183 lines
4.8 KiB
C
183 lines
4.8 KiB
C
/************************************************************************!
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* 技术讨论：QQ群 123763203
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* 官网 ：www.navota.com
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*
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* @file pit.c
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* @brief pit定时器函数库
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* @author Navota
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* @date 2018-3-1
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************************************************************************/
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#include "common.h"
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#include "pit.h"
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/*!
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* @brief 存放回调入口
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*
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*/
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PIT_CallbackType PIT_Callback[2] = {(PIT_CallbackType)NULL};
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void PIT_Ch0Isr(void);
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void PIT_Ch1Isr(void);
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/******************************************************************************
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* 定义PIT的接口函数
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*******************************************************************************/
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/*****************************************************************************//*!
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*
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* @brief 初始化PIT模块.
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*
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* @param[in] u8Channel_No 通道号
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* @param[in] pConfig 配置模块的结构体指针
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*
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* @return none
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*
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*****************************************************************************/
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void PIT_Init(uint8_t u8Channel_No, PIT_ConfigType *pConfig)
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{
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SIM->SCGC |= SIM_SCGC_PIT_MASK; /*!< 选通PIT模块门控时钟 */
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if (pConfig->bFreeze)
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{
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PIT_SetDebugFreeze();
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}
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if (pConfig->bModuleDis == 0)
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{
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PIT_Enable(); /*!< 标准PIT定时器的时钟使能 */
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}
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PIT_SetLoadVal(u8Channel_No, pConfig->u32LoadValue); //加载对应通道的定时器起始值
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if (pConfig->bInterruptEn)
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{
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if (u8Channel_No)
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{
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NVIC_EnableIRQ(PIT_CH1_IRQn); //开启对应通道IRQ中断
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}
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else
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{
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NVIC_EnableIRQ(PIT_CH0_IRQn);
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}
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PIT_ChannelEnableInt(u8Channel_No); //开启对应通道的中断请求
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}
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else
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{
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NVIC_DisableIRQ(PIT_CH0_IRQn); //禁止通道0的IRQ中断
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}
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if (pConfig->bChainMode)
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{
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PIT_ChannelEnableChain(u8Channel_No); //定时器链接到前一定时器
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}
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if (pConfig->bETMerEn)
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{
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PIT_ChannelEnable(u8Channel_No); //定时器通道使能
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}
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}
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/*****************************************************************************//*!
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*
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* @brief 装载定时器起始值到加载值寄存器中.
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*
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* @param[in] u8Channel_No 通道号
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* @param[in] u32loadvalue 所有加载的数值
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*
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* @return none
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*
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*****************************************************************************/
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void PIT_SetLoadVal(uint8_t u8Channel, uint32_t u32loadvalue)
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{
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PIT->CHANNEL[u8Channel].LDVAL = u32loadvalue;
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}
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/*****************************************************************************//*!
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*
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* @brief 设置PIT模块回调函数.
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*
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* @param[in] u8Channel_No 通道号.
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* @param[in] pfnCallback 指向回调函数.
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*
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* @return none
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*
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*****************************************************************************/
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void PIT_SetCallback(uint8_t u8Channel_No, PIT_CallbackType pfnCallback)
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{
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PIT_Callback[u8Channel_No] = pfnCallback;
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}
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/*****************************************************************************//*!
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*
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* @brief 复位PIT模块
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*
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* @param none
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*
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* @return none
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*
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*****************************************************************************/
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void PIT_DeInit(void)
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{
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NVIC_DisableIRQ(PIT_CH0_IRQn);
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NVIC_DisableIRQ(PIT_CH1_IRQn);
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PIT_SetLoadVal(0,0);
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PIT_SetLoadVal(1,0);
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PIT_ChannelDisable(0);
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PIT_ChannelDisable(1);
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PIT_ChannelDisableInt(0);
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PIT_ChannelDisableInt(1);
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PIT_ChannelDisableChain(0);
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PIT_ChannelDisableChain(1);
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PIT_ChannelClrFlags(0);
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PIT_ChannelClrFlags(1);
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PIT_SetDebugOn();
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PIT_Disable();
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SIM->SCGC &= ~SIM_SCGC_PIT_MASK;
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}
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/*****************************************************************************//*!
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*
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* @brief PIT0通道中断服务函数.
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*
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* @param none
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*
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* @return none
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*
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*****************************************************************************/
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void PIT_Ch0Isr(void)
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{
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PIT_ChannelClrFlags(0); //清除中断标志位
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if (PIT_Callback[0])
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{
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PIT_Callback[0]();
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}
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}
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/*****************************************************************************//*!
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*
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* @brief PIT0通道中断服务函数.
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*
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* @param none
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*
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* @return none
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*
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*****************************************************************************/
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void PIT_Ch1Isr(void)
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{
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PIT_ChannelClrFlags(1); //清除中断标志位
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if (PIT_Callback[1])
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{
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PIT_Callback[1]();
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}
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}
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