ST STM32L0x3 - Page 992

Code examples RM0367
992/1043 RM0367 Rev 7
/* (6) Enable interrupts on EOC, EOSEQ and Analog Watchdog */
/* (7) Wake-up the VREFINT (only for VBAT, Temp sensor and VRefInt) */
//ADC1->CFGR2 &= ~ADC_CFGR2_CKMODE; /* (1) */
ADC1->CFGR1 |= ADC_CFGR1_CONT \
| (17<<26) | ADC_CFGR1_AWDEN | ADC_CFGR1_AWDSGL; /* (2) */
ADC1->TR = (vrefint_high << 16) + vrefint_low; /* (3 */
ADC1->CHSELR = ADC_CHSELR_CHSEL4 | ADC_CHSELR_CHSEL9
| ADC_CHSELR_CHSEL17; /* (4) */
ADC1->SMPR |= ADC_SMPR_SMP_0 | ADC_SMPR_SMP_1 | ADC_SMPR_SMP_2; /* (5) */
ADC1->IER = ADC_IER_EOCIE | ADC_IER_EOSEQIE | ADC_IER_AWDIE; /* (6) */
ADC->CCR |= ADC_CCR_VREFEN; /* (7) */
A.8.15 Oversampling code example
/* (1) Select HSI16 by writing 00 in CKMODE (reset value)
Enable oversampling with ratio 16 and shifted by 1,
without trigger */
ADC1->CFGR2 = (ADC1->CFGR2 & (~ADC_CFGR2_CKMODE))
| (ADC_CFGR2_OVSE | ADC_CFGR2_OVSR_1 | ADC_CFGR2_OVSR_0
| ADC_CFGR2_OVSS_0); /* (1) */
A.8.16 Temperature configuration code example
/* (1) Select HSI16 by writing 00 in CKMODE (reset value) */
/* (2) Select continuous mode */
/* (3) Select CHSEL18 for temperature sensor */
/* (4) Select a sampling mode of 111 i.e. 239.5 ADC clk to be greater
than 2.2us */
/* (5) Wake-up the Temperature sensor (only for Temp sensor and
VRefInt) */
//ADC1->CFGR2 &= ~ADC_CFGR2_CKMODE; /* (1) */
ADC1->CFGR1 |= ADC_CFGR1_CONT; /* (2) */
ADC1->CHSELR = ADC_CHSELR_CHSEL18; /* (3) */
ADC1->SMPR |= ADC_SMPR_SMP; /* (4) */
ADC->CCR |= ADC_CCR_TSEN; /* (5) */
A.8.17 Temperature computation code example
/* Temperature sensor calibration value address */
#define TEMP130_CAL_ADDR ((uint16_t*) ((uint32_t) 0x1FF8007E))
#define TEMP30_CAL_ADDR ((uint16_t*) ((uint32_t) 0x1FF8007A))
#define VDD_CALIB ((uint16_t) (300))
#define VDD_APPLI ((uint16_t) (330))
int32_t ComputeTemperature(uint32_t measure)
{
int32_t temperature;
temperature = ((measure * VDD_APPLI / VDD_CALIB)