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
|
/*
ChibiOS/RT - Copyright (C) 2006,2007,2008,2009,2010 Giovanni Di Sirio.
This file is part of ChibiOS/RT.
ChibiOS/RT 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 3 of the License, or
(at your option) any later version.
ChibiOS/RT 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, see <http://www.gnu.org/licenses/>.
*/
/**
* @file STM8L/serial_lld.h
* @brief STM8L low level serial driver header.
*
* @addtogroup SERIAL
* @{
*/
#ifndef _SERIAL_LLD_H_
#define _SERIAL_LLD_H_
#if HAL_USE_SERIAL || defined(__DOXYGEN__)
/*===========================================================================*/
/* Driver constants. */
/*===========================================================================*/
#define SD_MODE_PARITY 0x07 /**< @brief Parity field mask. */
#define SD_MODE_PARITY_NONE 0x00 /**< @brief No parity. */
#define SD_MODE_PARITY_EVEN 0x05 /**< @brief Even parity. */
#define SD_MODE_PARITY_ODD 0x07 /**< @brief Odd parity. */
#define SD_MODE_STOP 0x30 /**< @brief Stop bits mask. */
#define SD_MODE_STOP_1 0x00 /**< @brief One stop bit. */
#define SD_MODE_STOP_2 0x20 /**< @brief Two stop bits. */
#define SD_MODE_STOP_1P5 0x30 /**< @brief 1.5 stop bits. */
/*===========================================================================*/
/* Driver pre-compile time settings. */
/*===========================================================================*/
/**
* @brief USART1 driver enable switch.
* @details If set to @p TRUE the support for USART1 is included.
* @note The default is @p TRUE.
*/
#if !defined(STM8L_SERIAL_USE_USART1) || defined(__DOXYGEN__)
#define STM8L_SERIAL_USE_USART1 TRUE
#endif
/**
* @brief USART2 driver enable switch.
* @details If set to @p TRUE the support for USART3 is included.
* @note The default is @p TRUE.
*/
#if !defined(STM8L_SERIAL_USE_USART2) || defined(__DOXYGEN__)
#define STM8L_SERIAL_USE_USART2 TRUE
#endif
/**
* @brief USART3 driver enable switch.
* @details If set to @p TRUE the support for USART3 is included.
* @note The default is @p TRUE.
*/
#if !defined(STM8L_SERIAL_USE_USART3) || defined(__DOXYGEN__)
#define STM8L_SERIAL_USE_USART3 TRUE
#endif
/*===========================================================================*/
/* Derived constants and error checks. */
/*===========================================================================*/
#if STM8L_SERIAL_USE_USART1 && !STM8L_HAS_USART1
#error "USART1 not present in the selected device"
#endif
#if STM8L_SERIAL_USE_USART2 && !STM8L_HAS_USART2
#error "USART2 not present in the selected device"
#endif
#if STM8L_SERIAL_USE_USART3 && !STM8L_HAS_USART3
#error "USART3 not present in the selected device"
#endif
/*===========================================================================*/
/* Driver data structures and types. */
/*===========================================================================*/
/**
* @brief Generic Serial Driver configuration structure.
* @details An instance of this structure must be passed to @p sdStart()
* in order to configure and start a serial driver operations.
* @note This structure content is architecture dependent, each driver
* implementation defines its own version and the custom static
* initializers.
*/
typedef struct {
/**
* @brief Bit rate register.
*/
uint16_t sc_brr;
/**
* @brief Mode flags.
*/
uint8_t sc_mode;
} SerialConfig;
/**
* @brief @p SerialDriver specific data.
*/
#define _serial_driver_data \
_base_asynchronous_channel_data \
/* Driver state.*/ \
sdstate_t state; \
/* Input queue.*/ \
InputQueue iqueue; \
/* Output queue.*/ \
OutputQueue oqueue; \
/* Input circular buffer.*/ \
uint8_t ib[SERIAL_BUFFERS_SIZE]; \
/* Output circular buffer.*/ \
uint8_t ob[SERIAL_BUFFERS_SIZE]; \
/* End of the mandatory fields.*/ \
USART_TypeDef *usart;
/*===========================================================================*/
/* Driver macros. */
/*===========================================================================*/
/**
* @brief Macro for baud rate computation.
* @note Make sure the final baud rate is within tolerance.
*/
#define BRR(b) (SYSCLK / (b))
#if STM8L_SERIAL_USE_USART1 || defined(__DOXYGEN__)
/**
* @brief USART1 RX interrupt handler segment.
*/
#define _USART1_RECEIVE_ISR() { \
uint8_t sr = USART1->SR; \
if (sr & (USART_SR_RXNE | USART_SR_OR | USART_SR_NF | \
USART_SR_FE | USART_SR_PE)) { \
if (sr & (USART_SR_OR | USART_SR_NF | USART_SR_FE | USART_SR_PE)) \
sd_lld_set_error(&SD1, sr); \
chSysLockFromIsr(); \
sdIncomingDataI(&SD1, USART1->DR); \
chSysUnlockFromIsr(); \
} \
}
/**
* @brief USART1 TX interrupt handler segment.
*/
#define _USART1_TRANSMIT_ISR() { \
if (USART1->SR & USART_SR_TXE) { \
msg_t b; \
chSysLockFromIsr(); \
b = sdRequestDataI(&SD1); \
chSysUnlockFromIsr(); \
if (b < Q_OK) \
USART1->CR2 &= (uint8_t)~USART_CR2_TIEN; \
else \
USART1->DR = (uint8_t)b; \
} \
}
#endif /* STM8L_SERIAL_USE_USART1 */
#if STM8L_SERIAL_USE_USART2 || defined(__DOXYGEN__)
/**
* @brief USART2 RX interrupt handler segment.
*/
#define _USART2_RECEIVE_ISR() { \
uint8_t sr = USART2->SR; \
if (sr & (USART_SR_RXNE | USART_SR_OR | USART_SR_NF | \
USART_SR_FE | USART_SR_PE)) { \
if (sr & (USART_SR_OR | USART_SR_NF | USART_SR_FE | USART_SR_PE)) \
sd_lld_set_error(&SD2, sr); \
chSysLockFromIsr(); \
sdIncomingDataI(&SD2, USART2->DR); \
chSysUnlockFromIsr(); \
} \
}
/**
* @brief USART2 TX interrupt handler segment.
*/
#define _USART2_TRANSMIT_ISR() { \
if (USART2->SR & USART_SR_TXE) { \
msg_t b; \
chSysLockFromIsr(); \
b = sdRequestDataI(&SD2); \
chSysUnlockFromIsr(); \
if (b < Q_OK) \
USART2->CR2 &= (uint8_t)~USART_CR2_TIEN; \
else \
USART2->DR = (uint8_t)b; \
} \
}
#endif /* STM8L_SERIAL_USE_USART2 */
#if STM8L_SERIAL_USE_USART3 || defined(__DOXYGEN__)
/**
* @brief USART3 RX interrupt handler segment.
*/
#define _USART3_RECEIVE_ISR() { \
uint8_t sr = USART3->SR; \
if (sr & (USART_SR_RXNE | USART_SR_OR | USART_SR_NF | \
USART_SR_FE | USART_SR_PE)) { \
if (sr & (USART_SR_OR | USART_SR_NF | USART_SR_FE | USART_SR_PE)) \
sd_lld_set_error(&SD3, sr); \
chSysLockFromIsr(); \
sdIncomingDataI(&SD3, USART3->DR); \
chSysUnlockFromIsr(); \
} \
}
/**
* @brief USART3 TX interrupt handler segment.
*/
#define _USART3_TRANSMIT_ISR() { \
if (USART3->SR & USART_SR_TXE) { \
msg_t b; \
chSysLockFromIsr(); \
b = sdRequestDataI(&SD3); \
chSysUnlockFromIsr(); \
if (b < Q_OK) \
USART3->CR2 &= (uint8_t)~USART_CR2_TIEN; \
else \
USART3->DR = (uint8_t)b; \
} \
}
#endif /* STM8L_SERIAL_USE_USART3 */
/*===========================================================================*/
/* External declarations. */
/*===========================================================================*/
#if STM8L_SERIAL_USE_USART1 && !defined(__DOXYGEN__)
extern SerialDriver SD1;
#endif
#if STM8L_SERIAL_USE_USART2 && !defined(__DOXYGEN__)
extern SerialDriver SD2;
#endif
#if STM8L_SERIAL_USE_USART3 && !defined(__DOXYGEN__)
extern SerialDriver SD3;
#endif
#ifdef __cplusplus
extern "C" {
#endif
void sd_lld_init(void);
void sd_lld_start(SerialDriver *sdp, const SerialConfig *config);
void sd_lld_stop(SerialDriver *sdp);
void sd_lld_set_error(SerialDriver *sdp, uint8_t sr);
#ifdef __cplusplus
}
#endif
#endif /* HAL_USE_SERIAL */
#endif /* _SERIAL_LLD_H_ */
/** @} */
|
