Content originally posted in LPCWare by andypevy on Thu Apr 23 03:07:38 MST 2015
Hi,
I am using the demo ROM Based SPIM interrupt code to talk to a device.
I have set SPI0 up as follows :-
#define SPI_BITRATE (15000000)
/* Set SPI transfer configuration */
spimConfig.dXferBitRate = SPI_BITRATE;
spimConfig.mode = ROM_SPI_CLOCK_CPHA0_CPOL0;
spimConfig.lsbFirst = 0;
spimConfig.dataBits = 8;
spimConfig.PreDelay = 0;
spimConfig.PostDelay = 0;
spimConfig.FrameDelay = 0;
spimConfig.TransferDelay = 1;
The MCU is running at 96MHz.
I am seeing a byte taking 580nS to be transmitted which I would expect,
however, I am then seeing a delay of 5.6uS before the next byte gets sent.
Is this what I should expect ?.
Is there any way of reducing the inter byte delay ?.
Thanks,
Andy
