我的ARM編程技巧---積累

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**************系統時(shí)鐘的配置RCC_Configuration**********************
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void RCC_Configuration(void)
{

RCC_DeInit();

RCC_HSEConfig(RCC_HSE_ON);

HSEStartUpStatus = RCC_WaitForHSEStartUp();
if(HSEStartUpStatus == SUCCESS)
{

RCC_HCLKConfig(RCC_SYSCLK_Div1);

RCC_PCLK2Config(RCC_HCLK_Div1);

RCC_PCLK1Config(RCC_HCLK_Div2);

FLASH_SetLatency(FLASH_Latency_2);

FLASH_PrefetchBufferCmd(FLASH_PrefetchBuffer_Enable);
*/
RCC_PLLConfig(RCC_PLLSource_HSE_Div1, RCC_PLLMul_9);

RCC_PLLCmd(ENABLE);

while(RCC_GetFlagStatus(RCC_FLAG_PLLRDY) == RESET)
{
}

RCC_SYSCLKConfig(RCC_SYSCLKSource_PLLCLK);

while(RCC_GetSYSCLKSource() != 0x08)
{
}
}
*****************//初始化獨立看門(mén)狗******************************
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void IWDG_Configuration(void)
{


//是能或者失能對寄存器IWDG_PR和IWDG_RLR
IWDG_WriteAccessCmd(IWDG_WriteAccess_Enable);

//選定工作頻率
IWDG_SetPrescaler(IWDG_Prescaler_32);

//設置重裝載值
IWDG_SetReload(230);

//按照重裝載器的值重裝載IWDG計數器的值-----------此動(dòng)作相當于“喂狗”
IWDG_ReloadCounter();

//使能IWDG
IWDG_Enable();
}
/ *******************
/
TIM_DeInit(TIM1);//將外設TIMx寄存器重設為缺省值
//2、基礎設置

TIM1_TimeBaseStructure.TIM_Prescaler = 0x0; //預分頻,此值+1為分頻的除數得到計數周期；
TIM1_TimeBaseStructure.TIM_Period = 0xFFFF;//計數周期(即當計數值達到“計數值”時(shí)，剛好用時(shí)一個(gè)計數周期)
TIM1_TimeBaseStructure.TIM_ClockDivision = 0x0;//時(shí)鐘因子
TIM1_TimeBaseStructure.TIM_RepetitionCounter = 0x0;
TIM1_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up; //計數器模式
//TIM_CounterMode_Dowm向下計數
//TIM_CounterMode_CenterAligned1 中心對齊方式1
// TIM_CounterMode_CenterAligned2 中心對齊方式2
// TIM_CounterMode_CenterAligned3 中心對齊方式3

TIM_TimeBaseInit(TIM1,&TIM1_TimeBaseStructure);
// 3、輸出通道設置

TIM1_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM2;
//TIM_OCMode_Timing輸出比較時(shí)間模式(輸出引腳凍結無(wú)效)
//TIM_OCMode_Active 輸出比較主動(dòng)模式(匹配時(shí)設置輸出引腳為有效電平，當計數值為比較/捕獲寄存器值相同時(shí)，強制輸出為高平)TIM_OCMode_Inactive; 輸出比較非主動(dòng)模式 (匹配時(shí)設置輸出引腳為無(wú)效電平，當計數值為比較/捕獲寄存器值相同時(shí)，強制輸出為低電平)
//TIM_OCMode_Toggle 輸出比較觸發(fā)模式(翻轉。當計數值與比較/捕獲寄存器值相同時(shí)，翻轉輸出引腳的電平)
//TIM_OCMode_PWM1向上計數時(shí)，當TIMx_CNT < TIMx_CCR*時(shí)，輸出電平有效，否則為無(wú)效，
//向下計數時(shí)，當TIMx_CNT > TIMx_CCR*時(shí)，輸出電平無(wú)效，否則為有效
//TIM_OCMode_PWM2 ；與PWM1模式相反

TIM1_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
TIM1_OCInitStructure.TIM_OutputNState = TIM_OutputNState_Enable;
TIM1_OCInitStructure.TIM_Pulse = CCR1_Val;
TIM1_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_Low;
TIM1_OCInitStructure.TIM_OCNPolarity = TIM_OCNPolarity_Low;
TIM1_OCInitStructure.TIM_OCIdleState = TIM_OCIdleState_Set;
TIM1_OCInitStructure.TIM_OCNIdleState = TIM_OCIdleState_Reset;

TIM_OC1Init(TIM1,&TIM1_OCInitStructure);

TIM1_OCInitStructure.TIM_Pulse = CCR2_Val;
TIM_OC2Init(TIM1,&TIM1_OCInitStructure);

TIM1_OCInitStructure.TIM_Pulse = CCR3_Val;
TIM_OC3Init(TIM1,&TIM1_OCInitStructure);

TIM1_BDTRInitStructure.TIM_OSSRState = TIM_OSSRState_Enable;
TIM1_BDTRInitStructure.TIM_OSSIState = TIM_OSSIState_Enable;
TIM1_BDTRInitStructure.TIM_LOCKLevel = TIM_LOCKLevel_1;
TIM1_BDTRInitStructure.TIM_DeadTime = 0x75;
TIM1_BDTRInitStructure.TIM_Break = TIM_Break_Enable;
TIM1_BDTRInitStructure.TIM_BreakPolarity = TIM_BreakPolarity_High;
TIM1_BDTRInitStructure.TIM_AutomaticOutput = TIM_AutomaticOutput_Enable;

TIM_BDTRConfig(TIM1,&TIM1_BDTRInitStructure);

TIM_Cmd(TIM1,ENABLE);

TIM_CtrlPWMOutputs(TIM1,ENABLE);