Statistics
| Branch: | Tag: | Revision:

amiro-lld / include / PCAL6524 / v1 / alld_PCAL6524_v1.h @ a9c9cd33

History | View | Annotate | Download (16.64 KB)

1 e3287406 Thomas Schöpping
/*
2
AMiRo-LLD is a compilation of low-level hardware drivers for the Autonomous Mini Robot (AMiRo) platform.
3
Copyright (C) 2016..2019  Thomas Schöpping et al.
4

5
This program is free software: you can redistribute it and/or modify
6
it under the terms of the GNU Lesser General Public License as published by
7
the Free Software Foundation, either version 3 of the License, or
8
(at your option) any later version.
9

10
This program is distributed in the hope that it will be useful,
11
but WITHOUT ANY WARRANTY; without even the implied warranty of
12
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
13
GNU Lesser General Public License for more details.
14

15
You should have received a copy of the GNU Lesser General Public License
16
along with this program.  If not, see <http://www.gnu.org/licenses/>.
17
*/
18
19
/**
20 1d5bcc82 Thomas Schöpping
 * @file    alld_PCAL6524_v1.h
21 e3287406 Thomas Schöpping
 * @brief   GPIO extender macros and structures.
22
 *
23
 * @addtogroup lld_gpioext
24
 * @{
25
 */
26
27 1d5bcc82 Thomas Schöpping
#ifndef AMIROLLD_PCAL6524_V1_H
28
#define AMIROLLD_PCAL6524_V1_H
29 e3287406 Thomas Schöpping
30
#include <amiro-lld.h>
31
32 1d5bcc82 Thomas Schöpping
#if (defined(AMIROLLD_CFG_PCAL6524) && (AMIROLLD_CFG_PCAL6524 == 1)) || defined(__DOXYGEN__)
33 e3287406 Thomas Schöpping
34 ef078306 Thomas Schöpping
/******************************************************************************/
35
/* CONSTANTS                                                                  */
36
/******************************************************************************/
37
38 e3287406 Thomas Schöpping
/**
39
 * @brief   Maximum I2C frequency.
40
 */
41
#define PCAL6524_LLD_I2C_MAXFREQUENCY           1000000
42
43
/**
44
 * @brief   A falling edge indicats an interrupt.
45
 */
46
#define PCAL6524_LLD_INT_EDGE                   APAL_GPIO_EDGE_FALLING
47
48 ef078306 Thomas Schöpping
/******************************************************************************/
49
/* SETTINGS                                                                   */
50
/******************************************************************************/
51
52
/******************************************************************************/
53
/* CHECKS                                                                     */
54
/******************************************************************************/
55
56
/******************************************************************************/
57
/* DATA STRUCTURES AND TYPES                                                  */
58
/******************************************************************************/
59
60 e3287406 Thomas Schöpping
/**
61
 * @brief   The PCAL6524Driver sruct.
62
 */
63
typedef struct {
64
  apalI2CDriver_t* i2cd;
65
  apalI2Caddr_t addr;
66
} PCAL6524Driver;
67
68
/**
69
 * @brief   Possible I2C address configurations.
70
 */
71
enum {
72
  PCAL6524_LLD_I2C_ADDR_FIXED     = 0x0020u,  /**< Fixed part of the I2C address. */
73
  PCAL6524_LLD_I2C_ADDR_SCL       = 0x0020u,  /**< ADDR pin connected to SCL. */
74
  PCAL6524_LLD_I2C_ADDR_SDA       = 0x0021u,  /**< ADDR pin connected to SDA. */
75
  PCAL6524_LLD_I2C_ADDR_VSS       = 0x0022u,  /**< ADDR pin connected to VSS. */
76
  PCAL6524_LLD_I2C_ADDR_VDD       = 0x0023u,  /**< ADDR pin connected to VDD. */
77
  PCAL6524_LLD_I2C_ADDR_DEVICEID  = 0x007Cu,  /**< Special address to read device ID information. */
78
};
79
80
/**
81
 * @brief   Command bit to enable auto-incrementation of command value.
82
 * @details Can be added (ORed) to any command value.
83
 */
84
#define PCAL6524_LLD_CMD_AUTOINCREMENT          0x80u
85
86
/**
87
 * @brief   The total number of registers that can be accessed.
88
 * @note    This is the maximum number of bytes that may be read or written continuously.
89
 */
90
#define PCAL6524_LLD_NUM_REGISTERS              52
91
92
typedef union {
93
  uint8_t raw[3];
94
  struct {
95
    uint16_t name : 12;
96
    uint16_t part : 9;
97
    uint8_t revision : 3;
98
  };
99
} pcal6524_lld_deviceid_t;
100
101
/**
102
 * @brief   Control commands for the PCAL6524.
103
 */
104
typedef enum {
105
  PCAL6524_LLD_CMD_INPUT_P0                             = 0x00u,  /**<  read only */
106
  PCAL6524_LLD_CMD_INPUT_P1                             = 0x01u,  /**<  read only */
107
  PCAL6524_LLD_CMD_INPUT_P2                             = 0x02u,  /**<  read only */
108
  PCAL6524_LLD_CMD_OUTPUT_P0                            = 0x04u,  /**< read/write */
109
  PCAL6524_LLD_CMD_OUTPUT_P1                            = 0x05u,  /**< read/write */
110
  PCAL6524_LLD_CMD_OUTPUT_P2                            = 0x06u,  /**< read/write */
111
  PCAL6524_LLD_CMD_POLARITYINVERSION_P0                 = 0x08u,  /**< read/write */
112
  PCAL6524_LLD_CMD_POLARITYINVERSION_P1                 = 0x09u,  /**< read/write */
113
  PCAL6524_LLD_CMD_POLARITYINVERSION_P2                 = 0x0Au,  /**< read/write */
114
  PCAL6524_LLD_CMD_CONFIGURATION_P0                     = 0x0Cu,  /**< read/write */
115
  PCAL6524_LLD_CMD_CONFIGURATION_P1                     = 0x0Du,  /**< read/write */
116
  PCAL6524_LLD_CMD_CONFIGURATION_P2                     = 0x0Eu,  /**< read/write */
117
  PCAL6524_LLD_CMD_OUTPUTDRIVESTRENGTH_P0A              = 0x40u,  /**< read/write */
118
  PCAL6524_LLD_CMD_OUTPUTDRIVESTRENGTH_P0B              = 0x41u,  /**< read/write */
119
  PCAL6524_LLD_CMD_OUTPUTDRIVESTRENGTH_P1A              = 0x42u,  /**< read/write */
120
  PCAL6524_LLD_CMD_OUTPUTDRIVESTRENGTH_P1B              = 0x43u,  /**< read/write */
121
  PCAL6524_LLD_CMD_OUTPUTDRIVESTRENGTH_P2A              = 0x44u,  /**< read/write */
122
  PCAL6524_LLD_CMD_OUTPUTDRIVESTRENGTH_P2B              = 0x45u,  /**< read/write */
123
  PCAL6524_LLD_CMD_INPUTLATCH_P0                        = 0x48u,  /**< read/write */
124
  PCAL6524_LLD_CMD_INPUTLATCH_P1                        = 0x49u,  /**< read/write */
125
  PCAL6524_LLD_CMD_INPUTLATCH_P2                        = 0x4Au,  /**< read/write */
126
  PCAL6524_LLD_CMD_PUPDENABLE_P0                        = 0x4Cu,  /**< read/write */
127
  PCAL6524_LLD_CMD_PUPDENABLE_P1                        = 0x4Du,  /**< read/write */
128
  PCAL6524_LLD_CMD_PUPDENABLE_P2                        = 0x4Eu,  /**< read/write */
129
  PCAL6524_LLD_CMD_PUPDSELECTION_P0                     = 0x50u,  /**< read/write */
130
  PCAL6524_LLD_CMD_PUPDSELECTION_P1                     = 0x51u,  /**< read/write */
131
  PCAL6524_LLD_CMD_PUPDSELECTION_P2                     = 0x52u,  /**< read/write */
132
  PCAL6524_LLD_CMD_INTERRUPTMASK_P0                     = 0x54u,  /**< read/write */
133
  PCAL6524_LLD_CMD_INTERRUPTMASK_P1                     = 0x55u,  /**< read/write */
134
  PCAL6524_LLD_CMD_INTERRUPTMASK_P2                     = 0x56u,  /**< read/write */
135
  PCAL6524_LLD_CMD_INTERRUPTSTATUS_P0                   = 0x58u,  /**<  read only */
136
  PCAL6524_LLD_CMD_INTERRUPTSTATUS_P1                   = 0x59u,  /**<  read only */
137
  PCAL6524_LLD_CMD_INTERRUPTSTATUS_P2                   = 0x5Au,  /**<  read only */
138
  PCAL6524_LLD_CMD_OUTPUTCONFIGURATION                  = 0x5Cu,  /**< read/write */
139
  PCAL6524_LLD_CMD_INTERRUPTEDGE_P0A                    = 0x60u,  /**< read/write */
140
  PCAL6524_LLD_CMD_INTERRUPTEDGE_P0B                    = 0x61u,  /**< read/write */
141
  PCAL6524_LLD_CMD_INTERRUPTEDGE_P1A                    = 0x62u,  /**< read/write */
142
  PCAL6524_LLD_CMD_INTERRUPTEDGE_P1B                    = 0x63u,  /**< read/write */
143
  PCAL6524_LLD_CMD_INTERRUPTEDGE_P2A                    = 0x64u,  /**< read/write */
144
  PCAL6524_LLD_CMD_INTERRUPTEDGE_P2B                    = 0x65u,  /**< read/write */
145
  PCAL6524_LLD_CMD_INTERRUPTCLEAR_P0                    = 0x68u,  /**< write only */
146
  PCAL6524_LLD_CMD_INTERRUPTCLEAR_P1                    = 0x69u,  /**< write only */
147
  PCAL6524_LLD_CMD_INTERRUPTCLEAR_P2                    = 0x6Au,  /**< write only */
148
  PCAL6524_LLD_CMD_INPUTSTATUS_P0                       = 0x6Cu,  /**<  read only */
149
  PCAL6524_LLD_CMD_INPUTSTATUS_P1                       = 0x6Du,  /**<  read only */
150
  PCAL6524_LLD_CMD_INPUTSTATUS_P2                       = 0x6Eu,  /**<  read only */
151
  PCAL6524_LLD_CMD_INDIVIDUALPINOUTPUTCONFIGURATION_P0  = 0x70u,  /**< read/write */
152
  PCAL6524_LLD_CMD_INDIVIDUALPINOUTPUTCONFIGURATION_P1  = 0x71u,  /**< read/write */
153
  PCAL6524_LLD_CMD_INDIVIDUALPINOUTPUTCONFIGURATION_P2  = 0x72u,  /**< read/write */
154
  PCAL6524_LLD_CMD_SWITCHDEBOUNCEENABLE_P0              = 0x74u,  /**< read/write */
155
  PCAL6524_LLD_CMD_SWITCHDEBOUNCEENABLE_P1              = 0x75u,  /**< read/write */
156
  PCAL6524_LLD_CMD_SWITCHDEBOUNCECOUNT                  = 0x76u,  /**< read/write */
157
} pcal6524_lld_cmd_t;
158
159
/**
160
 * @brief   Input register bit values.
161
 * @details The bits in the input register reflect the incoming logic levels per pin.
162
 *          If a pin is configured as ouput, the bit reflects th set value or is forced to 0 in case the outpus is configured as open-drain.
163
 *          If a pin is configured as input with latched interrupts, reading the according port will reset the input value and clear the interrupt.
164
 */
165
typedef enum {
166
  PCAL6524_LLD_INPUT_LOW  = 0b0,
167
  PCAL6524_LLD_INPUT_HIGH = 0b1,
168
} pcal6524_lld_input_t;
169
170
/**
171
 * @brief   Output register bit values.
172
 * @details Defines the logic level to be driven by output pins.
173
 *          The default value (after reset) is 0b1 (high),
174
 */
175
typedef enum {
176
  PCAL6524_LLD_OUTPUT_LOW     = 0b0,
177
  PCAL6524_LLD_OUTPUT_HIGH    = 0b1,
178
} pcal6524_lld_output_t;
179
180
/**
181
 * @brief   Polarity inversion register values.
182
 * @details Allows to inverse the logic values written to the input register.
183
 *          The default value (after reset) is 0b0 (disabled).
184
 */
185
typedef enum {
186
  PCAL6524_LLD_POLARITYINVERSION_DISABLED = 0b0,
187
  PCAL6524_LLD_POLARITYINVERSION_ENABLED  = 0b1,
188
} pcal6524_lld_polarityinversion_t;
189
190
/**
191
 * @brief   Configuration regsiter bit values.
192
 * @details Configures the direction of the I/O pins to either high-impedance input or output.
193
 *          The default value (after reset) is 0b1 (input).
194
 */
195
typedef enum {
196
  PCAL6524_LLD_CONFIGURATION_INPUT    = 0b1,
197
  PCAL6524_LLD_CONFIGURATION_OUTPUT   = 0b0,
198
} pcal6524_lld_configuration_t;
199
200
/**
201
 * @brief   Output drive strength register mask values.
202
 * @details Configures maximum current of output pins can be defined via a 2 bit mask per pin.
203
 *          Toggling multiple output pins simultaneously a peak current may induce noise to supply voltage and ground.
204
 *          By lowering the maximum current per pin. this effect can be minimized.
205
 *          The default value (after reset) is 0b11 (factor 1x)
206
 */
207
typedef enum {
208
  PCAL6524_LL_OUTPUTDRIVESTRENGTH_0_25    = 0b00,
209
  PCAL6524_LL_OUTPUTDRIVESTRENGTH_0_5     = 0b01,
210
  PCAL6524_LL_OUTPUTDRIVESTRENGTH_0_75    = 0b10,
211
  PCAL6524_LL_OUTPUTDRIVESTRENGTH_1       = 0b11,
212
} pcal6524_lld_outputdrivestrength_t;
213
214
/**
215
 * @brief   Input latch register bit values.
216
 * @details Allows to latch interrupt and input states per pin, if an interrupt occurred.
217
 *          The default value (after reset) is 0b0 (disabled).
218
 */
219
typedef enum {
220
  PCAL6524_LLD_INPUTLATCH_ENABLED   = 0b1,
221
  PCAL6524_LLD_INPUTLATCH_DISABLED  = 0b0,
222
} pcal6524_lld_inputlatch_t;
223
224
/**
225
 * @brief   Pull-up/Pull-down enable register bis values.
226
 * @details Configures per pin whether the pull-up/pull-down resistors shall be enabled.
227
 *          If a pin is configured as open-drain output, the setting in this register are overridden and the resistors are disconnected.
228
 *          The default value (after reset) is 0b0 (disabled).
229
 */
230
typedef enum {
231
  PCAL6524_LLD_PUPD_ENABLED   = 0b1,
232
  PCAL6524_LLD_PUPD_DISABLED  = 0b0,
233
} pcal6524_lld_pupdenable_t;
234
235
/**
236
 * @brief   Pull-up/Pull-dpwn selection register bit values.
237
 * @details Selects between pull-up and pull-down resistor (100 kΩ) per pin.
238
 *          Has no effect if the according bit is the pull-up/pull-down enable register is disabled.
239
 *          The default value (after reset) is 0b1 (pull-up).
240
 */
241
typedef enum {
242
  PCAL6524_LLD_PUPDSELECTION_PULLUP   = 0b1,
243
  PCAL6524_LLD_PUPDSELECTION_PULLDOWN = 0b0,
244
} pcal6524_lld_pupdselection_t;
245
246
/**
247
 * @brief   Interrupt mask register bit values.
248
 * @details Allows to enable (value 0) or disable (value 1) interrupts per pin.
249
 *          The default value (after reset) is 0b1 (interrupt disabled).
250
 */
251
typedef enum {
252
  PCAL6524_LLD_INTERRUPTMASK_ENABLED  = 0b0,
253
  PCAL6524_LLD_INTERRUPTMASK_DSIABLED = 0b1,
254
} pcal6524_lld_interruptmask_t;
255
256
/**
257
 * @brief   Interrupt status register bit value.
258
 * @details Indicates whether an interrupt occurred per pin.
259
 *          After reset the register is initialized with 0b0 (no interrupt occurred yet).
260
 */
261
typedef enum {
262
  PCAL6524_LLD_INTERRUPTSTATUS_ACTIVE   = 0b1,
263
  PCAL6524_LLD_INTERRUPTSTATUS_INACTIVE = 0b0,
264
} pcal6542_lld_interruptstatus_t;
265
266
/**
267
 * @brief   Output port configuration register mask of valid bits.
268
 */
269
#define PCAL6524_LLD_OUTPUTCONFIGURATION_MASK       0x07u
270
271
/**
272
 * @brief   Output port configuration register mask for I/O port 0.
273
 */
274
#define PCAL6524_LLD_OUTPUTCONFIGURATION_MASK_PORT0 0x01u
275
276
/**
277
 * @brief   Output port configuration register mask for I/O port 1.
278
 */
279
#define PCAL6524_LLD_OUTPUTCONFIGURATION_MASK_PORT1 0x02u
280
281
/**
282
 * @brief   Output port configuration register mask for I/O port 2.
283
 */
284
#define PCAL6524_LLD_OUTPUTCONFIGURATION_MASK_PORT2 0x04u
285
286
/**
287
 * @brief   Output port configuration register bit values.
288
 * @details Configures all ouput pins per port to be push-pull or open-drain.
289
 *          The default value (after reset) is 0b0 (push-pull).
290
 */
291
typedef enum {
292
  PCAL6524_LLD_OUTPUTCONFIGURATION_PUSHPULL   = 0b0,
293
  PCAL6524_LLD_OUTPUTCONFIGURATION_OPENDRAIN  = 0b1,
294
} pcal6524_lld_outputconfiguration_t;
295
296
/**
297
 * @brief   Interrupt edge register mask values.
298
 * @details Configures the type of event that would cause an interrupt per pin.
299
 *          The default value (after reset) is 0b00 (level triggered).
300
 */
301
typedef enum {
302
  PCAL6524_LLD_INTERRUPTEDGE_LEVELTRIGGERED = 0b00,
303
  PCAL6524_LLD_INTERRUPTEDGE_RISINGEDGE     = 0b01,
304
  PCAL6524_LLD_INTERRUPTEDGE_FALLINGEDGE    = 0b10,
305
  PCAL6524_LLD_INTERRUPTEDGE_ANYEDGE        = 0b11,
306
} pcal6524_lld_interruptedge_t;
307
308
/**
309
 * @brief   Input status register bit values.
310
 * @details Reflects the current logic level per pin similar to the input register.
311
 *          However, values are not latched and reading the register will not reset interrupts.
312
 */
313
typedef enum {
314
  PCAL6524_LLD_INPUTSTATUS_LOW  = 0b0,
315
  PCAL6524_LLD_INPUTSTATUS_HIGH = 0b1,
316
} pcal6524_lld_inputstatus_t;
317
318
/**
319
 * @brief   Individual pin output configuration register bit values.
320
 * @details Can be used to invert the port-wide push-pull/open-drain configuration via the ouput port configuration register per pin.
321
 *          the default value (after reset) is 0b0 (not inverted).
322
 */
323
typedef enum {
324
  PCAL6524_LLD_INDIVIDUALPINOUTPUTCONFIGURATION_PORT      = 0b0,
325
  PCAL6524_LLD_INDIVIDUALPINOUTPUTCONFIGURATION_INVERTED  = 0b1,
326
} pcal6524_lld_individualpinoutputconfiguration_t;
327
328
/**
329
 * @brief   Switch debounce enable register bit values.
330
 * @details Allows to enable debounce functionality for I/O ports 0 and 1.
331
 *          In order to use the debounce feature, an oscillator signal must be applied to pin 0 of port 0.
332
 *          The default value (after reset) is 0b0 (disabled).
333
 */
334
typedef enum {
335
  PCAL6524_LLD_SWITCHDEBOUNCE_ENABLED   = 0b1,
336
  PCAL6524_LLD_SWITCHDEBOUNCE_DISABLED  = 0b0,
337
} pcal6524_lld_switchdebounceenable_t;
338
339 ef078306 Thomas Schöpping
/******************************************************************************/
340
/* MACROS                                                                     */
341
/******************************************************************************/
342
343
/******************************************************************************/
344
/* EXTERN DECLARATIONS                                                        */
345
/******************************************************************************/
346
347 e3287406 Thomas Schöpping
#ifdef __cplusplus
348
extern "C" {
349
#endif
350
  uint8_t pcal6524_lld_cmd_groupsize(const pcal6524_lld_cmd_t cmd);
351
352
//  apalExitStatus_t pcal6524_lld_read_id(const PCAL6524Driver* const pcal6524d, uint8_t* const data, const apalTime_t timeout);
353
  apalExitStatus_t pcal6524_lld_read_reg(const PCAL6524Driver* const pcal6524d, const pcal6524_lld_cmd_t reg, uint8_t* const data, const apalTime_t timeout);
354
  apalExitStatus_t pcal6524_lld_write_reg(const PCAL6524Driver* const pcal6524d, const pcal6524_lld_cmd_t reg, const uint8_t data, const apalTime_t timeout);
355
  apalExitStatus_t pcal6524_lld_read_group(const PCAL6524Driver* const pcal6524d, const pcal6524_lld_cmd_t reg, uint8_t* const data, const apalTime_t timeout);
356
  apalExitStatus_t pcal6524_lld_write_group(const PCAL6524Driver* const pcal6524d, const pcal6524_lld_cmd_t reg, const uint8_t* const data, const apalTime_t timeout);
357
  apalExitStatus_t pcal6524_lld_read_continuous(const PCAL6524Driver* const pcal6524d, const pcal6524_lld_cmd_t reg, uint8_t* const data, const uint8_t length, const apalTime_t timeout);
358
  apalExitStatus_t pcal6524_lld_write_continuous(const PCAL6524Driver* const pcal6524d, const pcal6524_lld_cmd_t reg, const uint8_t* const data, const uint8_t length, const apalTime_t timeout);
359
#ifdef __cplusplus
360
}
361
#endif
362
363 ef078306 Thomas Schöpping
/******************************************************************************/
364
/* INLINE FUNCTIONS                                                           */
365
/******************************************************************************/
366
367 1d5bcc82 Thomas Schöpping
#endif /* defined(AMIROLLD_CFG_PCAL6524) && (AMIROLLD_CFG_PCAL6524 == 1) */
368 e3287406 Thomas Schöpping
369 1d5bcc82 Thomas Schöpping
#endif /* AMIROLLD_PCAL6524_V1_H */
370 e3287406 Thomas Schöpping
371
/** @} */