Split up main.c

1 files changed, 51 insertions, 0 deletions

diff --git a/i2c.h b/i2c.h
new file mode 100644
index 0000000..1381663
--- /dev/null
+++ b/i2c.h
@@ -0,0 +1,51 @@
+#ifndef TW_H
+#define TW_H
+
+typedef enum {
+	TWM_INVALID = 0,
+	TWM_WRITE,
+	TWM_READ_MULTI,
+} twMode;
+
+typedef enum {
+	TWST_WAIT = 0,
+	TWST_OK = 1,
+	TWST_ERR = 2,
+} twStatus;
+
+#include <stdint.h>
+
+typedef struct {
+	twMode mode;
+	uint8_t address;
+	uint8_t subaddress;
+	uint8_t data;
+	uint8_t step;
+	/* read data store */
+	uint8_t *retData;
+	/* number of bytes to be read */
+	uint8_t count;
+	/* current byte */
+	uint8_t i;
+	twStatus status;
+} twReq;
+
+extern volatile twReq twr;
+
+/* i2c device addresses */
+#define L3GD20 0b11010100
+#define L3GD20_WHOAMI 0xf
+#define L3GD20_CTRLREG1 0x20
+#define LIS302DL 0b00111000
+#define LIS302DL_WHOAMI 0xf
+#define LIS302DL_CTRLREG1 0x20
+
+#include <stdbool.h>
+
+void twInit ();
+bool twWrite (const uint8_t address, const uint8_t subaddress,
+		const uint8_t data);
+bool twReadMulti (const uint8_t address, const uint8_t subaddress,
+		uint8_t * const retData, const uint8_t count);
+
+#endif /* TW_H */