163 lines
3.8 KiB
C
163 lines
3.8 KiB
C
/*
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ChibiOS/GFX - Copyright (C) 2012, 2013
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Joel Bodenmann aka Tectu <joel@unormal.org>
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This file is part of ChibiOS/GFX.
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ChibiOS/GFX 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 3 of the License, or
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(at your option) any later version.
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ChibiOS/GFX 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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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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/**
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* @file drivers/tdisp/HD44780/tdisp_lld.c
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* @brief TDISP driver subsystem low level driver source for the HD44780 display
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*
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* @addtogroup TDISP
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* @{
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*/
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#include "ch.h"
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#include "hal.h"
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#include "gfx.h"
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#if GFX_USE_TDISP /*|| defined(__DOXYGEN__)*/
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/* Include the hardware interface details */
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#if defined(BOARD_OLIMEX_STM32_E407)
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#include "tdisp_lld_board_olimex_e407.h"
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#elif defined(BOARD_ST_STM32F4_DISCOVERY)
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#include "tdisp_lld_board_st_stm32f4_discovery.h"
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#else
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#include "tdisp_lld_board_example.h"
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#endif
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/* The user may override the default display size */
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#ifndef TDISP_COLUMNS
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#define TDISP_COLUMNS 16
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#endif
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#ifndef TDISP_ROWS
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#define TDISP_ROWS 2
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#endif
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/* Controller Specific Properties */
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#define CUSTOM_CHAR_COUNT 8
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#define CUSTOM_CHAR_XBITS 5
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#define CUSTOM_CHAR_YBITS 8
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/* Define the properties of our controller */
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tdispStruct TDISP = {
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TDISP_COLUMNS, TDISP_ROWS, /* cols, rows */
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CUSTOM_CHAR_XBITS, CUSTOM_CHAR_YBITS, /* charBitsX, charBitsY */
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CUSTOM_CHAR_COUNT /* maxCustomChars */
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};
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/* Our display control */
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#define DISPLAY_ON 0x04
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#define CURSOR_ON 0x02
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#define CURSOR_BLINK 0x01
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static uint8_t displaycontrol;
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bool_t tdisp_lld_init(void) {
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/* initialise hardware */
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init_board();
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/* wait some time */
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chThdSleepMilliseconds(50);
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write_cmd(0x38);
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chThdSleepMilliseconds(64);
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displaycontrol = DISPLAY_ON | CURSOR_ON | CURSOR_BLINK; // The default displaycontrol
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write_cmd(0x08 | displaycontrol);
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chThdSleepMicroseconds(50);
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write_cmd(0x01); // Clear the screen
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chThdSleepMilliseconds(5);
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write_cmd(0x06);
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chThdSleepMicroseconds(50);
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return TRUE;
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}
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void tdisp_lld_clear(void) {
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write_cmd(0x01);
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}
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void tdisp_lld_draw_char(char c) {
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write_data(c);
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}
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void tdisp_lld_set_cursor(coord_t col, coord_t row) {
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static const uint8_t row_offsets[] = { 0x00, 0x40, 0x14, 0x54 };
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/*
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* Short-cut:
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*
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* If x and y = 0 then use the home command.
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*
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* Note: There is probably no advantage as both commands are a single byte
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*/
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// if (col == 0 && row == 0) {
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// write_cmd(0x02);
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// return;
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// }
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write_cmd(0x80 | (col + row_offsets[row]));
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}
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void tdisp_lld_create_char(uint8_t address, uint8_t *charmap) {
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int i;
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write_cmd(0x40 | (address << 3));
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for(i = 0; i < CUSTOM_CHAR_YBITS; i++)
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write_data(charmap[i]);
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}
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void tdisp_lld_control(uint16_t what, void *value) {
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switch(what) {
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case TDISP_CTRL_BACKLIGHT:
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if ((uint8_t)value)
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displaycontrol |= DISPLAY_ON;
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else
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displaycontrol &= ~DISPLAY_ON;
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write_cmd(0x08 | displaycontrol);
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break;
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case TDISP_CTRL_CURSOR:
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switch((cursorshape)value) {
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case cursorOff:
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displaycontrol &= ~CURSOR_ON;
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break;
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case cursorBlock:
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case cursorUnderline:
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case cursorBar:
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displaycontrol = (displaycontrol | CURSOR_ON) & ~CURSOR_BLINK;
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break;
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case cursorBlinkingBlock:
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case cursorBlinkingUnderline:
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case cursorBlinkingBar:
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default:
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displaycontrol |= (CURSOR_ON | CURSOR_BLINK);
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break;
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}
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write_cmd(0x08 | displaycontrol);
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break;
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}
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}
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#endif /* GFX_USE_TDISP */
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/** @} */
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