CCS/TMS320F28388D: Convert from internal loopback to external loopback

Bob Snyder1

Tool/software: Code Composer Studio

I would like to take the following program example: mcbsp_ex4_spi_loopback and convert it to loop back externally. It seems to me that I should just comment out the line in the code that reads:

//
// Enable DLB mode. Comment out for non-DLB mode.
//
McBSP_enableLoopback(MCBSPA_BASE);

I'm probably missing the obvious but I looked for a clock signal and data on the GPIO pins and I have nothing.

Thanks in advance,

Bob

over 6 years ago

0 Vasudha Bhadoria over 6 years ago

TI__Genius 10845 points

Hi,

Please check the GPIO configurations and the external connections in the code.

Thanks

Vasudha

0 Vasudha Bhadoria over 6 years ago in reply to Vasudha Bhadoria

TI__Genius 10845 points

Hi,

The example mentioned above configures the McBSP instance as McBSP master. I think you will have to configure the SPI slave separately for external loopback. Either configure another McBSP instance as slave or use any SPI module available as slave. You can refer to mcbsp ex5 to refer to McBSP external loopback related configurations.

Thanks

Vasudha

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CCS/TMS320F28388D: Convert from internal loopback to external loopback