The C28x CPU is 16-bit word-addressed (not byte-addressable). Each C28x word is 16 bits wide. In the binary file, each 16-bit word is stored little-endian (low byte at lower file offset).

How a 32-bit value appears in the binary file

A C28x uint32_t value 0xAABBCCDD stored at word address N:

C28x word address N:   value = 0xCCDD  (low 16 bits)
C28x word address N+1: value = 0xAABB  (high 16 bits)

Binary file bytes:
  offset 2k+0: 0xDD  ← low  byte of word[N]
  offset 2k+1: 0xCC  ← high byte of word[N]
  offset 2k+2: 0xBB  ← low  byte of word[N+1]
  offset 2k+3: 0xAA  ← high byte of word[N+1]

So uint32_t 0xAABBCCDD appears in the binary file as: DD CC BB AA

Example: codestart branch instruction

The "LB 0x081BC8" instruction at C28x 0x080000:

C28x word 0x080000: 0x4800  → binary bytes: 00 48
C28x word 0x080001: 0x1BC8  → binary bytes: C8 1B

Binary file at offset 0: 00 48 C8 1B