arch/esp32_spi: Add check to see if the TX_FIFO is empty #15904
+13
−0
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Summary
arch/esp32_spi: Add check to see if the TX_FIFO is empty to avoid sending empty data
Impact
New Feature/Change: Issue fix (no new feature).
User Impact: No
Build Impact:No new Kconfig options or build system changes.
Hardware Impact: Only ESP32; other architectures unaffected.
Security: No
Compatibility: Backward-compatible; no breaking changes.
Testing
ESP32-DevKitC, NuttX with SPI configurations, ESP32 as SPI master device send data.