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Driver(touch): fix touch sensor driver for esp32s2.

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1.update touch sensor driver for esp32s2;
2.update unit test for touch sensor;
3.update register files about touch sensor;
This commit is contained in:
fuzhibo
2020-02-18 20:29:20 +08:00
parent 4a4db96729
commit 340563f479
40 changed files with 5005 additions and 834 deletions
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56
examples/peripherals/touch_pad_interrupt/main/esp32s2/tp_interrupt_main.c
View File

@@ -11,7 +11,6 @@
#include "freertos/task.h"
#include "freertos/queue.h"
#include "esp_log.h"
#include "driver/touch_pad.h"
#include "soc/rtc_periph.h"
#include "soc/sens_periph.h"
@@ -29,20 +28,21 @@ typedef struct touch_msg {
#define TOUCH_BUTTON_NUM 4
#define TOUCH_BUTTON_WATERPROOF_ENABLE 1
#define TOUCH_BUTTON_DENOISE_ENABLE 1
#define TOUCH_CHANGE_CONFIG 0
static const touch_pad_t button[TOUCH_BUTTON_NUM] = {
TOUCH_PAD_NUM7, // 'SELECT' button.
TOUCH_PAD_NUM9, // 'MENU' button.
TOUCH_PAD_NUM11, // 'BACK' button.
TOUCH_PAD_NUM13, // Guard ring for waterproof design.
// if this pad be touched, other pads no response.
// If this pad be touched, other pads no response.
};
/*
* Touch threshold. The threshold determines the sensitivity of the touch.
* This threshold is derived by testing changes in readings from different touch channels.
* If (raw_data - baseline) > baseline * threshold, the pad be actived.
* If (raw_data - baseline) < baseline * threshold, the pad be inactived.
* If (raw_data - baseline) > baseline * threshold, the pad be activated.
* If (raw_data - baseline) < baseline * threshold, the pad be inactivated.
*/
static const float button_threshold[TOUCH_BUTTON_NUM] = {
0.2, // 20%.
@@ -64,9 +64,6 @@ static void touchsensor_interrupt_cb(void *arg)
evt.pad_status = touch_pad_get_status();
evt.pad_num = touch_pad_get_current_meas_channel();
if (evt.intr_mask & TOUCH_PAD_INTR_MASK_DONE) {
touch_pad_filter_read_baseline(evt.pad_num, &evt.pad_val);
}
xQueueSendFromISR(que_touch, &evt, &task_awoken);
if (task_awoken == pdTRUE) {
portYIELD_FROM_ISR();
@@ -81,7 +78,7 @@ static void tp_example_set_thresholds(void)
touch_pad_filter_read_baseline(button[i], &touch_value);
//set interrupt threshold.
touch_pad_set_thresh(button[i], touch_value * button_threshold[i]);
ESP_LOGI(TAG, "test init: touch pad [%d] base %d, thresh %d", \
ESP_LOGI(TAG, "touch pad [%d] base %d, thresh %d", \
button[i], touch_value, (uint32_t)(touch_value * button_threshold[i]));
}
}
@@ -97,10 +94,10 @@ static void touchsensor_filter_set(touch_filter_mode_t mode)
.noise_neg_thr = 0, // 50%
.neg_noise_limit = 10, // 10 time count.
.jitter_step = 4, // use for jitter mode.
.smh_lvl = TOUCH_PAD_SMOOTH_IIR_2,
};
touch_pad_filter_set_config(&filter_info);
touch_pad_filter_enable();
touch_pad_filter_reset_baseline(TOUCH_PAD_MAX);
ESP_LOGI(TAG, "touch pad filter init");
}
@@ -109,7 +106,7 @@ static void tp_example_read_task(void *pvParameter)
touch_event_t evt = {0};
static uint8_t guard_mode_flag = 0;
/* Wait touch sensor init done */
vTaskDelay(100 / portTICK_RATE_MS);
vTaskDelay(50 / portTICK_RATE_MS);
tp_example_set_thresholds();
while (1) {
@@ -121,10 +118,10 @@ static void tp_example_read_task(void *pvParameter)
/* if guard pad be touched, other pads no response. */
if (evt.pad_num == button[3]) {
guard_mode_flag = 1;
ESP_LOGW(TAG, "TouchSensor [%d] be actived, enter guard mode", evt.pad_num);
ESP_LOGW(TAG, "TouchSensor [%d] be activated, enter guard mode", evt.pad_num);
} else {
if (guard_mode_flag == 0) {
ESP_LOGI(TAG, "TouchSensor [%d] be actived, status mask 0x%x", evt.pad_num, evt.pad_status);
ESP_LOGI(TAG, "TouchSensor [%d] be inactivated, status mask 0x%x", evt.pad_num, evt.pad_status);
} else {
ESP_LOGW(TAG, "In guard mode. No response");
}
@@ -134,15 +131,20 @@ static void tp_example_read_task(void *pvParameter)
/* if guard pad be touched, other pads no response. */
if (evt.pad_num == button[3]) {
guard_mode_flag = 0;
ESP_LOGW(TAG, "TouchSensor [%d] be actived, exit guard mode", evt.pad_num);
ESP_LOGW(TAG, "TouchSensor [%d] be activated, exit guard mode", evt.pad_num);
} else {
if (guard_mode_flag == 0) {
ESP_LOGI(TAG, "TouchSensor [%d] be inactived, status mask 0x%x", evt.pad_num, evt.pad_status);
ESP_LOGI(TAG, "TouchSensor [%d] be inactivated, status mask 0x%x", evt.pad_num, evt.pad_status);
}
}
}
if (evt.intr_mask & TOUCH_PAD_INTR_MASK_DONE) {
ESP_LOGI(TAG, "TouchSensor [%d] measure done, raw data %d", evt.pad_num, evt.pad_val);
if (evt.intr_mask & TOUCH_PAD_INTR_MASK_SCAN_DONE) {
ESP_LOGI(TAG, "The touch sensor group measurement is done [%d].", evt.pad_num);
}
if (evt.intr_mask & TOUCH_PAD_INTR_MASK_TIMEOUT) {
/* Add your exception handling in here. */
ESP_LOGI(TAG, "Touch sensor channel %d measure timeout. Skip this exception channel!!", evt.pad_num);
touch_pad_timeout_resume(); // Point on the next channel to measure.
}
}
}
@@ -159,21 +161,24 @@ void app_main(void)
for (int i = 0; i < TOUCH_BUTTON_NUM; i++) {
touch_pad_config(button[i]);
}
#if 0
#if TOUCH_CHANGE_CONFIG
/* If you want change the touch sensor default setting, please write here(after initialize). There are examples: */
touch_pad_set_meas_time(TOUCH_PAD_SLEEP_CYCLE_DEFAULT, TOUCH_PAD_SLEEP_CYCLE_DEFAULT);
touch_pad_set_voltage(TOUCH_PAD_HIGH_VOLTAGE_THRESHOLD, TOUCH_PAD_LOW_VOLTAGE_THRESHOLD, TOUCH_PAD_ATTEN_VOLTAGE_THRESHOLD);
touch_pad_set_inactive_connect(TOUCH_PAD_INACTIVE_CONNECT_DEFAULT);
touch_pad_set_idle_channel_connect(TOUCH_PAD_IDLE_CH_CONNECT_DEFAULT);
for (int i = 0; i < TOUCH_BUTTON_NUM; i++) {
touch_pad_set_cnt_mode(i, TOUCH_PAD_SLOPE_DEFAULT, TOUCH_PAD_TIE_OPT_DEFAULT);
}
#endif
#if TOUCH_BUTTON_DENOISE_ENABLE
/* Denoise setting at TouchSensor 0. */
touch_pad_denoise_t denoise = {
/* The bits to be cancelled are determined according to the noise level. */
.grade = TOUCH_PAD_DENOISE_BIT4,
.cap_level = TOUCH_PAD_DENOISE_CAP_L7,
/* By adjusting the parameters, the reading of T0 should be approximated to the reading of the measured channel. */
.cap_level = TOUCH_PAD_DENOISE_CAP_L4,
};
touch_pad_denoise_set_config(&denoise);
touch_pad_denoise_enable();
@@ -184,8 +189,10 @@ void app_main(void)
/* Waterproof function */
touch_pad_waterproof_t waterproof = {
.guard_ring_pad = button[3], // If no ring pad, set 0;
/* It depends on the number of the parasitic capacitance of the shield pad. */
.shield_driver = TOUCH_PAD_SHIELD_DRV_L0, //40pf
/* It depends on the number of the parasitic capacitance of the shield pad.
Based on the touch readings of T14 and T0, estimate the size of the parasitic capacitance on T14
and set the parameters of the appropriate hardware. */
.shield_driver = TOUCH_PAD_SHIELD_DRV_L2,
};
touch_pad_waterproof_set_config(&waterproof);
touch_pad_waterproof_enable();
@@ -193,11 +200,12 @@ void app_main(void)
#endif
/* Filter setting */
touchsensor_filter_set(TOUCH_PAD_FILTER_IIR_8);
touchsensor_filter_set(TOUCH_PAD_FILTER_IIR_16);
touch_pad_timeout_set(true, SOC_TOUCH_PAD_THRESHOLD_MAX);
/* Register touch interrupt ISR, enable intr type. */
touch_pad_isr_register(touchsensor_interrupt_cb, NULL, TOUCH_PAD_INTR_MASK_ALL);
touch_pad_intr_enable(TOUCH_PAD_INTR_MASK_ACTIVE | TOUCH_PAD_INTR_MASK_INACTIVE);
// touch_pad_intr_enable(TOUCH_PAD_INTR_MASK_DONE); // Use for debug
/* If you have other touch algorithm, you can get the measured value after the `TOUCH_PAD_INTR_MASK_SCAN_DONE` interrupt is generated. */
touch_pad_intr_enable(TOUCH_PAD_INTR_MASK_ACTIVE | TOUCH_PAD_INTR_MASK_INACTIVE | TOUCH_PAD_INTR_MASK_TIMEOUT);
/* Enable touch sensor clock. Work mode is "timer trigger". */
touch_pad_set_fsm_mode(TOUCH_FSM_MODE_TIMER);

19
examples/peripherals/touch_pad_read/main/esp32s2/tp_read_main.c
View File

@@ -13,13 +13,14 @@
#include "esp_log.h"
#define TOUCH_BUTTON_NUM 14
#define TOUCH_CHANGE_CONFIG 0
static const char * TAG = "touch read";
static const char *TAG = "touch read";
static const touch_pad_t button[TOUCH_BUTTON_NUM] = {
TOUCH_PAD_NUM1,
TOUCH_PAD_NUM2,
TOUCH_PAD_NUM3,
TOUCH_PAD_NUM4,
TOUCH_PAD_NUM4,
TOUCH_PAD_NUM5,
TOUCH_PAD_NUM6,
TOUCH_PAD_NUM7,
@@ -39,7 +40,7 @@ static const touch_pad_t button[TOUCH_BUTTON_NUM] = {
static void tp_example_read_task(void *pvParameter)
{
uint32_t touch_value;
/* Wait touch sensor init done */
vTaskDelay(100 / portTICK_RATE_MS);
printf("Touch Sensor read, the output format is: \nTouchpad num:[raw data]\n\n");
@@ -61,20 +62,20 @@ void app_main(void)
for (int i = 0; i < TOUCH_BUTTON_NUM; i++) {
touch_pad_config(button[i]);
}
#if 0
#if TOUCH_CHANGE_CONFIG
/* If you want change the touch sensor default setting, please write here(after initialize). There are examples: */
touch_pad_set_meas_time(TOUCH_PAD_SLEEP_CYCLE_DEFAULT, TOUCH_PAD_SLEEP_CYCLE_DEFAULT);
touch_pad_set_voltage(TOUCH_PAD_HIGH_VOLTAGE_THRESHOLD, TOUCH_PAD_LOW_VOLTAGE_THRESHOLD, TOUCH_PAD_ATTEN_VOLTAGE_THRESHOLD);
touch_pad_set_inactive_connect(TOUCH_PAD_INACTIVE_CONNECT_DEFAULT);
touch_pad_set_idle_channel_connect(TOUCH_PAD_IDLE_CH_CONNECT_DEFAULT);
for (int i = 0; i < TOUCH_BUTTON_NUM; i++) {
touch_pad_set_cnt_mode(i, TOUCH_PAD_SLOPE_DEFAULT, TOUCH_PAD_TIE_OPT_DEFAULT);
}
#endif
/* Denoise setting at TouchSensor 0. */
touch_pad_denoise_t denoise = {
/* The bits to be cancelled are determined according to the noise level. */
.grade = TOUCH_PAD_DENOISE_BIT4,
.cap_level = TOUCH_PAD_DENOISE_CAP_L7,
/* The bits to be cancelled are determined according to the noise level. */
.grade = TOUCH_PAD_DENOISE_BIT4,
.cap_level = TOUCH_PAD_DENOISE_CAP_L4,
};
touch_pad_denoise_set_config(&denoise);
touch_pad_denoise_enable();
@@ -83,7 +84,7 @@ void app_main(void)
/* Enable touch sensor clock. Work mode is "timer trigger". */
touch_pad_set_fsm_mode(TOUCH_FSM_MODE_TIMER);
touch_pad_fsm_start();
/* Start task to read values by pads. */
xTaskCreate(&tp_example_read_task, "touch_pad_read_task", 2048, NULL, 5, NULL);
}