241 lines
9.4 KiB
C
241 lines
9.4 KiB
C
/*
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* This file is part of the MicroPython project, http://micropython.org/
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*
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* The MIT License (MIT)
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*
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* Copyright (c) 2018 Scott Shawcroft for Adafruit Industries
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include "shared-module/displayio/bus_core.h"
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#include "py/gc.h"
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#include "py/runtime.h"
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#if CIRCUITPY_FOURWIRE
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#include "shared-bindings/fourwire/FourWire.h"
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#endif
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#if CIRCUITPY_I2CDISPLAYBUS
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#include "shared-bindings/i2cdisplaybus/I2CDisplayBus.h"
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#endif
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#if CIRCUITPY_PARALLELDISPLAYBUS
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#include "shared-bindings/paralleldisplaybus/ParallelBus.h"
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#endif
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#include "shared-bindings/microcontroller/Pin.h"
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#include "shared-bindings/time/__init__.h"
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#include "shared-module/displayio/__init__.h"
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#include "shared-module/displayio/display_core.h"
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#include "supervisor/shared/display.h"
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#include "supervisor/shared/tick.h"
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#include <stdint.h>
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#include <string.h>
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#define DISPLAYIO_CORE_DEBUG(...) (void)0
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// #define DISPLAYIO_CORE_DEBUG(...) mp_printf(&mp_plat_print __VA_OPT__(,) __VA_ARGS__)
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void displayio_display_bus_construct(displayio_display_bus_t *self,
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mp_obj_t bus, uint16_t ram_width, uint16_t ram_height, int16_t colstart, int16_t rowstart,
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uint16_t column_command, uint16_t row_command, uint16_t set_current_column_command, uint16_t set_current_row_command,
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bool data_as_commands, bool always_toggle_chip_select, bool SH1107_addressing, bool address_little_endian) {
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self->ram_width = ram_width;
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self->ram_height = ram_height;
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self->colstart = colstart;
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self->rowstart = rowstart;
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self->column_command = column_command;
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self->row_command = row_command;
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self->set_current_column_command = set_current_column_command;
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self->set_current_row_command = set_current_row_command;
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self->data_as_commands = data_as_commands;
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self->always_toggle_chip_select = always_toggle_chip_select;
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self->SH1107_addressing = SH1107_addressing;
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self->address_little_endian = address_little_endian;
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#if CIRCUITPY_PARALLELDISPLAYBUS
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if (mp_obj_is_type(bus, ¶lleldisplaybus_parallelbus_type)) {
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self->bus_reset = common_hal_paralleldisplaybus_parallelbus_reset;
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self->bus_free = common_hal_paralleldisplaybus_parallelbus_bus_free;
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self->begin_transaction = common_hal_paralleldisplaybus_parallelbus_begin_transaction;
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self->send = common_hal_paralleldisplaybus_parallelbus_send;
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self->end_transaction = common_hal_paralleldisplaybus_parallelbus_end_transaction;
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self->collect_ptrs = common_hal_paralleldisplaybus_parallelbus_collect_ptrs;
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} else
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#endif
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#if CIRCUITPY_FOURWIRE
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if (mp_obj_is_type(bus, &fourwire_fourwire_type)) {
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self->bus_reset = common_hal_fourwire_fourwire_reset;
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self->bus_free = common_hal_fourwire_fourwire_bus_free;
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self->begin_transaction = common_hal_fourwire_fourwire_begin_transaction;
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self->send = common_hal_fourwire_fourwire_send;
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self->end_transaction = common_hal_fourwire_fourwire_end_transaction;
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self->collect_ptrs = common_hal_fourwire_fourwire_collect_ptrs;
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} else
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#endif
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#if CIRCUITPY_I2CDISPLAYBUS
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if (mp_obj_is_type(bus, &i2cdisplaybus_i2cdisplaybus_type)) {
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self->bus_reset = common_hal_i2cdisplaybus_i2cdisplaybus_reset;
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self->bus_free = common_hal_i2cdisplaybus_i2cdisplaybus_bus_free;
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self->begin_transaction = common_hal_i2cdisplaybus_i2cdisplaybus_begin_transaction;
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self->send = common_hal_i2cdisplaybus_i2cdisplaybus_send;
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self->end_transaction = common_hal_i2cdisplaybus_i2cdisplaybus_end_transaction;
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self->collect_ptrs = common_hal_i2cdisplaybus_i2cdisplaybus_collect_ptrs;
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} else
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#endif
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{
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mp_raise_ValueError(MP_ERROR_TEXT("Unsupported display bus type"));
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}
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self->bus = bus;
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}
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bool displayio_display_bus_is_free(displayio_display_bus_t *self) {
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return !self->bus || self->bus_free(self->bus);
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}
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bool displayio_display_bus_begin_transaction(displayio_display_bus_t *self) {
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return self->begin_transaction(self->bus);
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}
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void displayio_display_bus_end_transaction(displayio_display_bus_t *self) {
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self->end_transaction(self->bus);
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}
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void displayio_display_bus_set_region_to_update(displayio_display_bus_t *self, displayio_display_core_t *display, displayio_area_t *area) {
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uint16_t x1 = area->x1 + self->colstart;
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uint16_t x2 = area->x2 + self->colstart;
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uint16_t y1 = area->y1 + self->rowstart;
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uint16_t y2 = area->y2 + self->rowstart;
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// Collapse down the dimension where multiple pixels are in a byte.
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if (display->colorspace.depth < 8) {
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uint8_t pixels_per_byte = 8 / display->colorspace.depth;
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if (display->colorspace.pixels_in_byte_share_row) {
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x1 /= pixels_per_byte * display->colorspace.bytes_per_cell;
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x2 /= pixels_per_byte * display->colorspace.bytes_per_cell;
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} else {
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y1 /= pixels_per_byte * display->colorspace.bytes_per_cell;
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y2 /= pixels_per_byte * display->colorspace.bytes_per_cell;
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}
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}
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x2 -= 1;
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y2 -= 1;
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display_chip_select_behavior_t chip_select = CHIP_SELECT_UNTOUCHED;
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if (self->always_toggle_chip_select || self->data_as_commands) {
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chip_select = CHIP_SELECT_TOGGLE_EVERY_BYTE;
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}
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// Set column.
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displayio_display_bus_begin_transaction(self);
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uint8_t data[5];
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data[0] = self->column_command;
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uint8_t data_length = 1;
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display_byte_type_t data_type = DISPLAY_DATA;
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if (!self->data_as_commands) {
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self->send(self->bus, DISPLAY_COMMAND, CHIP_SELECT_UNTOUCHED, data, 1);
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data_length = 0;
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} else {
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data_type = DISPLAY_COMMAND;
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}
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if (self->ram_width < 0x100) {
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data[data_length++] = x1;
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data[data_length++] = x2;
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} else {
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if (self->address_little_endian) {
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x1 = __builtin_bswap16(x1);
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x2 = __builtin_bswap16(x2);
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}
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data[data_length++] = x1 >> 8;
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data[data_length++] = x1 & 0xff;
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data[data_length++] = x2 >> 8;
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data[data_length++] = x2 & 0xff;
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}
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// Quirk for SH1107 "SH1107_addressing"
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// Column lower command = 0x00, Column upper command = 0x10
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if (self->SH1107_addressing) {
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data[0] = ((x1 >> 4) & 0x0F) | 0x10; // 0x10 to 0x17
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data[1] = x1 & 0x0F; // 0x00 to 0x0F
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data_length = 2;
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}
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self->send(self->bus, data_type, chip_select, data, data_length);
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displayio_display_bus_end_transaction(self);
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if (self->set_current_column_command != NO_COMMAND) {
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uint8_t command = self->set_current_column_command;
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displayio_display_bus_begin_transaction(self);
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self->send(self->bus, DISPLAY_COMMAND, chip_select, &command, 1);
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// Only send the first half of data because it is the first coordinate.
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self->send(self->bus, DISPLAY_DATA, chip_select, data, data_length / 2);
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displayio_display_bus_end_transaction(self);
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}
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// Set row.
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displayio_display_bus_begin_transaction(self);
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data[0] = self->row_command;
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data_length = 1;
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if (!self->data_as_commands) {
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self->send(self->bus, DISPLAY_COMMAND, CHIP_SELECT_UNTOUCHED, data, 1);
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data_length = 0;
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}
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if (self->ram_height < 0x100) {
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data[data_length++] = y1;
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data[data_length++] = y2;
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} else {
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if (self->address_little_endian) {
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y1 = __builtin_bswap16(y1);
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y2 = __builtin_bswap16(y2);
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}
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data[data_length++] = y1 >> 8;
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data[data_length++] = y1 & 0xff;
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data[data_length++] = y2 >> 8;
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data[data_length++] = y2 & 0xff;
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}
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// Quirk for SH1107 "SH1107_addressing"
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// Page address command = 0xB0
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if (self->SH1107_addressing) {
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// set the page to our y value
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data[0] = 0xB0 | y1;
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data_length = 1;
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}
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self->send(self->bus, data_type, chip_select, data, data_length);
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displayio_display_bus_end_transaction(self);
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if (self->set_current_row_command != NO_COMMAND) {
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uint8_t command = self->set_current_row_command;
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displayio_display_bus_begin_transaction(self);
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self->send(self->bus, DISPLAY_COMMAND, chip_select, &command, 1);
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// Only send the first half of data because it is the first coordinate.
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self->send(self->bus, DISPLAY_DATA, chip_select, data, data_length / 2);
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displayio_display_bus_end_transaction(self);
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}
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}
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void displayio_display_bus_collect_ptrs(displayio_display_bus_t *self) {
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self->collect_ptrs(self->bus);
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}
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