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fix: prevent ESP32 KISS modem stalls under USB backpressure

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Switch ESP32-S3 KISS modem environments to HWCDC and move outbound KISS writes to a non-blocking queued frame path so loop() and TX completion keep progressing when the host reads slowly. Add native backpressure regression tests and correct the native_kiss_modem test filter so this suite runs directly with pio test.
This commit is contained in:
ViezeVingertjes
2026-07-18 22:43:55 +02:00
parent 795989b918
commit fb2c61f862
15 changed files with 701 additions and 46 deletions
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variants/heltec_v4/platformio.ini
+5
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@@ -432,5 +432,10 @@ lib_deps =
[env:heltec_v4_kiss_modem]
extends = Heltec_lora32_v4
build_unflags =
-DARDUINO_USB_MODE=0
build_flags =
${Heltec_lora32_v4.build_flags}
-DARDUINO_USB_MODE=1
build_src_filter = ${Heltec_lora32_v4.build_src_filter}
+<../examples/kiss_modem/>