modified: source/inlprog.c
-moved usb device operations into usb_operations module new file: source/usb_operations.c new file: source/usb_operations.h -creation of usb_operations module -currently handles libusb open/close and retrieving INL retro-prog usb handle.
This commit is contained in:
Paul Molloy
parent
3c09f388ab
commit
782ed343f7
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@ -10,6 +10,8 @@
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//"make debug" to get DEBUG msgs on entire program
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#include "dbg.h"
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#include "usb_operations.h"
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//control transfer request types
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//uint8_t libusb_control_setup::bmRequestType
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//Request type.
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@ -40,112 +42,14 @@
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int main(int argc, char *argv[])
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{
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int rv = 0;
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//context set to NULL since only acting as single user of libusb
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libusb_context *context = NULL;
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libusb_device_handle *rprog_handle = NULL;
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debug("Initalizing libusb");
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//initialize libusb must be called prior to any other libusb function
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//returns 0 on success LIBUSB_ERROR code on failure
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//int libusb_init ( libusb_context ** context)
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int usb_init = libusb_init(&context);
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check( usb_init == LIBUSB_SUCCESS, "Failed to initialize libusb: %s", libusb_strerror(usb_init));
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//void libusb_set_debug ( libusb_context * ctx, int level )
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libusb_set_debug(context, LIBUSB_LOG_LEVEL_ERROR);
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//LIBUSB_LOG_LEVEL_NONE (0) : no messages ever printed by the library (default)
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//LIBUSB_LOG_LEVEL_ERROR (1) : error messages are printed to stderr
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//LIBUSB_LOG_LEVEL_WARNING (2) : warning and error messages are printed to stderr
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//LIBUSB_LOG_LEVEL_INFO (3) : informational messages are printed to stdout,
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// warning and error messages are printed to stderr
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//LIBUSB_LOG_LEVEL_DEBUG (4) : debug and informational messages are printed to stdout,
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// warnings and errors to stderr
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//discover all usb devices
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libusb_device **device_list = NULL;
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//ssize_t libusb_get_device_list (libusb_context *ctx, libusb_device ***list)
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// Returns a list of USB devices currently attached to the system.
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// return value is number of devices plus one as list is null terminated, or LIBUSB_ERROR if negative.
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// Must free device list after done with it
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ssize_t dev_count = libusb_get_device_list( context, &device_list);
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check( dev_count >= 0, "libusb unable to find any devices: %s", libusb_strerror(dev_count));
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ssize_t i = 0;
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libusb_device *retroprog = NULL;
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libusb_device *device = NULL;
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struct libusb_device_descriptor desc;
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libusb_device_handle *handle = NULL;
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unsigned char str[256];
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rprog_handle = open_usb_device( context );
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check_debug(rprog_handle != NULL, "Unable to open INL retro-prog usb device handle.");
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debug("searching %d total devices", dev_count-1);
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for( i=0; i<dev_count; i++) {
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device = device_list[i];
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debug("getting dev desc %d", i);
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rv = libusb_get_device_descriptor( device, &desc);
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check( rv == LIBUSB_SUCCESS, "Unable to get device #%d descriptor: %s", i, libusb_strerror(rv));
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debug("checking %x vendor", desc.idVendor);
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debug("checking %x product", desc.idProduct);
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if ((desc.idVendor == 0x16C0) && (desc.idProduct == 0x05DC)) {
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retroprog = device;
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debug("found vend %x prod %x\n", desc.idVendor, desc.idProduct);
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debug("manf: %d prod: %d\n", desc.iManufacturer, desc.iProduct);
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//opening device allows performing I/O via USB with device
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rv = libusb_open( retroprog, &handle );
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check( rv == LIBUSB_SUCCESS, "Unable to open USB device: %s", libusb_strerror(rv));
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if (desc.iManufacturer) {
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if ( libusb_get_string_descriptor_ascii( handle, desc.iManufacturer, str, sizeof(str) ) > 0) {
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printf("manf_ascii: %s\n",str);
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}
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}
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if (desc.iProduct) {
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if ( libusb_get_string_descriptor_ascii( handle, desc.iProduct, str, sizeof(str) ) > 0) {
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printf("prod_ascii: %s\n",str);
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}
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}
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if (desc.bcdDevice) {
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printf("bcd Device: %d\n",desc.bcdDevice);
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//old firmware returns 256, new returns 512
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//USB_CFG_DEVICE_VERSION 0x00, 0x01 for v1.0, 0x00, 0x02 for v2.0 (minor then major)
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//v2.0 released late 2016 early 2017
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}
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//TODO verify it's INL Retro Prog by InfiniteNesLives.com, then break
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//else close handle and keep searching as there might be other devices with matching prod/devIDs
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//also verify firmware version is compatible
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//
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//TODO verify have permission to interface with device, else give notice to user
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break;
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}
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}
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check( retroprog != NULL, "Could not find INL retro-prog USB device");
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//free device list now that INL retro-prog was found and opened
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//void libusb_free_device_list ( libusb_device ** list, int unref_devices )
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libusb_free_device_list( device_list, 1); //don't completely understand the unref_devices = 1...
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device_list = NULL; //denote that device list is free if end up in error
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//Guess this is what you're supposed to do..
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// the process of opening a device can be viewed as follows:
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//
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// Discover devices using libusb_get_device_list().
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// Choose the device that you want to operate, and call libusb_open().
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// Unref all devices in the discovered device list.
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// Free the discovered device list.
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//
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// The order is important - you must not unreference the device before attempting to open it, because unreferencing it may destroy the device.
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//
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// For convenience, the libusb_free_device_list() function includes a parameter to optionally unreference all the devices in the list before freeing the list itself. This combines steps 3 and 4 above.
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//
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// As an implementation detail, libusb_open() actually adds a reference to the device in question. This is because the device remains available through the handle via libusb_get_device(). The reference is deleted during libusb_close().
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//code and life to axe
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int xfr_cnt = 0;
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uint16_t wValue = 0; //setup packet wValue field
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uint16_t wIndex = 0; //setup packet wIndex field
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@ -205,7 +109,7 @@ int main(int argc, char *argv[])
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switch (action) {
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case 'o': //ON send REQ_LED_ON
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xfr_cnt = libusb_control_transfer(handle,
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xfr_cnt = libusb_control_transfer(rprog_handle,
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LIBUSB_REQUEST_TYPE_VENDOR | LIBUSB_RECIPIENT_DEVICE | LIBUSB_ENDPOINT_IN,
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REQ_LED_ON, wValue, wIndex, (unsigned char *)buffer254, sizeof(buffer254), SEC_5);
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@ -214,7 +118,7 @@ int main(int argc, char *argv[])
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break;
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case 'f':
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xfr_cnt = libusb_control_transfer(handle,
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xfr_cnt = libusb_control_transfer(rprog_handle,
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LIBUSB_REQUEST_TYPE_VENDOR | LIBUSB_RECIPIENT_DEVICE | LIBUSB_ENDPOINT_IN,
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REQ_LED_OFF, wValue, wIndex, (unsigned char *)buffer254, sizeof(buffer254), SEC_5);
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@ -227,46 +131,12 @@ int main(int argc, char *argv[])
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exit(1);
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}
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//free device list if it was left open
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if (device_list) {
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printf("Whoops! freeing device list\n");
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libusb_free_device_list( device_list, 1);
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}
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//must close device before exiting
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libusb_close(handle);
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handle = NULL; //delete handle reference so error won't retry closing
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//deinitialize libusb to be called after closing all devices and before teminating application
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libusb_exit(context);
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close_usb( context, rprog_handle);
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return 0;
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error:
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printf("program went to error\n");
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if (device_list) {
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printf("freeing device list\n");
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libusb_free_device_list( device_list, 1);
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}
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if (handle) {
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printf("closing usb device\n");
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libusb_close(handle);
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}
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if (usb_init == LIBUSB_SUCCESS) {
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printf("deinitializing libusb\n");
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libusb_exit(context);
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}
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if (rv == LIBUSB_ERROR_ACCESS) {
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printf("-------------------------------------------------------\n");
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printf("Denied Permission is expected for initial use on Linux.\n");
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printf("See udev-rule-help/Readme.txt in host dir for help gaining permission.\n");
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printf("Try command with sudo for a cheap temporary solution.\n");
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}
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printf("main program went to error\n");
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return 1;
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@ -0,0 +1,174 @@
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#include <stdio.h>
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#include <string.h>
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#include <stdlib.h>
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#include <assert.h>
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#include <errno.h>
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#include <libusb.h>
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//uncomment to DEBUG this file alone
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//#define DEBUG
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//"make debug" to get DEBUG msgs on entire program
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#include "dbg.h"
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#include "usb_operations.h"
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libusb_device_handle * open_usb_device( libusb_context *context )
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{
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int rv = 0;
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//context set to NULL since only acting as single user of libusb
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//libusb_context *context = NULL;
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//passed in from main
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debug("Initalizing libusb");
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//initialize libusb must be called prior to any other libusb function
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//returns 0 on success LIBUSB_ERROR code on failure
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//int libusb_init ( libusb_context ** context)
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int usb_init = libusb_init(&context);
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check( usb_init == LIBUSB_SUCCESS, "Failed to initialize libusb: %s", libusb_strerror(usb_init));
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//void libusb_set_debug ( libusb_context * ctx, int level )
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libusb_set_debug(context, LIBUSB_LOG_LEVEL_ERROR);
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//LIBUSB_LOG_LEVEL_NONE (0) : no messages ever printed by the library (default)
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//LIBUSB_LOG_LEVEL_ERROR (1) : error messages are printed to stderr
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//LIBUSB_LOG_LEVEL_WARNING (2) : warning and error messages are printed to stderr
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//LIBUSB_LOG_LEVEL_INFO (3) : informational messages are printed to stdout,
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// warning and error messages are printed to stderr
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//LIBUSB_LOG_LEVEL_DEBUG (4) : debug and informational messages are printed to stdout,
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// warnings and errors to stderr
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//discover all usb devices
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libusb_device **device_list = NULL;
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//ssize_t libusb_get_device_list (libusb_context *ctx, libusb_device ***list)
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// Returns a list of USB devices currently attached to the system.
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// return value is number of devices plus one as list is null terminated, or LIBUSB_ERROR if negative.
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// Must free device list after done with it
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ssize_t dev_count = libusb_get_device_list( context, &device_list);
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check( dev_count >= 0, "libusb unable to find any devices: %s", libusb_strerror(dev_count));
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ssize_t i = 0;
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libusb_device *retroprog = NULL;
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libusb_device *device = NULL;
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struct libusb_device_descriptor desc;
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libusb_device_handle *handle = NULL;
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unsigned char str[256];
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debug("searching %d total devices", dev_count-1);
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for( i=0; i<dev_count; i++) {
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device = device_list[i];
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debug("getting dev desc %d", i);
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rv = libusb_get_device_descriptor( device, &desc);
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check( rv == LIBUSB_SUCCESS, "Unable to get device #%d descriptor: %s", i, libusb_strerror(rv));
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debug("checking %x vendor", desc.idVendor);
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debug("checking %x product", desc.idProduct);
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if ((desc.idVendor == 0x16C0) && (desc.idProduct == 0x05DC)) {
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retroprog = device;
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debug("found vend %x prod %x\n", desc.idVendor, desc.idProduct);
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debug("manf: %d prod: %d\n", desc.iManufacturer, desc.iProduct);
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//opening device allows performing I/O via USB with device
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rv = libusb_open( retroprog, &handle );
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check( rv == LIBUSB_SUCCESS, "Unable to open USB device: %s", libusb_strerror(rv));
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if (desc.iManufacturer) {
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if ( libusb_get_string_descriptor_ascii( handle, desc.iManufacturer, str, sizeof(str) ) > 0) {
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debug("manf_ascii: %s\n",str);
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}
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}
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if (desc.iProduct) {
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if ( libusb_get_string_descriptor_ascii( handle, desc.iProduct, str, sizeof(str) ) > 0) {
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debug("prod_ascii: %s\n",str);
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}
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}
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if (desc.bcdDevice) {
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debug("bcd Device: %x\n",desc.bcdDevice);
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//old firmware returns 256, new returns 512
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//old firmware returns 0x100, new returns 0x200
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//USB_CFG_DEVICE_VERSION 0x00, 0x01 for v1.0, 0x00, 0x02 for v2.0 (minor then major)
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//v2.0 released late 2016
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}
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//TODO verify it's INL Retro Prog by InfiniteNesLives.com, then break
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//else close handle and keep searching as there might be other devices with matching prod/devIDs
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//also verify firmware version is compatible
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//
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//TODO verify have permission to interface with device, else give notice to user
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break;
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}
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}
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check( retroprog != NULL, "Could not find INL retro-prog USB device");
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//free device list now that INL retro-prog was found and opened
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//void libusb_free_device_list ( libusb_device ** list, int unref_devices )
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libusb_free_device_list( device_list, 1); //don't completely understand the unref_devices = 1...
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device_list = NULL; //denote that device list is free if end up in error
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//Guess this is what you're supposed to do..
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// the process of opening a device can be viewed as follows:
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//
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// Discover devices using libusb_get_device_list().
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// Choose the device that you want to operate, and call libusb_open().
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// Unref all devices in the discovered device list.
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// Free the discovered device list.
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//
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// The order is important - you must not unreference the device before attempting to open it, because unreferencing it may destroy the device.
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//
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// For convenience, the libusb_free_device_list() function includes a parameter to optionally unreference all the devices in the list before freeing the list itself. This combines steps 3 and 4 above.
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//
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// As an implementation detail, libusb_open() actually adds a reference to the device in question. This is because the device remains available through the handle via libusb_get_device(). The reference is deleted during libusb_close().
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//free device list if it was left open
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if (device_list) {
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printf("Whoops! freeing device list\n");
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libusb_free_device_list( device_list, 1);
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}
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return handle;
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error:
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printf("open_usb_device went to error\n");
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if (device_list) {
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printf("freeing device list\n");
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libusb_free_device_list( device_list, 1);
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}
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if (handle) {
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printf("closing usb device\n");
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libusb_close(handle);
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}
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if (usb_init == LIBUSB_SUCCESS) {
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printf("deinitializing libusb\n");
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libusb_exit(context);
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}
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if (rv == LIBUSB_ERROR_ACCESS) {
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printf("-------------------------------------------------------\n");
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printf("Denied Permission is expected for initial use on Linux.\n");
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printf("See udev-rule-help/Readme.txt in host dir for help gaining permission.\n");
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printf("Try command with sudo for a cheap temporary solution.\n");
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}
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return NULL;
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}
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void close_usb(libusb_context *context, libusb_device_handle *handle)
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{
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//must close device before exiting
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libusb_close(handle);
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handle = NULL; //delete handle reference so error won't retry closing
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//deinitialize libusb to be called after closing all devices and before teminating application
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libusb_exit(context);
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return;
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}
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@ -0,0 +1,38 @@
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#ifndef _usb_operations_h
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#define _usb_operations_h
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#include "usb_operations.h"
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//control transfer request types
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//uint8_t libusb_control_setup::bmRequestType
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//Request type.
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// Bits 0:4 determine recipient, see libusb_request_recipient. Bits 5:6 determine type, see libusb_request_type. Bit 7 determines data transfer direction, see libusb_endpoint_direction.
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//
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//libusb_request_types:
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//LIBUSB_REQUEST_TYPE_STANDARD Standard handled by driver during setup/etc
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//LIBUSB_REQUEST_TYPE_CLASS Class for use with specific device classes like HID.
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//LIBUSB_REQUEST_TYPE_VENDOR Vendor application specific as we choose which is what we'll be utilizing for all transfers
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//LIBUSB_REQUEST_TYPE_RESERVED Reserved.
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//
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//libusb_request_recipients:
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//LIBUSB_RECIPIENT_DEVICE Device.
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//LIBUSB_RECIPIENT_INTERFACE Interface.
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//LIBUSB_RECIPIENT_ENDPOINT Endpoint.
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//LIBUSB_RECIPIENT_OTHER Other.
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//
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//LIBUSB_ENDPOINT_IN In: device-to-host.
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//LIBUSB_ENDPOINT_OUT Out: host-to-device.
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// vendor requests also defined in firmware
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// TODO put in combined .h file for both host and fw
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#define REQ_LED_ON 1
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#define REQ_LED_OFF 2
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//USB timeout
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#define SEC_5 5000
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libusb_device_handle * open_usb_device( libusb_context *context );
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void close_usb(libusb_context *context, libusb_device_handle *handle);
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#endif
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