mirror of
https://github.com/Ralim/IronOS.git
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111 lines
3.3 KiB
C++
111 lines
3.3 KiB
C++
/*
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* WS2812.cpp
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*
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* Created on: 2 May 2021
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* Author: Ralim
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*/
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#include <WS2812.h>
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#include "Pins.h"
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#include <string.h>
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uint8_t WS2812::leds_colors[WS2812_LED_CHANNEL_COUNT * WS2812_LED_COUNT];
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void WS2812::init(void) {
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memset(leds_colors, 0, sizeof(leds_colors));
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}
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void WS2812::led_update() {
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__disable_irq();
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//Bitbang it out as our cpu irq latency is too high
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for (unsigned int i = 0; i < sizeof(leds_colors); i++) {
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//Shove out MSB first
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for (int x = 0; x < 8; x++) {
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WS2812_GPIO_Port->BSRR = WS2812_Pin;
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if ((leds_colors[i] & (1 << (7 - x))) == (1 << (7 - x))) {
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__asm__ __volatile__("nop");
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__asm__ __volatile__("nop");
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__asm__ __volatile__("nop");
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__asm__ __volatile__("nop");
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__asm__ __volatile__("nop");
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__asm__ __volatile__("nop");
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__asm__ __volatile__("nop");
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__asm__ __volatile__("nop");
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__asm__ __volatile__("nop");
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__asm__ __volatile__("nop");
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__asm__ __volatile__("nop");
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__asm__ __volatile__("nop");
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__asm__ __volatile__("nop");
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__asm__ __volatile__("nop");
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__asm__ __volatile__("nop");
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__asm__ __volatile__("nop");
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__asm__ __volatile__("nop");
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__asm__ __volatile__("nop");
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__asm__ __volatile__("nop");
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__asm__ __volatile__("nop");
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__asm__ __volatile__("nop");
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__asm__ __volatile__("nop");
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__asm__ __volatile__("nop");
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__asm__ __volatile__("nop");
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__asm__ __volatile__("nop");
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__asm__ __volatile__("nop");
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__asm__ __volatile__("nop");
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__asm__ __volatile__("nop");
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__asm__ __volatile__("nop");
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__asm__ __volatile__("nop");
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} else {
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__asm__ __volatile__("nop");
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__asm__ __volatile__("nop");
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__asm__ __volatile__("nop");
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__asm__ __volatile__("nop");
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__asm__ __volatile__("nop");
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__asm__ __volatile__("nop");
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}
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WS2812_GPIO_Port->BSRR = (uint32_t) WS2812_Pin << 16u;
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__asm__ __volatile__("nop");
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__asm__ __volatile__("nop");
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__asm__ __volatile__("nop");
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__asm__ __volatile__("nop");
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__asm__ __volatile__("nop");
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__asm__ __volatile__("nop");
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__asm__ __volatile__("nop");
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__asm__ __volatile__("nop");
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__asm__ __volatile__("nop");
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__asm__ __volatile__("nop");
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__asm__ __volatile__("nop");
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__asm__ __volatile__("nop");
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__asm__ __volatile__("nop");
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__asm__ __volatile__("nop");
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__asm__ __volatile__("nop");
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__asm__ __volatile__("nop");
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__asm__ __volatile__("nop");
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__asm__ __volatile__("nop");
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__asm__ __volatile__("nop");
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__asm__ __volatile__("nop");
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__asm__ __volatile__("nop");
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__asm__ __volatile__("nop");
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__asm__ __volatile__("nop");
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__asm__ __volatile__("nop");
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__asm__ __volatile__("nop");
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__asm__ __volatile__("nop");
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__asm__ __volatile__("nop");
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}
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}
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__enable_irq();
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}
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void WS2812::led_set_color(size_t index, uint8_t r, uint8_t g, uint8_t b) {
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leds_colors[index * WS2812_LED_CHANNEL_COUNT + 0] = g;
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leds_colors[index * WS2812_LED_CHANNEL_COUNT + 1] = r;
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leds_colors[index * WS2812_LED_CHANNEL_COUNT + 2] = b;
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}
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void WS2812::led_set_color_all(uint8_t r, uint8_t g, uint8_t b) {
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for (int index = 0; index < WS2812_LED_COUNT; index++) {
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leds_colors[index * WS2812_LED_CHANNEL_COUNT + 0] = g;
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leds_colors[index * WS2812_LED_CHANNEL_COUNT + 1] = r;
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leds_colors[index * WS2812_LED_CHANNEL_COUNT + 2] = b;
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}
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}
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