stm32f103zet6舵机控制
时间: 2023-09-20 12:10:45 浏览: 229
stm32f103zet6是一款Cortex-M3内核的微控制器,可以通过PWM信号控制舵机。以下是一个简单的控制舵机的代码示例:
```c
#include "stm32f10x.h"
#define SERVO_PIN GPIO_Pin_0
#define SERVO_PORT GPIOA
void delay_us(uint32_t us) {
SysTick->LOAD = 72 * us;
SysTick->VAL = 0;
SysTick->CTRL = SysTick_CTRL_CLKSOURCE_Msk | SysTick_CTRL_ENABLE_Msk;
while (!(SysTick->CTRL & SysTick_CTRL_COUNTFLAG_Msk));
}
void servo_init(void) {
GPIO_InitTypeDef GPIO_InitStructure;
TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
TIM_OCInitTypeDef TIM_OCInitStructure;
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE);
RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2, ENABLE);
GPIO_InitStructure.GPIO_Pin = SERVO_PIN;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(SERVO_PORT, &GPIO_InitStructure);
TIM_TimeBaseStructure.TIM_Period = 20000 - 1;
TIM_TimeBaseStructure.TIM_Prescaler = 72 - 1;
TIM_TimeBaseStructure.TIM_ClockDivision = 0;
TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
TIM_TimeBaseInit(TIM2, &TIM_TimeBaseStructure);
TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1;
TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
TIM_OCInitStructure.TIM_Pulse = 1500;
TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High;
TIM_OC2Init(TIM2, &TIM_OCInitStructure);
TIM_Cmd(TIM2, ENABLE);
}
void servo_set_angle(uint8_t angle) {
uint16_t pulse_width = (angle * 10) + 500;
TIM2->CCR2 = pulse_width;
delay_us(1000);
}
int main(void) {
servo_init();
while (1) {
for (int i = 0; i <= 180; i++) {
servo_set_angle(i);
}
for (int i = 180; i >= 0; i--) {
servo_set_angle(i);
}
}
return 0;
}
```
在这个示例中,我们使用PA0引脚作为PWM输出,使用定时器TIM2来产生PWM信号。我们通过调整TIM2的CCR2寄存器的值来控制PWM脉冲的宽度,从而控制舵机的角度。在servo_set_angle函数中,我们将角度转换为对应的脉冲宽度,并将其设置到TIM2的CCR2寄存器中。
注意,这个示例中我们使用了SysTick定时器来延时1ms,如果你的应用中需要更高的精度,可以使用其他定时器或者外部RTC芯片来提高精度。
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