写一个用stm32f103c8t6驱动120个ws2812灯流水灯的代码

以下是一个可以驱动120个WS2812流水灯的基础代码，你可以根据自己的需求进行修改：

#include "stm32f10x.h"
#include "FastLED.h"

#define LED_PIN 3
#define NUM_LEDS 120

CRGB leds[NUM_LEDS];

void GPIO_Configuration(void)
{
    GPIO_InitTypeDef GPIO_InitStructure;

    RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE);

    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_3;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_Init(GPIOA, &GPIO_InitStructure);
}

void TIM_Configuration(void)
{
    TIM_TimeBaseInitTypeDef TIM_TimeBaseInitStructure;

    RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2, ENABLE);

    TIM_TimeBaseInitStructure.TIM_Period = 35999;
    TIM_TimeBaseInitStructure.TIM_Prescaler = 71;
    TIM_TimeBaseInitStructure.TIM_ClockDivision = 0;
    TIM_TimeBaseInitStructure.TIM_CounterMode = TIM_CounterMode_Up;
    TIM_TimeBaseInit(TIM2, &TIM_TimeBaseInitStructure);

    TIM_OCInitTypeDef TIM_OCInitStructure;

    TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1;
    TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
    TIM_OCInitStructure.TIM_Pulse = 0;
    TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High;
    TIM_OC1Init(TIM2, &TIM_OCInitStructure);

    TIM_Cmd(TIM2, ENABLE);
}

void setup()
{
    GPIO_Configuration();
    TIM_Configuration();
    FastLED.addLeds<WS2812, LED_PIN, GRB>(leds, NUM_LEDS);
}

void loop()
{
    for (int i = 0; i < NUM_LEDS; i++)
    {
        leds[i] = CRGB::Red;
        FastLED.show();
        delay(10);
    }

    for (int i = 0; i < NUM_LEDS; i++)
    {
        leds[i] = CRGB::Black;
        FastLED.show();
        delay(10);
    }

    for (int i = 0; i < NUM_LEDS; i++)
    {
        leds[i] = CRGB::Green;
        FastLED.show();
        delay(10);
    }

    for (int i = 0; i < NUM_LEDS; i++)
    {
        leds[i] = CRGB::Black;
        FastLED.show();
        delay(10);
    }

    for (int i = 0; i < NUM_LEDS; i++)
    {
        leds[i] = CRGB::Blue;
        FastLED.show();
        delay(10);
    }

    for (int i = 0; i < NUM_LEDS; i++)
    {
        leds[i] = CRGB::Black;
        FastLED.show();
        delay(10);
    }
}

以上代码使用了FastLED库来控制灯光，通过修改leds数组来实现不同颜色的流水灯效果。由于驱动120个WS2812灯珠需要大量的计算资源，因此需要适当增加延时时间。如果需要实现更复杂的流水灯效果，建议使用DMA方式驱动WS2812灯珠，以提高效率。