ATMEL: adc_drv.c Source File

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# adc_drv.c

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    00001 /*This file is prepared for Doxygen automatic documentation generation.*/
    00013
    00014 /* Copyright (c) 2009 Atmel Corporation. All rights reserved.
    00015  *
    00016  * Redistribution and use in source and binary forms, with or without
    00017  * modification, are permitted provided that the following conditions are met:
    00018  *
    00019  * 1. Redistributions of source code must retain the above copyright notice,
    00020  * this list of conditions and the following disclaimer.
    00021  *
    00022  * 2. Redistributions in binary form must reproduce the above copyright notice,
    00023  * this list of conditions and the following disclaimer in the documentation
    00024  * and/or other materials provided with the distribution.
    00025  *
    00026  * 3. The name of Atmel may not be used to endorse or promote products derived
    00027  * from this software without specific prior written permission.
    00028  *
    00029  * THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR IMPLIED
    00030  * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
    00031  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE EXPRESSLY AND
    00032  * SPECIFICALLY DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR ANY DIRECT,
    00033  * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
    00034  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
    00035  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
    00036  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
    00037  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
    00038  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
    00039  */
    00040
    00041 //_____  I N C L U D E S ___________________________________________________
    00042
    00043 #include "config.h"
    00044
    00045 #ifdef USE_ADC
    00046 #include "adc_drv.h"
    00047
    00048 //_____ M A C R O S ________________________________________________________
    00049
    00050
    00051 //_____ P R I V A T E    D E C L A R A T I O N _____________________________
    00052
    00053
    00054 //_____ D E F I N I T I O N ________________________________________________
    00055
    00056
    00057 //_____ D E C L A R A T I O N ______________________________________________
    00062 void init_adc(void)
    00063 {
    00064     Enable_adc();
    00065 #   if (ADC_RIGHT_ADJUST_RESULT == 1)
    00066        Right_adjust_adc_result();
    00067 #   elif (ADC_RIGHT_ADJUST_RESULT == 0)
    00068        Left_adjust_adc_result();
    00069 #   else
    00070 #      error (ADC_RIGHT_ADJUST_RESULT should be 0 or 1... See config.h file)
    00071 #   endif
    00072
    00073 #   if (ADC_HIGH_SPEED_MODE == 1)
    00074        Enable_adc_high_speed_mode();
    00075 #   elif (ADC_HIGH_SPEED_MODE == 0)
    00076        Disable_adc_high_speed_mode();
    00077 #   else
    00078 #      error (ADC_HIGH_SPEED_MODE should be 0 or 1... See config.h file)
    00079 #   endif
    00080
    00081 #   if (ADC_INTERNAL_VREF == 2)
    00082        Enable_vcc_vref();
    00083 #   elif (ADC_INTERNAL_VREF == 1)
    00084        Enable_internal_vref();
    00085 #   elif (ADC_INTERNAL_VREF == 0)
    00086        Enable_vcc_vref();
    00087 #   else
    00088 #      error (ADC_INTERNAL_VREF should be 0, 1 or 2... See config.h file)
    00089 #   endif
    00090
    00091 #   if (ADC_IT == 1)
    00092        Enable_all_it();
    00093        Enable_adc_it();
    00094 #   elif (ADC_IT == 0)
    00095        Disable_adc_it();
    00096 #   else
    00097 #      error (ADC_IT should be 0 or 1... See config.h file)
    00098 #   endif
    00099
    00100 #   if (ADC_PRESCALER == 128)
    00101        Set_prescaler(7);
    00102 #   elif (ADC_PRESCALER == 64)
    00103        Set_prescaler(6);
    00104 #   elif (ADC_PRESCALER == 32)
    00105        Set_prescaler(5);
    00106 #   elif (ADC_PRESCALER == 16)
    00107        Set_prescaler(4);
    00108 #   elif (ADC_PRESCALER ==  8)
    00109        Set_prescaler( 3);
    00110 #   elif (ADC_PRESCALER ==  4)
    00111        Set_prescaler( 2);
    00112 #   elif (ADC_PRESCALER ==  2)
    00113        Set_prescaler( 1);
    00114 #   else
    00115 #      error (ADC_PRESCALER should be 2, 4, 8, 16, 32, 64 or 128... See config.h file)
    00116 #   endif
    00117 }
    00118
    00119 #endif // USE_ADC