Rework based on Dan's review

1 files changed, 19 insertions, 0 deletions

diff --git a/shared-bindings/displayio/__init__.h b/shared-bindings/displayio/__init__.h
index 427ddb47d..122b1fbcb 100644
--- a/shared-bindings/displayio/__init__.h
+++ b/shared-bindings/displayio/__init__.h
@@ -27,6 +27,25 @@
 #ifndef MICROPY_INCLUDED_SHARED_BINDINGS_DISPLAYIO___INIT___H
 #define MICROPY_INCLUDED_SHARED_BINDINGS_DISPLAYIO___INIT___H
 
+#include "py/obj.h"
+
+typedef enum {
+    DISPLAY_COMMAND,
+    DISPLAY_DATA
+} display_byte_type_t;
+
+
+typedef enum {
+    CHIP_SELECT_UNTOUCHED,
+    CHIP_SELECT_TOGGLE_EVERY_BYTE
+} display_chip_select_behavior_t;
+
+typedef bool (*display_bus_bus_reset)(mp_obj_t bus);
+typedef bool (*display_bus_bus_free)(mp_obj_t bus);
+typedef bool (*display_bus_begin_transaction)(mp_obj_t bus);
+typedef void (*display_bus_send)(mp_obj_t bus, display_byte_type_t byte_type, display_chip_select_behavior_t chip_select, uint8_t *data, uint32_t data_length);
+typedef void (*display_bus_end_transaction)(mp_obj_t bus);
+
 void common_hal_displayio_release_displays(void);
 
 #endif  // MICROPY_INCLUDED_SHARED_BINDINGS_DISPLAYIO___INIT___H