Hello there,
I do want to sent an 18 bytes frame to an SPI frame but with the Fss pin being kept low and clk always operating during the whole 18 bytes, as by the normal back to back transmissions the clk is only active while sending so there is some periods it is idle, will the DMA establish this frame shape and Is there an alternative method ?
HI,
The SSI module has a Frame hold feature that will hold the Fss signal active during the transfers. The master will begin the transfer with the SSIAdvFrameHoldEnable() to keep the Fss active during transfers and end with the SSIAdvDataPutFrameEnd() by which to de-assert the Fss. There is an example that uses the Fss hold feature and can be found in
C:\ti\TivaWare_C_Series-2.2.0.295\examples\boards\ek-tm4c129exl\ssi_quad_mode.
