Fix SPI bus detach issue on ESP32-C3 with Arduino 3.x#176
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hallard wants to merge 1 commit intoLSatan:masterfrom
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Fix SPI bus detach issue on ESP32-C3 with Arduino 3.x#176hallard wants to merge 1 commit intoLSatan:masterfrom
hallard wants to merge 1 commit intoLSatan:masterfrom
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On ESP32-C3 with Arduino 3.x (IDF 5.x), SPI.end() fully detaches the SPI bus and releases GPIO pins. Since SpiStart()/SpiEnd() are called around every single SPI transaction, this causes the bus to be repeatedly torn down and rebuilt, which breaks GPIO pin assignments and hangs the firmware. Fix by: - Only calling SPI.begin() once (on first use) instead of every transaction - Removing SPI.end() from SpiEnd(), keeping only SPI.endTransaction() This fixes CC1101 operation on ESP32-C3 boards while remaining compatible with ESP32, ESP32-S3, and ESP8266. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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Summary
SPI.end()now fully detaches the SPI bus and releases GPIO pins on newer ESP32 Arduino coresSpiStart()/SpiEnd()wrap every single SPI transaction, this caused the bus to be repeatedly torn down and rebuilt, hanging the firmwareChanges
SpiStart(): Only callSPI.begin()andpinMode()once (first use), skip on subsequent callsSpiEnd(): RemoveSPI.end(), keep onlySPI.endTransaction()Testing
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