蓝桥杯国赛复习总结

• 常用PA１引脚功能表
  GPIO 功能
  PA1 TIM2_CH2 / SER(74LS595串行数据输入引脚) / 频率可调脉冲
  PA2 TIM2_CH3 / USART2_TX / RCK(74LS595串行存储时钟输入引脚) / 频率可调脉冲
  PA3 USART2_RX / SCK(74LS595串行移位时钟输入引脚) / 光敏电阻读入引脚
  PA4 ADC1_IN4 / SCL(三轴传感器时钟引脚)
  PA5 ADC1_IN5 / SDA(三轴传感器数据引脚) / 4*2按键矩阵
  PA6 TIM3_CH1 / 占空比可调脉冲 / 温度传感器
  PA7 TIM3_CH2 / 占空比可调脉冲 / 温湿度传感器

LED

• led.c

LED STM32
LED0 ~ 7 PC8 ~1 5
LE PD2

• 快速驱动

Project->STM32F10x_StdPeriph_Examples->GPIO->IOToggle"文件夹下，打开"main.c"

void LED_Init(void){ GPIO_InitTypeDef GPIO_InitStructure; RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOC|RCC_APB2Periph_GPIOD, ENABLE); GPIO_InitStructure.GPIO_Pin = GPIO_Pin_2; GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP; GPIO_Init(GPIOD, &GPIO_InitStructure); GPIO_InitStructure.GPIO_Pin = GPIO_Pin_8|GPIO_Pin_9|GPIO_Pin_10|GPIO_Pin_11|GPIO_Pin_12|GPIO_Pin_13|GPIO_Pin_14|GPIO_Pin_15; GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP; GPIO_Init(GPIOC, &GPIO_InitStructure); }void LED_Con(uint16_t LED,uint16_t Status) { if(Status==0) { GPIO_SetBits(GPIOC,LED); GPIO_SetBits(GPIOD,GPIO_Pin_2); GPIO_ResetBits(GPIOD,GPIO_Pin_2); } else { GPIO_ResetBits(GPIOC,LED); GPIO_SetBits(GPIOD,GPIO_Pin_2); GPIO_ResetBits(GPIOD,GPIO_Pin_2); }}

• led.h

#include "stm32f10x.h"#define LED0 GPIO_Pin_8 #define LED1 GPIO_Pin_9 #define LED2 GPIO_Pin_10 #define LED3 GPIO_Pin_11 #define LED4 GPIO_Pin_12 #define LED5 GPIO_Pin_13 #define LED6 GPIO_Pin_14 #define LED7 GPIO_Pin_15 #define LEDALL GPIO_Pin_Allvoid LED_Init(void); void LED_Con(uint16_t LED,uint16_t Status);

KEY

• 引脚
• KEY STM32
  KEY1 PA0
  KEY2 PA8
  KEY3 PB1
  KEY4 PB2
• key.c

void KEY_Init(void) { GPIO_InitTypeDef GPIO_InitStructure; RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA|RCC_APB2Periph_GPIOB, ENABLE); GPIO_InitStructure.GPIO_Pin = GPIO_Pin_1|GPIO_Pin_2; GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU; GPIO_Init(GPIOB, &GPIO_InitStructure); GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0|GPIO_Pin_8; GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU; GPIO_Init(GPIOA, &GPIO_InitStructure); }void KEY_Scan() { static u16 key1_sum=0,key2_sum=0,key3_sum=0,key4_sum=0; if(KEY1==0) { key1_sum++; if(key1_sum==1) { } if(key1_sum==40)//长按触发 { key1_sum==30；//为了显示效果不断长按触发 } }else { key1_sum=0; } if(KEY2==0) { key2_sum++; if(key2_sum==1) { } }else { key2_sum=0; } }

• key.h

#include "stm32f10x.h"#define KEY1 GPIO_ReadInputDataBit(GPIOA,GPIO_Pin_0) #define KEY2 GPIO_ReadInputDataBit(GPIOA,GPIO_Pin_8) #define KEY3 GPIO_ReadInputDataBit(GPIOB,GPIO_Pin_1) #define KEY4 GPIO_ReadInputDataBit(GPIOB,GPIO_Pin_2)void KEY_Init(void); void KEY_Scan(void);

• 滴答

void SysTick_Handler(void) { static u8 key_sum = 0; TimingDelay--; if(++key_sum == 50)// 50ms { key_sum = 0; KEY_Flag = 1; } }

• main

KEY_Init(); while(1) { if(KEY_Flag) //按键读取 { KEY_Flag = 0; KEY_Read(); } }

• 快速驱动
• 这个没啥快速的，记住是上拉脚

LCD

STM3210B_LCD_Init(); //初始化 LCD_Clear(Blue); //清屏 LCD_SetBackColor(Blue); //设置背景色，高亮用。在写字之前改色，之后在改回来 LCD_SetTextColor(White); //设置字体色

u8 string[20]; //全局变量LCD_SetBackColor(Blue); sprintf((char*)string,"measure"); //写字 LCD_DisplayStringLine(Line1,string); sprintf((char*)string,"AO1: %.2f",AO1); LCD_DisplayStringLine(Line5,string);

USART驱动
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• usart.c

void USART2_Init(u32 bound) { GPIO_InitTypeDef GPIO_InitStructure; USART_InitTypeDef USART_InitStructure; NVIC_InitTypeDef NVIC_InitStructure; RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE); //使能PA口时钟 RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART2, ENABLE); //使能串口2时钟 NVIC_InitStructure.NVIC_IRQChannel = USART2_IRQn; // 开启串口2中断 NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0; //抢占优先级为最高 NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0; //相应优先级为最高 NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; //使能中断 NVIC_Init(&NVIC_InitStructure); GPIO_InitStructure.GPIO_Pin = GPIO_Pin_2; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP; GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; GPIO_Init(GPIOA, &GPIO_InitStructure); //PA2为发送引脚，因此要配置成复用输出模式 GPIO_InitStructure.GPIO_Pin = GPIO_Pin_3; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING; GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; GPIO_Init(GPIOA, &GPIO_InitStructure); //PA3为接收引脚，因此要配置成浮空输入模式 USART_InitStructure.USART_BaudRate = bound; //波特率 USART_InitStructure.USART_WordLength = USART_WordLength_8b; //8位数据 USART_InitStructure.USART_StopBits = USART_StopBits_1; //1位停止位 USART_InitStructure.USART_Parity = USART_Parity_No; //无奇偶校验位 USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx; //使能发送和接收 USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None; USART_Init(USART2,&USART_InitStructure); //不使能硬件流控制USART_Cmd(USART2,ENABLE); //使能串口 USART_ITConfig(USART2, USART_IT_RXNE, ENABLE); //使能接收中断}void USART2_SendString(u8 *str) { u8 index = 0; do { USART_SendData(USART2,str[index]); //发送数据 while(USART_GetFlagStatus(USART2, USART_FLAG_TXE) == 0); // 是否发送完成 index++; }while(str[index] != 0); }

• usart.h

void USART2_Init(u32 bound); void USART2_SendString(u8 *str);

• 中断

void USART2_IRQHandler(void) { u8 temp; if(USART_GetITStatus(USART2,USART_IT_RXNE) == SET) { USART_ClearITPendingBit(USART2,USART_IT_RXNE); temp =USART_ReceiveData(USART2); if(temp == '\n') { RXCUNT = 0; RXOVER = 1; USART_ITConfig(USART2, USART_IT_RXNE, DISABLE); }else { RXBUF[RXCUNT] = temp; RXCUNT++; } } }

• main

NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2); USART2_Init(9600); while(1) { if(RXOVER) { LCD_ClearLine(Line3); LCD_DisplayStringLine(Line4, RXBUF); USART2_SendString(RXBUF); for(i=0; i<20; i++) { RXBUF[i] = 0; } USART_ITConfig(USART2, USART_IT_RXNE, ENABLE); RXOVER = 0; } }

• 快速驱动

Project->STM32F10x_StdPeriph_Examples->USART->Interrupt"文件夹下，打开"main.c":

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E2PROM 直接把比赛提供的"i2c.c"和"i2c.h"复制粘贴到我们工程目录里的HARDWARE文件夹里，并把i2c.c添加到工程里

• i2c_add.c

void _24C02_write(u8 address ,u8 dat) { I2CStart(); I2CSendByte(0xa0); I2CWaitAck(); I2CSendByte(address); I2CWaitAck(); I2CSendByte(dat); I2CWaitAck(); I2CStop(); }u8_24C02_read(u8 address ) { u8 temp; I2CStart(); I2CSendByte(0xa0); I2CWaitAck(); I2CSendByte(address); I2CWaitAck(); I2CStart(); I2CSendByte(0xa1); I2CWaitAck(); temp= I2CReceiveByte(); I2CWaitAck(); I2CStop(); return temp; }

• i2c_add.h

#include "stm32f10x.h" #include "i2c.h" void _24C02_write(u8 address ,u8 dat); u8_24C02_read(u8 address );

• main

i2c_init(); va1=_24C02_read(0xa1); _24C02_write(0xa1,va1);

RTC rtc 一定要添加那两个库文件

• rtc.c

void My_Rtc_Init(u8 HH,u8 MM,u8 SS) { NVIC_InitTypeDef NVIC_InitStructure; RCC_APB1PeriphClockCmd(RCC_APB1Periph_PWR | RCC_APB1Periph_BKP, ENABLE); PWR_BackupAccessCmd(ENABLE); BKP_DeInit(); NVIC_InitStructure.NVIC_IRQChannel = RTC_IRQn; NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0; NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0; NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; NVIC_Init(&NVIC_InitStructure); RCC_LSICmd(ENABLE); RCC_RTCCLKConfig(RCC_RTCCLKSource_LSI); RCC_RTCCLKCmd(ENABLE); RTC_WaitForSynchro(); RTC_WaitForLastTask(); RTC_ITConfig(RTC_IT_SEC, ENABLE); RTC_WaitForLastTask(); RTC_SetPrescaler(40000-1); RTC_WaitForLastTask(); RTC_SetCounter(3600 * HH + 60 * MM + SS); RTC_WaitForLastTask(); }

• rtc.h

void My_Rtc_Init(u8 HH,u8 MM,u8 SS) ;

• 中断

extern u8 RTC_Flag ; void RTC_IRQHandler(void) { u32 Times; if (RTC_GetITStatus(RTC_IT_SEC) != RESET) { RTC_ClearITPendingBit(RTC_FLAG_SEC); Times = RTC_GetCounter(); RTC_WaitForLastTask(); RTC_Flag = 1; if(Times == (24 * 3600)) { RTC_SetCounter(0); RTC_WaitForLastTask(); } } }

• main

My_Rtc_Init(0,0,0); while(1) { if(RTC_Flag) { RTC_Flag = 0; TimeVal = RTC_GetCounter(); hour = TimeVal / 3600; min = TimeVal % 3600 / 60; sec = TimeVal % 3600 % 60; } sprintf((char*)string,"TIME:%d:%d:%d",hour,min,sec); LCD_DisplayStringLine(Line7,string); }

• 快速驱动
  “Project->STM32F10x_StdPeriph_Examples->RTC->LSI_Calib"文件夹下，打开"main.c”:
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  直接复制粘贴RTC_Configuration()部分，去掉最后两句代码，加上我们的计数值设定即可。

在相同目录下，打开"stm32f10x_it.c"还可以看到RTC中断函数相关代码，修改修改直接使用即可：

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ADC 基础板上一个ADC，外接板两个ADC

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• adc.c

void ADC1_Init(void) { GPIO_InitTypeDef GPIO_InitStructure; ADC_InitTypeDef ADC_InitStructure; RCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC1 | RCC_APB2Periph_GPIOA, ENABLE); GPIO_InitStructure.GPIO_Pin = GPIO_Pin_4|GPIO_Pin_5; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AIN; GPIO_Init(GPIOA, &GPIO_InitStructure); ADC_InitStructure.ADC_Mode = ADC_Mode_Independent; ADC_InitStructure.ADC_ScanConvMode = DISABLE; ADC_InitStructure.ADC_ContinuousConvMode = DISABLE; ADC_InitStructure.ADC_ExternalTrigConv = ADC_ExternalTrigConv_None; ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right; ADC_InitStructure.ADC_NbrOfChannel = 1; ADC_Init(ADC1, &ADC_InitStructure); ADC_Cmd(ADC1, ENABLE); ADC_ResetCalibration(ADC1); while(ADC_GetResetCalibrationStatus(ADC1)); ADC_StartCalibration(ADC1); while(ADC_GetCalibrationStatus(ADC1)); } u16 Get_Adc(u8 channel) { u16 temp; ADC_RegularChannelConfig(ADC1,channel,1,ADC_SampleTime_239Cycles5); ADC_SoftwareStartConvCmd(ADC1,ENABLE); while(ADC_GetFlagStatus(ADC1,ADC_FLAG_EOC)==0); temp= ADC_GetConversionValue(ADC1); ADC_SoftwareStartConvCmd(ADC1,DISABLE); return temp; }

• adc.h

#include "stm32f10x.h" void ADC1_Init(void); u16 Get_Adc(u8 channel);

• main

ADC1_Init(); while(1) { AO1=Get_Adc(4)*3.3/4096; AO2=Get_Adc(5)*3.3/4096; }

• 快速编写
• 
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u16 Get_Adc(u8 channel) { u16 temp; ADC_RegularChannelConfig(ADC1,channel,1,ADC_SampleTime_239Cycles5); //442 ADC_SoftwareStartConvCmd(ADC1,ENABLE); //438 while(ADC_GetFlagStatus(ADC1,ADC_FLAG_EOC)==0); //460 temp= ADC_GetConversionValue(ADC1); //444 ADC_SoftwareStartConvCmd(ADC1,DISABLE); //438 return temp; }

基础PWM输出

void TIM3_PWM_Init(u16 pwm_fre,u8 ch1_duty,u8 ch2_duty) { u16 arr; GPIO_InitTypeDef GPIO_InitStructure; TIM_OCInitTypeDef TIM_OCInitStructure; TIM_TimeBaseInitTypeDef TIM_TimeBaseInitStructure; RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE); RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM3, ENABLE); GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6 | GPIO_Pin_7; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP; //复用推挽输出 GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; GPIO_Init(GPIOA, &GPIO_InitStructure); arr = 1000000 / pwm_fre; TIM_TimeBaseInitStructure.TIM_Period = arr - 1; //计数值 TIM_TimeBaseInitStructure.TIM_Prescaler = 71; //分频系数 72分频 TIM_TimeBaseInitStructure.TIM_CounterMode = 0x0; //向上计数 TIM_TimeBaseInitStructure.TIM_ClockDivision = 0x0; //不分频 TIM_TimeBaseInit(TIM3, &TIM_TimeBaseInitStructure); TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM2; TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_Low; TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable; TIM_OCInitStructure.TIM_Pulse = (arr - 1) * ch1_duty / 100; TIM_OC1Init( TIM3, &TIM_OCInitStructure); TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM2; TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_Low; TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable; TIM_OCInitStructure.TIM_Pulse = (arr - 1) * ch2_duty / 100; TIM_OC2Init( TIM3, &TIM_OCInitStructure); TIM_CtrlPWMOutputs(TIM3, ENABLE); TIM_Cmd( TIM3,ENABLE); }

“Project->STM32F10x_StdPeriph_Examples->TIM->PWM_Output”

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高级定时器PWM互补输出

void TIM1_PWM_Init(u16 fre,u8 duty,u8 status,u8 enable) { u16 frequency; GPIO_InitTypeDef GPIO_InitStructure; TIM_TimeBaseInitTypeDef TIM_TimeBaseInitStructure; TIM_OCInitTypeDef TIM_OCInitStructure; if(status) { RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB | RCC_APB2Periph_GPIOA, ENABLE); RCC_APB2PeriphClockCmd(RCC_APB2Periph_TIM1, ENABLE); GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP; GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; GPIO_Init(GPIOA, &GPIO_InitStructure); GPIO_InitStructure.GPIO_Pin = GPIO_Pin_14; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP; GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; GPIO_Init(GPIOB, &GPIO_InitStructure); } frequency = 1000000 / fre; TIM_TimeBaseInitStructure.TIM_Period = frequency - 1; TIM_TimeBaseInitStructure.TIM_Prescaler = 71; TIM_TimeBaseInitStructure.TIM_ClockDivision = 0x0; TIM_TimeBaseInitStructure.TIM_CounterMode = 0x0; TIM_TimeBaseInit(TIM1, &TIM_TimeBaseInitStructure); TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM2; if(enable) { TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable; TIM_OCInitStructure.TIM_OutputNState = TIM_OutputNState_Enable; }else { TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Disable; TIM_OCInitStructure.TIM_OutputNState = TIM_OutputNState_Disable; } TIM_OCInitStructure.TIM_Pulse = (frequency - 1) * duty / 100; TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_Low; TIM_OCInitStructure.TIM_OCNPolarity = TIM_OCNPolarity_Low; TIM_OCInitStructure.TIM_OCIdleState = TIM_OCIdleState_Set; TIM_OCInitStructure.TIM_OCNIdleState = TIM_OCNIdleState_Reset; TIM_OC2Init(TIM1,&TIM_OCInitStructure); TIM_CtrlPWMOutputs(TIM1, ENABLE); TIM_Cmd(TIM1, ENABLE); }

PWM比较输出
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• pwm.c

extern u16 CH1_Val; extern u16 CH2_Val; extern u16 CH1_Duty; extern u16 CH2_Duty; void TIM3_PWM_OUT(u16 ch1_val,u16 ch1_duty,u16 ch2_val,u16 ch2_duty,u8 enable1,u8 enable2,u8 enable) { GPIO_InitTypeDef GPIO_InitStructure; NVIC_InitTypeDef NVIC_InitStructure; TIM_TimeBaseInitTypeDefTIM_TimeBaseStructure; TIM_OCInitTypeDefTIM_OCInitStructure; RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM3, ENABLE); RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA , ENABLE); GPIO_InitStructure.GPIO_Pin =GPIO_Pin_6 | GPIO_Pin_7 ; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP; GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; GPIO_Init(GPIOA, &GPIO_InitStructure); NVIC_InitStructure.NVIC_IRQChannel = TIM3_IRQn; NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0; NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0; NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; NVIC_Init(&NVIC_InitStructure); TIM_TimeBaseStructure.TIM_Period = 65535; TIM_TimeBaseStructure.TIM_Prescaler = 71; TIM_TimeBaseStructure.TIM_ClockDivision = 0; TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up; TIM_TimeBaseInit(TIM3, &TIM_TimeBaseStructure); CH1_Val = 1000000/ ch1_val; CH2_Val = 1000000/ ch2_val; CH1_Duty =CH1_Val* ch1_duty/100; CH2_Duty =CH2_Val* ch2_duty/100; TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_Toggle; TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable; TIM_OCInitStructure.TIM_Pulse = CH1_Val; TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_Low; if(enable1) { TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable; }else { TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Disable; } TIM_OC1Init(TIM3, &TIM_OCInitStructure); TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_Toggle; TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable; TIM_OCInitStructure.TIM_Pulse = CH2_Val; TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_Low; if(enable2) { TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable; }else { TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Disable; } TIM_OC2Init(TIM3, &TIM_OCInitStructure); //TIM_SetCounter(TIM3, 0x0); //TIM_SetCompare1(TIM3,0x0); //TIM_SetCompare2(TIM3,0x0); if(enable) { TIM_Cmd(TIM3, ENABLE); TIM_ITConfig(TIM3, TIM_IT_CC1 | TIM_IT_CC2 , ENABLE); } else { TIM_Cmd(TIM3, DISABLE); TIM_ITConfig(TIM3, TIM_IT_CC1 | TIM_IT_CC2 , DISABLE); }}

• pwm.h

#include "stm32f10x.h"void TIM3_PWM_OUT(u16 ch1_val,u16 ch1_duty,u16 ch2_val,u16 ch2_duty,u8 enable1,u8 enable2,u8 enable);

• 中断

u8 TIM3_CH1_Flag; u8 TIM3_CH2_Flag; extern u16 CH1_Val; extern u16 CH2_Val; extern u16 CH1_Duty; extern u16 CH2_Duty; void TIM3_IRQHandler(void) { u16capture; if (TIM_GetITStatus(TIM3, TIM_IT_CC1) != RESET) {TIM_ClearITPendingBit(TIM3, TIM_IT_CC1 ); capture = TIM_GetCapture1(TIM3); if(TIM3_CH1_Flag)TIM_SetCompare1(TIM3, capture +CH1_Duty); elseTIM_SetCompare1(TIM3, capture + CH1_Val-CH1_Duty); TIM3_CH1_Flag ^=1; } if (TIM_GetITStatus(TIM3, TIM_IT_CC2) != RESET) { TIM_ClearITPendingBit(TIM3, TIM_IT_CC2); capture = TIM_GetCapture2(TIM3); if(TIM3_CH2_Flag)TIM_SetCompare2(TIM3, capture + CH2_Duty ); elseTIM_SetCompare2(TIM3, capture + CH2_Val-CH2_Duty); TIM3_CH2_Flag ^=1; } }

• main

TIM3_PWM_OUT(1000,20,4000,40,1,1,1);

• 快速驱动
  Project->STM32F10x_StdPeriph_Examples->TIM->OCToggle"文件夹下，打开"main.c":

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再打开同目录下的"stm32f10x_it.h":

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PWM比较异相输出 D = (Vo/3.3)*360°，

void TIM3_Output_Init(u16 fre,u16 deg,u8 status,u8 enable) { u16 phase; GPIO_InitTypeDef GPIO_InitStructure; NVIC_InitTypeDef NVIC_InitStructure; TIM_TimeBaseInitTypeDef TIM_TimeBaseInitStructure; TIM_OCInitTypeDef TIM_OCInitStructure; if(status) { RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA ,ENABLE); RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM3 ,ENABLE); GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6 | GPIO_Pin_7; GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP; GPIO_Init(GPIOA, &GPIO_InitStructure); NVIC_InitStructure.NVIC_IRQChannel = TIM3_IRQn; NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0; NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0; NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; NVIC_Init(&NVIC_InitStructure); TIM_TimeBaseInitStructure.TIM_Period = 0xffff; TIM_TimeBaseInitStructure.TIM_Prescaler = 71; TIM_TimeBaseInitStructure.TIM_CounterMode = 0x0; TIM_TimeBaseInitStructure.TIM_ClockDivision = 0x0; TIM_TimeBaseInit(TIM3, &TIM_TimeBaseInitStructure); } CH_Val = 1000000 / fre; phase = CH_Val * deg / 360; TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_Toggle; if(enable) { TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable; }else { TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Disable; } TIM_OCInitStructure.TIM_Pulse = CH_Val; TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_Low; TIM_OC1Init(TIM3, &TIM_OCInitStructure); TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_Toggle; if(enable) { TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable; }else { TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Disable; } TIM_OCInitStructure.TIM_Pulse = CH_Val; TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_Low; TIM_OC2Init(TIM3, &TIM_OCInitStructure); TIM_SetCounter(TIM3, 0X0); TIM_SetCompare1(TIM3, 0X0); TIM_SetCompare2(TIM3, phase); TIM_Cmd(TIM3,ENABLE); TIM_ITConfig( TIM3, TIM_IT_CC1 | TIM_IT_CC2,ENABLE); }

void TIM3_IRQHandler(void) { u16 capture; if(TIM_GetITStatus(TIM3, TIM_IT_CC1) == 1) { TIM_ClearITPendingBit( TIM3, TIM_IT_CC1); capture = TIM_GetCapture1(TIM3); TIM_SetCompare1(TIM3, capture + CH_Val * 0.5); }if(TIM_GetITStatus(TIM3, TIM_IT_CC2) == 1) { TIM_ClearITPendingBit( TIM3, TIM_IT_CC2); capture = TIM_GetCapture2(TIM3); TIM_SetCompare2(TIM3, capture + CH_Val * 0.5); } }

CAPTURE

• capture.c

void TIM2_PWM_IN() { GPIO_InitTypeDef GPIO_InitStructure; NVIC_InitTypeDef NVIC_InitStructure; TIM_ICInitTypeDefTIM_ICInitStructure; TIM_TimeBaseInitTypeDefTIM_TimeBaseStructure; RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2, ENABLE); RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE); GPIO_InitStructure.GPIO_Pin =GPIO_Pin_1|GPIO_Pin_2; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING; GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; GPIO_Init(GPIOA, &GPIO_InitStructure); NVIC_InitStructure.NVIC_IRQChannel = TIM2_IRQn; NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0; NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0; NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; NVIC_Init(&NVIC_InitStructure); TIM_TimeBaseStructure.TIM_Period = 65535; TIM_TimeBaseStructure.TIM_Prescaler = 71; TIM_TimeBaseStructure.TIM_ClockDivision = 0; TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up; TIM_TimeBaseInit(TIM2, &TIM_TimeBaseStructure); TIM_ICInitStructure.TIM_Channel = TIM_Channel_2; TIM_ICInitStructure.TIM_ICPolarity = TIM_ICPolarity_Rising; TIM_ICInitStructure.TIM_ICSelection = TIM_ICSelection_DirectTI; TIM_ICInitStructure.TIM_ICPrescaler = TIM_ICPSC_DIV1; TIM_ICInitStructure.TIM_ICFilter = 0x0; TIM_ICInit(TIM2, &TIM_ICInitStructure); TIM_ICInitStructure.TIM_Channel = TIM_Channel_3; TIM_ICInitStructure.TIM_ICPolarity = TIM_ICPolarity_Rising; TIM_ICInitStructure.TIM_ICSelection = TIM_ICSelection_DirectTI; TIM_ICInitStructure.TIM_ICPrescaler = TIM_ICPSC_DIV1; TIM_ICInitStructure.TIM_ICFilter = 0x0; TIM_ICInit(TIM2, &TIM_ICInitStructure); TIM_Cmd(TIM2, ENABLE); TIM_ITConfig(TIM2, TIM_IT_CC2|TIM_IT_CC3, ENABLE); }

• capture.h

#include "stm32f10x.h"void TIM2_PWM_IN(void);

• 中断

extern u8 TIM2_CH2_CAPTURE_MODE ; extern u32 TIM2_CH2_CAPTURE_H ; extern u32 TIM2_CH2_CAPTURE_HL; extern u8 TIM2_CH3_CAPTURE_MODE ; extern u32 TIM2_CH3_CAPTURE_H ; extern u32 TIM2_CH3_CAPTURE_HL ; void TIM2_IRQHandler(void) { if(TIM_GetITStatus(TIM2, TIM_IT_CC2) == SET) { TIM_ClearITPendingBit(TIM2, TIM_IT_CC2); if(capture_flag) { switch(TIM2_CH2_CAPTURE_MODE) { case 0: TIM2_CH2_CAPTURE_H=0; TIM2_CH2_CAPTURE_HL=0; TIM2_CH2_CAPTURE_MODE=1; TIM_OC2PolarityConfig(TIM2,TIM_OCPolarity_Low); TIM_SetCounter(TIM2,0x0); break; case 1: TIM2_CH2_CAPTURE_H= TIM_GetCounter(TIM2); TIM_OC2PolarityConfig(TIM2,TIM_OCPolarity_High); TIM2_CH2_CAPTURE_MODE=2; break; case 2: TIM2_CH2_CAPTURE_HL=TIM_GetCounter(TIM2); TIM_OC2PolarityConfig(TIM2,TIM_OCPolarity_High); TIM2_CH2_CAPTURE_MODE=3; break; } }else { TIM2_CH2_CAPTURE_MODE=0; TIM_OC2PolarityConfig(TIM2,TIM_OCPolarity_High); } }if(TIM_GetITStatus(TIM2, TIM_IT_CC3) == SET) { TIM_ClearITPendingBit(TIM2, TIM_IT_CC3); if(!capture_flag) { switch(TIM2_CH3_CAPTURE_MODE) { case 0: TIM2_CH3_CAPTURE_H=0; TIM2_CH3_CAPTURE_HL=0; TIM2_CH3_CAPTURE_MODE=1; TIM_OC3PolarityConfig(TIM2,TIM_OCPolarity_Low); TIM_SetCounter(TIM2,0x0); break; case 1: TIM2_CH3_CAPTURE_H= TIM_GetCounter(TIM2); TIM_OC3PolarityConfig(TIM2,TIM_OCPolarity_High); TIM2_CH3_CAPTURE_MODE=2; break; case 2: TIM2_CH3_CAPTURE_HL=TIM_GetCounter(TIM2); TIM_OC3PolarityConfig(TIM2,TIM_OCPolarity_High); TIM2_CH3_CAPTURE_MODE=3; break; } }else { TIM2_CH3_CAPTURE_MODE=0; TIM_OC3PolarityConfig(TIM2,TIM_OCPolarity_High); }} }

• main

u16 TIM2_CH2_Fre; //全局变量 u16 TIM2_CH3_Fre; u16 TIM2_CH2_Duty; u16 TIM2_CH3_Duty; u8 TIM2_CH2_CAPTURE_MODE = 0; //全局变量 u32 TIM2_CH2_CAPTURE_H = 0; u32 TIM2_CH2_CAPTURE_HL = 0; u8 TIM2_CH3_CAPTURE_MODE = 0; u32 TIM2_CH3_CAPTURE_H = 0; u32 TIM2_CH3_CAPTURE_HL = 0; while(1) { if(TIM2_CH2_CAPTURE_MODE==3) { TIM2_CH2_Fre=1000000/TIM2_CH2_CAPTURE_HL/1000; TIM2_CH2_Duty=TIM2_CH2_CAPTURE_H*100/TIM2_CH2_CAPTURE_HL; TIM2_CH2_CAPTURE_MODE = 0; } if(TIM2_CH3_CAPTURE_MODE==3) { TIM2_CH3_Fre=1000000/TIM2_CH3_CAPTURE_HL/1000; TIM2_CH3_Duty=TIM2_CH3_CAPTURE_H*100/TIM2_CH3_CAPTURE_HL; TIM2_CH3_CAPTURE_MODE = 0; } }

• 快速驱动

Project->STM32F10x_StdPeriph_Examples->TIM->InputCapture"文件夹下,"main.c"和"stm32f10x_it.c"分别有着输入捕获模式初始化和中断服务程序相关代码：

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ds18b20
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#include "ds18b20.h" int main() { u32 z; u8 str[20]; ... ds18b20_init_x(); while(1) { z=(ds18b20_read()&0x7ff); LCD_ClearLine(Line0); sprintf(str," t= %2.2f",(float)z/16.); LCD_DisplayStringLine(Line0, str); } }

DHT11
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#include "dht11.h" int main() { u32 z; u8 str[20]; ... dht11_init(); while(1) { z=dht11_read(); LCD_ClearLine(Line1); sprintf(str1," shidu= %2d %%",z>>24); LCD_DisplayStringLine(Line1, str1); LCD_ClearLine(Line2); sprintf(str1," wendu= %3d ",(z>>8)&0xff); LCD_DisplayStringLine(Line2, str1); delay_ms(2000); } }

总结 【蓝桥杯国赛复习总结】到现在为止参加的两年蓝桥杯中从大一迷茫稀里糊涂的省二，到大二可以进入国赛。
感谢自己在大一时候早早的开始学习32，希望自己能在国赛取得一个不让自己后悔的成绩

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