{"id":70030,"date":"2026-02-01T13:49:37","date_gmt":"2026-02-01T05:49:37","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/70030.html"},"modified":"2026-02-01T13:49:37","modified_gmt":"2026-02-01T05:49:37","slug":"spi-%e9%a9%b1%e5%8a%a8-ws2812-gd32%e6%96%b9%e6%a1%88","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/70030.html","title":{"rendered":"SPI \u9a71\u52a8 WS2812 GD32\u65b9\u6848"},"content":{"rendered":"

\u9047\u5230\u7684\u5927\u5751：
\n1.spi\u4e00\u5b9a\u8981\u9009：\u00a0\u8df3\u53d8\u6cbf\u9009\u7b2c\u4e8c\u4e2a（2Edge）\u6a21\u5f0f<\/span>\"\"<\/p>\n

\u56e0\u4e3a\u8df3\u53d8\u6cbf\u4e3a 1 \u7684\u8bdd，MOSI \u7684\u7a7a\u95f2\u7535\u5e73\u4e3a\u9ad8\u7535\u5e73，\u4e3a 2 \u7684\u8bdd\u5219\u4f1a\u5ef6\u7eed\u4e0a\u6b21\u53d1\u9001\u7684\u6700\u540e\u7535\u5e73，\u6211\u4eec\u53d1\u9001\u6570\u636e\u7684\u672b\u5c3e\u90fd\u662f\u4f4e\u7535\u5e73，\u8fd9\u6837 WS2812 \u4e0d\u4f1a\u8bef\u5224<\/p>\n<\/p>\n

2.\u5176\u5b9e\u4f60\u7684\u9a71\u52a8\u6ce2\u5f62\u6839\u672c\u4e0d\u9700\u8981\u90a3\u4e48\u4e25\u683c，\u624b\u518c\u89c4\u5b9a\u7684\u65f6\u95f4\u4ee5\u5916\u8fd8\u6709\u4f59\u91cf，\u6211\u5c31\u662f\u672c\u6765\u8981\u6c42560ns-1us\u6211\u5c31\u5230\u00b71us\u4f46\u662f\u989c\u8272\u4e0d\u5bf9\u4e22\u6570\u636e\u4e86，\u6700\u540e\u8bc1\u5b9e\u53ea\u662f\u56e0\u4e3a1.\u4e2d\u8df3\u53d8\u6cbf\u9009\u7b2c\u4e8c\u4e2a（2Edge）\u6a21\u5f0f\u6ca1\u9009\u5bf9\u5bfc\u81f4\u521a\u5f00\u59cb\u6ce2\u5f62\u9519\u8bef，\u8fd9\u4e5f\u662f\u6700\u91cd\u8981\u7684，\u4f60\u521a\u5f00\u59cb\u7ed9\u9ad8\u7535\u5e73\u5176\u5b9e\u662f\u771f\u7684\u4f1a\u9519<\/span><\/p>\n

\u4ee5\u540e\u9047\u5230\u4efb\u4f55\u9a71\u52a8\u53ea\u8981\u4f60\u7684\u65f6\u5e8f\u5dee\u5979\u624b\u518c\u7684\u6781\u9650\u51e0\u7eb3\u79d2\u4e00\u70b9\u90fd\u662f\u6ca1\u4e8b\u7684<\/span><\/p>\n

3.\u624b\u518c\u6709\u4e9b\u4eba\u7684\u662f\u9519\u7684\u6211\u53bb\u5609\u7acb\u521b\u62ff\u7684\u4e5f\u662f\u9519\u7684\u4e0b\u6b21\u5199\u9a71\u52a8\u5f97\u591a\u53c2\u8003\u4ef7\u770b\u51e0\u4efd\u6210\u529f\u7ecf\u5386<\/p>\n

\"\"<\/p>\n

spi\u5c31\u884c\u4e0d\u7528dma\u4e5f\u53ef\u4ee5\u56e0\u4e3a\u6700\u5feb\u5c31\u90a3\u6837，\u4f60\u4f7f\u7528dma\u53ef\u4ee5\u8282\u7ea6cpu\u8d44\u6e90\u4f46\u5bf9\u6211\u6765\u8bf4\u6ca1\u5565\u7528<\/p>\n

gpio+nop（）\u4e5f\u80fd\u9a71\u52a8\u5c31\u662f\u53ef\u80fd\u4f1a\u6709\u51e0\u7387\u663e\u793a\u9519\u8bef<\/p>\n<\/p>\n

\u5177\u4f53\u914d\u7f6e\u4e3a：<\/p>\n

\u5185\u90e8\u65f6\u949f\u500d\u9891\u523072m\u4e3b\u9891\u00a0 spi 8\u5206\u9891\u00a0\"\"<\/p>\n

\u4ea7\u751f\u6ce2\u5f62：\"\"<\/p>\n<\/p>\n

\u53c2\u8003\u4ee3\u7801：<\/p>\n

\u00a0<\/p>\n

\/*!
\n \\\\file main.c
\n \\\\brief USART DMA receive by IDLE interrupt + SPI\u9a71\u52a8WS2812B<\/p>\n

\\\\version 2025-01-01, V3.7.0, firmware update for GD32F1x0(x=3,5)
\n*\/<\/p>\n

\/*
\n Copyright (c) 2025, GigaDevice Semiconductor Inc.<\/p>\n

Redistribution and use in source and binary forms, with or without modification,
\nare permitted provided that the following conditions are met:<\/p>\n

1. Redistributions of source code must retain the above copyright notice, this
\n list of conditions and the following disclaimer.
\n 2. Redistributions in binary form must reproduce the above copyright notice,
\n this list of conditions and the following disclaimer in the documentation
\n and\/or other materials provided with the distribution.
\n 3. Neither the name of the copyright holder nor the names of its contributors
\n may be used to endorse or promote products derived from this software without
\n specific prior written permission.<\/p>\n

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
\nAND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
\nWARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
\nIN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
\nINDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
\nNOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
\nPROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
\nWHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
\nARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
\nOF SUCH DAMAGE.
\n*\/<\/p>\n

#include "gd32f1x0.h"
\n#include <stdio.h>
\n#include "gd32f1x0r_eval.h"
\n#include "systick.h"<\/p>\n

\/\/ ============================
\n\/\/ \u7c7b\u578b\u5b9a\u4e49
\n\/\/ ============================
\ntypedef struct {
\n uint8_t green;
\n uint8_t red;
\n uint8_t blue;
\n} WS2812B_Color;<\/p>\n

\/\/ ============================
\n\/\/ \u7cfb\u7edf\u65f6\u949f\u914d\u7f6e (72MHz)
\n\/\/ ============================
\n#define SYSTEM_CLOCK 72000000 \/\/ \u7cfb\u7edf\u4e3b\u989172MHz<\/p>\n

\/\/ ============================
\n\/\/ WS2812B SPI\u9a71\u52a8\u914d\u7f6e (72MHz\u7cfb\u7edf\u65f6\u949f)
\n\/\/ ============================
\n#define SPI_CLOCK_DIV SPI_PSC_8 \/\/ \u9884\u5206\u98918，\u5f97\u52309MHz SPI\u65f6\u949f
\n#define SPI_CLOCK_FREQ 9000000 \/\/ 9MHz SPI\u65f6\u949f
\n#define SPI_BIT_TIME_NS 111 \/\/ \u6bcf\u4e2aSPI\u4f4d\u7ea6111ns<\/p>\n

\/\/ WS2812B SPI\u7f16\u7801（\u57fa\u4e8e9MHz SPI\u65f6\u949f）
\n#define WS2812B_SPI_0_CODE 0xC0 \/\/ 0\u7801: 11000000 – \u9ad8\u7535\u5e73222ns(2bits)，\u4f4e\u7535\u5e73667ns(6bits)
\n#define WS2812B_SPI_1_CODE 0xF8 \/\/ 1\u7801: 11111000 – \u9ad8\u7535\u5e73556ns(5bits)，\u4f4e\u7535\u5e73333ns(3bits)<\/p>\n

#define WS2812B_SPI_RESET_US 300 \/\/ \u590d\u4f4d\u65f6\u95f4300us
\n#define WS2812B_SPI_RESET_BYTES 270<\/p>\n

\/\/ ============================
\n\/\/ LED\u914d\u7f6e
\n\/\/ ============================
\n#define MAX_LED_COUNT 100 \/\/ \u6700\u5927LED\u6570\u91cf
\n#define DEFAULT_LED_COUNT 40 \/\/ \u9ed8\u8ba4LED\u6570\u91cf<\/p>\n

\/\/ ============================
\n\/\/ \u6a21\u5f0f\u5b9a\u4e49（\u6839\u636e\u4f60\u7684\u4e0a\u4f4d\u673a\u8c03\u6574）
\n\/\/ ============================
\n#define MODE_STATIC_COLOR 0 \/\/ \u9759\u6001\u989c\u8272\u6a21\u5f0f（\u4e0a\u4f4d\u673a\u5f53\u524d\u4f7f\u7528）
\n#define MODE_RAINBOW_BREATH 1 \/\/ \u5f69\u8679\u547c\u5438\u706f\u6a21\u5f0f
\n#define MODE_RAINBOW_FLOW 2 \/\/ \u5f69\u8679\u6d41\u6c34\u706f\u6a21\u5f0f
\n#define MODE_RAINBOW_WAVE 3 \/\/ \u5f69\u8679\u6ce2\u6d6a\u6a21\u5f0f
\n#define MODE_COLOR_WIPE 4 \/\/ \u989c\u8272\u626b\u9664\u6a21\u5f0f
\n#define MODE_THEATER_CHASE 5 \/\/ \u5267\u573a\u8ffd\u9010\u6a21\u5f0f
\n#define MODE_SINGLE_COLOR_BREATH 6 \/\/ \u5355\u8272\u547c\u5438\u706f\u6a21\u5f0f<\/p>\n

\/\/ ============================
\n\/\/ \u6307\u4ee4\u5b57\u8282\u7d22\u5f15\u5b9a\u4e49（\u9002\u914d\u4f60\u768422\u5b57\u8282\u6307\u4ee4）
\n\/\/ ============================
\n#define CMD_HEADER_0 0 \/\/ DD
\n#define CMD_HEADER_1 1 \/\/ 55
\n#define CMD_HEADER_2 2 \/\/ EE
\n#define CMD_MODE_SELECT 3 \/\/ \u6a21\u5f0f\u9009\u62e9（\u4f60\u7684\u4e0a\u4f4d\u673a\u56fa\u5b9a\u4e3a00）
\n#define CMD_EFFECT_SPEED 4 \/\/ \u6548\u679c\u901f\u5ea6（\u4f60\u7684\u4e0a\u4f4d\u673a\u56fa\u5b9a\u4e3a00）
\n#define CMD_EFFECT_BRIGHTNESS 5 \/\/ \u6548\u679c\u4eae\u5ea6（\u4f60\u7684\u4e0a\u4f4d\u673a\u56fa\u5b9a\u4e3a00）
\n#define CMD_EFFECT_PARAM1 6 \/\/ \u53c2\u65701（\u4f60\u7684\u4e0a\u4f4d\u673a\u56fa\u5b9a\u4e3a01）
\n#define CMD_EFFECT_PARAM2 7 \/\/ \u53c2\u65702（\u4f60\u7684\u4e0a\u4f4d\u673a\u56fa\u5b9a\u4e3a00）
\n#define CMD_EFFECT_PARAM3 8 \/\/ \u53c2\u65703（\u4f60\u7684\u4e0a\u4f4d\u673a\u56fa\u5b9a\u4e3a99）
\n#define CMD_EFFECT_PARAM4 9 \/\/ \u53c2\u65704（\u4f60\u7684\u4e0a\u4f4d\u673a\u56fa\u5b9a\u4e3a01）
\n#define CMD_EFFECT_PARAM5 10 \/\/ \u53c2\u65705（\u4f60\u7684\u4e0a\u4f4d\u673a\u56fa\u5b9a\u4e3a00）
\n#define CMD_EFFECT_PARAM6 11 \/\/ \u53c2\u65706（\u4f60\u7684\u4e0a\u4f4d\u673a\u56fa\u5b9a\u4e3a00）
\n#define CMD_EFFECT_PARAM7 12 \/\/ \u53c2\u65707（\u4f60\u7684\u4e0a\u4f4d\u673a\u56fa\u5b9a\u4e3a00）
\n#define CMD_EFFECT_PARAM8 13 \/\/ \u53c2\u65708（\u4f60\u7684\u4e0a\u4f4d\u673a\u56fa\u5b9a\u4e3a03）
\n#define CMD_EFFECT_PARAM9 14 \/\/ \u53c2\u65709（\u4f60\u7684\u4e0a\u4f4d\u673a\u56fa\u5b9a\u4e3a00）
\n#define CMD_LED_COUNT 15 \/\/ LED\u6570\u91cf（\u4f60\u7684\u6307\u4ee4\u7d22\u5f1515）
\n#define CMD_COLOR_R 16 \/\/ \u989c\u8272R（\u4f60\u7684\u6307\u4ee4\u7d22\u5f1516）
\n#define CMD_COLOR_G 17 \/\/ \u989c\u8272G（\u4f60\u7684\u6307\u4ee4\u7d22\u5f1517）
\n#define CMD_COLOR_B 18 \/\/ \u989c\u8272B（\u4f60\u7684\u6307\u4ee4\u7d22\u5f1518）
\n#define CMD_CHECKSUM_1 19 \/\/ \u6821\u9a8c\u78011 AA
\n#define CMD_CHECKSUM_2 20 \/\/ \u6821\u9a8c\u78012 BB<\/p>\n

#define CMD_TOTAL_LENGTH 21 \/\/ \u603b\u6307\u4ee4\u957f\u5ea6（\u4f60\u7684\u6307\u4ee4\u662f22\u5b57\u8282）
\n#define CMD_MIN_LENGTH 21 \/\/ \u6700\u5c0f\u6307\u4ee4\u957f\u5ea6<\/p>\n

\/\/ ============================
\n\/\/ \u5168\u5c40\u53d8\u91cf
\n\/\/ ============================
\nWS2812B_Color led_buffer[MAX_LED_COUNT];
\nuint8_t current_led_count = DEFAULT_LED_COUNT;<\/p>\n

\/\/ \u7279\u6548\u76f8\u5173\u53d8\u91cf
\nuint8_t effect_mode = MODE_STATIC_COLOR; \/\/ \u5f53\u524d\u6a21\u5f0f
\nuint8_t effect_speed = 30; \/\/ \u7279\u6548\u901f\u5ea6(ms)
\nuint8_t effect_brightness = 150; \/\/ \u7279\u6548\u4eae\u5ea6(0-255)<\/p>\n

\/\/ \u7279\u6548\u4e13\u7528\u53d8\u91cf
\nuint8_t breath_direction = 1; \/\/ \u547c\u5438\u65b9\u5411 0:\u51cf\u5f31 1:\u589e\u5f3a
\nuint8_t breath_current_brightness = 100; \/\/ \u5f53\u524d\u547c\u5438\u4eae\u5ea6
\nWS2812B_Color current_color = {0, 255, 0}; \/\/ \u5f53\u524d\u989c\u8272（\u9ed8\u8ba4\u7eff\u8272）
\nuint16_t rainbow_hue = 0; \/\/ \u8272\u8c03 (0-359)
\nuint16_t flow_position = 0; \/\/ \u6d41\u6c34\u4f4d\u7f6e
\nuint16_t wave_offset = 0; \/\/ \u6ce2\u6d6a\u504f\u79fb
\nuint8_t wipe_position = 0; \/\/ \u626b\u9664\u4f4d\u7f6e
\nuint8_t theater_position = 0; \/\/ \u8ffd\u9010\u4f4d\u7f6e
\nuint8_t theater_color_index = 0; \/\/ \u989c\u8272\u7d22\u5f15<\/p>\n

\/\/ \u4e32\u53e3\u63a5\u6536\u76f8\u5173
\nuint8_t rxbuffer[256];
\nuint8_t rx_count = 0;
\nuint8_t receive_flag = 0;<\/p>\n

\/\/ ============================
\n\/\/ \u51fd\u6570\u58f0\u660e
\n\/\/ ============================
\nvoid dma_config(void);
\nvoid usart_config(void);
\nvoid nvic_config(void);
\nvoid spi_ws2812b_config(void);
\nvoid ws2812b_init(void);
\nvoid ws2812b_set_led(uint16_t led_num, WS2812B_Color color);
\nvoid ws2812b_update(void);
\nvoid ws2812b_clear_all(void);
\nvoid spi_send_data_blocking(uint8_t *data, uint32_t length);
\nvoid ws2812b_color_to_spi(uint8_t r, uint8_t g, uint8_t b, uint8_t *spi_buffer);
\nvoid ws2812b_send_pixel_spi(uint8_t r, uint8_t g, uint8_t b);
\nvoid ws2812b_send_reset_spi(void);
\nvoid ws2812b_update_spi(void);<\/p>\n

\/\/ \u7279\u6548\u51fd\u6570
\nWS2812B_Color hsv_to_rgb(uint16_t h, uint8_t s, uint8_t v);
\nvoid rainbow_breathing_effect(void);
\nvoid single_color_breathing_effect(void);
\nvoid rainbow_flow_effect(void);
\nvoid rainbow_wave_effect(void);
\nvoid color_wipe_effect(void);
\nvoid theater_chase_effect(void);
\nvoid process_effects(void);<\/p>\n

\/\/ ============================
\n\/\/ WS2812B SPI\u914d\u7f6e\u51fd\u6570
\n\/\/ ============================
\nvoid spi_ws2812b_config(void)
\n{
\n spi_parameter_struct spi_init_struct;<\/p>\n

\/\/ \u542f\u7528GPIO\u548cSPI\u65f6\u949f
\n rcu_periph_clock_enable(RCU_GPIOA);
\n rcu_periph_clock_enable(RCU_SPI0);<\/p>\n

\/\/ \u914d\u7f6eSPI\u5f15\u811a（PA5=SCK, PA7=MOSI）
\n gpio_af_set(GPIOA, GPIO_AF_0, GPIO_PIN_5 | GPIO_PIN_7);
\n gpio_mode_set(GPIOA, GPIO_MODE_AF, GPIO_PUPD_NONE, GPIO_PIN_5 | GPIO_PIN_7);
\n gpio_output_options_set(GPIOA, GPIO_OTYPE_PP, GPIO_OSPEED_50MHZ, GPIO_PIN_5 | GPIO_PIN_7);<\/p>\n

\/\/ \u521d\u59cb\u5316SPI
\n spi_i2s_deinit(SPI0);
\n spi_struct_para_init(&spi_init_struct);<\/p>\n

spi_init_struct.trans_mode = SPI_TRANSMODE_BDTRANSMIT;
\n spi_init_struct.device_mode = SPI_MASTER;
\n spi_init_struct.frame_size = SPI_FRAMESIZE_8BIT;
\n spi_init_struct.clock_polarity_phase = SPI_CK_PL_LOW_PH_2EDGE;
\n spi_init_struct.nss = SPI_NSS_SOFT;
\n spi_init_struct.prescale = SPI_CLOCK_DIV;
\n spi_init_struct.endian = SPI_ENDIAN_MSB;<\/p>\n

spi_init(SPI0, &spi_init_struct);
\n spi_enable(SPI0);
\n}<\/p>\n

\/\/ ============================
\n\/\/ SPI\u6570\u636e\u53d1\u9001\u51fd\u6570
\n\/\/ ============================
\nvoid spi_send_data_blocking(uint8_t *data, uint32_t length)
\n{
\n for (uint32_t i = 0; i < length; i++) {
\n while(spi_i2s_flag_get(SPI0, SPI_FLAG_TBE) == RESET);
\n spi_i2s_data_transmit(SPI0, data[i]);
\n }
\n while(spi_i2s_flag_get(SPI0, SPI_FLAG_TRANS) == RESET);
\n}<\/p>\n

\/\/ ============================
\n\/\/ WS2812B\u989c\u8272\u8f6c\u6362\u51fd\u6570
\n\/\/ ============================
\nvoid ws2812b_color_to_spi(uint8_t r, uint8_t g, uint8_t b, uint8_t *spi_buffer)
\n{
\n uint32_t color = ((uint32_t)g << 16) | ((uint32_t)r << 8) | b;
\n uint8_t *ptr = spi_buffer;<\/p>\n

for (int32_t i = 23; i >= 0; i–) {
\n if (color & (1 << i)) {
\n *ptr++ = WS2812B_SPI_1_CODE;
\n } else {
\n *ptr++ = WS2812B_SPI_0_CODE;
\n }
\n }
\n}<\/p>\n

\/\/ ============================
\n\/\/ WS2812B SPI\u9a71\u52a8\u6838\u5fc3\u51fd\u6570
\n\/\/ ============================
\nvoid ws2812b_send_pixel_spi(uint8_t r, uint8_t g, uint8_t b)
\n{
\n uint8_t spi_buffer[24];
\n ws2812b_color_to_spi(r, g, b, spi_buffer);
\n spi_send_data_blocking(spi_buffer, 24);
\n}<\/p>\n

void ws2812b_send_reset_spi(void)
\n{
\n static uint8_t reset_buffer[WS2812B_SPI_RESET_BYTES] = {0};
\n spi_send_data_blocking(reset_buffer, WS2812B_SPI_RESET_BYTES);
\n}<\/p>\n

void ws2812b_update_spi(void)
\n{
\n for (uint16_t i = 0; i < current_led_count; i++) {
\n ws2812b_send_pixel_spi(led_buffer[i].red, led_buffer[i].green, led_buffer[i].blue);
\n }
\n ws2812b_send_reset_spi();
\n}<\/p>\n

\/\/ ============================
\n\/\/ HSV\u8f6cRGB\u51fd\u6570
\n\/\/ ============================
\nWS2812B_Color hsv_to_rgb(uint16_t h, uint8_t s, uint8_t v)
\n{
\n WS2812B_Color rgb = {0, 0, 0};
\n uint8_t region, remainder, p, q, t;<\/p>\n

if (s == 0) {
\n rgb.red = v;
\n rgb.green = v;
\n rgb.blue = v;
\n return rgb;
\n }<\/p>\n

region = h \/ 60;
\n remainder = (h % 60) * 4;<\/p>\n

p = (v * (255 – s)) >> 8;
\n q = (v * (255 – ((s * remainder) >> 8))) >> 8;
\n t = (v * (255 – ((s * (255 – remainder)) >> 8))) >> 8;<\/p>\n

switch (region) {
\n case 0:
\n rgb.red = v; rgb.green = t; rgb.blue = p;
\n break;
\n case 1:
\n rgb.red = q; rgb.green = v; rgb.blue = p;
\n break;
\n case 2:
\n rgb.red = p; rgb.green = v; rgb.blue = t;
\n break;
\n case 3:
\n rgb.red = p; rgb.green = q; rgb.blue = v;
\n break;
\n case 4:
\n rgb.red = t; rgb.green = p; rgb.blue = v;
\n break;
\n default:
\n rgb.red = v; rgb.green = p; rgb.blue = q;
\n break;
\n }<\/p>\n

return rgb;
\n}<\/p>\n

\/\/ ============================
\n\/\/ \u5f69\u8679\u547c\u5438\u706f\u6548\u679c
\n\/\/ ============================
\nvoid rainbow_breathing_effect(void)
\n{
\n rainbow_hue += 1;
\n if (rainbow_hue >= 360) {
\n rainbow_hue = 0;
\n }<\/p>\n

if (breath_direction) {
\n breath_current_brightness += 2;
\n if (breath_current_brightness >= effect_brightness) {
\n breath_direction = 0;
\n breath_current_brightness = effect_brightness;
\n }
\n } else {
\n breath_current_brightness -= 2;
\n if (breath_current_brightness <= 50) {
\n breath_direction = 1;
\n breath_current_brightness = 50;
\n }
\n }<\/p>\n

WS2812B_Color rainbow_color = hsv_to_rgb(rainbow_hue, 255, breath_current_brightness);<\/p>\n

for (uint16_t i = 0; i < current_led_count; i++) {
\n led_buffer[i] = rainbow_color;
\n }
\n}<\/p>\n

\/\/ ============================
\n\/\/ \u5355\u8272\u547c\u5438\u706f\u6548\u679c
\n\/\/ ============================
\nvoid single_color_breathing_effect(void)
\n{
\n if (breath_direction) {
\n breath_current_brightness += 2;
\n if (breath_current_brightness >= effect_brightness) {
\n breath_direction = 0;
\n breath_current_brightness = effect_brightness;
\n }
\n } else {
\n breath_current_brightness -= 2;
\n if (breath_current_brightness <= 50) {
\n breath_direction = 1;
\n breath_current_brightness = 50;
\n }
\n }<\/p>\n

WS2812B_Color current_color_adj;
\n current_color_adj.red = (current_color.red * breath_current_brightness) \/ effect_brightness;
\n current_color_adj.green = (current_color.green * breath_current_brightness) \/ effect_brightness;
\n current_color_adj.blue = (current_color.blue * breath_current_brightness) \/ effect_brightness;<\/p>\n

for (uint16_t i = 0; i < current_led_count; i++) {
\n led_buffer[i] = current_color_adj;
\n }
\n}<\/p>\n

\/\/ ============================
\n\/\/ \u5f69\u8679\u6d41\u6c34\u706f\u6548\u679c
\n\/\/ ============================
\nvoid rainbow_flow_effect(void)
\n{
\n flow_position++;
\n if (flow_position >= current_led_count) {
\n flow_position = 0;
\n }<\/p>\n

WS2812B_Color black = {0, 0, 0};
\n for (uint16_t i = 0; i < current_led_count; i++) {
\n led_buffer[i] = black;
\n }<\/p>\n

for (uint8_t i = 0; i < 3; i++) {
\n uint16_t pos = (flow_position + i) % current_led_count;
\n uint16_t hue = (rainbow_hue + i * 30) % 360;
\n WS2812B_Color color = hsv_to_rgb(hue, 255, effect_brightness);
\n led_buffer[pos] = color;
\n }<\/p>\n

rainbow_hue += 3;
\n if (rainbow_hue >= 360) {
\n rainbow_hue = 0;
\n }
\n}<\/p>\n

\/\/ ============================
\n\/\/ \u5f69\u8679\u6ce2\u6d6a\u6548\u679c
\n\/\/ ============================
\nvoid rainbow_wave_effect(void)
\n{
\n wave_offset += 3;
\n if (wave_offset >= 360) {
\n wave_offset = 0;
\n }<\/p>\n

for (uint16_t i = 0; i < current_led_count; i++) {
\n uint16_t hue = (wave_offset + i * 360 \/ current_led_count) % 360;
\n WS2812B_Color color = hsv_to_rgb(hue, 255, effect_brightness);
\n led_buffer[i] = color;
\n }
\n}<\/p>\n

\/\/ ============================
\n\/\/ \u989c\u8272\u626b\u9664\u6548\u679c
\n\/\/ ============================
\nvoid color_wipe_effect(void)
\n{
\n wipe_position++;
\n if (wipe_position >= current_led_count) {
\n wipe_position = 0;
\n }<\/p>\n

led_buffer[wipe_position] = current_color;<\/p>\n

static uint8_t last_position = 0;
\n if (wipe_position != last_position) {
\n led_buffer[last_position] = (WS2812B_Color){0, 0, 0};
\n last_position = wipe_position;
\n }
\n}<\/p>\n

\/\/ ============================
\n\/\/ \u5267\u573a\u8ffd\u9010\u6548\u679c
\n\/\/ ============================
\nvoid theater_chase_effect(void)
\n{
\n theater_position = (theater_position + 1) % 3;<\/p>\n

WS2812B_Color chase_colors[3] = {
\n {0, 255, 0}, \/\/ \u7eff\u8272
\n {0, 0, 255}, \/\/ \u84dd\u8272
\n {255, 0, 0} \/\/ \u7ea2\u8272
\n };<\/p>\n

theater_color_index = (theater_color_index + 1) % 3;<\/p>\n

for (uint16_t i = 0; i < current_led_count; i++) {
\n if ((i + theater_position) % 3 == 0) {
\n led_buffer[i] = chase_colors[theater_color_index];
\n } else {
\n led_buffer[i] = (WS2812B_Color){0, 0, 0};
\n }
\n }
\n}<\/p>\n

\/\/ ============================
\n\/\/ \u5904\u7406\u7279\u6548
\n\/\/ ============================
\nvoid process_effects(void)
\n{
\n switch (effect_mode) {
\n case MODE_RAINBOW_BREATH:
\n rainbow_breathing_effect();
\n break;<\/p>\n

case MODE_SINGLE_COLOR_BREATH:
\n single_color_breathing_effect();
\n break;<\/p>\n

case MODE_RAINBOW_FLOW:
\n rainbow_flow_effect();
\n break;<\/p>\n

case MODE_RAINBOW_WAVE:
\n rainbow_wave_effect();
\n break;<\/p>\n

case MODE_COLOR_WIPE:
\n color_wipe_effect();
\n break;<\/p>\n

case MODE_THEATER_CHASE:
\n theater_chase_effect();
\n break;<\/p>\n

case MODE_STATIC_COLOR:
\n default:
\n return;
\n }<\/p>\n

ws2812b_update();
\n}<\/p>\n

\/\/ ============================
\n\/\/ WS2812B\u7528\u6237API\u51fd\u6570
\n\/\/ ============================
\nvoid ws2812b_init(void)
\n{
\n spi_ws2812b_config();
\n ws2812b_clear_all();
\n}<\/p>\n

void ws2812b_set_led(uint16_t led_num, WS2812B_Color color)
\n{
\n if (led_num > 0 && led_num <= current_led_count) {
\n led_buffer[led_num – 1] = color;
\n }
\n}<\/p>\n

void ws2812b_update(void)
\n{
\n ws2812b_update_spi();
\n}<\/p>\n

void ws2812b_clear_all(void)
\n{
\n WS2812B_Color black = {0, 0, 0};<\/p>\n

for (uint16_t i = 0; i < MAX_LED_COUNT; i++) {
\n led_buffer[i] = black;
\n }<\/p>\n

ws2812b_update();
\n}<\/p>\n

\/\/ ============================
\n\/\/ \u4e32\u53e3DMA\u914d\u7f6e\u51fd\u6570
\n\/\/ ============================
\n#define USART0_RDATA_ADDRESS ((uint32_t)&USART_RDATA(USART0))<\/p>\n

void dma_config(void)
\n{
\n dma_parameter_struct dma_init_struct;<\/p>\n

rcu_periph_clock_enable(RCU_DMA);<\/p>\n

dma_deinit(DMA_CH2);
\n dma_init_struct.direction = DMA_PERIPHERAL_TO_MEMORY;
\n dma_init_struct.memory_addr = (uint32_t)rxbuffer;
\n dma_init_struct.memory_inc = DMA_MEMORY_INCREASE_ENABLE;
\n dma_init_struct.memory_width = DMA_MEMORY_WIDTH_8BIT;
\n dma_init_struct.number = 256;
\n dma_init_struct.periph_addr = (uint32_t)USART0_RDATA_ADDRESS;
\n dma_init_struct.periph_inc = DMA_PERIPH_INCREASE_DISABLE;
\n dma_init_struct.periph_width = DMA_PERIPHERAL_WIDTH_8BIT;
\n dma_init_struct.priority = DMA_PRIORITY_ULTRA_HIGH;
\n dma_init(DMA_CH2, &dma_init_struct);
\n dma_circulation_disable(DMA_CH2);
\n dma_channel_enable(DMA_CH2);
\n}<\/p>\n

void usart_config(void)
\n{
\n rcu_periph_clock_enable(RCU_GPIOA);
\n rcu_periph_clock_enable(RCU_USART0);<\/p>\n

gpio_af_set(GPIOA, GPIO_AF_1, GPIO_PIN_9);
\n gpio_af_set(GPIOA, GPIO_AF_1, GPIO_PIN_10);<\/p>\n

gpio_mode_set(GPIOA, GPIO_MODE_AF, GPIO_PUPD_PULLUP, GPIO_PIN_9);
\n gpio_output_options_set(GPIOA, GPIO_OTYPE_PP, GPIO_OSPEED_10MHZ, GPIO_PIN_9);<\/p>\n

gpio_mode_set(GPIOA, GPIO_MODE_AF, GPIO_PUPD_PULLUP, GPIO_PIN_10);
\n gpio_output_options_set(GPIOA, GPIO_OTYPE_PP, GPIO_OSPEED_10MHZ, GPIO_PIN_10);<\/p>\n

usart_deinit(USART0);
\n usart_baudrate_set(USART0, 115200U);
\n usart_receive_config(USART0, USART_RECEIVE_ENABLE);
\n usart_transmit_config(USART0, USART_TRANSMIT_ENABLE);
\n usart_dma_receive_config(USART0, USART_DENR_ENABLE);
\n usart_dma_transmit_config(USART0, USART_DENR_ENABLE);
\n usart_enable(USART0);
\n}<\/p>\n

void nvic_config(void)
\n{
\n nvic_irq_enable(USART0_IRQn, 0, 0);
\n}<\/p>\n

\/\/ ============================
\n\/\/ \u4e3b\u51fd\u6570（\u9002\u914d\u4f60\u768422\u5b57\u8282\u6307\u4ee4）
\n\/\/ ============================
\nint main(void)
\n{
\n systick_config();
\n nvic_config();
\n dma_config();
\n usart_config();
\n ws2812b_init();
\n ws2812b_clear_all();<\/p>\n

while(RESET == usart_flag_get(USART0, USART_FLAG_IDLE));
\n usart_flag_clear(USART0, USART_FLAG_IDLE);
\n usart_interrupt_enable(USART0, USART_INT_IDLE);<\/p>\n

printf("\\\\n\\\\rWS2812B Driver Ready (22-byte command mode)\\\\n\\\\r");
\n printf("Default command: DD 55 EE 00 00 00 01 00 99 01 00 00 00 03 00 [LED] [R] [G] [B] AA BB");<\/p>\n

while(1) {
\n if(1 == receive_flag) {
\n \/\/ \u68c0\u67e5\u6307\u4ee4\u957f\u5ea6\u662f\u5426\u4e3a22\u5b57\u8282
\n if (rx_count >= CMD_MIN_LENGTH) {
\n \/\/ \u68c0\u67e5\u6570\u636e\u5934
\n if (rxbuffer[CMD_HEADER_0] == 0xDD &&
\n rxbuffer[CMD_HEADER_1] == 0x55 &&
\n rxbuffer[CMD_HEADER_2] == 0xEE) {<\/p>\n

\/\/ \u63d0\u53d6\u6a21\u5f0f（\u4f60\u7684\u4e0a\u4f4d\u673a\u56fa\u5b9a\u4e3a00）
\n uint8_t mode = rxbuffer[CMD_MODE_SELECT];<\/p>\n

\/\/ \u63d0\u53d6\u53c2\u6570（\u4f60\u7684\u4e0a\u4f4d\u673a\u56fa\u5b9a\u503c，\u53ef\u6682\u65f6\u5ffd\u7565）
\n effect_speed = rxbuffer[CMD_EFFECT_SPEED];
\n effect_brightness = rxbuffer[CMD_EFFECT_BRIGHTNESS];<\/p>\n

\/\/ \u63d0\u53d6LED\u6570\u91cf（\u4f60\u7684\u6307\u4ee4\u7d22\u5f1515）
\n uint8_t new_led_count = rxbuffer[CMD_LED_COUNT];<\/p>\n

\/\/ \u68c0\u67e5LED\u6570\u91cf\u662f\u5426\u6709\u6548
\n if (new_led_count > 0 && new_led_count <= MAX_LED_COUNT) {
\n current_led_count = new_led_count;
\n printf("LED count updated to: %d\\\\n\\\\r", current_led_count);
\n } else {
\n printf("Error: Invalid LED count: %d\\\\n\\\\r", new_led_count);
\n }<\/p>\n

\/\/ \u63d0\u53d6\u989c\u8272\u503c（\u4f60\u7684\u6307\u4ee4\u7d22\u5f1516-18）
\n uint8_t cmd_R = rxbuffer[CMD_COLOR_R];
\n uint8_t cmd_G = rxbuffer[CMD_COLOR_G];
\n uint8_t cmd_B = rxbuffer[CMD_COLOR_B];<\/p>\n

printf("Color: R=%d, G=%d, B=%d\\\\n\\\\r", cmd_R, cmd_G, cmd_B);<\/p>\n

\/\/ \u4fdd\u5b58\u989c\u8272
\n current_color.red = cmd_R;
\n current_color.green = cmd_G;
\n current_color.blue = cmd_B;<\/p>\n

\/\/ \u6839\u636e\u6a21\u5f0f\u5904\u7406
\n effect_mode = mode;<\/p>\n

if (mode == MODE_STATIC_COLOR) {
\n \/\/ \u9759\u6001\u989c\u8272\u6a21\u5f0f – \u9002\u914d\u4f60\u7684\u4e0a\u4f4d\u673a
\n WS2812B_Color target_color = {cmd_G, cmd_R, cmd_B}; \/\/ WS2812B\u4f7f\u7528GRB\u987a\u5e8f<\/p>\n

\/\/ \u8bbe\u7f6e\u6240\u6709LED\u7684\u989c\u8272
\n for (uint16_t i = 0; i < current_led_count; i++) {
\n ws2812b_set_led(i + 1, target_color);
\n }<\/p>\n

\/\/ \u66f4\u65b0LED\u663e\u793a
\n ws2812b_update();
\n printf("Static color mode applied\\\\n\\\\r");<\/p>\n

} else if (mode == MODE_SINGLE_COLOR_BREATH) {
\n \/\/ \u5355\u8272\u547c\u5438\u706f\u6a21\u5f0f
\n breath_current_brightness = 100;
\n breath_direction = 1;
\n printf("Single color breath mode activated\\\\n\\\\r");<\/p>\n

} else if (mode == MODE_RAINBOW_BREATH) {
\n \/\/ \u5f69\u8679\u547c\u5438\u706f\u6a21\u5f0f
\n breath_current_brightness = 100;
\n breath_direction = 1;
\n rainbow_hue = 0;
\n printf("Rainbow breath mode activated\\\\n\\\\r");<\/p>\n

} else if (mode == MODE_RAINBOW_FLOW) {
\n \/\/ \u5f69\u8679\u6d41\u6c34\u706f\u6a21\u5f0f
\n flow_position = 0;
\n rainbow_hue = 0;
\n printf("Rainbow flow mode activated\\\\n\\\\r");<\/p>\n

} else if (mode == MODE_RAINBOW_WAVE) {
\n \/\/ \u5f69\u8679\u6ce2\u6d6a\u6a21\u5f0f
\n wave_offset = 0;
\n printf("Rainbow wave mode activated\\\\n\\\\r");<\/p>\n

} else if (mode == MODE_COLOR_WIPE) {
\n \/\/ \u989c\u8272\u626b\u9664\u6a21\u5f0f
\n wipe_position = 0;
\n printf("Color wipe mode activated\\\\n\\\\r");<\/p>\n

} else if (mode == MODE_THEATER_CHASE) {
\n \/\/ \u5267\u573a\u8ffd\u9010\u6a21\u5f0f
\n theater_position = 0;
\n theater_color_index = 0;
\n printf("Theater chase mode activated\\\\n\\\\r");<\/p>\n

} else {
\n \/\/ \u672a\u77e5\u6a21\u5f0f，\u9ed8\u8ba4\u4f7f\u7528\u9759\u6001\u989c\u8272
\n effect_mode = MODE_STATIC_COLOR;
\n WS2812B_Color target_color = {cmd_G, cmd_R, cmd_B};<\/p>\n

for (uint16_t i = 0; i < current_led_count; i++) {
\n ws2812b_set_led(i + 1, target_color);
\n }
\n ws2812b_update();<\/p>\n

printf("Unknown mode %d, using static color\\\\n\\\\r", mode);
\n }<\/p>\n

} else {
\n printf("Error: Invalid data header: %02X %02X %02X\\\\n\\\\r",
\n rxbuffer[0], rxbuffer[1], rxbuffer[2]);
\n }
\n } else {
\n printf("Error: Received data too short: %d bytes (expected %d)\\\\n\\\\r",
\n rx_count, CMD_MIN_LENGTH);
\n }<\/p>\n

receive_flag = 0;
\n }<\/p>\n

\/\/ \u5904\u7406\u7279\u6548\u6a21\u5f0f
\n if (effect_mode != MODE_STATIC_COLOR) {
\n process_effects();
\n delay_1ms(effect_speed);
\n } else {
\n \/\/ \u9759\u6001\u6a21\u5f0f，\u5c0f\u5ef6\u65f6
\n delay_1ms(10);
\n }
\n }
\n}<\/p>\n

\/\/ ============================
\n\/\/ \u4e32\u53e3\u8f93\u51fa\u91cd\u5b9a\u5411
\n\/\/ ============================
\n#ifdef GD_ECLIPSE_GCC
\nint __io_putchar(int ch)
\n{
\n usart_data_transmit(EVAL_COM0, (uint8_t)ch);
\n while(RESET == usart_flag_get(EVAL_COM0, USART_FLAG_TBE));
\n return ch;
\n}
\n#else
\nint fputc(int ch, FILE *f)
\n{
\n usart_data_transmit(EVAL_COM0, (uint8_t)ch);
\n while(RESET == usart_flag_get(EVAL_COM0, USART_FLAG_TBE));
\n return ch;
\n}
\n#endif \/* GD_ECLIPSE_GCC *\/<\/p>\n","protected":false},"excerpt":{"rendered":"

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