Battery voltage result of nRF5 SDK v16.0.0 and ncs v.2.4.0 are not the same

RE: Battery voltage result of nRF5 SDK v16.0.0 and ncs v.2.4.0 are not the same

Karl Ylvisaker — Tue, 05 Sep 2023 14:26:10 GMT

Hello,

Is this ticket also resolved with the solution from your other ticket, or do you still require some technical support with this?
If so, please update on your most recent issue here.

Best regards,
Karl

RE: Battery voltage result of nRF5 SDK v16.0.0 and ncs v.2.4.0 are not the same

snowuyl — Tue, 05 Sep 2023 05:47:59 GMT

When I change gain of struct adc_channel_cfg from ADC_GAIN_1 to ADC_GAIN_4. ADC value of SAADC increased (range from 364 to 387). But it still too small.

 batteryVoltageEnable(1) e
00> Enabling battery measurement ok
00> ddp->raw=372, _gBattLvlmv=1854
00> mv=1854, percent=0
00> batteryVoltageEnable(0) e
00> Disabling battery measurement ok
00> _basTimerHandler: 137925
00> batteryVoltageEnable(1) e
00> Enabling battery measurement ok
00> ddp->raw=364, _gBattLvlmv=1819
00> mv=1819, percent=0
00> batteryVoltageEnable(0) e
00> Disabling battery measurement ok
00> _basTimerHandler: 197925
00> batteryVoltageEnable(1) e
00> Enabling battery measurement ok
00> ddp->raw=365, _gBattLvlmv=1819
00> mv=1819, percent=0
00> batteryVoltageEnable(0) e
00> Disabling battery measurement ok
00> _basTimerHandler: 257925
00> batteryVoltageEnable(1) e
00> Enabling battery measurement ok
00> ddp->raw=387, _gBattLvlmv=1930
00> mv=1930, percent=0
00> batteryVoltageEnable(0) e
00> Disabling battery measurement ok

*accp = (struct adc_channel_cfg) {
        .gain = ADC_GAIN_4, //ADC_GAIN_1,
        .reference = ADC_REF_INTERNAL,
        .acquisition_time = ADC_ACQ_TIME(ADC_ACQ_TIME_MICROSECONDS, 40),
    };