPFAXHANDLE h, const unsigned char *buf, short rect[4])
{
    unsigned long len = (rect[2] - rect[0]) * (rect[3] - rect[1]);
    len <<= 1;
    unsigned char *cmd = g_excmd;

    cmd[6] = USBCMD_BLIT;
    cmd[7] = rect[0];
    cmd[8] = rect[0] >> 8;
    cmd[9] = rect[1];
    cmd[10] = rect[1] >> 8;
    cmd[11] = rect[2] - 1;
    cmd[12] = (rect[2] - 1) >> 8;
    cmd[13] = rect[3] - 1;
    cmd[14] = (rect[3] - 1) >> 8;
    cmd[15] = 0;

    wrap_scsi((DPFContext *) h, cmd, sizeof(g_excmd), DIR_OUT, (unsigned char *) buf, len);
}

/** Set backlight
 * 
 * \param value       Backlight value 0..7 (0 = off, 7 = max brightness)
 */
void dpf_ax_setbacklight(DPFAXHANDLE h, int b)
{
    unsigned char *cmd = g_excmd;

    if (b < 0)
	b = 0;
    if (b > 7)
	b = 7;

    cmd[6] = USBCMD_SETPROPERTY;
    cmd[7] = 0x01;		// PROPERTY_BRIGHTNESS
    cmd[8] = 0x00;		//PROPERTY_BRIGHTNESS >> 8;
    cmd[9] = b;
    cmd[10] = b >> 8;

    wrap_scsi((DPFContext *) h, cmd, sizeof(g_excmd), DIR_OUT, NULL, 0);
}


static unsigned char g_buf[] = {
    0x55, 0x53, 0x42, 0x43,	// dCBWSignature
    0xde, 0xad, 0xbe, 0xef,	// dCBWTag
    0x00, 0x80, 0x00, 0x00,	// dCBWLength
    0x00,			// bmCBWFlags: 0x80: data in (dev to host), 0x00: Data out
    0x00,			// bCBWLUN
    0x10,			// bCBWCBLength

    // SCSI cmd:
    0xcd, 0x00, 0x00, 0x00,
    0x00, 0x06, 0x11, 0xf8,
    0x70, 0x00, 0x40, 0x00,
    0x00, 0x00, 0x00, 0x00,
};

#define ENDPT_OUT 1
#define ENDPT_IN 0x81

static int wrap_scsi(DPFContext * h, unsigned char *cmd, int cmdlen, char out,
		     unsigned char *data, unsigned long block_len)
{
    int len;
    int ret;
    static unsigned char ansbuf[13];	// Do not change size.

    g_buf[14] = cmdlen;
    memcpy(&g_buf[15], cmd, cmdlen);

    g_buf[8] = block_len;
    g_buf[9] = block_len >> 8;
    g_buf[10] = block_len >> 16;
    g_buf[11] = block_len >> 24;

    ret = usb_bulk_write(h->udev, ENDPT_OUT, (const char *) g_buf, sizeof(g_buf), 1000);
    if (ret < 0)
	return ret;

    if (out == DIR_OUT) {
	if (data) {
	    ret = usb_bulk_write(h->udev, ENDPT_OUT, (const char *) data, block_len, 3000);
	    if (ret != (int) block_len) {
		fprintf(stderr, "dpf_ax ERROR: bulk write.\n");
		return ret;
	    }
	}
    } else if (data) {
	ret = usb_bulk_read(h->udev, ENDPT_IN, (char *) data, block_len, 4000);
	if (ret != (int) block_len) {
	    fprintf(stderr, "dpf_ax ERROR: bulk read.\n");
	    return ret;
	}
    }
    // get ACK:
    len = sizeof(ansbuf);
    int retry = 0;
    int timeout = 0;
    do {
	timeout = 0;
	ret = usb_bulk_read(h->udev, ENDPT_IN, (char *) ansbuf, len, 5000);
	if (ret != len) {
	    fprintf(stderr, "dpf_ax ERROR: bulk ACK read.\n");
	    timeout = 1;
	}
	retry++;
    } while (timeout && retry < 5);
    if (strncmp((char *) ansbuf, "USBS", 4)) {
	fprintf(stderr, "dpf_ax ERROR: got invalid reply\n.");
	return -1;
    }
    // pass back return code set by peer:
    return ansbuf[12];
}

//###################################################################
// End dpfcore4driver.c
//###################################################################