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
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
|
/*
ChibiOS - Copyright (C) 2006..2018 Giovanni Di Sirio
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
/**
* @file hal_uart.h
* @brief UART Driver macros and structures.
*
* @addtogroup UART
* @{
*/
#ifndef HAL_UART_H
#define HAL_UART_H
#if (HAL_USE_UART == TRUE) || defined(__DOXYGEN__)
/*===========================================================================*/
/* Driver constants. */
/*===========================================================================*/
/**
* @name UART status flags
* @{
*/
#define UART_NO_ERROR 0 /**< @brief No pending conditions. */
#define UART_PARITY_ERROR 4 /**< @brief Parity error happened. */
#define UART_FRAMING_ERROR 8 /**< @brief Framing error happened. */
#define UART_OVERRUN_ERROR 16 /**< @brief Overflow happened. */
#define UART_NOISE_ERROR 32 /**< @brief Noise on the line. */
#define UART_BREAK_DETECTED 64 /**< @brief Break detected. */
/** @} */
/*===========================================================================*/
/* Driver pre-compile time settings. */
/*===========================================================================*/
/**
* @name UART configuration options
* @{
*/
/**
* @brief Enables synchronous APIs.
* @note Disabling this option saves both code and data space.
*/
#if !defined(UART_USE_WAIT) || defined(__DOXYGEN__)
#define UART_USE_WAIT FALSE
#endif
/**
* @brief Enables the @p uartAcquireBus() and @p uartReleaseBus() APIs.
* @note Disabling this option saves both code and data space.
*/
#if !defined(UART_USE_MUTUAL_EXCLUSION) || defined(__DOXYGEN__)
#define UART_USE_MUTUAL_EXCLUSION FALSE
#endif
/** @} */
/*===========================================================================*/
/* Derived constants and error checks. */
/*===========================================================================*/
/*===========================================================================*/
/* Driver data structures and types. */
/*===========================================================================*/
/**
* @brief Driver state machine possible states.
*/
typedef enum {
UART_UNINIT = 0, /**< Not initialized. */
UART_STOP = 1, /**< Stopped. */
UART_READY = 2 /**< Ready. */
} uartstate_t;
/**
* @brief Transmitter state machine states.
*/
typedef enum {
UART_TX_IDLE = 0, /**< Not transmitting. */
UART_TX_ACTIVE = 1, /**< Transmitting. */
UART_TX_COMPLETE = 2 /**< Buffer complete. */
} uarttxstate_t;
/**
* @brief Receiver state machine states.
*/
typedef enum {
UART_RX_IDLE = 0, /**< Not receiving. */
UART_RX_ACTIVE = 1, /**< Receiving. */
UART_RX_COMPLETE = 2 /**< Buffer complete. */
} uartrxstate_t;
#include "hal_uart_lld.h"
/*===========================================================================*/
/* Driver macros. */
/*===========================================================================*/
/**
* @name Low level driver helper macros
* @{
*/
#if (UART_USE_WAIT == TRUE) || defined(__DOXYGEN__)
/**
* @brief Wakes up the waiting thread in case of early TX complete.
*
* @param[in] uartp pointer to the @p UARTDriver object
*
* @notapi
*/
#define _uart_wakeup_tx1_isr(uartp) { \
if ((uartp)->early == true) { \
osalSysLockFromISR(); \
osalThreadResumeI(&(uartp)->threadtx, MSG_OK); \
osalSysUnlockFromISR(); \
} \
}
#else /* !UART_USE_WAIT */
#define _uart_wakeup_tx1_isr(uartp)
#endif /* !UART_USE_WAIT */
#if (UART_USE_WAIT == TRUE) || defined(__DOXYGEN__)
/**
* @brief Wakes up the waiting thread in case of late TX complete.
*
* @param[in] uartp pointer to the @p UARTDriver object
*
* @notapi
*/
#define _uart_wakeup_tx2_isr(uartp) { \
if ((uartp)->early == false) { \
osalSysLockFromISR(); \
osalThreadResumeI(&(uartp)->threadtx, MSG_OK); \
osalSysUnlockFromISR(); \
} \
}
#else /* !UART_USE_WAIT */
#define _uart_wakeup_tx2_isr(uartp)
#endif /* !UART_USE_WAIT */
#if (UART_USE_WAIT == TRUE) || defined(__DOXYGEN__)
/**
* @brief Wakes up the waiting thread in case of RX complete.
*
* @param[in] uartp pointer to the @p UARTDriver object
*
* @notapi
*/
#define _uart_wakeup_rx_complete_isr(uartp) { \
osalSysLockFromISR(); \
osalThreadResumeI(&(uartp)->threadrx, MSG_OK); \
osalSysUnlockFromISR(); \
}
#else /* !UART_USE_WAIT */
#define _uart_wakeup_rx_complete_isr(uartp)
#endif /* !UART_USE_WAIT */
#if (UART_USE_WAIT == TRUE) || defined(__DOXYGEN__)
/**
* @brief Wakes up the waiting thread in case of RX error.
*
* @param[in] uartp pointer to the @p UARTDriver object
*
* @notapi
*/
#define _uart_wakeup_rx_error_isr(uartp) { \
osalSysLockFromISR(); \
osalThreadResumeI(&(uartp)->threadrx, MSG_RESET); \
osalSysUnlockFromISR(); \
}
#else /* !UART_USE_WAIT */
#define _uart_wakeup_rx_error_isr(uartp)
#endif /* !UART_USE_WAIT */
#if (UART_USE_WAIT == TRUE) || defined(__DOXYGEN__)
/**
* @brief Wakes up the waiting thread in case of RX timeout.
*
* @param[in] uartp pointer to the @p UARTDriver object
*
* @notapi
*/
#define _uart_wakeup_rx_timeout_isr(uartp) { \
osalSysLockFromISR(); \
osalThreadResumeI(&(uartp)->threadrx, MSG_TIMEOUT); \
osalSysUnlockFromISR(); \
}
#else /* !UART_USE_WAIT */
#define _uart_wakeup_rx_timeout_isr(uartp)
#endif /* !UART_USE_WAIT */
/**
* @brief Common ISR code for early TX.
* @details This code handles the portable part of the ISR code:
* - Callback invocation.
* - Waiting thread wakeup, if any.
* - Driver state transitions.
* .
* @note This macro is meant to be used in the low level drivers
* implementation only.
*
* @param[in] uartp pointer to the @p UARTDriver object
*
* @notapi
*/
#define _uart_tx1_isr_code(uartp) { \
(uartp)->txstate = UART_TX_COMPLETE; \
if ((uartp)->config->txend1_cb != NULL) { \
(uartp)->config->txend1_cb(uartp); \
} \
if ((uartp)->txstate == UART_TX_COMPLETE) { \
(uartp)->txstate = UART_TX_IDLE; \
} \
_uart_wakeup_tx1_isr(uartp); \
}
/**
* @brief Common ISR code for late TX.
* @details This code handles the portable part of the ISR code:
* - Callback invocation.
* - Waiting thread wakeup, if any.
* - Driver state transitions.
* .
* @note This macro is meant to be used in the low level drivers
* implementation only.
*
* @param[in] uartp pointer to the @p UARTDriver object
*
* @notapi
*/
#define _uart_tx2_isr_code(uartp) { \
if ((uartp)->config->txend2_cb != NULL) { \
(uartp)->config->txend2_cb(uartp); \
} \
_uart_wakeup_tx2_isr(uartp); \
}
/**
* @brief Common ISR code for RX complete.
* @details This code handles the portable part of the ISR code:
* - Callback invocation.
* - Waiting thread wakeup, if any.
* - Driver state transitions.
* .
* @note This macro is meant to be used in the low level drivers
* implementation only.
*
* @param[in] uartp pointer to the @p UARTDriver object
*
* @notapi
*/
#define _uart_rx_complete_isr_code(uartp) { \
(uartp)->rxstate = UART_RX_COMPLETE; \
if ((uartp)->config->rxend_cb != NULL) { \
(uartp)->config->rxend_cb(uartp); \
} \
if ((uartp)->rxstate == UART_RX_COMPLETE) { \
(uartp)->rxstate = UART_RX_IDLE; \
uart_enter_rx_idle_loop(uartp); \
} \
_uart_wakeup_rx_complete_isr(uartp); \
}
/**
* @brief Common ISR code for RX error.
* @details This code handles the portable part of the ISR code:
* - Callback invocation.
* - Waiting thread wakeup, if any.
* - Driver state transitions.
* .
* @note This macro is meant to be used in the low level drivers
* implementation only.
*
* @param[in] uartp pointer to the @p UARTDriver object
* @param[in] errors mask of errors to be reported
*
* @notapi
*/
#define _uart_rx_error_isr_code(uartp, errors) { \
if ((uartp)->config->rxerr_cb != NULL) { \
(uartp)->config->rxerr_cb(uartp, errors); \
} \
_uart_wakeup_rx_error_isr(uartp); \
}
/**
* @brief Common ISR code for RX on idle.
* @details This code handles the portable part of the ISR code:
* - Callback invocation.
* - Waiting thread wakeup, if any.
* - Driver state transitions.
* .
* @note This macro is meant to be used in the low level drivers
* implementation only.
*
* @param[in] uartp pointer to the @p UARTDriver object
*
* @notapi
*/
#define _uart_rx_idle_code(uartp) { \
if ((uartp)->config->rxchar_cb != NULL) \
(uartp)->config->rxchar_cb(uartp, (uartp)->rxbuf); \
}
/**
* @brief Timeout ISR code for receiver.
* @details This code handles the portable part of the ISR code:
* - Callback invocation.
* - Waiting thread wakeup, if any.
* - Driver state transitions.
* .
* @note This macro is meant to be used in the low level drivers
* implementation only.
*
* @param[in] uartp pointer to the @p UARTDriver object
*
* @notapi
*/
#define _uart_timeout_isr_code(uartp) { \
if ((uartp)->config->timeout_cb != NULL) { \
(uartp)->config->timeout_cb(uartp); \
} \
_uart_wakeup_rx_timeout_isr(uartp); \
}
/** @} */
/*===========================================================================*/
/* External declarations. */
/*===========================================================================*/
#ifdef __cplusplus
extern "C" {
#endif
void uartInit(void);
void uartObjectInit(UARTDriver *uartp);
void uartStart(UARTDriver *uartp, const UARTConfig *config);
void uartStop(UARTDriver *uartp);
void uartStartSend(UARTDriver *uartp, size_t n, const void *txbuf);
void uartStartSendI(UARTDriver *uartp, size_t n, const void *txbuf);
size_t uartStopSend(UARTDriver *uartp);
size_t uartStopSendI(UARTDriver *uartp);
void uartStartReceive(UARTDriver *uartp, size_t n, void *rxbuf);
void uartStartReceiveI(UARTDriver *uartp, size_t n, void *rxbuf);
size_t uartStopReceive(UARTDriver *uartp);
size_t uartStopReceiveI(UARTDriver *uartp);
#if UART_USE_WAIT == TRUE
msg_t uartSendTimeout(UARTDriver *uartp, size_t *np,
const void *txbuf, sysinterval_t timeout);
msg_t uartSendFullTimeout(UARTDriver *uartp, size_t *np,
const void *txbuf, sysinterval_t timeout);
msg_t uartReceiveTimeout(UARTDriver *uartp, size_t *np,
void *rxbuf, sysinterval_t timeout);
#endif
#if UART_USE_MUTUAL_EXCLUSION == TRUE
void uartAcquireBus(UARTDriver *uartp);
void uartReleaseBus(UARTDriver *uartp);
#endif
#ifdef __cplusplus
}
#endif
#endif /* HAL_USE_UART == TRUE */
#endif /* HAL_UART_H */
/** @} */
|
