SPI test fails (inexplicably?!)

Wait....there's no internal loopback on this device is there? Which means I need a loopback cable...

Timothy,

I got the same error while running this example. We have someone from the software team resolving this issue.

Could it be because I have not connected the tx pin to the rx pin?

The CSL example was designed for the C5515 EVM not the C5505 eZdsp, that is why the program fails. You have to modify it to make it work with the C5505.

The reason that the CSL SPI example failed is because the C5505 eZdsp is using different EEPROM chip than the C5515 EVM and the VC5505 EVM. It causes the EEPROM write failure, therefore the SPI test failure. Generally speaking different EEPROM chips use the same read command, but each may has its own write commands. Since the C5505 eZdsp is released after the CSL 2.50 release, we did not test the SPI example on C5505 eZdsp.

We will make the adjustments for SPI example for C5505 eZdsp in next CSL release.

Best regards,

Ming

From the SPI Documentation: "Write to the command register (SPICMD2) to start the SPI write. The value you write SPICMD2 must
set CSNUM = 0 (chip-select 0 active), CLEN = 7 (8-bit character length), and CMD = 10b (write)."

The example supports this:

/* set start CMD - Write */
    CSL_FINS(CSL_SPI_REGS->SPICMD2,SPI_SPICMD2_CMD,0x02);

(csl_spi_example.c, line 213)

However, in the debugger, the register view says that 0x2 is reserved and 0x3 is write. Which is correct?

Hi Timothy,

According to the C5515 SPI programmer's guide (sprufo3.pdf), the 0x01 is read and 0x02 is write (page 29).

Best regards,

Ming