esp32: Fix.

Author: Vincent1-python

ports/esp32/machine_touchpad.c

@@ -186,24 +186,22 @@ static mp_obj_t mtp_make_new(const mp_obj_type_t *type, size_t n_args, size_t n_
     }
     mp_raise_ValueError(MP_ERROR_TEXT("Touch pad error"));
 }
-
+#if SOC_TOUCH_SENSOR_VERSION == 1 || SOC_TOUCH_SENSOR_VERSION == 2
 static mp_obj_t mtp_config(mp_obj_t self_in, mp_obj_t value_in) {
     mtp_obj_t *self = self_in;
     #if SOC_TOUCH_SENSOR_VERSION == 1
     uint16_t value = mp_obj_get_int(value_in);
     esp_err_t err = touch_pad_config(self->touchpad_id, value);
     #elif SOC_TOUCH_SENSOR_VERSION == 2
     esp_err_t err = touch_pad_config(self->touchpad_id);
-    #elif SOC_TOUCH_SENSOR_VERSION == 3
-    esp_err_t err = ESP_OK;
     #endif
     if (err == ESP_OK) {
         return mp_const_none;
     }
     mp_raise_ValueError(MP_ERROR_TEXT("Touch pad error"));
 }
 MP_DEFINE_CONST_FUN_OBJ_2(mtp_config_obj, mtp_config);
-
+#endif
 static mp_obj_t mtp_read(mp_obj_t self_in) {
     mtp_obj_t *self = self_in;
     #if SOC_TOUCH_SENSOR_VERSION == 1
@@ -226,7 +224,9 @@ MP_DEFINE_CONST_FUN_OBJ_1(mtp_read_obj, mtp_read);
 
 static const mp_rom_map_elem_t mtp_locals_dict_table[] = {
     // instance methods
+    #if SOC_TOUCH_SENSOR_VERSION == 1 || SOC_TOUCH_SENSOR_VERSION == 2
     { MP_ROM_QSTR(MP_QSTR_config), MP_ROM_PTR(&mtp_config_obj) },
+    #endif
     { MP_ROM_QSTR(MP_QSTR_read), MP_ROM_PTR(&mtp_read_obj) },
 };