Commit Graph
25 Commits
Author SHA1 Message Date
Xuan-Son Nguyen 243ae8b408 feat: show crash reason on boot (#1453)
## Summary

If the system reboots from crash, display the reason and tell user to
include `crash_report.txt` file.

To test this, simply add an `assert(false)` somewhere inside the code.


![screenshot-74453.bmp](https://github.com/user-attachments/files/26160373/screenshot-74453.bmp)

---

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2026-04-13 15:23:45 -05:00
Xuan-Son NguyenandZach Nelson 526c8a5e7a fix: use sleep routine from the original firmware (#1298)
## Summary

Fixes #1263

I spent half of my day(-off) reverse engineering the stock english
firmware V3.1.1, it's more or less like solving a sudoku with some known
pieces (like debug strings, known static addresses, known compiled
function, etc) and then the task is to guess the rest.

Long story short, this is the sleep routine that they use:

<img width="674" height="604" alt="image"
src="https://github.com/user-attachments/assets/6d53ce44-7bae-40c7-b4fb-24f898dbcc05"
/>

From the code above:
- They pull down GPIO13 (value = 0xd) before sleep
- They verify that power button is released by doing a delay loop of
50ms, similar to what we're doing
- `esp_sleep_config_gpio_isolate` is called but I'm not 100% sure why
- Pull up power button, note that it's likely redundant because power
button should already pulled up by `InputManager`
- `param1` and `param2` means enabling front/side buttons for wake up,
but it doesn't used in the code in reality. But I think it's physically
impossible, see the explanation below
- `param3` means "wake up from power button"
- `esp_sleep_start` is used; there is a logic to handle if it fails to
sleep, then retry recursively (no idea why!)

My observation is that they use GPIO13 so that it will be on HIGH state
when the chip is powered on, without any user space code to keep it on
that state. And once going to deep sleep, it goes into FLOATING by
default. That may explain why it need to be in LOW state before going to
sleep. (Nice trick btw)

Looking again at the circuit diagram provided
[here](https://github.com/sunwoods/Xteink-X4/blob/main/readme-img/sch.jpg)
(note: it's not official):

<img width="705" height="384" alt="image"
src="https://github.com/user-attachments/assets/b98d59fd-47ca-4d3d-a24a-94bf999e957b"
/>

It kinda make sense as the GPIO13 and VBUS (USB VCC) have the same role,
they are part of a simple "battery protection" cirtuit

Now, we may wonder, how the device wake up when there is no battery at
all?

<img width="440" height="323" alt="image"
src="https://github.com/user-attachments/assets/2981c411-239b-49a7-b9f7-9a75b6c1b6d3"
/>

It seems like power button is not just a simple switch between GPIO3 and
ground, but it also linked the POWER_CTRL, which leads to nowhere on the
diagram, but I suppose it connects the battery back for a short amount
of time, just enough for the MCU to wake up, and GPIO13 goes HIGH again.
It may also explain why power button becomes non-responsive for ~1
second after power on, as it's being pulled up by the current from
battery (remind: high = not pressed, low = pressed)

To test the theory above, I simply **comment out** the
`esp_deep_sleep_enable_gpio_wakeup`:
- On battery, power button works as nothing happen
- On USB, it doesn't wake up, I need to press RST

---

Important things about my analysis:
1. I had to name every function on the code above **manually**, but I'm
99% confident about it. The only function that I'm not sure is
`esp_wifi_bt_power_domain_off` ; Edit: it was indeed mislabeled, see
https://github.com/crosspoint-reader/crosspoint-reader/pull/1298#discussion_r2879670852
2. Some logic inside the stock firmware looks very strange, there is
almost no mention to "arduino" in the hardware, suggesting that they may
just call esp-idf functions directly, bypassing the arduino abstraction.

---

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---------

Co-authored-by: Zach Nelson <zach@zdnelson.com>
2026-03-21 13:35:38 -05:00
Xuan-Son Nguyenandcoderabbitai[bot] c40e92e4d1 fix: dump crash log without usb plugged, bump release log to INFO (#1332)
## Summary

Follow-up
https://github.com/crosspoint-reader/crosspoint-reader/pull/1145

- Fix log not being record without USB connected
- Bump release log to INFO for more logging details

---

### AI Usage

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---------

Co-authored-by: coderabbitai[bot] <136622811+coderabbitai[bot]@users.noreply.github.com>
2026-03-06 22:05:23 +01:00
Xuan-Son Nguyenandcoderabbitai[bot] 18b36efbae feat: dump crash report to sdcard (#1145)
## Summary

This allow dumping crash message (i.e. assertion fail) and stack trace
to `crash_report.txt` file on sdcard. The stack trace can then be
decoded using https://esphome.github.io/esp-stacktrace-decoder/

Could be useful to debug things like
https://github.com/crosspoint-reader/crosspoint-reader/issues/1137 where
error doesn't always happen.

May also be useful to show a screen to tell what happen (show on next
boot after crash), similar to [flipper zero crash
message](https://www.reddit.com/r/flipperzero/comments/10f8m3f/anyone_who_can_tell_me_why_this_message_pops_up/)
, but this is better to be a dedicated PR (I'm missing the
`drawTextWrapped` function, too lazy to code it ; update: exactly what I
need in
https://github.com/crosspoint-reader/crosspoint-reader/pull/1141)

To test this:
- Option 1: add an `assert(false)` somewhere in the code
- Option 2: try dereferencing a nullptr
- Option 3: try `throw` an exception

Example of a crash report:

```
CrossPoint version: 1.1.0-dev

Panic reason: abort() was called at PC 0x4214585b on core 0

Recent logs:
[196] [DBG] [GFX] Time = 2 ms from clearScreen to displayBuffer
[1831] [DBG] [RBS] Recent books loaded from file (7 entries)
[1832] [DBG] [ACT] Exiting activity: Boot
[1832] [DBG] [ACT] Entering activity: Home
[1891] [DBG] [GFX] Time = 54 ms from clearScreen to displayBuffer
[2521] [DBG] [GFX] Time = 46 ms from clearScreen to displayBuffer
[4839] [DBG] [PWR] Going to low-power mode
[10048] [INF] [MEM] Free: 134164 bytes, Total: 232372 bytes, Min Free: 133664 bytes
[20060] [INF] [MEM] Free: 134164 bytes, Total: 232372 bytes, Min Free: 133664 bytes
[30072] [INF] [MEM] Free: 134164 bytes, Total: 232372 bytes, Min Free: 133664 bytes
[34453] [DBG] [PWR] Restoring normal CPU frequency
[34485] [DBG] [GFX] Time = 30 ms from clearScreen to displayBuffer
[35182] [DBG] [GFX] Time = 31 ms from clearScreen to displayBuffer
[36675] [DBG] [GFX] Time = 30 ms from clearScreen to displayBuffer
[38800] [DBG] [GFX] Time = 30 ms from clearScreen to displayBuffer
[40079] [INF] [MEM] Free: 134164 bytes, Total: 232372 bytes, Min Free: 133664 bytes


Stack memory:
0x3FCB0650: 0x00000000 0x00000000 0x3FCB0668 0x4038DBB6 0x00000000 0x00000000 0x3FCA0030 0x3FC936D0 
0x3FCB0670: 0x3FCB067C 0x3FC936EC 0x3FCB0668 0x34313234 0x62353835 0x00000000 0x726F6261 0x20292874 
0x3FCB0690: 0x20736177 0x6C6C6163 0x61206465 0x43502074 0x34783020 0x35343132 0x20623538 0x63206E6F 
0x3FCB06B0: 0x2065726F 0x00000030 0x3FCA0000 0xB37A603F 0x00000001 0x3FCA7000 0x3FCABCDC 0x4214585E 
0x3FCB06D0: 0x3FCA7000 0x3FCA7000 0x3FCABCDC 0x421458AA 0x3FCABCDC 0x3FCA7000 0x3FCABCDC 0x421459CC 
0x3FCB06F0: 0x3FCA7000 0x3FCA7000 0x42145D5A 0x3C205624 0x40388560 0x3FCA7000 0x3FCABCFC 0x42079866 
0x3FCB0710: 0x3FCA7000 0x3FCA7000 0x00009C9A 0x4207B7F6 0x3FCA7000 0x42090000 0x001B7740 0x00000001 
0x3FCB0730: 0x3FCA7000 0x3FCA7000 0x00000001 0x600C0028 0x00000001 0x3FCA1000 0x00000000 0x00000000 
0x3FCB0750: 0x00000000 0x00000000 0x00000000 0xB37A603F 0x00000000 0x00000000 0x00000000 0x00000000 
0x3FCB0770: 0x00000000 0x00000000 0x00000000 0x00000000 0x00000000 0x42090000 0x3FCA7000 0x4208F9C4 
0x3FCB0790: 0x00000000 0x00000000 0x00000000 0x40388368 0x00000000 0x00000000 0x00000000 0x00000000 
0x3FCB07B0: 0x00000000 0x00000000 0x00000000 0x00000000 0x00000000 0xA5A5A5A5 0xA5A5A5A5 0xA5A5A5A5 
0x3FCB07D0: 0xA5A5A5A5 0xA5A5A5A5 0xA5A5A5A5 0xA5A5A5A5 0xBAAD5678 0xDA6D3601 0x5EB5B9C5 0x2602E480 
0x3FCB07F0: 0x2BCDD33F 0x15556D4A 0x1F2140A0 0x5D59BEE3 0x8E76449F 0x6FB2D0CE 0xF5F46FAC 0x0112946A 
0x3FCB0810: 0x3B0B32E0 0x7A52B537 0x46801DB4 0xDA85DF9F 0x37E83D20 0x12861028 0x47A702BB 0x287A3C8A 
0x3FCB0830: 0x03632209 0xD44C5489 0x5E258453 0xFDA77529 0xE6748E23 0xADCF1394 0x67AD6778 0x2C208663 
0x3FCB0850: 0xC7985786 0xD4AA3AB2 0x312E1760 0xEC7AEAAE 0x1857020E 0x48003E7E 0xD6CB8763 0x9B4A3F66 
0x3FCB0870: 0x4B79E9F6 0xCBF739F0 0x3794C641 0xD0DBA3CB 0x95B9BE15 0x581C9983 0xDE62EFB6 0x20C67C5B 
0x3FCB0890: 0x1E4A3DF3 0xFB317C74 0xC0D86103 0x1D79ED56 0x72FE0862 0x3D38B0C8 0xD27EB587 0x0E0A4C40 
0x3FCB08B0: 0xF643ADC0 0x56D114D7 0x703AF879 0xAC7F3075 0x89C78C23 0xEDA86814 0xF767B3E3 0x0528838F 
0x3FCB08D0: 0x50ED4662 0x11FD38E7 0x8A5A83BB 0x658159BD 0x781AF696 0x8A700F79 0x526DDE23 0xC8472505 
0x3FCB08F0: 0x21AACC02 0xCB89369E 0xB82E5BE2 0x4C6C9D7D 0x9E724D9B 0xDC1067F7 0x84478FBC 0x4E89C444 
0x3FCB0910: 0x973F4229 0x49F93DA8 0xE30200F6 0xD1B5C391 0x8363A89F 0x2409E74C 0x3AFF7B52 0xCBEC2349 
0x3FCB0930: 0xD38F6695 0xBC3EA980 0xF067EBB1 0x7F87D167 0x92B3823B 0x9F0617D7 0xA7537C57 0x12CAB3D4 
0x3FCB0950: 0xC82EEE37 0x84D4B4BC 0xE1E2261C 0x488F0ADA 0x96EAF2FF 0x0BC493A0 0xCE614467 0x3829053D 
0x3FCB0970: 0xA41156BE 0x2747B77D 0x64DEA90B 0xE704AB0A 0xE4B01006 0x8D51903C 0x56CD3CF2 0x07E0A8E8 
0x3FCB0990: 0xD1DE05CE 0x33368522 0xD1889988 0x3A3097F4 0xB0796D09 0xC78948AA 0x6DEFC56E 0xD5C2E1D9 
0x3FCB09B0: 0xFD6DD8FA 0xA957B675 0xC202D80D 0x733FF8F4 0xA1484913 0x0B9AFBA6 0x330C07EA 0x2C09AD4C 
0x3FCB09D0: 0x3B1E08F7 0x3FCAE7D0 0x00000170 0xABBA1234 0x0000015C 0x3FCB00E0 0x00009C93 0x3FCA13C4 
0x3FCB09F0: 0x3FCA13C4 0x3FCB09E4 0x3FCA13BC 0x00000018 0x00000000 0x00000000 0x3FCB09E4 0x00000000 
0x3FCB0A10: 0x00000001 0x3FCAE7E0 0x706F6F6C 0x6B736154 0x00000000 0x00000000 0x3FCB07D0 0x00000005 
0x3FCB0A30: 0x00000000 0x00000001 0x00000000 0x3FCAB444 0x4209AFF0 0x0017E38F 0x00000000 0x3FCA7BD0 

```

---

### AI Usage

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please be transparent about their usage as it
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Did you use AI tools to help write this code? **NO**

---------

Co-authored-by: coderabbitai[bot] <136622811+coderabbitai[bot]@users.noreply.github.com>
2026-03-06 17:46:13 +01:00
Xuan-Son Nguyen 307a6608f0 chore: remove rendundant xTaskCreate (#1264)
## Summary

Ref discussion:
https://github.com/crosspoint-reader/crosspoint-reader/pull/1222#discussion_r2865402110

Important note that this is a bug-for-bug fix. In reality, this branch
`WiFi.status() == WL_CONNECTED` is pretty much a dead code because the
entry point of these 2 activities don't use wifi.

It is better to refactor the management of network though, but it's
better to be a dedicated PR.

---

### AI Usage

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please be transparent about their usage as it
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2026-03-02 13:30:55 +01:00
Xuan-Son Nguyenandcoderabbitai[bot] a57c62f0b4 fix: properly implement requestUpdateAndWait() (#1218)
## Summary

Properly implement `requestUpdateAndWait()` using freeRTOS direct task
notification.

FWIW, I think most of the current use cases of `requestUpdateAndWait()`
are redundant, better to be replaced by `requestUpdate(true)`. But just
keeping them in case we can find a proper use case for it in the future.

---

### AI Usage

While CrossPoint doesn't have restrictions on AI tools in contributing,
please be transparent about their usage as it
helps set the right context for reviewers.

Did you use AI tools to help write this code? **YES**, it's trivial, so
I asked an AI to write the code

---------

Co-authored-by: coderabbitai[bot] <136622811+coderabbitai[bot]@users.noreply.github.com>
2026-03-01 12:12:57 +11:00
Xuan-Son NguyenandZach Nelson 6ff5fcd9a7 fix: make file system operations thread-safe (HalFile) (#1212)
## Summary

Fix https://github.com/crosspoint-reader/crosspoint-reader/issues/1137

Introducing `HalFile`, a thin wrapper around `FsFile` that uses a global
mutex to protect file operations.

To test this PR, place the code below somewhere in the code base (I
placed it in `onGoToRecentBooks`)

```cpp
static auto testTask = [](void* param) {
  for (int i = 0; i < 10; i++) {
    String json = Storage.readFile("/.crosspoint/settings.json");
    LOG_DBG("TEST_TASK", "Read settings.json, bytes read: %u", json.length());
  }
  vTaskDelete(nullptr);
};
xTaskCreate(testTask, "test0", 8192, nullptr, 1, nullptr);
xTaskCreate(testTask, "test1", 8192, nullptr, 1, nullptr);
xTaskCreate(testTask, "test2", 8192, nullptr, 1, nullptr);
xTaskCreate(testTask, "test3", 8192, nullptr, 1, nullptr);
delay(1000);
```

It will reliably lead to crash on `master`, but will function correctly
with this PR.

A macro renaming trick is used to avoid changing too many downstream
code files.

---

### AI Usage

While CrossPoint doesn't have restrictions on AI tools in contributing,
please be transparent about their usage as it
helps set the right context for reviewers.

Did you use AI tools to help write this code? **PARTIALLY**, only to
help with tedious copy-paste tasks

---------

Co-authored-by: Zach Nelson <zach@zdnelson.com>
2026-02-28 11:15:27 +01:00
Xuan-Son NguyenandZach Nelson c4fc4effbd refactor: implement ActivityManager (#1016)
## Summary

Ref comment:
https://github.com/crosspoint-reader/crosspoint-reader/pull/1010#pullrequestreview-3828854640

This PR introduces `ActivityManager`, which mirrors the same concept of
Activity in Android, where an activity represents a single screen of the
UI. The manager is responsible for launching activities, and ensuring
that only one activity is active at a time.

Main differences from Android's ActivityManager:
- No concept of Bundle or Intent extras
- No onPause/onResume, since we don't have a concept of background
activities
- onActivityResult is implemented via a callback instead of a separate
method, for simplicity

## Key changes

- Single `renderTask` shared across all activities
- No more sub-activity, we manage them using a stack; Results can be
passed via `startActivityForResult` and `setResult`
- Activity can call `finish()` to destroy themself, but the actual
deletion will be handled by `ActivityManager` to avoid `delete this`
pattern

As a bonus: the manager will automatically call `requestUpdate()` when
returning from another activity

## Example usage

**BEFORE**:

```cpp
// caller
    enterNewActivity(new WifiSelectionActivity(renderer, mappedInput,
                                               [this](const bool connected) { onWifiSelectionComplete(connected); }));

// subactivity
  onComplete(true); // will eventually call exitActivity(), which deletes the caller instance (dangerous behavior)
``` 

**AFTER**: (mirrors the `startActivityForResult` and `setResult` from
android)

```cpp
// caller
  startActivityForResult(new NetworkModeSelectionActivity(renderer, mappedInput),
                         [this](const ActivityResult& result) { onNetworkModeSelected(result.selectedNetworkMode); });

// subactivity
  ActivityResult result;
  result.isCancelled = false;
  result.selectedNetworkMode = mode;
  setResult(result);
  finish(); // signals to ActivityManager to go back to last activity AFTER this function returns
```

TODO:
- [x] Reconsider if the `Intent` is really necessary or it should be
removed (note: it's inspired by
[Intent](https://developer.android.com/guide/components/intents-common)
from Android API) ==> I decided to keep this pattern fr clarity
- [x] Verify if behavior is still correct (i.e. back from sub-activity)
- [x] Refactor the `ActivityWithSubactivity` to just simple `Activity`
--> We are using a stack for keeping track of sub-activity now
- [x] Use single task for rendering --> avoid allocating 8KB stack per
activity
- [x] Implement the idea of [Activity
result](https://developer.android.com/training/basics/intents/result)
--> Allow sub-activity like Wifi to report back the status (connected,
failed, etc)

---

### AI Usage

While CrossPoint doesn't have restrictions on AI tools in contributing,
please be transparent about their usage as it
helps set the right context for reviewers.

Did you use AI tools to help write this code? **PARTIALLY**, some
repetitive migrations are done by Claude, but I'm the one how ultimately
approve it

---------

Co-authored-by: Zach Nelson <zach@zdnelson.com>
2026-02-27 00:32:40 -06:00
Xuan-Son Nguyen ae94e97fb8 fix: sdfat warning about redefinition of macro (#1135)
## Summary

Fix redefinition of `FILE_*` macro.

Note that there will still be 2 warning:

```
.pio/libdeps/default/WebSockets/src/WebSocketsClient.cpp: In member function 'void WebSocketsClient::clientDisconnect(WSclient_t*, const char*)':
.pio/libdeps/default/WebSockets/src/WebSocketsClient.cpp:573:31: warning: 'virtual void NetworkClient::flush()' is deprecated: Use clear() instead. [-Wdeprecated-declarations]
  573 |             client->tcp->flush();
      |             ~~~~~~~~~~~~~~~~~~^~
```

--> I assume the upstream library need to fix it

And:

```
src/activities/Activity.cpp:8:1: warning: 'noreturn' function does return
    8 | }
      | ^
```

Will be fixed in #1016 

---

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please be transparent about their usage as it
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2026-02-23 12:52:25 -06:00
Xuan-Son Nguyen 7761ced0ed fix: acquire power lock before sleeping (#1125)
## Summary

Ref: https://github.com/crosspoint-reader/crosspoint-reader/issues/1110

Power lock is automatically acquired on `render()`. However, instead of
using `render()`, sleep activity render everything right inside
`onEnter()`, so no power lock was acquired.

After https://github.com/crosspoint-reader/crosspoint-reader/pull/1016 ,
the power lock will also be acquired on activity transition.

---

### AI Usage

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2026-02-23 20:07:55 +03:00
Xuan-Son Nguyen 75ff7b25ab fix: double free WebDAVHandler (#1093)
## Summary

Ref:
https://github.com/crosspoint-reader/crosspoint-reader/pull/1047#discussion_r2838439305

To reproduce:
1. Open file transfer
2. Join a network
3. Once it's connected, press (hold) back

---

### AI Usage

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please be transparent about their usage as it
helps set the right context for reviewers.

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2026-02-22 22:20:41 +01:00
Xuan-Son Nguyen 840e8c38f1 feat: add script for listing objects in flash (#880)
## Summary

Adding a simple script to list objects and its size. I know `pio`
already had the "analyze" function but it never works in my case.

Ref discussion:
https://github.com/crosspoint-reader/crosspoint-reader/discussions/862

To use it:

```sh
scripts/script_profile_mem.sh
```

Example:

```
============================================
Top 10 largest symbols in section: .dram0.bss
Total section size: 85976 bytes (83.96 KB)
============================================
    0000bb98 (  46.90 KB)  display
    00000ed8 (   3.71 KB)  g_cnxMgr
    00000ad8 (   2.71 KB)  ftm_initiator
    00000830 (   2.05 KB)  xIsrStack
    000005b4 (   1.43 KB)  packet.8427
    000004e0 (   1.22 KB)  _ZN12_GLOBAL__N_17ctype_wE
    000004a0 (   1.16 KB)  dns_table
    0000049c (   1.15 KB)  s_wifi_nvs
    00000464 (   1.10 KB)  s_coredump_stack
    0000034c (   0.82 KB)  gWpaSm

============================================
Top 10 largest symbols in section: .dram0.data
Total section size: 13037 bytes (12.73 KB)
============================================
    000003c0 (   0.94 KB)  TxRxCxt
    00000328 (   0.79 KB)  phy_param
    000001d0 (   0.45 KB)  g_wifi_osi_funcs
    0000011b (   0.28 KB)  _ZN18CrossPointSettings8instanceE
    000000e6 (   0.22 KB)  country_info_24ghz
    000000dc (   0.21 KB)  g_eb_list_desc
    000000c0 (   0.19 KB)  s_fd_table
    000000b8 (   0.18 KB)  g_timer_info
    000000a8 (   0.16 KB)  rc11NSchedTbl
    000000a0 (   0.16 KB)  g_rmt_objects

============================================
Top 200 largest symbols in section: .flash.rodata
Total section size: 4564375 bytes (4457.40 KB)
============================================
    000325b7 ( 201.43 KB)  _ZL12de_trie_data
    0001cbd8 ( 114.96 KB)  _ZL29notosans_18_bolditalicBitmaps
    0001ca38 ( 114.55 KB)  _ZL29bookerly_18_bolditalicBitmaps
    0001bd3f ( 111.31 KB)  _ZL23bookerly_18_boldBitmaps
    0001af54 ( 107.83 KB)  _ZL23notosans_18_boldBitmaps
    0001abcc ( 106.95 KB)  _ZL25bookerly_18_italicBitmaps
    0001a341 ( 104.81 KB)  _ZL25notosans_18_italicBitmaps
    0001a0a5 ( 104.16 KB)  _ZL26bookerly_18_regularBitmaps
    0001890c (  98.26 KB)  _ZL26notosans_18_regularBitmaps
    000188cc (  98.20 KB)  _ZL33opendyslexic_14_bolditalicBitmaps
    000170ca (  92.20 KB)  _ZL29notosans_16_bolditalicBitmaps
    00015e7f (  87.62 KB)  _ZL29bookerly_16_bolditalicBitmaps
    00015acb (  86.70 KB)  _ZL23notosans_16_boldBitmaps
    00015140 (  84.31 KB)  _ZL23bookerly_16_boldBitmaps
    00014f0c (  83.76 KB)  _ZL25notosans_16_italicBitmaps
    00014d54 (  83.33 KB)  _ZL29opendyslexic_14_italicBitmaps
    00014766 (  81.85 KB)  _ZL27opendyslexic_14_boldBitmaps
    0001467f (  81.62 KB)  _ZL25bookerly_16_italicBitmaps
    00013c46 (  79.07 KB)  _ZL26bookerly_16_regularBitmaps
    00013934 (  78.30 KB)  _ZL26notosans_16_regularBitmaps
    00012572 (  73.36 KB)  _ZL33opendyslexic_12_bolditalicBitmaps
    00011cee (  71.23 KB)  _ZL29notosans_14_bolditalicBitmaps
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============================================
Top 40 largest symbols in section: .flash.text
Total section size: 1431082 bytes (1397.54 KB)
============================================
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============================================
Top 10 largest symbols in section: .iram0.text
Total section size: 57640 bytes (56.29 KB)
============================================
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```

---

### AI Usage

While CrossPoint doesn't have restrictions on AI tools in contributing,
please be transparent about their usage as it
helps set the right context for reviewers.

Did you use AI tools to help write this code? **YES**
2026-02-19 22:36:43 +11:00
Xuan-Son Nguyen 6ec5fc5603 feat: lower CPU freq on idle, add HalPowerManager (#852)
## Summary

Continue my experiment from
https://github.com/crosspoint-reader/crosspoint-reader/pull/801

This PR add the ability to lower the CPU frequency on extended idle
period (currently set to 3 seconds). By default, the esp32c3 CPU is set
to 160MHz, and now on idle, we can reduce it to just 10MHz.

Note that while this functionality is already provided by [esp power
management](https://docs.espressif.com/projects/esp-idf/en/v4.3/esp32c3/api-reference/system/power_management.html),
the current Arduino build lacks of this, and enabling it is just too
complicated (not worth the effort compared to this PR)

Update: more info in
https://github.com/crosspoint-reader/crosspoint-reader/pull/852#issuecomment-3904562827

## Testing

Pre-condition for each test case: the battery is charged to 100%, and is
left plugged in after fully charged for an extra 1 hour.

The table below shows how much battery is **used** for a given duration:

| case / duration | 6 hrs | 12 hrs |
| --- | --- | --- |
| `delay(10)` | 26% | 48% |
| `delay(50)`, PR
https://github.com/crosspoint-reader/crosspoint-reader/pull/801 | 20% |
Not tested |
| `delay(50)` + low CPU freq (This PR) | Not tested | 25% |
| `delay(10)` + low CPU freq (1) | Not tested | Not tested |

(1) I decided not to test this case because it may not make sense. The
problem is that CPU frequency vs power consumption do not follow a
linear relationship, see
[this](https://www.arrow.com/en/research-and-events/articles/esp32-power-consumption-can-be-reduced-with-sleep-modes)
as an example. So, tight loop (10ms) + lower CPU freq significantly
impact battery life, because the active CPU time is now much higher
compared to the wall time.

**So in conclusion, this PR improves ~150% to ~200% battery use time per
charge.**

The projected battery life is now: ~36-48 hrs of reading time (normal
reading, no wifi)

---

### AI Usage

While CrossPoint doesn't have restrictions on AI tools in contributing,
please be transparent about their usage as it
helps set the right context for reviewers.

Did you use AI tools to help write this code? **NO**
2026-02-18 17:12:29 +03:00
Xuan-Son Nguyen 3d47c081f2 fix: use RAII render lock everywhere (#916)
## Summary

Follow-up to
https://github.com/crosspoint-reader/crosspoint-reader/pull/774

---

### AI Usage

While CrossPoint doesn't have restrictions on AI tools in contributing,
please be transparent about their usage as it
helps set the right context for reviewers.

Did you use AI tools to help write this code? **NO**


<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->

## Summary by CodeRabbit

## Release Notes

* **Refactor**
* Modernized internal synchronization mechanisms across multiple
components to improve code reliability and maintainability. All
functionality remains unchanged.

<!-- end of auto-generated comment: release notes by coderabbit.ai -->
2026-02-16 23:53:00 +11:00
Xuan-Son Nguyenandznelson a616f42cb4 refactor: move render() to Activity super class, use freeRTOS notification (#774)
## Summary

Currently, each activity has to manage their own `displayTaskLoop` which
adds redundant boilerplate code. The loop is a wait loop which is also
not the best practice, as the `updateRequested` boolean is not protected
by a mutex.

In this PR:
- Move `displayTaskLoop` to the super `Activity` class
- Replace `updateRequested` with freeRTOS's [direct to task
notification](https://www.freertos.org/Documentation/02-Kernel/02-Kernel-features/03-Direct-to-task-notifications/01-Task-notifications)
- For `ActivityWithSubactivity`, whenever a sub-activity is present, the
parent's `render()` automatically goes inactive

With this change, activities now only need to expose `render()`
function, and anywhere in the code base can call `requestUpdate()` to
request a new rendering pass.

## Additional Context

In theory, this change may also make the battery life a bit better,
since one wait loop is removed. Although the equipment in my home lab
wasn't been able to verify it (the electric current is too noisy and
small). Would appreciate if anyone has any insights on this subject.

Update: I managed to hack [a small piece of
code](https://github.com/ngxson/crosspoint-reader/tree/xsn/measure_cpu_usage)
that allow tracking CPU idle time.

The CPU load does decrease a bit (1.47% down to 1.39%), which make
sense, because the display task is now sleeping most of the time unless
notified. This should translate to a slightly increase in battery life
in the long run.

```
PR:
[40012] [MEM] Free: 185856 bytes, Total: 231004 bytes, Min Free: 123316 bytes
[40012] [IDLE] Idle time: 98.61% (CPU load: 1.39%)
[50017] [MEM] Free: 185856 bytes, Total: 231004 bytes, Min Free: 123316 bytes
[50017] [IDLE] Idle time: 98.61% (CPU load: 1.39%)
[60022] [MEM] Free: 185856 bytes, Total: 231004 bytes, Min Free: 123316 bytes
[60022] [IDLE] Idle time: 98.61% (CPU load: 1.39%)

master:
[20012] [MEM] Free: 195016 bytes, Total: 231532 bytes, Min Free: 132460 bytes
[20012] [IDLE] Idle time: 98.53% (CPU load: 1.47%)
[30017] [MEM] Free: 195016 bytes, Total: 231532 bytes, Min Free: 132460 bytes
[30017] [IDLE] Idle time: 98.53% (CPU load: 1.47%)
[40022] [MEM] Free: 195016 bytes, Total: 231532 bytes, Min Free: 132460 bytes
[40022] [IDLE] Idle time: 98.53% (CPU load: 1.47%)
```

---

### AI Usage

While CrossPoint doesn't have restrictions on AI tools in contributing,
please be transparent about their usage as it
helps set the right context for reviewers.

Did you use AI tools to help write this code? **NO**


<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->

## Summary by CodeRabbit

* **Refactor**
* Streamlined rendering architecture by consolidating update mechanisms
across all activities, improving efficiency and consistency.
* Modernized synchronization patterns for display updates to ensure
reliable, conflict-free rendering.

* **Bug Fixes**
* Enhanced rendering stability through improved locking mechanisms and
explicit update requests.

<!-- end of auto-generated comment: release notes by coderabbit.ai -->

---------

Co-authored-by: znelson <znelson@users.noreply.github.com>
2026-02-16 21:11:15 +11:00
Xuan-Son Nguyen 0508bfc1f7 perf: apply (micro) optimization on SerializedHyphenationPatterns (#689)
## Summary

This PR applies a micro optimization on `SerializedHyphenationPatterns`,
which allow reading `rootOffset` directly without having to parse then
cache it.

It should not affect storage space since no new bytes are added.

This also gets rid of the linear cache search whenever
`liangBreakIndexes` is called. In theory, the performance should be
improved a bit, although it may be too small to be noticeable in
practice.

## Testing

master branch:

```
english: 99.1023%
french: 100%
german: 97.7289%
russian: 97.2167%
spanish: 99.0236%
```

This PR:

```
english: 99.1023%
french: 100%
german: 97.7289%
russian: 97.2167%
spanish: 99.0236%
```

---

### AI Usage

While CrossPoint doesn't have restrictions on AI tools in contributing,
please be transparent about their usage as it
helps set the right context for reviewers.

Did you use AI tools to help write this code? PARTIALLY - mostly IDE
tab-autocompletions
2026-02-16 20:27:43 +11:00
Xuan-Son Nguyen 5816ab2a47 feat: use pre-compressed HTML pages (#861)
## Summary

Pre-compress the HTML file to save flash space. I'm using `gzip` because
it's supported everywhere (indeed, we are using the same optimization on
[llama.cpp server](https://github.com/ggml-org/llama.cpp), our HTML page
is huge 😅 ).

This free up ~40KB flash space.

Some users suggested using `brotli` which is known to further reduce 20%
in size, but it doesn't supported by firefox (only supports if served
via HTTPS), and some reverse proxy like nginx doesn't support it out of
the box (unrelated in this context, but just mention for completeness)

```
PR:
RAM:   [===       ]  31.0% (used 101700 bytes from 327680 bytes)
Flash: [==========]  95.5% (used 6259244 bytes from 6553600 bytes)

master:
RAM:   [===       ]  31.0% (used 101700 bytes from 327680 bytes)
Flash: [==========]  96.2% (used 6302416 bytes from 6553600 bytes)
```

---

### AI Usage

While CrossPoint doesn't have restrictions on AI tools in contributing,
please be transparent about their usage as it
helps set the right context for reviewers.

Did you use AI tools to help write this code? **PARTIALLY**, only the
python part
2026-02-14 18:49:39 +03:00
Xuan-Son Nguyen 0991782fb4 feat: more power saving on idle (#801)
## Summary

This PR extends the delay in main loop from 10ms to 50ms after the
device is idle for a while. This translates to extended battery life in
a longer period (see testing section above), while not hurting too much
the user experience.

With the help from [this
patch](https://github.com/ngxson/crosspoint-reader/tree/xsn/measure_cpu_usage),
I was able to measure the CPU usage on idle:

```
PR:
[20017] [MEM] Free: 150188 bytes, Total: 232092 bytes, Min Free: 150092 bytes
[20017] [IDLE] Idle time: 99.62% (CPU load: 0.38%)
[30042] [MEM] Free: 150188 bytes, Total: 232092 bytes, Min Free: 150092 bytes
[30042] [IDLE] Idle time: 99.63% (CPU load: 0.37%)
[40067] [MEM] Free: 150188 bytes, Total: 232092 bytes, Min Free: 150092 bytes
[40067] [IDLE] Idle time: 99.62% (CPU load: 0.38%)

master:
[20012] [MEM] Free: 195016 bytes, Total: 231532 bytes, Min Free: 132460 bytes
[20012] [IDLE] Idle time: 98.53% (CPU load: 1.47%)
[30017] [MEM] Free: 195016 bytes, Total: 231532 bytes, Min Free: 132460 bytes
[30017] [IDLE] Idle time: 98.53% (CPU load: 1.47%)
[40022] [MEM] Free: 195016 bytes, Total: 231532 bytes, Min Free: 132460 bytes
[40022] [IDLE] Idle time: 98.53% (CPU load: 1.47%)
```

While this is a x3.8 reduce in CPU usage, it doesn't translate to the
same amount of battery life extension in real life. The reasons are:
1. The CPU is not shut down completely
2. freeRTOS tick is still running (however, I planned to experiment with
tickless functionality)
3. Current leakage to other components, for example: voltage dividers,
eink screen, SD card, etc

A note on
[light-sleep](https://docs.espressif.com/projects/esp-idf/en/stable/esp32c3/api-reference/system/sleep_modes.html)
functionality: it is not possible in our use case because:
- Light-sleep for 50ms introduce too much overhead on wake up, it has
negative effect on battery life
- Light-sleep for longer period doesn't work because the ADC GPIO
buttons cannot be used as wake up source

## Testing (duration = 6 hrs)

To test this, I patched the `CrossPointSettings::getSleepTimeoutMs()` to
always returns a timeout of 6 hrs. This allow me to leave the device
idle for 6 hrs straight.

- On master branch, 6 hrs costs 26% battery life (100% --> 74%), meaning
battery life is ~23 hrs
- With this PR, 6 hrs costs 20% battery life (100% --> 80%), meaning
battery life is ~30 hrs

So in theory, this extends the battery by about 7 hrs. Even with some
error margin added, I think 3 hrs increase is possible with a normal
usage setup (i.e. only read ebooks, no wifi)

## Additional Context

Would appreciate if someone can test this with an oscilloscope.

---

### AI Usage

While CrossPoint doesn't have restrictions on AI tools in contributing,
please be transparent about their usage as it
helps set the right context for reviewers.

Did you use AI tools to help write this code? **NO**
2026-02-12 09:49:05 +01:00
Xuan-Son Nguyen 7f40c3f477 feat: add HalStorage (#656)
## Summary

Continue my changes to introduce the HAL infrastructure from
https://github.com/crosspoint-reader/crosspoint-reader/pull/522

This PR touches quite a lot of files, but most of them are just name
changing. It should not have any impacts to the end behavior.

## Additional Context

My plan is to firstly add this small shim layer, which sounds useless at
first, but then I'll implement an emulated driver which can be helpful
for testing and for development.

Currently, on my fork, I'm using a FS driver that allow "mounting" a
local directory from my computer to the device, much like the `-v` mount
option on docker. This allows me to quickly reset `.crosspoint`
directory if anything goes wrong. I plan to upstream this feature when
this PR get merged.

---

### AI Usage

While CrossPoint doesn't have restrictions on AI tools in contributing,
please be transparent about their usage as it
helps set the right context for reviewers.

Did you use AI tools to help write this code? NO
2026-02-09 07:29:14 +11:00
Xuan-Son Nguyen 6909f127b4 perf: optimize drawPixel() (#748)
## Summary

Ref https://github.com/crosspoint-reader/crosspoint-reader/pull/737

This PR further reduce ~25ms from rendering time, testing inside the
Setting screen:

```
master:
[68440] [GFX] Time = 73 ms from clearScreen to displayBuffer

PR:
[97806] [GFX] Time = 47 ms from clearScreen to displayBuffer
```

And in extreme case (fill the entire screen with black or gray color):

```
master:
[1125] [   ] Test fillRectDither drawn in 327 ms
[1347] [   ] Test fillRect drawn in 222 ms

PR:
[1334] [   ] Test fillRectDither drawn in 225 ms
[1455] [   ] Test fillRect drawn in 121 ms
```

Note that
https://github.com/crosspoint-reader/crosspoint-reader/pull/737 is NOT
applied on top of this PR. But with 2 of them combined, it should reduce
from 47ms --> 42ms

## Details

This PR based on the fact that function calls are costly if the function
is small enough. For example, this simple call:

```
  int rotatedX = 0;
  int rotatedY = 0;
  rotateCoordinates(x, y, &rotatedX, &rotatedY);
```

Generated assembly code:

<img width="771" height="215" alt="image"
src="https://github.com/user-attachments/assets/37991659-3304-41c3-a3b2-fb967da53f82"
/>

This adds ~10 instructions just to prepare the registers prior to the
function call, plus some more instructions for the function's
epilogue/prologue. Inlining it removing all of these:

<img width="1471" height="832" alt="image"
src="https://github.com/user-attachments/assets/b67a22ee-93ba-4017-88ed-c973e28ec914"
/>

Of course, this optimization is not magic. It's only beneficial under 3
conditions:
- The function is small, not in size, but in terms of effective
instructions. For example, the `rotateCoordinates` is simply a jump
table, where each branch is just 3-4 inst
- The function has multiple input arguments, which requires some move to
put it onto the correct place
- The function is called very frequently (i.e. critical path)

---

### AI Usage

While CrossPoint doesn't have restrictions on AI tools in contributing,
please be transparent about their usage as it
helps set the right context for reviewers.

Did you use AI tools to help write this code? **NO**
2026-02-09 05:07:35 +11:00
Xuan-Son Nguyen b45eaf7ded feat: optimize fillRectDither (#737)
## Summary

This PR optimizes the `fillRectDither` function, making it as fast as a
normal `fillRect`

Testing code:

```cpp
  {
    auto start_t = millis();
    renderer.fillRectDither(0, 0, renderer.getScreenWidth(), renderer.getScreenHeight(), Color::LightGray);
    auto elapsed = millis() - start_t;
    Serial.printf("[%lu] [   ] Test fillRectDither drawn in %lu ms\n", millis(), elapsed);
  }

  {
    auto start_t = millis();
    renderer.fillRect(0, 0, renderer.getScreenWidth(), renderer.getScreenHeight(), true);
    auto elapsed = millis() - start_t;
    Serial.printf("[%lu] [   ] Test fillRect drawn in %lu ms\n", millis(), elapsed);
  }
```

Before:

```
[1125] [   ] Test fillRectDither drawn in 327 ms
[1347] [   ] Test fillRect drawn in 222 ms
```

After:

```
[1065] [ ] Test fillRectDither drawn in 238 ms
[1287] [ ] Test fillRect drawn in 222 ms
```

## Visual validation

Before:

<img width="415" height="216" alt="Screenshot 2026-02-07 at 01 04 19"
src="https://github.com/user-attachments/assets/5802dbba-187b-4d2b-a359-1318d3932d38"
/>

After:

<img width="420" height="191" alt="Screenshot 2026-02-07 at 01 36 30"
src="https://github.com/user-attachments/assets/3c3c8e14-3f3a-4205-be78-6ed771dcddf4"
/>

## Details

The original version is quite slow because it does quite a lot of
computations. A single pixel needs around 20 instructions just to know
if it's black or white:

<img width="1170" height="693" alt="Screenshot 2026-02-07 at 00 15 54"
src="https://github.com/user-attachments/assets/7c5a55e7-0598-4340-8b7b-17307d7921cb"
/>

With the new, templated and more light-weight approach, each pixel takes
only 3-4 instructions, the modulo operator is translated into bitwise
ops:

<img width="1175" height="682" alt="Screenshot 2026-02-07 at 01 47 51"
src="https://github.com/user-attachments/assets/4ec2cf74-6cc0-4b5b-87d5-831563ef164f"
/>

---

### AI Usage

While CrossPoint doesn't have restrictions on AI tools in contributing,
please be transparent about their usage as it
helps set the right context for reviewers.

Did you use AI tools to help write this code? **NO**
2026-02-09 05:07:13 +11:00
Xuan-Son Nguyen a87eacc6ab perf: optimize drawPixel() (#748)
## Summary

Ref https://github.com/crosspoint-reader/crosspoint-reader/pull/737

This PR further reduce ~25ms from rendering time, testing inside the
Setting screen:

```
master:
[68440] [GFX] Time = 73 ms from clearScreen to displayBuffer

PR:
[97806] [GFX] Time = 47 ms from clearScreen to displayBuffer
```

And in extreme case (fill the entire screen with black or gray color):

```
master:
[1125] [   ] Test fillRectDither drawn in 327 ms
[1347] [   ] Test fillRect drawn in 222 ms

PR:
[1334] [   ] Test fillRectDither drawn in 225 ms
[1455] [   ] Test fillRect drawn in 121 ms
```

Note that
https://github.com/crosspoint-reader/crosspoint-reader/pull/737 is NOT
applied on top of this PR. But with 2 of them combined, it should reduce
from 47ms --> 42ms

## Details

This PR based on the fact that function calls are costly if the function
is small enough. For example, this simple call:

```
  int rotatedX = 0;
  int rotatedY = 0;
  rotateCoordinates(x, y, &rotatedX, &rotatedY);
```

Generated assembly code:

<img width="771" height="215" alt="image"
src="https://github.com/user-attachments/assets/37991659-3304-41c3-a3b2-fb967da53f82"
/>

This adds ~10 instructions just to prepare the registers prior to the
function call, plus some more instructions for the function's
epilogue/prologue. Inlining it removing all of these:

<img width="1471" height="832" alt="image"
src="https://github.com/user-attachments/assets/b67a22ee-93ba-4017-88ed-c973e28ec914"
/>

Of course, this optimization is not magic. It's only beneficial under 3
conditions:
- The function is small, not in size, but in terms of effective
instructions. For example, the `rotateCoordinates` is simply a jump
table, where each branch is just 3-4 inst
- The function has multiple input arguments, which requires some move to
put it onto the correct place
- The function is called very frequently (i.e. critical path)

---

### AI Usage

While CrossPoint doesn't have restrictions on AI tools in contributing,
please be transparent about their usage as it
helps set the right context for reviewers.

Did you use AI tools to help write this code? **NO**
2026-02-09 05:05:42 +11:00
Xuan-Son Nguyen 76908d38e1 feat: optimize fillRectDither (#737)
## Summary

This PR optimizes the `fillRectDither` function, making it as fast as a
normal `fillRect`

Testing code:

```cpp
  {
    auto start_t = millis();
    renderer.fillRectDither(0, 0, renderer.getScreenWidth(), renderer.getScreenHeight(), Color::LightGray);
    auto elapsed = millis() - start_t;
    Serial.printf("[%lu] [   ] Test fillRectDither drawn in %lu ms\n", millis(), elapsed);
  }

  {
    auto start_t = millis();
    renderer.fillRect(0, 0, renderer.getScreenWidth(), renderer.getScreenHeight(), true);
    auto elapsed = millis() - start_t;
    Serial.printf("[%lu] [   ] Test fillRect drawn in %lu ms\n", millis(), elapsed);
  }
```

Before:

```
[1125] [   ] Test fillRectDither drawn in 327 ms
[1347] [   ] Test fillRect drawn in 222 ms
```

After:

```
[1065] [ ] Test fillRectDither drawn in 238 ms
[1287] [ ] Test fillRect drawn in 222 ms
```

## Visual validation

Before:

<img width="415" height="216" alt="Screenshot 2026-02-07 at 01 04 19"
src="https://github.com/user-attachments/assets/5802dbba-187b-4d2b-a359-1318d3932d38"
/>

After:

<img width="420" height="191" alt="Screenshot 2026-02-07 at 01 36 30"
src="https://github.com/user-attachments/assets/3c3c8e14-3f3a-4205-be78-6ed771dcddf4"
/>

## Details

The original version is quite slow because it does quite a lot of
computations. A single pixel needs around 20 instructions just to know
if it's black or white:

<img width="1170" height="693" alt="Screenshot 2026-02-07 at 00 15 54"
src="https://github.com/user-attachments/assets/7c5a55e7-0598-4340-8b7b-17307d7921cb"
/>

With the new, templated and more light-weight approach, each pixel takes
only 3-4 instructions, the modulo operator is translated into bitwise
ops:

<img width="1175" height="682" alt="Screenshot 2026-02-07 at 01 47 51"
src="https://github.com/user-attachments/assets/4ec2cf74-6cc0-4b5b-87d5-831563ef164f"
/>

---

### AI Usage

While CrossPoint doesn't have restrictions on AI tools in contributing,
please be transparent about their usage as it
helps set the right context for reviewers.

Did you use AI tools to help write this code? **NO**
2026-02-08 14:59:13 +03:00
Xuan-Son Nguyen db659f3ea2 fix: move http upload state to heap (#657)
## Summary

The main motivation behind this PR was because `uploadBuffer` is
statically allocated, but only used when web server is enabled. This
results in 4KB of memory sitting idle most of the time.

As expected, 4KB of initial RAM is freed with this PR:

```
master:
RAM:   [===       ]  32.5% (used 106508 bytes from 327680 bytes)

PR:
RAM:   [===       ]  31.2% (used 102276 bytes from 327680 bytes)
```

## Additional Context

This also highlights the importance of only using statically-allocated
buffer when absolutely needed (for example, if the component is active
most of the time). Otherwise, it makes more sense to tie the buffer's
life cycle to its activity.

---

### AI Usage

While CrossPoint doesn't have restrictions on AI tools in contributing,
please be transparent about their usage as it
helps set the right context for reviewers.

Did you use AI tools to help write this code? NO
2026-02-05 21:03:19 +11:00
Xuan-Son Nguyen da4d3b5ea5 feat: add HalDisplay and HalGPIO (#522)
## Summary

Extracted some changes from
https://github.com/crosspoint-reader/crosspoint-reader/pull/500 to make
reviewing easier

This PR adds HAL (Hardware Abstraction Layer) for display and GPIO
components, making it easier to write a stub or an emulated
implementation of the hardware.

SD card HAL will be added via another PR, because it's a bit more
tricky.

---

### AI Usage

While CrossPoint doesn't have restrictions on AI tools in contributing,
please be transparent about their usage as it
helps set the right context for reviewers.

Did you use AI tools to help write this code? **NO**
2026-01-28 04:50:15 +11:00