/**
* @brief Configures and activates the ADC peripheral.
*
* @param[in] adcp pointer to the @p ADCDriver object
*
* @notapi
*/
void adc_lld_start(ADCDriver *adcp) {
/* Handling the default configuration.*/
if (adcp->config == NULL) {
adcp->config = &default_config;
}
/* If in stopped state then enables the ADC and DMA clocks.*/
if (adcp->state == ADC_STOP) {
#if STM32_ADC_USE_ADC1
if (&ADCD1 == adcp) {
bool b;
b = dmaStreamAllocate(adcp->dmastp,
STM32_ADC_ADC12_DMA_IRQ_PRIORITY,
(stm32_dmaisr_t)adc_lld_serve_dma_interrupt,
(void *)adcp);
osalDbgAssert(!b, "stream already allocated");
rccEnableADC12(FALSE);
}
#endif /* STM32_ADC_USE_ADC1 */
#if STM32_ADC_USE_ADC3
if (&ADCD3 == adcp) {
bool b;
b = dmaStreamAllocate(adcp->dmastp,
STM32_ADC_ADC34_DMA_IRQ_PRIORITY,
(stm32_dmaisr_t)adc_lld_serve_dma_interrupt,
(void *)adcp);
osalDbgAssert(!b, "stream already allocated");
rccEnableADC34(FALSE);
}
#endif /* STM32_ADC_USE_ADC2 */
/* Setting DMA peripheral-side pointer.*/
#if STM32_ADC_DUAL_MODE
dmaStreamSetPeripheral(adcp->dmastp, &adcp->adcc->CDR);
#else
dmaStreamSetPeripheral(adcp->dmastp, &adcp->adcm->DR);
#endif
/* Clock source setting.*/
adcp->adcc->CCR = STM32_ADC_ADC12_CLOCK_MODE | ADC_DMA_MDMA;
/* Differential channels setting.*/
#if STM32_ADC_DUAL_MODE
adcp->adcm->DIFSEL = adcp->config->difsel;
adcp->adcs->DIFSEL = adcp->config->difsel;
#else
adcp->adcm->DIFSEL = adcp->config->difsel;
#endif
/* Master ADC calibration.*/
adc_lld_vreg_on(adcp);
adc_lld_calibrate(adcp);
/* Master ADC enabled here in order to reduce conversions latencies.*/
adc_lld_analog_on(adcp);
}
}
/**
* @brief Configures and activates the ADC peripheral.
*
* @param[in] adcp pointer to the @p ADCDriver object
*
* @notapi
*/
void adc_lld_start(ADCDriver *adcp) {
/* Handling the default configuration.*/
if (adcp->config == NULL) {
adcp->config = &default_config;
}
/* If in stopped state then enables the ADC and DMA clocks.*/
if (adcp->state == ADC_STOP) {
#if STM32_ADC_USE_ADC1
if (&ADCD1 == adcp) {
adcp->dmastp = dmaStreamAllocI(STM32_ADC_ADC1_DMA_STREAM,
STM32_ADC_ADC1_DMA_IRQ_PRIORITY,
(stm32_dmaisr_t)adc_lld_serve_dma_interrupt,
(void *)adcp);
osalDbgAssert(adcp->dmastp != NULL, "unable to allocate stream");
clkmask |= (1 << 0);
#if defined(STM32F3XX)
rccEnableADC12(true);
#endif
#if defined(STM32L4XX) || defined(STM32L4XXP)
rccEnableADC123(true);
#endif
#if STM32_DMA_SUPPORTS_DMAMUX
dmaSetRequestSource(adcp->dmastp, STM32_DMAMUX1_ADC1);
#endif
}
#endif /* STM32_ADC_USE_ADC1 */
#if STM32_ADC_USE_ADC2
if (&ADCD2 == adcp) {
adcp->dmastp = dmaStreamAllocI(STM32_ADC_ADC2_DMA_STREAM,
STM32_ADC_ADC2_DMA_IRQ_PRIORITY,
(stm32_dmaisr_t)adc_lld_serve_dma_interrupt,
(void *)adcp);
osalDbgAssert(adcp->dmastp != NULL, "unable to allocate stream");
clkmask |= (1 << 1);
#if defined(STM32F3XX)
rccEnableADC12(true);
#endif
#if defined(STM32L4XX) || defined(STM32L4XXP)
rccEnableADC123(true);
#endif
#if STM32_DMA_SUPPORTS_DMAMUX
dmaSetRequestSource(adcp->dmastp, STM32_DMAMUX1_ADC2);
#endif
}
#endif /* STM32_ADC_USE_ADC2 */
#if STM32_ADC_USE_ADC3
if (&ADCD3 == adcp) {
adcp->dmastp = dmaStreamAllocI(STM32_ADC_ADC3_DMA_STREAM,
STM32_ADC_ADC3_DMA_IRQ_PRIORITY,
(stm32_dmaisr_t)adc_lld_serve_dma_interrupt,
(void *)adcp);
osalDbgAssert(adcp->dmastp != NULL, "unable to allocate stream");
clkmask |= (1 << 2);
#if defined(STM32F3XX)
rccEnableADC34(true);
#endif
#if defined(STM32L4XX) || defined(STM32L4XXP)
rccEnableADC123(true);
#endif
#if STM32_DMA_SUPPORTS_DMAMUX
dmaSetRequestSource(adcp->dmastp, STM32_DMAMUX1_ADC3);
#endif
}
#endif /* STM32_ADC_USE_ADC3 */
#if STM32_ADC_USE_ADC4
if (&ADCD4 == adcp) {
adcp->dmastp = dmaStreamAllocI(STM32_ADC_ADC4_DMA_STREAM,
STM32_ADC_ADC4_DMA_IRQ_PRIORITY,
(stm32_dmaisr_t)adc_lld_serve_dma_interrupt,
(void *)adcp);
osalDbgAssert(adcp->dmastp != NULL, "unable to allocate stream");
clkmask |= (1 << 3);
#if defined(STM32F3XX)
rccEnableADC34(true);
#endif
#if defined(STM32L4XX) || defined(STM32L4XXP)
rccEnableADC123(true);
#endif
#if STM32_DMA_SUPPORTS_DMAMUX
dmaSetRequestSource(adcp->dmastp, STM32_DMAMUX1_ADC4);
#endif
}
#endif /* STM32_ADC_USE_ADC4 */
/* Setting DMA peripheral-side pointer.*/
#if STM32_ADC_DUAL_MODE
dmaStreamSetPeripheral(adcp->dmastp, &adcp->adcc->CDR);
#else
dmaStreamSetPeripheral(adcp->dmastp, &adcp->adcm->DR);
#endif
/* Differential channels setting.*/
#if STM32_ADC_DUAL_MODE
adcp->adcm->DIFSEL = adcp->config->difsel;
adcp->adcs->DIFSEL = adcp->config->difsel;
#else
adcp->adcm->DIFSEL = adcp->config->difsel;
#endif
/* Master ADC calibration.*/
adc_lld_vreg_on(adcp);
adc_lld_calibrate(adcp);
/* Master ADC enabled here in order to reduce conversions latencies.*/
adc_lld_analog_on(adcp);
}
}
