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
|
/*
* COPYRIGHT (C) 2018, Real-Thread Information Technology Ltd
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2013-03-30 Bernard the first verion
*/
#include <rthw.h>
#include <registers/regsuart.h>
#include <imx_uart.h>
#include <rtdevice.h>
#include "serial.h"
struct hw_uart_device
{
uint32_t instance;
int irqno;
};
static void rt_hw_uart_isr(int irqno, void *param)
{
struct rt_serial_device *serial = (struct rt_serial_device *)param;
rt_hw_serial_isr(serial, RT_SERIAL_EVENT_RX_IND);
}
static rt_err_t uart_configure(struct rt_serial_device *serial, struct serial_configure *cfg)
{
struct hw_uart_device *uart;
uint32_t baudrate;
uint8_t parity, stopbits, datasize, flowcontrol;
RT_ASSERT(serial != RT_NULL);
uart = (struct hw_uart_device *)serial->parent.user_data;
baudrate = cfg->baud_rate;
switch (cfg->data_bits)
{
case DATA_BITS_8:
datasize = EIGHTBITS;
break;
case DATA_BITS_7:
datasize = SEVENBITS;
break;
}
if (cfg->stop_bits == STOP_BITS_1) stopbits = STOPBITS_ONE;
else if (cfg->stop_bits == STOP_BITS_2) stopbits = STOPBITS_TWO;
parity = PARITY_NONE;
flowcontrol = FLOWCTRL_OFF;
/* Initialize UART */
uart_init(uart->instance, baudrate, parity, stopbits, datasize, flowcontrol);
rt_hw_interrupt_install(uart->irqno, rt_hw_uart_isr, serial, "uart");
rt_hw_interrupt_mask(uart->irqno);
/* Set the IRQ mode for the Rx FIFO */
uart_set_FIFO_mode(uart->instance, RX_FIFO, 1, IRQ_MODE);
return RT_EOK;
}
static rt_err_t uart_control(struct rt_serial_device *serial, int cmd, void *arg)
{
struct hw_uart_device *uart;
RT_ASSERT(serial != RT_NULL);
uart = (struct hw_uart_device *)serial->parent.user_data;
switch (cmd)
{
case RT_DEVICE_CTRL_CLR_INT:
/* disable rx irq */
rt_hw_interrupt_mask(uart->irqno);
break;
case RT_DEVICE_CTRL_SET_INT:
/* enable rx irq */
rt_hw_interrupt_umask(uart->irqno);
break;
}
return RT_EOK;
}
static int uart_putc(struct rt_serial_device *serial, char c)
{
struct hw_uart_device *uart;
RT_ASSERT(serial != RT_NULL);
uart = (struct hw_uart_device *)serial->parent.user_data;
uart_putchar(uart->instance, (uint8_t*)&c);
return 1;
}
static int uart_getc(struct rt_serial_device *serial)
{
int ch;
struct hw_uart_device *uart;
RT_ASSERT(serial != RT_NULL);
uart = (struct hw_uart_device *)serial->parent.user_data;
ch = uart_getchar(uart->instance);
if (ch == NONE_CHAR) ch = -1;
return ch;
}
static const struct rt_uart_ops _uart_ops =
{
uart_configure,
uart_control,
uart_putc,
uart_getc,
};
#ifdef RT_USING_UART1
/* UART1 device driver structure */
static struct hw_uart_device _uart1_device =
{
HW_UART1,
IMX_INT_UART1
};
static struct rt_serial_device _serial1;
#endif
int rt_hw_uart_init(void)
{
struct hw_uart_device *uart;
struct serial_configure config;
config.baud_rate = BAUD_RATE_115200;
config.bit_order = BIT_ORDER_LSB;
config.data_bits = DATA_BITS_8;
config.parity = PARITY_NONE;
config.stop_bits = STOP_BITS_1;
config.invert = NRZ_NORMAL;
config.bufsz = RT_SERIAL_RB_BUFSZ;
#ifdef RT_USING_UART1
uart = &_uart1_device;
_serial1.ops = &_uart_ops;
_serial1.config = config;
/* register UART1 device */
rt_hw_serial_register(&_serial1, "uart1",
RT_DEVICE_FLAG_RDWR | RT_DEVICE_FLAG_INT_RX, uart);
#endif
return 0;
}
INIT_BOARD_EXPORT(rt_hw_uart_init);
|
