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