SPI Communication of DSP28335

sudongpo2018

SPI Communication of DSP28335 [Copy link]

Since the SPI chip select pin of DSP28335 can only be pulled high after more than 20us after sending, the IO port is used to simulate SPISTE. The timing diagram obtained is as follows (sending two AA continuously), but the communication still cannot be completed. I don’t know where the problem lies

sudongpo2018

This is a zoomed in view of the last byte sent

Jacktang

TMS320F2833x, TMS320F2823x Digital Signal Controllers (DSCs) Datasheet

SPI register description document: http://www.ti.com/lit/ug/sprueu3a/sprueu3a.pdf

chenbingjy

What chip does your 28335 communicate with? Check the waveform timing to see if it is correct.