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chore(core): add comments to control byte

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This commit is contained in:
M1nd3r 2025-04-17 13:20:26 +02:00
parent ffc950a116
commit 07f432d9a0
1 changed files with 4 additions and 4 deletions
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8
core/src/trezor/wire/thp/control_byte.py
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@ -16,17 +16,17 @@ _DATA_MASK = const(0xE7)
def add_seq_bit_to_ctrl_byte(ctrl_byte: int, seq_bit: int) -> int:
if seq_bit == 0:
return ctrl_byte & 0xEF
return ctrl_byte & 0xEF # ...0 ....
if seq_bit == 1:
return ctrl_byte | 0x10
return ctrl_byte | 0x10 # ...1 ....
raise ThpError("Unexpected sequence bit")
def add_ack_bit_to_ctrl_byte(ctrl_byte: int, ack_bit: int) -> int:
if ack_bit == 0:
return ctrl_byte & 0xF7
return ctrl_byte & 0xF7 # .... 0...
if ack_bit == 1:
return ctrl_byte | 0x08
return ctrl_byte | 0x08 # .... 1...
raise ThpError("Unexpected acknowledgement bit")