BlackMark
c01e583597
Six things the port had dropped or got wrong, and the one that matters is the last. The help is a table again — name, dots, description, one command per line — instead of a single line of bare words that said nothing about what any of them did. The layout is the original's, colons at column 12, which `bootloader` at ten characters is what sets. Abbreviations are back, and they were a feature: any prefix resolves to the first command it matches, so `up` is uptime and `st` is statistics. Order does the disambiguating, which is why the table is in the original's dispatch order and new entries go on the end — appending cannot take an abbreviation that already meant something. `reset` keeps the original's exception and must be typed in full: `r` should not be able to clear the histogram. The histogram gets its resolution back. The bar was capped at 40 columns where the original scaled to 100, and on a distribution this narrow that threw away most of the difference between neighbouring buckets. Same normalisation as before: divide by whatever makes the tallest bucket fit. The sample count moves to a fixed ten-column field before the bar, so the numbers read as a table instead of trailing off the ragged right end. `version` exists again, and this is 2.1 — 2.0 being the port as it stood. Added while here: `save`, to force the writeback that otherwise waits up to thirty minutes; the resistance in `show`, which is the one number that says *why* a temperature is wrong and which the original printed; a report when a line overflows the buffer rather than silently acting on its head; "no data yet" where there is none; and a blank line after each command's output. And the way out. `bootloader` now jumps rather than resetting, because pureboot hands straight back on WDRF by design — so the legacy watchdog-reset hand-over reaches it and opens no window, which on a board with no reset line is a board that cannot be reflashed. Two more bugs in the same three lines: the target was 0x7800, a 2 KB boot section's base, which on this board's 512-byte section reads erased and made the check false and the command a no-op; and UCSR0B was left set, which mutes a loader that bit-bangs the pin the USART still owns. All three are now read back out of the emitted image by ctest, the address and the watchdog red-proven against exactly the legacy behaviour they exist to catch. libavr advances to 71cfb2f. Verified on the board: FanTemp v2.1, min 0 C / max 74 C matching what 1.8b reported off the same EEPROM, the fan curve within one percentage point of the legacy double-precision one at every 5 C from 15 to 60, and `bootloader` -> pureboot 7 -> back to a running application. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
5.8 KiB
5.8 KiB