blob: 5416627cf0f7ed7bf81430808b204e4ac3ce8125 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
|
/*
* Copyright (c) 2006-2022, RT-Thread Development Team
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2011-01-07 onelife Initial creation for EFM32
* 2011-07-11 onelife Add lock (semaphore) to prevent simultaneously access
* 2011-08-04 onelife Change the usage of the second parameter of Read
* and Write functions from (seldom used) "Offset" to "Slave address"
* 2011-08-04 onelife Add a timer to prevent from forever waiting
* 2011-12-27 onelife Change IIC read format
*/
#ifndef __DRV_IIC_H__
#define __DRV_IIC_H__
/* Includes ------------------------------------------------------------------*/
/* Exported types ------------------------------------------------------------*/
struct efm32_iic_int_mode_t
{
rt_uint8_t *data_ptr;
rt_uint8_t data_size;
rt_uint32_t read_index, save_index;
};
struct efm32_iic_device_t
{
/* Counter */
rt_uint32_t counter;
/* Lock */
struct rt_semaphore *lock;
/* Pointer to timer */
rt_timer_t timer;
/* Timeout flag */
volatile rt_bool_t timeout;
/* State */
rt_uint8_t state;
/* Pointer to IIC device structure */
I2C_TypeDef *iic_device;
/* Self address */
rt_uint16_t address;
/* RX structure */
struct efm32_iic_int_mode_t *rx_buffer;
};
struct efm32_iic_control_t
{
rt_uint8_t config;
rt_uint16_t address;
};
/* Exported constants --------------------------------------------------------*/
/* Exported macro ------------------------------------------------------------*/
#define IIC_STATE_MASTER (1 << 0)
#define IIC_STATE_BROADCAST (1 << 1)
//#define IIC_STATE_TX_BUSY (1 << 2)
#define IIC_STATE_RX_BUSY (1 << 3)
#define IIC_TIMEOUT_PERIOD (RT_TICK_PER_SECOND)
#define IIC_OP_READ_ONLY (0xFF)
/* Exported functions --------------------------------------------------------*/
void rt_hw_iic_init(void);
#endif /* __DRV_IIC_H__ */
|
