stm32f103zet6和TB6600驱动57步进电机测试时电机不转

新人求助，我用精英的STM32f103zet6+TB6600驱动57步进电机，供电是用2个9v电池加上XL6009升压到24V,共阳极接法，测试时电机不转，但是关闭单片机电源时电机会动一下。main.c
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#include "stm32f10x.h"#include "delay.h"#include "mypwm.h"int main(void){   delay_init();       MyPWM_Init(299,359);while(1){ tiM_SetCompare3(TIM2,150);     }}
mypwm.c
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#include "mypwm.h"#include "sys.h"void MyPWM_Init(u16 arr,u16 psc){GPIO_InitTypeDef GPIO_PWM;TIM_TimeBaseInitTypeDef TIM_InitPWM;TIM_OCInitTypeDef TIM_OCInitPWM;RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2,ENABLE);    RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB,ENABLE);RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO,ENABLE);GPIO_PinRemapConfig(GPIO_FullRemap_TIM2,ENABLE);GPIO_PWM.GPIO_Mode=GPIO_Mode_AF_PP;GPIO_PWM.GPIO_Pin=GPIO_Pin_10;GPIO_PWM.GPIO_Speed=GPIO_Speed_50MHz;GPIO_Init(GPIOB,&GPIO_PWM);TIM_InitPWM.TIM_Period=arr;TIM_InitPWM.TIM_Prescaler=psc;TIM_InitPWM.TIM_ClockDivision=0;TIM_InitPWM.TIM_CounterMode = TIM_CounterMode_Up;TIM_TimeBaseInit(TIM2,&TIM_InitPWM);    TIM_OCInitPWM.TIM_OCMode=TIM_OCMode_PWM2;TIM_OCInitPWM.TIM_OCPolarity=TIM_OCPolarity_Low;//TIM_OCInitPWM.TIM_Pulse=0;TIM_OCInitPWM.TIM_OutputState = TIM_OutputState_Enable;TIM_OC3Init(TIM2,&TIM_OCInitPWM);TIM_OC3PreloadConfig(TIM2,TIM_OCPreload_Enable);TIM_Cmd(TIM2,ENABLE);}