STM32 控制 SMC 小型电磁比例阀并解决迟滞问题 - 代码示例

"#include "stm32f10x.h"\n\n#define PWM_FREQUENCY 1000 // PWM频率\n#define DUTY_CYCLE 50 // 占空比（0-100）\n\nvoid TIM2_PWM_Init(void)\n{\n TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;\n TIM_OCInitTypeDef TIM_OCInitStructure;\n GPIO_InitTypeDef GPIO_InitStructure;\n\n // 使能TIM2和GPIOA的时钟\n RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2, ENABLE);\n RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE);\n\n // 配置GPIOA的引脚为复用推挽输出\n GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0;\n GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;\n GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;\n GPIO_Init(GPIOA, &GPIO_InitStructure);\n\n // 配置TIM2的基本参数\n TIM_TimeBaseStructure.TIM_Period = 1000 / PWM_FREQUENCY - 1;\n TIM_TimeBaseStructure.TIM_Prescaler = (72000000 / PWM_FREQUENCY) / (1000) - 1;\n TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;\n TIM_TimeBaseInit(TIM2, &TIM_TimeBaseStructure);\n\n // 配置TIM2的PWM参数\n TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1;\n TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;\n TIM_OCInitStructure.TIM_Pulse = (TIM_TimeBaseStructure.TIM_Period + 1) * DUTY_CYCLE / 100 - 1;\n TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High;\n TIM_OC1Init(TIM2, &TIM_OCInitStructure);\n\n // 使能TIM2的PWM输出\n TIM_CtrlPWMOutputs(TIM2, ENABLE);\n\n // 启动TIM2\n TIM_Cmd(TIM2, ENABLE);\n}\n\nint main(void)\n{\n TIM2_PWM_Init();\n\n while (1)\n {\n // 在这里可以根据需要调整PWM的占空比\n TIM2->CCR1 = (TIM2->ARR + 1) * DUTY_CYCLE / 100 - 1;\n }\n}\n"上述代码中，使用TIM2的PWM功能控制GPIOA的引脚输出PWM信号。通过调整DUTY_CYCLE的值来改变PWM的占空比，从而改变SMC小型电磁比例阀的开关状态。在main()函数的while(1)循环中，可以根据需要动态调整PWM的占空比。"