Keep nRF52832DK button pressed could result in high power consumption!

[jiurifei]

Hi all,

       I am using nRF52832 DK to do some tests about power consumption. And I am facing a problem that every time I pressed the button and kept it down, the current would rise to 230uA. The button has been configured as a gpiote interruption, and its configuration is below:

#define BUTTON_PIN_CONFIG  ((GPIO_PIN_CNF_SENSE_Low << GPIO_PIN_CNF_SENSE_Pos)    | \
                           (GPIO_PIN_CNF_DRIVE_S0S1 << GPIO_PIN_CNF_DRIVE_Pos)    | \
                           (GPIO_PIN_CNF_PULL_Pullup << GPIO_PIN_CNF_PULL_Pos)    | \
                           (GPIO_PIN_CNF_INPUT_Connect << GPIO_PIN_CNF_INPUT_Pos) | \
                           (GPIO_PIN_CNF_DIR_Input << GPIO_PIN_CNF_DIR_Pos))

I have inspected all the relevant registers and got no answer. So, I am wondering whether it is a hardware problem? 

I'd appreciate it if somebody could give me a hint!

[Turbo J]

If keeping the button down is indended, you have to invert the pin sense (GPIO_PIN_CNF_SENSE_High in your case). Otherwise the MCU cannot sleep. Basically this lets the MCU sleep until the user releases the button. Oh, and when this happens the pin will need the old sense config applied.

[jiurifei]

Thank you for your suggestion.I have tried this way and it indeed worked.In this situation, pressing or releasing the button both triggered an interruption.The button configuration would be changed in each interrupt handler function.I do not know whether it is applicable, if you have a better way,please let me know.