Reduce max response payload size. (#7)

* reduce max payload size. see OpenXC vi-firmware issue #375 https://github.com/openxc/vi-firmware/issues/375.

* update isotp dependency with reduce isotp message size.

diff --git a/deps/isotp-c b/deps/isotp-c
index 4e73753..ee24440 160000 (submodule)
--- a/deps/isotp-c
+++ b/deps/isotp-c
@@ -1 +1 @@
-Subproject commit 4e7375321a029a32989bc7546329c385e6edb80f
+Subproject commit ee24440b7c123ab1b0317e57be33e837a1cb51f1

diff --git a/src/uds/uds_types.h b/src/uds/uds_types.h
index 66bf743..4ebc150 100644 (file)
--- a/src/uds/uds_types.h
+++ b/src/uds/uds_types.h
@@ -11,7 +11,7 @@ extern "C" {
 
 // TODO This still doesn't have enough space for the largest possible 
 // multiframe response. May need to dynamically allocate in the future.
-#define MAX_UDS_RESPONSE_PAYLOAD_LENGTH 255
+#define MAX_UDS_RESPONSE_PAYLOAD_LENGTH 127
 #define MAX_UDS_REQUEST_PAYLOAD_LENGTH 7
 #define MAX_RESPONDING_ECU_COUNT 8
 #define VIN_LENGTH 17