Question about DSPI for MPC5643L

[haotianwei1983]

Hello, everyone.

Recently i work on a project about communication between MPC5643L and TLE6204. And there is a problem that I set DSPI_2 as a master and just want to send a 16 bits data with 16 bit command.

after i operate following command:

DSPI_2.PUSHR.R = 0X08010000 | SendData16bit;

then i stay in while loop waiting for the TCF flag bit set.

while(DSPI_2.SR.B.TCF != 1)

{}

It will stay in wihile forever, according to the datasheet after sending a frame TCF will be set. But i don't get the right result.

Here is my whole project in attachment, hope someone kindly help me. Thank you!

Original Attachment has been moved to: vcu_5in1.zip

[davidtosenovjan · Accepted solution]

Before sending you are doing this:

DSPI_2.SR.B.EOQF = 0;

1) Flags are being cleared by 1.

2) .B instance should not be used at all because it would clear all flag set in the register. See following document, section 3.2:

http://www.nxp.com/files/32bit/doc/eng_bulletin/EB758.pdf

The correct solution is as follows:

#define DSPI_SR_EOQF  (0x10000000)

DSPI_2.SR..R = DSPI_SR_EOQF;

Let me know whether it is was the issue.

[haotianwei1983]

In the morning I test again get following conclusion:

1) As I set DPSI2 module as the project when run the chip the SCLK pin has no clock signal

2) I config A[1] pin as DPSI sout, but when the chip run, this pin will be pull to high woltage 3.3V

I think the DSPI module doesn't work so my config to DSPI2 is something wrong.

[davidtosenovjan]

You have disabled DSPI module - pay attention to DSPI_MCR[MDIS] bit.

[haotianwei1983]

Thank you!!!!

[haotianwei1983]

Hello, happy Chinese Spring Festaval. Sorry for checking your advise late.

I just try by

#define DSPI_SR_EOQF  (0x10000000)

DSPI_2.SR..R = DSPI_SR_EOQF;

but it still run in

while(DSPI_2.SR.B.TCF != 1)

waiting.

I am dault that why the TCF can not set, and i use scope to detect the SCK pin. The clock signal can be detect.

[haotianwei1983]

ok, I will take your advise and check the result. Thank you very much for your kindly help.