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/**
*
* @file
* @brief Hello World for TM1638 based displays
* @author Martin Oldfield <ex-tm1638@mjo.tc>
* @version 0.1
*
* @section DESCRIPTION
*
* A simple "Hello World" example program for the TM1638.
*
* @section HARDWARE
*
* The code hard wires pin connections:
*
* * data: GPIO 17
* * clock: GPIO 21
* * strobe: GPIO 22
*
* @section LICENSE
*
* 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 at
* http://www.gnu.org/copyleft/gpl.html
*
*/
/** @cond NEVER */
#include <stdio.h>
#include <stdlib.h>
#include <stdint.h>
#include <stdbool.h>
#include <bcm2835.h>
#include <tm1638.h>
static void knight_rider(tm1638_p t, int n);
static void flashy(tm1638_p t);
int main(int argc, char *argv[])
{
tm1638_p t;
if (!bcm2835_init())
{
printf("Unable to initialize BCM library\n");
return -1;
}
t = tm1638_alloc(17, 21, 22);
if (!t)
{
printf("Unable to allocate TM1638\n");
return -2;
}
tm1638_set_7seg_text(t, "Hello !", 0x00);
delay(5000);
tm1638_send_cls(t);
knight_rider(t,2);
tm1638_send_cls(t);
flashy(t);
tm1638_send_cls(t);
knight_rider(t,2);
tm1638_send_cls(t);
tm1638_set_7seg_text(t, "Goodbye!", 0x00);
tm1638_free(&t);
return 0;
}
static void knight_rider(tm1638_p t, int n)
{
for(int i = 0; i < n; i++)
{
for(int j = 0; j < 8; j++)
{
uint8_t m = 128 >> j;
tm1638_set_8leds(t, m, 0);
tm1638_set_7seg_text(t, "", m);
delay(25);
}
for(int j = 0; j < 8; j++)
{
uint8_t m = 1 << j;
tm1638_set_8leds(t, m, 0);
tm1638_set_7seg_text(t, "", m);
delay(25);
}
}
}
static void flashy(tm1638_p t)
{
uint8_t green = 0;
for(int i = 0; i < 8; i++)
{
uint8_t mask = (128 >> i);
tm1638_set_8leds(t, mask, green);
for(int j = 0; j < 8; j++)
{
tm1638_set_7seg_raw(t, i, (1 << j));
delay(50);
}
green |= mask;
tm1638_set_8leds(t, 0, green);
}
}
/** @endcond */
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