CCS/TMS320F28069F: I have a question with SPI Communication Code.

InGwon Jo

Prodigy 90 points

Part Number: TMS320F28069F

Tool/software: Code Composer Studio

Hi,

I'm studying 28069DSP SPI function.

When i running with Control-Suite Example_2806xSpi_FFDLB, it is well operated. (the SPI code in for(;;) )

But, I do this code in adc_isr, the code is stop at ''while(SpiaRegs.SPIFFRX.bit.RXFFST !=1) { }'' which is in the code below.

{
// Transmit data
spi_xmit(sdata);
// Wait until data is received
while(SpiaRegs.SPIFFRX.bit.RXFFST !=1) { }
// Check against sent data

rdata = SpiaRegs.SPIRXBUF;
//if(rdata != sdata) error();
sdata++;
}

I checked the adc_isr is well operating without SPI Code.

How can i solve this problem?

thanks.

over 7 years ago

0 Whitney Dewey over 7 years ago

TI__Guru 54185 points

Are you using the same SPI configuration as the Example_2806xSpi_FFDLB example? Are you testing it with loopback enabled or are you communicating with another device?

Whitney

0 InGwon Jo over 7 years ago in reply to Whitney Dewey

Prodigy 90 points

Hi Whitney,
Yes, i use same SPI configuration.
And, i do not communicating with another device and enable the loopback.

0 Whitney Dewey over 7 years ago in reply to InGwon Jo

TI__Guru 54185 points

If you check the value of RXFFST in the registers window, what is the value? Is it zero? Or is it >1?

Whitney

0 Whitney Dewey over 7 years ago in reply to Whitney Dewey

TI__Guru 54185 points

Any progress with your debug?

Whitney

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CCS/TMS320F28069F: I have a question with SPI Communication Code.