Add sample apps to use event and dma engines

1 files changed, 57 insertions, 0 deletions

diff --git a/apps/grab-frame.c b/apps/grab-frame.c
new file mode 100644
index 0000000..0cbdc00
--- /dev/null
+++ b/apps/grab-frame.c
@@ -0,0 +1,57 @@
+#include <stdio.h>
+#include <stdlib.h>
+
+#include <pcilib.h>
+#include <pcilib/error.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;
+    pcilib_event_info_t info;
+    size_t size;
+    void *data;
+    FILE *f;
+
+    pcilib_set_logger(PCILIB_LOG_WARNING, &log_error, NULL);
+
+    pcilib_t *pcilib = pcilib_open("/dev/fpga0", "pcidev");
+    if (!pcilib) pcilib_error("Error opening device");
+
+//    pcilib_context_t *evdev = (pcilib_context_t*)pcilib_get_event_engine(pcilib);
+//    if (!evdev) pcilib_error("Failed to get event engine");
+
+    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);
+}