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          EEPW首頁(yè) > 嵌入式系統(tǒng) > 設(shè)計(jì)應(yīng)用 > STM32串口通信測(cè)試程序

          STM32串口通信測(cè)試程序

          作者: 時(shí)間:2016-11-28 來(lái)源:網(wǎng)絡(luò) 收藏
          // 5個(gè)串口均可工作,已經(jīng)把定時(shí)器中斷、 串口中斷和配置函數(shù)寫(xiě)在一個(gè)文件中 晶振 8Mhz
          #include "stm32f10x_lib.h"
          #include"stdio.h"
          #define uchar unsigned char
          #define uint unsigned int
          #define ulong unsigned long
          uint TimingDelay;
          #define YES 1
          #define NO 0
          #define COM1_TX_EN GPIO_ResetBits(GPIOC,GPIO_Pin_1) // GPIOC->BSRR=0xfd //&=0xfd //USART1 發(fā)送使能
          #define COM1_RX_EN GPIO_SetBits(GPIOC,GPIO_Pin_1) // GPIOC->BSRR=0x02 //|=0x02 //USART1 禁止發(fā)送
          #define COM2_TX_EN GPIO_ResetBits(GPIOC,GPIO_Pin_2) // GPIOC->BSRR=0xfd //&=0xfd //USART2 發(fā)送使能
          #define COM2_RX_EN GPIO_SetBits(GPIOC,GPIO_Pin_2)
          #define COM3_TX_EN GPIO_ResetBits(GPIOC,GPIO_Pin_3) // GPIOC->BSRR=0xfd //&=0xfd //USART3 發(fā)送使能
          #define COM3_RX_EN GPIO_SetBits(GPIOC,GPIO_Pin_3) // GPIOC->BSRR=0x02 //|=0x02 //USART3 禁止發(fā)送
          #define COM4_TX_EN GPIO_ResetBits(GPIOC,GPIO_Pin_4) // GPIOC->BSRR=0xfd //&=0xfd //UART4 發(fā)送使能
          #define COM4_RX_EN GPIO_SetBits(GPIOC,GPIO_Pin_4) // GPIOC->BSRR=0x02 //|=0x02 //UART4 禁止發(fā)送
          //UART5 上行串口接收中斷數(shù)據(jù)定義
          uchar ComSynFlag; //=YES同步建立,UART0內(nèi)部私有
          uchar ComReceiveCounter; //接收字節(jié)計(jì)數(shù),UART0內(nèi)部私有
          uchar ComReceiveData[24]; //接收緩沖,UART0內(nèi)部私有
          GPIO_InitTypeDef GPIO_InitStructure;
          ErrorStatus HSEStartUpStatus;
          TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
          TIM_OCInitTypeDef TIM_OCInitStructure;
          u16 Status; //定時(shí)器累加
          void RCC_Configuration(void);
          void GPIO_Configuration(void);
          void NVIC_Configuration(void);
          void TIM2_Configuration(void);
          void UART5_Configuration(void);
          void SysTick_Configuration(void) ;
          void Com3TxChar(vu8);
          vu16 CCR1_Val = 0x0E10; //360 50Hz 20ms
          vu16 CCR2_Val = 0x0048; //7200 10hz 100ms
          vu16 CCR3_Val = 0x7530; //30000 10Hz
          vu16 CCR4_Val = 0x1000;
          u16 capture1 = 0;
          u16 capture2 = 0;
          u16 capture3 = 0;
          u16 capture4 = 0;
          int cnt1,cnt2,nt2=50;
          //UART1 下行串口接收中斷數(shù)據(jù)定義
          #define C1_LEN 300 //緩沖區(qū)長(zhǎng)度
          uint Com1RecCnt; //COM1接收字節(jié)計(jì)數(shù)
          uchar Com1RecDat[C1_LEN]; //COM1接收緩沖
          uchar Com1AnsDat[24];
          uint Com1AnsCnt;
          uint Com2RecCnt; //COM2接收字節(jié)計(jì)數(shù)
          uchar Com2RecDat[C1_LEN]; //COM2接收緩沖
          uchar Com2AnsDat[24];
          uint Com2AnsCnt;
          uint Com3RecCnt; //COM3接收字節(jié)計(jì)數(shù)
          uchar Com3RecDat[C1_LEN]; //COM3接收緩沖
          uchar Com3AnsDat[24];
          uint Com3AnsCnt;
          uint Com4RecCnt; //COM4接收字節(jié)計(jì)數(shù)
          uchar Com4RecDat[C1_LEN]; //COM4接收緩沖
          uchar Com4AnsDat[24];
          uint Com4AnsCnt;
          uint Time20msCnt; //20ms定時(shí)器
          uint T20msCnt; //20ms定時(shí)器
          uint T1sCnt; //1s定時(shí)器
          uchar RunCnt; //RUN LED閃光頻率參數(shù)
          //=======================================================================
          void RCC_Configuration()
          {
          ErrorStatus HSEStartUpStatus; //定義外部高速晶振啟動(dòng)狀態(tài)枚舉變量
          RCC_DeInit(); //復(fù)位RCC外部寄存器到默認(rèn)值
          RCC_HSEConfig(RCC_HSE_ON); //打開(kāi)外部高速晶振
          HSEStartUpStatus=RCC_WaitForHSEStartUp(); //等待外部高速時(shí)鐘準(zhǔn)備好
          if(HSEStartUpStatus==SUCCESS)
          { //外部高速時(shí)鐘已經(jīng)準(zhǔn)備好
          FLASH_PrefetchBufferCmd(FLASH_PrefetchBuffer_Enable); //開(kāi)啟FLASH預(yù)讀緩沖功能,加速FLASH的讀取。所有程序中必須的用法,位置:RCC初始化子函數(shù)里面,時(shí)鐘起振之后
          FLASH_SetLatency(FLASH_Latency_2); //FLASH時(shí)序延遲幾個(gè)周期,等待總線(xiàn)同步操作。推薦按照單片機(jī)系統(tǒng)運(yùn)行頻率,0—24MHz時(shí),取Latency=0;24—48MHz時(shí),取Latency=1;48~72MHz時(shí),取Latency=2。
          RCC_HCLKConfig(RCC_SYSCLK_Div1); //配置AHB(HCLK)==系統(tǒng)時(shí)鐘/1
          RCC_PCLK2Config(RCC_HCLK_Div1); //配置APB2(高速)(PCLK2)==系統(tǒng)時(shí)鐘/1
          RCC_PCLK1Config(RCC_HCLK_Div2); //配置APB1(低速)(PCLK1)==系統(tǒng)時(shí)鐘/2
          //注:AHB主要負(fù)責(zé)外部存儲(chǔ)器時(shí)鐘。APB2負(fù)責(zé)AD,I/O,高級(jí)TIM,串口1。APB1負(fù)責(zé)DA,USB,SPI,I2C,CAN,串口2345,普通TIM。
          RCC_PLLConfig(RCC_PLLSource_HSE_Div1,RCC_PLLMul_9); //配置PLL時(shí)鐘==(外部高速晶體時(shí)鐘/1)* 9 ==72MHz
          RCC_PLLCmd(ENABLE); //使能PLL時(shí)鐘
          while(RCC_GetFlagStatus(RCC_FLAG_PLLRDY)==RESET); //等待PLL時(shí)鐘就緒
          RCC_SYSCLKConfig(RCC_SYSCLKSource_PLLCLK); //配置系統(tǒng)時(shí)鐘==PLL時(shí)鐘
          while(RCC_GetSYSCLKSource()!=0x08); //等待系統(tǒng)時(shí)鐘源的啟動(dòng)
          }
          //==============以下為開(kāi)啟外設(shè)時(shí)鐘的操作============================//
          // RCC_AHBPeriphClockCmd (ABP2設(shè)備1 | ABP2設(shè)備2 , ENABLE); //啟動(dòng)AHB設(shè)備
          // RCC_APB2PeriphClockCmd(ABP2設(shè)備1 | ABP2設(shè)備2 , ENABLE); //啟動(dòng)ABP2設(shè)備
          // RCC_APB1PeriphClockCmd(ABP2設(shè)備1 | ABP2設(shè)備2 , ENABLE); //啟動(dòng)ABP1設(shè)備
          // RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA | RCC_APB2Periph_AFIO | RCC_APB2Periph_USART1 , ENABLE); //打開(kāi)APB2外設(shè)
          RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1 | RCC_APB2Periph_GPIOA | RCC_APB2Periph_AFIO | RCC_APB2Periph_GPIOB
          |RCC_APB2Periph_GPIOC | RCC_APB2Periph_GPIOD, ENABLE);
          RCC_APB1PeriphClockCmd(RCC_APB1Periph_UART5 |RCC_APB1Periph_UART4 |RCC_APB1Periph_USART2 |RCC_APB1Periph_USART3 | RCC_APB1Periph_TIM2,ENABLE);
          }
          //==============================================================
          void SysTick_Configuration(void) //延時(shí)函數(shù)初始化
          {
          SysTick_CLKSourceConfig(SysTick_CLKSource_HCLK);
          NVIC_SystemHandlerPriorityConfig(SystemHandler_SysTick, 3, 0);
          SysTick_SetReload(72000);
          SysTick_ITConfig(ENABLE);
          }
          //=================================
          void delay(u32 nTime)
          {
          SysTick_CounterCmd(SysTick_Counter_Enable);
          TimingDelay = nTime;
          while(TimingDelay != 0);
          SysTick_CounterCmd(SysTick_Counter_Disable);
          SysTick_CounterCmd(SysTick_Counter_Clear);
          }
          //==================================
          void TimingDelay_Decrement(void)
          {
          if (TimingDelay != 0x00)
          {
          TimingDelay--;
          }
          }
          void Delay(vu32 nCount)
          {
          for(; nCount != 0; nCount--);
          }
          //============================================
          void NVIC_Configuration(void )
          {
          NVIC_InitTypeDef NVIC_InitStructure; //定義一個(gè)中斷結(jié)構(gòu)體
          // NVIC_SetVectorTable(NVIC_VectTab_FLASH, 0x0); //設(shè)置中斷向量表的起始地址為0x08000000
          NVIC_PriorityGroupConfig(NVIC_PriorityGroup_0); //設(shè)置NVIC優(yōu)先級(jí)分組,方式。
          //注:一共16個(gè)優(yōu)先級(jí),分為搶占式和響應(yīng)式。兩種優(yōu)先級(jí)所占的數(shù)量由此代碼確定,NVIC_PriorityGroup_x可以是0、1、2、3、4,
          //分別代表?yè)屨純?yōu)先級(jí)有1、2、4、8、16個(gè)和響應(yīng)優(yōu)先級(jí)有16、8、4、2、1個(gè)。規(guī)定兩種優(yōu)先級(jí)的數(shù)量后,所有的中斷級(jí)別必須在其中選擇,
          //搶占級(jí)別高的會(huì)打斷其他中斷優(yōu)先執(zhí)行,而響應(yīng)級(jí)別高的會(huì)在其他中斷執(zhí)行完優(yōu)先執(zhí)行。
          NVIC_InitStructure.NVIC_IRQChannel = UART5_IRQChannel; //通道設(shè)置為串口5中斷
          NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0; //中斷響應(yīng)優(yōu)先級(jí)0
          NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; //打開(kāi)中斷
          NVIC_Init(&NVIC_InitStructure); //初始化
          //定時(shí)器2中斷
          NVIC_InitStructure.NVIC_IRQChannel = TIM2_IRQChannel;
          NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1;
          NVIC_InitStructure.NVIC_IRQChannelSubPriority = 2;
          NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
          NVIC_Init(&NVIC_InitStructure);
          NVIC_InitStructure.NVIC_IRQChannel = USART1_IRQChannel;
          NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1;
          NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
          NVIC_Init(&NVIC_InitStructure);
          NVIC_InitStructure.NVIC_IRQChannel = USART2_IRQChannel;
          NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1;
          NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
          NVIC_Init(&NVIC_InitStructure);
          NVIC_InitStructure.NVIC_IRQChannel = USART3_IRQChannel;
          NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1;
          NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
          NVIC_Init(&NVIC_InitStructure);
          NVIC_InitStructure.NVIC_IRQChannel = UART4_IRQChannel;
          NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1;
          NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
          NVIC_Init(&NVIC_InitStructure);
          }
          void GPIO_Configuration(void)
          {
          GPIO_InitTypeDef GPIO_InitStructure; //定義GPIO初始化結(jié)構(gòu)體
          //--------將UART5 的TX 配置為復(fù)用推挽輸出 AF_PP---------------------//
          GPIO_InitStructure.GPIO_Pin=GPIO_Pin_12; //管腳位置定義,標(biāo)號(hào)可以是NONE、ALL、0至15。
          GPIO_InitStructure.GPIO_Speed=GPIO_Speed_50MHz; //輸出速度50MHz
          GPIO_InitStructure.GPIO_Mode=GPIO_Mode_AF_PP; //推挽輸出模式 Out_PP
          GPIO_Init(GPIOC,&GPIO_InitStructure); //E組GPIO初始化
          //--------將USART1,USART2 的TX 配置為復(fù)用推挽輸出 AF_PP---------------------//
          GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9 |GPIO_Pin_2 | GPIO_Pin_0 | GPIO_Pin_6;
          GPIO_Init(GPIOA, &GPIO_InitStructure);
          //--------將USART3 的TX 配置為復(fù)用推挽輸出 AF_PP---------------------//
          GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10;
          GPIO_Init(GPIOB, &GPIO_InitStructure);
          //--------將UART4 的TX 配置為復(fù)用推挽輸出 AF_PP---------------------//
          GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10;
          GPIO_Init(GPIOC, &GPIO_InitStructure);
          //--------將UART5 的RX 配置為復(fù)用浮空輸入 IN_FLOATING---------------------//
          GPIO_InitStructure.GPIO_Pin=GPIO_Pin_2; //管腳位置定義
          //輸入模式下配置輸出速度無(wú)意義
          //GPIO_InitStructure.GPIO_Speed=GPIO_Speed_2MHz; //輸出速度2MHz
          GPIO_InitStructure.GPIO_Mode=GPIO_Mode_IN_FLOATING; //浮空輸入 IN_FLOATING
          GPIO_Init(GPIOD,&GPIO_InitStructure); //C組GPIO初始化
          //--------將USART1 USART2 的RX 配置為復(fù)用浮空輸入 IN_FLOATING---------------------//
          GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10 |GPIO_Pin_3;
          GPIO_InitStructure.GPIO_Mode=GPIO_Mode_IN_FLOATING; //浮空輸入 IN_FLOATING
          GPIO_Init(GPIOA, &GPIO_InitStructure);
          //--------將USART3 的RX 配置為復(fù)用浮空輸入 IN_FLOATING---------------------//
          GPIO_InitStructure.GPIO_Pin = GPIO_Pin_11;
          GPIO_InitStructure.GPIO_Mode=GPIO_Mode_IN_FLOATING; //浮空輸入 IN_FLOATING
          GPIO_Init(GPIOB, &GPIO_InitStructure);
          //--------將UART4 的RX 配置為復(fù)用浮空輸入 IN_FLOATING---------------------//
          GPIO_InitStructure.GPIO_Pin = GPIO_Pin_11;
          GPIO_InitStructure.GPIO_Mode=GPIO_Mode_IN_FLOATING; //浮空輸入 IN_FLOATING
          GPIO_Init(GPIOC, &GPIO_InitStructure);
          }
          //==============================================================
          void TIM2_Configuration(void)
          {
          TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;//定時(shí)器初始化結(jié)構(gòu)
          //TIM_ICInitTypeDef TIM_ICInitStructure; //通道輸入初始化結(jié)構(gòu)
          RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2, ENABLE);
          TIM_TimeBaseStructure.TIM_Period = 0xffff;
          TIM_TimeBaseStructure.TIM_Prescaler = 499; //時(shí)鐘分頻
          TIM_TimeBaseStructure.TIM_ClockDivision = 0x0; //時(shí)鐘分割
          TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
          TIM_TimeBaseInit(TIM2, &TIM_TimeBaseStructure); //基本初始化
          TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_Toggle;
          TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
          TIM_OCInitStructure.TIM_Pulse = CCR1_Val;
          TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_Low;
          TIM_OC1Init(TIM2, &TIM_OCInitStructure);
          TIM_OC1PreloadConfig(TIM2, TIM_OCPreload_Disable);
          TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
          TIM_OCInitStructure.TIM_Pulse = CCR2_Val;
          TIM_OC2Init(TIM2, &TIM_OCInitStructure);
          TIM_OC2PreloadConfig(TIM2, TIM_OCPreload_Disable);
          //TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
          //TIM_OCInitStructure.TIM_Pulse = 255;
          //TIM_OC4Init(TIM2, &TIM_OCInitStructure);
          TIM_Cmd(TIM2, ENABLE);
          TIM_ClearFlag(TIM2, TIM_FLAG_Update);
          TIM_ClearITPendingBit(TIM2, TIM_FLAG_Update); //清除TIM2等待中斷更新中斷標(biāo)志位
          TIM_ITConfig(TIM2, TIM_IT_CC1 |TIM_IT_CC2 , ENABLE);
          }

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