Freenove ESP32 - Page 118

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116
Chapter 11 Touch
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touch_pad_intr_enable();
xTaskCreateUniversal(task_Touch, "task_Touch", 4096, NULL, 1, NULL, 1);
}
uint8_t touchMechineStatus = 0;
uint32_t t0 = millis(), // start time point
t1 = 0, // update time point
t2 = 0, // release time
t3 = 0; // pressed time
void task_TouchPad(void *pvParameters) {
switch (touchMechineStatus) {
case 0: // Idle , Wait for the button to press.
if (touchPadVal) {
t0 = millis();
t1 = t0;
touchPadVal = false;
touchMechineStatus = 1;
}
break;
case 1: // short press or long press ?
if (touchPadVal) {
t1 = millis();
touchPadVal = false;
}
t2 = millis() - t1; // Time since the last press signal was detected
t3 = t1 - t0; // calculate pressed time.
if (t3 > 700) // long pressed
{
Serial.printf("long press: %dms\n", t3);
touchMechineStatus = 3; // wait release
}
if (t2 > 50) // release time > 50, press time < 700, short press, enter short pressed state
{
touchMechineStatus = 2;
}
break;
case 2: // short press
Serial.printf("short press: %dms\n", t3);
touchMechineStatus = 0;
break;
case 3: // Wait for release after long press.
if (touchPadVal) {
t1 = millis();