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/*
* Copyright © 2012 Keith Packard <keithp@keithp.com>
*
* 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; version 2 of the License.
*
* 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.,
* 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
*/
#include <ao.h>
static const uint16_t ao_lcd_font[] = {
#include "ao_lcd_font.h"
};
/*
----- 0
|\ | /| 1 2 3 4 5
| \|/ | @ 14
-- -- 6 7
| /|\ | 8 9 10 11 12
|/ | \| @ 14
----- 13
@ 15
*/
static const uint8_t ao_bit_src[] = {
8, 7, 5, 6,
13, 12, 0, 1,
10, 14, 4, 9,
11, 15, 3, 2
};
static const uint8_t ao_bit_dst[6][4] = {
{ 0, 1, 28, 29 },
{ 2, 7, 26, 27 },
{ 8, 9, 24, 25 },
{ 10, 11, 20, 21 },
{ 12, 13, 18, 19 },
{ 14, 15, 17, 16 },
};
static void
ao_draw_glyph(uint8_t pos, uint16_t glyph) {
uint8_t col, seg, src, dst;
uint32_t ram;
for (col = 0; col < 4; col++) {
for (seg = 0; seg < 4; seg++) {
src = ao_bit_src[(col << 2) | seg];
dst = ao_bit_dst[pos][seg];
ram = stm_lcd.ram[col * 2];
ram &= ~(1 << dst);
ram |= (uint32_t) ((glyph >> src) & 1) << dst;
stm_lcd.ram[col*2] = ram;
}
}
}
#define AO_LCD_FONT_COLON (1 << 14)
#define AO_LCD_FONT_DECIMAL (1 << 15)
void
ao_lcd_font_char(uint8_t pos, char c, uint16_t flags) {
if (pos > 5)
pos = 5;
if (c < ' ' || c > 127)
c = 127;
ao_draw_glyph(pos, ao_lcd_font[c - ' '] | flags);
}
void
ao_lcd_font_string(char *s) {
uint8_t pos = 0;
uint16_t flags;
char c;
while (pos < 6 && (c = *s++)) {
flags = 0;
for (;;) {
if (*s == ':')
flags |= AO_LCD_FONT_COLON;
else if (*s == '.')
flags |= AO_LCD_FONT_DECIMAL;
else
break;
s++;
}
ao_lcd_font_char(pos++, c, flags);
}
while (pos < 6)
ao_lcd_font_char(pos++, ' ', 0);
stm_lcd.sr = (1 << STM_LCD_SR_UDR);
}
static void
ao_lcd_font_text(void)
{
char string[20];
uint8_t c = 0;
ao_cmd_white();
while (ao_cmd_lex_c != '\n' && c < sizeof (string) - 1) {
string[c++] = ao_cmd_lex_c;
ao_cmd_lex();
}
string[c++] = '\0';
ao_lcd_font_string(string);
}
const struct ao_cmds ao_lcd_font_cmds[] = {
{ ao_lcd_font_text, "t <string>\0Write <string> to LCD" },
{ 0, NULL }
};
void
ao_lcd_font_init(void)
{
ao_cmd_register(ao_lcd_font_cmds);
}
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