1 files changed, 39 insertions, 0 deletions
diff --git a/sensor_dht22.h b/sensor_dht22.h
new file mode 100644
index 0000000..0776b77
--- /dev/null
+++ b/sensor_dht22.h
@@ -0,0 +1,39 @@
+#include <avr/io.h>
+#include <util/delay.h>
+#include <stdint.h>
+
+#include "tasks.h"
+#include "timer.h"
+
+#ifndef _DHT22_H_
+#define _DHT22_H_
+
+struct dht22_value {
+    uint8_t integral;
+    uint8_t decimal;
+};
+
+struct dht22_port {
+    volatile uint8_t *DDR;  // Address of DDR register
+    volatile uint8_t *PORT; // Address of PORT register
+    volatile uint8_t *PIN;  // Address of PIN register
+    uint8_t MASK;   // _BV() of index of port
+    volatile uint8_t *PCMSK;    // Address of relevant PCMSK register
+    uint8_t PCMSK_MASK; // _BV() of index of PCMSK
+};
+
+extern const struct dht22_port dht22_ports[];
+
+/*
+ * Initialize port for sensor
+ */
+void dht22_init(uint8_t port);
+/*
+ * Read values from dht22
+ * rh - relative
+ * t  - temperature
+ */
+int8_t dht22_read(uint8_t portindex, struct dht22_value *rh,
+                  struct dht22_value *t);
+
+#endif /* _DHT22_H_ */