From 6f4af841f6fdd099b97d071ae64c8be60f809456 Mon Sep 17 00:00:00 2001
From: "Suren A. Chilingaryan" <csa@suren.me>
Date: Thu, 25 May 2023 22:41:04 +0200
Subject: A sample event engine for pcitool (not requiring any PCIe hardware).
 Initial (barely tested and intended only as an example) release

---
 apps/CMakeLists.txt | 13 +++++++++++
 apps/grab.c         | 63 +++++++++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 76 insertions(+)
 create mode 100644 apps/CMakeLists.txt
 create mode 100644 apps/grab.c

(limited to 'apps')

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..b891e2f
--- /dev/null
+++ b/apps/grab.c
@@ -0,0 +1,63 @@
+#include <stdio.h>
+#include <stdlib.h>
+
+#include <pcilib.h>
+#include <pcilib/error.h>
+
+#include <ipecamera.h>
+
+void log_error(void *arg, const char *file, int line, pcilib_log_priority_t prio, const char *format, va_list ap) {
+    vprintf(format, ap);
+    printf("\n");
+
+    if (prio == PCILIB_LOG_ERROR) {
+	printf("Exiting at [%s:%u]\n\n", file, line);
+	exit(-1);
+    }
+}
+
+
+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_set_logger(PCILIB_LOG_WARNING, &log_error, NULL);
+
+    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);
+}
-- 
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