Add reset() to display busses to detect whether it works

6 files changed, 51 insertions, 3 deletions

diff --git a/shared-bindings/displayio/FourWire.c b/shared-bindings/displayio/FourWire.c
index efd553e2e..c69623344 100644
--- a/shared-bindings/displayio/FourWire.c
+++ b/shared-bindings/displayio/FourWire.c
@@ -103,6 +103,21 @@ STATIC mp_obj_t displayio_fourwire_make_new(const mp_obj_type_t *type, size_t n_
     return self;
 }
 
+//|   .. method:: reset()
+//|
+//|     Performs a hardware reset via the reset pin. Raises an exception if called when no reset pin
+//|     is available.
+//|
+STATIC mp_obj_t displayio_fourwire_obj_reset(mp_obj_t self_in) {
+    displayio_fourwire_obj_t *self = self_in;
+
+    if (!common_hal_displayio_fourwire_reset(self)) {
+        mp_raise_RuntimeError(translate("no reset pin available"));
+    }
+    return mp_const_none;
+}
+MP_DEFINE_CONST_FUN_OBJ_1(displayio_fourwire_reset_obj, displayio_fourwire_obj_reset);
+
 //|   .. method:: send(command, data, *, toggle_every_byte=False)
 //|
 //|     Sends the given command value followed by the full set of data. Display state, such as
@@ -140,6 +155,7 @@ STATIC mp_obj_t displayio_fourwire_obj_send(size_t n_args, const mp_obj_t *pos_a
 MP_DEFINE_CONST_FUN_OBJ_KW(displayio_fourwire_send_obj, 3, displayio_fourwire_obj_send);
 
 STATIC const mp_rom_map_elem_t displayio_fourwire_locals_dict_table[] = {
+    { MP_ROM_QSTR(MP_QSTR_reset), MP_ROM_PTR(&displayio_fourwire_reset_obj) },
     { MP_ROM_QSTR(MP_QSTR_send), MP_ROM_PTR(&displayio_fourwire_send_obj) },
 };
 STATIC MP_DEFINE_CONST_DICT(displayio_fourwire_locals_dict, displayio_fourwire_locals_dict_table);
diff --git a/shared-bindings/displayio/FourWire.h b/shared-bindings/displayio/FourWire.h
index ee69a63ac..9c71d63cc 100644
--- a/shared-bindings/displayio/FourWire.h
+++ b/shared-bindings/displayio/FourWire.h
@@ -40,7 +40,7 @@ void common_hal_displayio_fourwire_construct(displayio_fourwire_obj_t* self,
 
 void common_hal_displayio_fourwire_deinit(displayio_fourwire_obj_t* self);
 
-void common_hal_displayio_fourwire_reset(mp_obj_t self);
+bool common_hal_displayio_fourwire_reset(mp_obj_t self);
 bool common_hal_displayio_fourwire_bus_free(mp_obj_t self);
 
 bool common_hal_displayio_fourwire_begin_transaction(mp_obj_t self);
diff --git a/shared-bindings/displayio/I2CDisplay.c b/shared-bindings/displayio/I2CDisplay.c
index 4428e8dbb..4de5e83ef 100644
--- a/shared-bindings/displayio/I2CDisplay.c
+++ b/shared-bindings/displayio/I2CDisplay.c
@@ -95,6 +95,21 @@ STATIC mp_obj_t displayio_i2cdisplay_make_new(const mp_obj_type_t *type, size_t
     return self;
 }
 
+//|   .. method:: reset()
+//|
+//|     Performs a hardware reset via the reset pin. Raises an exception if called when no reset pin
+//|     is available.
+//|
+STATIC mp_obj_t displayio_i2cdisplay_obj_reset(mp_obj_t self_in) {
+    displayio_i2cdisplay_obj_t *self = self_in;
+
+    if (!common_hal_displayio_i2cdisplay_reset(self)) {
+        mp_raise_RuntimeError(translate("no reset pin available"));
+    }
+    return mp_const_none;
+}
+MP_DEFINE_CONST_FUN_OBJ_1(displayio_i2cdisplay_reset_obj, displayio_i2cdisplay_obj_reset);
+
 //|   .. method:: send(command, data)
 //|
 //|     Sends the given command value followed by the full set of data. Display state, such as
@@ -124,6 +139,7 @@ STATIC mp_obj_t displayio_i2cdisplay_obj_send(mp_obj_t self, mp_obj_t command_ob
 MP_DEFINE_CONST_FUN_OBJ_3(displayio_i2cdisplay_send_obj, displayio_i2cdisplay_obj_send);
 
 STATIC const mp_rom_map_elem_t displayio_i2cdisplay_locals_dict_table[] = {
+    { MP_ROM_QSTR(MP_QSTR_reset), MP_ROM_PTR(&displayio_i2cdisplay_reset_obj) },
     { MP_ROM_QSTR(MP_QSTR_send), MP_ROM_PTR(&displayio_i2cdisplay_send_obj) },
 };
 STATIC MP_DEFINE_CONST_DICT(displayio_i2cdisplay_locals_dict, displayio_i2cdisplay_locals_dict_table);
diff --git a/shared-bindings/displayio/I2CDisplay.h b/shared-bindings/displayio/I2CDisplay.h
index 6a75fc488..683cff383 100644
--- a/shared-bindings/displayio/I2CDisplay.h
+++ b/shared-bindings/displayio/I2CDisplay.h
@@ -37,7 +37,7 @@ void common_hal_displayio_i2cdisplay_construct(displayio_i2cdisplay_obj_t* self,
 
 void common_hal_displayio_i2cdisplay_deinit(displayio_i2cdisplay_obj_t* self);
 
-void common_hal_displayio_i2cdisplay_reset(mp_obj_t self);
+bool common_hal_displayio_i2cdisplay_reset(mp_obj_t self);
 bool common_hal_displayio_i2cdisplay_bus_free(mp_obj_t self);
 
 bool common_hal_displayio_i2cdisplay_begin_transaction(mp_obj_t self);
diff --git a/shared-bindings/displayio/ParallelBus.c b/shared-bindings/displayio/ParallelBus.c
index e260f9b7e..a08c37679 100644
--- a/shared-bindings/displayio/ParallelBus.c
+++ b/shared-bindings/displayio/ParallelBus.c
@@ -106,6 +106,21 @@ STATIC mp_obj_t displayio_parallelbus_make_new(const mp_obj_type_t *type, size_t
     return self;
 }
 
+//|   .. method:: reset()
+//|
+//|     Performs a hardware reset via the reset pin. Raises an exception if called when no reset pin
+//|     is available.
+//|
+STATIC mp_obj_t displayio_parallelbus_obj_reset(mp_obj_t self_in) {
+    displayio_parallelbus_obj_t *self = self_in;
+
+    if (!common_hal_displayio_parallelbus_reset(self)) {
+        mp_raise_RuntimeError(translate("no reset pin available"));
+    }
+    return mp_const_none;
+}
+MP_DEFINE_CONST_FUN_OBJ_1(displayio_parallelbus_reset_obj, displayio_parallelbus_obj_reset);
+
 //|   .. method:: send(command, data)
 //|
 //|     Sends the given command value followed by the full set of data. Display state, such as
@@ -133,6 +148,7 @@ STATIC mp_obj_t displayio_parallelbus_obj_send(mp_obj_t self, mp_obj_t command_o
 MP_DEFINE_CONST_FUN_OBJ_3(displayio_parallelbus_send_obj, displayio_parallelbus_obj_send);
 
 STATIC const mp_rom_map_elem_t displayio_parallelbus_locals_dict_table[] = {
+    { MP_ROM_QSTR(MP_QSTR_reset), MP_ROM_PTR(&displayio_parallelbus_reset_obj) },
     { MP_ROM_QSTR(MP_QSTR_send), MP_ROM_PTR(&displayio_parallelbus_send_obj) },
 };
 STATIC MP_DEFINE_CONST_DICT(displayio_parallelbus_locals_dict, displayio_parallelbus_locals_dict_table);
diff --git a/shared-bindings/displayio/ParallelBus.h b/shared-bindings/displayio/ParallelBus.h
index b8da91041..a0f967332 100644
--- a/shared-bindings/displayio/ParallelBus.h
+++ b/shared-bindings/displayio/ParallelBus.h
@@ -40,7 +40,7 @@ void common_hal_displayio_parallelbus_construct(displayio_parallelbus_obj_t* sel
 
 void common_hal_displayio_parallelbus_deinit(displayio_parallelbus_obj_t* self);
 
-void common_hal_displayio_parallelbus_reset(mp_obj_t self);
+bool common_hal_displayio_parallelbus_reset(mp_obj_t self);
 bool common_hal_displayio_parallelbus_bus_free(mp_obj_t self);
 
 bool common_hal_displayio_parallelbus_begin_transaction(mp_obj_t self);