nrf52832 does not work well at power on

RE: nrf52832 does not work well at power on

wlgrd — Thu, 27 Apr 2017 08:50:18 GMT

Are you using any external uart connection or similar? This can actually cause your chip to be powered just enough to not be reset, even though you turn it off. Opening the debug settings in Keil actually causes a reset, so I am guessing it is not reset properly on power down.

RE: nrf52832 does not work well at power on

Petter Myhre — Thu, 27 Apr 2017 07:21:44 GMT

I just tested your code on a PCA10040. It seems to be working fine, its behavior is the same every time, the LED blinks two times, after power off and power on.

RE: nrf52832 does not work well at power on

Petter Myhre — Thu, 27 Apr 2017 07:19:01 GMT

What does your PCB have to do with this? Are you testing this on your PCB or a PCA10040?

RE: nrf52832 does not work well at power on

bijian — Thu, 27 Apr 2017 06:49:36 GMT

the pin DCC of nrf52832 in my PCB is disconnected, but I use "sd_power_dcdc_mode_set(NRF_POWER_DCDC_ENABLE);" ,which will cause some problems.But the PCA10040 DK's DCC pin is connected to to the right components,it still can not work well,so there are some other problems in my code. I'm finding.

RE: nrf52832 does not work well at power on

bijian — Thu, 27 Apr 2017 05:43:37 GMT

first download my code to PCA10040 DK, all work fine. There is a switch in the DK, when I switch off the board and switch on again,it goes wrong.

int main(void)

{

uint8_t num = 0;

nrf_gpio_cfg_output(18);

while ( num < 2 )

{

num++;

nrf_gpio_pin_write(18,0);

nrf_delay_ms(500);

nrf_gpio_pin_write(18,1);

nrf_delay_ms(500);

}

// while(1);

/***************************
... //other code, first comment then to test other code.

***************************/

}

what's the difference if there is a "while (1);" or not ? what I see is that led1 will blinks two times or blinks all the time? Why?

RE: nrf52832 does not work well at power on

Petter Myhre — Wed, 26 Apr 2017 07:34:28 GMT

Could you edit your question and include the actual code you are referencing? What do you mean by when the board power off and then power on again?