WS2812 HAL库 PWM 程序 stm32f030k6 TIM1-1

对于使用STM32F030K6芯片和TIM1通道1的WS2812 HAL库PWM程序，以下是一个基本的代码示例：

#include "stm32f0xx_hal.h"

#define WS2812_LED_COUNT 8
#define WS2812_TIM_PERIOD 50
#define WS2812_TIM_PRESCALER ((SystemCoreClock / 1000000) - 1)

typedef struct {
    uint8_t red;
    uint8_t green;
    uint8_t blue;
} WS2812_RGB;

WS2812_RGB ws2812_buffer[WS2812_LED_COUNT];

TIM_HandleTypeDef htim;

void WS2812_PWM_Init(void) {
    __HAL_RCC_TIM1_CLK_ENABLE();

    htim.Instance = TIM1;
    htim.Init.Prescaler = WS2812_TIM_PRESCALER;
    htim.Init.CounterMode = TIM_COUNTERMODE_UP;
    htim.Init.Period = WS2812_TIM_PERIOD;
    htim.Init.ClockDivision = TIM_CLOCKDIVISION_DIV1;
    HAL_TIM_PWM_Init(&htim);

    GPIO_InitTypeDef GPIO_InitStruct;
    GPIO_InitStruct.Pin = GPIO_PIN_8; // 使用PA8引脚，根据实际情况修改
    GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
    GPIO_InitStruct.Pull = GPIO_NOPULL;
    GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_HIGH;
    GPIO_InitStruct.Alternate = GPIO_AF2_TIM1;
    HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
}

void WS2812_Update_Buffer(void) {
    for (uint8_t i = 0; i < WS2812_LED_COUNT; i++) {
        WS2812_RGB *rgb = &ws2812_buffer[i];

        for (uint8_t j = 0; j < 8; j++) {
            uint16_t high_time = (rgb->green & (0x80 >> j)) ? (WS2812_TIM_PERIOD * 7 / 12) : (WS2812_TIM_PERIOD * 4 / 12);

            TIM_OC_InitTypeDef sConfigOC;
            sConfigOC.OCMode = TIM_OCMODE_PWM1;
            sConfigOC.Pulse = high_time;
            sConfigOC.OCPolarity = TIM_OCPOLARITY_HIGH;
            sConfigOC.OCFastMode = TIM_OCFAST_DISABLE;
            HAL_TIM_PWM_ConfigChannel(&htim, &sConfigOC, TIM_CHANNEL_1);

            HAL_TIM_PWM_Start(&htim, TIM_CHANNEL_1);

            HAL_Delay(1);

            HAL_TIM_PWM_Stop(&htim, TIM_CHANNEL_1);
        }
    }
}

请注意，上述代码中的引脚配置使用了PA8引脚作为PWM输出引脚，您可以根据实际情况修改为您所需的引脚。另外，还需要根据自己的需求修改WS2812_LED_COUNT和WS2812_TIM_PERIOD等参数。

在使用该代码之前，您需要先初始化PWM定时器和GPIO引脚，并将数据写入ws2812_buffer数组中，然后调用WS2812_Update_Buffer函数即可更新WS2812 LED的颜色。

希望以上代码能帮助到您！如果您有任何疑问，请随时提问。