94 lines
2.6 KiB
C++
94 lines
2.6 KiB
C++
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/*
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* Copyright (C) 2006 Paul Davis
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* Copyright (C) 2007 Michael Taht
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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 of the License, or
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* (at 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,
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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; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*
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* */
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#include <tranzport_control_protocol.h>
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void
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TranzportControlProtocol::screen_clear ()
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{
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const char *blank = " ";
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print(0,0,blank);
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print(1,0,blank);
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}
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void TranzportControlProtocol::screen_invalidate ()
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{
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screen_invalid.set();
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for(int row = 0; row < ROWS; row++) {
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for(int col = 0; col < COLUMNS; col++) {
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screen_current[row][col] = 0x7f;
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screen_pending[row][col] = ' ';
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screen_flash[row][col] = ' ';
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}
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}
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}
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void TranzportControlProtocol::screen_validate ()
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{
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}
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void TranzportControlProtocol::screen_init ()
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{
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screen_invalidate();
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}
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// FIXME: Switch to a column oriented flush to make the redraw of the
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// meters look better
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int
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TranzportControlProtocol::screen_flush ()
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{
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int cell = 0, row=0, col_base, pending = 0;
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const unsigned long CELL_BITS = 0x0F;
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if ( _device_status == STATUS_OFFLINE) { return (-1); }
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std::bitset<ROWS*COLUMNS> mask(CELL_BITS);
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std::bitset<ROWS*COLUMNS> imask(CELL_BITS);
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for(cell = 0; cell < 10 && pending == 0; cell++) {
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mask = imask << (cell*4);
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if((screen_invalid & mask).any()) {
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/* something in this cell is different, so dump the cell to the device. */
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#if DEBUG_TRANZPORT_SCREEN
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printf("MASK : %s\n", mask.to_string().c_str());
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#endif
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if(cell > 4) { row = 1; } else { row = 0; }
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col_base = (cell*4)%COLUMNS;
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uint8_t cmd[8];
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cmd[0] = 0x00;
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cmd[1] = 0x01;
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cmd[2] = cell;
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cmd[3] = screen_pending[row][col_base];
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cmd[4] = screen_pending[row][col_base+1];
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cmd[5] = screen_pending[row][col_base+2];
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cmd[6] = screen_pending[row][col_base+3];
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cmd[7] = 0x00;
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if((pending = lcd_write(cmd)) == 0) {
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/* successful write: copy to current cached display */
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screen_invalid &= mask.flip();
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memcpy (&screen_current[row][col_base], &screen_pending[row][col_base], 4);
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}
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}
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}
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return pending;
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}
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