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Christopher Van HooseandClaude Fable 5
844d8c3357
Heltec V4-R8 — "are we getting full performance?" audit. Compute side was already at spec; six gaps closed (record: variants/heltec_v4/R8_AUDIT.md "Perf pass"): - FEM LNA defaulted OFF on a KCT8103L board: prefs v49 defaults it ON on the R8 (one-time flip of existing installs, no new field). Toggle stays in Radio & Mesh. - Display SPI 40 -> 80 MHz (LGFX_SPI_WRITE_HZ; -D to 40000000 steps back). - Async DMA band flush (LGFXDisplay::flushBandRGB565): swap into a 12 KB internal DMA buffer, one no-convert DMA per band, lv_disp_flush_ready at once so LVGL renders band N+1 while band N drains; lv_disp_flush_is_last closes the frame transaction so the shared micro-SD gets the bus between frames. Sync fallback. - Wi-Fi modem power save is a pref (wifi_ps; toggle in Wi-Fi settings, live once associated). Default ON everywhere (unchanged), OFF on the R8. - micro-SD 4 -> 20 MHz after the proven mount, read-verified (probe-file head captured at 4 MHz and byte-compared after the raise; falls back). Wired at all three mount sites; no-op without SD_SPI_FAST_HZ. Note: SDFS::begin returns true if already mounted, so every clock change goes through SD.end() first. - R8 env boots at ESP32_CPU_FREQ=240 (setup() no longer runs at the V4's 80 MHz). - Settings -> About "Perf:" row on the R8 (no serial console on that board): "CPU 240 · TFT 80 MHz DMA · SD 20 MHz · LNA on" is the all-green reading. ThinkNode M9 UI: - Spectrum page root gets NAV_SKIP_FLAG: nothing on it is actionable, so the d-pad no longer highlights the chart / scale box; Back closes it as before. - Map "Show tile z/x/y" line defaults OFF (prefs v50, one-time flip; toggle kept). - The tab bar is bypassed entirely on the M9: the accent "glow" indicator lived on the screen, not in the bar, so hiding the zero-height bar left it glowing over the content's bottom edge. No bar styling / gestures / key hints / indicator are built on the M9 now. Cross-compiled: R8, V4, M9, T-Deck. Flashed + booted on the user's R8 and M9. Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
This directory is intended for project header files.
A header file is a file containing C declarations and macro definitions
to be shared between several project source files. You request the use of a
header file in your project source file (C, C++, etc) located in `src` folder
by including it, with the C preprocessing directive `#include'.
```src/main.c
#include "header.h"
int main (void)
{
...
}
```
Including a header file produces the same results as copying the header file
into each source file that needs it. Such copying would be time-consuming
and error-prone. With a header file, the related declarations appear
in only one place. If they need to be changed, they can be changed in one
place, and programs that include the header file will automatically use the
new version when next recompiled. The header file eliminates the labor of
finding and changing all the copies as well as the risk that a failure to
find one copy will result in inconsistencies within a program.
In C, the usual convention is to give header files names that end with `.h'.
It is most portable to use only letters, digits, dashes, and underscores in
header file names, and at most one dot.
Read more about using header files in official GCC documentation:
* Include Syntax
* Include Operation
* Once-Only Headers
* Computed Includes
https://gcc.gnu.org/onlinedocs/cpp/Header-Files.html