Oooops....it actually worked! The problem was that the spi_transaction_t variable was a local one and the spi_device_polling_end function was called in a different function than spi_device_polling_start, so it was removed from the stack but somehow the driver needs it to store results of the transac...

Hi all, I'm trying to achieve very high speed in controlling a 4-PIN (SPI) LED strip with an ESP32-S3. The strip only receives messages from SPI, it never replies, so it only has 2 pins for the SPI: MOSI and CLK. In order to halve the communication time between the ESP32-S3 and the strip i decided t...

SOLVED!!!

https://github.com/touchgadget/esp32-us ... /issues/12