串口1是RS485通信，使用收发中断，当我上位机发送数据到串口1后，一会儿就使其他设备都不工作

漆黑丨夜 · 发表于 2016-1-26 17:42:28

问题补充：芯片stm32f103zet6,当我从上位机发送启动命令到板子后，板子成功接收到数据并显示在屏上，但是10几秒后，我的其他串口都不工作，串口1的接收端的led灯会一闪一闪，点击串口屏也没反应。但是我在调试状态运行程序时，并没有这样的情况出现，调试状态下运行不会卡死。
求大神们提点一下意见，到底是哪除了问题？

#define RS485_send1()             GPIOA->ODR |= (1<<8)
#define RS485_receive1()    GPIOA->ODR &=~(1<<8)

//串口1初始化
void InitUART1(unsigned long pclk2,unsigned long bound)
{
float temp;
unsigned short mantissa;
unsigned short fraction;
temp = (float)(pclk2*1000000)/(bound*16); //得到UARTDIV
mantissa = temp;                //得到整数部分
fraction = (temp-mantissa)*16; //得到小数部分
mantissa<<=4;
mantissa += fraction;
RCC->APB2ENR |= (1<<2); //使能GPIOA时钟
RCC->APB2ENR |= (1<<14); //使能串口1时钟
GPIOA->CRH &= 0xFFFFF00F; //PA9、PA10清零
GPIOA->CRH |= 0x000008b0; //1000(上下拉输入) 1011(复用推挽输出，50MHz)
RCC->APB2RSTR |= 1<<14; //复位串口1
RCC->APB2RSTR &=~(1<<14); //停止复位
//波特率设置
USART1->BRR = mantissa;
USART1->CR1 |= 0x200C; //1位停止，无校验

USART1->CR1 |= 1<<8;
MY_NVIC_Init(2,0,USART1_IRQChannel,2);//中断初始化，组2
Uart1_RS485_Receive();
}

//串口1配置为485接收
void Uart1_RS485_Receive(void) //接收
{
RS485_receive1();//485CTL1置为低电平
__nop();
__nop();
__nop();
USART1->CR1 &=~(BIT(7)|BIT(3)); //发送禁止，发送中断禁止
USART1->CR1 |= (BIT(5)|BIT(2)); //接收使能，接收中断使能
USART1->SR &=~(BIT(5)); //清除接收标志位
}

//串口1配置为485发送
void Uart1_RS485_Send(void)    //发送
{
RS485_send1(); //485CTL0置为高电平
__nop();
__nop();
__nop();
USART1->CR1 &=~(BIT(5)|BIT(2)); //接收禁止，接收中断禁止
USART1->CR1 |= (BIT(7)|BIT(3)); //发送使能，发送中断使能
}

//发送数据
void uSendData_UART1(void)
{
tUart1.uSendTail = 0;
_delay_us(10);
tUart1.uComStateflag = 0x10;//设置为发送状态
if ((tUart1.uFuncID == REC_ORDER_APCODATA_M)||(tUart1.uFuncID == REC_ORDER_APCODATA_S))
{
tUart1.uSendBuf = 22;
}
else
{
tUart1.uSendBuf = common_conf.p_conf_equipment.b_equipment_number;
}
tagged_word.checksum = 0;
tagged_word.checksum += tUart1.uSendBuf;
USART1->DR = tUart1.uSendBuf;tUart1.uSendTail++;
Uart1_RS485_Send();
}

//串口1中断服务函数
void USART1_IRQHandler(void)
{
/////////////接收中断
unsigned char cRead;
if(USART1->SR&(1<<5)) //接收到数据
{
cRead = USART1->DR;
if (tUart1.uComStateflag == 0x21)//接收数据状态
{
if (tUart1.uRecTimer15 >= 120)
{
tUart1.uRecTimeout15flag = 1;
}
if (tUart1.uRecTop <= 0xFFFF)
{
tUart1.uRecBuf[tUart1.uRecTop++] = cRead;
}
}
else
{
if (tUart1.uComStateflag == 0x00)
{
tUart1.uLead_bytes[tUart1.uLead_byte] = cRead;
if (tUart1.uLead_byte == 6)
{
tUart1.uLead_byte = 0;
tUart1.uComStateflag = 0x20;
if (cRead == common_conf.p_conf_equipment.b_equipment_number)
{
tUart1.uRecOrderTimer = 0;
p_global_variable.upper_online_flag = 1;//联机状态

tUart1.uResponseTimer = 0;//响应超时计时器清零
tUart1.uComStateflag = 0x21;//通讯状态设置为接收数据状态
tUart1.uRecTop = 0;
tUart1.uRecBuf[tUart1.uRecTop++] = cRead;
CRC_Result[0] = Cal_CRC16(cRead,0xFFFF);
}
}
else if ((tUart1.uLead_byte%2) == 0)
{
if (cRead == 0xAA)
{
tUart1.uLead_byte++;
}
}
else if ((tUart1.uLead_byte%2) == 1)
{
if (cRead == 0x55)
{
tUart1.uLead_byte++;
}
}

}
}
tUart1.uRecTimer15 = 0;
tUart1.uRecTimer35 = 0;
}
//////////发送中断
if((USART1->SR&(1<<7))&&(GPIOA->ODR&(1<<8))) //发送数据寄存器为空&&RS485的DE/RE脚为高电平
{
_delay_us(20);
if (tUart1.uSendTail < tUart1.uSendTop)
{
response_datas();//响应数据处理
USART1->DR = tUart1.uSendBuf;
tUart1.uSendTail++;
}
else
{
USART1->CR1 &=~(1<<7);
tUart1.uLead_byte = 0;
tUart1.uSendTail = 0;
tUart1.uSendTop  = 0;
tUart1.uComStateflag = 0x11;//通讯状态设置为发送完成状态
tUart1.uResponseTimer = 0;//响应超时计时器清零
Uart1_RS485_Receive(); //开启485接收中断
}
}
}

//定时器3中断，100us中断一次
void TIM3_IRQHandler(void)
{
if(TIM3->SR&0X0001)//溢出中断
{
//TIM3中断执行程序
u_1msTimer1++;
if (u_1msTimer1 >= 10)//1ms
{
u_1msTimer1 = 0;

if (tUart1.uComStateflag == 0x11)//发送完成状态
{
if ((tUart1.uResponse_flag == 1)&&(p_global_variable.machine_state_flag == FLAG_STATE_FINISH))
{
tUart1.uResponse_flag = 2;//完成截止数据上传
}
else if ((tUart1.uResponse_flag == 2)&&(p_global_variable.machine_state_flag == FLAG_STATE_FINISH))
{
tUart1.uResponse_flag = 3;//完成截止数据上传
tUart1.uResponse_succeed_Timer = 0;//发送成功计时
}
tUart1.uComStateflag = 0x00;//通讯状态设置为空闲状态
}
if (tUart1.uComStateflag == 0x22)//接收完成状态
{
tUart1.uResponseTimer++;//响应超时计时
if (tUart1.uResponseTimer >= 500)//响应超时500ms
{
tUart1.uResponseTimer = 0;//响应超时计时器清零
tUart1.uComStateflag  = 0x00;//通讯状态设置为响应超时
}
}
if (tUart1.uComStateflag == 0x00)//通讯空闲状态
{
if ((tUart1.uResponse_flag == 3)&&(p_global_variable.machine_state_flag == FLAG_STATE_FINISH))
{
tUart1.uResponse_succeed_Timer++;
if (tUart1.uResponse_succeed_Timer >= 2000)
{
tUart1.uResponse_succeed_Timer = 0;//发送成功计时
tUart1.uResponse_flag = 4;//完成截止数据上传
}
}
}
}

if (tUart1.uComStateflag == 0x00)
{
Uart1_RS485_Receive(); //接收
}

if ((tUart1.uComStateflag == 0x20)||(tUart1.uComStateflag == 0x21))//接收状态或者接收数据状态
{
tUart1.uRecTimer15++;
tUart1.uRecTimer35++;
if (tUart1.uRecTimer35 >= 50)
{
if (tUart1.uComStateflag == 0x20)//若不是目标从机则数据帧结束后直接转到待机状态0x00
{
tUart1.uComStateflag = 0x00;
}
if (tUart1.uComStateflag == 0x21)//若是目标从机则数据帧结束后转到接收数据完成状态0x22
{
tUart1.uComStateflag = 0x22;
//tUart1.uCRC_Result = CRC_Result[2];
Upper_Event();//上位机事件
}
tUart1.uRecTimer15 = 0;
tUart1.uRecTimer35 = 0;
}
}
}
TIM3->SR&=~(1<<0);//清除中断标志位
}