diff options
Diffstat (limited to 'drivers/tdisp/HD44780/tdisp_lld.c')
-rw-r--r-- | drivers/tdisp/HD44780/tdisp_lld.c | 328 |
1 files changed, 164 insertions, 164 deletions
diff --git a/drivers/tdisp/HD44780/tdisp_lld.c b/drivers/tdisp/HD44780/tdisp_lld.c index 8a9c886f..32b2b8c9 100644 --- a/drivers/tdisp/HD44780/tdisp_lld.c +++ b/drivers/tdisp/HD44780/tdisp_lld.c @@ -1,164 +1,164 @@ -/*
- ChibiOS/GFX - Copyright (C) 2012
- Joel Bodenmann aka Tectu <joel@unormal.org>
-
- This file is part of ChibiOS/GFX.
-
- ChibiOS/GFX 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 3 of the License, or
- (at your option) any later version.
-
- ChibiOS/GFX 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, see <http://www.gnu.org/licenses/>.
-*/
-
-/**
- * @file drivers/tdisp/HD44780/tdisp_lld.c
- * @brief TDISP driver subsystem low level driver source for the HD44780 display
- *
- * @addtogroup TDISP
- * @{
- */
-
-#include "ch.h"
-#include "hal.h"
-#include "gfx.h"
-
-#if GFX_USE_TDISP /*|| defined(__DOXYGEN__)*/
-
-/* The user may override the default display size */
-#ifndef TDISP_COLUMNS
- #define TDISP_COLUMNS 16
-#endif
-#ifndef TDISP_ROWS
- #define TDISP_ROWS 2
-#endif
-
-/* Controller Specific Properties */
-#define CUSTOM_CHAR_COUNT 8
-#define CUSTOM_CHAR_XBITS 5
-#define CUSTOM_CHAR_YBITS 8
-
-/* Define the properties of our controller */
-tdispStruct TDISP = {
- TDISP_COLUMNS, TDISP_ROWS, /* cols, rows */
- CUSTOM_CHAR_XBITS, CUSTOM_CHAR_YBITS, /* charBitsX, charBitsY */
- CUSTOM_CHAR_COUNT /* maxCustomChars */
- };
-
-/* Include the hardware interface details */
-#if defined(TDISP_USE_CUSTOM_BOARD) && TDISP_USE_CUSTOM_BOARD
- /* Include the user supplied board definitions */
- #include "tdisp_lld_board.h"
-#elif defined(BOARD_UNKNOWN)
- #include "gdisp_lld_board_unknown.h"
-#else
- /* Include the user supplied board definitions */
- #include "gdisp_lld_board.h"
-#endif
-
-/* Our display control */
-#define DISPLAY_ON 0x04
-#define CURSOR_ON 0x02
-#define CURSOR_BLINK 0x01
-
-static uint8_t displaycontrol;
-
-
-bool_t tdisp_lld_init(void) {
- /* initialise hardware */
- init_board();
-
- /* wait some time */
- chThdSleepMilliseconds(50);
-
- write_cmd(0x38);
- chThdSleepMilliseconds(64);
-
- displaycontrol = DISPLAY_ON | CURSOR_ON | CURSOR_BLINK; // The default displaycontrol
- write_cmd(0x08 | displaycontrol);
- chThdSleepMicroseconds(50);
-
- write_cmd(0x01); // Clear the screen
- chThdSleepMilliseconds(5);
-
- write_cmd(0x06);
- chThdSleepMicroseconds(50);
-
- return TRUE;
-}
-
-void tdisp_lld_clear(void) {
- write_cmd(0x01);
-}
-
-void tdisp_lld_draw_char(char c) {
- write_data(c);
-}
-
-void tdisp_lld_set_cursor(coord_t col, coord_t row) {
- static const uint8_t row_offsets[] = { 0x00, 0x40, 0x14, 0x54 };
-
- /*
- * Short-cut:
- *
- * If x and y = 0 then use the home command.
- *
- * Note: There is probably no advantage as both commands are a single byte
- */
-// if (col == 0 && row == 0) {
-// write_cmd(0x02);
-// return;
-// }
-
- write_cmd(0x80 | (col + row_offsets[row]));
-}
-
-void tdisp_lld_create_char(uint8_t address, uint8_t *charmap) {
- int i;
-
- write_cmd(0x40 | (address << 3));
- for(i = 0; i < CUSTOM_CHAR_YBITS; i++)
- write_data(charmap[i]);
-}
-
-void tdisp_lld_control(uint16_t what, void *value) {
- switch(what) {
- case TDISP_CTRL_BACKLIGHT:
- if ((uint8_t)value)
- displaycontrol |= DISPLAY_ON;
- else
- displaycontrol &= ~DISPLAY_ON;
- write_cmd(0x08 | displaycontrol);
- break;
- case TDISP_CTRL_CURSOR:
- switch((cursorshape)value) {
- case cursorOff:
- displaycontrol &= ~CURSOR_ON;
- break;
- case cursorBlock:
- case cursorUnderline:
- case cursorBar:
- displaycontrol = (displaycontrol | CURSOR_ON) & ~CURSOR_BLINK;
- break;
- case cursorBlinkingBlock:
- case cursorBlinkingUnderline:
- case cursorBlinkingBar:
- default:
- displaycontrol |= (CURSOR_ON | CURSOR_BLINK);
- break;
- }
- write_cmd(0x08 | displaycontrol);
- break;
- }
-}
-
-#endif /* GFX_USE_TDISP */
-/** @} */
-
+/* + ChibiOS/GFX - Copyright (C) 2012 + Joel Bodenmann aka Tectu <joel@unormal.org> + + This file is part of ChibiOS/GFX. + + ChibiOS/GFX 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 3 of the License, or + (at your option) any later version. + + ChibiOS/GFX 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, see <http://www.gnu.org/licenses/>. +*/ + +/** + * @file drivers/tdisp/HD44780/tdisp_lld.c + * @brief TDISP driver subsystem low level driver source for the HD44780 display + * + * @addtogroup TDISP + * @{ + */ + +#include "ch.h" +#include "hal.h" +#include "gfx.h" + +#if GFX_USE_TDISP /*|| defined(__DOXYGEN__)*/ + +/* Include the hardware interface details */ +#if defined(TDISP_USE_CUSTOM_BOARD) && TDISP_USE_CUSTOM_BOARD + /* Include the user supplied board definitions */ + #include "tdisp_lld_board.h" +#elif defined(BOARD_UNKNOWN) + #include "gdisp_lld_board_unknown.h" +#else + /* Include the user supplied board definitions */ + #include "gdisp_lld_board.h" +#endif + +/* The user may override the default display size */ +#ifndef TDISP_COLUMNS + #define TDISP_COLUMNS 16 +#endif +#ifndef TDISP_ROWS + #define TDISP_ROWS 2 +#endif + +/* Controller Specific Properties */ +#define CUSTOM_CHAR_COUNT 8 +#define CUSTOM_CHAR_XBITS 5 +#define CUSTOM_CHAR_YBITS 8 + +/* Define the properties of our controller */ +tdispStruct TDISP = { + TDISP_COLUMNS, TDISP_ROWS, /* cols, rows */ + CUSTOM_CHAR_XBITS, CUSTOM_CHAR_YBITS, /* charBitsX, charBitsY */ + CUSTOM_CHAR_COUNT /* maxCustomChars */ + }; + +/* Our display control */ +#define DISPLAY_ON 0x04 +#define CURSOR_ON 0x02 +#define CURSOR_BLINK 0x01 + +static uint8_t displaycontrol; + + +bool_t tdisp_lld_init(void) { + /* initialise hardware */ + init_board(); + + /* wait some time */ + chThdSleepMilliseconds(50); + + write_cmd(0x38); + chThdSleepMilliseconds(64); + + displaycontrol = DISPLAY_ON | CURSOR_ON | CURSOR_BLINK; // The default displaycontrol + write_cmd(0x08 | displaycontrol); + chThdSleepMicroseconds(50); + + write_cmd(0x01); // Clear the screen + chThdSleepMilliseconds(5); + + write_cmd(0x06); + chThdSleepMicroseconds(50); + + return TRUE; +} + +void tdisp_lld_clear(void) { + write_cmd(0x01); +} + +void tdisp_lld_draw_char(char c) { + write_data(c); +} + +void tdisp_lld_set_cursor(coord_t col, coord_t row) { + static const uint8_t row_offsets[] = { 0x00, 0x40, 0x14, 0x54 }; + + /* + * Short-cut: + * + * If x and y = 0 then use the home command. + * + * Note: There is probably no advantage as both commands are a single byte + */ +// if (col == 0 && row == 0) { +// write_cmd(0x02); +// return; +// } + + write_cmd(0x80 | (col + row_offsets[row])); +} + +void tdisp_lld_create_char(uint8_t address, uint8_t *charmap) { + int i; + + write_cmd(0x40 | (address << 3)); + for(i = 0; i < CUSTOM_CHAR_YBITS; i++) + write_data(charmap[i]); +} + +void tdisp_lld_control(uint16_t what, void *value) { + switch(what) { + case TDISP_CTRL_BACKLIGHT: + if ((uint8_t)value) + displaycontrol |= DISPLAY_ON; + else + displaycontrol &= ~DISPLAY_ON; + write_cmd(0x08 | displaycontrol); + break; + case TDISP_CTRL_CURSOR: + switch((cursorshape)value) { + case cursorOff: + displaycontrol &= ~CURSOR_ON; + break; + case cursorBlock: + case cursorUnderline: + case cursorBar: + displaycontrol = (displaycontrol | CURSOR_ON) & ~CURSOR_BLINK; + break; + case cursorBlinkingBlock: + case cursorBlinkingUnderline: + case cursorBlinkingBar: + default: + displaycontrol |= (CURSOR_ON | CURSOR_BLINK); + break; + } + write_cmd(0x08 | displaycontrol); + break; + } +} + +#endif /* GFX_USE_TDISP */ +/** @} */ + |