init

1 files changed, 19 insertions, 0 deletions

diff --git a/analog_read.c b/analog_read.c
new file mode 100644
index 0000000..5ea0b21
--- /dev/null
+++ b/analog_read.c
@@ -0,0 +1,19 @@
+#include <avr/io.h>
+#include "pins.h"
+
+void init_adc() {
+  PRR = 0;
+  DDRF = 0;
+
+  //enable ADC0 input, refrence is AREF (wire to 5v)
+  ADMUX = 0b01100000; 
+
+  //enable adc, disable interrupts, clear pending reading, slowest speed
+  ADCSRA = 0b10000111; 
+}
+
+uint8_t analog_read_8bit() {
+  ADCSRA |= (1 << ADSC);
+  while(ADCSRA & (1 << ADSC));
+  return ADCH;
+}