[Pete]

Hi Jason –

Thanks so much for the example code!

Your code works perfectly for me. With this, I now have a good example, and can work to fix my code.

I really appreciate you taking the time to help this amateur out!

[Pete]

Thanks for looking at my code snippets, Jason –

I have other code that uses the same format and works fine, so I don’t think it has to do with my check on MDOT_OK. I did change my test to:

if ((ret = dot->readUserBackupRegister(0, sleeptime)) == true)

But no difference.

The problem is that it successfully reads and writes, but the actual data is no good.

When waking from sleep, I get –
Read in sleeptime as 134219489

Even though I have written the register to be 1, it still reads as 134219489.

Register 1 is no better, it’s just a 0, and I cannot change it.

[Pete]

Are there no Multitech devs around there that help a guy out?

[Pete]

I’m sorry, I was not very clear, and had typos. Both readUserBackRegister and write fail.

Beginning code:

    if ((ret = dot->readUserBackupRegister(0, sleeptime)) != mDot::MDOT_OK){ 
        pc.printf("Failed to read - sleeptime is %d\r\n",sleeptime); 
        } else {
            pc.printf("Read in sleeptime as %d\r\n",sleeptime); 
        }
    if(sleeptime > 2000) sleeptime = 1; // sleeptime is some crazy number
    pc.printf("Sleep set for %d Minutes\n\r", sleeptime);  
     

End Code

            
            if ((ret = dot->writeUserBackupRegister(0, sleeptime)) != mDot::MDOT_OK){ 
                    pc.printf("Failed to write sleeptime\r\n"); 
                    } else {
                          pc.printf("Wrote sleeptime as %d\r\n",sleeptime); 
                    }
                

Output is

Failed to read - sleeptime is 134219489
Sleep set for 1 Minutes
.
.
.
Failed to write sleeptime
Sleeping 60 seconds or 1 minutes.

• This reply was modified 7 years, 3 months ago by Pete.

[Pete]

Anyone?

This is an mDot, that I’m trying to keep persistent variables across sleep.

[Pete]

Hi Mike –

Sorry, I should have mentioned – I’m on Win 10 Pro, on a Microsoft Surface, no less.

I’ve done plenty of programming mbed+NXP so I think my environment is good otherwise.

[Author]

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