I am trying to use SPI from OMAP L138 to communicate with 3 external cards.
At a speed of 10 MHz and trying to transfer 8 bytes from each of 3 I can't get that under a milisecond and with load of processor over 1.
I am using the spidev interface and 3 SPI_IOC_MESSAGE using gpio as chip select.
Anyone have experiences of load increase when using SPI ? Can be a problem of DMA ?
Thanks.