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84 lines
2.2 KiB
84 lines
2.2 KiB
#include "tim3.h" |
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#include "usart1.h" |
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#include <stdio.h> |
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extern Cmd_States Uart1_Cmd_State; |
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uint32_t g_tim3_count = 0; |
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extern uint32_t uart1_recv_time; |
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/** |
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* @brief Configures the different system clocks. |
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*/ |
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void TIM3_RCC_Configuration(void) |
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{ |
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/* TIM3 clock enable */ |
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RCC_EnableAPB1PeriphClk(RCC_APB1_PERIPH_TIM3, ENABLE); |
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} |
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/** |
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* @brief Configures tim3 clocks. |
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*/ |
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void TIM3_TIM_Configuration(void) |
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{ |
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TIM_TimeBaseInitType TIM_TimeBaseStructure; |
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/* Compute the prescaler value */ |
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/* Time base configuration */ |
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TIM_TimeBaseStructure.Period = 9; // 计数到9触发中断，即1ms |
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TIM_TimeBaseStructure.Prescaler = 7199; // 10K |
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TIM_TimeBaseStructure.ClkDiv = 0; |
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TIM_TimeBaseStructure.CntMode = TIM_CNT_MODE_UP; |
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TIM_InitTimeBase(TIM3, &TIM_TimeBaseStructure); |
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/* Prescaler configuration */ |
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//TIM_ConfigPrescaler(TIM3, PrescalerValue, TIM_PSC_RELOAD_MODE_IMMEDIATE); |
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/* TIM3 enable update irq */ |
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TIM_ConfigInt(TIM3, TIM_INT_UPDATE, ENABLE); |
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/* TIM3 enable counter */ |
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TIM_Enable(TIM3, ENABLE); |
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} |
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/** |
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* @brief Configure the nested vectored interrupt controller. |
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*/ |
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void TIM3_NVIC_Configuration(void) |
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{ |
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NVIC_InitType NVIC_InitStructure; |
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/* Enable the TIM3 global Interrupt */ |
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NVIC_InitStructure.NVIC_IRQChannel = TIM3_IRQn; |
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NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 3; // 抢占式中断优先级 0-3，最低 |
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NVIC_InitStructure.NVIC_IRQChannelSubPriority = 3; // 子中断优先级 0-3，最低 |
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NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; |
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NVIC_Init(&NVIC_InitStructure); |
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} |
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/** |
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* @brief This function handles TIM3 global interrupt request. |
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*/ |
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void TIM3_IRQHandler(void) |
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{ |
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if (TIM_GetIntStatus(TIM3, TIM_INT_UPDATE) != RESET) |
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{ |
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TIM_ClrIntPendingBit(TIM3, TIM_INT_UPDATE); |
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//GPIOA->POD ^= GPIO_PIN_15; |
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g_tim3_count++; |
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if(g_tim3_count > uart1_recv_time) { |
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Uart1_Cmd_State = kCmd_Head1; // 将命令处理标志复位 |
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} |
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//if(g_tim3_count % 1000 == 0) { |
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// printf("tim3 count %d 0x%08x\r\n", g_tim3_count, SCB->VTOR); |
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//} |
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} |
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} |
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void TIM3_Init(void) |
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{ |
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TIM3_RCC_Configuration(); |
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TIM3_TIM_Configuration(); |
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TIM3_NVIC_Configuration(); |
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}
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