DAC helper macro

Defines
#define	__LL_DAC_CHANNEL_TO_DECIMAL_NB(__CHANNEL__)   ((__CHANNEL__) & DAC_SWTR_CHX_MASK)
	Helper macro to get DAC channel number in decimal format from literals LL_DAC_CHANNEL_x.
#define	__LL_DAC_DECIMAL_NB_TO_CHANNEL(__DECIMAL_NB__)
	Helper macro to get DAC channel in literal format LL_DAC_CHANNEL_x from number in decimal format.
#define	__LL_DAC_DIGITAL_SCALE(__DAC_RESOLUTION__)   ((0x00000FFFU) >> ((__DAC_RESOLUTION__) << 1U))
	Helper macro to define the DAC conversion data full-scale digital value corresponding to the selected DAC resolution.
#define	__LL_DAC_CALC_VOLTAGE_TO_DATA(__VREFANALOG_VOLTAGE__, __DAC_VOLTAGE__, __DAC_RESOLUTION__)
	Helper macro to calculate the DAC conversion data (unit: digital value) corresponding to a voltage (unit: mVolt).

---

Define Documentation

#define __LL_DAC_CALC_VOLTAGE_TO_DATA	(		__VREFANALOG_VOLTAGE__,
			__DAC_VOLTAGE__,
			__DAC_RESOLUTION__
	)

Value:

((__DAC_VOLTAGE__) * __LL_DAC_DIGITAL_SCALE(__DAC_RESOLUTION__)              \
   / (__VREFANALOG_VOLTAGE__)                                                  \
  )

Helper macro to calculate the DAC conversion data (unit: digital value) corresponding to a voltage (unit: mVolt).

Note:

This helper macro is intended to provide input data in voltage rather than digital value, to be used with LL DAC functions such as LL_DAC_ConvertData12RightAligned().

Analog reference voltage (Vref+) must be either known from user board environment or can be calculated using ADC measurement and ADC helper macro __LL_ADC_CALC_VREFANALOG_VOLTAGE().

Parameters:

__VREFANALOG_VOLTAGE__	Analog reference voltage (unit mV)
__DAC_VOLTAGE__	Voltage to be generated by DAC channel (unit: mVolt).
__DAC_RESOLUTION__	This parameter can be one of the following values: LL_DAC_RESOLUTION_12B LL_DAC_RESOLUTION_8B

Return values:

DAC	conversion data (unit: digital value)

Definition at line 502 of file stm32f4xx_ll_dac.h.

#define __LL_DAC_CHANNEL_TO_DECIMAL_NB

(

__CHANNEL__

)

((__CHANNEL__) & DAC_SWTR_CHX_MASK)

Helper macro to get DAC channel number in decimal format from literals LL_DAC_CHANNEL_x.

Example: __LL_DAC_CHANNEL_TO_DECIMAL_NB(LL_DAC_CHANNEL_1) will return decimal number "1".

Note:

The input can be a value from functions where a channel number is returned.

Parameters:

__CHANNEL__

This parameter can be one of the following values: LL_DAC_CHANNEL_1 LL_DAC_CHANNEL_2 (1) (1) On this STM32 serie, parameter not available on all devices. Refer to device datasheet for channels availability.

Return values:

1...2

(value "2" depending on DAC channel 2 availability)

Definition at line 421 of file stm32f4xx_ll_dac.h.

#define __LL_DAC_DECIMAL_NB_TO_CHANNEL

(

__DECIMAL_NB__

)

Value:

(((__DECIMAL_NB__) == 1U)                                                     \
    ? (                                                                        \
       LL_DAC_CHANNEL_1                                                        \
      )                                                                        \
      :                                                                        \
      (((__DECIMAL_NB__) == 2U)                                                 \
        ? (                                                                    \
           LL_DAC_CHANNEL_2                                                    \
          )                                                                    \
          :                                                                    \
          (                                                                    \
           0                                                                   \
          )                                                                    \
      )                                                                        \
  )

Helper macro to get DAC channel in literal format LL_DAC_CHANNEL_x from number in decimal format.

Example: __LL_DAC_DECIMAL_NB_TO_CHANNEL(1) will return a data equivalent to "LL_DAC_CHANNEL_1".

Note:

If the input parameter does not correspond to a DAC channel, this macro returns value '0'.

Parameters:

__DECIMAL_NB__

1...2 (value "2" depending on DAC channel 2 availability)

Return values:

Returned

value can be one of the following values: LL_DAC_CHANNEL_1 LL_DAC_CHANNEL_2 (1) (1) On this STM32 serie, parameter not available on all devices. Refer to device datasheet for channels availability.

Definition at line 441 of file stm32f4xx_ll_dac.h.

#define __LL_DAC_DIGITAL_SCALE

(

__DAC_RESOLUTION__

)

((0x00000FFFU) >> ((__DAC_RESOLUTION__) << 1U))

Helper macro to define the DAC conversion data full-scale digital value corresponding to the selected DAC resolution.

Note:

DAC conversion data full-scale corresponds to voltage range determined by analog voltage references Vref+ and Vref- (refer to reference manual).

Parameters:

__DAC_RESOLUTION__

This parameter can be one of the following values: LL_DAC_RESOLUTION_12B LL_DAC_RESOLUTION_8B

Return values:

ADC	conversion data equivalent voltage value (unit: mVolt)

Definition at line 481 of file stm32f4xx_ll_dac.h.