TMS320F28379D: TMS320F28379D controller interfacing with ENC28J60 issue SPI communication.

Hi Atul,

Atul Wagh said:

my MOSI pin signal not proper i see on DSO.

Can you please describe what is not proper about the signal? Is it sending the correct data but at a different baud rate? Is it not sending data at all? Is the data not what you expect? 

As a first step to debug, I would enable internal loopback and see if you can receive the correct data that you are transmitting.

Best Regards,

Marlyn

Hi Marlyn ,

My SPI pin Signals not getting proper as per timing diagram  .my spi configuration  is  correct or not.

Hi Atul,

I am not able to open up your project due to dependencies but I took a look at the individual files. It looks like your sysconfig file has a different configuration from your board.c file. Looking at the board.c file, this is what I found:

void SPI_init()
{
	//mySPI0 initialization
	SPI_disableModule(mySPI0_BASE);
	SPI_setConfig(mySPI0_BASE, DEVICE_LSPCLK_FREQ, SPI_PROT_POL0PHA1,
				  SPI_MODE_MASTER, 8000000, 	8);
	SPI_enableFIFO(mySPI0_BASE);
	SPI_setFIFOInterruptLevel(mySPI0_BASE, SPI_FIFO_TXEMPTY, SPI_FIFO_RXEMPTY);
	SPI_disableLoopback(mySPI0_BASE);
	SPI_setEmulationMode(mySPI0_BASE, SPI_EMULATION_STOP_AFTER_TRANSMIT);
	SPI_enableModule(mySPI0_BASE);
}

Within this you are configuring FIFO but not utilizing it in your empty_sysconfig_main.c file so I would disable FIFO if that is the case. The configuration you have setup is for Master with clock phase of 1 which corresponds to the following timing diagram (from the datasheet). Is this what you are observing?

Lastly, your sysconfig file has the STE polarity as active high, but based on the diagram above it looks like this needs to be active low (normal).

Best Regards,

Marlyn

Hi Marlyn ,

 We did this changes , and SPI test ON Saleae Application with logic analyzer .

I am getting following  timing diagram.

this miso line is empty .

i want following timing diagram.

Atul Wagh said:

this miso line is empty .

Not MISO , MOSI line is getting zero .

Hi Atul,

Just for debugging purposes, if you enable loopback, does that work for you?

Best Regards,

Marlyn