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
211
212
213
214
215
216
217
218
219
220
221
222
223
224
|
/*
* Copyright (c) 2006-2023, RT-Thread Development Team
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2022-6-14 solar first version
*/
#include <board.h>
#include "drv_soft_spi.h"
#include "drv_config.h"
#if defined(RT_USING_SPI) && defined(RT_USING_SPI_BITOPS) && defined(RT_USING_PIN)
//#define DRV_DEBUG
#define LOG_TAG "drv.soft_spi"
#include <drv_log.h>
static struct stm32_soft_spi_config soft_spi_config[] =
{
#ifdef BSP_USING_SOFT_SPI1
SOFT_SPI1_BUS_CONFIG,
#endif
#ifdef BSP_USING_SOFT_SPI2
SOFT_SPI2_BUS_CONFIG,
#endif
};
/**
* Attach the spi device to soft SPI bus, this function must be used after initialization.
*/
rt_err_t rt_hw_softspi_device_attach(const char *bus_name, const char *device_name, rt_base_t cs_pin)
{
rt_err_t result;
struct rt_spi_device *spi_device;
/* attach the device to soft spi bus*/
spi_device = (struct rt_spi_device *)rt_malloc(sizeof(struct rt_spi_device));
RT_ASSERT(spi_device != RT_NULL);
result = rt_spi_bus_attach_device_cspin(spi_device, device_name, bus_name, cs_pin, RT_NULL);
return result;
}
static void stm32_spi_gpio_init(struct stm32_soft_spi *spi)
{
struct stm32_soft_spi_config *cfg = (struct stm32_soft_spi_config *)spi->cfg;
rt_pin_mode(cfg->sck, PIN_MODE_OUTPUT);
rt_pin_mode(cfg->miso, PIN_MODE_INPUT);
rt_pin_mode(cfg->mosi, PIN_MODE_OUTPUT);
rt_pin_write(cfg->miso, PIN_HIGH);
rt_pin_write(cfg->sck, PIN_HIGH);
rt_pin_write(cfg->mosi, PIN_HIGH);
}
void stm32_tog_sclk(void *data)
{
struct stm32_soft_spi_config* cfg = (struct stm32_soft_spi_config*)data;
if(rt_pin_read(cfg->sck) == PIN_HIGH)
{
rt_pin_write(cfg->sck, PIN_LOW);
}
else
{
rt_pin_write(cfg->sck, PIN_HIGH);
}
}
void stm32_set_sclk(void *data, rt_int32_t state)
{
struct stm32_soft_spi_config* cfg = (struct stm32_soft_spi_config*)data;
if (state)
{
rt_pin_write(cfg->sck, PIN_HIGH);
}
else
{
rt_pin_write(cfg->sck, PIN_LOW);
}
}
void stm32_set_mosi(void *data, rt_int32_t state)
{
struct stm32_soft_spi_config* cfg = (struct stm32_soft_spi_config*)data;
if (state)
{
rt_pin_write(cfg->mosi, PIN_HIGH);
}
else
{
rt_pin_write(cfg->mosi, PIN_LOW);
}
}
void stm32_set_miso(void *data, rt_int32_t state)
{
struct stm32_soft_spi_config* cfg = (struct stm32_soft_spi_config*)data;
if (state)
{
rt_pin_write(cfg->miso, PIN_HIGH);
}
else
{
rt_pin_write(cfg->miso, PIN_LOW);
}
}
rt_int32_t stm32_get_sclk(void *data)
{
struct stm32_soft_spi_config* cfg = (struct stm32_soft_spi_config*)data;
return rt_pin_read(cfg->sck);
}
rt_int32_t stm32_get_mosi(void *data)
{
struct stm32_soft_spi_config* cfg = (struct stm32_soft_spi_config*)data;
return rt_pin_read(cfg->mosi);
}
rt_int32_t stm32_get_miso(void *data)
{
struct stm32_soft_spi_config* cfg = (struct stm32_soft_spi_config*)data;
return rt_pin_read(cfg->miso);
}
void stm32_dir_mosi(void *data, rt_int32_t state)
{
struct stm32_soft_spi_config* cfg = (struct stm32_soft_spi_config*)data;
if (state)
{
rt_pin_mode(cfg->mosi, PIN_MODE_INPUT);
}
else
{
rt_pin_mode(cfg->mosi, PIN_MODE_OUTPUT);
}
}
void stm32_dir_miso(void *data, rt_int32_t state)
{
struct stm32_soft_spi_config* cfg = (struct stm32_soft_spi_config*)data;
if (state)
{
rt_pin_mode(cfg->miso, PIN_MODE_INPUT);
}
else
{
rt_pin_mode(cfg->miso, PIN_MODE_OUTPUT);
}
}
static void stm32_udelay(rt_uint32_t us)
{
rt_uint32_t ticks;
rt_uint32_t told, tnow, tcnt = 0;
rt_uint32_t reload = SysTick->LOAD;
ticks = us * reload / (1000000UL / RT_TICK_PER_SECOND);
told = SysTick->VAL;
while (1)
{
tnow = SysTick->VAL;
if (tnow != told)
{
if (tnow < told)
{
tcnt += told - tnow;
}
else
{
tcnt += reload - tnow + told;
}
told = tnow;
if (tcnt >= ticks)
{
break;
}
}
}
}
static struct rt_spi_bit_ops stm32_soft_spi_ops =
{
.data = RT_NULL,
.tog_sclk = stm32_tog_sclk,
.set_sclk = stm32_set_sclk,
.set_mosi = stm32_set_mosi,
.set_miso = stm32_set_miso,
.get_sclk = stm32_get_sclk,
.get_mosi = stm32_get_mosi,
.get_miso = stm32_get_miso,
.dir_mosi = stm32_dir_mosi,
.dir_miso = stm32_dir_miso,
.udelay = stm32_udelay,
.delay_us = 1,
};
static struct stm32_soft_spi spi_obj[sizeof(soft_spi_config) / sizeof(soft_spi_config[0])];
/* Soft SPI initialization function */
int rt_hw_softspi_init(void)
{
rt_size_t obj_num = sizeof(spi_obj) / sizeof(struct stm32_soft_spi);
rt_err_t result;
for (int i = 0; i < obj_num; i++)
{
stm32_soft_spi_ops.data = (void *)&soft_spi_config[i];
spi_obj[i].spi.ops = &stm32_soft_spi_ops;
spi_obj[i].cfg = (void *)&soft_spi_config[i];
stm32_spi_gpio_init(&spi_obj[i]);
result = rt_spi_bit_add_bus(&spi_obj[i].spi, soft_spi_config[i].bus_name, &stm32_soft_spi_ops);
RT_ASSERT(result == RT_EOK);
}
return RT_EOK;
}
INIT_BOARD_EXPORT(rt_hw_softspi_init);
#endif /* defined(RT_USING_SPI) && defined(RT_USING_SPI_BITOPS) && defined(RT_USING_PIN) */
|
