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dgisselq |
////////////////////////////////////////////////////////////////////////////////
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//
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// Filename: oledsim.cpp
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//
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// Project: OpenArty, an entirely open SoC based upon the Arty platform
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//
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// Purpose: The goal of this module is very specifically to simulate the
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// PModOLEDrgb using a GTKMM controlled window. I'm doing this on
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// an Linux computer with X-Windows, although one GTKMM selling point is
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// that it should work in Windows as well. I won't vouch for that, as I
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// haven't tested under windows.
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//
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// Either way, this controller only implements *some* of the OLED commands.
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// There were just too many commands for me to be able to write them in the
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// short order that I needed to get a test up and running. Therefore, this
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// simulator will validate all commands and assure you they are valid
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// commands, but it will only respond to some. For specifics, see the
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// do_command() section below.
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//
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// You may notice a lot of assert() calls within this code. This is half
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// the purpose of the code: to verify that interactions, when the take
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// place, are valid. The sad problem and effect of this is simply that
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// when bugs are present, the error/warning messages are not that complete.
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// If you find yourself dealing with such an error, please feel free to
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// explain the assert better before asserting, and then send your
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// contributions back to me so that others can benefit from your work.
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// (Don't you love the GPL?)
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//
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// Creator: Dan Gisselquist, Ph.D.
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// Gisselquist Technology, LLC
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//
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////////////////////////////////////////////////////////////////////////////////
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//
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// Copyright (C) 2015-2016, Gisselquist Technology, LLC
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//
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// This program is free software (firmware): you can redistribute it and/or
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// modify it under the terms of the GNU General Public License as published
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// by the Free Software Foundation, either version 3 of the License, or (at
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// your option) any later version.
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//
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// This program is distributed in the hope that it will be useful, but WITHOUT
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// ANY WARRANTY; without even the implied warranty of MERCHANTIBILITY or
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// FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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// for more details.
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//
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// You should have received a copy of the GNU General Public License along
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// with this program. (It's in the $(ROOT)/doc directory, run make with no
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// target there if the PDF file isn't present.) If not, see
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// <http://www.gnu.org/licenses/> for a copy.
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//
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// License: GPL, v3, as defined and found on www.gnu.org,
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// http://www.gnu.org/licenses/gpl.html
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//
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//
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////////////////////////////////////////////////////////////////////////////////
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//
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//
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#include "oledsim.h"
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const int OLEDSIM::OLED_HEIGHT = 64, OLEDSIM::OLED_WIDTH = 96;
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const int MICROSECOND = 81,
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tMINRESET = 3 * MICROSECOND, // 3 uS
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tCYCLE = 13, // 150 * NANOSECOND, clock cycle time
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tAS = 4, // 40 * NANOSECOND, address setup time
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tAH = 4, // 40 * NANOSECOND, address hold time
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tCSS = 7, // 75 * NANOSECOND, chip select setup
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tCSH = 5, // 60 * NANOSECOND, chip select hold
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tCLKL = 7, // 75 * NANOSECOND, time the clock must be low
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tCLKH = 7; // 75 * NANOSECOND, time the clock must be high
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void OLEDSIM::on_realize() {
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Gtk::DrawingArea::on_realize();
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// We'll be doing all of our drawing on an off-screen bit map. Here,
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// let's allocate that pixel map ...
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m_pix = Cairo::ImageSurface::create(Cairo::FORMAT_RGB24,
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OLED_WIDTH, OLED_HEIGHT);
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// and a graphics context to be used when drawing to it.
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m_gc = Cairo::Context::create(m_pix);
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// We'll start the pixel map filled with all black, as this is what
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// my device looks like when I'm not doing anything with it.
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m_gc->set_source_rgb(0.0,0.0,0.0); // Black
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m_gc->rectangle(0, 0, OLED_WIDTH, OLED_HEIGHT);
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m_gc->fill();
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}
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void OLEDSIM::get_preferred_width_vfunc(int &min, int &nw) const {
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// GTKMM wants to know how big we want our window to be.
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// Let's request a window twice as big as we need, but insist that
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// it never be smaller than one pixel output per one pixel input.
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//
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min = OLED_WIDTH;
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nw = OLED_WIDTH * 2;
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}
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void OLEDSIM::get_preferred_height_vfunc(int &min, int &nw) const {
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//
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// Same thing as above, but this time for height, not width.
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//
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min = OLED_HEIGHT;
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nw = OLED_HEIGHT * 2;
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}
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void OLEDSIM::get_preferred_width_for_height_vfunc(int h, int &min, int &nw) const {
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min = OLED_WIDTH;
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int k = (h+(OLED_HEIGHT/2))/OLED_HEIGHT;
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if (k <= 0)
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k = 1;
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nw = OLED_WIDTH * k;
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}
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void OLEDSIM::get_preferred_height_for_width_vfunc(int w, int &min, int &nw) const {
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min = OLED_HEIGHT;
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int k = (w+(OLED_WIDTH/2))/OLED_WIDTH;
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if (k <= 0)
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k = 1;
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nw = OLED_HEIGHT * k;
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}
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/*
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* This is our simulation function. This is the function that gets called at
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* every tick of our controller within Verilator. At each tick (and not twice
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* per tick), the outputs are gathered and sent our way. Here, we just decode
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* the power and reset outputs, and send everything else to handle_io().
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*/
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void OLEDSIM::operator()(const int iopwr, const int rstn, const int dpwr,
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const int csn, const int sck, const int dcn, const int mosi) {
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if (!iopwr) {
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if (m_state != OLED_OFF) {
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m_state = OLED_OFF;
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clear_to(0.0);
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queue_draw_area(0,0,get_width(), get_height());
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}
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assert(!dpwr);
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} else if (!rstn) {
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if (m_state != OLED_RESET) {
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m_state = OLED_RESET;
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m_locked = true;
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clear_to(0.1);
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m_reset_clocks = 0;
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queue_draw_area(0,0,get_width(), get_height());
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} if (m_reset_clocks < tMINRESET)
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m_reset_clocks++;
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assert(csn);
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assert(sck);
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} else if (dpwr) {
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if (m_state != OLED_POWERED) {
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m_state = OLED_POWERED;
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queue_draw_area(0,0,get_width(), get_height());
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if (!csn) {
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printf("OLED-ERR: CSN=%d, SCK=%d, DCN=%d, MOSI=%d, from %d,%d,%d\n",
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csn, sck, dcn, mosi,
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m_last_csn, m_last_sck, m_last_dcn);
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}
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assert(csn); // Can't power up with SPI active.
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}
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handle_io(csn, sck, dcn, mosi);
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} else {
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if (m_state != OLED_VIO) {
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m_state = OLED_VIO;
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queue_draw_area(0,0,OLED_WIDTH, OLED_HEIGHT);
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}
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handle_io(csn, sck, dcn, mosi);
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}
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}
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/* handle_io()
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*
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* We only enter this function if the I/O is powered up and the device is out
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* of reset. The device may (or may not) be on. Our purpose here is to decode
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* the SPI commands into a byte sequence, kept in m_data with a length given by
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* m_idx. Once a command has completed, we call do_command() to actually
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* process the values received, the arguments, etc. and do something with them.
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*
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*/
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void OLEDSIM::handle_io(const int csn, const int sck, const int dcn, const int mosi) {
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if ((csn != m_last_csn)||(sck != m_last_sck)||(dcn != m_last_dcn))
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printf("OLED: HANDLE-IO(%d,%d,%d,%d) @[%d]%d\n",
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csn, sck, dcn, mosi, m_idx, m_bitpos);
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if (csn) {
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// CSN is high when the chip isn't selected.
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if (!m_last_csn) {
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// If the chip was just selected, it then means that our
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// command just completed. Let's process it here.
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printf("OLED: Ending a command\n");
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assert(m_idx > 0);
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assert((m_bitpos&7)==0);
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do_command(m_last_dcn, m_idx, m_data);
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m_bitpos = 0;
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m_idx = 0;
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for(int i=0; i<8; i++)
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m_data[i] = 0;
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assert(m_last_sck);
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} if (!sck)
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printf("OLED: CSN = %d, SCK = %d, DCN = %d, MOSI = %d, from %d, %d, %d\n",
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csn, sck, dcn, mosi,
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m_last_csn, m_last_sck, m_last_dcn);
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assert(sck);
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m_bitpos = 0;
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m_idx = 0;
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} else {
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if (m_last_csn) {
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assert((sck)&&(m_last_sck));
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assert(m_last_sck);
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printf("OLED: Starting a command\n");
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}
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/*
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if (m_last_dcn != dcn) {
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m_address_counts = 0;
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} m_address_counts++;
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*/
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if ((sck)&&(!m_last_sck)) {
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m_bitpos++;
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m_data[m_idx] = (m_data[m_idx]<<1)|mosi;
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printf("OLED: Accepted bit: m_data[%d] = %02x\n",
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m_idx, m_data[m_idx]);
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if (m_bitpos >= 8) {
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m_idx++;
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m_bitpos &= 7;
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}
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assert(m_idx < 3+4+4);
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// assert(m_address_count > tCSS);
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} else if ((!sck)&&(m_last_sck)) {
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}
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}
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m_last_csn = csn;
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m_last_sck = sck;
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m_last_dcn = dcn;
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}
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void OLEDSIM::do_command(const int dcn, const int len, char *data) {
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assert(len > 0);
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assert(len <= 11);
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printf("OLED: RECEIVED CMD(%02x) ", data[0]&0x0ff);
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if (len > 1) {
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printf(" - ");
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for(int i=1; i<len-1; i++)
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printf("%02x:", data[i]&0x0ff);
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printf("%02x", data[len-1]&0x0ff);
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printf("\n");
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}
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| 252 |
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if (dcn) {
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| 253 |
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// Do something with the pixmap
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double dr, dg, db;
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| 255 |
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| 256 |
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if (m_format == OLED_65kCLR) {
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| 257 |
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int r, g, b;
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assert(len == 2);
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r = (data[0]>>3)&0x01f;
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g = ((data[0]<<3)&0x038)|((data[1]>>5)&0x07);
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| 261 |
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b = ((data[1] )&0x01f);
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| 262 |
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dr = r / 31.0;
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dg = g / 63.0;
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db = b / 31.0;
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| 266 |
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} else {
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| 267 |
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printf("OLED: UNSUPPORTED COLOR FORMAT!\n");
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| 268 |
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dr = dg = db = 0.0;
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| 269 |
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} set_gddram(m_col, m_row, dr, dg, db);
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| 270 |
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if (!m_vaddr_inc) {
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| 271 |
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m_col++;
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| 272 |
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if (m_col > m_col_end) {
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| 273 |
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m_col = m_col_start;
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| 274 |
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m_row++;
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| 275 |
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if (m_row > m_row_end)
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| 276 |
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m_row = m_row_start;
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| 277 |
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}
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| 278 |
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} else {
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| 279 |
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m_row++;
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| 280 |
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if (m_row > m_row_end) {
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| 281 |
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m_row = m_row_start;
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| 282 |
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m_col++;
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| 283 |
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if (m_col > m_col_end)
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| 284 |
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m_col = m_col_start;
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| 285 |
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}
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| 286 |
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}
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| 287 |
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} else if (m_locked) {
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| 288 |
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if ((len == 2)&&((data[0]&0x0ff) == 0x0fd)&&(data[1] == 0x12)) {
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| 289 |
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m_locked = false;
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| 290 |
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printf("OLED: COMMANDS UNLOCKED\n");
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| 291 |
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} else {
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| 292 |
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printf("OLED: COMMAND IGNORED, IC LOCKED\n");
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| 293 |
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}
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| 294 |
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} else {
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| 295 |
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// Command word
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| 296 |
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switch((data[0])&0x0ff) {
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| 297 |
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case 0x15: // Setup column start and end address
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| 298 |
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assert(len == 3);
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| 299 |
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assert((data[1]&0x0ff) <= 95);
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| 300 |
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assert((data[2]&0x0ff) <= 95);
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| 301 |
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m_col_start = data[1]&0x0ff;
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| 302 |
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m_col_end = data[2]&0x0ff;
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| 303 |
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assert(m_col_end >= m_col_start);
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| 304 |
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m_col = m_col_start;
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| 305 |
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break;
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| 306 |
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case 0x75: // Setup row start and end address
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| 307 |
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assert(len == 3);
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| 308 |
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assert((data[1]&0x0ff) <= 63);
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| 309 |
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assert((data[2]&0x0ff) <= 63);
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| 310 |
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assert(m_row_end >= m_row_start);
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| 311 |
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m_row_start = data[1]&0x0ff;
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| 312 |
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m_row_end = data[2]&0x0ff;
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| 313 |
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break;
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| 314 |
|
|
case 0x81: // Set constrast for all color "A" segment
|
| 315 |
|
|
assert(len == 2);
|
| 316 |
|
|
break;
|
| 317 |
|
|
case 0x82: // Set constrast for all color "B" segment
|
| 318 |
|
|
assert(len == 2);
|
| 319 |
|
|
break;
|
| 320 |
|
|
case 0x83: // Set constrast for all color "C" segment
|
| 321 |
|
|
assert(len == 2);
|
| 322 |
|
|
break;
|
| 323 |
|
|
case 0x87: // Set master current attenuation factor
|
| 324 |
|
|
assert(len == 2);
|
| 325 |
|
|
break;
|
| 326 |
|
|
case 0x8a: // Set second pre-charge speed, color A
|
| 327 |
|
|
assert(len == 2);
|
| 328 |
|
|
break;
|
| 329 |
|
|
case 0x8b: // Set second pre-charge speed, color B
|
| 330 |
|
|
assert(len == 2);
|
| 331 |
|
|
break;
|
| 332 |
|
|
case 0x8c: // Set second pre-charge speed, color C
|
| 333 |
|
|
assert(len == 2);
|
| 334 |
|
|
break;
|
| 335 |
|
|
case 0xa0: // Set driver remap and color depth
|
| 336 |
|
|
assert(len == 2);
|
| 337 |
|
|
m_vaddr_inc = (data[1]&1)?true:false;
|
| 338 |
|
|
// m_fliplr = (data[1]&2)?true:false;
|
| 339 |
|
|
if ((data[1] & 0x0c0)==0)
|
| 340 |
|
|
m_format = OLED_256CLR;
|
| 341 |
|
|
else if ((data[1] & 0x0c0)==0x40)
|
| 342 |
|
|
m_format = OLED_65kCLR;
|
| 343 |
|
|
// else if ((data[1] & 0x0c0)==0x80)
|
| 344 |
|
|
// m_format = OLED_65kCLRTWO;
|
| 345 |
|
|
|
| 346 |
|
|
break;
|
| 347 |
|
|
case 0xa1: // Set display start line register by row
|
| 348 |
|
|
assert(len == 2);
|
| 349 |
|
|
break;
|
| 350 |
|
|
case 0xa2: // Set vertical offset by com
|
| 351 |
|
|
assert(len == 2);
|
| 352 |
|
|
break;
|
| 353 |
|
|
case 0xa4: // Set display mode
|
| 354 |
|
|
case 0xa5: // Fallthrough
|
| 355 |
|
|
case 0xa6: // Fallthrough
|
| 356 |
|
|
case 0xa7: // Fallthrough
|
| 357 |
|
|
assert(len == 1);
|
| 358 |
|
|
break;
|
| 359 |
|
|
case 0xa8: // Set multiplex ratio
|
| 360 |
|
|
assert(len == 2);
|
| 361 |
|
|
break;
|
| 362 |
|
|
case 0xab: // Dim Mode setting
|
| 363 |
|
|
assert(len == 6);
|
| 364 |
|
|
break;
|
| 365 |
|
|
case 0xad:
|
| 366 |
|
|
assert(len == 2);
|
| 367 |
|
|
assert((data[1]&0x0fe)==0x08e);
|
| 368 |
|
|
break;
|
| 369 |
|
|
case 0xac:
|
| 370 |
|
|
case 0xae:
|
| 371 |
|
|
case 0xaf:
|
| 372 |
|
|
assert(len == 1);
|
| 373 |
|
|
break;
|
| 374 |
|
|
case 0xb0: // Power save mode
|
| 375 |
|
|
assert((len == 2)&&((data[1] == 0x1a)||(data[1] == 0x0b)));
|
| 376 |
|
|
break;
|
| 377 |
|
|
case 0xb1: // Phase 1 and 2 period adjustment
|
| 378 |
|
|
assert(len == 2);
|
| 379 |
|
|
break;
|
| 380 |
|
|
case 0xb3: // Displaky clock divider/oscillator frequency
|
| 381 |
|
|
assert(len == 2);
|
| 382 |
|
|
break;
|
| 383 |
|
|
case 0xb8: // Set gray scale table
|
| 384 |
|
|
assert(0 && "Gray scale table not implemented");
|
| 385 |
|
|
break;
|
| 386 |
|
|
case 0xb9: // Enable Linear Gray Scale table
|
| 387 |
|
|
assert(len == 1);
|
| 388 |
|
|
break;
|
| 389 |
|
|
case 0xbb: // Set pre-charge level
|
| 390 |
|
|
assert(len == 2);
|
| 391 |
|
|
break;
|
| 392 |
|
|
case 0xbc: // NOP
|
| 393 |
|
|
case 0xbd: // NOP
|
| 394 |
|
|
assert(len == 1);
|
| 395 |
|
|
case 0xbe: // Set V_COMH
|
| 396 |
|
|
assert(len == 2);
|
| 397 |
|
|
break;
|
| 398 |
|
|
case 0xe3: // NOP
|
| 399 |
|
|
assert(len == 1);
|
| 400 |
|
|
break;
|
| 401 |
|
|
case 0xfd: // Set command lock
|
| 402 |
|
|
assert(len == 2);
|
| 403 |
|
|
if (data[1] == 0x16) {
|
| 404 |
|
|
m_locked = true;
|
| 405 |
|
|
printf("OLED: COMMANDS NOW LOCKED\n");
|
| 406 |
|
|
}
|
| 407 |
|
|
break;
|
| 408 |
|
|
case 0x21: // Draw Line
|
| 409 |
|
|
assert(len == 8);
|
| 410 |
|
|
break;
|
| 411 |
|
|
case 0x22: // Draw Rectangle
|
| 412 |
|
|
assert(len == 11);
|
| 413 |
|
|
break;
|
| 414 |
|
|
case 0x23: // Copy
|
| 415 |
|
|
assert(len == 7);
|
| 416 |
|
|
break;
|
| 417 |
|
|
case 0x24: // Dim Window
|
| 418 |
|
|
assert(len == 5);
|
| 419 |
|
|
break;
|
| 420 |
|
|
case 0x25: // Clear Window
|
| 421 |
|
|
assert(len == 5);
|
| 422 |
|
|
break;
|
| 423 |
|
|
case 0x26: // Fill Enable/Disable
|
| 424 |
|
|
assert(len == 2);
|
| 425 |
|
|
// if (data[0]&1)
|
| 426 |
|
|
// m_drect_fills = 1;
|
| 427 |
|
|
assert((data[1] & 0x10)==0);
|
| 428 |
|
|
break;
|
| 429 |
|
|
case 0x27: // Continuous horizontal and vertical scrolling setup
|
| 430 |
|
|
assert(len == 6);
|
| 431 |
|
|
break;
|
| 432 |
|
|
case 0x2e: // Deactivate scrolling
|
| 433 |
|
|
assert(len == 1);
|
| 434 |
|
|
// m_scrolling = false;
|
| 435 |
|
|
break;
|
| 436 |
|
|
case 0x2f: // Activate scrolling
|
| 437 |
|
|
assert(len == 1);
|
| 438 |
|
|
// m_scrolling = true;
|
| 439 |
|
|
break;
|
| 440 |
|
|
default:
|
| 441 |
|
|
printf("OLED: UNKNOWN COMMAND, data[0] = %02x\n", data[0] & 0x0ff);
|
| 442 |
|
|
assert(0);
|
| 443 |
|
|
break;
|
| 444 |
|
|
}
|
| 445 |
|
|
}
|
| 446 |
|
|
}
|
| 447 |
|
|
|
| 448 |
|
|
/*
|
| 449 |
|
|
* set_gddram()
|
| 450 |
|
|
*
|
| 451 |
|
|
* Set graphics display DRAM.
|
| 452 |
|
|
*
|
| 453 |
|
|
* Here is the heart of drawing on the device, or at least pixel level drawing.
|
| 454 |
|
|
* The device allows other types of drawing, such as filling rectangles and
|
| 455 |
|
|
* such. Here, we just handle the setting of pixels.
|
| 456 |
|
|
*
|
| 457 |
|
|
* You'll note that updates to the drawing area are only queued if the device
|
| 458 |
|
|
* is in powered mode.
|
| 459 |
|
|
*
|
| 460 |
|
|
* At some point, I may wish to implement scrolling. If/when that happens,
|
| 461 |
|
|
* the GDDRAM will not be affected, but the area that needs to be redrawn will
|
| 462 |
|
|
* be. Hence this routine will need to be adjusted at that time.
|
| 463 |
|
|
*/
|
| 464 |
|
|
void OLEDSIM::set_gddram(const int col, const int row,
|
| 465 |
|
|
const double dr, const double dg, const double db) {
|
| 466 |
|
|
// Set our color to that given by the rgb (double) parameters.
|
| 467 |
|
|
m_gc->set_source_rgb(dr, dg, db);
|
| 468 |
|
|
|
| 469 |
|
|
printf("OLED: Setting pixel[%2d,%2d]\n", col, row);
|
| 470 |
|
|
int drow; // dcol;
|
| 471 |
|
|
drow = row + m_display_start_row;
|
| 472 |
|
|
if (drow >= OLED_HEIGHT)
|
| 473 |
|
|
drow -= OLED_HEIGHT;
|
| 474 |
|
|
m_gc->rectangle(col, row, 1, 1);
|
| 475 |
|
|
m_gc->fill();
|
| 476 |
|
|
|
| 477 |
|
|
if (m_state == OLED_POWERED) {
|
| 478 |
|
|
// Need to adjust the invalidated area if scrolling is taking
|
| 479 |
|
|
// place.
|
| 480 |
|
|
double kw, kh;
|
| 481 |
|
|
kw = get_width()/(double)OLED_WIDTH;
|
| 482 |
|
|
kh = get_height()/(double)OLED_HEIGHT;
|
| 483 |
|
|
queue_draw_area(col*kw, row*kh, (int)(kw+0.5), (int)(kh+0.5));
|
| 484 |
|
|
}
|
| 485 |
|
|
}
|
| 486 |
|
|
|
| 487 |
|
|
/*
|
| 488 |
|
|
* clear_to()
|
| 489 |
|
|
*
|
| 490 |
|
|
* Clears the simulated device to a known grayscale value. Examples are
|
| 491 |
|
|
* 0.0 for black, or 0.1 for a gray that is nearly black. Note that this
|
| 492 |
|
|
* call does *not* invalidate our window. Perhaps it should, but for now that
|
| 493 |
|
|
* is the responsibility of whatever function calls this function.
|
| 494 |
|
|
*/
|
| 495 |
|
|
void OLEDSIM::clear_to(double v) {
|
| 496 |
|
|
// How do we apply this to our pixmap?
|
| 497 |
|
|
m_gc->set_source_rgb(v, v, v);
|
| 498 |
|
|
m_gc->rectangle(0, 0, OLED_WIDTH, OLED_HEIGHT);
|
| 499 |
|
|
m_gc->fill();
|
| 500 |
|
|
}
|
| 501 |
|
|
|
| 502 |
|
|
bool OLEDSIM::on_draw(CONTEXT &gc) {
|
| 503 |
|
|
gc->save();
|
| 504 |
|
|
if (m_state == OLED_POWERED) {
|
| 505 |
|
|
// Scrolling will be implemented here
|
| 506 |
|
|
gc->set_source(m_pix, 0, 0);
|
| 507 |
|
|
gc->scale(get_width()/(double)OLED_WIDTH,
|
| 508 |
|
|
get_height()/(double)OLED_HEIGHT);
|
| 509 |
|
|
gc->paint();
|
| 510 |
|
|
} else {
|
| 511 |
|
|
if ((m_state == OLED_VIO)||(m_state == OLED_RESET))
|
| 512 |
|
|
gc->set_source_rgb(0.1,0.1,0.1); // DARK gray
|
| 513 |
|
|
else
|
| 514 |
|
|
gc->set_source_rgb(0.0,0.0,0.0); // Black
|
| 515 |
|
|
// gc->rectangle(0, 0, OLED_WIDTH, OLED_HEIGHT);
|
| 516 |
|
|
gc->rectangle(0, 0, get_width(), get_height());
|
| 517 |
|
|
gc->fill();
|
| 518 |
|
|
} gc->restore();
|
| 519 |
|
|
|
| 520 |
|
|
return true;
|
| 521 |
|
|
}
|
| 522 |
|
|
|
| 523 |
|
|
OLEDWIN::OLEDWIN(void) {
|
| 524 |
|
|
m_sim = new OLEDSIM();
|
| 525 |
|
|
m_sim->set_size_request(OLEDSIM::OLED_WIDTH, OLEDSIM::OLED_HEIGHT);
|
| 526 |
|
|
set_border_width(0);
|
| 527 |
|
|
add(*m_sim);
|
| 528 |
|
|
show_all();
|
| 529 |
|
|
Gtk::Window::set_title(Glib::ustring("OLED Simulator"));
|
| 530 |
|
|
}
|
| 531 |
|
|
|
