jens
a94413670a
- volatilize git-svn-id: http://moon:8086/svn/projects/HendiControl@35 fda53097-d464-4ada-af97-ba876c37ca34
59 lines
1.0 KiB
C
59 lines
1.0 KiB
C
/*
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* adc.c
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*
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* Created: 20.02.2019 20:46:32
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* Author: jens
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*/
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#include <stddef.h>
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#include <avr/io.h>
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#include <avr/interrupt.h>
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#include "adc.h"
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#include "message.h"
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static volatile int16_t adc_value[16];
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static volatile size_t adc_ch = 0;
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static Fifo *g_pFifo = NULL;
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ISR(ADC_vect)
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{
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int16_t value_low = (int16_t)ADCL;
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int16_t value_high = (int16_t)ADCH;
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ADCSRA |= (1<<ADIF);
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int16_t value = value_high << 8 | value_low;
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adc_value[adc_ch] = value;
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Msg_t msg = {AdcComplete, adc_getChannel()};
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fifo_push(g_pFifo, &msg);
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}
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void adc_init(Fifo *pFifo)
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{
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g_pFifo = pFifo;
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PRR &= ~(1 << PRADC);
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ADCSRA |= (1 << ADEN) | 7;
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}
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void adc_start_conversion(size_t ch)
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{
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ADMUX = (ADMUX & 0xF0) | (ch & 0x0F) | (1 << REFS0);
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ADCSRA |= (1 << ADSC) | (1 << ADIE);
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adc_ch = ch & 0x0F;
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}
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int adc_is_fininshed()
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{
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return (int)(0 == (ADCSRA & (1 << ADSC)));
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}
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size_t adc_getChannel()
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{
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return adc_ch;
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}
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int16_t adc_getData()
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{
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return adc_value[adc_ch];
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}
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