ADC_ex.c File Reference

Simple extension for ADCs. More...

#include "sarmfsw.h"
#include "ADC_ex.h"

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Data Structures
struct	ADCex_t
	ADCex structure. More...

Macros
#define	Def_VBatFactor   (2.0f)
	2x factor
#define	STM32_VREF_CAL   (VAL_AT(VREF_CAL_ADDR, uint16_t))
	VRef (ADC) calibration address content.
#define	STM32_TS_CAL1   (VAL_AT(TS_CAL1_ADDR, uint16_t))
	Temp sensor ADC raw data acquired at Lower temperature address content.
#define	STM32_TS_CAL2   (VAL_AT(TS_CAL2_ADDR, uint16_t))
	Temp sensor ADC raw data acquired at Higher temperature address content.
#define	ADC_NB   1UL
	Number of ADC peripherals used.
#define	ADC_NB_CHAN   2UL
	Number of ADC channels used (per peripheral).
#define	TOTAL_ADC_CHANS   (ADC_NB * ADC_NB_CHAN)
	Total number of ADC channels.
#define	ADC_SAMP_BUF_SIZE   4UL
#define	ADC_REFRESH_PERIOD   20UL
	ADC conversions results refreshing period (default value).

Typedefs
typedef uint32_t	DMA_sz_t
	Size of DMA buffer cells (1 cell per ADC value).

Functions
uint16_t	ADC_GetRawVal (const eAnalogInput input)
	Get ADC channel raw value.
float	ADC_GetConvertedVal (const eAnalogInput input)
	Get ADC channel converted value.
FctERR	ADC_Start (void)
	Start ADC acquisitions.
FctERR	ADC_Stop (void)
	Stop ADC acquisitions.
void	ADC_handler (void)
	ADC_ex handler.
void	ADC_SetPeriod (const uint32_t period)
	Set ADC Sampling or Conversion period.
void	HAL_ADC_ConvCpltCallback (ADC_HandleTypeDef *hadc)
	Conversion complete callback in non blocking mode.

Variables
const ADC_Cfg	ADCConfig [Adc_MAX]
	ADCConfig external declaration.
ADCex_t	ADC_ex

Detailed Description

Simple extension for ADCs.

Author

SMFSW

Copyright

MIT (c) 2017-2026, SMFSW

ADC_ex is meant to automate ADC conversions using DMA.

• DMA must be configured for ADC peripherals:
  • Peripheral to Memory
  • Circular Mode
  • Increment Memory
  • Data width Word for both peripheral and memory
• ADC configuration (no need to active ADC global interrupt, DMA will handle conversion complete callback):
  • Scan conversion mode across channels enabled
  • Continuous conversion is optional (as DMA continuous request handles the behavior)
  • DMA continuous request when available (if disabled, user has to start conversions manually when needed)
  • Interrupt generated at end of sequence of conversion

    Note

    Define USE_ADC_EX symbol at project level to use ADC_ex functionalities

    Configuration done including ADC_cfg.h file

Macro Definition Documentation

ADC_NB

#define ADC_NB   1UL

Number of ADC peripherals used.

ADC_NB_CHAN

#define ADC_NB_CHAN   2UL

Number of ADC channels used (per peripheral).

ADC_REFRESH_PERIOD

#define ADC_REFRESH_PERIOD   20UL

ADC conversions results refreshing period (default value).

Note

ADC_SAMP_BUFF_SIZE can be defined in adc_cfg.h, globals.h or at project level if higher amount of samples required

ADC_SAMP_BUF_SIZE

#define ADC_SAMP_BUF_SIZE   4UL

Size of the input buffer per analog input

Def_VBatFactor

#define Def_VBatFactor   (2.0f)

2x factor

STM32_TS_CAL1

#define STM32_TS_CAL1   (VAL_AT(TS_CAL1_ADDR, uint16_t))

Temp sensor ADC raw data acquired at Lower temperature address content.

STM32_TS_CAL2

#define STM32_TS_CAL2   (VAL_AT(TS_CAL2_ADDR, uint16_t))

Temp sensor ADC raw data acquired at Higher temperature address content.

STM32_VREF_CAL

#define STM32_VREF_CAL   (VAL_AT(VREF_CAL_ADDR, uint16_t))

VRef (ADC) calibration address content.

TOTAL_ADC_CHANS

#define TOTAL_ADC_CHANS   (ADC_NB * ADC_NB_CHAN)

Total number of ADC channels.

Typedef Documentation

DMA_sz_t

typedef uint32_t DMA_sz_t

Size of DMA buffer cells (1 cell per ADC value).

Function Documentation

ADC_GetConvertedVal()

float ADC_GetConvertedVal

(

const eAnalogInput

input

)

Get ADC channel converted value.

Parameters

[in]

input

- Input index

Returns

Channel converted value

ADC_GetRawVal()

uint16_t ADC_GetRawVal

(

const eAnalogInput

input

)

Get ADC channel raw value.

Parameters

[in]

input

- Input index

Returns

Channel raw value

ADC_handler()

void ADC_handler

(

void

)

ADC_ex handler.

Note

If ADC_CONTINUOUS_SAMPLING is defined and ADC_AUTO_RAW_VAL_CONV is not defined, ADC_handler is useless

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ADC_SetPeriod()

void ADC_SetPeriod

(

const uint32_t

period

)

Set ADC Sampling or Conversion period.

Parameters

[in]

period

- Sampling or Conversion period (in ms)

ADC_Start()

FctERR ADC_Start

(

void

)

Start ADC acquisitions.

Returns

FctERR - Error code

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ADC_Stop()

FctERR ADC_Stop

(

void

)

Stop ADC acquisitions.

Returns

FctERR - Error code

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HAL_ADC_ConvCpltCallback()

void HAL_ADC_ConvCpltCallback

(

ADC_HandleTypeDef *

hadc

)

Conversion complete callback in non blocking mode.

!

Strong Functions

Strong implementation of HAL_ADC_ConvCpltCallback in the library (will get precedence over HAL function)

Warning

If DMA used, same number of channels to convert have to be declared between ADCs for proper handling

Parameters

[in]

hadc

- ADC handle

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Variable Documentation

ADC_ex

ADCex_t ADC_ex

Initial value:

= {  0, {{ 0 }},
 
     0,
 
 
 
 
     { ADC_REFRESH_PERIOD, ADCConfig } }

ADCConfig

const ADC_Cfg ADCConfig[Adc_MAX]

extern

ADCConfig external declaration.