#include "stm32f10x.h"


/* RCC时钟配置 */
void RCC_config(void)
{ 
ErrorStatus HSEStartUpStatus;


/* RCC寄存器设置为默认配置 */
RCC_DeInit();
/* 打开外部高速时钟 */
RCC_HSEConfig(RCC_HSE_ON);
/* 等待外部高速时钟稳定 */
HSEStartUpStatus = RCC_WaitForHSEStartUp();
if(HSEStartUpStatus == SUCCESS) 
{ 
/* 设置HCLK = SYSCLK */
RCC_HCLKConfig(RCC_SYSCLK_Div1);
/* 设置PCLK2 = HCLK */
RCC_PCLK2Config(RCC_HCLK_Div1);
/* 设置PCLK1 = HCLK / 2 */
RCC_PCLK1Config(RCC_HCLK_Div2);
// /* 设置FLASH代码延时 */
// FLASH_SetLatency(FLASH_Latency_2);
// /* 使能预取址缓存 */
// FLASH_PrefetchBufferCmd(FLASH_PrefetchBuffer_Enable);
/* 设置PLL时钟源为HSE倍频9 72MHz */
RCC_PLLConfig(RCC_PLLSource_HSE_Div1, RCC_PLLMul_9);
/* 使能PLL */
RCC_PLLCmd(ENABLE);
/* 等待PLL稳定 */
while(RCC_GetFlagStatus(RCC_FLAG_PLLRDY) == RESET);
/* 设置PLL为系统时钟源 */
RCC_SYSCLKConfig(RCC_SYSCLKSource_PLLCLK);
/* 等待系统时钟源切换到PLL */
while(RCC_GetSYSCLKSource() != 0x08);
}
}


/* GPIO配置 */
void GPIO_config(void)
{
GPIO_InitTypeDef GPIO_InitStructure;

/* 使能GPIOA时钟 */
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA | RCC_APB2Periph_AFIO, ENABLE);
GPIO_PinRemapConfig(GPIO_PartialRemap_TIM1, ENABLE);

/* 将GPIOA时钟设置为默认参数 */
GPIO_DeInit(GPIOA);
/* 复用推挽输出 */
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
/* 第7、8引脚 */
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_7 | GPIO_Pin_8;
/* 输出频率50MHz */
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
/* 初始化GPIOA 7、8 */
GPIO_Init(GPIOA, &GPIO_InitStructure);
}


/* 定时器配置 */
void TIMER_config(void)
{
TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
TIM_OCInitTypeDef TIM_OCInitStructure;
TIM_BDTRInitTypeDef TIM_BDTRInitStructure;

/* 允许TIM1的时钟 */
RCC_APB2PeriphClockCmd(RCC_APB2Periph_TIM1, ENABLE);

/* 将定时器1寄存器设为初始值 */
TIM_DeInit(TIM1);

/* 设置定时器1由内部时钟 */
TIM_InternalClockConfig(TIM1);


/* 预分频值 */
TIM_TimeBaseStructure.TIM_Prescaler = 72 - 1;
/* 时钟分割 */
TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1;
/* 向上计数 */
TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
/* 自动重载值 */
TIM_TimeBaseStructure.TIM_Period = 1000 - 1;
/* 循环次数 */
TIM_TimeBaseStructure.TIM_RepetitionCounter = 0;
/* 初始化定时器1 */
TIM_TimeBaseInit(TIM1, &TIM_TimeBaseStructure);

/* PWM设置 */
TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1;
TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
TIM_OCInitStructure.TIM_OutputNState = TIM_OutputNState_Enable;
TIM_OCInitStructure.TIM_Pulse = 500;
TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High;
TIM_OCInitStructure.TIM_OCNPolarity = TIM_OCNPolarity_High;
TIM_OCInitStructure.TIM_OCIdleState = TIM_OCIdleState_Reset;
TIM_OCInitStructure.TIM_OCNIdleState = TIM_OCNIdleState_Reset;
TIM_OC1Init(TIM1, &TIM_OCInitStructure);


/* 设置死区 */
TIM_BDTRInitStructure.TIM_OSSRState = TIM_OSSRState_Enable;
TIM_BDTRInitStructure.TIM_OSSIState = TIM_OSSIState_Enable;
TIM_BDTRInitStructure.TIM_LOCKLevel = TIM_LOCKLevel_OFF;
TIM_BDTRInitStructure.TIM_DeadTime = 0xFF;
TIM_BDTRInitStructure.TIM_Break = TIM_Break_Disable;
TIM_BDTRInitStructure.TIM_BreakPolarity = TIM_BreakPolarity_High;
TIM_BDTRInitStructure.TIM_AutomaticOutput = TIM_AutomaticOutput_Enable;
TIM_BDTRConfig(TIM1, &TIM_BDTRInitStructure);


/* 开启定时器1 */
TIM_Cmd(TIM1, ENABLE);


/* PWM输出 */
TIM_CtrlPWMOutputs(TIM1, ENABLE);
}


/* 毫秒延时 */
void delay_ms(uint16_t time)
{    
uint16_t i = 0;


while(time--)
{
i = 12000;
while(i--);
}
}


int main(void)
{
/* 时钟配置 */
RCC_config();


/* GPIO配置 */
GPIO_config();


/* 定时器2配置 */
TIMER_config();

while(1)
{
delay_ms(1000);
}
}