'Cannot clone nRF52840 to reproduce low deep sleep current
I currently have firmware that can reach an average deep sleep current of ~130uA. I can reach this level reproducibly on one of the boards I have.
Trouble is, when I try to clone this chip onto other chips using the nRF Programmer (Connect) app, I get extremely high power consumption, average of ~20mA at all times, seems the device doesn't reach deep sleep properly. Tried this on several other boards, so I don't believe it's simply a problem of something shorting. Strangely, the application just runs fine, the current is just several times normal for the same functionality.
Does anyone have any ideas on how I can truly clone the flash of one device, onto another? Clearly the "save as file" on nRF Connect isn't doing this. Erasing all and reuploading, starting from a blank chip and writing,
FYI I'm using the nRF52840 module by Raytac (MDBT50Q), implemented on a custom board. This board SHOULD be capable of going down to ~33uA, which I have observed in the past with this very board. By some combination of erasing all, reprogramming, setting the 3.3V logic level(nrfjprog --memwr 0x10001304 --val 5), etc,
Solution 1:[1]
For posterity, I did actually find the solution! For anyone else in a similar boat to me, the winning command is:
nrfjprog.exe --readcode --readuicr --readram [filename.hex]
Apparently, the --readram was the winning flag, as without it the sketch simply doesn't run at the same current consumption for whatever reason. But now, I can reproducibly image and transfer identical firmware, which was what I was after.
Sources
This article follows the attribution requirements of Stack Overflow and is licensed under CC BY-SA 3.0.
Source: Stack Overflow
| Solution | Source |
|---|---|
| Solution 1 | cMod |