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
|
/*
* Copyright (c) 2006-2024, RT-Thread Development Team
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2023-06-02 Chushicheng the first version
*/
#include "drv_soft_spi.h"
#include "board.h"
#if defined BSP_USING_SOFT_SPI
#define LOG_TAG "drv.soft_spi"
#include <rtdbg.h>
static struct pico_soft_spi_config soft_spi_config[] =
{
#ifdef BSP_USING_SOFT_SPI0
SOFT_SPI0_BUS_CONFIG,
#endif
#ifdef BSP_USING_SOFT_SPI1
SOFT_SPI1_BUS_CONFIG,
#endif
};
static struct pico_soft_spi spi_obj[sizeof(soft_spi_config) / sizeof(soft_spi_config[0])];
/**
* 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 pico_spi_gpio_init(struct pico_soft_spi *spi)
{
struct pico_soft_spi_config *cfg = (struct pico_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);
}
static void pico_tog_sclk(void *data)
{
struct pico_soft_spi_config* cfg = (struct pico_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);
}
}
static void pico_set_sclk(void *data, rt_int32_t state)
{
struct pico_soft_spi_config* cfg = (struct pico_soft_spi_config*)data;
if (state)
{
rt_pin_write(cfg->sck, PIN_HIGH);
}
else
{
rt_pin_write(cfg->sck, PIN_LOW);
}
}
static void pico_set_mosi(void *data, rt_int32_t state)
{
struct pico_soft_spi_config* cfg = (struct pico_soft_spi_config*)data;
if (state)
{
rt_pin_write(cfg->mosi, PIN_HIGH);
}
else
{
rt_pin_write(cfg->mosi, PIN_LOW);
}
}
static void pico_set_miso(void *data, rt_int32_t state)
{
struct pico_soft_spi_config* cfg = (struct pico_soft_spi_config*)data;
if (state)
{
rt_pin_write(cfg->miso, PIN_HIGH);
}
else
{
rt_pin_write(cfg->miso, PIN_LOW);
}
}
static rt_int32_t pico_get_sclk(void *data)
{
struct pico_soft_spi_config* cfg = (struct pico_soft_spi_config*)data;
return rt_pin_read(cfg->sck);
}
static rt_int32_t pico_get_mosi(void *data)
{
struct pico_soft_spi_config* cfg = (struct pico_soft_spi_config*)data;
return rt_pin_read(cfg->mosi);
}
static rt_int32_t pico_get_miso(void *data)
{
struct pico_soft_spi_config* cfg = (struct pico_soft_spi_config*)data;
return rt_pin_read(cfg->miso);
}
static void pico_dir_mosi(void *data, rt_int32_t state)
{
struct pico_soft_spi_config* cfg = (struct pico_soft_spi_config*)data;
if (state)
{
rt_pin_mode(cfg->mosi, PIN_MODE_INPUT);
}
else
{
rt_pin_mode(cfg->mosi, PIN_MODE_OUTPUT);
}
}
static void pico_dir_miso(void *data, rt_int32_t state)
{
struct pico_soft_spi_config* cfg = (struct pico_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 pico_udelay(rt_uint32_t us)
{
busy_wait_us_32(us);
}
static void pico_pin_init(void)
{
rt_size_t obj_num = sizeof(spi_obj) / sizeof(struct pico_soft_spi);
for(rt_size_t i = 0; i < obj_num; i++)
{
pico_spi_gpio_init(&spi_obj[i]);
}
}
static struct rt_spi_bit_ops pico_soft_spi_ops =
{
.data = RT_NULL,
.pin_init = pico_pin_init,
.tog_sclk = pico_tog_sclk,
.set_sclk = pico_set_sclk,
.set_mosi = pico_set_mosi,
.set_miso = pico_set_miso,
.get_sclk = pico_get_sclk,
.get_mosi = pico_get_mosi,
.get_miso = pico_get_miso,
.dir_mosi = pico_dir_mosi,
.dir_miso = pico_dir_miso,
.udelay = pico_udelay,
.delay_us = 1,
};
/* Soft SPI initialization function */
int rt_hw_softspi_init(void)
{
rt_size_t obj_num = sizeof(spi_obj) / sizeof(struct pico_soft_spi);
rt_err_t result;
for (rt_size_t i = 0; i < obj_num; i++)
{
pico_soft_spi_ops.data = (void *)&soft_spi_config[i];
spi_obj[i].spi.ops = &pico_soft_spi_ops;
spi_obj[i].cfg = (void *)&soft_spi_config[i];
result = rt_spi_bit_add_bus(&spi_obj[i].spi, soft_spi_config[i].bus_name, &pico_soft_spi_ops);
RT_ASSERT(result == RT_EOK);
}
return RT_EOK;
}
INIT_DEVICE_EXPORT(rt_hw_softspi_init);
#endif /* BSP_USING_SOFT_SPI */
|
