From: Jan "Yenya" Kasprzak <kas@fi.muni.cz>
Date: Fri, 8 Jun 2012 16:43:08 +0000 (+0200)
Subject: ADC experiments
X-Git-Tag: gedasymbols-20120913~67
X-Git-Url: https://www.fi.muni.cz/~kas/git//home/kas/public_html/git/?a=commitdiff_plain;h=1198700abdd06ef61ab82ed42b853dbfc21dd300;p=bike-lights.git

ADC experiments
---

diff --git a/lights.c b/lights.c
index 0bedc53..49bf4ce 100644
--- a/lights.c
+++ b/lights.c
@@ -2,7 +2,7 @@
 #include <avr/eeprom.h>
 #include <util/delay.h>
 
-char dbg[5] __attribute__((section(".eeprom")));
+uint16_t adcval EEMEM;
 
 int main(void)
 {
@@ -15,12 +15,15 @@ int main(void)
 	DDRB |= _BV( PB5 );
 	PORTB &= ~_BV( PB5 );
 
+	ADCSRA = _BV(ADEN) | _BV(ADATE) | _BV(ADPS1) | _BV(ADPS0);
+	ADMUX = _BV(REFS1) | _BV(MUX0);
+	ADCSRB = _BV(REFS2);
+	DIDR0 = _BV(ADC1D) | _BV(AREFD);
+
+	ADCSRA |= _BV(ADSC);
 	_delay_ms(1000);
-	eeprom_write_byte(&dbg[0], TCNT1);
-	eeprom_write_byte(&dbg[1], OCR1C);
-	eeprom_write_byte(&dbg[2], OCR1D);
-	eeprom_write_byte(&dbg[3], TIFR);
-	eeprom_write_byte(&dbg[4], TCCR1B);
+	eeprom_write_word(&adcval, ADCW);
+
     DDRA |= _BV( PA0 );
     while( 1 ) { 
         PORTA |=  _BV( PA0 );