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How to write a routine to continuously refresh flash/ram memory by using ECC?

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I am using the TMS570 HDK development kit. I am currently focusing on inducing fault-tolerance to this MCU for use in radiation susceptible environments.I plan to use memory scrubbing technique(memory read- use ECC- Write back)...one memory bank at a time. One of the engineers had suggested that it may be possible to program the internal state machine to achieve this objective. The other option is using the flash api to read, run ECC and write the data and ECC bits back to memory. How do I make program run periodically?  It is imperative that this process be continuous to prevent accumulation of errors.Please let me know if you need any additional information.


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