nRF52832 and nRF52840 GPIO questions

[samsam]

1.Cant make P0.09(NFC1) and P0.10(NFC2) outputs?

Tried both nRF52832 from PCA10040 and a BT module  with nRF52840 and on both cant make any of those pins outputs. Tried with code and from debugger at a stop point to config as output and set OUT high. Don’t see any error, but don’t have any output voltage. Tried other pins and everything works fine either way – from code or manually form debugger. (On PCA100400 tried and outputs on NFC antenna pins as I saw the Arduino headers are not connected)

Is there any specific settings to make  P9, P10 outputs or any limitations that I missed?

2.Is there way with SES in debug mode to see change on an input pin at debug point? The only way I found is to make a step, but is there a way to stay at the debug point, let say press a button and somehow to refresh the window that shows P0 or P1 IN registers?

Thanks

[Einar Thorsrud]

Hi,

The NFC pins (P0.09 and P0.10) are configured as NFC pins by default. You can make them GPIO's by defining CONFIG_NFCT_PINS_AS_GPIOS for your project, as described here.

[samsam]

Hi,

Thanks - is there any of other pins that need such special way to make them GPIOs?   

Any help on Segger ES for IN register?

[Einar Thorsrud]

Hi,

samsam said:

Thanks - is there any of other pins that need such special way to make them GPIOs?   

Not in the same way, but there are some other GPIO's that need special attention. You can see all details under pin assignments.

samsam said:

Any help on Segger ES for IN register?

Can you elaborate on the problem?

[samsam]

Problem with debug window for input (IN) registers P0 or P1 is that they are not updated while I am at a debug break point. Let say I'm debugging code and hit a break point and if  I for example press a button I don't see the change in the IN register. I have used to work with other IDEs for other microcontrollers and change in IOs can be seen right away even while I'm stopped at a debug break point.

In SES the only way to see the change for a button press for example is to press and hold the button and step away from the break point with STEP IN, STEP OUT, GO etc debug stepping command.

So the question is if there is a better way to see a change of an input while sitting/stopped at a breakpoint without step further in the code?

[Einar Thorsrud]

Hi,

I see. With SES, the registers are not updated "live", but it will be updated for instance when hitting a breakpoint. So when the breakpoint is hit, whatever is reflected in the register view was the state tat that time, like a snapshot. I am not aware of any way to get "live updates" on register changes in SES, unfortunately.

[samsam]

I don't pretend to be "live" but somehow without to leave the break point. There is some "Refresh" button on top of the Register view window, but I don't see it working at all :(

Regards

[Einar Thorsrud]

I see. I have not been able to refresh registers like that, unfortunately. You could ask in the SEGGER forum if you really need this, though.