Point can_logger at /cana

Signed-off-by: Nikolai Sohmers <nikolai@sohmers.com>
Change-Id: Ibbd686a571da5c9aeee54371050733f262806100
diff --git a/frc971/can_logger/can_logger_main.cc b/frc971/can_logger/can_logger_main.cc
index b8f3f3f..8a2ca2a 100644
--- a/frc971/can_logger/can_logger_main.cc
+++ b/frc971/can_logger/can_logger_main.cc
@@ -1,7 +1,11 @@
+#include "absl/flags/flag.h"
+
 #include "aos/events/shm_event_loop.h"
 #include "aos/init.h"
 #include "frc971/can_logger/can_logger.h"
 
+ABSL_FLAG(std::string, interface_name, "can0", "Can interface to use");
+
 int main(int argc, char **argv) {
   ::aos::InitGoogle(&argc, &argv);
 
@@ -10,7 +14,8 @@
 
   ::aos::ShmEventLoop event_loop(&config.message());
 
-  frc971::can_logger::CanLogger can_logger(&event_loop, "/can", "can0");
+  frc971::can_logger::CanLogger can_logger(&event_loop, "/can",
+                                           absl::GetFlag(FLAGS_interface_name));
 
   event_loop.Run();