90 lines
2.9 KiB
C
90 lines
2.9 KiB
C
/* Touch Pad Read Example
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This example code is in the Public Domain (or CC0 licensed, at your option.)
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Unless required by applicable law or agreed to in writing, this
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software is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
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CONDITIONS OF ANY KIND, either express or implied.
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*/
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#include <stdio.h>
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#include "freertos/FreeRTOS.h"
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#include "freertos/task.h"
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#include "driver/touch_pad.h"
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#include "esp_log.h"
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#define TOUCH_BUTTON_NUM 14
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static const char * TAG = "touch read";
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static const touch_pad_t button[TOUCH_BUTTON_NUM] = {
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TOUCH_PAD_NUM1,
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TOUCH_PAD_NUM2,
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TOUCH_PAD_NUM3,
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TOUCH_PAD_NUM4,
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TOUCH_PAD_NUM5,
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TOUCH_PAD_NUM6,
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TOUCH_PAD_NUM7,
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TOUCH_PAD_NUM8,
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TOUCH_PAD_NUM9,
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TOUCH_PAD_NUM10,
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TOUCH_PAD_NUM11,
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TOUCH_PAD_NUM12,
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TOUCH_PAD_NUM13,
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TOUCH_PAD_NUM14
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};
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/*
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Read values sensed at all available touch pads.
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Print out values in a loop on a serial monitor.
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*/
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static void tp_example_read_task(void *pvParameter)
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{
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uint32_t touch_value;
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/* Wait touch sensor init done */
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vTaskDelay(100 / portTICK_RATE_MS);
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printf("Touch Sensor read, the output format is: \nTouchpad num:[raw data]\n\n");
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while (1) {
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for (int i = 0; i < TOUCH_BUTTON_NUM; i++) {
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touch_pad_read_raw_data(button[i], &touch_value); // read raw data.
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printf("T%d: [%4d] ", button[i], touch_value);
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}
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printf("\n");
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vTaskDelay(200 / portTICK_PERIOD_MS);
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}
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}
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void app_main(void)
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{
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/* Initialize touch pad peripheral. */
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touch_pad_init();
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for (int i = 0; i < TOUCH_BUTTON_NUM; i++) {
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touch_pad_config(button[i]);
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}
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#if 0
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/* If you want change the touch sensor default setting, please write here(after initialize). There are examples: */
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touch_pad_set_meas_time(TOUCH_PAD_SLEEP_CYCLE_DEFAULT, TOUCH_PAD_SLEEP_CYCLE_DEFAULT);
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touch_pad_set_voltage(TOUCH_PAD_HIGH_VOLTAGE_THRESHOLD, TOUCH_PAD_LOW_VOLTAGE_THRESHOLD, TOUCH_PAD_ATTEN_VOLTAGE_THRESHOLD);
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touch_pad_set_inactive_connect(TOUCH_PAD_INACTIVE_CONNECT_DEFAULT);
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for (int i = 0; i < TOUCH_BUTTON_NUM; i++) {
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touch_pad_set_cnt_mode(i, TOUCH_PAD_SLOPE_DEFAULT, TOUCH_PAD_TIE_OPT_DEFAULT);
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}
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#endif
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/* Denoise setting at TouchSensor 0. */
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touch_pad_denoise_t denoise = {
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/* The bits to be cancelled are determined according to the noise level. */
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.grade = TOUCH_PAD_DENOISE_BIT4,
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.cap_level = TOUCH_PAD_DENOISE_CAP_L7,
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};
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touch_pad_denoise_set_config(&denoise);
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touch_pad_denoise_enable();
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ESP_LOGI(TAG, "Denoise function init");
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/* Enable touch sensor clock. Work mode is "timer trigger". */
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touch_pad_set_fsm_mode(TOUCH_FSM_MODE_TIMER);
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touch_pad_fsm_start();
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/* Start task to read values by pads. */
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xTaskCreate(&tp_example_read_task, "touch_pad_read_task", 2048, NULL, 5, NULL);
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}
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