ST STM32L0x3

Code examples RM0367
986/1043 RM0367 Rev 7
/* (5) Configure the Trigger Selection bits of the Interrupt line
on rising edge */
/* (6) Configure the Trigger Selection bits of the Interrupt line
on falling edge */
RCC->IOPENR |= RCC_IOPENR_GPIOAEN; /* (1) */
GPIOA->MODER = (GPIOA->MODER & ~(GPIO_MODER_MODE0)); /* (2) */
//SYSCFG->EXTICR[0] &= (uint16_t)~SYSCFG_EXTICR1_EXTI0_PA; /* (3) */
EXTI->IMR |= 0x0001; /* (4) */
EXTI->RTSR |= 0x0001; /* (5) */
//EXTI->FTSR |= 0x0001; /* (6) */
/* Configure NVIC for Extended Interrupt */
/* (7) Enable Interrupt on EXTI0_1 */
/* (8) Set priority for EXTI0_1 */
NVIC_EnableIRQ(EXTI0_1_IRQn); /* (7) */
NVIC_SetPriority(EXTI0_1_IRQn,0); /* (8) */
A.8 ADC
A.8.1 Calibration code example
/* (1) Ensure that ADEN = 0 */
/* (2) Clear ADEN */
/* (3) Set ADCAL=1 */
/* (4) Wait until EOCAL=1 */
/* (5) Clear EOCAL */
if ((ADC1->CR & ADC_CR_ADEN) != 0) /* (1) */
{
ADC1->CR |= ADC_CR_ADDIS; /* (2) */
}
ADC1->CR |= ADC_CR_ADCAL; /* (3) */
while ((ADC1->ISR & ADC_ISR_EOCAL) == 0) /* (4) */
{
/* For robust implementation, add here time-out management */
}
ADC1->ISR |= ADC_ISR_EOCAL; /* (5) */
A.8.2 ADC enable sequence code example
/* (1) Clear the ADRDY bit */
/* (2) Enable the ADC */
/* (3) Wait until ADC ready */
ADC1->ISR |= ADC_ISR_ADRDY; /* (1) */
ADC1->CR |= ADC_CR_ADEN; /* (2) */
if ((ADC1->CFGR1 & ADC_CFGR1_AUTOFF) == 0)