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-/* Name: set-led.c
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- * Project: custom-class, a basic USB example
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- * Author: Christian Starkjohann
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- * Creation Date: 2008-04-10
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- * Tabsize: 4
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- * Copyright: (c) 2008 by OBJECTIVE DEVELOPMENT Software GmbH
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- * License: GNU GPL v2 (see License.txt), GNU GPL v3 or proprietary (CommercialLicense.txt)
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- * This Revision: $Id: set-led.c 692 2008-11-07 15:07:40Z cs $
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- */
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-
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-/*
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-General Description:
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-This is the host-side driver for the custom-class example device. It searches
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-the USB for the LEDControl device and sends the requests understood by this
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-device.
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-This program must be linked with libusb on Unix and libusb-win32 on Windows.
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-See http://libusb.sourceforge.net/ or http://libusb-win32.sourceforge.net/
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-respectively.
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-*/
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-
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-#include <stdio.h>
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-#include <stdlib.h>
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-#include <string.h>
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-#include <usb.h> /* this is libusb */
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-#include "opendevice.h" /* common code moved to separate module */
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-
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-#include "../requests.h" /* custom request numbers */
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-#include "../usbconfig.h" /* device's VID/PID and names */
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-
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-static void usage(char *name)
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-{
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- fprintf(stderr, "usage:\n");
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- fprintf(stderr, " %s on ....... turn on LED\n", name);
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- fprintf(stderr, " %s off ...... turn off LED\n", name);
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- fprintf(stderr, " %s status ... ask current status of LED\n", name);
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-#if ENABLE_TEST
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- fprintf(stderr, " %s test ..... run driver reliability test\n", name);
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-#endif /* ENABLE_TEST */
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-}
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-
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-int main(int argc, char **argv)
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-{
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-usb_dev_handle *handle = NULL;
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-const unsigned char rawVid[2] = {USB_CFG_VENDOR_ID}, rawPid[2] = {USB_CFG_DEVICE_ID};
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-char vendor[] = {USB_CFG_VENDOR_NAME, 0}, product[] = {USB_CFG_DEVICE_NAME, 0};
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-char buffer[4];
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-int cnt, vid, pid, isOn;
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-
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- usb_init();
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- if(argc < 2){ /* we need at least one argument */
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- usage(argv[0]);
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- exit(1);
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- }
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- /* compute VID/PID from usbconfig.h so that there is a central source of information */
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- vid = rawVid[1] * 256 + rawVid[0];
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- pid = rawPid[1] * 256 + rawPid[0];
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- /* The following function is in opendevice.c: */
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- if(usbOpenDevice(&handle, vid, vendor, pid, product, NULL, NULL, NULL) != 0){
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- fprintf(stderr, "Could not find USB device \"%s\" with vid=0x%x pid=0x%x\n", product, vid, pid);
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- exit(1);
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- }
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- /* Since we use only control endpoint 0, we don't need to choose a
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- * configuration and interface. Reading device descriptor and setting a
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- * configuration and interface is done through endpoint 0 after all.
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- * However, newer versions of Linux require that we claim an interface
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- * even for endpoint 0. Enable the following code if your operating system
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- * needs it: */
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-#if 0
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- int retries = 1, usbConfiguration = 1, usbInterface = 0;
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- if(usb_set_configuration(handle, usbConfiguration) && showWarnings){
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- fprintf(stderr, "Warning: could not set configuration: %s\n", usb_strerror());
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- }
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- /* now try to claim the interface and detach the kernel HID driver on
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- * Linux and other operating systems which support the call. */
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- while((len = usb_claim_interface(handle, usbInterface)) != 0 && retries-- > 0){
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-#ifdef LIBUSB_HAS_DETACH_KERNEL_DRIVER_NP
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- if(usb_detach_kernel_driver_np(handle, 0) < 0 && showWarnings){
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- fprintf(stderr, "Warning: could not detach kernel driver: %s\n", usb_strerror());
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- }
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-#endif
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- }
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-#endif
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-
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- if(strcasecmp(argv[1], "status") == 0){
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- cnt = usb_control_msg(handle, USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_ENDPOINT_IN, CUSTOM_RQ_GET_STATUS, 0, 0, buffer, sizeof(buffer), 5000);
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- if(cnt < 1){
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- if(cnt < 0){
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- fprintf(stderr, "USB error: %s\n", usb_strerror());
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- }else{
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- fprintf(stderr, "only %d bytes received.\n", cnt);
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- }
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- }else{
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- printf("LED is %s\n", buffer[0] ? "on" : "off");
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- }
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- }else if((isOn = (strcasecmp(argv[1], "on") == 0)) || strcasecmp(argv[1], "off") == 0){
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- cnt = usb_control_msg(handle, USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_ENDPOINT_OUT, CUSTOM_RQ_SET_STATUS, isOn, 0, buffer, 0, 5000);
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- if(cnt < 0){
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- fprintf(stderr, "USB error: %s\n", usb_strerror());
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- }
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-#if ENABLE_TEST
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- }else if(strcasecmp(argv[1], "test") == 0){
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- int i;
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- srandomdev();
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- for(i = 0; i < 50000; i++){
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- int value = random() & 0xffff, index = random() & 0xffff;
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- int rxValue, rxIndex;
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- if((i+1) % 100 == 0){
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- fprintf(stderr, "\r%05d", i+1);
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- fflush(stderr);
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- }
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- cnt = usb_control_msg(handle, USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_ENDPOINT_IN, CUSTOM_RQ_ECHO, value, index, buffer, sizeof(buffer), 5000);
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- if(cnt < 0){
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- fprintf(stderr, "\nUSB error in iteration %d: %s\n", i, usb_strerror());
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- break;
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- }else if(cnt != 4){
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- fprintf(stderr, "\nerror in iteration %d: %d bytes received instead of 4\n", i, cnt);
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- break;
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- }
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- rxValue = ((int)buffer[0] & 0xff) | (((int)buffer[1] & 0xff) << 8);
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- rxIndex = ((int)buffer[2] & 0xff) | (((int)buffer[3] & 0xff) << 8);
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- if(rxValue != value || rxIndex != index){
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- fprintf(stderr, "\ndata error in iteration %d:\n", i);
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- fprintf(stderr, "rxValue = 0x%04x value = 0x%04x\n", rxValue, value);
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- fprintf(stderr, "rxIndex = 0x%04x index = 0x%04x\n", rxIndex, index);
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- }
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- }
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- fprintf(stderr, "\nTest completed.\n");
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-#endif /* ENABLE_TEST */
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- }else{
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- usage(argv[0]);
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- exit(1);
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- }
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- usb_close(handle);
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- return 0;
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-}
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