325 lines
9.8 KiB
C
325 lines
9.8 KiB
C
#include "sys.h"
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#include "usart.h"
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#include "led.h"
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//! 加入以下代码,支持prfintf函数,而不需要选择 use MicroLIB
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#if 1
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#pragma import(__use_no_semihosting)
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//! 标准库需要的支持函数
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struct __FILE
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{
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int handle;
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};
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FILE __stdout;
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//! 定义 _sys_exit() 避免使用半主机模式
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_sys_exit(int x)
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{
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x = x;
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}
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//! 重定义fputc函数
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//! 循环发送,直到发送完毕
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int fputc(int ch, FILE *f)
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{
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while((USART1->SR&0X40)==0);
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USART1->DR = (u8) ch;
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return ch;
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}
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#endif
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/*使用microLibd的方法*/
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/*
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int fputc(int ch, FILE *f)
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{
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USART_SendData(USART1, (uint8_t) ch);
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while (USART_GetFlagStatus(USART1, USART_FLAG_TC) == RESET) {}
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return ch;
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}
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int GetKey (void) {
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while (!(USART1->SR & USART_FLAG_RXNE));
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return ((int)(USART1->DR & 0x1FF));
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}
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*/
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//! 串口2,3数据接收和缓冲buffer
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u8 USART2_RX_BUF[10]={0},USART3_RX_BUF[75]={0},number_USART2=0,number_USART3=0;
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//! 串口2,3数据接收完成标志
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u16 USART2_RX_STA=0,USART3_RX_STA=0;
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//! 串口数据接收buffer
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u8 USART1_RX_BUF[7],number_USART1=0;
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//! 串口1接收状态标志
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u16 USART1_RX_STA=0;
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//********************************************************************//
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//! 函数名:uart1_init
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//! 功能:串口1初始化，接收噪音传感器数据
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//! 输入:bound:串口波特率
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//! 输出:none
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//********************************************************************//
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void uart1_init(u32 bound){
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//! 串口GPIO初始化
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GPIO_InitTypeDef GPIO_InitStructure;
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USART_InitTypeDef USART_InitStructure;
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NVIC_InitTypeDef NVIC_InitStructure;
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//! 使能串口1,GPIO1时钟
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RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1|RCC_APB2Periph_GPIOA|RCC_APB2Periph_AFIO, ENABLE);
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//! USART1_TX GPIOA.9
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GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9;
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GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
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//! 复用推挽输出
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GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
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//! 初始化PA.9
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GPIO_Init(GPIOA, &GPIO_InitStructure);
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//! USART1_RX GPIOA.10
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GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10;
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//! 浮空输入
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GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
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//! 初始化PA.10
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GPIO_Init(GPIOA, &GPIO_InitStructure);
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//! Usart1 NVIC 中断优先级配置
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NVIC_InitStructure.NVIC_IRQChannel = USART1_IRQn;
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//! 抢占优先级3
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NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority=3;
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//! 子优先级1
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NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1;
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//! 使能IRQ通道
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NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
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//! 初始化VIC寄存器
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NVIC_Init(&NVIC_InitStructure);
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//! USART1初始化
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//! 波特率
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USART_InitStructure.USART_BaudRate = bound;
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//! 8位数据格式
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USART_InitStructure.USART_WordLength = USART_WordLength_8b;
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//! 一个停止位
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USART_InitStructure.USART_StopBits = USART_StopBits_1;
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//! 无奇偶校验位
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USART_InitStructure.USART_Parity = USART_Parity_No;
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//! 无硬件数据流控制
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USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
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//! 收发模式
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USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;
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//! 初始化串口1
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USART_Init(USART1, &USART_InitStructure);
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//! 清除串口1中断标志
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USART_ClearFlag(USART1,USART_FLAG_TC);
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//! 开启串口接收中断
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USART_ITConfig(USART1, USART_IT_RXNE, ENABLE);
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//! 使能串口1
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USART_Cmd(USART1, ENABLE);
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}
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//********************************************************************//
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//! 函数名:USART1_IRQHandler
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//! 功能:串口1中断服务函数，接收噪音传感器数据
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//! 输入:none
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//! 输出:none
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//********************************************************************//
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void USART1_IRQHandler(void)
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{
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u8 temp;
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if(USART_GetITStatus(USART1, USART_IT_RXNE)==SET)
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{
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temp=USART_ReceiveData(USART1);
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//! 帧头(可能有数据等于帧头而接收出错的风险)
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if((temp==0XBB)||(number_USART1>0))
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{
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USART1_RX_BUF[number_USART1++]=temp;
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{
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//! 一帧6字节
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if((number_USART1==6)&&(USART1_RX_BUF[2]==0x01))
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{
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USART1_RX_STA=1;
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number_USART1=0;
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}
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}
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}
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}
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}
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//********************************************************************//
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//! 函数名:uart2_init
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//! 功能:串口2初始化，接收pm2.5传感器数据
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//! 输入:bound：波特率
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//! 输出:none
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//********************************************************************//
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void uart2_init(u32 bound)
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{
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//! GPIO初始化结构体
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GPIO_InitTypeDef GPIO_InitStructure;
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USART_InitTypeDef USART_InitStructure;
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NVIC_InitTypeDef NVIC_InitStructure;
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//! 使能GPIOA和USART2时钟
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RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE);
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RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART2, ENABLE);
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//! USART2_TX GPIOA.2初始化
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GPIO_InitStructure.GPIO_Pin = GPIO_Pin_2;
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GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
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GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
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GPIO_Init(GPIOA, &GPIO_InitStructure);
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//! USART2_RX GPIOA.3初始化
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GPIO_InitStructure.GPIO_Pin = GPIO_Pin_3;
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GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
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GPIO_Init(GPIOA, &GPIO_InitStructure);
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//! USART2 NVIC 中断优先级配置
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NVIC_InitStructure.NVIC_IRQChannel = USART2_IRQn;
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//! 抢占优先级2
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NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority=2;
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//! 子优先级3
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NVIC_InitStructure.NVIC_IRQChannelSubPriority = 3;
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//! IRQ通道使能
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NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
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//! 根据指定参数初始化VIC寄存器
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NVIC_Init(&NVIC_InitStructure);
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//! USART2 初始化设置
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//! 串口波特率配置
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USART_InitStructure.USART_BaudRate = bound;
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//! 8位数据长度数据格式
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USART_InitStructure.USART_WordLength = USART_WordLength_8b;
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//! 1位停止位
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USART_InitStructure.USART_StopBits = USART_StopBits_1;
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//! 无奇偶效验位
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USART_InitStructure.USART_Parity = USART_Parity_No;
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//! 无硬件数据流控制
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USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
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//! 收发模式
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USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;
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//! 初始化串口2
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USART_Init(USART2, &USART_InitStructure);
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//! 清除串口2中断标志
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USART_ClearFlag(USART2,USART_FLAG_TC);
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//! 使能中断
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USART_ITConfig(USART2, USART_IT_RXNE, ENABLE);
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//! 使能串口
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USART_Cmd(USART2, ENABLE);
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}
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//********************************************************************//
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//! 函数名:USART2_IRQHandler
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//! 功能:串口2中断服务函数,pm2.5数据接收
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//! 输入:none
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//! 输出:none
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//********************************************************************//
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void USART2_IRQHandler(void)
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{
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u8 temp;
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if(USART_GetITStatus(USART2, USART_IT_RXNE)==SET)
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{
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temp=USART_ReceiveData(USART2);
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//! 帧头0xff;(数据有接收出错的风险)
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if((temp==0XFF)||(number_USART2>0))
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{
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USART2_RX_BUF[number_USART2++]=temp;
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{
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//! 一帧数据9字节
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if(number_USART2==9)
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{
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USART2_RX_STA=1;
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number_USART2=0;
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}
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}
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}
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}
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}
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//********************************************************************//
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//! 函数名:uart3_init
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//! 功能:串口3初始化;
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//! 输入:none
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//! 输出:none
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//********************************************************************//
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void uart3_init(u32 bound)
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{
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//! GPIO初始化结构体
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GPIO_InitTypeDef GPIO_InitStructure;
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USART_InitTypeDef USART_InitStructure;
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NVIC_InitTypeDef NVIC_InitStructure;
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//! 开启GPIOB和USART3时钟
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RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB, ENABLE);
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RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART3, ENABLE);
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//! USART3_TX GPIOB.10
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GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10;
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GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
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GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
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GPIO_Init(GPIOB, &GPIO_InitStructure);
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//! USART3_RX GPIOB.11
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GPIO_InitStructure.GPIO_Pin = GPIO_Pin_11;
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GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
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GPIO_Init(GPIOB, &GPIO_InitStructure);
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//! Usart3 NVIC 中断优先级配置
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NVIC_InitStructure.NVIC_IRQChannel = USART3_IRQn;
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//! 抢占优先级1
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NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority=1 ;
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//! 子优先级2
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NVIC_InitStructure.NVIC_IRQChannelSubPriority = 2;
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//! IRQ通道使能
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NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
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//! 根据指定参数初始化VIC寄存器
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NVIC_Init(&NVIC_InitStructure);
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//! USART3初始化
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//! 波特率配置
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USART_InitStructure.USART_BaudRate = bound;
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//! 8位数据长度格式
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USART_InitStructure.USART_WordLength = USART_WordLength_8b;
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//! 停止位1位
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USART_InitStructure.USART_StopBits = USART_StopBits_1;
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//! 无奇偶校验位
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USART_InitStructure.USART_Parity = USART_Parity_No;
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//! 无硬件数据流控制
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USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
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//! 收发模式
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USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;
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//! 初始化串口3
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USART_Init(USART3, &USART_InitStructure);
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//! 清除串口3中断标志
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USART_ClearFlag(USART3,USART_FLAG_TC);
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//! 开启串口3接收中断
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USART_ITConfig(USART3, USART_IT_RXNE, ENABLE);
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//! 使能串口3
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USART_Cmd(USART3, ENABLE);
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}
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//********************************************************************//
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//! 函数名:USART3_IRQHandler
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//! 功能:串口3中断服务函数;
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//! 输入:none
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//! 输出:none
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//********************************************************************//
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void USART3_IRQHandler(void)
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{
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u8 Res=0;
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if(USART_GetITStatus(USART3, USART_IT_RXNE)==SET)
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{
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Res=USART_ReceiveData(USART3);
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if((Res=='{')||(number_USART3>0))
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{
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//! 读取数据到buffer
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USART3_RX_BUF[number_USART3++] =Res;
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//! 数据长度小于75字节并且以"}"结束,所以使用"}"判断数据是否接收完毕
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if((Res=='}')||(number_USART3==75))
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{
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USART3_RX_STA=1;
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number_USART3=0;
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}
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}
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}
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}
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