328 lines
8.1 KiB
C
328 lines
8.1 KiB
C
#include <avr/io.h>
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#include <avr/interrupt.h>
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#include "led.h"
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#include "softpwm_led.h"
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#include "debug.h"
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#define SOFTPWM_LED_FREQ 64
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#define SOFTPWM_LED_TIMER_TOP F_CPU / (256 * SOFTPWM_LED_FREQ)
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static uint8_t softpwm_led_state = 0;
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static uint8_t softpwm_led_ocr[LED_COUNT] = {0};
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static uint8_t softpwm_led_ocr_buff[LED_COUNT] = {0};
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void softpwm_init(void)
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{
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#ifdef SOFTPWM_LED_TIMER3
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/* Timer3 setup */
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/* CTC mode */
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TCCR3B |= (1<<WGM32);
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/* Clock selelct: clk/8 */
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TCCR3B |= (1<<CS30);
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/* Set TOP value */
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uint8_t sreg = SREG;
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cli();
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OCR3AH = (SOFTPWM_LED_TIMER_TOP >> 8) & 0xff;
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OCR3AL = SOFTPWM_LED_TIMER_TOP & 0xff;
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SREG = sreg;
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#else
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/* Timer1 setup */
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/* CTC mode */
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TCCR1B |= (1<<WGM12);
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/* Clock selelct: clk/8 */
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TCCR1B |= (1<<CS10);
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/* Set TOP value */
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uint8_t sreg = SREG;
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cli();
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OCR1AH = (SOFTPWM_LED_TIMER_TOP >> 8) & 0xff;
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OCR1AL = SOFTPWM_LED_TIMER_TOP & 0xff;
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SREG = sreg;
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#endif
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softpwm_led_init();
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}
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void softpwm_led_enable(void)
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{
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/* Enable Compare Match Interrupt */
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#ifdef SOFTPWM_LED_TIMER3
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TIMSK3 |= (1<<OCIE3A);
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//dprintf("softpwm led on: %u\n", TIMSK3 & (1<<OCIE3A));
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#else
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TIMSK1 |= (1<<OCIE1A);
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//dprintf("softpwm led on: %u\n", TIMSK1 & (1<<OCIE1A));
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#endif
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softpwm_led_state = 1;
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#ifdef LEDMAP_ENABLE
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softpwm_led_state_change(softpwm_led_state);
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#endif
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}
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void softpwm_led_disable(void)
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{
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/* Disable Compare Match Interrupt */
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#ifdef SOFTPWM_LED_TIMER3
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TIMSK3 &= ~(1<<OCIE3A);
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//dprintf("softpwm led off: %u\n", TIMSK3 & (1<<OCIE3A));
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#else
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TIMSK1 &= ~(1<<OCIE1A);
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//dprintf("softpwm led off: %u\n", TIMSK1 & (1<<OCIE1A));
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#endif
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softpwm_led_state = 0;
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for (uint8_t i = 0; i < LED_COUNT; i++) {
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softpwm_led_off(i);
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}
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#ifdef LEDMAP_ENABLE
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softpwm_led_state_change(softpwm_led_state);
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#endif
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}
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void softpwm_led_toggle(void)
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{
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if (softpwm_led_state) {
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softpwm_led_disable();
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}
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else {
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softpwm_led_enable();
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}
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}
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void softpwm_led_set(uint8_t index, uint8_t val)
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{
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softpwm_led_ocr_buff[index] = val;
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}
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void softpwm_led_set_all(uint8_t val)
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{
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for (uint8_t i = 0; i < LED_COUNT; i++) {
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softpwm_led_ocr_buff[i] = val;
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}
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}
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void softpwm_led_increase(uint8_t index, uint8_t offset)
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{
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if (softpwm_led_ocr_buff[index] > 0xFF - offset) {
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softpwm_led_ocr_buff[index] = 0xFF;
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}
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else {
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softpwm_led_ocr_buff[index] += offset;
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}
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}
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void softpwm_led_increase_all(uint8_t offset)
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{
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for (uint8_t i = 0; i < LED_COUNT; i++) {
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softpwm_led_increase(i, offset);
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}
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}
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void softpwm_led_decrease(uint8_t index, uint8_t offset)
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{
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if (softpwm_led_ocr_buff[index] < offset) {
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softpwm_led_ocr_buff[index] = 0;
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}
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else {
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softpwm_led_ocr_buff[index] -= offset;
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}
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}
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void softpwm_led_decrease_all(uint8_t offset)
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{
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for (uint8_t i = 0; i < LED_COUNT; i++) {
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softpwm_led_decrease(i, offset);
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}
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}
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inline uint8_t softpwm_led_get_state(void)
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{
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return softpwm_led_state;
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}
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#ifdef FADING_LED_ENABLE
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static led_pack_t fading_led_state = 0;
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static led_pack_t fading_led_direction = 0;
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static uint8_t fading_led_duration = 0;
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void fading_led_enable(uint8_t index)
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{
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LED_BIT_SET(fading_led_state, index);
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}
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void fading_led_enable_all(void)
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{
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for (uint8_t i = 0; i < LED_COUNT; i++) {
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LED_BIT_SET(fading_led_state, i);
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}
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}
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void fading_led_disable(uint8_t index)
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{
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LED_BIT_CLEAR(fading_led_state, index);
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}
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void fading_led_disable_all(void)
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{
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fading_led_state = 0;
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}
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void fading_led_toggle(uint8_t index)
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{
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LED_BIT_XOR(fading_led_state, index);
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}
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void fading_led_toggle_all(void)
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{
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for (uint8_t i = 0; i < LED_COUNT; i++) {
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LED_BIT_XOR(fading_led_state, i);
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}
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}
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void fading_led_set_direction(uint8_t dir)
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{
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fading_led_direction = dir;
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}
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void fading_led_set_duration(uint8_t dur)
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{
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fading_led_duration = dur;
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}
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#endif
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#ifdef BREATHING_LED_ENABLE
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/* Breathing LED brighness(PWM On period) table
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*
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* http://www.wolframalpha.com/input/?i=Table%5Bfloor%28%28exp%28sin%28x%2F256*2*pi%2B3%2F2*pi%29%29-1%2Fe%29*%28256%2F%28e-1%2Fe%29%29%29%2C+%7Bx%2C0%2C255%2C1%7D%5D
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* Table[floor((exp(sin(x/256*2*pi+3/2*pi))-1/e)*(256/(e-1/e))), {x,0,255,1}]
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* (0..255).each {|x| print ((exp(sin(x/256.0*2*PI+3.0/2*PI))-1/E)*(256/(E-1/E))).to_i, ', ' }
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*/
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static const uint8_t breathing_table[128] PROGMEM = {
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 2, 2, 2, 3, 3, 4, 4, 5, 5, 6, 6, 7, 8, 8, 9, 10, 11, 11, 12, 13, 14, 15, 16, 17, 18, 19, 21, 22, 23, 25, 26, 27, 29, 30, 32, 34, 35, 37, 39, 41, 43, 45, 47, 49, 51, 53, 56, 58, 61, 63, 66, 68, 71, 74, 77, 80, 83, 86, 89, 92, 95, 98, 102, 105, 108, 112, 116, 119, 123, 126, 130, 134, 138, 142, 145, 149, 153, 157, 161, 165, 169, 173, 176, 180, 184, 188, 192, 195, 199, 203, 206, 210, 213, 216, 219, 223, 226, 228, 231, 234, 236, 239, 241, 243, 245, 247, 248, 250, 251, 252, 253, 254, 255, 255, 255
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};
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static led_pack_t breathing_led_state = 0;
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static uint8_t breathing_led_duration = 0;
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void breathing_led_enable(uint8_t index)
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{
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LED_BIT_SET(breathing_led_state, index);
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}
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void breathing_led_enable_all(void)
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{
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for (uint8_t i = 0; i < LED_COUNT; i++) {
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LED_BIT_SET(breathing_led_state, i);
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}
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}
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void breathing_led_disable(uint8_t index)
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{
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LED_BIT_CLEAR(breathing_led_state, index);
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}
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void breathing_led_disable_all(void)
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{
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breathing_led_state = 0;
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}
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void breathing_led_toggle(uint8_t index)
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{
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LED_BIT_XOR(breathing_led_state, index);
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}
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void breathing_led_toggle_all(void)
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{
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for (uint8_t i = 0; i < LED_COUNT; i++) {
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LED_BIT_XOR(breathing_led_state, i);
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}
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}
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void breathing_led_set_duration(uint8_t dur)
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{
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breathing_led_duration = dur;
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}
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#endif
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#ifdef SOFTPWM_LED_TIMER3
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ISR(TIMER3_COMPA_vect)
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#else
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ISR(TIMER1_COMPA_vect)
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#endif
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{
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static uint8_t pwm = 0;
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pwm++;
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for (uint8_t i = 0; i < LED_COUNT; i++) {
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// LED on
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if (pwm == 0) {
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softpwm_led_on(i);
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softpwm_led_ocr[i] = softpwm_led_ocr_buff[i];
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}
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// LED off
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if (pwm == softpwm_led_ocr[i]) {
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softpwm_led_off(i);
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}
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}
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#ifdef FADING_LED_ENABLE
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static uint8_t fading_led_counter = 0;
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static uint8_t fading_led_step = 0;
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if (fading_led_state) {
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if (++fading_led_counter > SOFTPWM_LED_FREQ) {
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fading_led_counter = 0;
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if (++fading_led_step > fading_led_duration) {
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fading_led_step = 0;
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for (uint8_t i = 0; i < LED_COUNT; i++) {
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if (fading_led_state & LED_BIT(i)) {
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if (fading_led_direction) {
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softpwm_led_decrease(i, 1);
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}
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else {
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softpwm_led_increase(i, 1);
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}
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}
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}
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}
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}
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}
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#endif
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#ifdef BREATHING_LED_ENABLE
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static uint8_t breathing_led_counter = 0;
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static uint8_t breathing_led_step = 0;
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static uint8_t breathing_led_index = 0;
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static uint8_t breathing_led_direction = 0;
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if (breathing_led_state) {
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if (++breathing_led_counter > SOFTPWM_LED_FREQ) {
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breathing_led_counter = 0;
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if (++breathing_led_step > breathing_led_duration) {
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breathing_led_step = 0;
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uint8_t value = pgm_read_byte(&breathing_table[breathing_led_index]);
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for (uint8_t i = 0; i < LED_COUNT; i++) {
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if (breathing_led_state & LED_BIT(i)) {
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softpwm_led_ocr_buff[i] = value;
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}
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}
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if (breathing_led_direction) {
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if (breathing_led_index == 0) {
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breathing_led_direction = 0;
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}
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else {
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breathing_led_index--;
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}
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}
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else {
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if (breathing_led_index == 0x7F) {
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breathing_led_direction = 1;
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}
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else {
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breathing_led_index++;
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}
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}
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}
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}
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}
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#endif
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}
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