AT32F425无刷电机驱动代码

AT32F425是一款基于ARM Cortex-M4内核的微控制器，可以用来驱动无刷电机。以下是一个简单的AT32F425无刷电机驱动代码示例：

#include "at32f4xx.h"
#include "at32_board.h"

#define PWM_FREQ 20000
#define PWM_DUTY 50

void PWM_Configuration(void)
{
    GPIO_InitType GPIO_InitStructure;
    TMR_TimerBaseInitType  TMR_TimeBaseStructure;
    TMR_OCInitType  TMR_OCInitStructure;

    /* Enable GPIO clock */
    RCC_APB2PeriphClockCmd(RCC_APB2PERIPH_GPIOA, ENABLE);

    /* Configure PA6 as PWM output */
    GPIO_StructInit(&GPIO_InitStructure);
    GPIO_InitStructure.GPIO_Pins = GPIO_Pins_6;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
    GPIO_InitStructure.GPIO_MaxSpeed = GPIO_MaxSpeed_50MHz;
    GPIO_Init(GPIOA, &GPIO_InitStructure);

    /* Enable timer clock */
    RCC_APB1PeriphClockCmd(RCC_APB1PERIPH_TIM3, ENABLE);

    /* PWM frequency = 20kHz */
    TMR_TimeBaseStructInit(&TMR_TimeBaseStructure);
    TMR_TimeBaseStructure.TMR_Period = SystemCoreClock / PWM_FREQ - 1;
    TMR_TimeBaseStructure.TMR_DIV = 0;
    TMR_TimeBaseStructure.TMR_ClockDivision = TMR_CDIV_DIV1;
    TMR_TimeBaseStructure.TMR_CounterMode = TMR_CounterDIR_Up;
    TMR_TimeBaseInit(TIM3, &TMR_TimeBaseStructure);

    /* Configure PWM output */
    TMR_OCStructInit(&TMR_OCInitStructure);
    TMR_OCInitStructure.TMR_OCMode = TMR_OCMode_PWM1;
    TMR_OCInitStructure.TMR_OutputState = TMR_OutputState_Enable;
    TMR_OCInitStructure.TMR_Pulse = (TMR_TimeBaseStructure.TMR_Period + 1) * PWM_DUTY / 100;
    TMR_OCInitStructure.TMR_OCPolarity = TMR_OCPolarity_High;
    TMR_OC1Init(TIM3, &TMR_OCInitStructure);

    /* Enable timer */
    TMR_Cmd(TIM3, ENABLE);
}

int main(void)
{
    PWM_Configuration();

    while (1) {
        // do something
    }
}

该示例使用了TIM3的CH1通道来输出PWM信号，通过调整`PWM_FREQ`和`PWM_DUTY`可以改变PWM信号的频率和占空比。具体的电机驱动方式需要根据具体的无刷电机控制器来实现。