Bss not writeable after start (sporadic)

Question

Hello 
 
 i want use some .bss section via ghs pragmas for a bootloader jump var in retention ram. 
 but the vars inside my shared struct are only written sometimes. 
 A voltage reset helps it works in 30/100 cases. 
 But often my vars are not writable and seem to be locked.

JimB · Accepted Answer

The RAM on RH850 is ECC protected, and the ECC applies to 32-bit words. Consequently, you must initialize the RAM by writing every 32-bit RAM location before a 16-bit or 8-bit write would work correctly, this would need to be done for any reset type where the RAM does not retain its contents (see device U/M for more details).

Bss not writeable after start (sporadic)

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