用keil5点亮WB2812RGB灯带

要用 Keil5 点亮 WS2812B RGB 灯带，需要连接单片机和 WS2812B 灯带，然后通过 Keil5 编写程序，控制单片机的输出口来控制 WS2812B 灯带的亮度和颜色。以下是一个简单的代码示例，可以通过 Keil5 控制 WS2812B RGB 灯带：

#include <stm32f4xx.h>
#include <string.h>

#define LED_NUMBER 8
#define LED_BYTES (LED_NUMBER * 3)
#define LED_PIN GPIO_Pin_12
#define LED_PORT GPIOB

void GPIO_Configuration(void);
void TIM_Configuration(void);
void Send_LED_Data(uint8_t *led_data);

int main(void)
{
    uint8_t led_data[LED_BYTES] = {0};
    uint8_t color[3] = {0, 0, 0};
    uint8_t i;

    GPIO_Configuration();
    TIM_Configuration();

    while(1)
    {
        // 设置颜色值
        color[0] = 0x80;   // 红色通道
        color[1] = 0x00;   // 绿色通道
        color[2] = 0x00;   // 蓝色通道

        // 将颜色值写入 LED 数据
        for(i = 0; i < LED_NUMBER; i++)
        {
            memcpy(&led_data[i * 3], color, 3);
        }

        // 发送 LED 数据
        Send_LED_Data(led_data);

        // 延时
        Delay(500);
    }
}

void GPIO_Configuration(void)
{
    GPIO_InitTypeDef GPIO_InitStructure;

    RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOB, ENABLE);

    GPIO_InitStructure.GPIO_Pin = LED_PIN;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
    GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;
    GPIO_Init(LED_PORT, &GPIO_InitStructure);
    GPIO_PinAFConfig(LED_PORT, GPIO_PinSource12, GPIO_AF_TIM1);
}

void TIM_Configuration(void)
{
    TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
    TIM_OCInitTypeDef TIM_OCInitStructure;
    uint16_t Period = 89;
    uint16_t Prescaler = 6;

    RCC_APB2PeriphClockCmd(RCC_APB2Periph_TIM1, ENABLE);

    TIM_TimeBaseStructure.TIM_Period = Period;
    TIM_TimeBaseStructure.TIM_Prescaler = Prescaler;
    TIM_TimeBaseStructure.TIM_ClockDivision = 0;
    TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
    TIM_TimeBaseInit(TIM1, &TIM_TimeBaseStructure);

    TIM_OCStructInit(&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(TIM1, &TIM_OCInitStructure);

    TIM_OC1PreloadConfig(TIM1, TIM_OCPreload_Enable);
    TIM_ARRPreloadConfig(TIM1, ENABLE);
    TIM_Cmd(TIM1, ENABLE);
}

void Send_LED_Data(uint8_t *led_data)
{
    uint16_t i;
    uint8_t data;

    __disable_irq();    // 关闭中断

    for(i = 0; i < LED_BYTES; i++)
    {
        data = led_data[i];

        __asm("cpsid i");   // 关闭 IRQ 中断
        TIM1->CCR1 = 0;
        Delay(2);

        for(uint8_t j = 0; j < 8; j++)
        {
            if(data & 0x80)
            {
                TIM1->CCR1 = 63;
                Delay(1);
                TIM1->CCR1 = 0;
                Delay(2);
            }
            else
            {
                TIM1->CCR1 = 63;
                Delay(1);
                TIM1->CCR1 = 0;
                Delay(1);
            }
            data <<= 1;
        }
    }

    __enable_irq(); // 开启中断
}

void Delay(__IO uint32_t nCount)
{
    while(nCount--)
    {
    }
}

以上代码将点亮 8 个 WS2812B RGB 灯，每个灯都设置为红色。你需要根据自己的硬件连接情况修改代码中的引脚定义和 GPIO、定时器初始化部分，以及调整 WS2812B 灯带的颜色和亮度。