https://devzone.nordicsemi.com/f/nordic-q-a/34857/spi-pack-of-length-in-sdk-11-0hi, The SPI pack&#39;s maxsize is 255? How to change the SPI pack length.en-USTelligent Community 13Fri, 22 Jun 2018 06:08:55 GMThttps://devzone.nordicsemi.com/thread/137196?ContentTypeID=1Fri, 22 Jun 2018 06:08:55 GMT137ad170-7792-4731-bb38-c0d22fbe4515:ece4670c-18a7-418f-8dc7-9ed0476fbfc9pyz<p>en, I get it.</p> <p>Thank you</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/133846?ContentTypeID=1Tue, 29 May 2018 13:39:09 GMT137ad170-7792-4731-bb38-c0d22fbe4515:dc465e71-cb5c-4791-90d3-d4cbd2667e05Einar Thorsrud<p>Hi,</p> <p>Which device are you using? The maximum of 255 bytes is a HW limitation in the nRF52 SPIM peripheral, where the&nbsp;RXD.MAXCNT,&nbsp;RXD.AMOUNT, TXD.MAXCNT and TXD.AMOUNT all are 8 bit fields. There is no way to increase the transaction size in that case, but you can split up longer transactions if needed.</p> <p>(There is no such limitation in the SPI peripheral (no DMA), but the unified driver still uses uint8_t for length, so you cannot achieve longer transactions without modifying the driver.)</p><div style="clear:both;"></div>