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
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
|
/*
* This file is part of FH8620 BSP for RT-Thread distribution.
*
* Copyright (c) 2016 Shanghai Fullhan Microelectronics Co., Ltd.
* All rights reserved
*
* 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.
*
* Visit http://www.fullhan.com to get contact with Fullhan.
*
* Change Logs:
* Date Author Notes
*/
/*****************************************************************************
* Include Section
* add all #include here
*****************************************************************************/
#include "inc/fh_driverlib.h"
/*****************************************************************************
* Define section
* add all #define here
*****************************************************************************/
/****************************************************************************
* ADT section
* add definition of user defined Data Type that only be used in this file here
***************************************************************************/
/******************************************************************************
* Function prototype section
* add prototypes for all functions called by this file,execepting those
* declared in header file
*****************************************************************************/
/*****************************************************************************
* Global variables section - Exported
* add declaration of global variables that will be exported here
* e.g.
* int8_t foo;
****************************************************************************/
/*****************************************************************************
* Global variables section - Local
* define global variables(will be refered only in this file) here,
* static keyword should be used to limit scope of local variable to this file
* e.g.
* static uint8_t ufoo;
*****************************************************************************/
/* function body */
/*****************************************************************************
* Description:
* add funtion description here
* Parameters:
* description for each argument, new argument starts at new line
* Return:
* what does this function returned?
*****************************************************************************/
int uart_init(uart *port)
{
port->UART_IER = 0;
port->UART_LCR = 0;
//port->UART_DLL = 0;
//port->UART_DLH = 0;
}
UINT32 uart_get_status(uart *port)
{
return port->UART_USR;
}
void uart_configure(uart *port, enum data_bits data_bit,
enum stop_bits stop_bit, enum parity parity,
UINT32 buard_rate, UINT32 uart_clk)
{
UINT32 divisor;
UINT32 freq;
UINT32 baud_div;
UINT32 lcr_reg = 0;
UINT32 ret;
/*divisor = DIV(buard_rate);
port->UART_LCR |= UART_LCR_DLAB;
port->UART_DLL = divisor & 0xFF;
port->UART_DLH = (divisor >> 8) & 0xFF;
port->UART_LCR &= ~UART_LCR_DLAB;*/
do{
//clear fifo...
port->UART_FCR = UART_FCR_RFIFOR | UART_FCR_XFIFOR;
//read status..
ret = uart_get_status(port);
}while(ret & UART_USR_BUSY);
switch (data_bit) {
case UART_DATA_BIT5:
lcr_reg |= UART_LCR_DLS5;
break;
case UART_DATA_BIT6:
lcr_reg |= UART_LCR_DLS6;
break;
case UART_DATA_BIT7:
lcr_reg |= UART_LCR_DLS7;
break;
case UART_DATA_BIT8:
lcr_reg |= UART_LCR_DLS8;
break;
default:
lcr_reg |= UART_LCR_DLS8;
break;
}
switch (stop_bit) {
case UART_STOP_BIT1:
lcr_reg |= UART_LCR_STOP1;
break;
case UART_STOP_BIT2:
lcr_reg |= UART_LCR_STOP2;
break;
default:
lcr_reg |= UART_LCR_STOP1;
break;
}
switch (parity) {
case UART_PARITY_EVEN:
lcr_reg |= UART_LCR_EVEN | UART_LCR_PEN;
break;
case UART_PARITY_ODD:
lcr_reg |= UART_LCR_PEN;
break;
case UART_PARITY_ST:
lcr_reg |= UART_LCR_SP;
break;
case UART_PARITY_NONE:
default:
break;
}
switch (buard_rate) {
case 115200:
baud_div = BAUDRATE_115200;
break;
case 57600:
baud_div = BAUDRATE_57600;
break;
case 38400:
baud_div = BAUDRATE_38400;
break;
case 19200:
baud_div = BAUDRATE_19200;
break;
case 9600:
baud_div = BAUDRATE_9600;
break;
default:
baud_div = BAUDRATE_115200;
break;
}
//clear fifo
port->UART_FCR = UART_FCR_RFIFOR | UART_FCR_XFIFOR;
//div
ret = port->UART_LCR;
ret |= UART_LCR_DLAB;
port->UART_LCR = ret;
port->RBRTHRDLL = baud_div & 0x00ff;
port->DLHIER = (baud_div & 0x00ff)>>8;
/* clear DLAB */
ret = ret & 0x7f;
port->UART_LCR = ret;
//line control
port->UART_LCR = lcr_reg;
//fifo control
port->UART_FCR = UART_FCR_FIFOE | UART_FCR_RFIFOR | UART_FCR_XFIFOR | UART_FCR_TET_1_4 | UART_FCR_RT_ONE;
}
int uart_enable_irq(uart *port, UINT32 mode)
{
unsigned int ret;
ret = port->UART_IER;
ret |= mode;
port->UART_IER = ret;
}
int uart_disable_irq(uart *port, UINT32 mode)
{
unsigned int ret;
ret = port->UART_IER;
ret &= ~mode;
port->UART_IER = ret;
}
UINT32 uart_get_iir_status(uart *port)
{
return port->UART_IIR;
}
UINT32 uart_get_line_status(uart *port)
{
return port->UART_LSR;
}
UINT32 uart_is_rx_ready(uart *port)
{
return port->UART_LSR & UART_LSR_DR;
}
UINT8 uart_getc(uart *port)
{
return port->UART_RBR & 0xFF;
}
void uart_putc(uart *port, UINT8 c)
{
//while(!(port->UART_USR & UART_USR_TFNF));
port->UART_THR = c;
}
void uart_set_fifo_mode(uart *port, UINT32 fifo_mode)
{
port->UART_FCR = fifo_mode;
}
|
