aZholtikov/zh_ttp229
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zh_ttp229/zh_ttp229.c
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#include "zh_ttp229.h"
static const char *TAG = "zh_ttp229";
#define ZH_LOGI(msg, ...) ESP_LOGI(TAG, msg, ##__VA_ARGS__)
#define ZH_LOGE(msg, err, ...) ESP_LOGE(TAG, "[%s:%d:%s] " msg, __FILE__, __LINE__, esp_err_to_name(err), ##__VA_ARGS__)
#define ZH_ERROR_CHECK(cond, err, cleanup, msg, ...) \
if (!(cond)) \
{ \
ZH_LOGE(msg, err, ##__VA_ARGS__); \
cleanup; \
return err; \
}
#define ZH_ERROR_CHECK_CONT(cond, cleanup, msg, ...) \
if (!(cond)) \
{ \
ZH_LOGE(msg, ESP_FAIL, ##__VA_ARGS__); \
cleanup; \
continue; \
}
/** @brief Internal handle for a single TTP229 device instance.
*
* Fields are initialized by zh_ttp229_init() and used by the
* ISR handler, processing task, and deinitialization.
*/
struct _zh_ttp229_handle_t
{
gpio_num_t sdo_gpio; /*!< SDO (Serial Data Out) GPIO pin for touch data */
uint8_t device_number; /*!< Unique device number assigned at initialization */
uint8_t rmt_tx_start_delay; /*!< Time between SDO low-level pulse and RMT TX start (in microseconds) */
uint16_t debounce_time; /*!< Button debounce time in milliseconds */
zh_ttp229_work_mode_t work_mode; /*!< Touch pad configuration (8 or 16 pads) */
rmt_symbol_word_t rx_symbols; /*!< Received RMT symbol containing duration1 (pad data) */
rmt_channel_handle_t tx_channel; /*!< RMT TX channel handle (SCL clock generation) */
rmt_channel_handle_t rx_channel; /*!< RMT RX channel handle (SDO data capture) */
rmt_encoder_handle_t copy_encoder; /*!< Copy encoder handle for RMT TX */
};
/** @brief Queue entry passed from RMT RX callback to the ISR processing task.
*
* Contains a pointer to the TTP229 device handle for the device
* that triggered the interrupt.
*/
typedef struct
{
zh_ttp229_handle_t *handle; /*!< Pointer to the TTP229 device handle */
} zh_ttp229_queue_t;
TaskHandle_t zh_ttp229 = NULL; /*!< FreeRTOS task handle for the ISR processing task */
static QueueHandle_t _queue_handle = NULL; /*!< Internal event queue */
static zh_ttp229_stats_t _stats = {0}; /*!< Accumulated error and runtime statistics */
static zh_vector_t *_vector = NULL; /*!< Vector of device_number values for all initialized TTP229 devices */
/** @brief Validate the user-provided initialization configuration.
*
* Checks all parameter ranges, ensures work_mode is valid, and
* verifies device_number uniqueness across initialized devices.
*
* @param config Pointer to the user configuration
* @param handle Pointer to the allocated handle (partially filled)
*
* @return ESP_OK if all checks pass
* @return ESP_ERR_INVALID_ARG on invalid parameter values
*/
static esp_err_t _zh_ttp229_validate_config(const zh_ttp229_init_config_t *config, zh_ttp229_handle_t *handle);
/** @brief Configure GPIO for SDO input with positive-edge interrupt.
*
* Installs the ISR service if not yet installed, configures SDO as
* input with GPIO_INTR_POSEDGE, and registers the ISR handler.
*
* @param config Pointer to the user configuration
* @param handle Pointer to the handle (stores sdo_gpio)
*
* @return ESP_OK on success
* @return ESP_ERR_INVALID_ARG if GPIO pins are invalid or identical
* @return ESP_FAIL on ISR service or handler installation failure
*/
static esp_err_t _zh_ttp229_gpio_init(const zh_ttp229_init_config_t *config, zh_ttp229_handle_t *handle);
/** @brief Initialize RMT TX and RX channels with callbacks.
*
* Creates TX channel on SCL GPIO, RX channel on SDO GPIO, allocates
* the copy encoder, enables both channels, and registers the RX done
* callback.
*
* @param config Pointer to the user configuration
* @param handle Pointer to the handle (stores RMT handles)
*
* @return ESP_OK on success
* @return ESP_FAIL on RMT channel, encoder, or callback registration failure
*/
static esp_err_t _zh_ttp229_rmt_init(const zh_ttp229_init_config_t *config, zh_ttp229_handle_t *handle);
/** @brief Create the shared event queue on first device initialization.
*
* The queue is created only when vector_size equals 1 (first device).
*
* @param config Pointer to the user configuration
*
* @return ESP_OK on success
* @return ESP_FAIL if queue allocation fails
*/
static esp_err_t _zh_ttp229_resources_init(const zh_ttp229_init_config_t *config);
/** @brief Create the ISR processing task on first device initialization.
*
* The task is created only when vector_size equals 1 (first device).
*
* @param config Pointer to the user configuration
*
* @return ESP_OK on success
* @return ESP_FAIL if task creation fails
*/
static esp_err_t _zh_ttp229_task_init(const zh_ttp229_init_config_t *config);
/** @brief GPIO ISR handler triggered on SDO positive edge.
*
* Disables further interrupts, starts RMT receive on SDO, generates
* SCL clock pulses via RMT transmit on SCL, and yields to higher
* priority tasks.
*
* @param arg Pointer to the zh_ttp229_handle_t for this device
*/
static void _zh_ttp229_isr_handler(void *arg);
/** @brief FreeRTOS task that processes RMT RX data and posts events.
*
* Receives queue entries from the RMT RX callback, decodes the pad
* number from rx_symbols.duration1, posts a ZH_TTP229 event for
* detected touches, debounces by delaying, then re-enables GPIO
* interrupts. Runs until the queue is deleted.
*
* @param pvParameter Unused
*/
static void _zh_ttp229_isr_processing_task(void *pvParameter);
/** @brief RMT RX done callback that enqueues data to the processing task.
*
* Sends a zh_ttp229_queue_t entry to _queue_handle. Increments
* queue overflow error counter if the send fails.
*
* @param channel RMT channel handle (unused)
* @param edata RX done event data (unused)
* @param user_data Pointer to the zh_ttp229_handle_t
*
* @return true if a context switch was requested
* @return false otherwise
*/
static bool _zh_ttp229_rmt_rx_done_callback(rmt_channel_handle_t channel, const rmt_rx_done_event_data_t *edata, void *user_data);
ESP_EVENT_DEFINE_BASE(ZH_TTP229);
esp_err_t zh_ttp229_init(const zh_ttp229_init_config_t *config, zh_ttp229_handle_t **handle) // -V2008
{
ZH_LOGI("Touch pad initialization started.");
ZH_ERROR_CHECK(config != NULL && handle != NULL, ESP_ERR_INVALID_ARG, NULL, "Touch pad initialization failed. Invalid argument.");
ZH_ERROR_CHECK(*handle == NULL, ESP_ERR_INVALID_STATE, NULL, "Touch pad initialization failed. Touch pad is already initialized.");
*handle = heap_caps_calloc(1, sizeof(zh_ttp229_handle_t), MALLOC_CAP_8BIT);
ZH_ERROR_CHECK(_zh_ttp229_validate_config(config, *handle) == ESP_OK, ESP_FAIL, heap_caps_free(*handle); *handle = NULL, "Touch pad initialization failed. Initial configuration check failed.");
if (_vector == NULL)
{
ZH_ERROR_CHECK(zh_vector_init(&_vector, sizeof(uint8_t)) == ESP_OK, ESP_FAIL, heap_caps_free(*handle); *handle = NULL, "Touch pad initialization failed. Failed to create vector.");
}
ZH_ERROR_CHECK(zh_vector_push_back(&_vector, &config->device_number) == ESP_OK, ESP_FAIL, heap_caps_free(*handle); *handle = NULL, "Touch pad initialization failed. Failed to add vector data.");
ZH_ERROR_CHECK(_zh_ttp229_resources_init(config) == ESP_OK, ESP_FAIL, zh_vector_delete_back(&_vector); heap_caps_free(*handle); *handle = NULL, "Touch pad initialization failed. Resources initialization failed.");
// clang-format off
ZH_ERROR_CHECK(_zh_ttp229_task_init(config) == ESP_OK, ESP_FAIL,
zh_vector_delete_back(&_vector); heap_caps_free(*handle); *handle = NULL, "Touch pad initialization failed. Processing task initialization failed.");
ZH_ERROR_CHECK(_zh_ttp229_rmt_init(config, *handle) == ESP_OK, ESP_FAIL,
zh_vector_delete_back(&_vector); heap_caps_free(*handle); *handle = NULL, "Touch pad initialization failed. RMT initialization failed.");
// clang-format on
ZH_ERROR_CHECK(_zh_ttp229_gpio_init(config, *handle) == ESP_OK, ESP_FAIL,
{ZH_ERROR_CHECK(rmt_disable((*handle)->tx_channel) == ESP_OK, ESP_FAIL, NULL, "TX channel disable failed.")};
{ZH_ERROR_CHECK(rmt_disable((*handle)->rx_channel) == ESP_OK, ESP_FAIL, NULL, "RX channel disable failed.")};
{ZH_ERROR_CHECK(rmt_del_encoder((*handle)->copy_encoder) == ESP_OK, ESP_FAIL, NULL, "Delete encoder failed.")};
{ZH_ERROR_CHECK(rmt_del_channel((*handle)->tx_channel) == ESP_OK, ESP_FAIL, NULL, "Delete TX channel failed.")};
{ZH_ERROR_CHECK(rmt_del_channel((*handle)->rx_channel) == ESP_OK, ESP_FAIL, NULL, "Delete RX channel failed.")};
zh_vector_delete_back(&_vector); heap_caps_free(*handle); *handle = NULL, "Touch pad initialization failed. GPIO initialization failed.");
if (_stats.min_stack_size == 0)
{
_stats.min_stack_size = config->stack_size;
}
(*handle)->debounce_time = config->debounce_time;
ZH_LOGI("Touch pad initialization completed successfully.");
return ESP_OK;
}
esp_err_t zh_ttp229_deinit(zh_ttp229_handle_t **handle) // -V2008
{
ZH_LOGI("Touch pad deinitialization started.");
ZH_ERROR_CHECK(handle != NULL && *handle != NULL, ESP_ERR_INVALID_ARG, NULL, "Touch pad deinitialization failed. Invalid argument.");
ZH_ERROR_CHECK(rmt_disable((*handle)->tx_channel) == ESP_OK, ESP_FAIL, NULL, "Touch pad deinitialization failed. TX channel disable failed.");
ZH_ERROR_CHECK(rmt_disable((*handle)->rx_channel) == ESP_OK, ESP_FAIL, NULL, "Touch pad deinitialization failed. RX channel disable failed.");
ZH_ERROR_CHECK(rmt_del_encoder((*handle)->copy_encoder) == ESP_OK, ESP_FAIL, NULL, "Touch pad deinitialization failed. Delete encoder failed.");
ZH_ERROR_CHECK(rmt_del_channel((*handle)->tx_channel) == ESP_OK, ESP_FAIL, NULL, "Touch pad deinitialization failed. Delete TX channel failed.");
ZH_ERROR_CHECK(rmt_del_channel((*handle)->rx_channel) == ESP_OK, ESP_FAIL, NULL, "Touch pad deinitialization failed. Delete RX channel failed.");
ZH_ERROR_CHECK(gpio_isr_handler_remove((*handle)->sdo_gpio) == ESP_OK, ESP_FAIL, NULL, "Touch pad deinitialization failed. Remove GPIO isr handler failed.");
ZH_ERROR_CHECK(gpio_reset_pin((*handle)->sdo_gpio) == ESP_OK, ESP_FAIL, NULL, "Touch pad deinitialization failed. Reset GPIO failed.");
int32_t index = 0;
ZH_ERROR_CHECK(zh_vector_find_item(&_vector, &(*handle)->device_number, &index) == ESP_ERR_NOT_FOUND, ESP_ERR_INVALID_ARG, NULL, "Touch pad deinitialization failed. Failed to find vector item.");
ZH_ERROR_CHECK(zh_vector_delete_item(&_vector, (uint16_t)index) == ESP_OK, ESP_FAIL, NULL, "Touch pad deinitialization failed. Vector delete item failed.");
uint16_t vector_size = 0;
ZH_ERROR_CHECK(zh_vector_get_size(&_vector, &vector_size) == ESP_OK, ESP_FAIL, NULL, "Touch pad deinitialization failed. Failed to get vector size.");
if (vector_size == 0)
{
vQueueDelete(_queue_handle);
_queue_handle = NULL;
vTaskDelete(zh_ttp229);
zh_ttp229 = NULL;
ZH_ERROR_CHECK(zh_vector_free(&_vector) == ESP_OK, ESP_FAIL, NULL, "Touch pad deinitialization failed. Free vector failed.");
}
heap_caps_free(*handle);
*handle = NULL;
ZH_LOGI("Touch pad deinitialization completed successfully.");
return ESP_OK;
}
const zh_ttp229_stats_t *zh_ttp229_get_stats(void)
{
return &_stats;
}
void zh_ttp229_reset_stats(void)
{
ZH_LOGI("Error statistic reset started.");
_stats.rmt_driver_error = 0;
_stats.event_post_error = 0;
_stats.queue_overflow_error = 0;
_stats.min_stack_size = 0;
ZH_LOGI("Error statistic reset successfully.");
}
static esp_err_t _zh_ttp229_validate_config(const zh_ttp229_init_config_t *config, zh_ttp229_handle_t *handle) // -V2008
{
ZH_ERROR_CHECK(config->task_priority >= 1 && config->stack_size >= configMINIMAL_STACK_SIZE, ESP_ERR_INVALID_ARG, NULL, "Invalid task settings.");
ZH_ERROR_CHECK(config->queue_size >= 1, ESP_ERR_INVALID_ARG, NULL, "Invalid queue size.");
ZH_ERROR_CHECK(config->debounce_time >= 10, ESP_ERR_INVALID_ARG, NULL, "Invalid debounce time.");
ZH_ERROR_CHECK(config->rmt_tx_start_delay >= 15, ESP_ERR_INVALID_ARG, NULL, "Invalid RMT TX start delay.");
ZH_ERROR_CHECK(config->work_mode == ZH_TTP229_8_PAD || config->work_mode == ZH_TTP229_16_PAD, ESP_ERR_INVALID_ARG, NULL, "Invalid touch pad work mode.");
ZH_ERROR_CHECK(config->device_number > 0, ESP_ERR_INVALID_ARG, NULL, "Invalid touch pad number.");
if (_vector != NULL)
{
int32_t index = 0;
ZH_ERROR_CHECK(zh_vector_find_item(&_vector, &config->device_number, &index) == ESP_ERR_NOT_FOUND, ESP_ERR_INVALID_ARG, NULL, "Touch pad number already present.");
}
handle->rmt_tx_start_delay = config->rmt_tx_start_delay;
handle->device_number = config->device_number;
handle->work_mode = config->work_mode;
return ESP_OK;
}
static esp_err_t _zh_ttp229_gpio_init(const zh_ttp229_init_config_t *config, zh_ttp229_handle_t *handle) // -V2008
{
ZH_ERROR_CHECK(config->scl_gpio < GPIO_NUM_MAX && config->sdo_gpio < GPIO_NUM_MAX, ESP_ERR_INVALID_ARG, NULL, "Invalid GPIO number.")
ZH_ERROR_CHECK(config->scl_gpio != config->sdo_gpio, ESP_ERR_INVALID_ARG, NULL, "SCL GPIO and SDO GPIO is same.")
gpio_config_t sdo_config = {
.mode = GPIO_MODE_INPUT,
.pin_bit_mask = (1ULL << config->sdo_gpio),
.intr_type = GPIO_INTR_POSEDGE};
ZH_ERROR_CHECK(gpio_config(&sdo_config) == ESP_OK, ESP_FAIL, NULL, "GPIO initialization failed.");
esp_err_t err = gpio_install_isr_service(ESP_INTR_FLAG_LOWMED);
ZH_ERROR_CHECK(err == ESP_OK || err == ESP_ERR_INVALID_STATE, ESP_FAIL,
{ZH_ERROR_CHECK(gpio_reset_pin(config->sdo_gpio) == ESP_OK, ESP_FAIL, NULL, "Reset GPIO failed.")}, "Failed install isr service.");
ZH_ERROR_CHECK(gpio_isr_handler_add(config->sdo_gpio, _zh_ttp229_isr_handler, handle) == ESP_OK, ESP_FAIL,
{ZH_ERROR_CHECK(gpio_reset_pin(config->sdo_gpio) == ESP_OK, ESP_FAIL, NULL, "Reset GPIO failed.")}, "Interrupt initialization failed.");
handle->sdo_gpio = config->sdo_gpio;
return ESP_OK;
}
static esp_err_t _zh_ttp229_rmt_init(const zh_ttp229_init_config_t *config, zh_ttp229_handle_t *handle) // -V2008
{
rmt_tx_channel_config_t tx_chan_config = {
.clk_src = RMT_CLK_SRC_DEFAULT,
.gpio_num = config->scl_gpio,
#if defined CONFIG_IDF_TARGET_ESP32 || CONFIG_IDF_TARGET_ESP32S2
.mem_block_symbols = 64,
#else
.mem_block_symbols = 48,
#endif
.resolution_hz = 1000000,
.trans_queue_depth = 4,
.flags.init_level = 1,
};
ZH_ERROR_CHECK(rmt_new_tx_channel(&tx_chan_config, &handle->tx_channel) == ESP_OK, ESP_FAIL, NULL, "TX channel creation failed.");
rmt_copy_encoder_config_t copy_encoder_config = {};
ZH_ERROR_CHECK(rmt_new_copy_encoder(&copy_encoder_config, &handle->copy_encoder) == ESP_OK, ESP_FAIL,
{ZH_ERROR_CHECK(rmt_del_channel(handle->tx_channel) == ESP_OK, ESP_FAIL, NULL, "Delete channel failed.")}, "Copy encoder creation failed.");
ZH_ERROR_CHECK(rmt_enable(handle->tx_channel) == ESP_OK, ESP_FAIL,
{ZH_ERROR_CHECK(rmt_del_encoder(handle->copy_encoder) == ESP_OK, ESP_FAIL, NULL, "Delete encoder failed.")};
{ZH_ERROR_CHECK(rmt_del_channel(handle->tx_channel) == ESP_OK, ESP_FAIL, NULL, "Delete channel failed.")}, "Enable TX channel failed.");
rmt_rx_channel_config_t rx_chan_config = {
.clk_src = RMT_CLK_SRC_DEFAULT,
.gpio_num = config->sdo_gpio,
#if defined CONFIG_IDF_TARGET_ESP32 || CONFIG_IDF_TARGET_ESP32S2
.mem_block_symbols = 64,
#else
.mem_block_symbols = 48,
#endif
.resolution_hz = 1000000,
};
ZH_ERROR_CHECK(rmt_new_rx_channel(&rx_chan_config, &handle->rx_channel) == ESP_OK, ESP_FAIL,
{ZH_ERROR_CHECK(rmt_disable(handle->tx_channel) == ESP_OK, ESP_FAIL, NULL, "TX channel disable failed.")};
{ZH_ERROR_CHECK(rmt_del_encoder(handle->copy_encoder) == ESP_OK, ESP_FAIL, NULL, "Delete encoder failed.")};
{ZH_ERROR_CHECK(rmt_del_channel(handle->tx_channel) == ESP_OK, ESP_FAIL, NULL, "Delete TX channel failed.")}, "TX channel creation failed.");
ZH_ERROR_CHECK(rmt_enable(handle->rx_channel) == ESP_OK, ESP_FAIL,
{ZH_ERROR_CHECK(rmt_disable(handle->tx_channel) == ESP_OK, ESP_FAIL, NULL, "TX channel disable failed.")};
{ZH_ERROR_CHECK(rmt_del_encoder(handle->copy_encoder) == ESP_OK, ESP_FAIL, NULL, "Delete encoder failed.")};
{ZH_ERROR_CHECK(rmt_del_channel(handle->tx_channel) == ESP_OK, ESP_FAIL, NULL, "Delete TX channel failed.")};
{ZH_ERROR_CHECK(rmt_del_channel(handle->rx_channel) == ESP_OK, ESP_FAIL, NULL, "Delete RX channel failed.")}, "RX channel creation failed.");
rmt_rx_event_callbacks_t cbs = {
.on_recv_done = _zh_ttp229_rmt_rx_done_callback,
};
ZH_ERROR_CHECK(rmt_rx_register_event_callbacks(handle->rx_channel, &cbs, handle) == ESP_OK, ESP_FAIL,
{ZH_ERROR_CHECK(rmt_disable(handle->tx_channel) == ESP_OK, ESP_FAIL, NULL, "TX channel disable failed.")};
{ZH_ERROR_CHECK(rmt_disable(handle->rx_channel) == ESP_OK, ESP_FAIL, NULL, "RX channel disable failed.")};
{ZH_ERROR_CHECK(rmt_del_encoder(handle->copy_encoder) == ESP_OK, ESP_FAIL, NULL, "Delete encoder failed.")};
{ZH_ERROR_CHECK(rmt_del_channel(handle->tx_channel) == ESP_OK, ESP_FAIL, NULL, "Delete TX channel failed.")};
{ZH_ERROR_CHECK(rmt_del_channel(handle->rx_channel) == ESP_OK, ESP_FAIL, NULL, "Delete RX channel failed.")}, "TX callback registar failed.");
return ESP_OK;
}
static esp_err_t _zh_ttp229_resources_init(const zh_ttp229_init_config_t *config)
{
uint16_t vector_size = 0;
zh_vector_get_size(&_vector, &vector_size);
if (vector_size == 1)
{
_queue_handle = xQueueCreate(config->queue_size, sizeof(zh_ttp229_queue_t));
ZH_ERROR_CHECK(_queue_handle != NULL, ESP_FAIL, NULL, "Failed to create queue.");
}
return ESP_OK;
}
static esp_err_t _zh_ttp229_task_init(const zh_ttp229_init_config_t *config)
{
uint16_t vector_size = 0;
zh_vector_get_size(&_vector, &vector_size);
if (vector_size == 1)
{
ZH_ERROR_CHECK(xTaskCreatePinnedToCore(&_zh_ttp229_isr_processing_task, "zh_ttp229_isr_processing", config->stack_size, NULL, config->task_priority, &zh_ttp229, tskNO_AFFINITY) == pdPASS,
ESP_FAIL, NULL, "Failed to create isr processing task.");
}
return ESP_OK;
}
static void IRAM_ATTR _zh_ttp229_isr_handler(void *arg)
{
zh_ttp229_handle_t *ttp229_handle = (zh_ttp229_handle_t *)arg;
gpio_intr_disable(ttp229_handle->sdo_gpio);
rmt_receive_config_t rx_receive_config = {.signal_range_min_ns = 100, .signal_range_max_ns = 2000000};
// Start RMT reception on SDO to capture touch data
if (rmt_receive(ttp229_handle->rx_channel, &ttp229_handle->rx_symbols, sizeof(ttp229_handle->rx_symbols), &rx_receive_config) != ESP_OK)
{
++_stats.rmt_driver_error;
}
// Toggle SDO: set output low then high to trigger the RMT RX start
gpio_set_direction(ttp229_handle->sdo_gpio, GPIO_MODE_OUTPUT);
gpio_set_level(ttp229_handle->sdo_gpio, 0);
gpio_set_level(ttp229_handle->sdo_gpio, 1);
gpio_set_direction(ttp229_handle->sdo_gpio, GPIO_MODE_INPUT);
// Generate SCL clock pulses via RMT transmit for the configured work mode
rmt_symbol_word_t scl_symbols[ttp229_handle->work_mode];
for (uint8_t i = 0; i < (uint8_t)ttp229_handle->work_mode; ++i)
{
scl_symbols[i] = (rmt_symbol_word_t){.duration0 = 2, .level0 = 0, .duration1 = 2, .level1 = 1};
}
rmt_transmit_config_t tx_transmit_config = {.loop_count = 0, .flags.eot_level = 1, .flags.queue_nonblocking = 1};
if (rmt_transmit(ttp229_handle->tx_channel, ttp229_handle->copy_encoder, scl_symbols, sizeof(scl_symbols), &tx_transmit_config) != ESP_OK)
{
++_stats.rmt_driver_error;
}
portYIELD_FROM_ISR();
}
static void IRAM_ATTR _zh_ttp229_isr_processing_task(void *pvParameter) // -V2008
{
(void)pvParameter;
zh_ttp229_queue_t ttp229_queue = {0};
while (xQueueReceive(_queue_handle, &ttp229_queue, portMAX_DELAY) == pdTRUE)
{
zh_ttp229_handle_t *ttp229_handle = ttp229_queue.handle;
uint8_t pad_number = 0;
// Decode pad number from duration1: each pad has a unique range
// of (rmt_tx_start_delay + offset) values, with offset increasing
// by 2 per pad (pad N uses offset 2*(N-1)+1, ±1 tolerance)
if ((ttp229_handle->rx_symbols.duration1 == (ttp229_handle->rmt_tx_start_delay - 1)) ||
(ttp229_handle->rx_symbols.duration1 == (ttp229_handle->rmt_tx_start_delay)) ||
(ttp229_handle->rx_symbols.duration1 == (ttp229_handle->rmt_tx_start_delay + 1)))
{
pad_number = 1;
}
else if ((ttp229_handle->rx_symbols.duration1 == (ttp229_handle->rmt_tx_start_delay + 3)) ||
(ttp229_handle->rx_symbols.duration1 == (ttp229_handle->rmt_tx_start_delay + 4)) ||
(ttp229_handle->rx_symbols.duration1 == (ttp229_handle->rmt_tx_start_delay + 5)))
{
pad_number = 2;
}
else if ((ttp229_handle->rx_symbols.duration1 == (ttp229_handle->rmt_tx_start_delay + 7)) ||
(ttp229_handle->rx_symbols.duration1 == (ttp229_handle->rmt_tx_start_delay + 8)) ||
(ttp229_handle->rx_symbols.duration1 == (ttp229_handle->rmt_tx_start_delay + 9)))
{
pad_number = 3;
}
else if ((ttp229_handle->rx_symbols.duration1 == (ttp229_handle->rmt_tx_start_delay + 11)) ||
(ttp229_handle->rx_symbols.duration1 == (ttp229_handle->rmt_tx_start_delay + 12)) ||
(ttp229_handle->rx_symbols.duration1 == (ttp229_handle->rmt_tx_start_delay + 13)))
{
pad_number = 4;
}
else if ((ttp229_handle->rx_symbols.duration1 == (ttp229_handle->rmt_tx_start_delay + 15)) ||
(ttp229_handle->rx_symbols.duration1 == (ttp229_handle->rmt_tx_start_delay + 16)) ||
(ttp229_handle->rx_symbols.duration1 == (ttp229_handle->rmt_tx_start_delay + 17)))
{
pad_number = 5;
}
else if ((ttp229_handle->rx_symbols.duration1 == (ttp229_handle->rmt_tx_start_delay + 19)) ||
(ttp229_handle->rx_symbols.duration1 == (ttp229_handle->rmt_tx_start_delay + 20)) ||
(ttp229_handle->rx_symbols.duration1 == (ttp229_handle->rmt_tx_start_delay + 21)))
{
pad_number = 6;
}
else if ((ttp229_handle->rx_symbols.duration1 == (ttp229_handle->rmt_tx_start_delay + 23)) ||
(ttp229_handle->rx_symbols.duration1 == (ttp229_handle->rmt_tx_start_delay + 24)) ||
(ttp229_handle->rx_symbols.duration1 == (ttp229_handle->rmt_tx_start_delay + 25)))
{
pad_number = 7;
}
else if ((ttp229_handle->rx_symbols.duration1 == (ttp229_handle->rmt_tx_start_delay + 27)) ||
(ttp229_handle->rx_symbols.duration1 == (ttp229_handle->rmt_tx_start_delay + 28)) ||
(ttp229_handle->rx_symbols.duration1 == (ttp229_handle->rmt_tx_start_delay + 29)))
{
pad_number = 8;
}
else if ((ttp229_handle->rx_symbols.duration1 == (ttp229_handle->rmt_tx_start_delay + 31)) ||
(ttp229_handle->rx_symbols.duration1 == (ttp229_handle->rmt_tx_start_delay + 32)) ||
(ttp229_handle->rx_symbols.duration1 == (ttp229_handle->rmt_tx_start_delay + 33)))
{
pad_number = 9;
}
else if ((ttp229_handle->rx_symbols.duration1 == (ttp229_handle->rmt_tx_start_delay + 35)) ||
(ttp229_handle->rx_symbols.duration1 == (ttp229_handle->rmt_tx_start_delay + 36)) ||
(ttp229_handle->rx_symbols.duration1 == (ttp229_handle->rmt_tx_start_delay + 37)))
{
pad_number = 10;
}
else if ((ttp229_handle->rx_symbols.duration1 == (ttp229_handle->rmt_tx_start_delay + 39)) ||
(ttp229_handle->rx_symbols.duration1 == (ttp229_handle->rmt_tx_start_delay + 40)) ||
(ttp229_handle->rx_symbols.duration1 == (ttp229_handle->rmt_tx_start_delay + 41)))
{
pad_number = 11;
}
else if ((ttp229_handle->rx_symbols.duration1 == (ttp229_handle->rmt_tx_start_delay + 43)) ||
(ttp229_handle->rx_symbols.duration1 == (ttp229_handle->rmt_tx_start_delay + 44)) ||
(ttp229_handle->rx_symbols.duration1 == (ttp229_handle->rmt_tx_start_delay + 45)))
{
pad_number = 12;
}
else if ((ttp229_handle->rx_symbols.duration1 == (ttp229_handle->rmt_tx_start_delay + 47)) ||
(ttp229_handle->rx_symbols.duration1 == (ttp229_handle->rmt_tx_start_delay + 48)) ||
(ttp229_handle->rx_symbols.duration1 == (ttp229_handle->rmt_tx_start_delay + 49)))
{
pad_number = 13;
}
else if ((ttp229_handle->rx_symbols.duration1 == (ttp229_handle->rmt_tx_start_delay + 51)) ||
(ttp229_handle->rx_symbols.duration1 == (ttp229_handle->rmt_tx_start_delay + 52)) ||
(ttp229_handle->rx_symbols.duration1 == (ttp229_handle->rmt_tx_start_delay + 53)))
{
pad_number = 14;
}
else if ((ttp229_handle->rx_symbols.duration1 == (ttp229_handle->rmt_tx_start_delay + 55)) ||
(ttp229_handle->rx_symbols.duration1 == (ttp229_handle->rmt_tx_start_delay + 56)) ||
(ttp229_handle->rx_symbols.duration1 == (ttp229_handle->rmt_tx_start_delay + 57)))
{
pad_number = 15;
}
else if ((ttp229_handle->rx_symbols.duration1 == (ttp229_handle->rmt_tx_start_delay + 59)) ||
(ttp229_handle->rx_symbols.duration1 == (ttp229_handle->rmt_tx_start_delay + 60)) ||
(ttp229_handle->rx_symbols.duration1 == (ttp229_handle->rmt_tx_start_delay + 61)))
{
pad_number = 16;
}
if (pad_number != 0)
{
zh_ttp229_event_on_isr_t ttp229_data = {0};
ttp229_data.pad_number = pad_number;
ttp229_data.device_number = ttp229_handle->device_number;
ZH_ERROR_CHECK_CONT(esp_event_post(ZH_TTP229, 0, &ttp229_data, sizeof(zh_ttp229_event_on_isr_t), 1000 / portTICK_PERIOD_MS) == ESP_OK, ++_stats.event_post_error, "Touch pad isr processing failed. Failed to post interrupt event.");
}
vTaskDelay(ttp229_handle->debounce_time / portTICK_PERIOD_MS);
gpio_intr_enable(ttp229_handle->sdo_gpio);
_stats.min_stack_size = (uint32_t)uxTaskGetStackHighWaterMark(NULL);
}
vTaskDelete(NULL);
}
static bool IRAM_ATTR _zh_ttp229_rmt_rx_done_callback(rmt_channel_handle_t channel, const rmt_rx_done_event_data_t *edata, void *user_data)
{
(void)edata;
zh_ttp229_handle_t *ttp229_handle = (zh_ttp229_handle_t *)user_data;
zh_ttp229_queue_t ttp229_queue = {0};
ttp229_queue.handle = ttp229_handle;
BaseType_t xHigherPriorityTaskWoken = pdFALSE;
if (xQueueSendFromISR(_queue_handle, &ttp229_queue, &xHigherPriorityTaskWoken) != pdTRUE)
{
++_stats.queue_overflow_error;
}
if (xHigherPriorityTaskWoken == pdTRUE)
{
return true;
}
return false;
}
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