Outline ![]()
Files ![]()
loading (4/5)...
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
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
/*
* SPDX-FileCopyrightText: 2024 Espressif Systems (Shanghai) CO LTD
*
* SPDX-License-Identifier: Apache-2.0
*/
#include <stdint.h>
#include <stdbool.h>
#include <string.h>
#include "sdkconfig.h"
#include "soc/soc_caps.h"
#include "esp_attr.h"
#include "esp_rom_gpio.h"
#include "driver/gpio.h"
#include "hal/gpio_ll.h"
#include "esp_err.h"
#include "freertos/FreeRTOS.h"
#include "freertos/semphr.h"
#include "freertos/ringbuf.h"
#include "esp_intr_alloc.h"
#include "hal/i2c_ll.h"
#include "i2c_private.h"
#include "driver/i2c_slave.h"
#include "esp_memory_utils.h"
#if CONFIG_I2C_ENABLE_DEBUG_LOG
// The local log level must be defined before including esp_log.h
// Set the maximum log level for this source file
#define LOG_LOCAL_LEVEL ESP_LOG_DEBUG
#endif
#include "esp_log.h"
#include "esp_check.h"
static const char *TAG = "i2c.slave";
IRAM_ATTR static bool i2c_slave_read_rx(i2c_slave_dev_t *i2c_slave, uint8_t *data, size_t len, size_t *read_len)
{
BaseType_t xTaskWoken = pdFALSE;
size_t read_size = len;
size_t actual_size = 0;
size_t available_size = 0;
size_t get_size = 0;
uint8_t *rx_data = NULL;
vRingbufferGetInfo(i2c_slave->rx_ring_buf, NULL, NULL, NULL, NULL, &available_size);
if (available_size < read_size) {
read_size = available_size;
}
while (read_size) {
actual_size = 0;
rx_data = (uint8_t *)xRingbufferReceiveUpToFromISR(i2c_slave->rx_ring_buf, &actual_size, read_size);
if (rx_data != NULL && actual_size != 0) {
memcpy(data + get_size, rx_data, actual_size);
vRingbufferReturnItemFromISR(i2c_slave->rx_ring_buf, rx_data, &xTaskWoken);
get_size += actual_size;
read_size -= actual_size;
} else {
break;
}
}
*read_len = get_size;
return xTaskWoken;
}
IRAM_ATTR static bool i2c_slave_handle_tx_fifo(i2c_slave_dev_t *i2c_slave)
{
BaseType_t xTaskWoken = pdFALSE;
i2c_hal_context_t *hal = &i2c_slave->base->hal;
uint8_t *data;
uint32_t fifo_len = 0;
xSemaphoreTakeFromISR(i2c_slave->operation_mux, &xTaskWoken);
i2c_ll_get_txfifo_len(hal->dev, &fifo_len);
size_t actual_get_len = 0;
while (fifo_len > 0) {
data = xRingbufferReceiveUpToFromISR(i2c_slave->tx_ring_buf, &actual_get_len, fifo_len);
if (data) {
portENTER_CRITICAL_ISR(&i2c_slave->base->spinlock);
i2c_ll_write_txfifo(hal->dev, data, actual_get_len);
fifo_len -= actual_get_len;
portEXIT_CRITICAL_ISR(&i2c_slave->base->spinlock);
vRingbufferReturnItemFromISR(i2c_slave->tx_ring_buf, data, &xTaskWoken);
} else {
// No data in ringbuffer, so disable the tx interrupt.
i2c_ll_slave_disable_tx_it(hal->dev);
break;
}
}
xSemaphoreGiveFromISR(i2c_slave->operation_mux, &xTaskWoken);
return xTaskWoken;
}
IRAM_ATTR static bool i2c_slave_handle_rx_fifo(i2c_slave_dev_t *i2c_slave, uint32_t len)
{
i2c_hal_context_t *hal = &i2c_slave->base->hal;
uint8_t data[SOC_I2C_FIFO_LEN];
BaseType_t xTaskWoken = pdFALSE;
xSemaphoreTakeFromISR(i2c_slave->operation_mux, &xTaskWoken);
if (len) {
portENTER_CRITICAL_ISR(&i2c_slave->base->spinlock);
i2c_ll_read_rxfifo(hal->dev, data, len);
portEXIT_CRITICAL_ISR(&i2c_slave->base->spinlock);
BaseType_t res = xRingbufferSendFromISR(i2c_slave->rx_ring_buf, (void *)data, len, &xTaskWoken);
if (res == pdTRUE) {
i2c_slave->rx_data_count += len;
}
}
xSemaphoreGiveFromISR(i2c_slave->operation_mux, &xTaskWoken);
return xTaskWoken;
}
#if SOC_I2C_SLAVE_CAN_GET_STRETCH_CAUSE
IRAM_ATTR static bool i2c_slave_handle_stretch_event(i2c_slave_dev_t *i2c_slave, uint32_t rx_fifo_exist_len)
{
i2c_slave_stretch_cause_t cause;
BaseType_t xTaskWoken = pdFALSE;
i2c_hal_context_t *hal = &i2c_slave->base->hal;
i2c_ll_slave_get_stretch_cause(hal->dev, &cause);
if (cause == I2C_SLAVE_STRETCH_CAUSE_ADDRESS_MATCH) {
if (rx_fifo_exist_len) {
xTaskWoken |= i2c_slave_handle_rx_fifo(i2c_slave, rx_fifo_exist_len);
}
if (i2c_slave->rx_data_count) {
uint32_t len = i2c_slave->rx_data_count;
size_t read_len;
xTaskWoken |= i2c_slave_read_rx(i2c_slave, i2c_slave->receive_desc.buffer, len, &read_len);
i2c_slave_rx_done_event_data_t edata = {};
edata.buffer = i2c_slave->receive_desc.buffer;
edata.length = read_len;
if (i2c_slave->receive_callback) {
xTaskWoken |= i2c_slave->receive_callback(i2c_slave, &edata, i2c_slave->user_ctx);
}
i2c_slave->rx_data_count = 0;
}
i2c_slave_request_event_data_t evt_data = {};
if (i2c_slave->request_callback) {
xTaskWoken |= i2c_slave->request_callback(i2c_slave, &evt_data, i2c_slave->user_ctx);
}
//will clear after request callback
} else if (cause == I2C_SLAVE_STRETCH_CAUSE_TX_EMPTY) {
xTaskWoken |= i2c_slave_handle_tx_fifo(i2c_slave);
i2c_ll_slave_clear_stretch(hal->dev);
} else if (cause == I2C_SLAVE_STRETCH_CAUSE_RX_FULL) {
xTaskWoken |= i2c_slave_handle_rx_fifo(i2c_slave, rx_fifo_exist_len);
i2c_ll_slave_clear_stretch(hal->dev);
}
return xTaskWoken;
}
#endif
IRAM_ATTR static void i2c_slave_isr_handler(void *arg)
{
BaseType_t pxHigherPriorityTaskWoken = false;
i2c_slave_dev_t *i2c_slave = (i2c_slave_dev_t *)arg;
i2c_hal_context_t *hal = &i2c_slave->base->hal;
uint32_t int_mask = 0;
i2c_ll_get_intr_mask(hal->dev, &int_mask);
i2c_ll_clear_intr_mask(hal->dev, int_mask);
uint32_t rx_fifo_exist_len = 0;
i2c_ll_get_rxfifo_cnt(hal->dev, &rx_fifo_exist_len);
i2c_slave_read_write_status_t slave_rw = i2c_ll_slave_get_read_write_status(hal->dev);
if (int_mask & I2C_INTR_SLV_RXFIFO_WM) {
pxHigherPriorityTaskWoken |= i2c_slave_handle_rx_fifo(i2c_slave, rx_fifo_exist_len);
}
if (int_mask & I2C_INTR_SLV_COMPLETE) {
if (rx_fifo_exist_len) {
pxHigherPriorityTaskWoken |= i2c_slave_handle_rx_fifo(i2c_slave, rx_fifo_exist_len);
}
if (i2c_slave->rx_data_count) {
uint32_t len = i2c_slave->rx_data_count;
size_t read_len;
pxHigherPriorityTaskWoken |= i2c_slave_read_rx(i2c_slave, i2c_slave->receive_desc.buffer, len, &read_len);
i2c_slave_rx_done_event_data_t edata = {};
edata.buffer = i2c_slave->receive_desc.buffer;
edata.length = read_len;
if (i2c_slave->receive_callback) {
pxHigherPriorityTaskWoken |= i2c_slave->receive_callback(i2c_slave, &edata, i2c_slave->user_ctx);
}
i2c_slave->rx_data_count = 0;
}
if (slave_rw == I2C_SLAVE_READ_BY_MASTER) {
#if !SOC_I2C_SLAVE_CAN_GET_STRETCH_CAUSE
i2c_slave_request_event_data_t evt_data = {};
if (i2c_slave->request_callback) {
pxHigherPriorityTaskWoken |= i2c_slave->request_callback(i2c_slave, &evt_data, i2c_slave->user_ctx);
}
#endif
}
}
#if SOC_I2C_SLAVE_CAN_GET_STRETCH_CAUSE
if (int_mask & I2C_INTR_STRETCH) { // STRETCH
pxHigherPriorityTaskWoken |= i2c_slave_handle_stretch_event(i2c_slave, rx_fifo_exist_len);
}
#endif
if (int_mask & I2C_INTR_SLV_TXFIFO_WM) { // TX FiFo Empty
pxHigherPriorityTaskWoken |= i2c_slave_handle_tx_fifo(i2c_slave);
}
if (pxHigherPriorityTaskWoken) {
portYIELD_FROM_ISR();
}
}
static esp_err_t i2c_slave_device_destroy(i2c_slave_dev_handle_t i2c_slave)
{
i2c_ll_disable_intr_mask(i2c_slave->base->hal.dev, I2C_LL_SLAVE_EVENT_INTR);
if (i2c_slave->rx_ring_buf) {
vRingbufferDeleteWithCaps(i2c_slave->rx_ring_buf);
i2c_slave->rx_ring_buf = NULL;
}
if (i2c_slave->tx_ring_buf) {
vRingbufferDeleteWithCaps(i2c_slave->tx_ring_buf);
i2c_slave->tx_ring_buf = NULL;
}
if (i2c_slave->operation_mux) {
vSemaphoreDeleteWithCaps(i2c_slave->operation_mux);
i2c_slave->operation_mux = NULL;
}
if (i2c_slave->receive_desc.buffer) {
free(i2c_slave->receive_desc.buffer);
}
esp_err_t ret = i2c_release_bus_handle(i2c_slave->base);
free(i2c_slave);
return ret;
}
esp_err_t i2c_new_slave_device(const i2c_slave_config_t *slave_config, i2c_slave_dev_handle_t *ret_handle)
{
#if CONFIG_I2C_ENABLE_DEBUG_LOG
esp_log_level_set(TAG, ESP_LOG_DEBUG);
#endif
esp_err_t ret = ESP_OK;
i2c_slave_dev_t *i2c_slave = NULL;
ESP_RETURN_ON_FALSE(slave_config && ret_handle, ESP_ERR_INVALID_ARG, TAG, "invalid argument");
ESP_RETURN_ON_FALSE(GPIO_IS_VALID_GPIO(slave_config->sda_io_num) && GPIO_IS_VALID_GPIO(slave_config->scl_io_num), ESP_ERR_INVALID_ARG, TAG, "invalid SDA/SCL pin number");
#if SOC_LP_I2C_SUPPORTED
ESP_RETURN_ON_FALSE(slave_config->i2c_port != (SOC_I2C_NUM - 1), ESP_ERR_NOT_SUPPORTED, TAG, "LP i2c is not supported in I2C slave");
#endif
ESP_RETURN_ON_FALSE(slave_config->i2c_port < SOC_HP_I2C_NUM || slave_config->i2c_port == -1, ESP_ERR_INVALID_ARG, TAG, "invalid i2c port number");
#if SOC_I2C_SLAVE_SUPPORT_BROADCAST
ESP_RETURN_ON_FALSE(((slave_config->addr_bit_len != I2C_ADDR_BIT_LEN_10) || (!slave_config->flags.broadcast_en)), ESP_ERR_INVALID_STATE, TAG, "10bits address cannot used together with broadcast");
#endif
i2c_slave = heap_caps_calloc(1, sizeof(i2c_slave_dev_t), I2C_MEM_ALLOC_CAPS);
ESP_RETURN_ON_FALSE(i2c_slave, ESP_ERR_NO_MEM, TAG, "no memory for i2c slave bus");
ESP_GOTO_ON_ERROR(i2c_acquire_bus_handle(slave_config->i2c_port, &i2c_slave->base, I2C_BUS_MODE_SLAVE), err, TAG, "I2C bus acquire failed");
i2c_hal_context_t *hal = &i2c_slave->base->hal;
i2c_slave->base->scl_num = slave_config->scl_io_num;
i2c_slave->base->sda_num = slave_config->sda_io_num;
i2c_slave->base->pull_up_enable = slave_config->flags.enable_internal_pullup;
i2c_slave->rx_data_count = 0;
int i2c_port_num = slave_config->i2c_port;
ESP_GOTO_ON_ERROR(i2c_common_set_pins(i2c_slave->base), err, TAG, "i2c slave set pins failed");
i2c_slave->rx_ring_buf = xRingbufferCreateWithCaps(slave_config->receive_buf_depth, RINGBUF_TYPE_BYTEBUF, I2C_MEM_ALLOC_CAPS);
ESP_GOTO_ON_FALSE(i2c_slave->rx_ring_buf != NULL, ESP_ERR_INVALID_STATE, err, TAG, "ringbuffer create failed");
i2c_slave->operation_mux = xSemaphoreCreateBinaryWithCaps(I2C_MEM_ALLOC_CAPS);
ESP_GOTO_ON_FALSE(i2c_slave->operation_mux, ESP_ERR_NO_MEM, err, TAG, "No memory for binary semaphore");
xSemaphoreGive(i2c_slave->operation_mux);
uint8_t *rcv_buffer = heap_caps_calloc(1, slave_config->receive_buf_depth, I2C_MEM_ALLOC_CAPS);
ESP_RETURN_ON_FALSE(rcv_buffer, ESP_ERR_NO_MEM, TAG, "no memory for i2c slave receive internal buffer");
i2c_slave->receive_desc.buffer = rcv_buffer;
i2c_slave->receive_desc.rcv_fifo_cnt = slave_config->receive_buf_depth;
i2c_slave->tx_ring_buf = xRingbufferCreateWithCaps(slave_config->send_buf_depth, RINGBUF_TYPE_BYTEBUF, I2C_MEM_ALLOC_CAPS);
ESP_RETURN_ON_FALSE(i2c_slave->tx_ring_buf, ESP_ERR_NO_MEM, TAG, "no memory for i2c slave transmit ringbuffer");
#if I2C_USE_RETENTION_LINK
if (slave_config->flags.allow_pd != 0) {
i2c_create_retention_module(i2c_slave->base);
}
#endif // I2C_USE_RETENTION_LINK
int isr_flags = I2C_INTR_ALLOC_FLAG;
if (slave_config->intr_priority) {
isr_flags |= 1 << (slave_config->intr_priority);
}
ret = esp_intr_alloc_intrstatus(i2c_periph_signal[i2c_port_num].irq, isr_flags, (uint32_t)i2c_ll_get_interrupt_status_reg(hal->dev), I2C_LL_SLAVE_EVENT_INTR, i2c_slave_isr_handler, i2c_slave, &i2c_slave->base->intr_handle);
ESP_GOTO_ON_ERROR(ret, err, TAG, "install i2c slave interrupt failed");
portENTER_CRITICAL(&i2c_slave->base->spinlock);
i2c_hal_slave_init(hal);
i2c_ll_enable_fifo_mode(hal->dev, true);
i2c_ll_set_slave_addr(hal->dev, slave_config->slave_addr, false);
i2c_ll_set_tout(hal->dev, I2C_LL_MAX_TIMEOUT);
I2C_CLOCK_SRC_ATOMIC() {
i2c_ll_set_source_clk(hal->dev, slave_config->clk_source);
}
bool addr_10bit_en = slave_config->addr_bit_len != I2C_ADDR_BIT_LEN_7;
i2c_ll_set_slave_addr(hal->dev, slave_config->slave_addr, addr_10bit_en);
#if SOC_I2C_SLAVE_SUPPORT_BROADCAST
i2c_ll_slave_broadcast_enable(hal->dev, slave_config->flags.broadcast_en);
#endif
i2c_ll_set_txfifo_empty_thr(hal->dev, SOC_I2C_FIFO_LEN / 2);
i2c_ll_set_rxfifo_full_thr(hal->dev, SOC_I2C_FIFO_LEN / 2);
i2c_ll_set_sda_timing(hal->dev, 10, 10);
i2c_ll_disable_intr_mask(hal->dev, I2C_LL_INTR_MASK);
i2c_ll_clear_intr_mask(hal->dev, I2C_LL_INTR_MASK);
i2c_ll_enable_intr_mask(hal->dev, I2C_LL_SLAVE_RX_EVENT_INTR);
// Configure stretch
i2c_ll_slave_set_stretch_protect_num(hal->dev, I2C_LL_STRETCH_PROTECT_TIME);
i2c_ll_slave_enable_scl_stretch(hal->dev, true);
i2c_ll_slave_clear_stretch(hal->dev);
i2c_ll_update(hal->dev);
portEXIT_CRITICAL(&i2c_slave->base->spinlock);
*ret_handle = i2c_slave;
return ret;
err:
if (i2c_slave) {
i2c_slave_device_destroy(i2c_slave);
}
return ret;
}
esp_err_t i2c_del_slave_device(i2c_slave_dev_handle_t i2c_slave)
{
ESP_RETURN_ON_FALSE(i2c_slave, ESP_ERR_INVALID_ARG, TAG, "i2c slave not initialized");
int port_id = i2c_slave->base->port_num;
ESP_LOGD(TAG, "del i2c bus(%d)", port_id);
ESP_RETURN_ON_ERROR(i2c_slave_device_destroy(i2c_slave), TAG, "destroy i2c bus failed");
return ESP_OK;
}
esp_err_t i2c_slave_write(i2c_slave_dev_handle_t i2c_slave, const uint8_t *data, uint32_t len, uint32_t *write_len, int timeout_ms)
{
ESP_RETURN_ON_FALSE(i2c_slave, ESP_ERR_INVALID_ARG, TAG, "i2c slave not initialized");
ESP_RETURN_ON_FALSE(data, ESP_ERR_INVALID_ARG, TAG, "invalid data buffer");
ESP_RETURN_ON_FALSE(write_len, ESP_ERR_INVALID_ARG, TAG, "invalid write length pointer");
uint32_t free_fifo_len = 0;
uint32_t write_ringbuffer_len = 0;
uint32_t actual_write_fifo_size = 0;
uint8_t *existing_data = NULL;
size_t existing_size = 0;
i2c_hal_context_t *hal = &i2c_slave->base->hal;
TickType_t wait_ticks = (timeout_ms == -1) ? portMAX_DELAY : pdMS_TO_TICKS(timeout_ms);
xSemaphoreTake(i2c_slave->operation_mux, wait_ticks);
portENTER_CRITICAL(&i2c_slave->base->spinlock);
#if !SOC_I2C_SLAVE_CAN_GET_STRETCH_CAUSE
i2c_ll_slave_disable_tx_it(hal->dev);
uint32_t txfifo_len = 0;
i2c_ll_get_txfifo_len(hal->dev, &txfifo_len);
if (txfifo_len < SOC_I2C_FIFO_LEN) {
// For the target (esp32) cannot stretch, reset the fifo when there is any dirty data in fifo.
i2c_ll_txfifo_rst(hal->dev);
}
#endif
i2c_ll_get_txfifo_len(hal->dev, &free_fifo_len);
portEXIT_CRITICAL(&i2c_slave->base->spinlock);
// Check if there is any data in the ringbuffer in last transaction
existing_data = xRingbufferReceiveUpTo(i2c_slave->tx_ring_buf, &existing_size, 0, free_fifo_len);
if (existing_data) {
// has data, fill to the fifo
i2c_ll_write_txfifo(hal->dev, existing_data, existing_size);
free_fifo_len -= existing_size;
vRingbufferReturnItem(i2c_slave->tx_ring_buf, existing_data);
}
// Write data.
if (free_fifo_len) {
portENTER_CRITICAL(&i2c_slave->base->spinlock);
if (len < free_fifo_len) {
actual_write_fifo_size = len;
}
i2c_ll_write_txfifo(hal->dev, (uint8_t *)data, actual_write_fifo_size);
data += actual_write_fifo_size;
len -= actual_write_fifo_size;
portEXIT_CRITICAL(&i2c_slave->base->spinlock);
//write the rest of the bytes to the ringbuffer
}
if (len) {
write_ringbuffer_len = xRingbufferGetCurFreeSize(i2c_slave->tx_ring_buf);
if (len < write_ringbuffer_len) {
write_ringbuffer_len = len;
}
if (xRingbufferSend(i2c_slave->tx_ring_buf, data, write_ringbuffer_len, wait_ticks) != pdTRUE) {
write_ringbuffer_len = 0;
}
}
*write_len = write_ringbuffer_len + actual_write_fifo_size;
i2c_ll_slave_enable_tx_it(hal->dev);
i2c_ll_slave_clear_stretch(hal->dev);
xSemaphoreGive(i2c_slave->operation_mux);
return ESP_OK;
}
esp_err_t i2c_slave_register_event_callbacks(i2c_slave_dev_handle_t i2c_slave, const i2c_slave_event_callbacks_t *cbs, void *user_data)
{
ESP_RETURN_ON_FALSE(i2c_slave != NULL, ESP_ERR_INVALID_ARG, TAG, "i2c slave handle not initialized");
ESP_RETURN_ON_FALSE(cbs, ESP_ERR_INVALID_ARG, TAG, "invalid argument");
#if CONFIG_I2C_ISR_IRAM_SAFE
if (cbs->on_request) {
ESP_RETURN_ON_FALSE(esp_ptr_in_iram(cbs->on_request), ESP_ERR_INVALID_ARG, TAG, "i2c request occur callback not in IRAM");
}
if (cbs->on_receive) {
ESP_RETURN_ON_FALSE(esp_ptr_in_iram(cbs->on_receive), ESP_ERR_INVALID_ARG, TAG, "i2c receive occur callback not in IRAM");
}
if (user_data) {
ESP_RETURN_ON_FALSE(esp_ptr_internal(user_data), ESP_ERR_INVALID_ARG, TAG, "user context not in internal RAM");
}
#endif
i2c_slave->user_ctx = user_data;
i2c_slave->request_callback = cbs->on_request;
i2c_slave->receive_callback = cbs->on_receive;
return ESP_OK;
}
Details ![]()
Show: from Types: Columns: ![]( "Show Project Names")
![]( "Show Locations")
![]( "Show Referring Symbols")
![]( "Show Scope")
This file uses the notable symbols shown below. Click anywhere in the file to view more details.