Why does SRIO need POR to rerun examples?

tscheck

It has been observed that when using the MCSDK SRIO examples on the EVM, that the example will run successfully the first time, but when trying to reload the example it will not work after a system reset in CCS or a board reset. The only thing that works is to completely power down the board and reload. Why?

over 13 years ago

0 tscheck over 13 years ago

TI__Mastermind 23525 points

The reason for this is behavior is that the C6670 and C6678 internal boot ROM enables the SRIO reset isolation in the Power Sleep Controller (PSC) SRIO Module Control Register (0x02350A2C). It is enabled by the ROM in all boot modes, including "no boot" or emulation boot. So, to avoid having to power cycle the board to rerun the examples, be sure to disable bit 12 of this register before you reset, either in CCS by modifying the memory contents, or by adding this step to your code initialization.

Regards,

Travis

0 jsobota over 13 years ago in reply to tscheck

TI__Intellectual 995 points

Following is some example code that can be placed within the SRIO device initialization code that is executed for all the SRIO example and test projects to disable reset isolation mode.

/* CSL PSC Module */

#include <ti/csl/csl_pscAux.h>

int32_t SrioDevice_init (void)

}

...

/* Get the CSL SRIO Handle. */

hSrio = CSL_SRIO_Open (0);

if (hSrio == NULL)

return -1;

/* Code to disable SRIO reset isolation */

if (CSL_PSC_isModuleResetIsolationEnabled(CSL_PSC_LPSC_SRIO))

CSL_PSC_disableModuleResetIsolation(CSL_PSC_LPSC_SRIO);

...

}

The code was put right after CSL_SRIO_Open(0) but it could go anywhere within the function.

Justin

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Why does SRIO need POR to rerun examples?