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
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
|
/*
* Copyright (c) 2006-2021, RT-Thread Development Team
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2019-03-22 balanceTWK first version
*/
#include <board.h>
#include "drv_soft_i2c.h"
#include "wm_regs.h"
#include "wm_gpio.h"
#include "pin_map.h"
#define DBG_SECTION_NAME "soft_i2c"
#define DBG_COLOR
#define DBG_LEVEL DBG_LOG
#include <rtdbg.h>
#ifdef BSP_USING_SOFT_I2C
#if !defined(BSP_USING_SOFT_I2C1) && !defined(BSP_USING_SOFT_I2C2) && !defined(BSP_USING_SOFT_I2C3)
#error "Please define at least one BSP_USING_SOFT_I2Cx"
#endif
static const struct w60x_soft_i2c_config soft_i2c_config[] =
{
#ifdef BSP_USING_SOFT_I2C1
I2C1_BUS_CONFIG,
#endif
#ifdef BSP_USING_SOFT_I2C2
I2C2_BUS_CONFIG,
#endif
#ifdef BSP_USING_SOFT_I2C3
I2C3_BUS_CONFIG,
#endif
};
static struct w60x_i2c i2c_obj[sizeof(soft_i2c_config) / sizeof(soft_i2c_config[0])];
/**
* This function initializes the i2c pin.
*
* @param w60x i2c dirver class.
*/
static void w60x_i2c_gpio_init(struct w60x_i2c *i2c)
{
struct w60x_soft_i2c_config* cfg = (struct w60x_soft_i2c_config*)i2c->ops.data;
rt_int16_t scl,sda;
scl = wm_get_pin(cfg->scl);
sda = wm_get_pin(cfg->sda);
tls_gpio_cfg((enum tls_io_name)scl, WM_GPIO_DIR_OUTPUT, WM_GPIO_ATTR_PULLHIGH);
tls_gpio_cfg((enum tls_io_name)sda, WM_GPIO_DIR_OUTPUT, WM_GPIO_ATTR_PULLHIGH);
tls_gpio_write((enum tls_io_name)scl, 1);
tls_gpio_write((enum tls_io_name)sda, 1);
}
/**
* This function sets the sda pin.
*
* @param w60x config class.
* @param The sda pin state.
*/
static void w60x_set_sda(void *data, rt_int32_t state)
{
struct w60x_soft_i2c_config* cfg = (struct w60x_soft_i2c_config*)data;
rt_int16_t sda;
sda = wm_get_pin(cfg->sda);
if (state)
{
tls_gpio_cfg((enum tls_io_name)sda, WM_GPIO_DIR_INPUT, WM_GPIO_ATTR_PULLHIGH);
}
else
{
tls_gpio_cfg((enum tls_io_name)sda, WM_GPIO_DIR_OUTPUT, WM_GPIO_ATTR_FLOATING);
tls_gpio_write((enum tls_io_name)sda, 0);
}
}
/**
* This function sets the scl pin.
*
* @param w60x config class.
* @param The scl pin state.
*/
static void w60x_set_scl(void *data, rt_int32_t state)
{
struct w60x_soft_i2c_config* cfg = (struct w60x_soft_i2c_config*)data;
rt_int16_t scl;
scl = wm_get_pin(cfg->scl);
if (state)
{
tls_gpio_cfg((enum tls_io_name)scl, WM_GPIO_DIR_INPUT, WM_GPIO_ATTR_PULLHIGH);
}
else
{
tls_gpio_cfg((enum tls_io_name)scl, WM_GPIO_DIR_OUTPUT, WM_GPIO_ATTR_FLOATING);
tls_gpio_write((enum tls_io_name)scl, 0);
}
}
/**
* This function gets the sda pin state.
*
* @param The sda pin state.
*/
static rt_int32_t w60x_get_sda(void *data)
{
struct w60x_soft_i2c_config* cfg = (struct w60x_soft_i2c_config*)data;
rt_int16_t sda;
sda = wm_get_pin(cfg->sda);
return tls_gpio_read((enum tls_io_name)sda);
}
/**
* This function gets the scl pin state.
*
* @param The scl pin state.
*/
static rt_int32_t w60x_get_scl(void *data)
{
struct w60x_soft_i2c_config* cfg = (struct w60x_soft_i2c_config*)data;
rt_int16_t scl;
scl = wm_get_pin(cfg->scl);
return tls_gpio_read((enum tls_io_name)scl);
}
static const struct rt_i2c_bit_ops w60x_bit_ops_default =
{
.data = RT_NULL,
.set_sda = w60x_set_sda,
.set_scl = w60x_set_scl,
.get_sda = w60x_get_sda,
.get_scl = w60x_get_scl,
.udelay = rt_hw_us_delay,
.delay_us = 1,
.timeout = 100
};
/**
* if i2c is locked, this function will unlock it
*
* @param w60x config class
*
* @return RT_EOK indicates successful unlock.
*/
static rt_err_t w60x_i2c_bus_unlock(const struct w60x_soft_i2c_config *cfg)
{
rt_int32_t i = 0;
if (PIN_LOW == rt_pin_read(cfg->sda))
{
while (i++ < 9)
{
rt_pin_write(cfg->scl, PIN_HIGH);
rt_hw_us_delay(100);
rt_pin_write(cfg->scl, PIN_LOW);
rt_hw_us_delay(100);
}
}
if (PIN_LOW == rt_pin_read(cfg->sda))
{
return -RT_ERROR;
}
return RT_EOK;
}
/* I2C initialization function */
int rt_soft_i2c_init(void)
{
rt_size_t obj_num = sizeof(i2c_obj) / sizeof(struct w60x_i2c);
rt_err_t result;
for (int i = 0; i < obj_num; i++)
{
i2c_obj[i].ops = w60x_bit_ops_default;
i2c_obj[i].ops.data = (void*)&soft_i2c_config[i];
i2c_obj[i].i2c2_bus.priv = &i2c_obj[i].ops;
w60x_i2c_gpio_init(&i2c_obj[i]);
result = rt_i2c_bit_add_bus(&i2c_obj[i].i2c2_bus, soft_i2c_config[i].bus_name);
RT_ASSERT(result == RT_EOK);
w60x_i2c_bus_unlock(&soft_i2c_config[i]);
LOG_D("software simulation %s init done, pin scl: %d, pin sda %d",
soft_i2c_config[i].bus_name,
soft_i2c_config[i].scl,
soft_i2c_config[i].sda);
}
return RT_EOK;
}
INIT_DEVICE_EXPORT(rt_soft_i2c_init);
#endif /* BSP_USING_SOFT_I2C */
|
