canbus: Move canbus uuid calculation to canbus.c

Move the uuid hash calculation to canbus.c and call canbus_set_uuid()
from src/stm32/chipid.c .  This simplifies the low-level canbus
hardware code.

Signed-off-by: Kevin O'Connor <kevin@koconnor.net>

1 files changed, 6 insertions, 2 deletions

diff --git a/src/generic/canbus.c b/src/generic/canbus.c
index 8526c5c1..3cc051c8 100644
--- a/src/generic/canbus.c
+++ b/src/generic/canbus.c
@@ -13,8 +13,11 @@
 #include "board/misc.h" // console_sendf
 #include "canbus.h" // canbus_set_uuid
 #include "command.h" // DECL_CONSTANT
+#include "fasthash.h" // fasthash64
 #include "sched.h" // sched_wake_task
 
+#define CANBUS_UUID_LEN 6
+
 // Global storage
 static struct canbus_data {
     uint32_t assigned_id;
@@ -323,9 +326,10 @@ command_get_canbus_id(uint32_t *args)
 DECL_COMMAND_FLAGS(command_get_canbus_id, HF_IN_SHUTDOWN, "get_canbus_id");
 
 void
-canbus_set_uuid(void *uuid)
+canbus_set_uuid(uint8_t *raw_uuid, uint32_t raw_uuid_len)
 {
-    memcpy(CanData.uuid, uuid, sizeof(CanData.uuid));
+    uint64_t hash = fasthash64(raw_uuid, raw_uuid_len, 0xA16231A7);
+    memcpy(CanData.uuid, &hash, sizeof(CanData.uuid));
     canbus_notify_rx();
 }