From b6f66e394ad3f18b3dccea674b5c041f5a22fb41 Mon Sep 17 00:00:00 2001
From: Sam Anthony <sam@samanthony.xyz>
Date: Sat, 8 Nov 2025 10:26:23 -0500
Subject: swap signal byte_order to reflect amended dbc spec

---
 fw/main.c   | 2 +-
 fw/serial.c | 2 +-
 fw/signal.h | 6 +++---
 3 files changed, 5 insertions(+), 5 deletions(-)

(limited to 'fw')

diff --git a/fw/main.c b/fw/main.c
index b7b1efd..243f6b0 100644
--- a/fw/main.c
+++ b/fw/main.c
@@ -286,7 +286,7 @@ setSigFmt(const CanFrame *frame) {
 	// Unpack Encoding
 	sigFmt.start = frame->data[4u];
 	sigFmt.size = frame->data[5u];
-	sigFmt.order = (frame->data[6u] & 0x80) ? BIG_ENDIAN : LITTLE_ENDIAN;
+	sigFmt.order = (frame->data[6u] & 0x80) ? LITTLE_ENDIAN : BIG_ENDIAN;
 	sigFmt.isSigned = frame->data[6u] & 0x40;
 
 	// Save to EEPROM
diff --git a/fw/serial.c b/fw/serial.c
index fd60bcd..b763524 100644
--- a/fw/serial.c
+++ b/fw/serial.c
@@ -111,7 +111,7 @@ serReadSigFmt(EepromAddr addr, SigFmt *sig) {
 	}
 	sig->start = buf[0u];
 	sig->size = buf[1u];
-	sig->order = (buf[2u] & 0x80) ? BIG_ENDIAN : LITTLE_ENDIAN;
+	sig->order = (buf[2u] & 0x80) ? LITTLE_ENDIAN : BIG_ENDIAN;
 	sig->isSigned = buf[2u] & 0x40;
 
 	return OK;
diff --git a/fw/signal.h b/fw/signal.h
index 8bbc120..6489c6f 100644
--- a/fw/signal.h
+++ b/fw/signal.h
@@ -15,8 +15,8 @@
 
 // Byte order
 typedef enum {
-	LITTLE_ENDIAN = 0,
-	BIG_ENDIAN,
+	BIG_ENDIAN = 0,
+	LITTLE_ENDIAN,
 } ByteOrder;
 
 // A Signal Format defines how a DBC signal is encoded in a CAN frame.
@@ -24,7 +24,7 @@ typedef struct {
 	CanId id; // ID of message containing the signal
 	U8 start; // start bit -- position of signal within DATA FIELD
 	U8 size; // size of the signal in bits
-	ByteOrder order; // little-endian/big-endian
+	ByteOrder order; // big-endian/little-endian
 	bool isSigned;
 } SigFmt;
 
-- 
cgit v1.2.3