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/*
* Xytronic LF-1600
* Display routines
*
* Copyright (c) 2015-2016 Michael Buesch <m@bues.ch>
*
* 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; either version 2 of the License, or
* (at your option) any later version.
*
* 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.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include "display.h"
#include "sseg.h"
#include "timer.h"
#include "bitmap.h"
#include "ring.h"
#include <string.h>
#define DISPLAY_MUX_PERIOD_MS 1
static const struct sseg_segment_iomap __flash big_digit = {
.segment_ddr = SFR_ADDR(DDRD),
.segment_port = SFR_ADDR(PORTD),
.segment_masks = {
[SSEG_A] = 1u << PD7,
[SSEG_B] = 1u << PD0,
[SSEG_C] = 1u << PD2,
[SSEG_D] = 1u << PD4,
[SSEG_E] = 1u << PD5,
[SSEG_F] = 1u << PD6,
[SSEG_G] = 1u << PD1,
[SSEG_DP] = 1u << PD3,
},
.segment_polarity = 0,
};
static const struct sseg_segment_iomap __flash small_digit = {
.segment_ddr = SFR_ADDR(DDRD),
.segment_port = SFR_ADDR(PORTD),
.segment_masks = {
[SSEG_A] = 1u << PD2,
[SSEG_B] = 1u << PD3,
[SSEG_C] = 1u << PD0,
[SSEG_D] = 1u << PD1,
[SSEG_E] = 1u << PD6,
[SSEG_F] = 1u << PD4,
[SSEG_G] = 1u << PD7,
[SSEG_DP] = 1u << PD5,
},
.segment_polarity = 0,
};
static const struct sseg_iomap __flash digit_iomaps[] = {
{
.segment = &big_digit,
.mux_ddr = SFR_ADDR(DDRC),
.mux_port = SFR_ADDR(PORTC),
.mux_mask = 1u << PC3,
.mux_polarity = 1,
}, {
.segment = &big_digit,
.mux_ddr = SFR_ADDR(DDRC),
.mux_port = SFR_ADDR(PORTC),
.mux_mask = 1u << PC4,
.mux_polarity = 1,
}, {
.segment = &big_digit,
.mux_ddr = SFR_ADDR(DDRC),
.mux_port = SFR_ADDR(PORTC),
.mux_mask = 1u << PC5,
.mux_polarity = 1,
}, {
.segment = &small_digit,
.mux_ddr = SFR_ADDR(DDRB),
.mux_port = SFR_ADDR(PORTB),
.mux_mask = 1u << PB7,
.mux_polarity = 1,
},
};
#define DISPLAY_NR_DIGITS ARRAY_SIZE(digit_iomaps)
struct display_digit {
struct sseg_digit_data sseg;
bool dp_force_enable;
bool dp_on;
};
struct display_context {
bool enabled;
struct display_digit digit_data[DISPLAY_NR_DIGITS];
uint8_t digit_mux_count;
struct timer mux_timer;
};
static struct display_context display;
void display_force_dp(int8_t dp, bool force_en, bool dp_on)
{
display.digit_data[dp].dp_force_enable = force_en;
display.digit_data[dp].dp_on = dp_on;
}
void display_show(const char *digits)
{
struct display_digit *digit_data;
char c;
digit_data = &display.digit_data[0];
do {
c = digits[0];
if (c == '\0') {
c = ' ';
} else {
if (digits[1] == '.') {
c = (char)(c | SSEG_DIGIT_DP);
digits++;
}
if (digit_data->dp_force_enable) {
if (digit_data->dp_on)
c = (char)(c | SSEG_DIGIT_DP);
else
c = (char)(c & (char)~SSEG_DIGIT_DP);
}
digits++;
}
sseg_digit_set(&digit_data->sseg, c);
digit_data++;
} while (digit_data < &display.digit_data[DISPLAY_NR_DIGITS]);
}
void display_work(void)
{
uint8_t cur_mux, next_mux;
if (!display.enabled)
return;
if (!timer_expired(&display.mux_timer))
return;
timer_add(&display.mux_timer, DISPLAY_MUX_PERIOD_MS);
cur_mux = display.digit_mux_count;
next_mux = ring_next(cur_mux, DISPLAY_NR_DIGITS - 1u);
display.digit_mux_count = next_mux;
sseg_multiplex(&display.digit_data[cur_mux].sseg,
&display.digit_data[next_mux].sseg);
}
void display_enable(bool enable)
{
uint8_t i;
struct sseg_digit_data *ddata;
if (enable == display.enabled)
return;
display.enabled = enable;
if (enable) {
for (i = 0; i < DISPLAY_NR_DIGITS; i++) {
ddata = &display.digit_data[i].sseg;
ddata->iomap = &digit_iomaps[i];
sseg_init(ddata);
}
timer_set_now(&display.mux_timer);
} else {
for (i = 0; i < DISPLAY_NR_DIGITS; i++) {
ddata = &display.digit_data[i].sseg;
sseg_exit(ddata);
}
}
}
void display_init(void)
{
display_enable(true);
}
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