weixin_41102839的博客

#define TIM2_CLK_ENABLE() ( RCC->APB1ENR |= RCC_APB1ENR_TIM2EN ) #define TIM3_CLK_ENABLE() ( RCC->APB1ENR |= RCC_APB1ENR_TIM3EN ) #define TIMx_CHANNEL_GPIOA_PORT() ( RCC->IOPENR |= (RCC_IOPENR_GPIOAEN)) #define

#define SysTick_CTRL_TICKINT_Pos 1U #define SysTick_CTRL_TICKINT_Msk (1UL << SysTick_CTRL_TICKINT_Pos) #define DRV_SYS_TICK_USE_SYS_CLK (SysTick_CTRL_CLKSOURCE_Msk|SysTick_CTRL_ENABLE_Msk) 对系统时钟进行初始化： drv_sys_tick_init(DRV_SY