DA14683 Pre-emptive Links to documents:
Datasheet = https://www.renesas.com/tw/en/document/dst/da14683-datasheet?r=1600766
Hardware design guide = https://www.renesas.com/tw/en/document/apn/b-061-application-note-da1468x-application-hardware-design-guidelines?r=1600766
Platform Reference = https://www.renesas.com/tw/en/document/mas/um-b-044-da1468x-software-platform-reference?r=1600766
Software Dev Guide = www.renesas.com/.../um-b-056-da1468x-software-developers-guide
Custom DA14683 Board
Latest SDK = 220.127.116.111 (last updated in 2018)
1) "DA14683: Implementing a "soft power button". Push to sleep. Push again to wake."
2) "DA14683: How to troubleshoot what is blocking extended sleep modes?"
3) DA14683: Can't sleep with debugger attached, where in the SDK does it abort?
NOTE: Before anyone starts asking if these issues are custom hardware related, I can run both the pxp_reporter and BMS demos on my custom hardware, and both sleep with currents in the 300uA range. Given this information, if you still think this is still a hardware issue it would be helpful to maybe suggest some actual troubleshooting ideas instead of just saying "hardware issue".
To repeat my goal here, I'm trying to implement what is essentially a soft power button. Push to sleep. Push again to wake and reset the system. Because of this, I need to retain essentially nothing during sleep. I should be able to shut down everything. The only thing I really care about is being able to wake the system back up with the same button. The system will fully reboot on wake up.
I think I have finally got the DA14683 into a condition where there are no more parts of the system blocking sleep. I shut down everything I could find to shut down, and when I issue the "pm_set_sleep_mode(pm_mode_extended_sleep);" command it looks like it's actually doing it. Nothing is blocking anymore.
That's great, but the sleep current is still in the 3-6mA range. This is too high. Occasionally, after about 45 seconds or so it will drop down to about 600uA. This is still high, but barely acceptable. Sometimes it never drops down and stays in the 3-6mA range.
1) How can I troubleshoot what is pulling current while in sleep mode?
Just a quick update to close this issue.
Turns out the issue was caused by the touch screen controller chip on the display I'm using. The (rather poor) data sheet for the controller chip (it came attached…
I turned on "#define CPM_USE_TIMING_DEBUG (1)" and set up the GPIO.
Ch2 (Light Blue) = Sleep Enter
Ch1(yellow) = Sleep Exit
Ch4(dark blue) = current
The following plot is showing that when the system is stuck in high current sleep mode, it's actually going in and out of sleep every 2ms:
I'm not sure what is waking up the system. Also I'm not sure why the current never falls below about 6mA.
2) How can I determine what is waking up the system every 2ms?
2) How can I determine specifically what is waking up the system every 2ms?
3) Would having the UART retargeted have a negative effect on the sleep system?
Also, here is a scope shot of the system when it does drop into a lower current sleep mode:
Same scope setup as above.
Note the sleep period is now about 1 second, and the minimum current is around 400uA.
Does this help at all to make sense of the situation?
Ping. Happy Tuesday