ADC DMA management

Functions
__STATIC_INLINE uint32_t	LL_ADC_DMA_GetRegAddr (ADC_TypeDef *ADCx, uint32_t Register)
	Function to help to configure DMA transfer from ADC: retrieve the ADC register address from ADC instance and a list of ADC registers intended to be used (most commonly) with DMA transfer. More...

Detailed Description

Function Documentation

LL_ADC_DMA_GetRegAddr()

__STATIC_INLINE uint32_t LL_ADC_DMA_GetRegAddr	(	ADC_TypeDef *	ADCx,
		uint32_t	Register
	)

Function to help to configure DMA transfer from ADC: retrieve the ADC register address from ADC instance and a list of ADC registers intended to be used (most commonly) with DMA transfer.

Note

These ADC registers are data registers: when ADC conversion data is available in ADC data registers, ADC generates a DMA transfer request.

This macro is intended to be used with LL DMA driver, refer to function "LL_DMA_ConfigAddresses()". Example: LL_DMA_ConfigAddresses(DMA1, LL_DMA_CHANNEL_1, LL_ADC_DMA_GetRegAddr(ADC1, LL_ADC_DMA_REG_REGULAR_DATA), (uint32_t)&< array or variable >, LL_DMA_DIRECTION_PERIPH_TO_MEMORY);

For devices with several ADC: in multimode, some devices use a different data register outside of ADC instance scope (common data register). This macro manages this register difference, only ADC instance has to be set as parameter. DR RDATA LL_ADC_DMA_GetRegAddr
CDR RDATA_MST LL_ADC_DMA_GetRegAddr
CDR RDATA_SLV LL_ADC_DMA_GetRegAddr

Parameters

ADCx	ADC instance
Register	This parameter can be one of the following values: LL_ADC_DMA_REG_REGULAR_DATA LL_ADC_DMA_REG_REGULAR_DATA_MULTI (1) (1) Available on devices with several ADC instances.

Return values

ADC	register address

Definition at line 2370 of file stm32l4xx_ll_adc.h.

{
  register uint32_t data_reg_addr;

  if (Register == LL_ADC_DMA_REG_REGULAR_DATA)
  {
    /* Retrieve address of register DR */
    data_reg_addr = (uint32_t) &(ADCx->DR);
  }
  else /* (Register == LL_ADC_DMA_REG_REGULAR_DATA_MULTI) */
  {
    /* Retrieve address of register CDR */
    data_reg_addr = (uint32_t) &((__LL_ADC_COMMON_INSTANCE(ADCx))->CDR);
  }

  return data_reg_addr;
}