56 lines
2.1 KiB
C
56 lines
2.1 KiB
C
#include "bsp_timer.h"
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#include "stm32f10x_tim.h"
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#include "stm32f10x_rcc.h"
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#include "misc.h"
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#include "stm32f10x.h"
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#define BSP_TIMER_USER_SYSTICK_TYPE (TIM2)
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#define BSP_TIMER_USER_SYSTICK_RCC (RCC_APB1Periph_TIM2)
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#define BSP_TIMER_USER_SYSTICK_IRQN (TIM2_IRQn)
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#define BSP_TINER_USER_SYSTICK_PRESCALER (72 - 1)
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#define BSP_TINER_USER_SYSTICK_PERIOD (1000u)
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static void bsp_timer_2_init(void)
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{
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TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
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NVIC_InitTypeDef NVIC_InitStructure;
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/* 1. 初始化时钟 */
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RCC_APB1PeriphClockCmd(BSP_TIMER_USER_SYSTICK_RCC, ENABLE);
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/* 2. 初始化定时器参数,设置自动重装值，分频系数，计数方式等 */
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TIM_TimeBaseStructure.TIM_Period = BSP_TINER_USER_SYSTICK_PERIOD;
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TIM_TimeBaseStructure.TIM_Prescaler =BSP_TINER_USER_SYSTICK_PRESCALER;
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TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1;
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TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
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TIM_TimeBaseInit(BSP_TIMER_USER_SYSTICK_TYPE, &TIM_TimeBaseStructure);
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/* 3. 设置 TIM3_DIER 允许更新中断 */
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TIM_ITConfig(BSP_TIMER_USER_SYSTICK_TYPE, TIM_IT_Update, ENABLE);
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/* 4. TIM3 中断优先级设置。 */
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NVIC_InitStructure.NVIC_IRQChannel = BSP_TIMER_USER_SYSTICK_IRQN; //TIM3 中断
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NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0; //先占优先级 0 级
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NVIC_InitStructure.NVIC_IRQChannelSubPriority = 3; //从优先级 3 级
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NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; //IRQ 通道被使能
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NVIC_Init(&NVIC_InitStructure); //初始化 NVIC 寄存器
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/* 5. 使能定时器2 */
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TIM_Cmd(BSP_TIMER_USER_SYSTICK_TYPE, ENABLE);
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}
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// /* 6. 编写中断服务函数 */
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// void bsp_timer_user_systick_isr_process(void) //TIM3 中断
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// {
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// if (TIM_GetITStatus(BSP_TIMER_USER_SYSTICK_TYPE, TIM_IT_Update) != RESET)
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// {
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// // 硬件置了1，需要软件来清0
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// TIM_ClearITPendingBit(BSP_TIMER_USER_SYSTICK_TYPE, TIM_IT_Update);
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// /* add your code here */
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// }
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// }
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void bsp_timer_init(void)
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{
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bsp_timer_2_init();
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}
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