diff options
author | Joel Challis <git@zvecr.com> | 2021-11-19 18:41:02 +0000 |
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committer | GitHub <noreply@github.com> | 2021-11-19 10:41:02 -0800 |
commit | 2728603fe6d73e805a539d337fd01051c46ca806 (patch) | |
tree | 5c83ffc7efa112da870bd5d8502a9d91d4792f35 /tmk_core/common/avr/sleep_led.c | |
parent | 43b9e23bae12916d5161f03700c9bfe46737324b (diff) |
Move tmk_core/common/<plat> (#13918)
Diffstat (limited to 'tmk_core/common/avr/sleep_led.c')
-rw-r--r-- | tmk_core/common/avr/sleep_led.c | 124 |
1 files changed, 0 insertions, 124 deletions
diff --git a/tmk_core/common/avr/sleep_led.c b/tmk_core/common/avr/sleep_led.c deleted file mode 100644 index 9a3b52abe5..0000000000 --- a/tmk_core/common/avr/sleep_led.c +++ /dev/null @@ -1,124 +0,0 @@ -#include <stdint.h> -#include <avr/io.h> -#include <avr/interrupt.h> -#include <avr/pgmspace.h> -#include "led.h" -#include "sleep_led.h" - -#ifndef SLEEP_LED_TIMER -# define SLEEP_LED_TIMER 1 -#endif - -#if SLEEP_LED_TIMER == 1 -# define TCCRxB TCCR1B -# define TIMERx_COMPA_vect TIMER1_COMPA_vect -# if defined(__AVR_ATmega32A__) // This MCU has only one TIMSK register -# define TIMSKx TIMSK -# else -# define TIMSKx TIMSK1 -# endif -# define OCIExA OCIE1A -# define OCRxx OCR1A -#elif SLEEP_LED_TIMER == 3 -# define TCCRxB TCCR3B -# define TIMERx_COMPA_vect TIMER3_COMPA_vect -# define TIMSKx TIMSK3 -# define OCIExA OCIE3A -# define OCRxx OCR3A -#else -error("Invalid SLEEP_LED_TIMER config") -#endif - -/* Software PWM - * ______ ______ __ - * | ON |___OFF___| ON |___OFF___| .... - * |<-------------->|<-------------->|<- .... - * PWM period PWM period - * - * 256 interrupts/period[resolution] - * 64 periods/second[frequency] - * 256*64 interrupts/second - * F_CPU/(256*64) clocks/interrupt - */ -#define SLEEP_LED_TIMER_TOP F_CPU / (256 * 64) - -/** \brief Sleep LED initialization - * - * FIXME: needs doc - */ -void sleep_led_init(void) { - /* Timer1 setup */ - /* CTC mode */ - TCCRxB |= _BV(WGM12); - /* Clock selelct: clk/1 */ - TCCRxB |= _BV(CS10); - /* Set TOP value */ - uint8_t sreg = SREG; - cli(); - OCRxx = SLEEP_LED_TIMER_TOP; - SREG = sreg; -} - -/** \brief Sleep LED enable - * - * FIXME: needs doc - */ -void sleep_led_enable(void) { - /* Enable Compare Match Interrupt */ - TIMSKx |= _BV(OCIExA); -} - -/** \brief Sleep LED disable - * - * FIXME: needs doc - */ -void sleep_led_disable(void) { - /* Disable Compare Match Interrupt */ - TIMSKx &= ~_BV(OCIExA); -} - -/** \brief Sleep LED toggle - * - * FIXME: needs doc - */ -void sleep_led_toggle(void) { - /* Disable Compare Match Interrupt */ - TIMSKx ^= _BV(OCIExA); -} - -/** \brief Breathing Sleep LED brighness(PWM On period) table - * - * (64[steps] * 4[duration]) / 64[PWM periods/s] = 4 second breath cycle - * - * https://www.wolframalpha.com/input/?i=sin%28x%2F64*pi%29**8+*+255%2C+x%3D0+to+63 - * (0..63).each {|x| p ((sin(x/64.0*PI)**8)*255).to_i } - */ -static const uint8_t breathing_table[64] PROGMEM = {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 2, 4, 6, 10, 15, 23, 32, 44, 58, 74, 93, 113, 135, 157, 179, 199, 218, 233, 245, 252, 255, 252, 245, 233, 218, 199, 179, 157, 135, 113, 93, 74, 58, 44, 32, 23, 15, 10, 6, 4, 2, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}; - -ISR(TIMERx_COMPA_vect) { - /* Software PWM - * timer:1111 1111 1111 1111 - * \_____/\/ \_______/____ count(0-255) - * \ \______________ duration of step(4) - * \__________________ index of step table(0-63) - */ - static union { - uint16_t row; - struct { - uint8_t count : 8; - uint8_t duration : 2; - uint8_t index : 6; - } pwm; - } timer = {.row = 0}; - - timer.row++; - - // LED on - if (timer.pwm.count == 0) { - led_set(1 << USB_LED_CAPS_LOCK); - } - // LED off - if (timer.pwm.count == pgm_read_byte(&breathing_table[timer.pwm.index])) { - led_set(0); - } -} |