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
225
226
227
228
229
|
/*
* File : drv_spi.c
* This file is part of RT-Thread RTOS
* COPYRIGHT (C) 2006 - 2012, RT-Thread Development Team
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Change Logs:
* Date Author Notes
* 2017-11-02 ���� first version
*/
#include <rtthread.h>
#include <drivers/spi.h>
#include "drv_spi.h"
//#define DEBUG
#ifdef DEBUG
#define DEBUG_PRINTF(...) rt_kprintf(__VA_ARGS__)
#else
#define DEBUG_PRINTF(...)
#endif
static rt_err_t configure(struct rt_spi_device *device, struct rt_spi_configuration *configuration);
static rt_uint32_t xfer(struct rt_spi_device *device, struct rt_spi_message *message);
static struct rt_spi_ops ls1c_spi_ops =
{
.configure = configure,
.xfer = xfer
};
static rt_err_t configure(struct rt_spi_device *device,
struct rt_spi_configuration *configuration)
{
struct rt_spi_bus *spi_bus = NULL;
struct ls1c_spi *ls1c_spi = NULL;
unsigned char SPIx = 0;
void *spi_base = NULL;
unsigned char cpol = 0;
unsigned char cpha = 0;
unsigned char val = 0;
RT_ASSERT(NULL != device);
RT_ASSERT(NULL != configuration);
spi_bus = device->bus;
ls1c_spi = (struct ls1c_spi *)spi_bus->parent.user_data;
SPIx = ls1c_spi->SPIx;
spi_base = ls1c_spi_get_base(SPIx);
{
// ʹ��SPI��������masterģʽ���ر��ж�
reg_write_8(0x53, spi_base + LS1C_SPI_SPCR_OFFSET);
// ���״̬�Ĵ���
reg_write_8(0xc0, spi_base + LS1C_SPI_SPSR_OFFSET);
// 1�ֽڲ����жϣ�����(��)�뷢��(д)ʱ��ͬʱ
reg_write_8(0x03, spi_base + LS1C_SPI_SPER_OFFSET);
// �ر�SPI flash
val = reg_read_8(spi_base + LS1C_SPI_SFC_PARAM_OFFSET);
val &= 0xfe;
reg_write_8(val, spi_base + LS1C_SPI_SFC_PARAM_OFFSET);
// spi flashʱ����ƼĴ���
reg_write_8(0x05, spi_base + LS1C_SPI_SFC_TIMING_OFFSET);
}
// baudrate
ls1c_spi_set_clock(spi_base, configuration->max_hz);
// ����ͨ��ģʽ(ʱ�Ӽ��Ժ���λ)
if (configuration->mode & RT_SPI_CPOL) // cpol
{
cpol = SPI_CPOL_1;
}
else
{
cpol = SPI_CPOL_0;
}
if (configuration->mode & RT_SPI_CPHA) // cpha
{
cpha = SPI_CPHA_1;
}
else
{
cpha = SPI_CPHA_0;
}
ls1c_spi_set_mode(spi_base, cpol, cpha);
DEBUG_PRINTF("ls1c spi%d configuration\n", SPIx);
return RT_EOK;
}
static rt_uint32_t xfer(struct rt_spi_device *device,
struct rt_spi_message *message)
{
struct rt_spi_bus *spi_bus = NULL;
struct ls1c_spi *ls1c_spi = NULL;
void *spi_base = NULL;
unsigned char SPIx = 0;
struct ls1c_spi_cs *ls1c_spi_cs = NULL;
unsigned char cs = 0;
rt_uint32_t size = 0;
const rt_uint8_t *send_ptr = NULL;
rt_uint8_t *recv_ptr = NULL;
rt_uint8_t data = 0;
RT_ASSERT(NULL != device);
RT_ASSERT(NULL != message);
spi_bus = device->bus;
ls1c_spi = spi_bus->parent.user_data;
SPIx = ls1c_spi->SPIx;
spi_base = ls1c_spi_get_base(SPIx);
ls1c_spi_cs = device->parent.user_data;
cs = ls1c_spi_cs->cs;
size = message->length;
DEBUG_PRINTF("[%s] SPIx=%d, cs=%d\n", __FUNCTION__, SPIx, cs);
// take cs
if (message->cs_take)
{
ls1c_spi_set_cs(spi_base, cs, 0);
}
// �շ�����
send_ptr = message->send_buf;
recv_ptr = message->recv_buf;
while (size--)
{
data = 0xFF;
if (NULL != send_ptr)
{
data = *send_ptr++;
}
if (NULL != recv_ptr)
{
*recv_ptr++ = ls1c_spi_txrx_byte(spi_base, data);
}
else
{
ls1c_spi_txrx_byte(spi_base, data);
}
}
// release cs
if (message->cs_release)
{
ls1c_spi_set_cs(spi_base, cs, 1);
}
return message->length;
}
#ifdef RT_USING_SPI0
struct ls1c_spi ls1c_spi0 =
{
.SPIx = LS1C_SPI_0,
};
static struct rt_spi_bus spi0_bus;
#endif
#ifdef RT_USING_SPI1
struct ls1c_spi ls1c_spi1 =
{
.SPIx = LS1C_SPI_1,
};
static struct rt_spi_bus spi1_bus;
#endif
/*
* ��ʼ����ע����о1c��spi����
* @SPI SPI���ߣ�����LS1C_SPI_0�� LS1C_SPI_1
* @spi_bus_name ��������
* @ret
*/
rt_err_t ls1c_spi_bus_register(rt_uint8_t SPI, const char *spi_bus_name)
{
struct rt_spi_bus *spi_bus = NULL;
#ifdef RT_USING_SPI0
if (LS1C_SPI_0 == SPI)
{
spi_bus = &spi0_bus;
spi_bus->parent.user_data = &ls1c_spi0;
}
#endif
#ifdef RT_USING_SPI1
if (LS1C_SPI_1 == SPI)
{
spi_bus = &spi1_bus;
spi_bus->parent.user_data = &ls1c_spi1;
}
#endif
return rt_spi_bus_register(spi_bus, spi_bus_name, &ls1c_spi_ops);
}
|
