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
|
/*
* Copyright (c) 2006-2025, RT-Thread Development Team
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2025-04-27 WangShun the first version
*/
#include "board.h"
#include "rtthread.h"
#include <rtdevice.h>
#include <string.h>
#include <drv_usart.h>
#ifdef RT_USING_SERIAL
#define DRV_DEBUG
#define LOG_TAG "drv.uart"
#ifdef DRV_DEBUG
#define DBG_LVL DBG_LOG
#else
#define DBG_LVL DBG_INFO
#endif /* DRV_DEBUG */
#include <rtdbg.h>
#if !defined(BSP_USING_UART0) && !defined(BSP_USING_UART1) && !defined(BSP_USING_UART2) && !defined(BSP_USING_UART3) \
&& !defined(BSP_USING_UART4) && !defined(BSP_USING_UART5) && !defined(BSP_USING_UART6) && !defined(BSP_USING_UART7)
#error "Please define at least one BSP_USING_UARTx"
/* this driver can be disabled at menuconfig -> RT-Thread Components -> Device Drivers */
#endif
static void xuantie_uart0_rx_isr(csi_uart_t *uart_handler, csi_uart_event_t event, void *arg);
enum
{
#ifdef BSP_USING_UART0
UART0_INDEX,
#endif
};
struct xuantie_uart_config uart_config[] =
{
#ifdef BSP_USING_UART0
{
"uart0",
0,
xuantie_uart0_rx_isr
}
#endif
};
struct xuantie_uart uart_obj[sizeof(uart_config) / sizeof(uart_config[0])] = {0};
static rt_err_t xuantie_configure(struct rt_serial_device *serial, struct serial_configure *cfg)
{
struct xuantie_uart *uart = (struct xuantie_uart *)serial->parent.user_data;
csi_error_t ret;
ret = csi_uart_baud(&uart->uart, cfg->baud_rate);
if (ret != CSI_OK)
{
return -RT_ERROR;
}
csi_uart_data_bits_t data_bits;
csi_uart_parity_t parity;
csi_uart_stop_bits_t stop_bits;
switch (cfg->data_bits)
{
case DATA_BITS_5:
data_bits = UART_DATA_BITS_5;
break;
case DATA_BITS_6:
data_bits = UART_DATA_BITS_6;
break;
case DATA_BITS_7:
data_bits = UART_DATA_BITS_7;
break;
case DATA_BITS_8:
data_bits = UART_DATA_BITS_8;
break;
case DATA_BITS_9:
data_bits = UART_DATA_BITS_9;
break;
default:
data_bits = UART_DATA_BITS_8;
break;
}
switch (cfg->parity)
{
case PARITY_NONE:
parity = UART_PARITY_NONE;
break;
case PARITY_ODD:
parity = UART_PARITY_ODD;
break;
case PARITY_EVEN:
parity = UART_PARITY_EVEN;
break;
default:
parity = UART_PARITY_NONE;
break;
}
switch (cfg->stop_bits)
{
case STOP_BITS_1:
stop_bits = UART_STOP_BITS_1;
break;
case STOP_BITS_2:
stop_bits = UART_STOP_BITS_2;
break;
default:
stop_bits = UART_STOP_BITS_1;
break;
}
ret = csi_uart_format(&uart->uart, data_bits, parity, stop_bits);
if (ret != CSI_OK)
{
return -RT_ERROR;
}
return RT_EOK;
}
static rt_err_t xuantie_control(struct rt_serial_device *serial, int cmd, void *arg)
{
switch (cmd)
{
case RT_DEVICE_CTRL_CONFIG:
return xuantie_configure(serial, (struct serial_configure *)arg);
default:
return -RT_ERROR;
}
}
static int xuantie_putc(struct rt_serial_device *serial, char c)
{
struct xuantie_uart *uart = (struct xuantie_uart *)serial->parent.user_data;
int32_t ret;
ret = csi_uart_send(&uart->uart, &c, 1, 50);
if (ret == 1)
return RT_EOK;
return -RT_ERROR;
}
static int xuantie_getc(struct rt_serial_device *serial)
{
int c = -1;
struct xuantie_uart *uart = (struct xuantie_uart *)serial->parent.user_data;
dw_uart_regs_t *uart_base = (dw_uart_regs_t *)HANDLE_REG_BASE((&uart->uart));
csi_uart_receive(&uart->uart, &c, 1, 0x5);
dw_uart_enable_recv_irq(uart_base);
return c;
}
static const struct rt_uart_ops xuantie_uart_ops =
{
xuantie_configure,
xuantie_control,
xuantie_putc,
xuantie_getc,
RT_NULL,
};
static void xuantie_uart0_rx_isr(csi_uart_t *uart_handler, csi_uart_event_t event, void *arg)
{
rt_interrupt_enter();
rt_hw_serial_isr(&uart_obj[UART0_INDEX].serial, RT_SERIAL_EVENT_RX_IND);
rt_interrupt_leave();
}
int rt_hw_usart_init(void)
{
rt_size_t obj_num = sizeof(uart_obj) / sizeof(struct xuantie_uart);
struct serial_configure config = RT_SERIAL_CONFIG_DEFAULT;
rt_err_t result = 0;
for (int i = 0; i < obj_num; i++)
{
/* Initialize YOC UART */
result = csi_uart_init(&uart_obj[i].uart, 0);
if (result != CSI_OK)
{
LOG_E("Failed to initialize UART %d", uart_obj[i].config->idx);
return -RT_ERROR;
}
/* Init UART object */
uart_obj[i].config = &uart_config[i];
uart_obj[i].serial.ops = &xuantie_uart_ops;
uart_obj[i].serial.config = config;
csi_uart_attach_callback(&uart_obj[i].uart, uart_obj[i].config->xuantie_uart_rx_isr, NULL);
/* Register UART device */
result = rt_hw_serial_register(&uart_obj[i].serial, uart_obj[i].config->name,
RT_DEVICE_FLAG_RDWR | RT_DEVICE_FLAG_INT_RX,
&uart_obj[i]);
if (result != RT_EOK)
{
LOG_E("Failed to register UART device %s", uart_obj[i].config->name);
csi_uart_uninit(&uart_obj[i].uart);
return -RT_ERROR;
}
}
return result;
}
#endif /* RT_USING_SERIAL */
|
