Build & Formatting

[ModischFabrications]

• fix formatter crash on new (clang-v13) format. Probably due to invalid reference to different version of clang.
• Flash Reader self-reports 4MB, Uploader assumes 1MB. Might be wrong board definition.

[ModischFabrications]

Seems like it's a problem of integrating external SPI RAM into local memory map: https://community.platformio.org/t/a-question-about-board-configuration-files-with-esp32/21877/6

Solution seems to be a menuconfig tool that doesn't work for me. The ominous sdkconfig file from the HUB75 examples might be a way.

[ModischFabrications]

https://docs.platformio.org/en/latest/platforms/espressif32.html#external-ram-psram -> sadly, same size as before.

[ModischFabrications]

"Auto-detected Flash size: 4MB" from upload log

[ModischFabrications]

Getting close now:

RAM: [== ] 15.9% (used 52152 bytes from 327680 bytes)
Flash: [========= ] 93.2% (used 1221122 bytes from 1310720 bytes)

[ModischFabrications]

Went over now.

Seems like partition tables are used to increase usable space: platformio/platform-espressif32#309

[ModischFabrications]

Great overview in espressif/arduino-esp32#4551 (comment), seems like the full 4MB are already used, it's just partitioned into the different areas. Using no_ota.csv should save some space, that's probably enough.

[ModischFabrications]

build_flags =
-DBOARD_HAS_PSRAM
-mfix-esp32-psram-cache-issue

are great, but they seem to be a board-specific thing and are set already. 4MB of this board seems to be onboard only, so this was a pointless search. Use

void printRAM(){
// useful to validate PSRAM fix is running
Serial.printf("Total heap: %d\n", ESP.getHeapSize());
Serial.printf("Free heap: %d\n", ESP.getFreeHeap());
Serial.printf("Total PSRAM: %d\n", ESP.getPsramSize());
Serial.printf("Free PSRAM: %d\n", ESP.getFreePsram());
}

to check for size.