I have attached my sample project with STM32H7https://1drv.ms/u/s!AuUAN7PWAxFS8l9pJ-mzXLp1vpXc?e=oFnJSXIn short, The basic function HAL_SPI_Transmit(&hspi1, aTxBuffer, 2, 1) work fine but it took a long time.For that reason, I tried to use HAL_SPI_Tr...