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pureboot: the info block reads as a table, one wire byte per line

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clang-format bin-packs braced lists to the column limit, collapsing the
'b' reply's byte layout into dense rows. A minimal clang-format-off span
keeps each wire byte on its own line, where the layout is legible against
the protocol. Whitespace only; image byte-identical.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
This commit is contained in:
BlackMark
2026-07-23 01:19:09 +02:00
parent 01e0169ac5
commit f9eeae5069
1 changed files with 15 additions and 4 deletions
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19
pureboot/pureboot.cpp
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@@ -72,13 +72,24 @@ constexpr std::uint8_t version = 4;
// The 'b' reply, byte for byte (layout: README.md). Flash-resident because
// no crt copies a .data image — and flash_table's storage carries the word
// alignment 'b' needs to halve the address on the large chips.
// One wire byte per line: this is the reply's layout, not a list.
// clang-format off
inline constexpr avr::flash_table<std::array<std::uint8_t, 12>{
'P', 'B', version, avr::hw::db.signature[0], avr::hw::db.signature[1], avr::hw::db.signature[2],
static_cast<std::uint8_t>(page), // 0 means 256
wire_base & 0xff, wire_base >> 8, avr::hw::db.mem.eeprom_size & 0xff, avr::hw::db.mem.eeprom_size >> 8,
static_cast<std::uint8_t>((boot_section ? 0 : 1) | (word_flash ? 2 : 0)), // patch-vector, word-addressed
'P',
'B',
version,
avr::hw::db.signature[0],
avr::hw::db.signature[1],
avr::hw::db.signature[2],
static_cast<std::uint8_t>(page), // 0 means 256
wire_base & 0xff,
wire_base >> 8,
avr::hw::db.mem.eeprom_size & 0xff,
avr::hw::db.mem.eeprom_size >> 8,
static_cast<std::uint8_t>((boot_section ? 0 : 1) | (word_flash ? 2 : 0)), // patch-vector, word-addressed
}>
info_data;
// clang-format on
// The serial link, per the build's PUREBOOT_USART / PUREBOOT_SOFT_SERIAL,
// defaulting to the chip's USART0 where it has one. The software receiver is