c8051f410Flash运用

/*

数据存储空间从地址0x0000到0x08ff;

扇区是512字节,擦除操作是整扇区擦除,所以Flash_Erase(0x0000)的擦除范围是0x0000到0x0200;

值得注意的是Flash_Erase(0x01ff)的擦除范围也是0x0000到0x0200;



*/

#include "c8051f410.h" 

void Flash_Write(unsigned char source,unsigned int address);

unsigned char Flash_Read(unsigned int addr);

void Flash_Erase(unsigned int address);



int i,j;

unsigned char result;

main()

{

 OSCICN = 0x87;

 PCA0MD &= ~0x40;  

 XBR0= 0x01;                   

    XBR1= 0x40;   

 

 //Flash_Erase(0x410);

 //Flash_Write(11,0x410);

 result=Flash_Read(0x410);

 i=0;

}



void Flash_Write(unsigned char source,unsigned int address)

{

    unsigned char EA_save;   // saves the current interrupt state

    unsigned char xdata * data pwrite;



    EA_save = EA;

    EA = 0;                  // disable interrupts



    pwrite = (unsigned char xdata *) address;



    FLKEY = 0xA5;            // FLASH lock and key sequence 1

    FLKEY = 0xF1;            // FLASH lock and key sequence 2

    PSCTL = 0x01;            // Sets PSWE bit, Clears PSEE bit



    *pwrite = source;      // Move the data to C8051F326 flash



    PSCTL &= ~0x01;          // Clear PSWE so MOVX target XRAM



    EA = EA_save;            // re-enable interrupts

}



void Flash_Erase(unsigned int address)

{

   unsigned char EA_save;   // saves the current interrupt state

    unsigned char xdata * data pwrite;



    EA_save = EA;

    EA = 0;                  // disable interrupts



    pwrite = (unsigned char xdata *) address;



    FLKEY = 0xA5;            // FLASH lock and key sequence 1

    FLKEY = 0xF1;            // FLASH lock and key sequence 2

    PSCTL = 0x03;           // Sets PSWE bit, Sets PSEE bit



    *pwrite = 0xff;        //擦除整个扇区



    PSCTL &= ~0x03;          // Clear PSWE and PSEE so MOVX target XRAM



    EA = EA_save;            // re-enable interrupts



}



unsigned char Flash_Read(unsigned int addr)

{

    unsigned char EA_save,Tmp_data;   // saves the current interrupt state

    unsigned char code * data pread;



    EA_save = EA;

    EA = 0;                  // disable interrupts



 pread = (unsigned char code *) addr;



    Tmp_data = *pread;        //读指定flash地址数据



    EA = EA_save;            // re-enable interrupts



 return Tmp_data;

}