头文件自己搞吧，不贴了，写Flash时候记得先要擦除。

代码如下

 /*
02 ================================================================================
03 File Name      : Flash.c
04 Description    : C8051F330 Flash操作单元
06 Version        : V1.0
11 ================================================================================
 */
13 
14 #include <c8051f330.h>
15 #include "Flash.h"
16 
17 unsignedcharFlash_ReadByte(unsignedintaddr)
18 {
19     return*(unsignedcharcode*)addr;
20 }
21 
22 voidFlash_ReadBytes(unsignedintaddr,unsignedchar*buff,unsignedintsize)
23 {
24     unsignedinti;
25     unsignedcharcode*x;
26     x= (unsignedcharcode*)addr;
27     for (i=0;i<size;i++)
28     {
29         buff[i]=*x;
30         x++;
31     }
32 }
33 
34 voidFlash_Erase(unsignedintaddr)
35 {
36     unsignedcharxdata*x;
37     x= (unsignedcharxdata*)addr;
38     PSCTL=0x03;
39     FLKEY=0xA5;
40     FLKEY=0xF1;
41     *x=0;
42     PSCTL=0x00;
43 }
44 
45 voidFlash_WriteByte(unsignedintaddr,unsignedchar b)
46 {
47     unsignedcharxdata*x;
48     x= (unsignedcharxdata*)addr;
49     PSCTL=0x01;
50     FLKEY=0xA5;
51     FLKEY=0xF1;   
52     *x= b;
53     PSCTL=0x00;
54 }
55 
56 voidFlash_WriteBytes(unsignedintaddr,unsignedchar*buff,unsignedintsize)
57 {
58     unsignedcharxdata*x;
59     unsignedinti;
60     x= (unsignedcharxdata*)addr;
61     PSCTL=0x01;
62     for (i=0;i<size;i++)
63     {
64         FLKEY=0xA5;
65         FLKEY=0xF1;
66         *x=buff[i];
67         x++;
68     }
69     PSCTL=0x00;