ADC_task.c File Reference

#include "config.h"
#include "ADC_task.h"

Include dependency graph for ADC_task.c:

Go to the source code of this file.

Functions
void	ADC_Init (void)
	ADC_Init routine: Set-up ADC to acquire speed set value Set-up ADC with following: conversion result right ajusted in ADC data register Reference voltage is AVCC with external capacitor at AREF pin ADC0 selected enable ADC ADC clock set to clk/128 Disable ADC0 (PC0) digital input buffer INPUTS/OUTPUTS : ADMUX Out ADCSRA Out DIDR0 Out.
void	ADC_task (void)
	ADC_task manages Current, desired speed and Vbat measurements Schedules all acquisitions. When an acquisition is complete, get the result and start next one.
unsigned int	adc_get_speed (void)
	get_speed Returns desired speed value
unsigned int	adc_get_current (void)
	get_current Returns measured current
unsigned int	adc_get_V_bat (void)
	get_V_bat Returns measured supply voltage
Variables
unsigned int	Speed_set
	ADC conversion result.
unsigned int	current
	Measured current value (Vshunt signal).
unsigned int	V_bat
	Battery supply voltage measurement.

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Function Documentation

void ADC_Init

(

void

)

ADC_Init routine: Set-up ADC to acquire speed set value Set-up ADC with following:

• conversion result right ajusted in ADC data register
• Reference voltage is AVCC with external capacitor at AREF pin
• ADC0 selected
• enable ADC
• ADC clock set to clk/128
• Disable ADC0 (PC0) digital input buffer INPUTS/OUTPUTS :
• ADMUX Out
• ADCSRA Out
• DIDR0 Out.

Definition at line 65 of file ADC_task.c.

Referenced by main().

{
  /* init ADC */
  ADMUX |= (1 << REFS0);     // conversion result right ajusted in ADC, AVCC with external capacitor at AREF pin, ADC0 selected
  ADCSRA |= (1<<ADEN) | (1<<ADPS2) | (1<<ADPS1) | (1<<ADPS0); // enable ADC, division factor : clk/128
  DIDR0 |= (1<<ADC0D);      // Disable ADC0 digital input buffer
}

void ADC_task

(

void

)

ADC_task manages Current, desired speed and Vbat measurements Schedules all acquisitions. When an acquisition is complete, get the result and start next one.

Definition at line 78 of file ADC_task.c.

References ADC0, ADC6, ADC7, ADC_clear_end_conv_flag, ADC_data_reg, ADC_end_conv, ADC_INIT_TASK, ADC_start_conv, ADC_WAIT_CURRENT_MEAS, ADC_WAIT_SPEED_SET_MEAS, ADC_WAIT_VBAT_MEAS, current, Set_ADC_Channel, Speed_set, and V_bat.

Referenced by main().

{
  static ADC_state_t ADC_state = ADC_INIT_TASK;  // ADC state machine init
  
  switch(ADC_state)
  {
  case ADC_INIT_TASK:                         // Start current measurement
    Set_ADC_Channel(ADC0);                    // Select ADC0, Vshunt signal
    ADC_start_conv();                         // Start conversion
    ADC_state = ADC_WAIT_CURRENT_MEAS;
    break;
    
  //----------------------------------------------------------------------------
  case ADC_WAIT_CURRENT_MEAS:                 // Wait current measurement aquisition
    if(ADC_end_conv())                        // When ADC conversion is completed
    {
      ADC_clear_end_conv_flag();              // Clear end conv interrupt flag
      current = ADC_data_reg();               // Get Current in ADC data register  
      
      Set_ADC_Channel(ADC7);                  // Select ADC7, Potentiometer speed signal
      ADC_start_conv();                       // Start conversion
      ADC_state = ADC_WAIT_SPEED_SET_MEAS;
    }
    break;
  //----------------------------------------------------------------------------
    
  case ADC_WAIT_SPEED_SET_MEAS:               // Wait desired speed measurement aquisition
    if(ADC_end_conv())                        // When ADC conversion is completed
    {
      ADC_clear_end_conv_flag();              // Clear end conv interrupt flag
      Speed_set = ADC_data_reg();             // Get Speed in ADC data register  
      
      Set_ADC_Channel(ADC6);                  // Select ADC6, Vbat measure signal
      ADC_start_conv();                       // Start conversion
      ADC_state = ADC_WAIT_VBAT_MEAS;
    }
    break;
  //----------------------------------------------------------------------------

  case ADC_WAIT_VBAT_MEAS:
    if(ADC_end_conv())                        // When ADC conversion is completed
    {
      ADC_clear_end_conv_flag();              // Clear end conv interrupt flag
      V_bat = ADC_data_reg();                 // Get Speed in ADC data register  
      
      Set_ADC_Channel(ADC0);                  // Select ADC0, Vshunt (current) signal
      ADC_start_conv();                       // Start conversion
      ADC_state = ADC_WAIT_CURRENT_MEAS;
    }
    break;
  //----------------------------------------------------------------------------
  default:
    ADC_state = ADC_INIT_TASK;
    break;
  //----------------------------------------------------------------------------
  }
}

unsigned int adc_get_speed

(

void

)

get_speed Returns desired speed value

Definition at line 138 of file ADC_task.c.

References Speed_set.

Referenced by main().

{
  return Speed_set;
}

unsigned int adc_get_current

(

void

)

get_current Returns measured current

Definition at line 145 of file ADC_task.c.

References current.

{
  return current;
}

unsigned int adc_get_V_bat

(

void

)

get_V_bat Returns measured supply voltage

Definition at line 152 of file ADC_task.c.

References V_bat.

{
  return V_bat;
}

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Variable Documentation

unsigned int Speed_set

ADC conversion result.

Definition at line 45 of file ADC_task.c.

Referenced by adc_get_speed(), and ADC_task().

unsigned int current

Measured current value (Vshunt signal).

Definition at line 46 of file ADC_task.c.

Referenced by adc_get_current(), and ADC_task().

unsigned int V_bat

Battery supply voltage measurement.

Definition at line 47 of file ADC_task.c.

Referenced by adc_get_V_bat(), and ADC_task().

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