AURIX™ Forum Discussions

[User16898]

Hi,
Ive got problem with copying redundancy data to standby RAM:

According to user manual reserved data is another address i should read value from the store it back to reserved_data, but it seems like this address is corrupted or not exist.
Every time I try to assign data from reserved_data address trap occur( for all reserved_data).
Trap details are class 4 and TIN 2 which mean data error(DSE, tc1.6 architecture datasheet), but I cannot figure out why it's happening.
reserved_data values are always the same so I assume they are correct addresses.
Endinit protection is also disabled.

How to solve this problem?
I work on Tc222L



RESERVED_DATA_ACCEPTANCE_VALUE_X are 0xFFFFFF and 0x0

[cwunder]

Here is the code snippet that I used:

void CopyStandbyRedundancyData(void){
	uint32_t *src = (uint32_t *)0xD0002000;
	volatile uint32_t data;


	/* Preparation before to enter Stand-by mode */


	/* • read sequentially 16 words from the “reserved area” in CPU0_DSPR starting
	 *   at address D000’2000H
	 * • for any word check either it equals FFFF FFFFH or zero.
	 *   – if yes - skip it and go to the next reserved location
	 *   – if no
	 *      - use this word as 32-bit address, read the data from that address and
	 *        store this data back into the same reserved location
	 *   - go to the next reserved location
	 */
	for (uint32_t i = 0; i < 16; i++)
	{
		data = *src;
		if ((0 == data) || (0xFFFFFFFF == data))
		{
			/*ignore and increment pointer */
			src++;
		}
		else
		{


			/*need to move data*/
			*src = *(uint32_t *) (data);
			src++;
		}
	}


	__isync();
	__dsync();
}

[User16898]

hi,
Thanks for quick response.

what

__isync();
__dsync();

function does ?