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
|
/*
* Copyright (c) 2006-2021, RT-Thread Development Team
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2017-08-08 Yang the first version
*/
#include <rtthread.h>
#include <rtdevice.h>
#include "board.h"
#include "fsl_iocon.h"
#include "fsl_i2c.h"
#ifdef RT_USING_I2C
#define IOCON_PIO_DIGITAL_EN 0x0100u /*!< Enables digital function */
#define IOCON_PIO_FUNC0 0x00u /*!< Selects pin function 0 */
#define IOCON_PIO_FUNC1 0x01u /*!< Selects pin function 1 */
#define IOCON_PIO_FUNC6 0x06u /*!< Selects pin function 6 */
#define IOCON_PIO_I2CDRIVE_HIGH 0x0400u /*!< High drive: 20 mA */
#define IOCON_PIO_I2CFILTER_EN 0x00u /*!< I2C 50 ns glitch filter enabled */
#define IOCON_PIO_I2CSLEW_I2C 0x00u /*!< I2C mode */
#define IOCON_PIO_INPFILT_OFF 0x0200u /*!< Input filter disabled */
#define IOCON_PIO_INV_DI 0x00u /*!< Input function is not inverted */
#define IOCON_PIO_MODE_INACT 0x00u /*!< No addition pin function */
#define IOCON_PIO_MODE_PULLUP 0x20u /*!< Selects pull-up function */
#define IOCON_PIO_OPENDRAIN_DI 0x00u /*!< Open drain is disabled */
#define IOCON_PIO_SLEW_FAST 0x0400u /*!< Fast mode, slew rate control is disabled */
#define IOCON_PIO_SLEW_STANDARD 0x00u /*!< Standard mode, output slew rate control is enabled */
#define PIN0_IDX 0u /*!< Pin number for pin 0 in a port 3 */
#define PIN1_IDX 1u /*!< Pin number for pin 1 in a port 3 */
#define PIN2_IDX 2u /*!< Pin number for pin 2 in a port 0 */
#define PIN3_IDX 3u /*!< Pin number for pin 3 in a port 0 */
#define PIN4_IDX 4u /*!< Pin number for pin 4 in a port 0 */
#define PIN5_IDX 5u /*!< Pin number for pin 5 in a port 0 */
#define PIN6_IDX 6u /*!< Pin number for pin 6 in a port 0 */
#define PIN7_IDX 7u /*!< Pin number for pin 7 in a port 0 */
#define PIN8_IDX 8u /*!< Pin number for pin 8 in a port 0 */
#define PIN9_IDX 9u /*!< Pin number for pin 9 in a port 0 */
#define PIN10_IDX 10u /*!< Pin number for pin 10 in a port 1 */
#define PIN11_IDX 11u /*!< Pin number for pin 11 in a port 1 */
#define PIN12_IDX 12u /*!< Pin number for pin 12 in a port 1 */
#define PIN13_IDX 13u /*!< Pin number for pin 13 in a port 1 */
#define PIN14_IDX 14u /*!< Pin number for pin 14 in a port 1 */
#define PIN15_IDX 15u /*!< Pin number for pin 15 in a port 0 */
#define PIN16_IDX 16u /*!< Pin number for pin 16 in a port 1 */
#define PIN18_IDX 18u /*!< Pin number for pin 18 in a port 0 */
#define PIN19_IDX 19u /*!< Pin number for pin 19 in a port 0 */
#define PIN20_IDX 20u /*!< Pin number for pin 20 in a port 0 */
#define PIN21_IDX 21u /*!< Pin number for pin 21 in a port 0 */
#define PIN22_IDX 22u /*!< Pin number for pin 22 in a port 2 */
#define PIN23_IDX 23u /*!< Pin number for pin 23 in a port 1 */
#define PIN24_IDX 24u /*!< Pin number for pin 24 in a port 1 */
#define PIN25_IDX 25u /*!< Pin number for pin 25 in a port 1 */
#define PIN26_IDX 26u /*!< Pin number for pin 26 in a port 1 */
#define PIN27_IDX 27u /*!< Pin number for pin 27 in a port 1 */
#define PIN28_IDX 28u /*!< Pin number for pin 28 in a port 1 */
#define PIN29_IDX 29u /*!< Pin number for pin 29 in a port 0 */
#define PIN30_IDX 30u /*!< Pin number for pin 30 in a port 0 */
#define PIN31_IDX 31u /*!< Pin number for pin 31 in a port 1 */
#define PORT0_IDX 0u /*!< Port index */
#define PORT1_IDX 1u /*!< Port index */
#define PORT2_IDX 2u /*!< Port index */
#define PORT3_IDX 3u /*!< Port index */
struct lpc_i2c_bus
{
struct rt_i2c_bus_device parent;
I2C_Type *I2C;
};
static rt_ssize_t lpc_i2c_xfer(struct rt_i2c_bus_device *bus,
struct rt_i2c_msg msgs[], rt_uint32_t num)
{
struct rt_i2c_msg *msg;
i2c_master_transfer_t xfer = {0};
rt_uint32_t i;
rt_err_t ret = -RT_ERROR;
struct lpc_i2c_bus *lpc_i2c = (struct lpc_i2c_bus *)bus;
for (i = 0; i < num; i++)
{
msg = &msgs[i];
if (msg->flags & RT_I2C_RD)
{
xfer.slaveAddress = msg->addr;
xfer.direction = kI2C_Read;
xfer.subaddress = 1;
xfer.subaddressSize = 1;
xfer.data = msg->buf;
xfer.dataSize = msg->len;
xfer.flags = kI2C_TransferDefaultFlag;
if (I2C_MasterTransferBlocking(lpc_i2c->I2C, &xfer) != kStatus_Success)
{
i2c_dbg("i2c bus write failed,i2c bus stop!\n");
goto out;
}
}
else
{
xfer.slaveAddress = msg->addr;
xfer.direction = kI2C_Write;
xfer.subaddress = 0;
xfer.subaddressSize = 1;
xfer.data = msg->buf;
xfer.dataSize = msg->len;
xfer.flags = kI2C_TransferDefaultFlag;
if (I2C_MasterTransferBlocking(lpc_i2c->I2C, &xfer) != kStatus_Success)
{
i2c_dbg("i2c bus write failed,i2c bus stop!\n");
goto out;
}
}
}
ret = i;
out:
i2c_dbg("send stop condition\n");
return ret;
}
static const struct rt_i2c_bus_device_ops i2c_ops =
{
lpc_i2c_xfer,
RT_NULL,
RT_NULL
};
int rt_hw_i2c_init(void)
{
static struct lpc_i2c_bus lpc_i2c2;
/* attach 12 MHz clock to FLEXCOMM2 (I2C master for touch controller) */
CLOCK_AttachClk(kFRO12M_to_FLEXCOMM2);
const uint32_t port3_pin23_config = (
IOCON_PIO_FUNC1 | /* Pin is configured as FC2_CTS_SDA_SSEL0 */
IOCON_PIO_I2CSLEW_I2C | /* I2C mode */
IOCON_PIO_INV_DI | /* Input function is not inverted */
IOCON_PIO_DIGITAL_EN | /* Enables digital function */
IOCON_PIO_INPFILT_OFF | /* Input filter disabled */
IOCON_PIO_I2CDRIVE_HIGH | /* High drive: 20 mA */
IOCON_PIO_I2CFILTER_EN /* I2C 50 ns glitch filter enabled */
);
IOCON_PinMuxSet(IOCON, PORT3_IDX, PIN23_IDX, port3_pin23_config); /* PORT3 PIN23 (coords: C2) is configured as FC2_CTS_SDA_SSEL0 */
const uint32_t port3_pin24_config = (
IOCON_PIO_FUNC1 | /* Pin is configured as FC2_RTS_SCL_SSEL1 */
IOCON_PIO_I2CSLEW_I2C | /* I2C mode */
IOCON_PIO_INV_DI | /* Input function is not inverted */
IOCON_PIO_DIGITAL_EN | /* Enables digital function */
IOCON_PIO_INPFILT_OFF | /* Input filter disabled */
IOCON_PIO_I2CDRIVE_HIGH | /* High drive: 20 mA */
IOCON_PIO_I2CFILTER_EN /* I2C 50 ns glitch filter enabled */
);
IOCON_PinMuxSet(IOCON, PORT3_IDX, PIN24_IDX, port3_pin24_config); /* PORT3 PIN24 (coords: E2) is configured as FC2_RTS_SCL_SSEL1 */
{
i2c_master_config_t masterConfig;
I2C_MasterGetDefaultConfig(&masterConfig);
/* Change the default baudrate configuration */
masterConfig.baudRate_Bps = 100000U;
/* Initialize the I2C master peripheral */
I2C_MasterInit(I2C2, &masterConfig, 12000000);
}
rt_memset((void *)&lpc_i2c2, 0, sizeof(struct lpc_i2c_bus));
lpc_i2c2.parent.ops = &i2c_ops;
lpc_i2c2.I2C = I2C2;
rt_i2c_bus_device_register(&lpc_i2c2.parent, "i2c2");
return 0;
}
INIT_DEVICE_EXPORT(rt_hw_i2c_init);
#endif /* RT_USING_I2C */
|
