bitbang_i2c.h · samitouri/QOSamiQemu

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1	#ifndef BITBANG_I2C_H
2	#define BITBANG_I2C_H
3
4	#include "hw/i2c/i2c.h"
5
6	#define TYPE_GPIO_I2C "gpio_i2c"
7
8	typedef struct bitbang_i2c_interface bitbang_i2c_interface;
9
10	#define BITBANG_I2C_SDA 0
11	#define BITBANG_I2C_SCL 1
12
13	typedef enum bitbang_i2c_state {
14	STOPPED = 0,
15	SENDING_BIT7,
16	SENDING_BIT6,
17	SENDING_BIT5,
18	SENDING_BIT4,
19	SENDING_BIT3,
20	SENDING_BIT2,
21	SENDING_BIT1,
22	SENDING_BIT0,
23	WAITING_FOR_ACK,
24	RECEIVING_BIT7,
25	RECEIVING_BIT6,
26	RECEIVING_BIT5,
27	RECEIVING_BIT4,
28	RECEIVING_BIT3,
29	RECEIVING_BIT2,
30	RECEIVING_BIT1,
31	RECEIVING_BIT0,
32	SENDING_ACK,
33	SENT_NACK
34	} bitbang_i2c_state;
35
36	struct bitbang_i2c_interface {
37	I2CBus *bus;
38	bitbang_i2c_state state;
39	int last_data;
40	int last_clock;
41	int device_out;
42	uint8_t buffer;
43	int current_addr;
44	};
45
46	/**
47	* bitbang_i2c_init: in-place initialize the bitbang_i2c_interface struct
48	*/
49	void bitbang_i2c_init(bitbang_i2c_interface s, I2CBus bus);
50	int bitbang_i2c_set(bitbang_i2c_interface *i2c, int line, int level);
51
52	#endif