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feat(esp32s3): add PSRAM support#5554

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helvionics:de_esp32s3_psram
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feat(esp32s3): add PSRAM support#5554
digitalentity wants to merge 1 commit into
tinygo-org:devfrom
helvionics:de_esp32s3_psram

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@digitalentity

@digitalentity digitalentity commented Jul 24, 2026

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PSRAM support for ESP32-S3. Enabled via numa_psram_qspi and numa_psram_octal build tags.

  • OPI PSRAM was tested on ESP32-S3-WROOM-1U-N16R8
  • QSPI PSRAM not tested yet (I don't have the hardware)

Test on QSPI board with: ./build/tinygo flash -size=short -serial=uart -target=esp32s3-psram-qspi -monitor -panic=trap examples/psram

Test on OPI board with: ./build/tinygo flash -size=short -serial=uart -target=esp32s3-psram-octal -monitor -panic=trap examples/psram, should be getting something like this:

=== PSRAM Example ===
psramBuffer start address: 0x3D000000
psramBuffer size:          1048576 bytes
Writing test pattern to PSRAM...
Verifying test pattern...
SUCCESS: PSRAM 1MB read/write verification passed!

Partly fixes #3772

@digitalentity
digitalentity marked this pull request as draft July 24, 2026 22:00
Add runtime initialization, MMU layout, linker script mappings, and targets for ESP32-S3 Quad and Octal PSRAM.
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How to use esp32 psram?

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