mirror of
https://github.com/portapack-mayhem/mayhem-firmware.git
synced 2024-12-13 19:54:39 +00:00
334 lines
9.2 KiB
C++
334 lines
9.2 KiB
C++
/*
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* Copyright (C) 2014 Jared Boone, ShareBrained Technology, Inc.
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*
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* This file is part of PortaPack.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2, or (at your option)
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* any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; see the file COPYING. If not, write to
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* the Free Software Foundation, Inc., 51 Franklin Street,
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* Boston, MA 02110-1301, USA.
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*/
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#include "lcd_ili9341.hpp"
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#include "portapack_io.hpp"
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using namespace portapack;
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#include "utility.hpp"
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#include "ch.h"
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namespace lcd {
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namespace {
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void lcd_reset() {
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io.lcd_reset_state(false);
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chThdSleepMilliseconds(1);
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io.lcd_reset_state(true);
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chThdSleepMilliseconds(10);
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io.lcd_reset_state(false);
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chThdSleepMilliseconds(120);
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}
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void lcd_init() {
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// LCDs are configured for IM[2:0] = 001
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// 8080-I system, 16-bit parallel bus
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//
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// 0x3a: DBI[2:0] = 101
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// MDT[1:0] = XX (if not in 18-bit mode, right?)
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// Power control B
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// 0
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// PCEQ=1, DRV_ena=0, Power control=3
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io.lcd_data_write_command_and_data(0xCF, { 0x00, 0xD9, 0x30 });
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// Power on sequence control
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io.lcd_data_write_command_and_data(0xED, { 0x64, 0x03, 0x12, 0x81 });
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// Driver timing control A
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io.lcd_data_write_command_and_data(0xE8, { 0x85, 0x10, 0x78 });
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// Power control A
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io.lcd_data_write_command_and_data(0xCB, { 0x39, 0x2C, 0x00, 0x34, 0x02 });
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// Pump ratio control
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io.lcd_data_write_command_and_data(0xF7, { 0x20 });
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// Driver timing control B
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io.lcd_data_write_command_and_data(0xEA, { 0x00, 0x00 });
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io.lcd_data_write_command_and_data(0xB1, { 0x00, 0x1B });
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// Blanking Porch Control
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// VFP = 0b0000010 = 2 (number of HSYNC of vertical front porch)
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// VBP = 0b0000010 = 2 (number of HSYNC of vertical back porch)
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// HFP = 0b0001010 = 10 (number of DOTCLOCK of horizontal front porch)
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// HBP = 0b0010100 = 20 (number of DOTCLOCK of horizontal back porch)
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io.lcd_data_write_command_and_data(0xB5, { 0x02, 0x02, 0x0a, 0x14 });
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// Display Function Control
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// PT[1:0] = 0b10
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// PTG[1:0] = 0b10
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// ISC[3:0] = 0b0010 (scan cycle interval of gate driver: 5 frames)
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// SM = 0 (gate driver pin arrangement in combination with GS)
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// SS = 1 (source output scan direction S720 -> S1)
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// GS = 0 (gate output scan direction G1 -> G320)
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// REV = 1 (normally white)
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// NL = 0b100111 (default)
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// PCDIV = 0b000000 (default?)
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io.lcd_data_write_command_and_data(0xB6, { 0x0A, 0xA2, 0x27, 0x00 });
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// Power Control 1
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//VRH[5:0]
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io.lcd_data_write_command_and_data(0xC0, { 0x1B });
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// Power Control 2
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//SAP[2:0];BT[3:0]
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io.lcd_data_write_command_and_data(0xC1, { 0x12 });
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// VCOM Control 1
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io.lcd_data_write_command_and_data(0xC5, { 0x32, 0x3C });
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// VCOM Control 2
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io.lcd_data_write_command_and_data(0xC7, { 0x9B });
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// Memory Access Control
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// Invert X and Y memory access order, so upper-left of
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// screen is (0,0) when writing to display.
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io.lcd_data_write_command_and_data(0x36, {
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(1 << 7) | // MY=1
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(1 << 6) | // MX=1
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(0 << 5) | // MV=0
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(1 << 4) | // ML=1: reverse vertical refresh to simplify scrolling logic
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(1 << 3) // BGR=1: For Kingtech LCD, BGR filter.
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});
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// COLMOD: Pixel Format Set
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// DPI=101 (16 bits/pixel), DBI=101 (16 bits/pixel)
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io.lcd_data_write_command_and_data(0x3A, { 0x55 });
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//io.lcd_data_write_command_and_data(0xF6, { 0x01, 0x30 });
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// WEMODE=1 (reset column and page number on overflow)
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// MDT[1:0]
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// EPF[1:0]=00 (use channel MSB for LSB)
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// RIM=0 (If COLMOD[6:4]=101 (65k color), 16-bit RGB interface (1 transfer/pixel))
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// RM=0 (system interface/VSYNC interface)
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// DM[1:0]=00 (internal clock operation)
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// ENDIAN=0 (doesn't matter with 16-bit interface)
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io.lcd_data_write_command_and_data(0xF6, { 0x01, 0x30, 0x00 });
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// 3Gamma Function Disable
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io.lcd_data_write_command_and_data(0xF2, { 0x00 });
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// Gamma curve selected
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io.lcd_data_write_command_and_data(0x26, { 0x01 });
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// Set Gamma
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io.lcd_data_write_command_and_data(0xE0, {
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0x0F, 0x1D, 0x19, 0x0E, 0x10, 0x07, 0x4C, 0x63,
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0x3F, 0x03, 0x0D, 0x00, 0x26, 0x24, 0x04
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});
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// Set Gamma
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io.lcd_data_write_command_and_data(0xE1, {
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0x00, 0x1C, 0x1F, 0x02, 0x0F, 0x03, 0x35, 0x25,
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0x47, 0x04, 0x0C, 0x0B, 0x29, 0x2F, 0x05
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});
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// Exit Sleep
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io.lcd_data_write_command_and_data(0x11, {});
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chThdSleepMilliseconds(120);
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// Display on
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io.lcd_data_write_command_and_data(0x29, {});
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// Turn on Tearing Effect Line (TE) output signal.
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io.lcd_data_write_command_and_data(0x35, { 0b00000000 });
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}
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void lcd_set(const uint_fast8_t command, const uint_fast16_t start, const uint_fast16_t end) {
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io.lcd_data_write_command_and_data(command, {
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static_cast<uint8_t>(start >> 8), static_cast<uint8_t>(start & 0xff),
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static_cast<uint8_t>(end >> 8), static_cast<uint8_t>(end & 0xff)
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});
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}
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void lcd_ramwr_start() {
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io.lcd_data_write_command_and_data(0x2c, {});
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}
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void lcd_caset(const uint_fast16_t start_column, uint_fast16_t end_column) {
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lcd_set(0x2a, start_column, end_column);
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}
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void lcd_paset(const uint_fast16_t start_page, const uint_fast16_t end_page) {
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lcd_set(0x2b, start_page, end_page);
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}
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void lcd_start_ram_write(
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const ui::Point p,
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const ui::Size s
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) {
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lcd_caset(p.x, p.x + s.w - 1);
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lcd_paset(p.y, p.y + s.h - 1);
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lcd_ramwr_start();
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}
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void lcd_start_ram_write(
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const ui::Rect& r
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) {
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lcd_start_ram_write(r.pos, r.size);
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}
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void lcd_vertical_scrolling_definition(
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const uint_fast16_t top_fixed_area,
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const uint_fast16_t vertical_scrolling_area,
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const uint_fast16_t bottom_fixed_area
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) {
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io.lcd_data_write_command_and_data(0x33, {
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static_cast<uint8_t>(top_fixed_area >> 8),
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static_cast<uint8_t>(top_fixed_area & 0xff),
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static_cast<uint8_t>(vertical_scrolling_area >> 8),
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static_cast<uint8_t>(vertical_scrolling_area & 0xff),
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static_cast<uint8_t>(bottom_fixed_area >> 8),
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static_cast<uint8_t>(bottom_fixed_area & 0xff)
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});
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}
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void lcd_vertical_scrolling_start_address(
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const uint_fast16_t vertical_scrolling_pointer
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) {
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io.lcd_data_write_command_and_data(0x37, {
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static_cast<uint8_t>(vertical_scrolling_pointer >> 8),
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static_cast<uint8_t>(vertical_scrolling_pointer & 0xff)
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});
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}
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}
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void ILI9341::init() {
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lcd_reset();
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lcd_init();
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io.lcd_backlight(1);
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}
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void ILI9341::shutdown() {
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io.lcd_backlight(0);
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lcd_reset();
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}
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void ILI9341::fill_rectangle(ui::Rect r, const ui::Color c) {
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const auto r_clipped = r.intersect(screen_rect());
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if( !r_clipped.is_empty() ) {
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lcd_start_ram_write(r_clipped);
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size_t count = r_clipped.size.w * r_clipped.size.h;
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io.lcd_write_pixels(c, count);
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}
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}
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void ILI9341::fill_circle(
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const ui::Point center,
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const ui::Dim radius,
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const ui::Color foreground,
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const ui::Color background
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) {
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const uint32_t radius2 = radius * radius;
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for(int32_t y=-radius; y<radius; y++) {
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const int32_t y2 = y * y;
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for(int32_t x=-radius; x<radius; x++) {
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const int32_t x2 = x * x;
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const uint32_t d2 = x2 + y2;
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const bool inside = d2 < radius2;
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const auto color = inside ? foreground : background;
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draw_pixel({
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static_cast<ui::Coord>(x + center.x),
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static_cast<ui::Coord>(y + center.y)
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}, color);
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}
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}
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}
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void ILI9341::draw_pixel(
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const ui::Point p,
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const ui::Color color
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) {
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if( screen_rect().contains(p) ) {
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lcd_start_ram_write(p, { 1, 1 });
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io.lcd_write_pixel(color);
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}
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}
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void ILI9341::draw_pixels(
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const ui::Rect r,
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const ui::Color* const colors,
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const size_t count
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) {
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/* TODO: Assert that rectangle width x height < count */
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lcd_start_ram_write(r.pos, r.size);
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io.lcd_write_pixels(colors, count);
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}
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void ILI9341::draw_glyph(
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const ui::Point p,
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const ui::Glyph& glyph,
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const ui::Color foreground,
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const ui::Color background
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) {
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lcd_start_ram_write(p, glyph.size());
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const size_t count = glyph.w() * glyph.h();
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const auto pixels = glyph.pixels();
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for(size_t i=0; i<count; i++) {
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const auto pixel = pixels[i >> 3] & (1U << (i & 0x7));
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io.lcd_write_pixel(pixel ? foreground : background);
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}
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}
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void ILI9341::scroll_set_area(
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const ui::Coord top_y,
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const ui::Coord bottom_y
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) {
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scroll_state.top_area = top_y;
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scroll_state.bottom_area = height() - bottom_y;
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scroll_state.height = bottom_y - top_y;
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lcd_vertical_scrolling_definition(scroll_state.top_area, scroll_state.height, scroll_state.bottom_area);
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}
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ui::Coord ILI9341::scroll_set_position(
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const ui::Coord position
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) {
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scroll_state.current_position = position % scroll_state.height;
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const uint_fast16_t address = scroll_state.top_area + scroll_state.current_position;
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lcd_vertical_scrolling_start_address(address);
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return address;
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}
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ui::Coord ILI9341::scroll(const int32_t delta) {
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return scroll_set_position(scroll_state.current_position + scroll_state.height - delta);
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}
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ui::Coord ILI9341::scroll_area_y(const ui::Coord y) const {
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const auto wrapped_y = (scroll_state.current_position + y) % scroll_state.height;
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return wrapped_y + scroll_state.top_area;
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}
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void ILI9341::scroll_disable() {
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lcd_vertical_scrolling_definition(0, height(), 0);
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lcd_vertical_scrolling_start_address(0);
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}
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} /* namespace lcd */
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