adc_drv.h

这是,单片机方面的源码,大家下哈,这晨只是给大家做个参考

//! @file adc_drv.h,v
//!
//! Copyright (c) 2004 Atmel.
//!
//! Please read file license.txt for copyright notice.
//!
//! @brief This file contains the low level macros and definition for the ADC
//!
//! @version 1.5.2.7 at90pwm3-lib-mcu-0_0_2
//!
//! @todo
//! @bug

#ifndef ADC_DRV_H
#define ADC_DRV_H

//_____ I N C L U D E S ____________________________________________________


//! @defgroup ADC_module ADC Module 
//! ADC Module
//! @{
//_____ M A C R O S ________________________________________________________

   //! @defgroup ADC_macros ADC Macros 
   //! Low level macros that permit the use of the ADC of the product.
   //! @{

      //! @defgroup Turn_on_adc Turn on the ADC
      //! Turn on the ADC
      //! @{
#define Enable_adc()                         (ADCSRA |= (1<<ADEN))  
      //! @}

      //! @defgroup ADC_alignement_configuration ADC Alignement Configuration
      //! Configure the Result alignement
      //! @{
#define Right_adjust_adc_result()            (ADMUX  &= ~(1<<ADLAR)) 
#define Left_adjust_adc_result()             (ADMUX  |=  (1<<ADLAR))
      //! @}

      //! @defgroup ADC_high_speed_mode_configuration ADC High Speed Mode Configuration
      //! Set the high spped mode in case ADC frequency is higher than 200KHz
      //! @{
#define Enable_adc_high_speed_mode()         (ADCSRB |=  (1<<ADHSM)) 
#define Disable_adc_high_speed_mode()        (ADCSRB &= ~(1<<ADHSM))
      //! @}


      //! @defgroup ADC_vref_configuration ADC Vref Configuration
      //! Configure the Vref
      //! @{
#define Enable_internal_vref()               (ADMUX  |=  ((1<<REFS1)|(1<<REFS0)) )
#define Enable_external_vref()               (ADMUX  &= ~((1<<REFS1)|(1<<REFS0)) )
#define Enable_vcc_vref()                    (ADMUX  &= ~(1<<REFS1),          \
                                              ADMUX  |=  (1<<REFS0) ) 
      //! @}

      //! @defgroup ADC_it_configuration ADC IT Configuration
      //! Configure the ADC IT
      //! @{
#define Enable_all_it()                      (SREG   |=  (0x80) ) 
#define Disable_all_it()                     (SREG   &= ~(0x80) )
#define Enable_adc_it()                      (ADCSRA |=  (1<<ADIE) )
#define Disable_adc_it()                     (ADCSRA &= ~(1<<ADIE) )
#define Clear_adc_flag()                     (ADCSRA &=  (1<<ADIF) ) 
      //! @}

      //! @defgroup ADC_prescaler_configuration ADC Prescaler Configuration
      //! Configure the ADC prescaler
      //! @{
#define Set_prescaler(prescaler)             (ADCSRA &= ~((1<<ADPS2)|(1<<ADPS1)|(1<<ADPS0)),\
                                              ADCSRA |=  (prescaler) )
      //! @}

      //! @defgroup ADC_channel_selection ADC Channel Selection
      //! Select the ADC channel to be converted
      //! @{
#define Clear_adc_mux()                      (ADMUX  &= ~((1<<MUX3)|(1<<MUX2)|(1<<MUX1)|(1<<MUX0)) )  
#define Select_adc_channel(channel)          (Clear_adc_mux(), ADMUX |= (channel) )
      //! @}

      //! @defgroup ADC_start_conversion ADC Start Conversion
      //! Start the Analog to Digital Conversion
      //! @{

         //! @defgroup ADC_start_normal_conversion ADC Start Normal Conversion
         //! Start the conversion in normal mode
         //! @{
#define Start_conv()                          (ADCSRA |= (1<<ADSC) )
#define Start_conv_channel(channel)           (Select_adc_channel(channel), Start_conv() ) 
#define Start_amplified_conv()                (ADCSRB |= (1<<ADASCR) )
#define Stop_amplified_conv()                 (ADCSRB &= ~(1<<ADASCR) )
#define Start_amplified_conv_channel(channel) (Select_adc_channel(channel), Start_amplified_conv() )
         //! @}

         //! @defgroup ADC_start_idle_conversion ADC Start Idle Conversion
         //! Start the Analog to Digital Conversion in noise reduction mode
         //! @{
#define Start_conv_idle()                    (SMCR   |=  (1<<SM0)|(1<<SE) )  
#define Start_conv_idle_channel(channel)     (Select_adc_channel(channel), Start_conv_idle() ) 
#define Clear_sleep_mode()                   (SMCR   &= ~(1<<SM0)|(1<<SE) )
         //! @}

      //! @}

      //! @defgroup ADC_get_x_bits_result ADC Get x Bits Result
      //! ADC Get x Bits Result
      //! @{
#define Adc_get_8_bits_result()               ((U8)(ADCH))
#define Adc_get_10_bits_result()              ((U16)(ADCL+((U16)(ADCH<<8))))
      //! @}


      //! @defgroup Turn_off_adc Turn Off the ADC
      //! Turn Off the ADC
      //! @{
#define Disable_adc()                        (ADCSRA &= ~(1<<ADEN))
      //! @}

   //! @}

//_____ D E F I N I T I O N S ______________________________________________

//_____ F U N C T I O N S __________________________________________________
   //! @defgroup ADC_low_level_functions ADC Low Level Fucntions
   //! ADC Low Level Functions
   //! @{

//! Configures the ADC accordingly to the ADC Define Configuration values.
//! Take care that you have to select the ports which will be converted as
//! analog inputs thanks to the DIDR0 and DIDR1 registers.
//!
void init_adc(void);
   //! @}

//! @}

#endif  // ADC_DRV_H