Single write digital outputs with read-back

[smt87]

Hi,

I want to use GPOERB_SWTEST_CMP feature in safety manual to check if the read data equals the written data. Which register of s32k146 should I activate for this feature?

[JRoberto]

@smt87 

The GPOERB_SWTEST_CMP is a safety function that should be implemented by software. There is no register called GPOERB_SWTEST_CMP to do it automatically 

Best Regards.

[smt87]

How can I implement this feature? Is there any sample code for this?

[JRoberto · Accepted solution]

@smt87 

Well, I can't tell you the best way to implemented because it depends on your specific needs, but it could be as straight forward as reading back the pin after it has been written and compare this pin with the intended value you wanted to write in the first place.

Best Regards!