Added a small grabbing example

.bzrignore

@@ -3,3 +3,4 @@ Makefile
 cmake_install.cmake
 CMakeCache.txt
 install_manifest.txt
+grab

CMakeLists.txt

@@ -13,6 +13,8 @@ pkg_check_modules(UFODECODE ufodecode>=0.3 REQUIRED)
 pkg_check_modules(PCILIB pcitool>=0.2 REQUIRED)
 exec_program("pkg-config --variable=plugindir pcitool" OUTPUT_VARIABLE PCILIB_PLUGIN_DIR)
 
+add_subdirectory(apps)
+
 include_directories(
     ${CMAKE_SOURCE_DIR}
     ${UFODECODE_INCLUDE_DIRS}

apps/CMakeLists.txt

@@ -0,0 +1,13 @@
+include_directories(
+    ${CMAKE_SOURCE_DIR}
+    ${PCILIB_INCLUDE_DIRS}
+)
+
+link_directories(
+    ${CMAKE_BINARY_DIR}
+    ${PCILIB_LIBRARY_DIRS}
+)
+
+
+add_executable(grab grab.c)
+target_link_libraries(grab ${PCILIB_LIBRARIES} ipecamera)

apps/grab.c

@@ -0,0 +1,49 @@
+#include <stdio.h>
+
+#include <pcilib.h>
+#include <pcilib/error.h>
+
+#include <ipecamera.h>
+
+int main() {
+    int err;
+    pcilib_event_id_t evid;
+    ipecamera_event_info_t info;
+    ipecamera_t *ipecamera;
+    size_t size;
+    void *data;
+    FILE *f;
+
+    pcilib_t *pcilib = pcilib_open("/dev/fpga0", "ipecamera");
+    if (!pcilib) pcilib_error("Error opening device");
+
+    ipecamera = (ipecamera_t*)pcilib_get_event_engine(pcilib);
+    if (!ipecamera) pcilib_error("Failed to get ipecamera event engine");
+
+    err = ipecamera_set_buffer_size(ipecamera, 8);
+    if (err) pcilib_error("Error (%i) setting buffer size", err);
+
+    err = pcilib_start(pcilib, PCILIB_EVENTS_ALL, PCILIB_EVENT_FLAGS_DEFAULT);
+    if (err) pcilib_error("Error (%i) starting event engine", err);
+
+    err = pcilib_trigger(pcilib, PCILIB_EVENT0, 0, NULL);
+    if (err) pcilib_error("Error (%i) triggering event", err);
+
+    err = pcilib_get_next_event(pcilib, 100000, &evid, sizeof(info), (pcilib_event_info_t*)&info);
+    if (err) pcilib_error("Error (%i) while waiting for event", err);
+
+    data = pcilib_get_data(pcilib, evid, PCILIB_EVENT_DATA, &size);
+    if (!data) pcilib_error("Error getting event data");
+
+    printf("Writting %zu bytes to /dev/null\n", size);
+    f = fopen("/dev/null", "w");
+    if (f) {
+	fwrite(data, 1, size, f);
+	fclose(f);
+    }
+
+    err = pcilib_return_data(pcilib, evid, PCILIB_EVENT_DATA, data);
+    if (err) pcilib_error("Error returning data, data is possibly corrupted");
+
+    pcilib_stop(pcilib, PCILIB_EVENT_FLAGS_DEFAULT);
+}

base.c

@@ -179,7 +179,7 @@ int ipecamera_set_buffer_size(ipecamera_t *ctx, int size) {
 	return PCILIB_ERROR_INVALID_REQUEST;
     }
     
-    if (((size^(size-1)) < size) < size) {
+    if ((size^(size-1)) < size) {
 	pcilib_error("The buffer size is not power of 2");
     }