int serialization functions

1 files changed, 15 insertions, 3 deletions

diff --git a/fw/serial.h b/fw/serial.h
index b071038..093b40c 100644
--- a/fw/serial.h
+++ b/fw/serial.h
@@ -20,19 +20,31 @@ enum {
 	SER_SIGFMT_SIZE = 8,
 };
 
+// Serialize a U16 into a big-endian array of bytes.
+void serU16Be(U8 buf[2u], U16 n);
+
+// Deserialize a big-endian array of bytes into a U16.
+U16 deserU16Be(const U8 buf[2u]);
+
+// Serialize a U32 into a big-endian array of bytes.
+void serU32Be(U8 buf[4u], U32 n);
+
+// Deserialize a big-endian array of bytes into a U32.
+U32 deserU32Be(const U8 buf[4u]);
+
 // Write a CAN ID to the EEPROM.
-// CAN IDs are stored in the lower 11 or 29 bits of a little-endian U32.
+// CAN IDs are stored in the lower 11 or 29 bits of a big-endian U32.
 // Bit 31 indicates standard/extended: 0=>std, 1=>ext.
 Status serWriteCanId(EepromAddr addr, const CanId *id);
 
 // Read a CAN ID from the EEPROM.
-// CAN IDs are stored in the lower 11 or 29 bits of a little-endian U32.
+// CAN IDs are stored in the lower 11 or 29 bits of a big-endian U32.
 // Bit 31 indicates standard/extended: 0=>std, 1=>ext.
 Status serReadCanId(EepromAddr addr, CanId *id);
 
 // Write a SigFmt to the EEPROM.
 // SigFmts use 8 bytes of space.
-// The ID is stored little-endian in the first 4 bytes: 0--3.
+// The ID is stored in the first 4 bytes: 0--3.
 // Start and Size occupy bytes 4 and 5.
 // The Byte-order and Signedness flags are bits 7 and 6 of byte 6, respectively.
 // Byte order: [6][7] = {0=>LE, 1=>BE}.