- adc is event based

- changed timer frequency
- prepared for SW timer
- added PowerSwitch_in


git-svn-id: http://moon:8086/svn/projects/HendiControl@30 fda53097-d464-4ada-af97-ba876c37ca34

Control/firmware/uart_echo/adc.c

@@ -5,19 +5,40 @@
  *  Author: jens
  */ 
 
+#include <stddef.h>
 #include <avr/io.h>
+#include <avr/interrupt.h>
 #include "adc.h"
+#include "message.h"
 
-void adc_init()
+static int16_t adc_value[16];
+static size_t adc_ch = 0;
+static Fifo *g_pFifo = NULL;
+
+ISR(ADC_vect)
 {
+	int16_t value_low = (int16_t)ADCL;
+	int16_t value_high = (int16_t)ADCH;
+	ADCSRA |= (1<<ADIF);
+	int16_t value = value_high << 8 | value_low;
+	adc_value[adc_ch] = value;
+
+	Msg_t msg = {AdcComplete, adc_getChannel()};
+	fifo_push(g_pFifo, &msg);
+}
+
+void adc_init(Fifo *pFifo)
+{
+	g_pFifo = pFifo;
 	PRR &= ~(1 << PRADC);
 	ADCSRA |= (1 << ADEN) | 7;
 }
 
-void adc_start_conversion(int ch)
+void adc_start_conversion(size_t ch)
 {
 	ADMUX = (ADMUX & 0xF0) | (ch & 0x0F) | (1 << REFS0);
 	ADCSRA |= (1 << ADSC) | (1 << ADIE);
+	adc_ch = ch & 0x0F;
 }
 
 int adc_is_fininshed()
@@ -25,3 +46,13 @@ int adc_is_fininshed()
 	return (int)(0 == (ADCSRA & (1 << ADSC)));
 }
 
+size_t adc_getChannel()
+{
+	return adc_ch;
+}
+
+int16_t adc_getData()
+{
+	return adc_value[adc_ch];
+}
+