From ab46db4c388d126095e8e4d8fc3d7aa191a3d649 Mon Sep 17 00:00:00 2001
From: "Suren A. Chilingaryan" <csa@suren.me>
Date: Wed, 29 Apr 2015 04:50:52 +0200
Subject: Added a small grabbing example

---
 .bzrignore          |  1 +
 CMakeLists.txt      |  2 ++
 apps/CMakeLists.txt | 13 +++++++++++++
 apps/grab.c         | 49 +++++++++++++++++++++++++++++++++++++++++++++++++
 base.c              |  2 +-
 5 files changed, 66 insertions(+), 1 deletion(-)
 create mode 100644 apps/CMakeLists.txt
 create mode 100644 apps/grab.c

diff --git a/.bzrignore b/.bzrignore
index 164f343..d08bc93 100644
--- a/.bzrignore
+++ b/.bzrignore
@@ -3,3 +3,4 @@ Makefile
 cmake_install.cmake
 CMakeCache.txt
 install_manifest.txt
+grab
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 65db8c9..2bcfc15 100644
--- a/CMakeLists.txt
+++ b/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}
diff --git a/apps/CMakeLists.txt b/apps/CMakeLists.txt
new file mode 100644
index 0000000..761bb2b
--- /dev/null
+++ b/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)
diff --git a/apps/grab.c b/apps/grab.c
new file mode 100644
index 0000000..0f90e71
--- /dev/null
+++ b/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);
+}
diff --git a/base.c b/base.c
index 29363c1..6a24bda 100644
--- a/base.c
+++ b/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");
     }
     
-- 
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