stm32f103c8t6正弦波代码

您好！以下是一个使用STM32F103C8T6微控制器生成正弦波的示例代码：

#include "stm32f10x.h"

#define TABLE_SIZE 360
#define AMPLITUDE 1000
#define OFFSET 2048

uint16_t sin_table[TABLE_SIZE];

void TIM2_IRQHandler(void)
{
    if (TIM_GetITStatus(TIM2, TIM_IT_Update) != RESET)
    {
        static uint16_t phase = 0;
        uint16_t sin_value = sin_table[phase];

        TIM_SetCompare1(TIM2, sin_value + OFFSET);

        phase++;
        if (phase >= TABLE_SIZE)
        {
            phase = 0;
        }

        TIM_ClearITPendingBit(TIM2, TIM_IT_Update);
    }
}

void TIM2_Configuration(void)
{
    TIM_TimeBaseInitTypeDef TIM_TimeBaseInitStruct;
    TIM_OCInitTypeDef TIM_OCInitStruct;
    GPIO_InitTypeDef GPIO_InitStructure;
    NVIC_InitTypeDef NVIC_InitStructure;

    RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2, ENABLE);

    TIM_TimeBaseInitStruct.TIM_Prescaler = SystemCoreClock / 1000000 - 1;
    TIM_TimeBaseInitStruct.TIM_CounterMode = TIM_CounterMode_Up;
    TIM_TimeBaseInitStruct.TIM_Period = 100 - 1;
    TIM_TimeBaseInitStruct.TIM_ClockDivision = TIM_CKD_DIV1;
    TIM_TimeBaseInitStruct.TIM_RepetitionCounter = 0;

    TIM_TimeBaseInit(TIM2, &TIM_TimeBaseInitStruct);

    TIM_OCInitStruct.TIM_OCMode = TIM_OCMode_PWM1;
    TIM_OCInitStruct.TIM_OutputState = TIM_OutputState_Enable;
    TIM_OCInitStruct.TIM_OutputNState = TIM_OutputNState_Disable;
    TIM_OCInitStruct.TIM_Pulse = OFFSET;
    TIM_OCInitStruct.TIM_OCPolarity = TIM_OCPolarity_High;
    TIM_OCInitStruct.TIM_OCNPolarity = TIM_OCNPolarity_High;
    TIM_OCInitStruct.TIM_OCIdleState = TIM_OCIdleState_Reset;
    TIM_OCInitStruct.TIM_OCNIdleState = TIM_OCNIdleState_Reset;

    TIM_OC1Init(TIM2, &TIM_OCInitStruct);

    TIM_Cmd(TIM2, ENABLE);
    TIM_CtrlPWMOutputs(TIM2, ENABLE);

    TIM_ITConfig(TIM2, TIM_IT_Update, ENABLE);

    NVIC_InitStructure.NVIC_IRQChannel = TIM2_IRQn;
    NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
    NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
    NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;

    NVIC_Init(&NVIC_InitStructure);
}

void SinTable_Init(void)
{
    for (int i = 0; i < TABLE_SIZE; i++)
    {
        sin_table[i] = (uint16_t)((AMPLITUDE * sin(2 * 3.1415 * i / TABLE_SIZE)) + OFFSET);
    }
}

int main(void)
{
    SinTable_Init();
    TIM2_Configuration();

    while (1)
    {
    }
}

此代码使用TIM2定时器和PWM输出来生成一个正弦波。通过在一个包含360个取样值的正弦表中循环，每次更新定时器都会从表中读取一个值，并将其写入PWM比较器以生成PWM信号。

请确保已正确配置STM32F103C8T6的时钟和GPIO引脚，并在TIM2通道1的PWM输出引脚上连接一个外部设备（如示波器）来观察生成的正弦波形。

希望对您有所帮助！如果您有任何其他问题，请随时提问。