Has anyone managed to create demo code making use of page transfer between FLASH device into SAMD21 memory and vice versa?
May I try out this code, alternatively send me SPI transaction waveform to show how close between two SCLK 8 bit frame while running on 4MHz SCLK and 8MHz MCU/Perpherial.
Based on a direct register (not using ASF 3.44 which is two time slower), It shown transfer of 6 byte while /CS is LOW (1 byte command, 3 byte address and two byte read data) which take 46uSec. This is based on 4MHz SCLK with 8MHz MCU and Perpherial (low power). Would DMA-SPI transfer improve this any more (without changing the clock).
I hear it not well documented and lack demo code for this. I have done DMA before for other projects (NXP/TI) which has demo code and better documentation on how to use DMA.