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標(biāo)題: STM32串口配置（串口三的配置=初始化+中斷配置+中斷接收函數(shù)） [打印本頁]

作者: 13118302007 時(shí)間: 2021-11-7 17:47
標(biāo)題: STM32串口配置（串口三的配置=初始化+中斷配置+中斷接收函數(shù)）
繼前貼http://m.raoushi.com/bbs/dpj-213781-1.html，今天發(fā)布STM32的串口3配置程序，話不多說。

  1 /*===============================================================================
  2 Copyright:
  3 Version:
  4 Author:
  5 Date: 2017/11/3
  6 Description:
  7    函數(shù)功能是將接收固定長度的字符串，并將接收后的字符串通過串口發(fā)送出去
  8    通過滴答定時(shí)器方式獲取數(shù)據(jù)
  9 revise Description:
10 ===============================================================================*/
11 #include "stm32f10x_usart.h"
12 #include "stm32f10x.h"
13
14 #define USART3_TIMEOUT_Setting 800  //(ms)
15
16 u8 USART3_RX_BUF[250];
17 u16 USART3_RX_CNT=0;
18 u16 USART3_RX_TIMEOUT=0;    //接收狀態(tài)標(biāo)記
19
20 void Timer1CountInitial(void);
21
22 void USART3_Init(u32 baud)
23 {
24    USART_InitTypeDef USART_InitStructure;
25    NVIC_InitTypeDef NVIC_InitStructure;
26    GPIO_InitTypeDef GPIO_InitStructure; //聲明一個(gè)結(jié)構(gòu)體變量，用來初始化GPIO
27    //使能串口的RCC時(shí)鐘
28    RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB , ENABLE); //使能UART3所在GPIOB的時(shí)鐘
29    RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART3, ENABLE);
30
31    //串口使用的GPIO口配置
32    // Configure USART3 Rx (PB.11) as input floating
33    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_11;
34    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
35    GPIO_Init(GPIOB, &GPIO_InitStructure);
36
37    // Configure USART3 Tx (PB.10) as alternate function push-pull
38    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10;
39    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
40    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
41    GPIO_Init(GPIOB, &GPIO_InitStructure);
42
43    //配置串口
44    USART_InitStructure.USART_BaudRate = baud;
45    USART_InitStructure.USART_WordLength = USART_WordLength_8b;
46    USART_InitStructure.USART_StopBits = USART_StopBits_1;
47    USART_InitStructure.USART_Parity = USART_Parity_No;
48    USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
49    USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;
50
51
52    // Configure USART3
53    USART_Init(USART3, &USART_InitStructure);//配置串口3
54    // Enable USART3 Receive interrupts 使能串口接收中斷
55    USART_ITConfig(USART3, USART_IT_RXNE, ENABLE);
56    // Enable the USART3
57    USART_Cmd(USART3, ENABLE);//使能串口3
58
59    //串口中斷配置
60    //Configure the NVIC Preemption Priority Bits
61    NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);
62
63    // Enable the USART3 Interrupt
64    NVIC_InitStructure.NVIC_IRQChannel = USART3_IRQn;
65    NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority=3 ;//搶占優(yōu)先級(jí)3
66    NVIC_InitStructure.NVIC_IRQChannelSubPriority = 2;       //子優(yōu)先級(jí)3
67    NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
68    NVIC_Init(&NVIC_InitStructure);
69
70 }
71
72 void USART3_Sned_Char(u8 temp)
73 {
74    USART_SendData(USART3,(u8)temp);
75    while(USART_GetFlagStatus(USART3,USART_FLAG_TXE)==RESET);
76
77 }
78
79 void USART3_Sned_Char_Buff(u8 buf[],u32 len)
80 {
81    u32 i;
82    for(i=0;i<len;i++)
83    USART3_Sned_Char(buf[ i]);
84
85 }
86
87 void main(void)
88 {
89    Timer1CountInitial();
90    Usart3_Init(9600);//串口1波特率設(shè)置為9600
91    while(1)
92    {
93       if(USART3_RX_TIMEOUT==USART3_TIMEOUT_Setting)
94       {
95          USART3_RX_TIMEOUT=0;
96          USART3_Sned_Char_Buff(USART3_RX_BUF,USART3_RX_CNT);//將接收到的數(shù)據(jù)發(fā)送出去
97          USART3_RX_CNT=0;
98       }
99
100    }
101 }
102 void USART3_IRQHandler(void)                   //串口3中斷服務(wù)程序
103 {
104    u8 Res;
105    if(USART_GetITStatus(USART3, USART_IT_RXNE) != RESET)
106    {
107       USART3_RX_TIMEOUT=0;
108       USART3_RX_BUF[USART3_RX_CNT++] = USART_ReceiveData(USART3); //讀取接收到的數(shù)據(jù)
109    }
110    //溢出-如果發(fā)生溢出需要先讀SR,再讀DR寄存器則可清除不斷入中斷的問題
111    if(USART_GetFlagStatus(USART3,USART_FLAG_ORE) == SET)
112    {
113       USART_ReceiveData(USART3);
114       USART_ClearFlag(USART3,USART_FLAG_ORE);
115    }
116    USART_ClearITPendingBit(USART3, USART_IT_RXNE);
117
118 }
119
120 //放到主函數(shù)的初始化中初始化
121 void Timer1CountInitial(void)
122 {
123    //定時(shí)=36000/72000x2=0.001s=1ms;
124       TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
125       ///////////////////////////////////////////////////////////////
126       RCC_APB2PeriphClockCmd(RCC_APB2Periph_TIM1, ENABLE);
127
128       TIM_TimeBaseStructure.TIM_Period = 100-1;//自動(dòng)重裝值（此時(shí)改為10ms）
129       TIM_TimeBaseStructure.TIM_Prescaler = 7200-1;//時(shí)鐘預(yù)分頻
130       TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;//向上計(jì)數(shù)
131       TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1;       //時(shí)鐘分頻1
132       TIM_TimeBaseStructure.TIM_RepetitionCounter = 0;
133       TIM_TimeBaseInit(TIM1,&TIM_TimeBaseStructure);
134
135       TIM_ClearFlag(TIM1,TIM_FLAG_Update);
136       TIM_ITConfig(TIM1,TIM_IT_Update,ENABLE);
137       TIM_Cmd(TIM1, ENABLE);
138 }
139 void TIM1_UP_IRQHandler(void)
140 {
141    //TIM_TimeBaseStructure.TIM_Period = 100-1;//自動(dòng)重裝值（此時(shí)改為10ms）
142    if (TIM_GetITStatus(TIM1, TIM_IT_Update) != RESET)
143    {
144       if(USART3_RX_TIMEOUT<USART3_TIMEOUT_Setting)
145                USART3_RX_TIMEOUT++;
146    }
147    TIM_ClearITPendingBit(TIM1,TIM_IT_Update);
148 }

作者: pjh2003 時(shí)間: 2021-11-8 14:18
樓主能發(fā)一個(gè)同時(shí)開啟二個(gè)串口，都支持串口發(fā)送和中斷接收的程序嗎？

作者: pjh2003 時(shí)間: 2021-11-8 14:22
可以發(fā)一個(gè)二個(gè)串口同時(shí)工作，都能發(fā)送和中斷接收的程序嗎，我現(xiàn)在測試的串口程序是二個(gè)串口單獨(dú)都能正常工作，只要二個(gè)口串口都開啟中斷時(shí)，就有一個(gè)串口工作不正常！

作者: 我是華夏人 時(shí)間: 2021-11-8 20:32

pjh2003 發(fā)表于 2021-11-8 14:22
可以發(fā)一個(gè)二個(gè)串口同時(shí)工作，都能發(fā)送和中斷接收的程序嗎，我現(xiàn)在測試的串口程序是二個(gè)串口單獨(dú)都能正常工 ...

同求需要同時(shí)開啟兩個(gè)串口

作者: haide1998 時(shí)間: 2024-5-20 09:19
串口中斷函數(shù)處理部分
void USART1_IRQHandler(void)
{
USART_ClearFlag(USART1,USART_FLAG_TC);
if(USART_GetITStatus(USART1,USART_IT_RXNE)!=Bit_RESET)
{
u8 k=USART_ReceiveData(USART1);
serial1_sned_char(k+1);
}
}

void USART2_IRQHandler(void)
{
USART_ClearFlag(USART2,USART_FLAG_TC);
if(USART_GetITStatus(USART2,USART_IT_RXNE)!=Bit_RESET)
{
u8 k=USART_ReceiveData(USART2);
serial1_sned_char(k+1);
}
}

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