154 lines
3.3 KiB
C
154 lines
3.3 KiB
C
/*
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ChibiOS/GFX - Copyright (C) 2012
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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 "tdisp_lld_board_example.h"
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static void _writeData(uint8_t data) {
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write_bus(data);
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setpin_e(TRUE);
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chThdSleepMicroseconds(1);
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setpin_e(FALSE);
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chThdSleepMicroseconds(5);
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}
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void tdisp_lld_write_cmd(uint8_t data) {
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setpin_rs(FALSE);
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setpin_rw(FALSE);
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#if TDISP_NEED_4BIT_MODE
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_writeData(data>>4);
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#endif
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_writeData(data);
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}
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void tdisp_lld_write_data(uint8_t data) {
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setpin_rs(TRUE);
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setpin_rw(FALSE);
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#if TDISP_NEED_4BIT_MODE
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_writeData(data>>4);
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#endif
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_writeData(data);
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}
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bool_t tdisp_lld_init(void) {
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/* initialise MCU hardware */
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init_board();
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/* wait some time */
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chThdSleepMilliseconds(50);
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tdisp_lld_write_cmd(0x38);
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chThdSleepMilliseconds(64);
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tdisp_lld_write_cmd(0x0f);
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chThdSleepMicroseconds(50);
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tdisp_lld_write_cmd(0x01);
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chThdSleepMilliseconds(5);
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tdisp_lld_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_set_cursor(coord_t col, coord_t row) {
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uint8_t row_offsets[] = { 0x00, 0x40, 0x14, 0x54 };
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if(row >= TDISP_ROWS)
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row = TDISP_ROWS - 1;
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tdisp_lld_write_cmd(0x80 | (col + row_offsets[row]));
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}
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void tdisp_lld_create_char(uint8_t address, char *charmap) {
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uint8_t i;
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/* make sure we don't write somewhere we're not supposed to */
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address &= TDISP_MAX_CUSTOM_CHARS;
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tdisp_lld_write_cmd(0x40 | (address << 3));
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for(i = 0; i < 8; i++) {
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tdisp_lld_write_data(charmap[i]);
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}
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}
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void tdisp_lld_clear(void) {
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tdisp_lld_write_cmd(0x01);
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}
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void tdisp_lld_home(void) {
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tdisp_lld_write_cmd(0x02);
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}
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void tdisp_lld_control(uint16_t what, void *value) {
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(void)what;
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(void)value;
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/*
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switch(attributes) {
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case TDISP_ON:
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_displaycontrol |= 0x04;
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tdisp_lld_write_cmd(0x08 | _displaycontrol);
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break;
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case TDISP_OFF:
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_displaycontrol &=~ 0x04;
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tdisp_lld_write_cmd(0x08 | _displaycontrol);
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break;
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case TDISP_CURSOR_ON:
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_displaycontrol |= 0x02;
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tdisp_lld_write_cmd(0x08 | _displaycontrol);
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break;
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case TDISP_CURSOR_OFF:
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_displaycontrol &=~ 0x02;
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tdisp_lld_write_cmd(0x08 | _displaycontrol);
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break;
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case TDISP_CURSOR_BLINK_ON:
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_displaycontrol |= 0x00;
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tdisp_lld_write_cmd(0x08 | _displaycontrol);
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break;
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case TDISP_CURSOR_BLINK_OFF:
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_displaycontrol &=~ 0x00;
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tdisp_lld_write_cmd(0x08 | _displaycontrol);
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break;
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}
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*/
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}
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#endif /* GFX_USE_TDISP */
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/** @} */
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