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/*
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 "tdisp_lld_board_example.h"
static void _writeData(uint8_t data) {
write_bus(data);
setpin_e(TRUE);
chThdSleepMicroseconds(1);
setpin_e(FALSE);
chThdSleepMicroseconds(5);
}
void tdisp_lld_write_cmd(uint8_t data) {
setpin_rs(FALSE);
setpin_rw(FALSE);
#if TDISP_NEED_4BIT_MODE
_writeData(data>>4);
#endif
_writeData(data);
}
void tdisp_lld_write_data(uint8_t data) {
setpin_rs(TRUE);
setpin_rw(FALSE);
#if TDISP_NEED_4BIT_MODE
_writeData(data>>4);
#endif
_writeData(data);
}
bool_t tdisp_lld_init(void) {
/* initialise MCU hardware */
init_board();
/* wait some time */
chThdSleepMilliseconds(50);
tdisp_lld_write_cmd(0x38);
chThdSleepMilliseconds(64);
tdisp_lld_write_cmd(0x0f);
chThdSleepMicroseconds(50);
tdisp_lld_write_cmd(0x01);
chThdSleepMilliseconds(5);
tdisp_lld_write_cmd(0x06);
chThdSleepMicroseconds(50);
return TRUE;
}
void tdisp_lld_set_cursor(coord_t col, coord_t row) {
uint8_t row_offsets[] = { 0x00, 0x40, 0x14, 0x54 };
if(row >= TDISP_ROWS)
row = TDISP_ROWS - 1;
tdisp_lld_write_cmd(0x80 | (col + row_offsets[row]));
}
void tdisp_lld_create_char(uint8_t address, char *charmap) {
uint8_t i;
/* make sure we don't write somewhere we're not supposed to */
address &= TDISP_MAX_CUSTOM_CHARS;
tdisp_lld_write_cmd(0x40 | (address << 3));
for(i = 0; i < 8; i++) {
tdisp_lld_write_data(charmap[i]);
}
}
void tdisp_lld_clear(void) {
tdisp_lld_write_cmd(0x01);
}
void tdisp_lld_home(void) {
tdisp_lld_write_cmd(0x02);
}
void tdisp_lld_control(uint16_t what, void *value) {
(void)what;
(void)value;
/*
switch(attributes) {
case TDISP_ON:
_displaycontrol |= 0x04;
tdisp_lld_write_cmd(0x08 | _displaycontrol);
break;
case TDISP_OFF:
_displaycontrol &=~ 0x04;
tdisp_lld_write_cmd(0x08 | _displaycontrol);
break;
case TDISP_CURSOR_ON:
_displaycontrol |= 0x02;
tdisp_lld_write_cmd(0x08 | _displaycontrol);
break;
case TDISP_CURSOR_OFF:
_displaycontrol &=~ 0x02;
tdisp_lld_write_cmd(0x08 | _displaycontrol);
break;
case TDISP_CURSOR_BLINK_ON:
_displaycontrol |= 0x00;
tdisp_lld_write_cmd(0x08 | _displaycontrol);
break;
case TDISP_CURSOR_BLINK_OFF:
_displaycontrol &=~ 0x00;
tdisp_lld_write_cmd(0x08 | _displaycontrol);
break;
}
*/
}
#endif /* GFX_USE_TDISP */
/** @} */
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