stm32 TIM定时器[操作寄存器+库函数]（6） 寄存器, 定时器

yuyang911220

main.c

001	#include "stm32f10x.h"

002

003	vu16 CCR1_Val = 40000;

004	vu16 CCR2_Val = 20000;

005	vu16 CCR3_Val = 10000;

006	vu16 CCR4_Val = 5000;

007

008	void RCC_Configuration(void);

009	void GPIO_Configuration(void);

010	void NVIC_Configuration(void);

011	void TIM_Configuration(void);

012

013	int main(void)

014

{

015

016	RCC_Configuration();

017	GPIO_Configuration();

018	NVIC_Configuration();

019	TIM_Configuration();

020

while(1);

021

}

022

023	void TIM_Configuration(void)

024

{

025	TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;

026	TIM_OCInitTypeDef TIM_OCInitStructure;

027	TIM_TimeBaseStructure.TIM_Period = 65535;

028	TIM_TimeBaseStructure.TIM_Prescaler = 7199;

029	TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;

030	TIM_TimeBaseInit(TIM2,&TIM_TimeBaseStructure);

031

032	//TIM_PrescalerConfig(TIM2,7199,TIM_PSCReloadMode_Immediate);

033

034	TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_Timing;

035	TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High;

036	TIM_OCInitStructure.TIM_Pulse = CCR1_Val;

037	TIM_OC1Init(TIM2,&TIM_OCInitStructure);

038	TIM_OCInitStructure.TIM_Pulse = CCR2_Val;

039	TIM_OC2Init(TIM2,&TIM_OCInitStructure);

040	TIM_OCInitStructure.TIM_Pulse = CCR3_Val;

041	TIM_OC3Init(TIM2,&TIM_OCInitStructure);

042	TIM_OCInitStructure.TIM_Pulse = CCR4_Val;

043	TIM_OC4Init(TIM2,&TIM_OCInitStructure);

044

045	TIM_OC1PreloadConfig(TIM2,TIM_OCPreload_Disable);

046	TIM_OC2PreloadConfig(TIM2,TIM_OCPreload_Disable);

047	TIM_OC3PreloadConfig(TIM2,TIM_OCPreload_Disable);

048	TIM_OC4PreloadConfig(TIM2,TIM_OCPreload_Disable);

049

050	TIM_ITConfig(TIM2,TIM_IT_CC1|TIM_IT_CC2|TIM_IT_CC3|TIM_IT_CC4,ENABLE);

051

052	TIM_Cmd(TIM2,ENABLE);

053

054

}

055

056	void NVIC_Configuration(void)

057

{

058	NVIC_InitTypeDef NVIC_InitStructure;

059

060	#ifdef  VECT_TAB_RAM

061	NVIC_SetVectorTable(NVIC_VectTab_RAM,0x0);

062

#else

063	NVIC_SetVectorTable(NVIC_VectTab_FLASH,0x0);

064

#endif

065

066	NVIC_PriorityGroupConfig(NVIC_PriorityGroup_0);

067	NVIC_InitStructure.NVIC_IRQChannel = TIM2_IRQn;

068	NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;

069	NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;

070	NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;

071	NVIC_Init(&NVIC_InitStructure);

072

073

}

074

075

076	void GPIO_Configuration(void)

077

{

078	GPIO_InitTypeDef GPIO_InitStructure;

079

080	GPIO_InitStructure.GPIO_Pin = GPIO_Pin_4 | GPIO_Pin_5 | GPIO_Pin_6 | GPIO_Pin_7;

081	GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;

082	GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;

083	GPIO_Init(GPIOA , &GPIO_InitStructure);

084

}

085

086

087	void RCC_Configuration(void)

088

{

089	/* 定义枚举类型变量 HSEStartUpStatus */

090	ErrorStatus HSEStartUpStatus;

091

092	/* 复位系统时钟设置*/

093	RCC_DeInit();

094	/* 开启HSE*/

095	RCC_HSEConfig(RCC_HSE_ON);

096	/* 等待HSE起振并稳定*/

097	HSEStartUpStatus = RCC_WaitForHSEStartUp();

098	/* 判断HSE起是否振成功，是则进入if()内部 */

099	if(HSEStartUpStatus == SUCCESS)

100

{

101	/* 选择HCLK（AHB）时钟源为SYSCLK 1分频 */

102	RCC_HCLKConfig(RCC_SYSCLK_Div1);

103	/* 选择PCLK2时钟源为 HCLK（AHB） 1分频 */

104	RCC_PCLK2Config(RCC_HCLK_Div1);

105	/* 选择PCLK1时钟源为 HCLK（AHB） 2分频 */

106	RCC_PCLK1Config(RCC_HCLK_Div2);

107	/* 设置FLASH延时周期数为2 */

108	FLASH_SetLatency(FLASH_Latency_2);

109	/* 使能FLASH预取缓存 */

110	FLASH_PrefetchBufferCmd(FLASH_PrefetchBuffer_Enable);

111	/* 选择锁相环（PLL）时钟源为HSE 1分频，倍频数为9，则PLL输出频率为 8MHz * 9 = 72MHz */

112	RCC_PLLConfig(RCC_PLLSource_HSE_Div1, RCC_PLLMul_9);

113	/* 使能PLL */

114	RCC_PLLCmd(ENABLE);

115	/* 等待PLL输出稳定 */

116	while(RCC_GetFlagStatus(RCC_FLAG_PLLRDY) == RESET);

117	/* 选择SYSCLK时钟源为PLL */

118	RCC_SYSCLKConfig(RCC_SYSCLKSource_PLLCLK);

119	/* 等待PLL成为SYSCLK时钟源 */

120	while(RCC_GetSYSCLKSource() != 0x08);

121

}

122	/* 打开APB2总线上的GPIOA时钟*/

123	RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA , ENABLE);

124

125	RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2 , ENABLE);

126

127

}