diff options
Diffstat (limited to 'libs/surfaces/tranzport/screen.cc')
| -rw-r--r-- | libs/surfaces/tranzport/screen.cc | 93 |
1 files changed, 93 insertions, 0 deletions
diff --git a/libs/surfaces/tranzport/screen.cc b/libs/surfaces/tranzport/screen.cc new file mode 100644 index 0000000000..51062de3ad --- /dev/null +++ b/libs/surfaces/tranzport/screen.cc @@ -0,0 +1,93 @@ +/* + * Copyright (C) 2006 Paul Davis + * Copyright (C) 2007 Michael Taht + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + * + * */ + +#include <tranzport_control_protocol.h> + +void +TranzportControlProtocol::screen_clear () +{ + const char *blank = " "; + print(0,0,blank); + print(1,0,blank); +} + +void TranzportControlProtocol::screen_invalidate () +{ + screen_invalid.set(); + for(int row = 0; row < ROWS; row++) { + for(int col = 0; col < COLUMNS; col++) { + screen_current[row][col] = 0x7f; + screen_pending[row][col] = ' '; + screen_flash[row][col] = ' '; + } + } +} + +void TranzportControlProtocol::screen_validate () +{ +} + +void TranzportControlProtocol::screen_init () +{ + screen_invalidate(); +} + +// FIXME: Switch to a column oriented flush to make the redraw of the +// meters look better + +int +TranzportControlProtocol::screen_flush () +{ + int cell = 0, row=0, col_base, pending = 0; + const unsigned long CELL_BITS = 0x0F; + if ( _device_status == STATUS_OFFLINE) { return (-1); } + + std::bitset<ROWS*COLUMNS> mask(CELL_BITS); + std::bitset<ROWS*COLUMNS> imask(CELL_BITS); + for(cell = 0; cell < 10 && pending == 0; cell++) { + mask = imask << (cell*4); + if((screen_invalid & mask).any()) { + /* something in this cell is different, so dump the cell to the device. */ +#if DEBUG_TRANZPORT_SCREEN + printf("MASK : %s\n", mask.to_string().c_str()); +#endif + if(cell > 4) { row = 1; } else { row = 0; } + col_base = (cell*4)%COLUMNS; + + uint8_t cmd[8]; + cmd[0] = 0x00; + cmd[1] = 0x01; + cmd[2] = cell; + cmd[3] = screen_pending[row][col_base]; + cmd[4] = screen_pending[row][col_base+1]; + cmd[5] = screen_pending[row][col_base+2]; + cmd[6] = screen_pending[row][col_base+3]; + cmd[7] = 0x00; + + if((pending = lcd_write(cmd)) == 0) { + /* successful write: copy to current cached display */ + screen_invalid &= mask.flip(); + memcpy (&screen_current[row][col_base], &screen_pending[row][col_base], 4); + } + } + } + return pending; +} + |