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
|
/*
ChibiOS/RT - Copyright (C) 2006-2013 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 AT91SAM7/gpt_lld.h
* @brief AT91SAM7 GPT subsystem low level driver header.
*
* @addtogroup GPT
* @{
*/
#ifndef _GPT_LLD_H_
#define _GPT_LLD_H_
#if HAL_USE_GPT || defined(__DOXYGEN__)
/*===========================================================================*/
/* Driver constants. */
/*===========================================================================*/
/*===========================================================================*/
/* Driver pre-compile time settings. */
/*===========================================================================*/
/**
* @name Configuration options
* @{
*/
/**
* @brief GPTD1 driver enable switch.
* @details If set to @p TRUE the support for GPTD1 is included.
* @note The default is @p TRUE.
*/
#if !defined(AT91_GPT_USE_TC0) || defined(__DOXYGEN__)
#define AT91_GPT_USE_TC0 FALSE
#endif
/**
* @brief GPTD2 driver enable switch.
* @details If set to @p TRUE the support for GPTD2 is included.
* @note The default is @p TRUE.
*/
#if !defined(AT91_GPT_USE_TC1) || defined(__DOXYGEN__)
#define AT91_GPT_USE_TC1 FALSE
#endif
/**
* @brief GPTD3 driver enable switch.
* @details If set to @p TRUE the support for GPTD3 is included.
* @note The default is @p TRUE.
*/
#if !defined(AT91_GPT_USE_TC2) || defined(__DOXYGEN__)
#define AT91_GPT_USE_TC3 FALSE
#endif
/**
* @brief GPTD1 interrupt priority level setting.
*/
#if !defined(AT91_GPT_TC0_IRQ_PRIORITY) || defined(__DOXYGEN__)
#define AT91_GPT_TC0_IRQ_PRIORITY (AT91C_AIC_PRIOR_HIGHEST - 2)
#endif
/**
* @brief GPTD2 interrupt priority level setting.
*/
#if !defined(AT91_GPT_TC1_IRQ_PRIORITY) || defined(__DOXYGEN__)
#define AT91_GPT_TC1_IRQ_PRIORITY (AT91C_AIC_PRIOR_HIGHEST - 2)
#endif
/**
* @brief GPTD3 interrupt priority level setting.
*/
#if !defined(AT91_GPT_TC2_IRQ_PRIORITY) || defined(__DOXYGEN__)
#define AT91_GPT_TC2_IRQ_PRIORITY (AT91C_AIC_PRIOR_HIGHEST - 2)
#endif
/** @} */
/*===========================================================================*/
/* Derived constants and error checks. */
/*===========================================================================*/
#if !AT91_GPT_USE_TC0 && !AT91_GPT_USE_TC1 && !AT91_GPT_USE_TC2
#error "GPT driver activated but no TC peripheral assigned"
#endif
/*===========================================================================*/
/* Driver data structures and types. */
/*===========================================================================*/
/**
* @brief GPT frequency type.
*/
typedef uint32_t gptfreq_t;
/**
* @brief GPT counter type.
*/
typedef uint16_t gptcnt_t;
/**
* @brief Driver configuration structure.
* @note It could be empty on some architectures.
*/
typedef struct {
/**
* @brief Timer clock in Hz.
* @note The low level can use assertions in order to catch invalid
* frequency specifications.
*/
gptfreq_t frequency;
/**
* @brief Timer callback pointer.
* @note This callback is invoked on GPT counter events.
*/
gptcallback_t callback;
/* End of the mandatory fields.*/
/**
* @brief Timer Clock Source.
*/
uint8_t clocksource;
#define GPT_CLOCK_MCLK 0 // @< Internal clock. frequency must = MCLK/2, MCLK/8, MCLK/32, MCLK/128 or MCLK/1024
#define GPT_CLOCK_FREQUENCY 1 // @< Internal clock. interval is ignored. frequency determines rate
#define GPT_CLOCK_RE_TCLK0 2 // @< External TCLK0. Rising Edge
#define GPT_CLOCK_FE_TCLK0 3 // @< External TCLK0. Falling Edge
#define GPT_CLOCK_RE_TCLK1 4 // @< External TCLK1. Rising Edge
#define GPT_CLOCK_FE_TCLK1 5 // @< External TCLK1. Falling Edge
#define GPT_CLOCK_RE_TCLK2 6 // @< External TCLK2. Rising Edge
#define GPT_CLOCK_FE_TCLK2 7 // @< External TCLK2. Falling Edge
#define GPT_CLOCK_RE_TC0 8 // @< TC0 output. Rising Edge. Do not use on TC0
#define GPT_CLOCK_FE_TC0 9 // @< TC0 output. Falling Edge. Do not use on TC0
#define GPT_CLOCK_RE_TC1 10 // @< TC1 output. Rising Edge. Do not use on TC1
#define GPT_CLOCK_FE_TC1 11 // @< TC1 output. Falling Edge. Do not use on TC1
#define GPT_CLOCK_RE_TC2 12 // @< TC2 output. Rising Edge. Do not use on TC2
#define GPT_CLOCK_FE_TC2 13 // @< TC2 output. Falling Edge. Do not use on TC2
uint8_t clockgate;
#define GPT_GATE_NONE 0 // @< Clock gating off
#define GPT_GATE_TCLK0 1 // @< Clock on TCLK0 active high signal. If using this on TC0 with GPT_CLOCK_xx_TIMx, the TIMx output will be used instead.
#define GPT_GATE_TCLK1 2 // @< Clock on TCLK1 active high signal. If using this on TC1 with GPT_CLOCK_xx_TIMx, the TIMx output will be used instead.
#define GPT_GATE_TCLK2 3 // @< Clock on TCLK2 active high signal. If using this on TC2 with GPT_CLOCK_xx_TIMx, the TIMx output will be used instead.
uint8_t trigger;
#define GPT_TRIGGER_NONE 0x00 // @< Start immediately
#define GPT_TRIGGER_RE_TIOB 0x10 // @< Start on TIOB signal. Rising Edge.
#define GPT_TRIGGER_FE_TIOB 0x20 // @< Start on TIOB signal. Falling Edge.
#define GPT_TRIGGER_BE_TIOB 0x30 // @< Start on TIOB signal. Both Edges.
#define GPT_TRIGGER_RE_TCLK0 0x11 // @< Start on TCLK0 signal. Rising Edge. If using this on TC0 with GPT_CLOCK_xx_TIMx, the TIMx output will be used instead.
#define GPT_TRIGGER_FE_TCLK0 0x21 // @< Start on TCLK0 signal. Falling Edge. If using this on TC0 with GPT_CLOCK_xx_TIMx, the TIMx output will be used instead.
#define GPT_TRIGGER_BE_TCLK0 0x31 // @< Start on TCLK0 signal. Both Edges. If using this on TC0 with GPT_CLOCK_xx_TIMx, the TIMx output will be used instead.
#define GPT_TRIGGER_RE_TCLK1 0x12 // @< Start on TCLK1 signal. Rising Edge. If using this on TC1 with GPT_CLOCK_xx_TIMx, the TIMx output will be used instead.
#define GPT_TRIGGER_FE_TCLK1 0x22 // @< Start on TCLK1 signal. Falling Edge. If using this on TC1 with GPT_CLOCK_xx_TIMx, the TIMx output will be used instead.
#define GPT_TRIGGER_BE_TCLK1 0x32 // @< Start on TCLK1 signal. Both Edges. If using this on TC1 with GPT_CLOCK_xx_TIMx, the TIMx output will be used instead.
#define GPT_TRIGGER_RE_TCLK2 0x13 // @< Start on TCLK2 signal. Rising Edge. If using this on TC2 with GPT_CLOCK_xx_TIMx, the TIMx output will be used instead.
#define GPT_TRIGGER_FE_TCLK2 0x23 // @< Start on TCLK2 signal. Falling Edge. If using this on TC2 with GPT_CLOCK_xx_TIMx, the TIMx output will be used instead.
#define GPT_TRIGGER_BE_TCLK2 0x33 // @< Start on TCLK2 signal. Both Edges. If using this on TC2 with GPT_CLOCK_xx_TIMx, the TIMx output will be used instead.
} GPTConfig;
/**
* @brief Structure representing a GPT driver.
*/
struct GPTDriver {
/**
* @brief Driver state.
*/
gptstate_t state;
/**
* @brief Current configuration data.
*/
const GPTConfig *config;
#if defined(GPT_DRIVER_EXT_FIELDS)
GPT_DRIVER_EXT_FIELDS
#endif
/* End of the mandatory fields.*/
/**
* @brief Pointer to the TCx registers block.
*/
AT91S_TC *tc;
};
/*===========================================================================*/
/* Driver macros. */
/*===========================================================================*/
/*===========================================================================*/
/* External declarations. */
/*===========================================================================*/
#if AT91_GPT_USE_TC0 && !defined(__DOXYGEN__)
extern GPTDriver GPTD1;
#endif
#if AT91_GPT_USE_TC1 && !defined(__DOXYGEN__)
extern GPTDriver GPTD2;
#endif
#if AT91_GPT_USE_TC2 && !defined(__DOXYGEN__)
extern GPTDriver GPTD3;
#endif
#ifdef __cplusplus
extern "C" {
#endif
void gpt_lld_init(void);
void gpt_lld_start(GPTDriver *gptp);
void gpt_lld_stop(GPTDriver *gptp);
void gpt_lld_start_timer(GPTDriver *gptp, gptcnt_t period);
void gpt_lld_stop_timer(GPTDriver *gptp);
void gpt_lld_change_interval(GPTDriver *gptp, gptcnt_t interval);
void gpt_lld_polled_delay(GPTDriver *gptp, gptcnt_t interval);
#ifdef __cplusplus
}
#endif
#endif /* HAL_USE_GPT */
#endif /* _GPT_LLD_H_ */
/** @} */
|
