4_20ma_main.lst

PIC18F6720写DAC7612U,TA1604_LCD显示,I2C读写PCF8563,PIC单片机之间模拟I2C通讯,该软件已调试通过,已经在产品上使用,有中文说明.

021C:  GOTO   0218
....................  while( input(slave_I2C_clk) ); //等待slave_I2C_clk变为0;  
0220:  BSF    F93.2
0222:  BTFSC  F81.2
0224:  GOTO   0220
....................                                 //上面两句是等待一个移位时钟到到来  
....................  bit_set(*0xF93,1); //端口B的方向寄存器地址为0xF93,将RB1设置为输入  
0228:  BSF    F93.1
....................  bit_set(*0xF93,2); //端口B的方向寄存器地址为0xF93,将RB2设置为输入  
022A:  BSF    F93.2
.................... }  
022C:  RETLW  00
....................   
....................   
....................   
....................   
.................... /*  
.................... #INT_EXT1  
.................... void ext_int1_service()  
.................... {  
....................   BYTE j,SLAVE_address;  
....................   int1 receive_ok;  
....................   char receive_temp[5]; //用来存放接收到的数据,以ASCII格式存放  
....................   if( input(slave_I2C_clk))  //若slave_I2C_clk=1时,在slave_I2C_data脚出现下降沿,表示I2C起动条件满足,则执行下面语句  
....................     {disable_interrupts(INT_EXT1);//不使能外部中断1  
....................      if( wait_I2C_clk_low() )     //等待slave_I2C_clk变为0  
....................        {  
....................         if( wait_I2C_clk_high() )    //等待slave_I2C_clk变高;若slave_I2C_clk=1,表示开始有数据移进来  
....................           {SLAVE_address=read_IIC_byte(); //读到一个字节;  
....................            if(SLAVE_address==0xaa)  //若地址相符合,则执行下面语句  
....................              {  
....................               if( wait_I2C_clk_low() )     //等待slave_I2C_clk变为0  
....................                 {output_low(slave_I2C_data);//在slave_I2C_clk变为0时,本从机发送应答ACK;  
....................                  if( wait_I2C_clk_high() )  //等待主机将应答ACK信号取走  
....................                    {if( wait_I2C_clk_low() )     //等待slave_I2C_clk变为0  
....................                       {  
....................                        if( wait_I2C_clk_high() ) //等待slave_I2C_clk变高;若slave_I2C_clk=1,表示开始有数据移进来  
....................                          {for(j=0;j<=4;j++)  
....................                              {receive_temp[j]=read_IIC_byte();//读到一个字节;  
....................                               if(receive_temp[j]!=0) receive_ok=1;  
....................                                 else{   
....................                                      receive_ok=0;  
....................                                      break;  
....................                                     }  
....................                              }  
....................                            if(receive_ok)  
....................                              {strcpy( receive_string_buffer,receive_temp );//将receive_temp所指内容拷贝到receive_string_buffer中;  
....................                               write_string_to_DAC7612U(receive_string_buffer,14);  //将接收到的5位ASCII码写入DAC7612U  
....................                               lcd1604_display(receive_string_buffer);              //将接收到的5位ASCII码写入LCD显示;  
....................                              }  
....................                          }  
....................                       }  
....................                    }  
....................                 }  
....................               }  
....................             }  
....................          }  
....................     enable_interrupts(INT_EXT1);//使能外部中断1  
....................     bit_set(*0xF93,1); //端口B的方向寄存器地址为0xF93,将RB1设置为输入  
....................     bit_set(*0xF93,2); //端口B的方向寄存器地址为0xF93,将RB2设置为输入     
....................     }   
.................... }  
.................... */  
....................   
....................  
.................... #include "C:\A\DAC7612U.C " 
....................  #ifndef DAC7612U_CS  
.................... #define DAC7612U_SCLK  PIN_A3  
.................... #define DAC7612U_SDATA PIN_F0  
.................... #define DAC7612U_LOAD  PIN_A2  
.................... #else  
.................... #define DAC7612U_SCLK  PIN_A3  
.................... #define DAC7612U_SDATA PIN_F0  
.................... #define DAC7612U_LOAD  PIN_A2  
.................... //#define DAC7612U_CS  PIN_A2  //该脚不使用,在电路中,已经接地  
.................... #endif  
....................   
.................... #include<stdlib.h> 
....................  ///////////////////////////////////////////////////////////////////////////  
.................... ////        (C) Copyright 1996,2003 Custom Computer Services           ////  
.................... //// This source code may only be used by licensed users of the CCS C  ////  
.................... //// compiler.  This source code may only be distributed to other      ////  
.................... //// licensed users of the CCS C compiler.  No other use, reproduction ////  
.................... //// or distribution is permitted without written permission.          ////  
.................... //// Derivative programs created using this software in object code    ////  
.................... //// form are not restricted in any way.                               ////  
.................... ///////////////////////////////////////////////////////////////////////////  
....................   
.................... #ifndef _STDLIB  
.................... #define _STDLIB  
....................   
.................... //---------------------------------------------------------------------------  
.................... // Definitions and types  
.................... //---------------------------------------------------------------------------  
....................   
.................... #ifndef RAND_MAX  
.................... #define RAND_MAX  32767    // The value of which is the maximum value  
....................                            // ... returned by the rand function  
.................... #endif  
....................   
.................... typedef struct {  
....................    signed int quot;  
....................    signed int rem;  
.................... } div_t;  
....................   
.................... typedef struct {  
....................    signed long quot;  
....................    signed long rem;  
.................... } ldiv_t;  
....................   
.................... #include <stddef.h> 
....................  ///////////////////////////////////////////////////////////////////////////  
.................... ////        (C) Copyright 1996,2003 Custom Computer Services           ////  
.................... //// This source code may only be used by licensed users of the CCS C  ////  
.................... //// compiler.  This source code may only be distributed to other      ////  
.................... //// licensed users of the CCS C compiler.  No other use, reproduction ////  
.................... //// or distribution is permitted without written permission.          ////  
.................... //// Derivative programs created using this software in object code    ////  
.................... //// form are not restricted in any way.                               ////  
.................... ///////////////////////////////////////////////////////////////////////////  
....................   
.................... #ifndef _STDDEF  
....................   
.................... #define _STDDEF  
....................   
.................... #if sizeof(int *)==1  
.................... #define ptrdiff_t int  
.................... #else  
.................... #define ptrdiff_t long  
.................... #endif  
....................   
.................... #define size_t int  
.................... #define wchar_t char  
.................... #define NULL 0  
....................   
.................... #define offsetof(s,f) (offsetofbit(s,f)/8)  
....................   
.................... #endif  
....................  
....................   
.................... //---------------------------------------------------------------------------  
.................... // String conversion functions  
.................... //---------------------------------------------------------------------------  
....................   
.................... /* Standard template: float atof(char * s)  
....................  * converts the initial portion of the string s to a float.  
....................  * returns the converted value if any, 0 otherwise  
....................  */  
.................... float atof(char * s);  
....................   
.................... /* Standard template: signed int  atoi(char * s)  
....................  * converts the initial portion of the string s to a signed int  
....................  * returns the converted value if any, 0 otherwise  
....................  */  
.................... signed int atoi(char *s);  
....................   
.................... /* Syntax: signed int32  atoi32(char * s)  
....................    converts the initial portion of the string s to a signed int32  
....................    returns the converted value if any, 0 otherwise*/  
.................... signed int32 atoi32(char *s);  
....................   
.................... /* Standard template: signed long  atol(char * s)  
....................  * converts the initial portion of the string s to a signed long  
....................  * returns the converted value if any, 0 otherwise  
....................  */  
.................... signed long atol(char *s);  
....................   
.................... /* Standard template: float strtol(char * s,char *endptr)  
....................  * converts the initial portion of the string s to a float  
....................  * returns the converted value if any, 0 otherwise  
....................  * the final string is returned in the endptr, if endptr is not null  
....................  */  
.................... float strtod(char *s,char *endptr);  
....................   
.................... /* Standard template: long strtoul(char * s,char *endptr,signed int base)  
....................  * converts the initial portion of the string s, represented as an  
....................  * integral value of radix base  to a signed long.  
....................  * Returns the converted value if any, 0 otherwise  
....................  * the final string is returned in the endptr, if endptr is not null  
....................  */  
.................... signed long strtol(char *s,char *endptr,signed int base);  
....................   
.................... /* Standard template: long strtoul(char * s,char *endptr,signed int base)  
....................  * converts the initial portion of the string s, represented as an  
....................  * integral value of radix base to a unsigned long.  
....................  * returns the converted value if any, 0 otherwise  
....................  * the final string is returned in the endptr, if endptr is not null  
....................  */  
.................... long strtoul(char *s,char *endptr,signed int base);  
....................   
.................... //---------------------------------------------------------------------------  
.................... // Pseudo-random sequence generation functions  
.................... //---------------------------------------------------------------------------  
....................   
.................... /* The rand function computes a sequence of pseudo-random integers in  
....................  * the range 0 to RAND_MAX  
....................  *  
....................  * Parameters:  
....................  *       (none)  
....................  *  
....................  * Returns:  
....................  *       The pseudo-random integer  
....................  */  
.................... long rand(void);  
....................   
.................... /* The srand function uses the argument as a seed for a new sequence of  
....................  * pseudo-random numbers to be returned by subsequent calls to rand.  
....................  *  
....................  * Parameters:  
....................  *       [in] seed: The seed value to start from. You might need to pass  
....................  *  
....................  * Returns:  
....................  *       (none)  
....................  *  
....................  * Remarks  
....................  *          The srand function sets the starting point for generating  
....................  *       a series of pseudorandom integers. To reinitialize the  
....................  *       generator, use 1 as the seed argument. Any other value for  
....................  *       seed sets the generator to a random starting point. rand  
....................  *       retrieves the pseudorandom numbers that are generated.  
....................  *       Calling rand before any call to srand generates the same  
....................  *       sequence as calling srand with seed passed as 1.  
....................  *          Usually, you need to pass a time here from outer source  
....................  *       so that the numbers will be different every time you run.  
....................  */  
.................... void srand(unsigned int32 seed);  
....................   
.................... //---------------------------------------------------------------------------  
.................... // Memory management functions  
.................... //---------------------------------------------------------------------------  
....................   
.................... // Comming soon  
....................   
.................... //---------------------------------------------------------------------------  
.................... // Communication with the environment  
.................... //---------------------------------------------------------------------------  
....................   
.................... /* The function returns 0 always  
....................  */  
.................... signed int system(char *string);  
....................   
.................... //---------------------------------------------------------------------------  
.................... // Searching and sorting utilities  
.................... //---------------------------------------------------------------------------  
....................   
.................... /* Performs a binary search of a sorted array..  
....................  *  
....................  * Parameters:  
....................  *       [in] key: Object to search for  
....................  *       [in] base: Pointer to base of search data  
....................  *       [in] num: Number of elements  
....................  *       [in] width: Width of elements  
....................  *       [in] compare: Function that compares two elements  
....................  *  
....................  * Returns:  
....................  *       bsearch returns a pointer to an occurrence of key in the array pointed  
....................  *       to by base. If key is not found, the function returns NULL. If the  
....................  *       array is not in order or contains duplicate records with identical keys,  
....................  *       the result is unpredictable.  
....................  */  
.................... //void *bsearch(const void *key, const void *base, size_t num, size_t width,  
.................... //              int (*compare)(const void *, const void *));  
....................   
.................... /* Performs the shell-metzner sort (not the quick sort algorithm). The contents  
....................  * of the array are sorted into ascending order according to a comparison  
....................  * function pointed to by compar.  
....................  *  
....................  * Parameters:  
....................  *       [in] base: Pointer to base of search data  
....................  *       [in] num: Number of elements  
....................  *       [in] width: Width of elements  
....................  *       [in] compare: Function that compares two elements  
....................  *  
....................  * Returns:  
....................  *       (none)  
....................  */  
.................... //void *qsort(const void *base, size_t num, size_t width,  
.................... //              int (*compare)(const void *, const void *));  
....................   
.................... //---------------------------------------------------------------------------  
.................... // Integer arithmetic functions  
.................... //---------------------------------------------------------------------------  
....................   
.................... #define labs abs  
....................   
.................... div_t div(signed int numer,signed int denom);  
.................... ldiv_t ldiv(signed long numer,signed long denom);  
....................   
.................... //---------------------------------------------------------------------------  
.................... // Multibyte character functions  
.................... //---------------------------------------------------------------------------  
....................   
.................... // Not supported  
....................   
.................... //---------------------------------------------------------------------------  
.................... // Multibyte string functions  
.................... //---------------------------------------------------------------------------  
....................   
.................... // Not supported  
....................   
....................   
.................... //---------------------------------------------------------------------------  
.................... // Internal implementation  
.................... //---------------------------------------------------------------------------  
....................   
.................... #include <stddef.h> 
....................  ///////////////////////////////////////////////////////////////////////////  
.................... ////        (C) Copyright 1996,2003 Custom Computer Services           ////  
.................... //// This source code may only be used by licensed users of the CCS C  ////  
.................... //// compiler.  This source code may only be distributed to other      ////