8000 Reduce USB static buffers for ESP32-S2 by tannewt · Pull Request #10293 · adafruit/circuitpython · GitHub
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Reduce USB static buffers for ESP32-S2 #10293

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Merged
merged 1 commit into from
Apr 25, 2025
Merged

Reduce USB static buffers for ESP32-S2 #10293

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11 changes: 10 additions & 1 deletion ports/espressif/Makefile
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Original file line number Diff line number Diff line change
Expand Up @@ -360,10 +360,19 @@ CFLAGS += \
-DCFG_TUD_TASK_QUEUE_SZ=32
endif
ifeq ($(CIRCUITPY_USB_DEVICE),1)
ifeq ($(IDF_TARGET),esp32s2)
# Make more room in internal RAM on the S2.
CFLAGS += \
-DCFG_TUD_CDC_RX_BUFSIZE=128 \
-DCFG_TUD_CDC_TX_BUFSIZE=128 \
-DCFG_TUD_MSC_BUFSIZE=1024
else
CFLAGS += \
-DCFG_TUD_CDC_RX_BUFSIZE=1024 \
-DCFG_TUD_CDC_TX_BUFSIZE=1024 \
-DCFG_TUD_MSC_BUFSIZE=4096 \
-DCFG_TUD_MSC_BUFSIZE=4096
endif
CFLAGS += \
-DCFG_TUD_MIDI_RX_BUFSIZE=128 \
-DCFG_TUD_MIDI_TX_BUFSIZE=128 \
-DCFG_TUD_VENDOR_RX_BUFSIZE=128 \
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4 changes: 3 additions & 1 deletion supervisor/shared/usb/tusb_config.h
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Original file line number Diff line number Diff line change
Expand Up @@ -172,8 +172,10 @@ extern "C" {
#endif

// Size of buffer to hold descriptors and other data used for enumeration
// CircuitPython itself is 284 bytes of configuration descriptor when both CDC endpoints are
// enabled, plus 4 bytes for alignment.
#ifndef CFG_TUH_ENUMERATION_BUFSIZE
#define CFG_TUH_ENUMERATION_BUFSIZE 512
#define CFG_TUH_ENUMERATION_BUFSIZE (284 + 4)
#endif

#if CIRCUITPY_USB_KEYBOARD_WORKFLOW
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