mirror of
https://github.com/eddyem/STM8_samples.git
synced 2025-12-06 18:55:15 +03:00
101 lines
3.1 KiB
C
101 lines
3.1 KiB
C
/*
|
|
* CD74HC154_LEDs.c
|
|
*
|
|
* Copyright 2014 Edward V. Emelianoff <eddy@sao.ru>
|
|
*
|
|
* 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 "CD74HC154_LEDs.h"
|
|
|
|
|
|
// bits array: contains numbers of LED's bits to shine (0..6) with zero 4th bit or 0x1x for OFF
|
|
U8 LED_bits[LEDS_AMOUNT];
|
|
U8 effect_cntr = 0;
|
|
char effect_increment = 1; // adds to effect_cntr (1 or -1)
|
|
|
|
U8 *current_effect = NULL;
|
|
|
|
U8 LED_effect = 0;
|
|
|
|
// arrays of LED effects, array should be ended with 0
|
|
#define EFFECTS_NUM 4
|
|
U8 growing_strip[] = {64, 1, 3, 7, 15, 31, 63, 0}; // *; **; ***; ****; ...
|
|
U8 collider[] = {33, 18, 12, 12, 18, 33, 0}; // *....*; .*..*.; ..**..; ...
|
|
U8 harvest[] = {32, 16, 8, 4, 2, 1, // *.....; .*....; ..*...; ...*..; ....*.; .....*;
|
|
33, 17, 9, 5, 3, // *....*; .*...*; ..*..*; ...*.*; ....**;
|
|
35, 19, 11, 7, // *...**; .*..**; ..*.**; ...***;
|
|
39, 23, 15, // *..***; .*.***; ..****;
|
|
47, 31, // *.****; .*****;
|
|
63, 0};// ******
|
|
U8 reflections[] = {1,2,4,8,16,32,0}; // <-*->
|
|
U8 *EFFECTS[EFFECTS_NUM] = {growing_strip, collider,
|
|
harvest, reflections}; // array of avaialable effects
|
|
|
|
/**
|
|
* Initialize bit array for LEDs blinking
|
|
* @param mask - bitmap mask for LEDs: 1 - LED is ON, 0 - LED is OFF, mask &= 0x3f (6 LEDs)!
|
|
*/
|
|
void set_LEDs(U16 mask){
|
|
U8 i;
|
|
for(i = 0; i < LEDS_AMOUNT; i++, mask >>= 1)
|
|
LED_bits[i] = (mask & 1) ? i : 0x10; // to turn all LEDs off we set !E to high level
|
|
}
|
|
|
|
U8 current_LED = 0;
|
|
|
|
/**
|
|
* Send next binary value to demultiplexer
|
|
* we have cycle of LEDS_AMOUNT values, blink them consecutively (don't forget
|
|
* to reduce LEDs resistor according to LEDS_AMOUNT)
|
|
*/
|
|
void blink_next_LED(){
|
|
PORT(LEDS_PORT, ODR) = LED_bits[current_LED++];
|
|
if(current_LED == LEDS_AMOUNT)
|
|
current_LED = 0;
|
|
}
|
|
|
|
// turn off all LEDs
|
|
void reset_LEDs(){
|
|
U8 i;
|
|
for(i = 0; i < LEDS_AMOUNT; i++)
|
|
LED_bits[i] = 0x10;
|
|
LED_effect = 0;
|
|
}
|
|
|
|
/**
|
|
* Increment effect counter & set new LED number
|
|
*/
|
|
void next_LED_in_effects(){
|
|
if(!current_effect) return;
|
|
set_LEDs(current_effect[effect_cntr]);
|
|
if(effect_cntr == 0 && effect_increment == -1){ // left border - go to the right
|
|
effect_increment = 1;
|
|
}
|
|
effect_cntr += effect_increment;
|
|
if(current_effect[effect_cntr] == 0){ // right border - go to the left
|
|
effect_increment = -1;
|
|
effect_cntr -= 2; // and go to left from previous element
|
|
}
|
|
}
|
|
|
|
void set_effect(U8 n){
|
|
if(n < EFFECTS_NUM){
|
|
current_effect = EFFECTS[n];
|
|
LED_effect = 1;
|
|
}
|
|
}
|