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Diffstat (limited to '2.3-1/src/c/hardware/avr/adc/u8AVRReadADCs.c')
-rw-r--r-- | 2.3-1/src/c/hardware/avr/adc/u8AVRReadADCs.c | 82 |
1 files changed, 82 insertions, 0 deletions
diff --git a/2.3-1/src/c/hardware/avr/adc/u8AVRReadADCs.c b/2.3-1/src/c/hardware/avr/adc/u8AVRReadADCs.c new file mode 100644 index 00000000..302f8c82 --- /dev/null +++ b/2.3-1/src/c/hardware/avr/adc/u8AVRReadADCs.c @@ -0,0 +1,82 @@ +// Copyright (C) 2017 - IIT Bombay - FOSSEE +// +// This file must be used under the terms of the CeCILL. +// This source file is licensed as described in the file COPYING, which +// you should have received as part of this distribution. The terms +// are also available at +// http://www.cecill.info/licences/Licence_CeCILL_V2-en.txt +// Organization: FOSSEE, IIT Bombay +// Email: toolbox@scilab.in + +// Function to get voltage on analog pin on AVR +// +// Calling Sequence +// u8AVRReadADCs(channel) +// +// Parameters +// channel : Select which channel is to be read. Values from 0-7 select one +// of the pins ADC0-ADC7. For other possible channel values refer +// datasheet +// Returns-> +// result : Digital value for the voltage present on channel selected +// +// Description +// This function returns digital value for present on adc pins. 'channel' +// selects which of the ADC0-ADC7 is to be used for reading analog value. +// Apart from reading just ADC0-ADC7 other it can also read differential +// voltages between some pins. For channel values for those options, please +// refer datasheet. +// +// Examples +// adc_result = u8AVRReadADC(0) //Read ADC0 +// +// Authors +// Siddhesh Wani +// Ashish Kamble + + +#include "AVRPeripheralADC.h" + +uint8 u8AVRReadADCs(uint8 channel) +{ + +uint8 i; + + ADCH=0x00; + + i=channel&0x07; + ADMUX=i|0x60; //i|0x40 for 10 bits + ADCSRA|=1<<ADSC; + + while(ADCSRA & (1<<ADSC)); // wait for conv. to complete + uint8 temp=ADCH; //unsigned int temp=ADC; for 10 bits + + return temp; + +} + + + + + + + + + + +/*Set ADC conversion channel*/ +// ADMUX |= (channel & 0x1F); + + /*Start ADC conversion. Set 'ADSC' bit*/ +// ADCSRA |= (1<<6); + + /*Wait for conversion to complete. Check 'ADIF' bit*/ +// while(!(ADCSRA & (1<<4))); + + /*Clear ADIF flag*/ +// ADCSRA |= (1<<4); + + /*ADC conversion result is stored in ADCH/L registers*/ +// return (ADC); + + |