1104 lines
28 KiB
C
1104 lines
28 KiB
C
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/*************************************************************!
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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 ics.c
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* @brief 时钟模块（ICS)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 "ics.h"
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/* 复位后ICS和OSC模块寄存器的默认值 */
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#define ICS_C1_DEFAULT 0x04
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#define ICS_C2_DEFAULT 0x20
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#define ICS_C3_DEFAULT 0x54
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#define ICS_C4_DEFAULT 0x00
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#define ICS_S_DEFAULT 0x50
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#define OSC_CR_DEFAULT 0
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/*****************************************************************************//*!
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*
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* @ 概要 ICS的工作模式由当前的FEI模式切换为FEE模式，对选中的时钟源做1分频
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* OSC模块的输出时钟选择振荡器时钟源
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*
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* @ 参数【输入】 pConfig 指向ICS配置结构体
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*
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* @ 无返回
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*
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* @ 成功/失败的标准 ：无
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*****************************************************************************/
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void FEI_to_FEE(ICS_ConfigType *pConfig)
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{
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/*
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* 使能OSC模块
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*/
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OSC_Init(&pConfig->oscConfig); /*OSC模块初始化 */
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/*
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* 对外部参考时钟进行分频，可将外部时钟分频到31.25k~39.0625k之间
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*/
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ICS_SetClkDivider(pConfig->u32ClkFreq);
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/*将FLL的参考时钟选择为外部时钟*/
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ICS->C1 = ICS->C1 & ~ICS_C1_IREFS_MASK;
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/*等待FLL参考时钟变为外部时钟*/
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#if defined(IAR)
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asm(
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"nop \n"
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"nop \n"
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);
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#elif defined(__MWERKS__)
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asm{
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nop
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nop
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};
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#endif
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while(ICS->S & ICS_S_IREFST_MASK);
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/* 等待FLL时钟成为ICS输出时钟源*/
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while(!(ICS->S & ICS_S_LOCK_MASK));
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/*
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*现在FLL输出时钟变时钟频率等于FLL参考时钟分频结果乘以FLL的倍频系数
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* FLL的倍频系数请参考参考手册
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*/
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#if defined(CPU_NV32)
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/*对选中的ICS输出时钟源做1分频*/
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if(((ICS->C2 & ICS_C2_BDIV_MASK)>>5) == 1)
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{
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ICS->C2 = (ICS->C2 & ~(ICS_C2_BDIV_MASK)) | ICS_C2_BDIV(BDIV_ENCODE);
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}
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#else
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ICS->C2 = (ICS->C2 & ~(ICS_C2_BDIV_MASK)) | ICS_C2_BDIV(BDIV_ENCODE);
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#endif
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/*
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* 完成对选中的时钟源做1分频，系统/总线时钟时频率为设置的目标频率
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*/
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/*LOLS清0*/
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ICS->S |= ICS_S_LOLS_MASK;
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}
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/*****************************************************************************//*!
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*
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* @ 概要 ICS的工作模式由当前的FEI模式转变成FBI模式，对选中的ICS输出时钟源
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* 进行2分频
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*
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* @ 参数 pConfig 指向ICS配置结构体.
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*
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* @ 无返回
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*
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* @ 成功/失败的标准 ：无
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* @ 参看 ICS_ConfigType
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*****************************************************************************/
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void FEI_to_FBI(ICS_ConfigType *pConfig)
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{
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/*ICS输出时钟源选择内部参考时钟*/
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ICS->C1 = (ICS->C1 & ~(ICS_C1_CLKS_MASK)) | ICS_C1_CLKS(1);
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ICS->C2 = ICS->C2 & ~(ICS_C2_LP_MASK);
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/*等待内部时钟成为ICS输出时钟源*/
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#if defined(IAR)
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asm(
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"nop \n"
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"nop \n"
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);
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#elif defined(__MWERKS__)
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asm{
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nop
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nop
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};
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#endif
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while(((ICS->S & ICS_S_CLKST_MASK) >> ICS_S_CLKST_SHIFT) !=1);
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/*
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* 现在内部参考时钟为ICS输出时钟源
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*/
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#if defined(BUS_CLK_EQU_CORE_DIVIDE_BY_2)||defined(CPU_NV32)
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/*对选中的ICS输出时钟源做2分频*/
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if(((ICS->C2 & ICS_C2_BDIV_MASK)>>5) != 1)
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{
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ICS->C2 = (ICS->C2 & ~(ICS_C2_BDIV_MASK)) | ICS_C2_BDIV(BDIV_ENCODE);
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}
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#else
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ICS->C2 = (ICS->C2 & ~(ICS_C2_BDIV_MASK));
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#endif
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/*LOLS清零*/
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ICS->S |= ICS_S_LOLS_MASK;
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}
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/*****************************************************************************//*!
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*
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* @ 概要 ICS的工作模式由当前的FEI模式转换成FBE模式，对选中的ICS输出时钟源做2分频
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* OSC模块的输出时钟选择振荡器时钟源
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*
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* @ 参数 pConfig 指向ICS的配置结构体 .
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*
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* @ 无返回
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*
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* @ 成功/失败的标准 ：无
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* @ 参看 ICS_ConfigType
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*****************************************************************************/
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void FEI_to_FBE(ICS_ConfigType *pConfig)
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{
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OSC_Init(&pConfig->oscConfig); /*初始化OSC 模块 */
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/*设置FLL的参考时钟为外部时钟*/
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ICS->C1 = ICS->C1 & ~(ICS_C1_IREFS_MASK);
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ICS->C1 = (ICS->C1 & ~(ICS_C1_CLKS_MASK)) | ICS_C1_CLKS(2);
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ICS->C2 = ICS->C2 & ~(ICS_C2_LP_MASK);
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/*等在参考时钟发生改变*/
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#if defined(IAR)
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asm(
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"nop \n"
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"nop \n"
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);
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#elif defined(__MWERKS__)
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asm{
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nop
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nop
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};
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#endif
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while(((ICS->S & ICS_S_CLKST_MASK) >> ICS_S_CLKST_SHIFT) !=2); /*外部时钟成为ICS时钟输出源*/
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while(ICS->S & ICS_S_IREFST_MASK); /*FLL参考时钟成为外部时钟*/
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/*
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* 现在外部时钟成为ICS输出时钟源
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*/
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#if defined(CPU_NV32)
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/*对选中的ICS输出时钟源做2分频*/
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if(((ICS->C2 & ICS_C2_BDIV_MASK)>>5) != 1)
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{
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ICS->C2 = (ICS->C2 & ~(ICS_C2_BDIV_MASK)) | ICS_C2_BDIV(BDIV_ENCODE);
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}
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#else
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ICS->C2 = (ICS->C2 & ~(ICS_C2_BDIV_MASK)) | ICS_C2_BDIV(BDIV_ENCODE);
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#endif
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/*
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* 现在ICS输出时钟频率为选中的输出时钟源的2分频
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*/
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/* LOLS清零 */
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ICS->S |= ICS_S_LOLS_MASK;
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}
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/*****************************************************************************//*!
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*
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|||
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* @ 概要 ICS的工作模式由当前的FEI模式转换成FBE模式，对选中的输出时钟源做2分频
|
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* OSC输出时钟选择EXTAL引脚的外部时钟源
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*
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* @ 参数 pConfig 指向配置结构体.
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|||
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*
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|||
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* @ 无返回
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|||
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*
|
|||
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* @ 成功/失败的标准 ：无
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* @ 参看 ICS_ConfigType
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*****************************************************************************/
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void FEI_to_FBE_OSC(ICS_ConfigType *pConfig)
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{
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OSC_Init(&pConfig->oscConfig); /* 初始化OSC */
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/*
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* 设置外部参考时钟的分频系数，将参考时钟的分频结果设定在FLL可以锁定的31.25k~39.0625k范围内，
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*/
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ICS_SetClkDivider(pConfig->u32ClkFreq);
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/*改变参考时钟源，将FLL的参考时钟设置为而外部时钟*/
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ICS->C1 = ICS->C1 & ~(ICS_C1_IREFS_MASK);/*将FLL的参考时钟设置为而外部时钟*/
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ICS->C1 = (ICS->C1 & ~(ICS_C1_CLKS_MASK)) | ICS_C1_CLKS(2); /*输出时钟源选择外部时钟*/
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ICS->C2 = ICS->C2 & ~(ICS_C2_LP_MASK);
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/* 等待参考时钟发生改变*/
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#if defined(IAR)
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asm(
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"nop \n"
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"nop \n"
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);
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#elif defined(__MWERKS__)
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asm{
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nop
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nop
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};
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#endif
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while(((ICS->S & ICS_S_CLKST_MASK) >> ICS_S_CLKST_SHIFT) !=2);/*外部时钟成为ICS时钟输出时钟源*/
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while(ICS->S & ICS_S_IREFST_MASK); /*外部时钟成为FLL参考时钟*/
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/*
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* 现在外部时钟成为FLL参考时钟和ICS输出时钟源
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*/
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#if defined(CPU_NV32)
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/*对选中的ICS输出时钟源做2分频*/
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if(((ICS->C2 & ICS_C2_BDIV_MASK)>>5) != 1)
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{
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ICS->C2 = (ICS->C2 & ~(ICS_C2_BDIV_MASK)) | ICS_C2_BDIV(BDIV_ENCODE);
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}
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#else
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ICS->C2 = (ICS->C2 & ~(ICS_C2_BDIV_MASK)) | ICS_C2_BDIV(BDIV_ENCODE);
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#endif
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/*
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* 现在ICS的输出时钟频率，为外部参考时钟的2分频
|
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*/
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/*LOLS 清零*/
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ICS->S |= ICS_S_LOLS_MASK;
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}
|
|||
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|||
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/*****************************************************************************//*!
|
|||
|
|
*
|
|||
|
|
* @ 概要 ICS的工作模式由当前的FEI模式转换FEE模式，对选中的ICS输出时钟源做2分频
|
|||
|
|
* OSC输出时钟选择EXTAL引脚的外部时钟源
|
|||
|
|
*
|
|||
|
|
* @ 参数 pConfig 指向配置结构体
|
|||
|
|
*
|
|||
|
|
* @ 无返回
|
|||
|
|
*
|
|||
|
|
* @ 成功/失败的标准 ：无
|
|||
|
|
* @ 参看 ICS_ConfigType
|
|||
|
|
*****************************************************************************/
|
|||
|
|
|
|||
|
|
void FEI_to_FEE_OSC(ICS_ConfigType *pConfig)
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|||
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{
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|||
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|
|||
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OSC_Init(&pConfig->oscConfig); /* 初始化OSC */
|
|||
|
|
|
|||
|
|
/*
|
|||
|
|
* 设置外部参考时钟的分频系数，将参考时钟的分频结果设定在FLL可以锁定的31.25k~39.0625k范围内
|
|||
|
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*/
|
|||
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ICS_SetClkDivider(pConfig->u32ClkFreq);
|
|||
|
|
|
|||
|
|
/* 将FLL的参考时钟设置为外部时钟 */
|
|||
|
|
|
|||
|
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ICS->C1 = ICS->C1 & ~(ICS_C1_IREFS_MASK);
|
|||
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|
|
|||
|
|
/*等待参考时钟变化*/
|
|||
|
|
#if defined(IAR)
|
|||
|
|
asm(
|
|||
|
|
"nop \n"
|
|||
|
|
"nop \n"
|
|||
|
|
);
|
|||
|
|
#elif defined(__MWERKS__)
|
|||
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|
asm{
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nop
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|||
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nop
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|||
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};
|
|||
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#endif
|
|||
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while(ICS->S & ICS_S_IREFST_MASK); /*FLL参考时钟变为外部时钟*/
|
|||
|
|
|
|||
|
|
/*等待FLL成为ICS输出时钟源 */
|
|||
|
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while(!(ICS->S & ICS_S_LOCK_MASK));
|
|||
|
|
#if defined(CPU_NV32)
|
|||
|
|
/*对选中的时钟源做2分频*/
|
|||
|
|
if(((ICS->C2 & ICS_C2_BDIV_MASK)>>5) != 1)
|
|||
|
|
{
|
|||
|
|
ICS->C2 = (ICS->C2 & ~(ICS_C2_BDIV_MASK)) | ICS_C2_BDIV(BDIV_ENCODE);
|
|||
|
|
}
|
|||
|
|
#else
|
|||
|
|
ICS->C2 = (ICS->C2 & ~(ICS_C2_BDIV_MASK)) | ICS_C2_BDIV(BDIV_ENCODE);
|
|||
|
|
#endif
|
|||
|
|
/*
|
|||
|
|
* 现在ICS输出时钟频率，成为要设置的目标频率
|
|||
|
|
*/
|
|||
|
|
|
|||
|
|
/* LOLS清零 */
|
|||
|
|
ICS->S |= ICS_S_LOLS_MASK;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
/*****************************************************************************//*!
|
|||
|
|
*
|
|||
|
|
* @ 概要 将ICS的工作模式由当前的FEE模式转换成FEI模式.
|
|||
|
|
*
|
|||
|
|
* @ 参数 pConfig 指向配置结构体
|
|||
|
|
*
|
|||
|
|
* @ 无返回
|
|||
|
|
*
|
|||
|
|
* @ 成功/失败的标准 ：无
|
|||
|
|
* @ 参看 ICS_ConfigType
|
|||
|
|
*****************************************************************************/
|
|||
|
|
void FEE_to_FEI(ICS_ConfigType *pConfig)
|
|||
|
|
{
|
|||
|
|
/*选择内部时钟作为FLL的参考时钟*/
|
|||
|
|
ICS->C1 = ICS->C1 | (ICS_C1_IREFS_MASK);
|
|||
|
|
|
|||
|
|
/*等待参考时钟发生改变*/
|
|||
|
|
#if defined(IAR)
|
|||
|
|
asm(
|
|||
|
|
"nop \n"
|
|||
|
|
"nop \n"
|
|||
|
|
);
|
|||
|
|
#elif defined(__MWERKS__)
|
|||
|
|
asm{
|
|||
|
|
nop
|
|||
|
|
nop
|
|||
|
|
};
|
|||
|
|
#endif
|
|||
|
|
while(!(ICS->S & ICS_S_IREFST_MASK)); /*FLL参考时钟成为内部时钟*/
|
|||
|
|
|
|||
|
|
/*FLL时钟成为ICS输出时钟源 */
|
|||
|
|
while(!(ICS->S & ICS_S_LOCK_MASK));
|
|||
|
|
/*LOLS清零*/
|
|||
|
|
ICS->S |= ICS_S_LOLS_MASK;
|
|||
|
|
|
|||
|
|
/*
|
|||
|
|
* 现在FLL输出成为ICS输出时钟源
|
|||
|
|
*/
|
|||
|
|
#if defined(CPU_NV32)
|
|||
|
|
/*对选中的ICS输出时钟源做2分频*/
|
|||
|
|
if(((ICS->C2 & ICS_C2_BDIV_MASK)>>5) != 1)
|
|||
|
|
{
|
|||
|
|
ICS->C2 = (ICS->C2 & ~(ICS_C2_BDIV_MASK)) | ICS_C2_BDIV(BDIV_ENCODE);
|
|||
|
|
}
|
|||
|
|
#else
|
|||
|
|
ICS->C2 = (ICS->C2 & ~(ICS_C2_BDIV_MASK)) | ICS_C2_BDIV(BDIV_ENCODE);
|
|||
|
|
#endif
|
|||
|
|
/*
|
|||
|
|
* 现在系统/总线时钟大约为 16MHz
|
|||
|
|
*/
|
|||
|
|
ICS->C2 = (ICS->C2 & ~(ICS_C2_BDIV_MASK)) | ICS_C2_BDIV(BDIV_ENCODE);
|
|||
|
|
OSC_Disable(); /* 禁用 OSC模块 */
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
/*****************************************************************************//*!
|
|||
|
|
*
|
|||
|
|
* @ 概要 将ICS的工作模式由当前的FEE模式转换成FBI模式.
|
|||
|
|
*
|
|||
|
|
* @ 参数 pConfig 指向配置结构体
|
|||
|
|
*
|
|||
|
|
* @ 无返回
|
|||
|
|
*
|
|||
|
|
* @ 成功/失败的标准 ：无
|
|||
|
|
* @ 参看 ICS_ConfigType
|
|||
|
|
*****************************************************************************/
|
|||
|
|
void FEE_to_FBI(ICS_ConfigType *pConfig)
|
|||
|
|
{
|
|||
|
|
/*LOLS清零*/
|
|||
|
|
ICS->S |= ICS_S_LOLS_MASK;
|
|||
|
|
|
|||
|
|
/* 选择内部时钟作为ICS输出时钟源 */
|
|||
|
|
/* 选择内部时钟作为FLL参考时钟 */
|
|||
|
|
/* LP = 0 在bypass模式FLL不会被禁止*/
|
|||
|
|
|
|||
|
|
ICS->C1 = ICS->C1 | (ICS_C1_IREFS_MASK);
|
|||
|
|
ICS->C1 = (ICS->C1 & ~(ICS_C1_CLKS_MASK)) | ICS_C1_CLKS(1);
|
|||
|
|
ICS->C2 = ICS->C2 & ~(ICS_C2_LP_MASK);
|
|||
|
|
|
|||
|
|
/* 等待参考时钟发生改变 */
|
|||
|
|
#if defined(IAR)
|
|||
|
|
asm(
|
|||
|
|
"nop \n"
|
|||
|
|
"nop \n"
|
|||
|
|
);
|
|||
|
|
#elif defined(__MWERKS__)
|
|||
|
|
asm{
|
|||
|
|
nop
|
|||
|
|
nop
|
|||
|
|
};
|
|||
|
|
#endif
|
|||
|
|
while(!(ICS->S & ICS_S_IREFST_MASK)); /*FLL参考时钟成为内部时钟*/
|
|||
|
|
while(((ICS->S & ICS_S_CLKST_MASK) >> ICS_S_CLKST_SHIFT) !=1); /*内部时成为ICS输出时钟源*/
|
|||
|
|
|
|||
|
|
#if defined(BUS_CLK_EQU_CORE_DIVIDE_BY_2)||defined(CPU_NV32)
|
|||
|
|
/*对所选中的ICS输出时钟源做2分频*/
|
|||
|
|
if(((ICS->C2 & ICS_C2_BDIV_MASK)>>5) != 1)
|
|||
|
|
{
|
|||
|
|
ICS->C2 = (ICS->C2 & ~(ICS_C2_BDIV_MASK)) | ICS_C2_BDIV(BDIV_ENCODE);
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
#else
|
|||
|
|
ICS->C2 = (ICS->C2 & ~(ICS_C2_BDIV_MASK));
|
|||
|
|
|
|||
|
|
#endif
|
|||
|
|
OSC_Disable();
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
/*****************************************************************************//*!
|
|||
|
|
*
|
|||
|
|
* @ 概要 将ICS的工作模式由当前的FEE模式转变成FBE模式
|
|||
|
|
*
|
|||
|
|
* @ 参数 pConfig 指向配置结构体
|
|||
|
|
*
|
|||
|
|
* @ 无返回
|
|||
|
|
*
|
|||
|
|
* @ 成功/失败的标准 ：无
|
|||
|
|
* @ 参看 ICS_ConfigType
|
|||
|
|
*****************************************************************************/
|
|||
|
|
|
|||
|
|
void FEE_to_FBE(ICS_ConfigType *pConfig)
|
|||
|
|
{
|
|||
|
|
/*LOLS清零*/
|
|||
|
|
ICS->S |= ICS_S_LOLS_MASK;
|
|||
|
|
|
|||
|
|
|
|||
|
|
/* LP = 0 */
|
|||
|
|
/*选择外部时钟作为ICS输出时钟源*/
|
|||
|
|
/* LP = 0 在bypass模式FLL不会被禁止*/
|
|||
|
|
|
|||
|
|
ICS->C1 = (ICS->C1 & ~(ICS_C1_CLKS_MASK)) | ICS_C1_CLKS(2);
|
|||
|
|
ICS->C2 = ICS->C2 & ~(ICS_C2_LP_MASK);
|
|||
|
|
|
|||
|
|
/*等待输出时钟源发生改变*/
|
|||
|
|
#if defined(IAR)
|
|||
|
|
asm(
|
|||
|
|
"nop \n"
|
|||
|
|
"nop \n"
|
|||
|
|
);
|
|||
|
|
#elif defined(__MWERKS__)
|
|||
|
|
asm{
|
|||
|
|
nop
|
|||
|
|
nop
|
|||
|
|
};
|
|||
|
|
#endif
|
|||
|
|
while(((ICS->S & ICS_S_CLKST_MASK) >> ICS_S_CLKST_SHIFT) !=2);
|
|||
|
|
|
|||
|
|
/* 现在ICS输出时钟源选择外部时钟源
|
|||
|
|
* 注释: 确保外部时钟频率在20MHz以内
|
|||
|
|
*/
|
|||
|
|
#if defined(CPU_NV32)
|
|||
|
|
/*对选择的ICS输出时钟源做2分频*/
|
|||
|
|
if(((ICS->C2 & ICS_C2_BDIV_MASK)>>5) != 1)
|
|||
|
|
{
|
|||
|
|
ICS->C2 = (ICS->C2 & ~(ICS_C2_BDIV_MASK)) | ICS_C2_BDIV(BDIV_ENCODE);
|
|||
|
|
}
|
|||
|
|
#else
|
|||
|
|
ICS->C2 = (ICS->C2 & ~(ICS_C2_BDIV_MASK)) | ICS_C2_BDIV(BDIV_ENCODE);
|
|||
|
|
#endif
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
/*****************************************************************************//*!
|
|||
|
|
*
|
|||
|
|
* @ 概要 将ICS的工作模式由当前的FBI模式转换成FBE模式
|
|||
|
|
*
|
|||
|
|
* @ 参数 pConfig 指向配置结构体.
|
|||
|
|
*
|
|||
|
|
* @ 无返回
|
|||
|
|
*
|
|||
|
|
* @ 成功/失败的标准 ：无
|
|||
|
|
* @ 参看 ICS_ConfigType
|
|||
|
|
*****************************************************************************/
|
|||
|
|
void FBI_to_FBE(ICS_ConfigType *pConfig)
|
|||
|
|
{
|
|||
|
|
OSC_Init(&pConfig->oscConfig); /*初始化OSC*/
|
|||
|
|
|
|||
|
|
/* 选择外部时钟做为FLL的参考时钟 */
|
|||
|
|
/*选择外部时钟作为输出时钟源*/
|
|||
|
|
|
|||
|
|
ICS->C1 = ICS->C1 & ~(ICS_C1_IREFS_MASK);
|
|||
|
|
ICS->C1 = (ICS->C1 & ~(ICS_C1_CLKS_MASK)) | ICS_C1_CLKS(2);
|
|||
|
|
|
|||
|
|
|
|||
|
|
/* 等待输出时钟源发生改变 */
|
|||
|
|
|
|||
|
|
#if defined(IAR)
|
|||
|
|
asm(
|
|||
|
|
"nop \n"
|
|||
|
|
"nop \n"
|
|||
|
|
);
|
|||
|
|
#elif defined(__MWERKS__)
|
|||
|
|
asm{
|
|||
|
|
nop
|
|||
|
|
nop
|
|||
|
|
};
|
|||
|
|
#endif
|
|||
|
|
while(((ICS->S & ICS_S_CLKST_MASK) >> ICS_S_CLKST_SHIFT) !=2); /*外部时钟成为ICS输出时钟源*/
|
|||
|
|
while((ICS->S & ICS_S_IREFST_MASK));/*外部时钟成为FLL的参考时钟*/
|
|||
|
|
|
|||
|
|
/* 现在系统时钟源是外部参考时钟
|
|||
|
|
* 注释:确保外部时钟源的频率在20MHz内
|
|||
|
|
*/
|
|||
|
|
#if defined(CPU_NV32)
|
|||
|
|
/*对选中的时钟源做2分频*/
|
|||
|
|
if(((ICS->C2 & ICS_C2_BDIV_MASK)>>5) != 1)
|
|||
|
|
{
|
|||
|
|
ICS->C2 = (ICS->C2 & ~(ICS_C2_BDIV_MASK)) | ICS_C2_BDIV(BDIV_ENCODE);
|
|||
|
|
}
|
|||
|
|
#else
|
|||
|
|
ICS->C2 = (ICS->C2 & ~(ICS_C2_BDIV_MASK)) | ICS_C2_BDIV(BDIV_ENCODE);
|
|||
|
|
#endif
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
/*****************************************************************************//**
|
|||
|
|
*
|
|||
|
|
* @ 概要 将ICS的工作模式由当前的FBI模式转换成FEE模式
|
|||
|
|
*
|
|||
|
|
* @ 参数 pConfig 指向配置结构体
|
|||
|
|
*
|
|||
|
|
* @ 无返回
|
|||
|
|
*
|
|||
|
|
* @ 成功/失败的标准 ：无
|
|||
|
|
* @ 参看 ICS_ConfigType
|
|||
|
|
*****************************************************************************/
|
|||
|
|
void FBI_to_FEE(ICS_ConfigType *pConfig)
|
|||
|
|
{
|
|||
|
|
OSC_Init(&pConfig->oscConfig); /*初始化OSC*/
|
|||
|
|
|
|||
|
|
/* 选择外部时钟作为FLL的参考时钟 */
|
|||
|
|
/* 选择FLL输出作为做为ICS输出时钟源*/
|
|||
|
|
|
|||
|
|
ICS->C1 = ICS->C1 & ~(ICS_C1_IREFS_MASK);
|
|||
|
|
ICS->C1 = (ICS->C1 & ~(ICS_C1_CLKS_MASK));
|
|||
|
|
|
|||
|
|
/*等待时钟源改变*/
|
|||
|
|
#if defined(IAR)
|
|||
|
|
asm(
|
|||
|
|
"nop \n"
|
|||
|
|
"nop \n"
|
|||
|
|
);
|
|||
|
|
#elif defined(__MWERKS__)
|
|||
|
|
asm{
|
|||
|
|
nop
|
|||
|
|
nop
|
|||
|
|
};
|
|||
|
|
#endif
|
|||
|
|
|
|||
|
|
while((ICS->S & ICS_S_CLKST_MASK)); /*FLL时钟成为ICS输出时钟源*/
|
|||
|
|
while((ICS->S & ICS_S_IREFST_MASK)); /*外部时钟成为FLL参考时钟*/
|
|||
|
|
|
|||
|
|
/* 现在系统时钟源为外部时钟
|
|||
|
|
* 注释: 确保外部时钟源的频率在20MHz内
|
|||
|
|
*/
|
|||
|
|
#if defined(CPU_NV32)
|
|||
|
|
/*对选中的时钟源做2分频*/
|
|||
|
|
if(((ICS->C2 & ICS_C2_BDIV_MASK)>>5) != 1)
|
|||
|
|
{
|
|||
|
|
ICS->C2 = (ICS->C2 & ~(ICS_C2_BDIV_MASK)) | ICS_C2_BDIV(BDIV_ENCODE);
|
|||
|
|
}
|
|||
|
|
#else
|
|||
|
|
ICS->C2 = (ICS->C2 & ~(ICS_C2_BDIV_MASK)) | ICS_C2_BDIV(BDIV_ENCODE);
|
|||
|
|
#endif
|
|||
|
|
/*LOLS清零*/
|
|||
|
|
ICS->S |= ICS_S_LOLS_MASK;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
/*****************************************************************************//*!
|
|||
|
|
*
|
|||
|
|
* @ 概要 将ICS的工作模式由当前的FBI模式转换成FBIP模式
|
|||
|
|
*
|
|||
|
|
* @ 参数 pConfig 输出指向配置结构体
|
|||
|
|
*
|
|||
|
|
* @ 无返回
|
|||
|
|
*
|
|||
|
|
* @ 成功/失败的标准 ：无
|
|||
|
|
* @ 警告 必须运行在调试接口没有没有接线的状态下
|
|||
|
|
* @ 参看 ICS_ConfigType
|
|||
|
|
*****************************************************************************/
|
|||
|
|
void FBI_to_FBILP(ICS_ConfigType *pConfig)
|
|||
|
|
{
|
|||
|
|
/*
|
|||
|
|
* 假设外部晶振时8MHz或者4MHz
|
|||
|
|
*/
|
|||
|
|
ICS->C2 |= ICS_C2_LP_MASK; /*进入低功耗模式 */
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
/*****************************************************************************//*!
|
|||
|
|
*
|
|||
|
|
* @ 概要 将ICS的工作模式由当前的FBI模式转变为FEI模式
|
|||
|
|
*
|
|||
|
|
* @ 参数 pConfig 指向配置结构体.
|
|||
|
|
*
|
|||
|
|
* @ 无返回
|
|||
|
|
*
|
|||
|
|
* @ 成功/失败的标准 ：无
|
|||
|
|
* @ 参看 ICS_ConfigType
|
|||
|
|
*****************************************************************************/
|
|||
|
|
void FBI_to_FEI(ICS_ConfigType *pConfig)
|
|||
|
|
{
|
|||
|
|
/* 选择内部时钟为FLL的参考时钟 */
|
|||
|
|
/*选择FLL输出作为ICS输出时钟源*/
|
|||
|
|
ICS->C1 = ICS->C1 | (ICS_C1_IREFS_MASK);
|
|||
|
|
ICS->C1 = (ICS->C1 & ~(ICS_C1_CLKS_MASK));
|
|||
|
|
|
|||
|
|
/*等待时钟源发生改变*/
|
|||
|
|
|
|||
|
|
#if defined(IAR)
|
|||
|
|
asm(
|
|||
|
|
"nop \n"
|
|||
|
|
"nop \n"
|
|||
|
|
);
|
|||
|
|
#elif defined(__MWERKS__)
|
|||
|
|
asm{
|
|||
|
|
nop
|
|||
|
|
nop
|
|||
|
|
};
|
|||
|
|
#endif
|
|||
|
|
while((ICS->S & ICS_S_CLKST_MASK)); /*FLL输出成为ICS输出时钟源*/
|
|||
|
|
while(!(ICS->S & ICS_S_IREFST_MASK)); /*FLL的参考时钟选择为外部时钟*/
|
|||
|
|
|
|||
|
|
|
|||
|
|
/*
|
|||
|
|
* 现在ICS输出时钟源为FLL输出
|
|||
|
|
*/
|
|||
|
|
#if defined(CPU_NV32)
|
|||
|
|
/*对选中的时钟源做2分频*/
|
|||
|
|
if(((ICS->C2 & ICS_C2_BDIV_MASK)>>5) != 1)
|
|||
|
|
{
|
|||
|
|
ICS->C2 = (ICS->C2 & ~(ICS_C2_BDIV_MASK)) | ICS_C2_BDIV(BDIV_ENCODE);
|
|||
|
|
}
|
|||
|
|
#else
|
|||
|
|
ICS->C2 = (ICS->C2 & ~(ICS_C2_BDIV_MASK)) | ICS_C2_BDIV(BDIV_ENCODE);
|
|||
|
|
#endif
|
|||
|
|
|
|||
|
|
/*LOLS清零 */
|
|||
|
|
ICS->S |= ICS_S_LOLS_MASK;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
/*****************************************************************************//*!
|
|||
|
|
*
|
|||
|
|
* @ 概要 将ICS的工作模式由当前的FBE模式转换成FBI模式
|
|||
|
|
*
|
|||
|
|
* @ 参数 pConfig 指向配置结构体
|
|||
|
|
*
|
|||
|
|
* @ 无返回
|
|||
|
|
*
|
|||
|
|
* @ 成功/失败的标准 ：无
|
|||
|
|
* @ 参看 ICS_ConfigType
|
|||
|
|
*****************************************************************************/
|
|||
|
|
void FBE_to_FBI(ICS_ConfigType *pConfig)
|
|||
|
|
{
|
|||
|
|
/*选择内部时钟作为FLL的参考时钟*/
|
|||
|
|
/*选择内部时钟作为ICS输出时钟源*/
|
|||
|
|
ICS->C1 = ICS->C1 | (ICS_C1_IREFS_MASK);
|
|||
|
|
ICS->C1 = (ICS->C1 & ~(ICS_C1_CLKS_MASK)) | ICS_C1_CLKS(1);
|
|||
|
|
|
|||
|
|
/*等待时钟源发生改变*/
|
|||
|
|
#if defined(IAR)
|
|||
|
|
asm(
|
|||
|
|
"nop \n"
|
|||
|
|
"nop \n"
|
|||
|
|
);
|
|||
|
|
#elif defined(__MWERKS__)
|
|||
|
|
asm{
|
|||
|
|
nop
|
|||
|
|
nop
|
|||
|
|
};
|
|||
|
|
#endif
|
|||
|
|
while(((ICS->S & ICS_S_CLKST_MASK) >> ICS_S_CLKST_SHIFT) != 1);/*内部时钟成为ICS输出时钟源*/
|
|||
|
|
while(!(ICS->S & ICS_S_IREFST_MASK)); /*内部时钟成为FLL的参考时钟*/
|
|||
|
|
|
|||
|
|
/*
|
|||
|
|
* 现在ICS输出时钟源为内部时钟
|
|||
|
|
*/
|
|||
|
|
|
|||
|
|
#if defined(CPU_NV32)
|
|||
|
|
/*对选中的时钟源做2分频*/
|
|||
|
|
if(((ICS->C2 & ICS_C2_BDIV_MASK)>>5) != 1)
|
|||
|
|
{
|
|||
|
|
ICS->C2 = (ICS->C2 & ~(ICS_C2_BDIV_MASK)) | ICS_C2_BDIV(BDIV_ENCODE);
|
|||
|
|
}
|
|||
|
|
#else
|
|||
|
|
ICS->C2 = (ICS->C2 & ~(ICS_C2_BDIV_MASK)) | ICS_C2_BDIV(BDIV_ENCODE);
|
|||
|
|
#endif
|
|||
|
|
|
|||
|
|
/*
|
|||
|
|
* 禁用OSC模块
|
|||
|
|
*/
|
|||
|
|
OSC_Disable();
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
|
|||
|
|
/*****************************************************************************//*!
|
|||
|
|
*
|
|||
|
|
* @ 概要 将ICS的工作模式由当前的FBE模式转换成FEE模式
|
|||
|
|
*
|
|||
|
|
* @ 参数 pConfig 指向配置结构体.
|
|||
|
|
*
|
|||
|
|
* @ 无返回
|
|||
|
|
*
|
|||
|
|
* @ 成功/失败的标准 ：无
|
|||
|
|
* @ 参看 ICS_ConfigType
|
|||
|
|
*****************************************************************************/
|
|||
|
|
void FBE_to_FEE(ICS_ConfigType *pConfig)
|
|||
|
|
{
|
|||
|
|
|
|||
|
|
/*选择FLL输出作为输出时钟源*/
|
|||
|
|
ICS->C1 = (ICS->C1 & ~(ICS_C1_CLKS_MASK));
|
|||
|
|
|
|||
|
|
/*等待ICS输出时钟源发生改变*/
|
|||
|
|
#if defined(IAR)
|
|||
|
|
asm(
|
|||
|
|
"nop \n"
|
|||
|
|
"nop \n"
|
|||
|
|
);
|
|||
|
|
#elif defined(__MWERKS__)
|
|||
|
|
asm{
|
|||
|
|
nop
|
|||
|
|
nop
|
|||
|
|
};
|
|||
|
|
#endif
|
|||
|
|
while(ICS->S & ICS_S_CLKST_MASK);
|
|||
|
|
|
|||
|
|
|
|||
|
|
/*
|
|||
|
|
* 现在ICS输出时钟源为FLL输出
|
|||
|
|
* 注释: 外部时钟频率 <= 20MHz
|
|||
|
|
*/
|
|||
|
|
#if defined(CPU_NV32)
|
|||
|
|
/*对选中的ICS输出时钟源做2分频*/
|
|||
|
|
if(((ICS->C2 & ICS_C2_BDIV_MASK)>>5) != 1)
|
|||
|
|
{
|
|||
|
|
ICS->C2 = (ICS->C2 & ~(ICS_C2_BDIV_MASK)) | ICS_C2_BDIV(BDIV_ENCODE);
|
|||
|
|
}
|
|||
|
|
#else
|
|||
|
|
ICS->C2 = (ICS->C2 & ~(ICS_C2_BDIV_MASK)) | ICS_C2_BDIV(BDIV_ENCODE);
|
|||
|
|
#endif
|
|||
|
|
/* LOLS清零 */
|
|||
|
|
ICS->S |= ICS_S_LOLS_MASK;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
|
|||
|
|
/*****************************************************************************//*!
|
|||
|
|
*
|
|||
|
|
* @ 概要 将ICS的工作模式由当前的FBE模式转变成FEI模式
|
|||
|
|
*
|
|||
|
|
* @ 参数 pConfig 指向配置结构体
|
|||
|
|
*
|
|||
|
|
* @ 无返回
|
|||
|
|
*
|
|||
|
|
* @ 成功/失败的标准 ：无
|
|||
|
|
* @ 参看 ICS_ConfigType
|
|||
|
|
*****************************************************************************/
|
|||
|
|
void FBE_to_FEI(ICS_ConfigType *pConfig)
|
|||
|
|
{
|
|||
|
|
/* 选择内部时钟作为FLL的参考时钟*/
|
|||
|
|
/*选择FLL输出做为ICS输出时钟源*/
|
|||
|
|
|
|||
|
|
ICS->C1 = ICS->C1 | (ICS_C1_IREFS_MASK);
|
|||
|
|
ICS->C1 = (ICS->C1 & ~(ICS_C1_CLKS_MASK));
|
|||
|
|
|
|||
|
|
/*等待时钟源改变*/
|
|||
|
|
#if defined(IAR)
|
|||
|
|
asm(
|
|||
|
|
"nop \n"
|
|||
|
|
"nop \n"
|
|||
|
|
);
|
|||
|
|
#elif defined(__MWERKS__)
|
|||
|
|
asm{
|
|||
|
|
nop
|
|||
|
|
nop
|
|||
|
|
};
|
|||
|
|
#endif
|
|||
|
|
while((ICS->S & ICS_S_CLKST_MASK)); /*FLL输出成为ICS输出时钟源*/
|
|||
|
|
while(!(ICS->S & ICS_S_IREFST_MASK)); /*内部时钟中成为FLL参考时钟*/
|
|||
|
|
|
|||
|
|
/*
|
|||
|
|
* 现在FLL输出成为ICS输出时钟源
|
|||
|
|
*/
|
|||
|
|
|
|||
|
|
#if defined(CPU_NV32)
|
|||
|
|
|
|||
|
|
/*对选中的时钟源做2分频*/
|
|||
|
|
if(((ICS->C2 & ICS_C2_BDIV_MASK)>>5) != 1)
|
|||
|
|
{
|
|||
|
|
ICS->C2 = (ICS->C2 & ~(ICS_C2_BDIV_MASK)) | ICS_C2_BDIV(BDIV_ENCODE);
|
|||
|
|
}
|
|||
|
|
#else
|
|||
|
|
ICS->C2 = (ICS->C2 & ~(ICS_C2_BDIV_MASK)) | ICS_C2_BDIV(BDIV_ENCODE);
|
|||
|
|
#endif
|
|||
|
|
/*LOLS清零*/
|
|||
|
|
ICS->S |= ICS_S_LOLS_MASK;
|
|||
|
|
|
|||
|
|
/*
|
|||
|
|
*禁用OSC模块
|
|||
|
|
*/
|
|||
|
|
OSC_Disable();
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
/*****************************************************************************//*!
|
|||
|
|
*
|
|||
|
|
* @ 概要 将ICS的工作模式由当前的FBE模式转变为FBELP模式
|
|||
|
|
*
|
|||
|
|
* @ 参数 pConfig 指向配置结构体.
|
|||
|
|
*
|
|||
|
|
* @ 无返回
|
|||
|
|
*
|
|||
|
|
* @ 成功/失败的标准 ：无
|
|||
|
|
* @ 参看 ICS_ConfigType
|
|||
|
|
*****************************************************************************/
|
|||
|
|
void FBE_to_FBELP(ICS_ConfigType *pConfig)
|
|||
|
|
{
|
|||
|
|
/* enter low power mode */
|
|||
|
|
/*进入低功耗模式*/
|
|||
|
|
ICS->C2 = ICS->C2 | (ICS_C2_LP_MASK);
|
|||
|
|
}
|
|||
|
|
/*****************************************************************************//*!
|
|||
|
|
*
|
|||
|
|
* @ 概要 将ICS的工作模式由当前的FBELP模式转换成FBE模式
|
|||
|
|
*
|
|||
|
|
* @ 参数 pConfig 指向配置结构体.
|
|||
|
|
*
|
|||
|
|
* @ 无返回
|
|||
|
|
*
|
|||
|
|
* @ 成功/失败的标准 ：无
|
|||
|
|
* @ 参看 ICS_ConfigType
|
|||
|
|
*****************************************************************************/
|
|||
|
|
void FBELP_to_FBE(ICS_ConfigType *pConfig)
|
|||
|
|
{
|
|||
|
|
/* enter low power mode */
|
|||
|
|
/*禁用低功耗模式*/
|
|||
|
|
ICS->C2 = ICS->C2 & ~(ICS_C2_LP_MASK);
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
/*****************************************************************************//*!
|
|||
|
|
*
|
|||
|
|
* @ 概要 将ICS的工作模式由当前的FBILP转换到FBI模式
|
|||
|
|
*
|
|||
|
|
* @ 参数 pConfig 指向配置结构体.
|
|||
|
|
*
|
|||
|
|
* @ 无返回
|
|||
|
|
*
|
|||
|
|
* @ 成功/失败的标准 ：无
|
|||
|
|
* @ 参看 ICS_ConfigType
|
|||
|
|
*****************************************************************************/
|
|||
|
|
void FBILP_to_FBI(ICS_ConfigType *pConfig)
|
|||
|
|
{
|
|||
|
|
/* enter low power mode */
|
|||
|
|
/*禁用低功耗模式*/
|
|||
|
|
ICS->C2 = ICS->C2 & ~(ICS_C2_LP_MASK);
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
/*****************************************************************************//*!
|
|||
|
|
*
|
|||
|
|
* @ 概要 调整内部内部时钟 (IRC).
|
|||
|
|
*
|
|||
|
|
* @ 参数 u16TrimValue 调整值
|
|||
|
|
*
|
|||
|
|
* @ 无返回
|
|||
|
|
*
|
|||
|
|
* @ 成功/失败的标准 ：无
|
|||
|
|
*****************************************************************************/
|
|||
|
|
|
|||
|
|
void ICS_Trim(uint16_t u16TrimValue)
|
|||
|
|
{
|
|||
|
|
ICS->C3 = (uint8_t) u16TrimValue; /*将调整值写入寄存器*/
|
|||
|
|
ICS->C4 = (ICS->C4 & ~(ICS_C4_SCFTRIM_MASK)) | ((u16TrimValue>>8) & 0x01);
|
|||
|
|
while(!(ICS->S & ICS_S_LOCK_MASK));
|
|||
|
|
}
|
|||
|
|
/*****************************************************************************//*!
|
|||
|
|
*
|
|||
|
|
* @ 概要 对外部参考时钟进行分频，使得分频结果在FLL可以锁定的31.25k~39.0625k内
|
|||
|
|
*
|
|||
|
|
* @ 参数 u32ClkFreqKHz 参考时钟频率.
|
|||
|
|
*
|
|||
|
|
* @ 无返回
|
|||
|
|
*
|
|||
|
|
* @ 成功/失败的标准 ：无
|
|||
|
|
*****************************************************************************/
|
|||
|
|
|
|||
|
|
void ICS_SetClkDivider(uint32_t u32ClkFreqKHz)
|
|||
|
|
{
|
|||
|
|
|
|||
|
|
switch(u32ClkFreqKHz)
|
|||
|
|
{
|
|||
|
|
case 8000L:
|
|||
|
|
case 10000L:
|
|||
|
|
/* 8MHz or 10MHz*/
|
|||
|
|
ICS->C1 = (ICS->C1 & ~(ICS_C1_RDIV_MASK)) | ICS_C1_RDIV(3); /*8MHz分频结果是 8000/256 = 31.25K */
|
|||
|
|
/*10MHz分频结果是 10000/256 = 39.0625K*/
|
|||
|
|
break;
|
|||
|
|
case 4000L:
|
|||
|
|
/* 4MHz */
|
|||
|
|
ICS->C1 = (ICS->C1 & ~(ICS_C1_RDIV_MASK)) | ICS_C1_RDIV(2);
|
|||
|
|
/*4MHz分频结果是 4000/128 = 31.25K*/
|
|||
|
|
break;
|
|||
|
|
case 16000L:
|
|||
|
|
/* 16MHz */
|
|||
|
|
ICS->C1 = (ICS->C1 & ~(ICS_C1_RDIV_MASK)) | ICS_C1_RDIV(4);
|
|||
|
|
/* 16MHz分频结果是 16000/512 = 31.25K */
|
|||
|
|
break;
|
|||
|
|
case 20000L:
|
|||
|
|
/* 20MHz */
|
|||
|
|
ICS->C1 = (ICS->C1 & ~(ICS_C1_RDIV_MASK)) | ICS_C1_RDIV(4);
|
|||
|
|
/*20MHz分频结果是 20000/512 = 39.0625K */
|
|||
|
|
break;
|
|||
|
|
case 32L:
|
|||
|
|
/* 32KHz */
|
|||
|
|
ICS->C1 &= ~(ICS_C1_RDIV_MASK);
|
|||
|
|
break;
|
|||
|
|
default:
|
|||
|
|
break;
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
/*****************************************************************************//*!
|
|||
|
|
*
|
|||
|
|
* @ 概要 初始化ICS模块根据定义所需要的总线时钟频率.
|
|||
|
|
*
|
|||
|
|
* @ 参数 pConfig 指向配置结构体.
|
|||
|
|
*
|
|||
|
|
* @ 无返回
|
|||
|
|
*
|
|||
|
|
* @ 成功/失败的标准 ：无
|
|||
|
|
* @ 参看 ICS_ConfigType
|
|||
|
|
*****************************************************************************/
|
|||
|
|
|
|||
|
|
|
|||
|
|
void ICS_Init(ICS_ConfigType *pConfig)
|
|||
|
|
{
|
|||
|
|
if(pConfig->u8ClkMode == ICS_CLK_MODE_FEE)
|
|||
|
|
{
|
|||
|
|
pConfig->oscConfig.bIsCryst = 1; /* OSC的输出选择选择振动器时钟源 */
|
|||
|
|
pConfig->oscConfig.bWaitInit = 1; /* 等待振荡器初始化化完成 */
|
|||
|
|
|
|||
|
|
/*选择FEE模式，OSC输出选择振荡器时钟源*/
|
|||
|
|
FEI_to_FEE(pConfig);
|
|||
|
|
}
|
|||
|
|
else if (pConfig->u8ClkMode == ICS_CLK_MODE_FEE_OSC)
|
|||
|
|
{
|
|||
|
|
pConfig->oscConfig.bIsCryst = 0; /*OSC输出时钟选择EEXTAL引脚的外部时钟源*/
|
|||
|
|
|
|||
|
|
/*选择FEE工作模式；OSC输出时钟选择EEXTAL引脚的外部时钟源*/
|
|||
|
|
FEI_to_FEE_OSC(pConfig);
|
|||
|
|
}
|
|||
|
|
else if (pConfig->u8ClkMode == ICS_CLK_MODE_FBE_OSC)
|
|||
|
|
{
|
|||
|
|
pConfig->oscConfig.bIsCryst = 0; /* is clock：OSC输出时钟选择EXTAL引脚的外部时钟源 */
|
|||
|
|
/* 选择FBE工作模式；OSC输出时钟选择EXTAL引脚的外部时钟源*/
|
|||
|
|
FEI_to_FBE_OSC(pConfig);
|
|||
|
|
}
|
|||
|
|
else if(pConfig->u8ClkMode == ICS_CLK_MODE_FBELP )
|
|||
|
|
{
|
|||
|
|
pConfig->oscConfig.bIsCryst = 1; /* OSC的输出时钟选择选择振动器时钟源 */
|
|||
|
|
pConfig->oscConfig.bWaitInit = 1; /*等待振荡器初始化化完成 */
|
|||
|
|
|
|||
|
|
/* 选择FBE模式，OSC的输出时钟选择选择振动器时钟源*/
|
|||
|
|
FEI_to_FBE(pConfig); /*先选择PBE模式*/
|
|||
|
|
FBE_to_FBELP(pConfig); /*选择FBELP*/
|
|||
|
|
ICS->C2 = (ICS->C2 & ~(ICS_C2_BDIV_MASK)) | ICS_C2_BDIV(BDIV_ENCODE);
|
|||
|
|
}
|
|||
|
|
else if(pConfig->u8ClkMode == ICS_CLK_MODE_FBILP )
|
|||
|
|
{
|
|||
|
|
|
|||
|
|
/* OSC输出时钟选择EXTAL引脚的外部时钟源*/
|
|||
|
|
pConfig->oscConfig.bIsCryst = 0;
|
|||
|
|
|
|||
|
|
/* 选择FBE模式，OSC输出时钟选择EXTAL引脚的外部时钟源*/
|
|||
|
|
FEI_to_FBI(pConfig);
|
|||
|
|
FBI_to_FBILP(pConfig);
|
|||
|
|
ICS->C2 = (ICS->C2 & ~(ICS_C2_BDIV_MASK)) | ICS_C2_BDIV(BDIV_ENCODE);
|
|||
|
|
}
|
|||
|
|
else
|
|||
|
|
{
|
|||
|
|
|
|||
|
|
/*ICS默认工作模式FEI模式*/
|
|||
|
|
#if defined(CPU_NV32)
|
|||
|
|
if(((ICS->C2 & ICS_C2_BDIV_MASK)>>5) == 1)
|
|||
|
|
{
|
|||
|
|
ICS->C2 = (ICS->C2 & ~(ICS_C2_BDIV_MASK)) | ICS_C2_BDIV(BDIV_ENCODE);
|
|||
|
|
}
|
|||
|
|
#else
|
|||
|
|
ICS->C2 = (ICS->C2 & ~(ICS_C2_BDIV_MASK)) | ICS_C2_BDIV(BDIV_ENCODE);
|
|||
|
|
#endif
|
|||
|
|
}
|
|||
|
|
ICS->C2 = (ICS->C2 & ~(ICS_C2_BDIV_MASK)) | ICS_C2_BDIV(BDIV_ENCODE);
|
|||
|
|
}
|
|||
|
|
/*****************************************************************************//*!
|
|||
|
|
*
|
|||
|
|
* @ 概要 对ICS模块各寄存器进行复位.
|
|||
|
|
*
|
|||
|
|
* @ 无参数
|
|||
|
|
*
|
|||
|
|
* @ 无返回
|
|||
|
|
*
|
|||
|
|
* @ 成功/失败的标准 ：无
|
|||
|
|
* @ 参看 ICS_Init
|
|||
|
|
*****************************************************************************/
|
|||
|
|
|
|||
|
|
void ICS_DeInit(void)
|
|||
|
|
{
|
|||
|
|
ICS->C1 = ICS_C1_DEFAULT;
|
|||
|
|
ICS->C2 = ICS_C2_DEFAULT;
|
|||
|
|
ICS->C3 = ICS_C3_DEFAULT;
|
|||
|
|
ICS->C4 = ICS_C4_DEFAULT;
|
|||
|
|
while(ICS->S != ICS_S_DEFAULT)
|
|||
|
|
;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
/*****************************************************************************//*!
|
|||
|
|
*
|
|||
|
|
* @ 概要 通过设定的参数初始化XOSC
|
|||
|
|
*
|
|||
|
|
* @ 参数 pConfig 指向osc配置结构体
|
|||
|
|
*
|
|||
|
|
* @ 无返回
|
|||
|
|
*
|
|||
|
|
* @ 成功/失败的标准 ：无
|
|||
|
|
*****************************************************************************/
|
|||
|
|
void OSC_Init(OSC_ConfigType *pConfig)
|
|||
|
|
{
|
|||
|
|
uint8 cr = 0;
|
|||
|
|
/*
|
|||
|
|
*
|
|||
|
|
*/
|
|||
|
|
if(pConfig->bGain) /*高增益振荡器选择*/
|
|||
|
|
{
|
|||
|
|
/* high gain：选择高增益模式 */
|
|||
|
|
cr |= OSC_CR_HGO_MASK ;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
if(pConfig->bRange) /*频率范围的选择*/
|
|||
|
|
{
|
|||
|
|
cr |= OSC_CR_RANGE_MASK; /*选择高频范围 */
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
if(pConfig->bStopEnable) /*停止模式下的OSC使能*/
|
|||
|
|
{
|
|||
|
|
cr |= OSC_CR_OSCSTEN_MASK; /*OSC在停止模式下保持使能*/
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
if(pConfig->bIsCryst) /*OSC输出选择*/
|
|||
|
|
{
|
|||
|
|
cr |= OSC_CR_OSCOS_MASK; /*选择振荡器时钟*/
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
if(pConfig->bEnable) /*OSC使能*/
|
|||
|
|
{
|
|||
|
|
cr |= OSC_CR_OSCEN_MASK;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
OSC->CR = cr; /*数值写入控制寄存器*/
|
|||
|
|
|
|||
|
|
if(pConfig->bWaitInit)
|
|||
|
|
{
|
|||
|
|
|
|||
|
|
/*
|
|||
|
|
*等待初始化完成
|
|||
|
|
*/
|
|||
|
|
while(!(OSC->CR & OSC_CR_OSCINIT_MASK));
|
|||
|
|
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
/*****************************************************************************//*!
|
|||
|
|
*
|
|||
|
|
* @ 概要 重置OSC模块，使其恢复到默认状态.
|
|||
|
|
*
|
|||
|
|
* @ 无输参数
|
|||
|
|
*
|
|||
|
|
* @ 无返回
|
|||
|
|
*
|
|||
|
|
* @ 成功/失败的标准 ：无
|
|||
|
|
* @ 参看 ICS_Init
|
|||
|
|
*****************************************************************************/
|
|||
|
|
|
|||
|
|
void OSC_DeInit(void)
|
|||
|
|
{
|
|||
|
|
OSC->CR = OSC_CR_DEFAULT;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
|