adc.c File Reference

Routines for handling the ADC. More...

Include dependency graph for adc.c:

Functions
void	InitADC (void)
	Initializes the ADC. More...
	ISR (ADC_vect)
	ADC Conversion Complete Interrupt. More...

Variables
volatile ADCData_t	ADCData
	ADC-Values for the last measurement. More...
volatile ADCData_t	ADCDataAvg
	Averaged ADC-Values. More...
volatile ADCData_t	ADCDataMax
	Maximum ADC-Values during last average Period. More...
volatile ADCData_t	ADCDataMaxTmp
	Maximum ADC-Values in the current Period. More...
volatile ADCData_t	ADCDataMin
	Minimum ADC-Values during last average Period. More...
volatile ADCData_t	ADCDataMinTmp
	Minimum ADC-Values in the current Period. More...
volatile uint8_t	adcFlags
static uint8_t	channel
volatile uint16_t	channelMismatchCnt

Detailed Description

Routines for handling the ADC.

Copyright

Copyright (C) 2009 Robert Loos http://www.loosweb.de

This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License along with this program. If not, see http://www.gnu.org/licenses/.

Function Documentation

InitADC()

void InitADC

(

void

)

Initializes the ADC.

The ADC is set to free running mode at 115.2kHz clock. This gives one result every 113us or one complete set every 564us.

References channel, and muxChannel.

ISR()

ISR

(

ADC_vect

)

ADC Conversion Complete Interrupt.

Calculates the Value of the current channel and switches MUX and REF to the next channel.
The flag ADCFLAG_NEWRESULTS (all channels have been updated) will be set every 564us, ADCFLAG_NEWAVERAGES will be available every 36.1ms.
Optimization for Size (-Os): This routine takes about 37us worst case.

References ADCData, ADCDataAvg, ADCDataMaxTmp, ADCDataMinTmp, ADCFLAG_NEWAVERAGES, ADCFLAG_NEWRESULTS, adcFlags, ADCData_t::array, channel, channelMismatchCnt, LEDRedOff(), and LEDRedOn().

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Variable Documentation

ADCData

volatile ADCData_t ADCData

ADC-Values for the last measurement.

Referenced by ISR().

ADCDataAvg

volatile ADCData_t ADCDataAvg

Averaged ADC-Values.

Referenced by ISR().

ADCDataMax

volatile ADCData_t ADCDataMax

Maximum ADC-Values during last average Period.

Referenced by ADCResetMinMax().

ADCDataMaxTmp

volatile ADCData_t ADCDataMaxTmp

Maximum ADC-Values in the current Period.

Referenced by ADCResetMinMax(), and ISR().

ADCDataMin

volatile ADCData_t ADCDataMin

Minimum ADC-Values during last average Period.

Referenced by ADCResetMinMax().

ADCDataMinTmp

volatile ADCData_t ADCDataMinTmp

Minimum ADC-Values in the current Period.

Referenced by ADCResetMinMax(), and ISR().

adcFlags

volatile uint8_t adcFlags

Referenced by ISR().

channel

uint8_t channel

static

Referenced by InitADC(), and ISR().

channelMismatchCnt

volatile uint16_t channelMismatchCnt

Referenced by CmdStat(), and ISR().