C51 COMPILER V9.60.0.0   UART                                                              03/28/2026 16:50:46 PAGE 1   


C51 COMPILER V9.60.0.0, COMPILATION OF MODULE UART
OBJECT MODULE PLACED IN .\hex\uart.obj
COMPILER INVOKED BY: C:\keil5\C51\BIN\C51.EXE Library\Sources\uart.c OMF2 OPTIMIZE(9,SIZE) BROWSE DEBUG PRINT(.\lst\uart
                    -.lst) TABS(2) OBJECT(.\hex\uart.obj)

line level    source

   1          #ifndef _UART_C_
   2          #define _UART_C_
   3          #include "ca51f5_config.h"
   4          #include "../../includes/ca51f5sfr.h"
   5          #include "../../includes/ca51f5xsfr.h"
   6          #include "../../includes/gpiodef_f5.h"
   7          #include "../../includes/system.h"
   8          
   9          #include "../../Library/includes/uart.h"
  10          #include <intrins.h>
  11          #include <string.h>
  12          #include <stdarg.h>
  13          #include <stdlib.h>
  14          #include <stdio.h>
  15          #include <absacc.h>
  16          /*********************************************************************************************************
             -************/
  17          /*********************************************************************************************************
             -************/
  18          #ifdef UART0_EN
              /*********************************************************************************************************
             -************
              注意：以下波特率配置参数前提条件是系统时钟为16MHz，如果修改系统时钟频率，波特率配置参数须另行计算。
              **********************************************************************************************************
             -*************/
              void Uart0_Initial(unsigned long int baudrate)
              {
                code unsigned long int BR_TAB[]=
                {
                  1200,
                  2400,
                  4800,
                  9600,
                  19200,
                  38400,
                  57600,
                  115200,
                };
                code unsigned int BR_SET_TAB[][2]=
                {
                  {416,31},
                  {208,31},
                  {104,31},
                  {52,31},
                  {26,31},
                  {13,31},
                  {10,27},
                  {5,27},
                };
                unsigned int value_temp;
                unsigned char i;
                
                uart0_send.head = 0;
                uart0_send.tail = 0;
C51 COMPILER V9.60.0.0   UART                                                              03/28/2026 16:50:46 PAGE 2   

                uart0_rev.head = 0;
                uart0_rev.tail = 0;
                uart0_tx_flag = 0;
                
                GPIO_Init(P31F,P31_UART0_RX_SETTING);
                GPIO_Init(P30F,P30_UART0_TX_SETTING);
                
                for(i=0;i<sizeof(BR_TAB)/4;i++)
                {
                  if(baudrate == BR_TAB[i])
                  {
                    value_temp = 0x10000 - BR_SET_TAB[i][0];
                    UDCKS = 0x80 | BR_SET_TAB[i][1]; 
                    break;
                  }
                }
                if(i == sizeof(BR_TAB)/4) return; //如果所设置的波特率不在表格中，可自行添加。
                
                T2CON =   0x24;
                T2CH  =   (unsigned char)(value_temp>>8);
                T2CL  =   (unsigned char)(value_temp);
                TH2   =   (unsigned char)(value_temp>>8);
                TL2   =   (unsigned char)(value_temp);; 
                TR2   =   1;
              
                S0CON = 0x50;  
                ES0 = 1;
              }
              void Uart0_PutChar(unsigned char bdat)
              {
                unsigned char free_space;
                unsigned char tail_tmp;
                while(1)
                {       
                  tail_tmp = uart0_send.tail; 
                  if(uart0_send.head < tail_tmp)
                  {
                    free_space = tail_tmp - uart0_send.head;
                  }
                  else
                  {
                    free_space = UART0_TX_BUF_SIZE + tail_tmp - uart0_send.head;
                  }   
                  if(free_space > 1)
                  {
                    ES0 = 0; 
                    uart0_send.head++;
                    uart0_send.head %= UART0_TX_BUF_SIZE;
                    uart0_tx_buf[uart0_send.head] = bdat;     
                    if(!uart0_tx_flag)
                    {
                      ES0 = 1;        
                      uart0_send.tail++;
                      uart0_send.tail %= UART0_TX_BUF_SIZE;   
                      S0BUF=uart0_tx_buf[uart0_send.tail];        
                      uart0_tx_flag = 1;    
                    }
                    else
                    {
                      ES0 = 1;  
                    }     
                    break;
C51 COMPILER V9.60.0.0   UART                                                              03/28/2026 16:50:46 PAGE 3   

                  }
                }
              }
              void UART0_RX_ISR (void)
              {
                RI0 = 0;
                uart0_rev.head++;
                uart0_rev.head %= UART0_RX_BUF_SIZE;
                uart0_rx_buf[uart0_rev.head]=S0BUF;
              }
              void UART0_TX_ISR (void)
              {
                TI0 = 0;    
                if(uart0_send.head!=uart0_send.tail)
                {
                  uart0_send.tail++;
                  uart0_send.tail %= UART0_TX_BUF_SIZE;
                  S0BUF=uart0_tx_buf[uart0_send.tail];        
                }
                else
                {
                  uart0_tx_flag=0;
                }   
              }
              #endif
 138          /*********************************************************************************************************
             -************/
 139          #endif


MODULE INFORMATION:   STATIC OVERLAYABLE
   CODE SIZE        =   ----    ----
   CONSTANT SIZE    =   ----    ----
   XDATA SIZE       =   ----    ----
   PDATA SIZE       =   ----    ----
   DATA SIZE        =   ----    ----
   IDATA SIZE       =   ----    ----
   BIT SIZE         =   ----    ----
   EDATA SIZE       =   ----    ----
   HDATA SIZE       =   ----    ----
   XDATA CONST SIZE =   ----    ----
   FAR CONST SIZE   =   ----    ----
END OF MODULE INFORMATION.


C51 COMPILATION COMPLETE.  0 WARNING(S),  0 ERROR(S)