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https://github.com/eddyem/IR-controller.git
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98 lines
2.3 KiB
C
98 lines
2.3 KiB
C
/*
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* leds.c - manage on-board LED in software PWM mode
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
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* MA 02110-1301, USA.
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*/
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#include "leds.h"
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// global variables for software PWM emilation
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uint8_t led_state = LEDSTATE_OFF;
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uint16_t led_blink_on = 0;
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uint16_t led_blink_off = 0;
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uint16_t led_ticks_on = 0;
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uint16_t led_ticks_off = 0;
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uint8_t duty_cycle = 4;
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uint8_t LED_GetState(){
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return led_state;
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}
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void LED_Duty(uint8_t duty){
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duty_cycle = duty;
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if(led_state == LEDSTATE_BLINK)
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LED_OnBlink();
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}
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void LED_DutyPlus(){
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if(duty_cycle < 7) duty_cycle++;
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if(led_state == LEDSTATE_BLINK)
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LED_OnBlink();
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}
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void LED_DutyMinus(){
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if(duty_cycle > 0) duty_cycle--;
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if(led_state == LEDSTATE_BLINK)
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LED_OnBlink();
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}
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uint8_t LED_GetBlinkState(uint16_t *blink_on, uint16_t *blink_off){
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*blink_on = led_blink_on;
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*blink_off = led_blink_off;
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return led_state;
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}
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void LED_On(){
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led_state = LEDSTATE_ON;
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led_blink_on = 0;
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led_blink_off = 0;
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GPIO_ResetBits(GPIOC, GPIO_Pin_12);
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}
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void LED_Off(){
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led_state = LEDSTATE_OFF;
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GPIO_SetBits(GPIOC, GPIO_Pin_12);
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}
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void LED_OnBlink(){
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led_blink_off = 1 << duty_cycle;
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led_blink_on = 0xff - led_blink_off;
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led_ticks_on = 0;
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led_ticks_off = 0;
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if(led_blink_off == 0){
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LED_On();
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return;
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}
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if(led_blink_on == 0)
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{
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LED_Off();
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return;
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}
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led_state = LEDSTATE_BLINK;
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}
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void LED_SysTick_Handler(){
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if(led_state != LEDSTATE_BLINK) return;
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if(led_ticks_on == 0)
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GPIO_SetBits(GPIOC, GPIO_Pin_12);
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if(led_ticks_on <= led_blink_on) {
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led_ticks_on++;
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return;
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}
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if (led_ticks_off == 0){
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GPIO_ResetBits(GPIOC, GPIO_Pin_12);
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}
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if(led_ticks_off <= led_blink_off){
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led_ticks_off++;
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return;
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}
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led_ticks_on = 0;
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led_ticks_off = 0;
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}
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