Added test of access to trng from SW before trying to extract data.

1 files changed, 6 insertions, 0 deletions

diff --git a/eim/sw/trng_extractor_eim.c b/eim/sw/trng_extractor_eim.c
index 330c153..711ede1 100644
--- a/eim/sw/trng_extractor_eim.c
+++ b/eim/sw/trng_extractor_eim.c
@@ -134,6 +134,12 @@ int main(int argc, char *argv[])
     FILE *output = stdout;
     uint32_t data;
 
+    // Check that we have can talk to the trng.
+    if (avalanche_check() || rosc_check() || trng_check()) {
+            fprintf(stderr, "Can't properly access the trng.\n");
+            return EXIT_FAILURE;
+    }
+
     /* parse command line */
     while ((opt = getopt(argc, argv, "h?arcn:o:")) != -1) {
         switch (opt) {