stm8系列--usart收发+遇到问题

#define _maxbuf 100

typedef struct

{

 u8 rcbuf[_maxbuf]; //MODBUS接收缓冲区

 u16 timout;//MODbus的数据断续时间    

 u8 recount;//MODbus端口已经收到的数据个数

 u8  reflag;//收到一帧数据的标志

 u8 Sendbuf[_maxbuf]; //MODbus发送缓冲区    

}MYUSART;

void main(void)

{

    Init_UART1();

    Init_Timer4();

    enableInterrupts(); 

    while (1)

    {

        if(myusart.reflag>0)

        {

            Com_Handle();//收到什么回复什么；        

            myusart.recount=0;

            myusart.reflag=0;

        }    

    }  

}

void Init_Timer4(void)

{

    TIM4_TimeBaseInit(TIM4_PRESCALER_128, 0x0f);  //1MS

  TIM4_ClearFlag(TIM4_FLAG_UPDATE);

    TIM4_ITConfig(TIM4_IT_UPDATE, ENABLE);

    TIM4_Cmd(ENABLE);

}

MYUSART myusart;

void Init_UART1(void)

{

    UART1_DeInit();

    UART1_Init((u32)9600, UART1_WORDLENGTH_8D, UART1_STOPBITS_1, UART1_PARITY_NO, UART1_SYNCMODE_CLOCK_DISABLE, UART1_MODE_TXRX_ENABLE);

    UART1_ITConfig(UART1_IT_RXNE_OR, ENABLE);

}

void UART1_SendData8_Buff(uint8_t* data,uint8_t len)

{

    uint8_t i = 0;

    for(i=0;i    {

        while(( UART1_GetFlagStatus(UART1_FLAG_TXE)==RESET));

      UART1_SendData8(data[i]);    

    }

}

void Com_Handle(void)//发送什么回复什么

{

    UART1_SendData8_Buff(myusart.rcbuf,myusart.recount);

}

 INTERRUPT_HANDLER(UART1_RX_IRQHandler, 18)

 {

    /* In order to detect unexpected events during development,

       it is recommended to set a breakpoint on the following instruction.

    */

#if 1

        if( myusart.reflag==0)

        {

            myusart.timout=10;

            if(myusart.recount<_maxbuf)

            {

                myusart.rcbuf[myusart.recount++]=UART1_ReceiveData8();

            }

        }

#endif

        UART1_ClearITPendingBit(UART1_IT_RXNE);

 }

int time_i=0;

 INTERRUPT_HANDLER(TIM4_UPD_OVF_IRQHandler, 23)

{

  /* In order to detect unexpected events during development,

     it is recommended to set a breakpoint on the following instruction.

  */

    #if 1

    if(myusart.timout>0)

    {

        if(--myusart.timout==0)

        {

            myusart.reflag=1; //收到一帧数据

        }

    }

    #endif

    time_i++;

    if(time_i>=300)

    {

        time_i=0;

        flag_send=1;

    }

    //300MS

    TIM4_ClearITPendingBit(TIM4_IT_UPDATE);

}

 https://blog.csdn.net/taoynkkx/article/details/46821953?spm=1001.2101.3001.6650.5&utm_medium=distribute.pc_relevant.none-task-blog-2%7Edefault%7EBlogOpenSearchComplete%7ERate-5-46821953-blog-71158962.235%5Ev43%5Epc_blog_bottom_relevance_base8&depth_1-utm_source=distribute.pc_relevant.none-task-blog-2%7Edefault%7EBlogOpenSearchComplete%7ERate-5-46821953-blog-71158962.235%5Ev43%5Epc_blog_bottom_relevance_base8&utm_relevant_index=10