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-rw-r--r--shared-module/_stage/__init__.c4
-rw-r--r--shared-module/displayio/ColorConverter.c38
-rw-r--r--shared-module/displayio/Display.c47
-rw-r--r--shared-module/displayio/Display.h2
-rw-r--r--shared-module/displayio/EPaperDisplay.c24
-rw-r--r--shared-module/displayio/EPaperDisplay.h2
-rw-r--r--shared-module/displayio/FourWire.c7
-rw-r--r--shared-module/displayio/I2CDisplay.c7
-rw-r--r--shared-module/displayio/display_core.c38
-rw-r--r--shared-module/displayio/display_core.h7
10 files changed, 74 insertions, 102 deletions
diff --git a/shared-module/_stage/__init__.c b/shared-module/_stage/__init__.c
index bfef165e7..2c525be87 100644
--- a/shared-module/_stage/__init__.c
+++ b/shared-module/_stage/__init__.c
@@ -57,7 +57,7 @@ void render_stage(uint16_t x0, uint16_t y0, uint16_t x1, uint16_t y1,
index += 1;
// The buffer is full, send it.
if (index >= buffer_size) {
- display->core.send(display->core.bus, false, false, ((uint8_t*)buffer),
+ display->core.send(display->core.bus, DISPLAY_DATA, CHIP_SELECT_UNTOUCHED, ((uint8_t*)buffer),
buffer_size * 2);
index = 0;
}
@@ -67,6 +67,6 @@ void render_stage(uint16_t x0, uint16_t y0, uint16_t x1, uint16_t y1,
}
// Send the remaining data.
if (index) {
- display->core.send(display->core.bus, false, false, ((uint8_t*)buffer), index * 2);
+ display->core.send(display->core.bus, DISPLAY_DATA, CHIP_SELECT_UNTOUCHED, ((uint8_t*)buffer), index * 2);
}
}
diff --git a/shared-module/displayio/ColorConverter.c b/shared-module/displayio/ColorConverter.c
index e0c4ca286..940aaa1c6 100644
--- a/shared-module/displayio/ColorConverter.c
+++ b/shared-module/displayio/ColorConverter.c
@@ -26,6 +26,8 @@
#include "shared-bindings/displayio/ColorConverter.h"
+#include "py/misc.h"
+
void common_hal_displayio_colorconverter_construct(displayio_colorconverter_t* self) {
}
@@ -45,39 +47,12 @@ uint8_t displayio_colorconverter_compute_luma(uint32_t color_rgb888) {
return (r8 * 19) / 255 + (g8 * 182) / 255 + (b8 + 54) / 255;
}
-void compute_bounds(uint8_t r8, uint8_t g8, uint8_t b8, uint8_t* min, uint8_t* max) {
- if (r8 > g8) {
- if (b8 > r8) {
- *max = b8;
- } else {
- *max = r8;
- }
- if (b8 < g8) {
- *min = b8;
- } else {
- *min = g8;
- }
- } else {
- if (b8 > g8) {
- *max = b8;
- } else {
- *max = g8;
- }
- if (b8 < r8) {
- *min = b8;
- } else {
- *min = r8;
- }
- }
-}
-
uint8_t displayio_colorconverter_compute_chroma(uint32_t color_rgb888) {
uint32_t r8 = (color_rgb888 >> 16);
uint32_t g8 = (color_rgb888 >> 8) & 0xff;
uint32_t b8 = color_rgb888 & 0xff;
- uint8_t max;
- uint8_t min;
- compute_bounds(r8, g8, b8, &min, &max);
+ uint8_t max = MAX(r8, MAX(g8, b8));
+ uint8_t min = MIN(r8, MIN(g8, b8));
return max - min;
}
@@ -85,9 +60,8 @@ uint8_t displayio_colorconverter_compute_hue(uint32_t color_rgb888) {
uint32_t r8 = (color_rgb888 >> 16);
uint32_t g8 = (color_rgb888 >> 8) & 0xff;
uint32_t b8 = color_rgb888 & 0xff;
- uint8_t max;
- uint8_t min;
- compute_bounds(r8, g8, b8, &min, &max);
+ uint8_t max = MAX(r8, MAX(g8, b8));
+ uint8_t min = MIN(r8, MIN(g8, b8));
uint8_t c = max - min;
if (c == 0) {
return 0;
diff --git a/shared-module/displayio/Display.c b/shared-module/displayio/Display.c
index 109b91507..cb5051bb7 100644
--- a/shared-module/displayio/Display.c
+++ b/shared-module/displayio/Display.c
@@ -69,7 +69,7 @@ void common_hal_displayio_display_construct(displayio_display_obj_t* self,
self->data_as_commands = data_as_commands;
self->native_frames_per_second = native_frames_per_second;
- self->native_frame_time = 1000 / native_frames_per_second;
+ self->native_ms_per_frame = 1000 / native_frames_per_second;
uint32_t i = 0;
while (i < init_sequence_len) {
@@ -85,10 +85,10 @@ void common_hal_displayio_display_construct(displayio_display_obj_t* self,
uint8_t full_command[data_size + 1];
full_command[0] = cmd[0];
memcpy(full_command + 1, data, data_size);
- self->core.send(self->core.bus, true, true, full_command, data_size + 1);
+ self->core.send(self->core.bus, DISPLAY_COMMAND, CHIP_SELECT_TOGGLE_EVERY_BYTE, full_command, data_size + 1);
} else {
- self->core.send(self->core.bus, true, true, cmd, 1);
- self->core.send(self->core.bus, false, false, data, data_size);
+ self->core.send(self->core.bus, DISPLAY_COMMAND, CHIP_SELECT_TOGGLE_EVERY_BYTE, cmd, 1);
+ self->core.send(self->core.bus, DISPLAY_DATA, CHIP_SELECT_UNTOUCHED, data, data_size);
}
self->core.end_transaction(self->core.bus);
uint16_t delay_length_ms = 10;
@@ -168,12 +168,12 @@ bool common_hal_displayio_display_set_brightness(displayio_display_obj_t* self,
if (ok) {
if (self->data_as_commands) {
uint8_t set_brightness[2] = {self->brightness_command, (uint8_t) (0xff * brightness)};
- self->core.send(self->core.bus, true, true, set_brightness, 2);
+ self->core.send(self->core.bus, DISPLAY_COMMAND, CHIP_SELECT_TOGGLE_EVERY_BYTE, set_brightness, 2);
} else {
uint8_t command = self->brightness_command;
uint8_t hex_brightness = 0xff * brightness;
- self->core.send(self->core.bus, true, true, &command, 1);
- self->core.send(self->core.bus, false, false, &hex_brightness, 1);
+ self->core.send(self->core.bus, DISPLAY_COMMAND, CHIP_SELECT_TOGGLE_EVERY_BYTE, &command, 1);
+ self->core.send(self->core.bus, DISPLAY_DATA, CHIP_SELECT_UNTOUCHED, &hex_brightness, 1);
}
displayio_display_core_end_transaction(&self->core);
}
@@ -202,9 +202,9 @@ STATIC const displayio_area_t* _get_refresh_areas(displayio_display_obj_t *self)
STATIC void _send_pixels(displayio_display_obj_t* self, uint8_t* pixels, uint32_t length) {
if (!self->data_as_commands) {
- self->core.send(self->core.bus, true, true, &self->write_ram_command, 1);
+ self->core.send(self->core.bus, DISPLAY_COMMAND, CHIP_SELECT_TOGGLE_EVERY_BYTE, &self->write_ram_command, 1);
}
- self->core.send(self->core.bus, false, false, pixels, length);
+ self->core.send(self->core.bus, DISPLAY_DATA, CHIP_SELECT_UNTOUCHED, pixels, length);
}
STATIC bool _refresh_area(displayio_display_obj_t* self, const displayio_area_t* area) {
@@ -270,12 +270,8 @@ STATIC bool _refresh_area(displayio_display_obj_t* self, const displayio_area_t*
subrectangle_size_bytes = displayio_area_size(&subrectangle) / (8 / self->core.colorspace.depth);
}
- for (uint16_t k = 0; k < mask_length; k++) {
- mask[k] = 0x00000000;
- }
- for (uint16_t k = 0; k < buffer_size; k++) {
- buffer[k] = 0x00000000;
- }
+ memset(mask, 0, mask_length * sizeof(uint32_t));
+ memset(buffer, 0, buffer_size * sizeof(uint32_t));
displayio_display_core_fill_area(&self->core, &subrectangle, mask, buffer);
@@ -313,30 +309,29 @@ uint16_t common_hal_displayio_display_get_rotation(displayio_display_obj_t* self
return self->core.rotation;
}
-void common_hal_displayio_display_refresh(displayio_display_obj_t* self, uint32_t target_frame_time, uint32_t maximum_frame_time) {
+bool common_hal_displayio_display_refresh(displayio_display_obj_t* self, uint32_t target_ms_per_frame, uint32_t maximum_ms_per_real_frame) {
if (!self->auto_refresh && !self->first_manual_refresh) {
uint64_t current_time = ticks_ms;
- uint32_t current_frame_time = current_time - self->core.last_refresh;
+ uint32_t current_ms_since_real_refresh = current_time - self->core.last_refresh;
// Test to see if the real frame time is below our minimum.
- if (current_frame_time > maximum_frame_time) {
+ if (current_ms_since_real_refresh > maximum_ms_per_real_frame) {
mp_raise_RuntimeError(translate("Below minimum frame rate"));
}
- uint32_t current_call_time = current_time - self->last_refresh_call;
+ uint32_t current_ms_since_last_call = current_time - self->last_refresh_call;
self->last_refresh_call = current_time;
// Skip the actual refresh to help catch up.
- if (current_call_time > target_frame_time) {
- return;
+ if (current_ms_since_last_call > target_ms_per_frame) {
+ return false;
}
- uint32_t remaining_time = target_frame_time - (current_frame_time % target_frame_time);
+ uint32_t remaining_time = target_ms_per_frame - (current_ms_since_real_refresh % target_ms_per_frame);
// We're ahead of the game so wait until we align with the frame rate.
while (ticks_ms - self->last_refresh_call < remaining_time) {
- #ifdef MICROPY_VM_HOOK_LOOP
- MICROPY_VM_HOOK_LOOP ;
- #endif
+ RUN_BACKGROUND_TASKS;
}
}
self->first_manual_refresh = false;
_refresh_display(self);
+ return true;
}
bool common_hal_displayio_display_get_auto_refresh(displayio_display_obj_t* self) {
@@ -366,7 +361,7 @@ STATIC void _update_backlight(displayio_display_obj_t* self) {
void displayio_display_background(displayio_display_obj_t* self) {
_update_backlight(self);
- if (self->auto_refresh && (ticks_ms - self->core.last_refresh) > self->native_frame_time) {
+ if (self->auto_refresh && (ticks_ms - self->core.last_refresh) > self->native_ms_per_frame) {
_refresh_display(self);
}
}
diff --git a/shared-module/displayio/Display.h b/shared-module/displayio/Display.h
index bf2889c6d..e5fe0a708 100644
--- a/shared-module/displayio/Display.h
+++ b/shared-module/displayio/Display.h
@@ -46,7 +46,7 @@ typedef struct {
mp_float_t current_brightness;
uint16_t brightness_command;
uint16_t native_frames_per_second;
- uint16_t native_frame_time;
+ uint16_t native_ms_per_frame;
uint8_t set_column_command;
uint8_t set_row_command;
uint8_t write_ram_command;
diff --git a/shared-module/displayio/EPaperDisplay.c b/shared-module/displayio/EPaperDisplay.c
index 48143f14f..38b63df0f 100644
--- a/shared-module/displayio/EPaperDisplay.c
+++ b/shared-module/displayio/EPaperDisplay.c
@@ -71,7 +71,7 @@ void common_hal_displayio_epaperdisplay_construct(displayio_epaperdisplay_obj_t*
self->busy_state = busy_state;
self->refreshing = false;
self->milliseconds_per_frame = seconds_per_frame * 1000;
- self->always_toggle_chip_select = always_toggle_chip_select;
+ self->always_toggle_chip_select = always_toggle_chip_select ? CHIP_SELECT_TOGGLE_EVERY_BYTE : CHIP_SELECT_UNTOUCHED;
self->start_sequence = start_sequence;
self->start_sequence_len = start_sequence_len;
@@ -130,9 +130,7 @@ STATIC void wait_for_busy(displayio_epaperdisplay_obj_t* self) {
return;
}
while (common_hal_digitalio_digitalinout_get_value(&self->busy) == self->busy_state) {
- #ifdef MICROPY_VM_HOOK_LOOP
- MICROPY_VM_HOOK_LOOP
- #endif
+ RUN_BACKGROUND_TASKS;
}
}
@@ -145,8 +143,8 @@ STATIC void send_command_sequence(displayio_epaperdisplay_obj_t* self, bool shou
data_size &= ~DELAY;
uint8_t *data = cmd + 2;
displayio_display_core_begin_transaction(&self->core);
- self->core.send(self->core.bus, true, self->always_toggle_chip_select, cmd, 1);
- self->core.send(self->core.bus, false, self->always_toggle_chip_select, data, data_size);
+ self->core.send(self->core.bus, DISPLAY_COMMAND, self->always_toggle_chip_select, cmd, 1);
+ self->core.send(self->core.bus, DISPLAY_DATA, self->always_toggle_chip_select, data, data_size);
displayio_display_core_end_transaction(&self->core);
uint16_t delay_length_ms = 0;
if (delay) {
@@ -187,7 +185,7 @@ uint32_t common_hal_displayio_epaperdisplay_get_time_to_refresh(displayio_epaper
void displayio_epaperdisplay_finish_refresh(displayio_epaperdisplay_obj_t* self) {
// Actually refresh the display now that all pixel RAM has been updated.
displayio_display_core_begin_transaction(&self->core);
- self->core.send(self->core.bus, true, self->always_toggle_chip_select, &self->refresh_display_command, 1);
+ self->core.send(self->core.bus, DISPLAY_COMMAND, self->always_toggle_chip_select, &self->refresh_display_command, 1);
displayio_display_core_end_transaction(&self->core);
self->refreshing = true;
@@ -248,7 +246,7 @@ bool displayio_epaperdisplay_refresh_area(displayio_epaperdisplay_obj_t* self, c
write_command = self->write_color_ram_command;
}
displayio_display_core_begin_transaction(&self->core);
- self->core.send(self->core.bus, true, self->always_toggle_chip_select, &write_command, 1);
+ self->core.send(self->core.bus, DISPLAY_COMMAND, self->always_toggle_chip_select, &write_command, 1);
displayio_display_core_end_transaction(&self->core);
for (uint16_t j = 0; j < subrectangles; j++) {
@@ -266,12 +264,8 @@ bool displayio_epaperdisplay_refresh_area(displayio_epaperdisplay_obj_t* self, c
uint16_t subrectangle_size_bytes = displayio_area_size(&subrectangle) / (8 / self->core.colorspace.depth);
- for (uint16_t k = 0; k < mask_length; k++) {
- mask[k] = 0x00000000;
- }
- for (uint16_t k = 0; k < buffer_size; k++) {
- buffer[k] = 0x00000000;
- }
+ memset(mask, 0, mask_length * sizeof(uint32_t));
+ memset(buffer, 0, buffer_size * sizeof(uint32_t));
self->core.colorspace.grayscale = true;
if (pass == 1) {
@@ -291,7 +285,7 @@ bool displayio_epaperdisplay_refresh_area(displayio_epaperdisplay_obj_t* self, c
// Can't acquire display bus; skip the rest of the data. Try next display.
return false;
}
- self->core.send(self->core.bus, false, self->always_toggle_chip_select, (uint8_t*) buffer, subrectangle_size_bytes);
+ self->core.send(self->core.bus, DISPLAY_DATA, self->always_toggle_chip_select, (uint8_t*) buffer, subrectangle_size_bytes);
displayio_display_core_end_transaction(&self->core);
// TODO(tannewt): Make refresh displays faster so we don't starve other
diff --git a/shared-module/displayio/EPaperDisplay.h b/shared-module/displayio/EPaperDisplay.h
index a5d4ec93f..580171a5f 100644
--- a/shared-module/displayio/EPaperDisplay.h
+++ b/shared-module/displayio/EPaperDisplay.h
@@ -56,7 +56,7 @@ typedef struct {
bool black_bits_inverted;
bool color_bits_inverted;
bool refreshing;
- bool always_toggle_chip_select;
+ display_chip_select_behavior_t always_toggle_chip_select;
} displayio_epaperdisplay_obj_t;
void displayio_epaperdisplay_background(displayio_epaperdisplay_obj_t* self);
diff --git a/shared-module/displayio/FourWire.c b/shared-module/displayio/FourWire.c
index 7294e9772..fcc4c1a20 100644
--- a/shared-module/displayio/FourWire.c
+++ b/shared-module/displayio/FourWire.c
@@ -33,6 +33,7 @@
#include "shared-bindings/digitalio/DigitalInOut.h"
#include "shared-bindings/microcontroller/__init__.h"
#include "shared-bindings/time/__init__.h"
+#include "shared-module/displayio/display_core.h"
#include "tick.h"
@@ -110,10 +111,10 @@ bool common_hal_displayio_fourwire_begin_transaction(mp_obj_t obj) {
return true;
}
-void common_hal_displayio_fourwire_send(mp_obj_t obj, bool command, bool toggle_every_byte, uint8_t *data, uint32_t data_length) {
+void common_hal_displayio_fourwire_send(mp_obj_t obj, display_byte_type_t data_type, display_chip_select_behavior_t chip_select, uint8_t *data, uint32_t data_length) {
displayio_fourwire_obj_t* self = MP_OBJ_TO_PTR(obj);
- common_hal_digitalio_digitalinout_set_value(&self->command, !command);
- if (toggle_every_byte) {
+ common_hal_digitalio_digitalinout_set_value(&self->command, data_type == DISPLAY_DATA);
+ if (chip_select == CHIP_SELECT_TOGGLE_EVERY_BYTE) {
// Toggle chip select after each command byte in case the display driver
// IC latches commands based on it.
for (size_t i = 0; i < data_length; i++) {
diff --git a/shared-module/displayio/I2CDisplay.c b/shared-module/displayio/I2CDisplay.c
index 95830ba0e..87261dca0 100644
--- a/shared-module/displayio/I2CDisplay.c
+++ b/shared-module/displayio/I2CDisplay.c
@@ -35,6 +35,7 @@
#include "shared-bindings/digitalio/DigitalInOut.h"
#include "shared-bindings/microcontroller/__init__.h"
#include "shared-bindings/time/__init__.h"
+#include "shared-module/displayio/display_core.h"
#include "tick.h"
@@ -80,7 +81,7 @@ bool common_hal_displayio_i2cdisplay_reset(mp_obj_t obj) {
}
common_hal_digitalio_digitalinout_set_value(&self->reset, false);
- common_hal_mcu_delay_us(1);
+ common_hal_mcu_delay_us(4);
common_hal_digitalio_digitalinout_set_value(&self->reset, true);
return true;
}
@@ -97,9 +98,9 @@ bool common_hal_displayio_i2cdisplay_begin_transaction(mp_obj_t obj) {
return common_hal_displayio_i2cdisplay_bus_free(obj);
}
-void common_hal_displayio_i2cdisplay_send(mp_obj_t obj, bool command, bool toggle_every_byte, uint8_t *data, uint32_t data_length) {
+void common_hal_displayio_i2cdisplay_send(mp_obj_t obj, display_byte_type_t data_type, display_chip_select_behavior_t chip_select, uint8_t *data, uint32_t data_length) {
displayio_i2cdisplay_obj_t* self = MP_OBJ_TO_PTR(obj);
- if (command) {
+ if (data_type == DISPLAY_COMMAND) {
uint8_t command_bytes[2 * data_length];
for (uint32_t i = 0; i < data_length; i++) {
command_bytes[2 * i] = 0x80;
diff --git a/shared-module/displayio/display_core.c b/shared-module/displayio/display_core.c
index 88878866a..0f449ea34 100644
--- a/shared-module/displayio/display_core.c
+++ b/shared-module/displayio/display_core.c
@@ -184,7 +184,6 @@ void displayio_display_core_end_transaction(displayio_display_core_t* self) {
}
void displayio_display_core_set_region_to_update(displayio_display_core_t* self, uint8_t column_command, uint8_t row_command, uint16_t set_current_column_command, uint16_t set_current_row_command, bool data_as_commands, bool always_toggle_chip_select, displayio_area_t* area) {
- displayio_display_core_begin_transaction(self);
uint16_t x1 = area->x1;
uint16_t x2 = area->x2;
uint16_t y1 = area->y1;
@@ -201,13 +200,22 @@ void displayio_display_core_set_region_to_update(displayio_display_core_t* self,
}
}
+ display_chip_select_behavior_t chip_select = CHIP_SELECT_UNTOUCHED;
+ if (always_toggle_chip_select || data_as_commands) {
+ chip_select = CHIP_SELECT_TOGGLE_EVERY_BYTE;
+ }
+
// Set column.
+ displayio_display_core_begin_transaction(self);
uint8_t data[5];
data[0] = column_command;
uint8_t data_length = 1;
+ display_byte_type_t data_type = DISPLAY_DATA;
if (!data_as_commands) {
- self->send(self->bus, true, false, data, 1);
+ self->send(self->bus, DISPLAY_COMMAND, CHIP_SELECT_UNTOUCHED, data, 1);
data_length = 0;
+ } else {
+ data_type = DISPLAY_COMMAND;
}
if (self->ram_width < 0x100) {
data[data_length++] = x1 + self->colstart;
@@ -220,21 +228,23 @@ void displayio_display_core_set_region_to_update(displayio_display_core_t* self,
data[data_length++] = x2 >> 8;
data[data_length++] = x2 & 0xff;
}
- self->send(self->bus, data_as_commands, data_as_commands, data, data_length);
+ self->send(self->bus, data_type, chip_select, data, data_length);
+ displayio_display_core_end_transaction(self);
if (set_current_column_command != NO_COMMAND) {
uint8_t command = set_current_column_command;
- self->send(self->bus, true, always_toggle_chip_select, &command, 1);
- self->send(self->bus, false, always_toggle_chip_select, data, data_length / 2);
+ displayio_display_core_begin_transaction(self);
+ self->send(self->bus, DISPLAY_COMMAND, chip_select, &command, 1);
+ self->send(self->bus, DISPLAY_DATA, chip_select, data, data_length / 2);
+ displayio_display_core_end_transaction(self);
}
- displayio_display_core_end_transaction(self);
- displayio_display_core_begin_transaction(self);
// Set row.
+ displayio_display_core_begin_transaction(self);
data[0] = row_command;
data_length = 1;
if (!data_as_commands) {
- self->send(self->bus, true, false, data, 1);
+ self->send(self->bus, DISPLAY_COMMAND, CHIP_SELECT_UNTOUCHED, data, 1);
data_length = 0;
}
if (self->ram_height < 0x100) {
@@ -248,14 +258,16 @@ void displayio_display_core_set_region_to_update(displayio_display_core_t* self,
data[data_length++] = y2 >> 8;
data[data_length++] = y2 & 0xff;
}
- self->send(self->bus, data_as_commands, data_as_commands, data, data_length);
+ self->send(self->bus, data_type, chip_select, data, data_length);
+ displayio_display_core_end_transaction(self);
+
if (set_current_row_command != NO_COMMAND) {
uint8_t command = set_current_row_command;
- self->send(self->bus, true, always_toggle_chip_select, &command, 1);
- self->send(self->bus, false, always_toggle_chip_select, data, data_length / 2);
+ displayio_display_core_begin_transaction(self);
+ self->send(self->bus, DISPLAY_COMMAND, chip_select, &command, 1);
+ self->send(self->bus, DISPLAY_DATA, chip_select, data, data_length / 2);
+ displayio_display_core_end_transaction(self);
}
-
- displayio_display_core_end_transaction(self);
}
void displayio_display_core_start_refresh(displayio_display_core_t* self) {
diff --git a/shared-module/displayio/display_core.h b/shared-module/displayio/display_core.h
index b1a412883..e92fdbc9f 100644
--- a/shared-module/displayio/display_core.h
+++ b/shared-module/displayio/display_core.h
@@ -27,18 +27,13 @@
#ifndef MICROPY_INCLUDED_SHARED_MODULE_DISPLAYIO_DISPLAY_CORE_H
#define MICROPY_INCLUDED_SHARED_MODULE_DISPLAYIO_DISPLAY_CORE_H
+#include "shared-bindings/displayio/__init__.h"
#include "shared-bindings/displayio/Group.h"
#include "shared-module/displayio/area.h"
#define NO_COMMAND 0x100
-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, bool command, bool toggle_every_byte, uint8_t *data, uint32_t data_length);
-typedef void (*display_bus_end_transaction)(mp_obj_t bus);
-
typedef struct {
mp_obj_t bus;
displayio_group_t *current_group;