Merge pull request #3738 from microDev1/fix-touch

ESP32S2: Fix multiple touchpad don't work simultaneously

Author: tannewt

ports/esp32s2/common-hal/touchio/TouchIn.c

@@ -25,10 +25,19 @@
  */
 
 #include "shared-bindings/touchio/TouchIn.h"
-#include "py/runtime.h"
 
+#include "py/runtime.h"
 #include "driver/touch_pad.h"
 
+bool touch_inited = false;
+
+void touchin_reset(void) {
+    if (touch_inited) {
+        touch_pad_deinit();
+        touch_inited = false;
+    }
+}
+
 static uint16_t get_raw_reading(touchio_touchin_obj_t *self) {
     uint32_t touch_value;
     touch_pad_read_raw_data((touch_pad_t)self->pin->touch_channel, &touch_value);
@@ -45,11 +54,14 @@ void common_hal_touchio_touchin_construct(touchio_touchin_obj_t* self,
     }
     claim_pin(pin);
 
-    touch_pad_init();
-    touch_pad_config((touch_pad_t)pin->touch_channel);
+    if (!touch_inited) {
+        touch_pad_init();
+        touch_pad_set_fsm_mode(TOUCH_FSM_MODE_TIMER);
+        touch_pad_fsm_start();
+        touch_inited = true;
+    }
 
-    touch_pad_set_fsm_mode(TOUCH_FSM_MODE_TIMER);
-    touch_pad_fsm_start();
+    touch_pad_config((touch_pad_t)pin->touch_channel);
 
     // wait for "raw data" to reset
     mp_hal_delay_ms(10);
@@ -73,14 +85,12 @@ void common_hal_touchio_touchin_deinit(touchio_touchin_obj_t* self) {
     if (common_hal_touchio_touchin_deinited(self)) {
         return;
     }
-    touch_pad_deinit();
     reset_pin_number(self->pin->touch_channel);
     self->pin = NULL;
 }
 
 bool common_hal_touchio_touchin_get_value(touchio_touchin_obj_t *self) {
-    uint16_t reading = get_raw_reading(self);
-    return reading > self->threshold;
+    return get_raw_reading(self) > self->threshold;
 }
 
 uint16_t common_hal_touchio_touchin_get_raw_value(touchio_touchin_obj_t *self) {

ports/esp32s2/supervisor/port.c

@@ -44,6 +44,7 @@
 #include "common-hal/ps2io/Ps2.h"
 #include "common-hal/pulseio/PulseIn.h"
 #include "common-hal/pwmio/PWMOut.h"
+#include "common-hal/touchio/TouchIn.h"
 #include "common-hal/watchdog/WatchDogTimer.h"
 #include "common-hal/wifi/__init__.h"
 #include "supervisor/memory.h"
@@ -146,6 +147,10 @@ void reset_port(void) {
     rtc_reset();
 #endif
 
+#if CIRCUITPY_TOUCHIO_USE_NATIVE
+    touchin_reset();
+#endif
+
 #if CIRCUITPY_WATCHDOG
     watchdog_reset();
 #endif