slim down usb_shm to only the things used in libeismulitplexer
This commit is contained in:
Carl Philipp Klemm
parent
ef73c41207
commit
c55b600d9e
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@ -6,6 +6,9 @@ find_package(PkgConfig REQUIRED)
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find_package(Doxygen)
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pkg_check_modules(LIBUSB REQUIRED libusb-1.0)
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set(CMAKE_CXX_STANDARD 17)
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set(CMAKE_C_STANDARD 11)
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set(SRC_FILES eismultiplexer.c usbshm.c)
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message("Platform " ${CMAKE_SYSTEM_NAME})
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@ -34,14 +34,6 @@
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#include <time.h>
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#include <stdio.h>
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static void usleep(uint64_t microseconds)
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{
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struct timespec ts;
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ts.tv_sec = microseconds / 1000000;
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ts.tv_nsec = (microseconds % 1000000) * 1000;
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nanosleep(&ts, NULL);
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}
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int eismultiplexer_connect(struct eismultiplexer* muliplexer, uint16_t serial)
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{
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int ret;
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@ -49,7 +41,7 @@ int eismultiplexer_connect(struct eismultiplexer* muliplexer, uint16_t serial)
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if(!muliplexer->priv)
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return -1;
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ret = usbshm_init(muliplexer->priv, NULL, muliplexer);
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ret = usbshm_init(muliplexer->priv);
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if(ret)
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return -2;
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@ -69,10 +61,7 @@ int eismultiplexer_connect_channel_exclusive(struct eismultiplexer* muliplexer,
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uint8_t* wValChar = (uint8_t*)&wValue;
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wValChar[0] = channel;
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wValChar[1] = 0;
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int ret;
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while((ret = usbshm_writeControlTransfer(muliplexer->priv, 2, NULL, 0, wValue, 0)) == USBSHM_ERROR_AGAIN)
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usleep(1000000);
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return ret;
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return usbshm_write_control_transfer(muliplexer->priv, 2, NULL, 0, wValue, 0);
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}
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int eismultiplexer_connect_channel(struct eismultiplexer* muliplexer, channel_t channel)
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@ -96,30 +85,28 @@ int eismultiplexer_disconnect_channel(struct eismultiplexer* muliplexer, channel
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channel_t eismultiplexer_get_connected(struct eismultiplexer* muliplexer)
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{
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uint8_t buffer[2] = {};
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usbshm_readControlTransferSync(muliplexer->priv, 3, 0, 0, buffer, 1);
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usbshm_read_control_transfer(muliplexer->priv, 3, 0, 0, buffer, 1);
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return buffer[0];
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}
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int eismultiplexer_set_led(struct eismultiplexer* muliplexer, bool on)
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{
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int ret;
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while((ret = usbshm_writeControlTransfer(muliplexer->priv, on, NULL, 0, 0, 0)) == USBSHM_ERROR_AGAIN)
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usleep(1000000);
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ret = usbshm_write_control_transfer(muliplexer->priv, on, NULL, 0, 0, 0);
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return ret;
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}
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int eismultiplexer_write_eeprom(struct eismultiplexer* muliplexer, uint16_t addr, uint16_t value)
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{
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int ret;
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while((ret = usbshm_writeControlTransfer(muliplexer->priv, 5, NULL, 0, value, addr)) == USBSHM_ERROR_AGAIN)
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usleep(1000000);
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ret = usbshm_write_control_transfer(muliplexer->priv, 5, NULL, 0, value, addr);
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return ret;
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}
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uint16_t eismultiplexer_read_eeprom(struct eismultiplexer* muliplexer, uint16_t addr)
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{
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uint8_t buffer[2] = {};
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usbshm_readControlTransferSync(muliplexer->priv, 4, 0, addr, buffer, 2);
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usbshm_read_control_transfer(muliplexer->priv, 4, 0, addr, buffer, 2);
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return *((uint16_t*)buffer);
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}
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246
usbshm.c
246
usbshm.c
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@ -25,101 +25,66 @@
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifdef __STDC_ALLOC_LIB__
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#define __STDC_WANT_LIB_EXT2__ 1
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#else
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#define _POSIX_C_SOURCE 200809L
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#endif
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#include "usbshm.h"
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#include <stdint.h>
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#include <stdio.h>
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#include <stdatomic.h>
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#include <stdbool.h>
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#include <string.h>
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#include <stdlib.h>
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#include <libusb-1.0/libusb.h>
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#include <errno.h>
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#include <unistd.h>
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struct usbshm_priv
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{
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libusb_device_handle* handle;
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struct libusb_transfer* transfer;
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unsigned char* buffer;
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};
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static unsigned objectCounter = 0;
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static struct timeval timeout = {1, 0};
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static pthread_mutex_t *libusbDataMutex;
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static pthread_t libusbThread;
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static atomic_bool threadStop;
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static void usbshm_transferCallBack(struct libusb_transfer *transfer);
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static int object_counter = 0;
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static struct libusb_context* context = NULL;
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void usbshm_distroy(struct usbshm* instance)
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{
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while(!usbshm_ready(instance))
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sleep(1);
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free(instance->priv->transfer);
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libusb_close(instance->priv->handle);
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free(instance->priv->buffer);
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free(instance->priv);
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pthread_mutex_lock(instance->mutex);
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libusb_close(instance->handle);
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if(instance->serial)
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free(instance->serial);
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if(--objectCounter == 0)
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{
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threadStop = true;
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pthread_join(libusbThread, NULL);
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libusb_exit(NULL);
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pthread_mutex_destroy(libusbDataMutex);
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}
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}
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static void* usbshm_libusbPoll(void* arg)
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bool usbshm_is_open(struct usbshm* instance)
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{
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while(!threadStop)
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{
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libusb_handle_events_timeout_completed(NULL, &timeout, NULL);
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}
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return NULL;
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return instance->handle != NULL;
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}
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bool usbshm_isOpen(struct usbshm* instance)
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int usbshm_init(struct usbshm* instance)
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{
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return instance->priv->handle != NULL;
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}
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int usbshm_init(struct usbshm* instance, void (*dataCallback)(uint8_t request, unsigned char* data, size_t length, void* user_data), void* user_data)
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{
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int ret=0;
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instance->priv = malloc(sizeof(*instance->priv));
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instance->priv->handle = NULL;
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instance->priv->transfer = NULL;
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instance->priv->buffer = NULL;
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instance->vendorID = 0;
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instance->productID = 0;
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instance->serial = NULL;
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instance->dataCallback = dataCallback;
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instance->user_data = user_data;
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if(objectCounter == 0)
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{
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ret = libusb_init(NULL) < 0 ? USBSHM_ERROR_ERR : 0;
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libusbDataMutex = malloc(sizeof(*libusbDataMutex));
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pthread_mutex_init(libusbDataMutex, NULL);
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pthread_create(&libusbThread, NULL, &usbshm_libusbPoll, NULL);
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}
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int ret = 0;
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if(object_counter == 0)
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ret = libusb_init(&context) < 0 ? USBSHM_ERROR_ERR : 0;
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if(ret == 0)
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objectCounter++;
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return ret < 0 ? USBSHM_ERROR_ERR : 0;
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}
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{
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++object_counter;
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instance->handle = NULL;
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instance->vendorID = 0;
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instance->productID = 0;
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instance->serial = NULL;
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instance->mutex = malloc(sizeof(*(instance->mutex)));
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pthread_mutex_init(instance->mutex, NULL);
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}
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bool usbshm_ready(struct usbshm* instance)
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{
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return instance->priv->transfer == NULL;
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return ret < 0 ? USBSHM_ERROR_ERR : 0;
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}
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int usbshm_open(struct usbshm* instance, int vendorID, int productID, const unsigned char* serial)
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{
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instance->priv->handle = NULL;
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pthread_mutex_lock(libusbDataMutex);
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if(instance->handle)
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return USBSHM_ERROR_ALLREADY_CONNECTED;
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if(!context)
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return USBSHM_ERROR_NOT_CONNECTED;
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pthread_mutex_lock(instance->mutex);
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libusb_device** list;
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int count = libusb_get_device_list(NULL, &list);
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int count = libusb_get_device_list(context, &list);
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int errorCode = 0;
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if( count > 0)
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{
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@ -129,21 +94,21 @@ int usbshm_open(struct usbshm* instance, int vendorID, int productID, const unsi
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libusb_get_device_descriptor(list[i], &desc);
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if(desc.idVendor == vendorID && desc.idProduct == productID)
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{
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errorCode = libusb_open(list[i], &instance->priv->handle) < 0 ? USBSHM_ERROR_ERR : 0;
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if(errorCode != USBSHM_ERROR_ERR && instance->priv->handle)
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errorCode = libusb_open(list[i], &instance->handle) < 0 ? USBSHM_ERROR_ERR : 0;
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if(errorCode != USBSHM_ERROR_ERR && instance->handle)
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{
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if(serial)
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{
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size_t len = strlen((const char*)serial)+1;
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unsigned char* buffer = malloc(len);
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buffer[0] = '\0';
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libusb_get_string_descriptor_ascii(instance->priv->handle, desc.iSerialNumber, buffer, len);
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libusb_get_string_descriptor_ascii(instance->handle, desc.iSerialNumber, buffer, len);
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int cmp = strcmp((const char*)serial, (const char*)buffer);
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free(buffer);
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if(cmp != 0)
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{
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libusb_close(instance->priv->handle);
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instance->priv->handle = NULL;
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libusb_close(instance->handle);
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instance->handle = NULL;
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continue;
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}
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}
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@ -151,7 +116,7 @@ int usbshm_open(struct usbshm* instance, int vendorID, int productID, const unsi
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}
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else
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{
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instance->priv->handle = NULL;
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instance->handle = NULL;
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}
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}
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}
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@ -159,11 +124,13 @@ int usbshm_open(struct usbshm* instance, int vendorID, int productID, const unsi
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else
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{
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printf("Can not list devices\n");
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pthread_mutex_unlock(libusbDataMutex);
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pthread_mutex_unlock(instance->mutex);
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return USBSHM_ERROR_ERR;
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}
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if(usbshm_isOpen(instance))
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pthread_mutex_unlock(instance->mutex);
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if(usbshm_is_open(instance))
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{
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instance->vendorID = vendorID;
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instance->productID = productID;
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@ -172,7 +139,7 @@ int usbshm_open(struct usbshm* instance, int vendorID, int productID, const unsi
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instance->serial = calloc(strlen((char*)serial), 1);
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memcpy(instance->serial, serial, strlen((char*)serial));
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}
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libusb_set_auto_detach_kernel_driver(instance->priv->handle, true);
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libusb_set_auto_detach_kernel_driver(instance->handle, true);
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}
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else
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{
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@ -181,120 +148,65 @@ int usbshm_open(struct usbshm* instance, int vendorID, int productID, const unsi
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}
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libusb_free_device_list(list, count);
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pthread_mutex_unlock(libusbDataMutex);
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return errorCode;
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}
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bool usbshm_usbshm_isOpen(struct usbshm* instance)
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bool usbshm_usbshm_is_open(struct usbshm* instance)
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{
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pthread_mutex_lock(libusbDataMutex);
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bool ret = instance->priv->handle != NULL;
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pthread_mutex_unlock(libusbDataMutex);
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pthread_mutex_lock(instance->mutex);
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bool ret = instance->handle != NULL;
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pthread_mutex_unlock(instance->mutex);
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return ret;
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}
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void usbshm_reset(struct usbshm* instance)
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{
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pthread_mutex_lock(libusbDataMutex);
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libusb_reset_device(instance->priv->handle);
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pthread_mutex_unlock(libusbDataMutex);
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pthread_mutex_lock(instance->mutex);
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libusb_reset_device(instance->handle);
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pthread_mutex_unlock(instance->mutex);
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}
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void usbshm_reopen(struct usbshm* instance)
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{
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usbshm_reset(instance);
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libusb_close(instance->priv->handle);
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usbshm_open(instance, instance->vendorID, instance->productID, instance->serial);
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libusb_close(instance->handle);
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char* serial = strdup((char*)instance->serial);
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free(instance->serial);
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usbshm_open(instance, instance->vendorID, instance->productID, (unsigned char*)serial);
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}
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int usbshm_writeControlTransfer(struct usbshm* instance, const uint8_t request,
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char* buffer, const uint8_t length,
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int usbshm_write_control_transfer(struct usbshm* instance, const uint8_t request,
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uint8_t* buffer, const uint8_t length,
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const uint16_t wValue, const uint16_t wIndex)
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{
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if(!usbshm_isOpen(instance))
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if(!usbshm_is_open(instance))
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return USBSHM_ERROR_NOT_CONNECTED;
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if(length > 8)
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return USBSHM_ERROR_PARAM;
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if(instance->priv->transfer == NULL)
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{
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pthread_mutex_lock(libusbDataMutex);
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instance->priv->buffer = malloc(length+8);
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libusb_fill_control_setup(instance->priv->buffer,
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LIBUSB_REQUEST_TYPE_VENDOR | LIBUSB_RECIPIENT_DEVICE | LIBUSB_ENDPOINT_OUT,
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request, wValue, wIndex, length );
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for(uint8_t i = 0; i < length; ++i)
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instance->priv->buffer[i+8] = buffer[i];
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instance->priv->transfer = libusb_alloc_transfer(0);
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libusb_fill_control_transfer(instance->priv->transfer, instance->priv->handle, instance->priv->buffer,
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&usbshm_transferCallBack, instance, 100);
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int ret = libusb_submit_transfer(instance->priv->transfer);
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if(ret < 0)
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{
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free(buffer);
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libusb_free_transfer(instance->priv->transfer);
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instance->priv->transfer = NULL;
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if(ret == LIBUSB_ERROR_NO_DEVICE)
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usbshm_reopen(instance);
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pthread_mutex_unlock(libusbDataMutex);
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}
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return ret < 0 ? USBSHM_ERROR_ERR : 0;
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}
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else return USBSHM_ERROR_AGAIN;
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pthread_mutex_lock(instance->mutex);
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int ret = libusb_control_transfer(instance->handle, LIBUSB_REQUEST_TYPE_VENDOR | LIBUSB_RECIPIENT_DEVICE | LIBUSB_ENDPOINT_OUT,
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request, wValue, wIndex, buffer, length, 2000);
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pthread_mutex_unlock(instance->mutex);
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if(ret == LIBUSB_ERROR_TIMEOUT)
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ret = USBSHM_ERROR_TIMEOUT;
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else if(ret < 0 )
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ret = USBSHM_ERROR_ERR;
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return ret;
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}
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int usbshm_readControlTransfer(struct usbshm* instance, const uint8_t request, const uint16_t wValue, const uint16_t wIndex, const uint16_t length)
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int usbshm_read_control_transfer(struct usbshm* instance, const uint8_t request, const uint16_t wValue, const uint16_t wIndex, uint8_t* buffer, const uint16_t length)
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{
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if(!usbshm_isOpen(instance))
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return USBSHM_ERROR_NOT_CONNECTED;
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if(length > 8)
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return USBSHM_ERROR_PARAM;
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if(instance->priv->transfer == NULL)
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{
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pthread_mutex_lock(libusbDataMutex);
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instance->priv->buffer = malloc(length+8);
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libusb_fill_control_setup(instance->priv->buffer, LIBUSB_REQUEST_TYPE_VENDOR | LIBUSB_RECIPIENT_DEVICE | LIBUSB_ENDPOINT_IN,
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request, wValue, wIndex, length);
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instance->priv->transfer = libusb_alloc_transfer(0);
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libusb_fill_control_transfer(instance->priv->transfer, instance->priv->handle, instance->priv->buffer,
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&usbshm_transferCallBack, instance, 100);
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int ret = libusb_submit_transfer(instance->priv->transfer);
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if(ret < 0)
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{
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free(instance->priv->buffer);
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libusb_free_transfer(instance->priv->transfer);
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instance->priv->transfer = NULL;
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if(ret == LIBUSB_ERROR_NO_DEVICE)
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usbshm_reopen(instance);
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pthread_mutex_unlock(libusbDataMutex);
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}
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return ret < 0 ? USBSHM_ERROR_ERR : 0;
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}
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else return USBSHM_ERROR_AGAIN;
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}
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static void usbshm_transferCallBack(struct libusb_transfer *transfer)
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{
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struct usbshm* context = (struct usbshm*)transfer->user_data;
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if(transfer->status != LIBUSB_TRANSFER_COMPLETED)
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{
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printf("Usb transfer failed with %d\n", transfer->status);
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}
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else if(transfer->type == LIBUSB_TRANSFER_TYPE_CONTROL)
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{
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if(context->dataCallback && transfer->length-8 >= transfer->actual_length)
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context->dataCallback(transfer->buffer[1], transfer->buffer+8, transfer->actual_length, context->user_data);
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}
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free(context->priv->buffer);
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libusb_free_transfer(context->priv->transfer);
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context->priv->transfer = NULL;
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pthread_mutex_unlock(libusbDataMutex);
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}
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int usbshm_readControlTransferSync(struct usbshm* instance, const uint8_t request, const uint16_t wValue, const uint16_t wIndex, uint8_t* buffer, const uint16_t length)
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{
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pthread_mutex_lock(libusbDataMutex);
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int ret = libusb_control_transfer(instance->priv->handle, LIBUSB_REQUEST_TYPE_VENDOR | LIBUSB_RECIPIENT_DEVICE | LIBUSB_ENDPOINT_IN,
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pthread_mutex_lock(instance->mutex);
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int ret = libusb_control_transfer(instance->handle, LIBUSB_REQUEST_TYPE_VENDOR | LIBUSB_RECIPIENT_DEVICE | LIBUSB_ENDPOINT_IN,
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request, wValue, wIndex, buffer, length, 2000);
|
||||
pthread_mutex_unlock(libusbDataMutex);
|
||||
return ret < 0 ? USBSHM_ERROR_ERR : 0;
|
||||
pthread_mutex_unlock(instance->mutex);
|
||||
|
||||
if(ret == LIBUSB_ERROR_TIMEOUT)
|
||||
ret = USBSHM_ERROR_TIMEOUT;
|
||||
else if(ret < 0 )
|
||||
ret = USBSHM_ERROR_ERR;
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
|
|
|||
24
usbshm.h
24
usbshm.h
|
|
@ -27,48 +27,42 @@
|
|||
|
||||
#include <libusb-1.0/libusb.h>
|
||||
#include <pthread.h>
|
||||
#include <stdatomic.h>
|
||||
#include <stdint.h>
|
||||
#include <time.h>
|
||||
#include <stdbool.h>
|
||||
|
||||
struct usbshm_priv;
|
||||
|
||||
enum {
|
||||
USBSHM_ERROR_AGAIN = -1,
|
||||
USBSHM_ERROR_PARAM = -2,
|
||||
USBSHM_ERROR_ERR = -3,
|
||||
USBSHM_ERROR_NOT_CONNECTED = -4,
|
||||
USBSHM_ERROR_ALLREADY_CONNECTED = -5,
|
||||
USBSHM_ERROR_TIMEOUT = -6
|
||||
};
|
||||
|
||||
struct usbshm {
|
||||
struct usbshm_priv* priv;
|
||||
int vendorID;
|
||||
int productID;
|
||||
unsigned char* serial;
|
||||
void* user_data;
|
||||
void (*dataCallback)(uint8_t request, unsigned char* data, size_t length, void* user_data);
|
||||
libusb_device_handle* handle;
|
||||
pthread_mutex_t* mutex;
|
||||
};
|
||||
|
||||
void usbshm_distroy(struct usbshm* instance);
|
||||
|
||||
int usbshm_init(struct usbshm* instance, void (*dataCallback)(uint8_t request, unsigned char* data, size_t length, void* user_data), void* user_data);
|
||||
|
||||
bool usbshm_ready(struct usbshm* instance);
|
||||
int usbshm_init(struct usbshm* instance);
|
||||
|
||||
int usbshm_open(struct usbshm* instance, int vendorID, int productID, const unsigned char* serial);
|
||||
|
||||
bool usbshm_isOpen(struct usbshm* instance);
|
||||
bool usbshm_is_open(struct usbshm* instance);
|
||||
|
||||
void usbshm_reset(struct usbshm* instance);
|
||||
|
||||
void usbshm_reopen(struct usbshm* instance);
|
||||
|
||||
int usbshm_writeControlTransfer(struct usbshm* instance, const uint8_t request,
|
||||
char* buffer, const uint8_t length,
|
||||
int usbshm_write_control_transfer(struct usbshm* instance, const uint8_t request,
|
||||
uint8_t* buffer, const uint8_t length,
|
||||
const uint16_t wValue, const uint16_t wIndex);
|
||||
|
||||
int usbshm_readControlTransfer(struct usbshm* instance, const uint8_t request, const uint16_t wValue, const uint16_t wIndex, const uint16_t length);
|
||||
|
||||
int usbshm_readControlTransferSync(struct usbshm* instance, const uint8_t request, const uint16_t wValue, const uint16_t wIndex, uint8_t* buffer, const uint16_t length);
|
||||
int usbshm_read_control_transfer(struct usbshm* instance, const uint8_t request, const uint16_t wValue, const uint16_t wIndex, uint8_t* buffer, const uint16_t length);
|
||||
|
||||
|
|
|
|||
Loading…
Reference in a new issue