nrf51822 tempeture based on interrupt

RE: nrf51822 tempeture based on interrupt

ALi — Mon, 15 Aug 2016 19:37:24 GMT

this my adc code: I copied. and start task in app timer and it works:

//ADC initialization
static void adc_init(void)
{	
/* Enable interrupt on ADC sample ready event*/		
NRF_ADC->INTENSET = ADC_INTENSET_END_Msk;   
sd_nvic_SetPriority(ADC_IRQn, NRF_APP_PRIORITY_LOW);  
sd_nvic_EnableIRQ(ADC_IRQn);

NRF_ADC->CONFIG	= (ADC_CONFIG_EXTREFSEL_None << ADC_CONFIG_EXTREFSEL_Pos) /* Bits 17..16 : ADC external reference pin selection. */
								| (ADC_CONFIG_PSEL_AnalogInput2 << ADC_CONFIG_PSEL_Pos)					/*!< Use analog input 2 as analog input. */
								| (ADC_CONFIG_REFSEL_VBG << ADC_CONFIG_REFSEL_Pos)							/*!< Use internal 1.2V bandgap voltage as reference for conversion. */
									| (ADC_CONFIG_INPSEL_AnalogInputOneThirdPrescaling << ADC_CONFIG_INPSEL_Pos) /*!< Analog input specified by PSEL with no prescaling used as input for the conversion. */
									| (ADC_CONFIG_RES_10bit << ADC_CONFIG_RES_Pos);									/*!< 8bit ADC resolution. */ 
	
	/* Enable ADC*/
	NRF_ADC->ENABLE = ADC_ENABLE_ENABLE_Enabled;
}

/* Interrupt handler for ADC data ready event */
void ADC_IRQHandler(void)
{
	uint16_t adc_result;
	
	/* Clear dataready event */
  NRF_ADC->

EVENTS_END = 0;

/* Write ADC result both to the UART and over BLE */ adc_result = NRF_ADC->RESULT; printf("ADC p01: %d / 1023\r\n",adc_result);

//Use the STOP task to save current. Workaround for PAN_028 rev1.5 anomaly 1.
  NRF_ADC->TASKS_STOP = 1;
	
	//Release the external crystal
	//sd_clock_hfclk_release();
    }

RE: nrf51822 tempeture based on interrupt

Susheel Nuguru — Mon, 15 Aug 2016 08:30:45 GMT

ADC too have start task. Difficult to say how you configured ADC without looking at your code.

RE: nrf51822 tempeture based on interrupt

ALi — Mon, 15 Aug 2016 08:21:45 GMT

no, it didn't CALL , but why my ADC interrupt call. it has same form like this.

RE: nrf51822 tempeture based on interrupt

Susheel Nuguru — Mon, 15 Aug 2016 08:05:16 GMT

then make sure that it gets called after you power the TEMP module. there is nothing else wrong that i can see

RE: nrf51822 tempeture based on interrupt

ALi — Mon, 15 Aug 2016 08:00:17 GMT

I do that in my app timer interrupt

RE: nrf51822 tempeture based on interrupt

Susheel Nuguru — Mon, 15 Aug 2016 07:00:06 GMT

you for got to do

NRF_TEMP->TASKS_START = 1;

after you power up TEMP module