STC32G 单片机EEPROM 操作实例_办公生活

STC32G 单片机EEPROM 操作实例

创始人

2024-02-18 03:14:28

一 STC32G 单片机EEPROM简介

STC32G系列单片机内部集成了大量的EEPROM，特别是STC32G12K128集成多达128K EEPROM。

STC32G内部EEPROM可擦写10万次，分若干扇区，每个扇区512字节。EEPROM的写操作只能将1写为0。要将0写为1，必须擦除扇区。EEPROM的读写是以字节为单位，擦除是以扇区为单位进行，要修改扇区内容，需要先将整个扇区内容读入内存，然后擦除整个扇区，然后再将内容写入扇区。STC32G的EEPROM操作时间与系统频率相关，设置好IAP_TPS寄存器值后，操作所需时间由硬件自动控制，IAP_TPS寄存器值 = 系统频率 / 1000000，如系统频率是30MHz，IAP_TPS寄存器值设为30.

与EEPROM相关的寄存器如下：

STC32G12K128的数据寄存器，仅IAP_DATA有效。

操作EEPROM的命令如下：

STC32G系列单片机仅支持命令CMD0~CMD3.

要操作STC32G EEPROM必须将IAP_CONTR寄存器的IAPEN设为1.在设置完操作地址与操心命令后必须分别向IAP_TRIG分别写入0x5A、0xA5，才能使命令生效。

二与STC32G 单片机EEPROM 操作相关库函数的编写

EEPROM 的操作离不开操作与EEPROM相关的寄存器，如果不写相关的库函数，每次都直接去写操作寄存器的代码，非常麻烦，且工作量大，我们先写好库函数，后面要用时，调用即可，就会省去很多麻烦，提高效率。下面是我写的库函数。先看下头文件。

/*STC32G_EEPROM.hDesigned by Bill LiuVersion 0.0 Modified last by Bill Liu on 07/18/2022
//macro function/
IAP_STANDBY(); 																					//idle,no operation command
IAP_READ();																							//read command
IAP_WRITE();																						//write command
IAP_ERASE();																						//erase section command
IAP_ENABLE();																						//IAP operation enable
IAP_DISABLE();																					//IAP operation disable//Function
EEPROM_Disable();																			 									//Set eeprom operating disable, return void
EEPROM_Trig();																				 									//set INT state,then send eeprom operating trigger signal, resore INT state,return void
EEPROM_SectorErase(u32 EE_address);                    									//erase EEPROM section, return void
EEPROM_Read_nChar(ui32 EE_address,ui8* destData, u16 number);						//read n char from eeprom begine from EE_address,return void
EEPROM_Write_nChar(u32 EE_address,ui8* sourceData,u16 number);				  //write n char to eeprom begine from EE_address, return void
EEPROM_Write_Integer(u32 EE_address,i16 sourceData);										//write integer to eeprom begine from EE_address, return void	
EEPROM_Write_Long(u32 EE_address,i32 sourceData);												//write long to eeprom begine from EE_address, return void	
EEPROM_Write_Float(u32 EE_address,f32 sourceData);											//write float to eeprom begine from EE_address,return void	
EEPROM_Write_Double(u32 EE_address,f64 sourceData);											//write double to eeprom begine from EE_address,return void	
EEPROM_Write_String(u32 EE_address,char* sourceStr);										//read string from eeprom begine from EE_address, return void
EEPROM_Read_Integer(u32 EE_address,i16* destData);											//read integer from eeprom begine from EE_address,return i16
EEPROM_Read_Long(u32 EE_address,i32* destData);													//read long from eeprom begine from EE_address, return i32
EEPROM_Read_Float(u32 EE_address,f32* destData);												//ead float from eeprom begine from EE_address,return f32
EEPROM_Read_Double(u32 EE_address,f64* destData);												//read double from eeprom begine from EE_address, return f64
EEPROM_Read_String(u32 EE_address,char* str);														//read string from eeprom begine from EE_address,return void
EEPROM_Read_StringnChar(u32 EE_address,char* str, ui16 number);					//read string n char from eeprom begine from EE_address, return void*/#ifndef	__STC32G_EEPROM_H
#define	__STC32G_EEPROM_H#include	"config.h"
#include "mtype.h"
#include #define		IAP_STANDBY()	{IAP_CMD = 0x00;}		//idle,no operation command
#define		IAP_READ()		{IAP_CMD = 0x01;}		//read command
#define		IAP_WRITE()		{IAP_CMD = 0x02;}		//write command
#define		IAP_ERASE()		{IAP_CMD = 0x03;}		//erase section command
#define	IAP_ENABLE()		{IAPEN = 1; IAP_TPS = FOSC / 1000000;}     //FOSC defined in  config.h
#define	IAP_DISABLE()		{IAP_CONTR = 0; IAP_CMD = 0; IAP_TRIG = 0; IAP_ADDRH = 0xFF; IAP_ADDRL = 0xFF;}/*********************************************************
Function: EEPROM_Disable();
Return value: void
Discription: Set eeprom operating disable
Example:EEPROM_Disable();  
*********************************************************/
void	EEPROM_Disable();/****************************************************************
Function: EEPROM_Trig();
Return value: void
Discription: set INT state,then send eeprom operating trigger signal, resore INT state
Example:EEPROM_Trig(); 
****************************************************************/
void EEPROM_Trig();/*********************************************************
Function: 	EEPROM_SectorErase(u32 EE_address);
Return value: void
EE_address: eeprom address
Discription: erase EE_address eeprom section  
Example:EEPROM_SectorErase(0x90F);
*********************************************************/
void	EEPROM_SectorErase(u32 EE_address);/*********************************************************
Function: 	EEPROM_Write_nChar(u32 EE_address,ui8* sourceData,u16 number);
Return value: void
EE_address: eeprom address
sourceData: char arry name to write to eeprom
Discription: write n char to eeprom begine from EE_address
Example:EEPROM_Write_nChar(0x90F,mCharArray, 30);
*********************************************************/
void 	EEPROM_Write_nChar(u32 EE_address,ui8* sourceData,u16 number);/*********************************************************
Function: 	EEPROM_Read_nChar(ui32 EE_address,ui8* destData, u16 number);
Return value: void
EE_address: eeprom address
destData: char arry name to store read data
Discription: read n char from eeprom begine from EE_address
Example:EEPROM_Read_nChar(0x90F,mCharArray, 30);
*********************************************************/
void 	EEPROM_Read_nChar(ui32 EE_address,ui8* destData, u16 number);/*********************************************************
Function: 	EEPROM_Write_Integer(u32 EE_address,i16 sourceData);
Return value: void
EE_address: eeprom address
sourceData: data to write to eeprom
Discription: write integer to eeprom begine from EE_address
Example:EEPROM_Write_Integer(0x90F,1600);
*********************************************************/
void 	EEPROM_Write_Integer(u32 EE_address,i16 sourceData);/*********************************************************
Function: 	EEPROM_Write_Long(u32 EE_address,i32 sourceData);
Return value: void
EE_address: eeprom address
sourceData: data to write to eeprom
Discription: write long to eeprom begine from EE_address
Example:EEPROM_Write_Long(0x90F,1600);
*********************************************************/
void 	EEPROM_Write_Long(u32 EE_address,i32 sourceData);/*********************************************************
Function: 	EEPROM_Write_Float(u32 EE_address,f32 sourceData);
Return value: void
EE_address: eeprom address
sourceData: data to write to eeprom
Discription: write float to eeprom begine from EE_address
Example:EEPROM_Write_Long(0x90F,1600.53);
*********************************************************/
void 	EEPROM_Write_Float(u32 EE_address,f32 sourceData);/*********************************************************
Function: 	EEPROM_Write_Double(u32 EE_address,f64 sourceData);
Return value: void
EE_address: eeprom address
sourceData: data to write to eeprom
Discription: write double to eeprom begine from EE_address
Example:EEPROM_Write_Double(0x90F,1600.53);
*********************************************************/
void 	EEPROM_Write_Double(u32 EE_address,f64 sourceData);/*********************************************************
Function: 	EEPROM_Write_String(u32 EE_address,char* sourceStr);
Return value: void
EE_address: eeprom address
sourceStr: string  to write to eeprom
Discription: write string to eeprom begine from EE_address
Example:EEPROM_Write_String(0x90F,"Hello world");
*********************************************************/
void 	EEPROM_Write_String(u32 EE_address,char* sourceStr);/*********************************************************
Function: 	EEPROM_Read_Integer(u32 EE_address,i16* destData);
Return value: i16
EE_address: eeprom address
destData: addess to store data to read 
Discription: read integer from eeprom begine from EE_address
Example:i16 tem;EEPROM_Read_Integer(0x90F,&tem);
*********************************************************/
i16 EEPROM_Read_Integer(u32 EE_address,i16* destData);/*********************************************************
Function: 	EEPROM_Read_Long(u32 EE_address,i32* destData);
Return value: i32
EE_address: eeprom address
destData: addess to store data to read 
Discription: read long from eeprom begine from EE_address
Example:i32 tem;EEPROM_Read_Long(0x90F,&tem);
*********************************************************/
i32 EEPROM_Read_Long(u32 EE_address,i32* destData);/*********************************************************
Function: 	EEPROM_Read_Float(u32 EE_address,f32* destData);
Return value: f32
EE_address: eeprom address
destData: addess to store data to read 
Discription: read float from eeprom begine from EE_address
Example:f32 tem;EEPROM_Read_Float(0x90F,&tem);
*********************************************************/
f32 EEPROM_Read_Float(u32 EE_address,f32* destData);/*********************************************************
Function: 	EEPROM_Read_Double(u32 EE_address,f64* destData);
Return value: f64
EE_address: eeprom address
destData: addess to store data to read 
Discription: read double from eeprom begine from EE_address
Example:f64 tem;EEPROM_Read_Double(0x90F,&tem);
*********************************************************/
f64 EEPROM_Read_Double(u32 EE_address,f64* destData);/*********************************************************
Function: 	EEPROM_Read_String(u32 EE_address,char* str);
Return value: void
EE_address: eeprom address
str: addess to store data to read
Discription: read string from eeprom begine from EE_address
Example:char str[20];EEPROM_Read_String(0x90F,str);
*********************************************************/
void EEPROM_Read_String(u32 EE_address,char* str);/*********************************************************
Function: 	EEPROM_Read_StringnChar(u32 EE_address,char* str);
Return value: void
EE_address: eeprom address
str: addess to store read data
number: number of char to read
Discription: read string n char from eeprom begine from EE_address
Example:char str[20];EEPROM_Read_StringnChar(0x90F,str, 10);
*********************************************************/
void EEPROM_Read_StringnChar(u32 EE_address,char* str, ui16 number);#endif

头文件的开头注释部分列出了定义的宏函数与函数，编程使用是直接复制粘贴，替换参数即可：

再看下库函数的源码：

/*STC32G_EEPROM.hDesigned by Bill LiuVersion 0.0 Modified last by Bill Liu on 07/18/2022
*/#include "STC32G_EEPROM.h"//****************************************************************
void EEPROM_Disable()
{IAP_CONTR = 0;			IAP_CMD   = 0;			IAP_TRIG  = 0;			IAP_ADDRE = 0xff;   //set a disable operate addrIAP_ADDRH = 0xff;   //set a disable operate addrIAP_ADDRL = 0xff;   //set a disable operate addr
}
//End of  EEPROM_Disable(void)//****************************************************************
void EEPROM_Trig()
{F0 = EA;    //save EA stateEA = 0;     //INT disableIAP_TRIG = 0x5A;IAP_TRIG = 0xA5;                    																																			_nop_();   _nop_();_nop_();_nop_();EA = F0;    //restore EA
}
//End of  EEPROM_Disable()//****************************************************************
void EEPROM_SectorErase(u32 EE_address)
{IAP_ENABLE();                       IAP_ERASE();                      IAP_ADDRL = (u8)EE_address;   IAP_ADDRH = (u8)(EE_address >> 8);  IAP_ADDRE = (u8)(EE_address >> 16); EEPROM_Trig();                      EEPROM_Disable();                   
}
//End of EEPROM_SectorErase(u32 EE_address)//****************************************************************
void EEPROM_Write_nChar(u32 EE_address,ui8* sourceData,u16 number)
{IAP_ENABLE();                       IAP_WRITE();                        do{IAP_ADDRL = (u8)EE_address;  IAP_ADDRH = (u8)(EE_address >> 8); IAP_ADDRE = (u8)(EE_address >> 16);        IAP_DATA  = *sourceData; EEPROM_Trig();  EE_address++;                   sourceData++;                    }while(--number);                  EEPROM_Disable();
}
//End of EEPROM_Write_nChar(u32 EE_address,ui8* sourceData,u16 number)//****************************************************************
void EEPROM_Read_nChar(ui32 EE_address,ui8* destData, u16 number)
{IAP_ENABLE();                          IAP_READ();                            do{IAP_ADDRL = (u8)EE_address; IAP_ADDRH = (u8)(EE_address >> 8); IAP_ADDRE = (u8)(EE_address >> 16);  EEPROM_Trig(); *destData = IAP_DATA;  EE_address++;destData++;}while(--number);EEPROM_Disable();
}
//End of EEPROM_Read_nChar(ui32 EE_address,ui8* destData, u16 number)//****************************************************************
void 	EEPROM_Write_Integer(u32 EE_address,i16 sourceData)
{typedef union {i16 mData;char arry[2];}mySoure;mySoure source;source.mData = sourceData;EEPROM_Write_nChar(EE_address,source.arry,2);
}
//End of EEPROM_Write_Integer(u32 EE_address,i16 sourceData)//****************************************************************
void 	EEPROM_Write_Long(u32 EE_address,i32 sourceData)
{typedef union {i32 mData;char arry[4];}mySoure;mySoure source;source.mData = sourceData;EEPROM_Write_nChar(EE_address,source.arry,4);
}
//End of EEPROM_Write_Long(u32 EE_address,i32 sourceData)//*************************************************************
void 	EEPROM_Write_Float(u32 EE_address,f32 sourceData)
{typedef union {f32 mData;char arry[4];}mySoure;mySoure source;source.mData = sourceData;EEPROM_Write_nChar(EE_address,source.arry,4);
}
//End of EEPROM_Write_Float(u32 EE_address,f32 sourceData)//************************************************************
void 	EEPROM_Write_Double(u32 EE_address,f64 sourceData)
{typedef union {f32 mData;char arry[8];}mySoure;mySoure source;source.mData = sourceData;EEPROM_Write_nChar(EE_address,source.arry,8);
}
//End of EEPROM_Write_Double(u32 EE_address,f64 sourceData)//***********************************************************
void 	EEPROM_Write_String(u32 EE_address,char* sourceStr)
{EEPROM_Write_nChar(EE_address,sourceStr,strlen(sourceStr));EEPROM_Write_nChar(EE_address+strlen(sourceStr),0,1);
}
//End of EEPROM_Write_String(u32 EE_address,char* sourceStr)//***********************************************************************
i16	EEPROM_Read_Integer(u32 EE_address,i16* destData)
{typedef union {i16 mData;char arry[2];}myDest;myDest dest;EEPROM_Read_nChar(EE_address,dest.arry, 2);*destData = dest.mData;return *destData;
}
//End of EEPROM_Read_Integer(u32 EE_address,i16* destData)//***********************************************************************
i32 EEPROM_Read_Long(u32 EE_address,i32* destData)
{typedef union {i32 mData;char arry[4];}myDest;myDest dest;EEPROM_Read_nChar(EE_address,dest.arry, 4);*destData = dest.mData;return *destData;
}
//End of EEPROM_Read_Long(u32 EE_address,i32* destData)//***********************************************************************
f32 EEPROM_Read_Float(u32 EE_address,f32* destData)
{typedef union {f32 mData;char arry[4];}myDest;myDest dest;EEPROM_Read_nChar(EE_address,dest.arry, 4);*destData = dest.mData;return *destData;
}
//End of EEPROM_Read_Float(u32 EE_address,f32* destData)//***********************************************************************
f64 EEPROM_Read_Double(u32 EE_address,f64* destData)
{typedef union {f64 mData;char arry[8];}myDest;myDest dest;EEPROM_Read_nChar(EE_address,dest.arry, 8);*destData = dest.mData;return *destData;
}
//End of EEPROM_Read_Double(u32 EE_address,f64* destData)//***********************************************************************
void EEPROM_Read_String(u32 EE_address,char* str)
{ui8 tem = 0xFF;memset(str,0, strlen(str));while(tem != 0){EEPROM_Read_nChar(EE_address,&tem, 1);*str = tem;str++;EE_address++;}
}
//End of EEPROM_Read_String(u32 EE_address,char* str)//***********************************************************************
void EEPROM_Read_StringnChar(u32 EE_address,char* str, ui16 number)
{memset(str,0, strlen(str));EEPROM_Read_nChar(EE_address, str, number);
}
//End of EEPROM_Read_nString(u32 EE_address,char* str, ui16 number)

三调试验证

下面写一个程序，调用库函数，先将数据写入EEPROM，然后再读出，将读出的数据通过串口发送到串口助手，显示出来从而确定其正确性。

maim.h代码：

/*main.hDesigned by Bill LiuVersion 0.0 Modified last by Bill Liu on 06/22/2022
*/#ifndef     __MAIN_H__
#define     __MAIN_H__
//#include "myport.h"
#include "STC32G_GPIO.h"
//#include "STC32G_PWM.h"
#include "STC32G_UART.h"
//#include "STC32G_UART.h"
//#include "STC32G_ADC.h"
#include "STC32G_EEPROM.H"#endif

config.h代码：

ifndef __CONFIG_H__
#define __CONFIG_H__#define PRINTF_SEGLED           //printfÊä³öÖØ¶¨Ïòµ½ISPÏÂÔØÈí¼þÖÐµÄ7¶ÎÊýÂë¹Ü
//#define PRINTF_HID            //printfÊä³öÖ±½ÓÖØ¶¨Ïòµ½USB HID½Ó¿Ú#define  FOSC   30000000UL 
//#define	 F11_0592MHz
//#define  F12MHz
//#define  F18_432MHz    //18.432MHz
//#define  F20MHz
//#defimne  F22_1184MHz    //22.1184MHz
//#define  F24MHz         
//#define  F27MHz#define  F30MHz
//#define  F33MHz
//#define  F33_1776MHz   //33.1776MHz
//#define  F35MHz
//********************************************************
void SysInit(); //init System speed  fastest#endif

config.c代码：

/*config.cDesigned by Bill LiuVersion 0.0 Modified last by Bill Liu on 06/22/2022
*/#include 
#include "config.h"//********************************************************
void SysInit() //init System speed  fastest
{EAXFR = 1;		//visit XFR enableCKCON = 0x00; //set outer data bus speed fastestWTST = 0x00;  //CPU wait 0 to run program
}
//End of SysInit()

main.c代码：

/*main.cDesigned by Bill LiuVersion 0.0 Modified last by Bill Liu on 11/26/2022
*/#include "main.h"
//#include "config.h"
//#include "STC32G_Timer.h"
#include "STC32G_Delay.h"
//#include "STC32G_comparator.h"ui8 t1 = 250;
ui16 t2 = 65533;
i32 t3 = -165533;
f32 t4 = 51.25;
f64 t5 = -3.14;
ui8 t6 = 0;
ui16 t7 = 0;
i32 t8 = 0;
f32 t9 = 0;
f64 t10 = 0;
ui8 str[20] = {0};
ui8 str1[20] = "Hello World";void main()
{SysInit();Uart1_Init(VBAUD_8BITS,G1, 0, 9600);EEPROM_SectorErase(0x00); EEPROM_Write_nChar(0x00,&t1,1);EEPROM_Write_Integer(0x01,t2);EEPROM_Write_Long(0x03,t3);	EEPROM_Write_Float(0x07,t4);EEPROM_Write_Double(0x0B,t5);EEPROM_Write_String(0x13,str1);while(1){EEPROM_Read_nChar(0x00,&t6,1);				LongToString(t6,str);	Uart1_SendString(str);Uart1_SendString("\r\n");EEPROM_Read_Integer(0x01,&t7);	LongToString(t7,str);	Uart1_SendString(str);Uart1_SendString("\r\n");EEPROM_Read_Long(0x03,&t8);LongToString(t8,str);	Uart1_SendString(str);Uart1_SendString("\r\n");EEPROM_Read_Float(0x07,&t9);FloatString(t9,str,2);	Uart1_SendString(str);Uart1_SendString("\r\n");EEPROM_Read_Double(0x0B,&t10);FloatString(t10,str,2);	Uart1_SendString(str);Uart1_SendString("\r\n");EEPROM_Read_String(0x13,str);	Uart1_SendString(str);Uart1_SendString("\r\n");Uart1_SendString("\r\n");Delayxms(1000);}
}
//End of main()

编译结果：

下载到单片机的设置如下：

打开串口，串口助手中的结果如下：

可以看出数据写入与读出正确，其中3.14变成了3.15并非写入与读出错误，而是单片机处理浮点数的不足。

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