167 lines
4.7 KiB
C
167 lines
4.7 KiB
C
#include "usart2.h"
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#include "stdio.h"
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#include "string.h"
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#include "pbdata.h"
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#include "stdarg.h"
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//串口接收缓存区
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u8 USART2_RX_BUF[USART2_MAX_RECV_LEN]; //接收缓冲,最大USART2_MAX_RECV_LEN个字节.
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u8 USART2_TX_BUF[USART2_MAX_SEND_LEN]; //发送缓冲,最大USART2_MAX_SEND_LEN字节
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vu16 USART2_RX_STA=0;
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//清空数组
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void USART2_ReceiveBuff_Clear(void)
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{
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USART2_RX_STA=0;
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memset(USART2_RX_BUF,0,USART2_MAX_RECV_LEN);
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}
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//串口2配置函数
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void USART2_Configuration(u32 baund)
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{
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USART_InitTypeDef USART_InitStructure;
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GPIO_InitTypeDef GPIO_InitStructure;
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NVIC_InitTypeDef NVIC_InitStructure;
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RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART2, ENABLE); //使能USART2
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RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOA, ENABLE); //GPIOB时钟
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//NVIC_Configuration();
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USART_DeInit(USART2); //复位串口1
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//USART2_TX PB.10 PB.11
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GPIO_InitStructure.GPIO_Pin = GPIO_Pin_2 | GPIO_Pin_3;
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GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
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GPIO_InitStructure.GPIO_Speed = GPIO_Speed_10MHz;
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GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
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GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;
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GPIO_Init(GPIOA, &GPIO_InitStructure);
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GPIO_PinAFConfig(GPIOA, GPIO_PinSource2, GPIO_AF_USART2);
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GPIO_PinAFConfig(GPIOA, GPIO_PinSource3, GPIO_AF_USART2);
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USART_InitStructure.USART_BaudRate = baund;
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USART_InitStructure.USART_WordLength = USART_WordLength_8b;
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USART_InitStructure.USART_StopBits = USART_StopBits_1;
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USART_InitStructure.USART_Parity = USART_Parity_No;
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USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
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USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;
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USART_Init(USART2,&USART_InitStructure);
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USART_Cmd(USART2,ENABLE);
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USART_ITConfig(USART2,USART_IT_RXNE,ENABLE);//开启USART2的接收中断
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//Usart1 NVIC 配置
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NVIC_InitStructure.NVIC_IRQChannel = USART2_IRQn;//串口3中断通道
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NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority=3;//抢占优先级3
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NVIC_InitStructure.NVIC_IRQChannelSubPriority =0; //子优先级3
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NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; //IRQ通道使能
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NVIC_Init(&NVIC_InitStructure); //根据指定的参数初始化VIC寄存器、
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USART_ClearFlag(USART2,USART_FLAG_TC); //清除发送完成标志位
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}
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//串口2,printf 函数
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//确保一次发送数据不超过USART2_MAX_SEND_LEN字节
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void u2_printf(char* fmt,...)
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{
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u16 i,j;
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va_list ap;
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USART2_ReceiveBuff_Clear();
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va_start(ap,fmt);
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vsprintf((char*)USART2_TX_BUF,fmt,ap);
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va_end(ap);
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i=strlen((const char*)USART2_TX_BUF); //此次发送数据的长度
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for(j=0;j<i;j++) //循环发送数据
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{
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while(USART_GetFlagStatus(USART2,USART_FLAG_TC)==RESET); //循环发送,直到发送完毕
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USART_SendData(USART2,USART2_TX_BUF[j]);
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}
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}
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void timer2_init(void)
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{
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TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
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NVIC_InitTypeDef NVIC_InitStructure;
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RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2, ENABLE);
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TIM_TimeBaseStructure.TIM_Period = 999;
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TIM_TimeBaseStructure.TIM_Prescaler = 3199;
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TIM_TimeBaseStructure.TIM_ClockDivision = 1;
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TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
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TIM_TimeBaseInit(TIM2, &TIM_TimeBaseStructure);
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/* TIM IT enable */
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TIM_ITConfig(TIM2,TIM_IT_Update, ENABLE);
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TIM_ClearITPendingBit(TIM2, TIM_IT_Update);
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/* TIM2 enable counter */
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TIM_Cmd(TIM2, DISABLE);
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/* Enable the TIM2 Interrupt */
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NVIC_InitStructure.NVIC_IRQChannel = TIM2_IRQn;
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NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1;
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NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
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NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
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NVIC_Init(&NVIC_InitStructure);
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TIM_Cmd(TIM2, ENABLE); //使能TIMx
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}
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//设置TIM2的开关
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//sta:0，关闭;1,开启;
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void TIM2_Set(unsigned char sta)
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{
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if(sta)
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{
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TIM_SetCounter(TIM2,0);//计数器清空
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TIM_Cmd(TIM2, ENABLE); //使能TIMx
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}else TIM_Cmd(TIM2, DISABLE);//关闭定时器2
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}
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/**
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* @brief This function handles TIM2 global interrupt request.
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* @param None
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* @retval None
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*/
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void TIM2_IRQHandler(void)
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{
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if (TIM_GetITStatus(TIM2, TIM_IT_Update) != RESET)
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{
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TIM_ClearITPendingBit(TIM2, TIM_IT_Update);
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WKUP_PIN_Status=Key_Scan();
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}
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}
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//串口2中断服务函数
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void USART2_IRQHandler(void)
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{
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u8 res;
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if(USART_GetITStatus(USART2, USART_IT_RXNE) != RESET)//接收到数据
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{
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res =USART_ReceiveData(USART2);
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if((USART2_RX_STA&(1<<15))==0)//接收完的一批数据,还没有被处理,则不再接收其他数据
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{
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if(USART2_RX_STA<(USART2_MAX_RECV_LEN-1)) //还可以接收数据
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{
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// TIM_SetCounter(TIM2,0);//计数器清空 //计数器清空
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// if(USART2_RX_STA==0) //使能定时器7的中断
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// {
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// TIM_Cmd(TIM2,ENABLE);//使能定时器7
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// }
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USART2_RX_BUF[USART2_RX_STA++]=res; //记录接收到的值
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}else
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{
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USART2_RX_STA|=1<<15; //强制标记接收完成
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}
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}
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}
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}
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