- renamed folder

git-svn-id: http://moon:8086/svn/projects/HendiControl@161 fda53097-d464-4ada-af97-ba876c37ca34
2019-03-30 00:53:10 +00:00
parent 9035753d6c
commit d2a116ce13
17 changed files with 0 additions and 0 deletions
@@ -0,0 +1,68 @@
+/*
+ * adc.c
+ *
+ * Created: 20.02.2019 20:46:32
+ *  Author: jens
+ */ 
+
+#include <stddef.h>
+#include <avr/io.h>
+#include <avr/interrupt.h>
+#include "adc.h"
+#include "message.h"
+
+static volatile uint8_t adc_ch = 0;
+static Fifo *g_pFifo = NULL;
+static Fifo g_conversionFifo;
+static int conversionBusy = 0;
+
+ISR(ADC_vect)
+{
+	conversionBusy = 0;
+	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;
+
+	Msg_t msg = 
+	{
+		.code = AdcComplete,
+		.m.adc.ch = adc_ch,
+		.m.adc.data = value,
+	};
+	fifo_push(g_pFifo, &msg);
+	if (!fifo_isEmpty(&g_conversionFifo))
+	{
+		uint8_t ch;
+		fifo_pop(&g_conversionFifo, &ch);
+		adc_start_conversion(ch);
+	}
+}
+
+void adc_init(Fifo *pFifo)
+{
+	g_pFifo = pFifo;
+	fifo_init(&g_conversionFifo, 16, sizeof(uint8_t), "ConvFifo");
+	PRR &= ~(1 << PRADC);
+	ADCSRA |= (1 << ADEN) | 7;
+}
+
+void adc_start_conversion(uint8_t ch)
+{
+	ADMUX = (ADMUX & 0xF0) | (ch & 0x0F) | (1 << REFS0);
+	ADCSRA |= (1 << ADSC) | (1 << ADIE);
+	adc_ch = ch & 0x0F;
+	conversionBusy = 1;
+}
+
+void adc_enqueue_conversion(uint8_t ch)
+{
+	if (!conversionBusy)
+	{
+		adc_start_conversion(ch);
+	}
+	else
+	{
+		fifo_push(&g_conversionFifo, &ch);
+	}
+}