Analysis of serial port data stream

Data flow analysis begins with the interruption of the serial port

/* Receive one BYTE */@far @interrupt void uart2rx_interrupt (void)
{
U8 byte;


if (UART2->SR & Uart2_flag_rxne)
{
byte = uart2->sr;
byte = Uart2_receivedata8 ();
if (Uart_chn_rx_byte (byte))
{
Uart_rx_hook ();
}
}

}

The Uart_rx_hook () was triggered in the serial interrupt;

void Uart_rx_hook (void)
{
uart_file_infor[0].busy_rxing = Uart_char_max_delay;
Notify (Ev_rxchar);
}

Scan_uart_opt (void *args) triggered in the hook function of the serial interrupt

void scan_uart_opt (void *args)
{
struct Shs_frame *pframe;
Uint8 Idx,len;

IDX = Sys_uart_peek_data (g_frame_buffer, sizeof (G_frame_buffer));


Pframe = Get_smart_frame (G_FRAME_BUFFER,IDX);


if (NULL = = pframe) return;


IDX = (uint8 *) Pframe-g_frame_buffer;
Len = pframe->length+shs_frame_head+1;
Clear_uart (idx + len);
Memmove_my (&g_frame_buffer[0], &g_frame_buffer[idx], Len);
Pframe = (struct shs_frame *) G_frame_buffer;
Added 2-hour non-communication reset carrier chip function
Clear_rst_time (pframe);


Plc_machine_opt (pframe); Protocol handle (Buffer[i] is a complete frame data)
}

Don't understand ....
void plc_machine_opt (void *args)
{
struct Plc_state *pstate = plc_state.pstate;
Uint8 Init;


init = Plc_state.init;
if (init) plc_state.wait_t=0;
Plc_state.init = 0;
if (NULL! = pstate)
{
Pstate->action (init, args);//Where is the meaning of this sentence ....
}
}

void task_100ms (void *args)
{
    notify (ev_state);//start state_machine
    Uart_tick_ Hook ();
   //learning_wave ();  
    Emitt_wave ();
} The function of

is primarily to solve the problem of timeouts
void Uart_tick_hook (void)
{   
    if (uart_file_infor[0].busy_ Rxing  > 0x00)
    {
        uart_file_infor[0].busy_rxing--;
  &NB Sp     if (0x00 = = uart_file_infor[0].busy_rxing)
        {
            Empty_a_chn_slot (& (Uart_file_infor[0].rx_slot));
       }
   }
}