Keil编写代码实现全彩色呼吸灯和SPWM输出

好的，下面我将给出一个基于Keil编写代码实现全彩色呼吸灯和SPWM输出的示例代码。

代码主要分为以下几个部分：

1. 头文件包含和全局变量定义

#include "stm32f10x.h"

#define LED_R_Pin GPIO_Pin_8
#define LED_R_Port GPIOB
#define LED_G_Pin GPIO_Pin_9
#define LED_G_Port GPIOB
#define LED_B_Pin GPIO_Pin_7
#define LED_B_Port GPIOB

#define POT_Pin GPIO_Pin_0
#define POT_Channel ADC_Channel_0
#define POT_Port GPIOA

uint16_t potValue = 0;
uint16_t sinTable[100] = {500, 524, 548, 572, 595, 619, 642, 665, 687, 709, 730, 750, 770, 789, 808, 826, 843, 859, 875, 890, 904, 917, 929, 940, 950, 959, 967, 974, 980, 985, 989, 992, 994, 995, 994, 992, 989, 985, 980, 974, 967, 959, 950, 940, 929, 917, 904, 890, 875, 859, 843, 826, 808, 789, 770, 750, 730, 709, 687, 665, 642, 619, 595, 572, 548, 524, 500, 476, 452, 428, 405, 381, 358, 335, 313, 291, 270, 250, 230, 211, 192, 174, 157, 141, 125, 110, 96, 83, 71, 60, 50, 41, 33, 26, 20, 15, 11, 8, 6, 5, 6, 8, 11, 15, 20, 26, 33, 41, 50, 60, 71, 83, 96, 110, 125, 141, 157, 174, 192, 211, 230, 250, 270, 291, 313, 335, 358, 381, 405, 428, 452, 476};

这里定义了LED和电位器的引脚、端口等信息以及正弦波表和全局变量。

2. GPIO口、ADC和定时器的初始化

void GPIO_Configuration(void)
{
  GPIO_InitTypeDef GPIO_InitStructure;

  RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB | RCC_APB2Periph_GPIOA, ENABLE);

  GPIO_InitStructure.GPIO_Pin = LED_R_Pin | LED_G_Pin | LED_B_Pin;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
  GPIO_Init(LED_R_Port, &GPIO_InitStructure);

  GPIO_InitStructure.GPIO_Pin = POT_Pin;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AIN;
  GPIO_Init(POT_Port, &GPIO_InitStructure);
}

void ADC_Configuration(void)
{
  ADC_InitTypeDef ADC_InitStructure;

  RCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC1, ENABLE);

  ADC_InitStructure.ADC_Mode = ADC_Mode_Independent;
  ADC_InitStructure.ADC_ScanConvMode = DISABLE;
  ADC_InitStructure.ADC_ContinuousConvMode = DISABLE;
  ADC_InitStructure.ADC_ExternalTrigConv = ADC_ExternalTrigConv_None;
  ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right;
  ADC_InitStructure.ADC_NbrOfChannel = 1;
  ADC_Init(ADC1, &ADC_InitStructure);

  ADC_RegularChannelConfig(ADC1, POT_Channel, 1, ADC_SampleTime_55Cycles5);
  ADC_Cmd(ADC1, ENABLE);
}

void TIM_Configuration(void)
{
  TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
  TIM_OCInitTypeDef TIM_OCInitStructure;

  RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM3, ENABLE);

  TIM_TimeBaseStructure.TIM_Period = 999;
  TIM_TimeBaseStructure.TIM_Prescaler = 71;
  TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1;
  TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
  TIM_TimeBaseInit(TIM3, &TIM_TimeBaseStructure);

  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(TIM3, &TIM_OCInitStructure);
  TIM_OC1PreloadConfig(TIM3, TIM_OCPreload_Enable);

  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_OC2Init(TIM3, &TIM_OCInitStructure);
  TIM_OC2PreloadConfig(TIM3, TIM_OCPreload_Enable);

  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_OC3Init(TIM3, &TIM_OCInitStructure);
  TIM_OC3PreloadConfig(TIM3, TIM_OCPreload_Enable);

  TIM_Cmd(TIM3, ENABLE);
}

这里包括GPIO口、ADC和定时器的初始化。其中GPIO口需要配置为PWM输出模式和模拟输入模式，定时器需要设置为PWM模式。

3. 主函数代码

int main(void)
{
  GPIO_Configuration();
  ADC_Configuration();
  TIM_Configuration();

  while (1)
  {
    potValue = ADC_GetConversionValue(ADC1);

    TIM_SetCompare1(TIM3, potValue);
    TIM_SetCompare2(TIM3, potValue);
    TIM_SetCompare3(TIM3, potValue);

    for (int i = 0; i < 100; i++)
    {
      TIM_SetCompare1(TIM3, sinTable[i] * potValue / 1000);
      TIM_SetCompare2(TIM3, sinTable[(i + 33) % 100] * potValue / 1000);
      TIM_SetCompare3(TIM3, sinTable[(i + 66) % 100] * potValue / 1000);
      for (int j = 0; j < 10000; j++)
        ;
    }
  }
}

在主函数中，我们首先进行GPIO口、ADC和定时器的初始化。然后在一个while循环中，读取电位器的值，并设置PWM波形的占空比。使用一个for循环和正弦波表来生成SPWM波形，并改变PWM波形的占空比，实现SPWM输出。

希望这个示例代码能够帮助你实现全彩色呼吸灯和SPWM输出。如果你有任何问题，欢迎随时询问。