標(biāo)題: 16MB的FLASHW25Q128驅(qū)動 [打印本頁]

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作者: xiaos    時間: 2015-4-10 17:00
標(biāo)題: 16MB的FLASHW25Q128驅(qū)動

1. #define SPI_SCK_LOW() GPIOB->ODR&=~(1<<3)
   
2. #define SPI_SCK_HIGH()         GPIOB->ODR|=1<<3
   
3. 
   
4. #define SPI_MOSI_LOW()GPIOB->ODR&=~(1<<5)
   
5. #define SPI_MOSI_HIGH()GPIOB->ODR|=1<<5
   
6. 
   
7. #define SPI_CS_LOW()GPIOB->ODR&=~(1<<14)
   
8. #define SPI_CS_HIGH()        GPIOB->ODR|=1<<14
   
9. 
   
10. #define SPI_MISO_Read()(GPIOB->IDR&(1<<4))
    
11. 
    
12. 
    
13. #define W25X_WriteEnable          0x06     //寫允許命令
    
14. #define W25X_WriteDisable          0x04    //禁止命令
    
15. #define W25X_ReadStatusReg      0x05   //讀狀態(tài)寄存器
    
16. #define W25X_WriteStatusReg      0x01  //寫狀態(tài)寄存器
    
17. #define W25X_ReadData                0x03  //讀數(shù)據(jù)
    
18. #define W25X_FastReadData         0x0B //快讀
    
19. #define W25X_FastReadDual         0x3B  
    
20. #define W25X_PageProgram          0x02  //頁寫
    
21. #define W25X_BlockErase               0xD8  //快擦除
    
22. #define W25X_SectorErase         0x20  //扇區(qū)擦除
    
23. #define W25X_ChipErase                            0xC7  //整盤擦除
    
24. #define W25X_PowerDown                         0xB9  //低功耗
    
25. #define W25X_ReleasePowerDown           0xAB
    
26. #define W25X_DeviceID                             0xAB
    
27. #define W25X_ManufactDeviceID             0x90
    
28. #define W25X_JedecDeviceID                 0x9F
    
29. 
    
30. 
    
31. static void SPI_SendByte(uint8_t Byte)         //使用SPI總線發(fā)送1個字節(jié)的數(shù)據(jù)
    
32. {
    
33. //uint8_t Cnt;
    
34. //SPI_SCK_LOW();
    
35. //for(Cnt=0;Cnt<8;Cnt++)
    
36. //{
    
37. //if(Byte&0x80)
    
38. //SPI_MOSI_HIGH();
    
39. //else
    
40. //SPI_MOSI_LOW();
    
41. //SPI_SCK_HIGH();
    
42. //Byte<<=1;
    
43. //SPI_SCK_LOW();
    
44. //}
    
45. while(SPI_I2S_GetFlagStatus(SPI1,SPI_I2S_FLAG_TXE)==RESET);
    
46. SPI_I2S_SendData(SPI1,Byte);
    
47. while(SPI_I2S_GetFlagStatus(SPI1,SPI_I2S_FLAG_RXNE)==RESET);
    
48. SPI_I2S_ReceiveData(SPI1);
    
49. }
    
50. 
    
51. static uint8_t SPI_ReceiveByte(void)   //使用SPI總線接收1個字節(jié)的數(shù)據(jù)
    
52. {
    
53. //uint8_t Byte=0,Cnt;
    
54. ////GPIOB->ODR|=1<<4;
    
55. //for(Cnt=0;Cnt<8;Cnt++)
    
56. //{
    
57. //SPI_SCK_HIGH();
    
58. //Byte<<=1;
    
59. //if(SPI_MISO_Read())
    
60. //Byte++;
    
61. //SPI_SCK_LOW();
    
62. //}
    
63. //return Byte;
    
64. while(SPI_I2S_GetFlagStatus(SPI1,SPI_I2S_FLAG_TXE)==RESET);
    
65. SPI_I2S_SendData(SPI1,0xff);
    
66. while(SPI_I2S_GetFlagStatus(SPI1,SPI_I2S_FLAG_RXNE)==RESET);
    
67. return SPI_I2S_ReceiveData(SPI1);
    
68. }
    
69. /************************FLASH****************************/
    
70. 
    
71. uint8_t FLASH_ReadStatusReg(void)   //讀狀態(tài)寄存器
    
72. {
    
73. uint8_t Status;
    
74. SPI_CS_LOW();        
    
75. SPI_SendByte(W25X_ReadStatusReg);      
    
76. Status=SPI_ReceiveByte();        
    
77. SPI_CS_HIGH();     
    
78. return Status;
    
79. }
    
80. 
    
81. void FLASH_WriteEnable(void)
    
82. {
    
83. SPI_CS_LOW();
    
84. SPI_SendByte(W25X_WriteEnable);
    
85. SPI_CS_HIGH();
    
86. }
    
87. void FLASH_WriteByte(uint32_t Address,uint8_t Byte)
    
88. {
    
89. FLASH_WriteEnable();//改變磁盤的操作都需要寫允許命令
    
90. SPI_CS_LOW();
    
91. SPI_SendByte(W25X_PageProgram);
    
92. SPI_SendByte(Address>>16);
    
93. SPI_SendByte(Address>>8);
    
94. SPI_SendByte(Address);
    
95. SPI_SendByte(Byte);
    
96. SPI_CS_HIGH();
    
97. while(FLASH_ReadStatusReg()&0x01);
    
98. }
    
99. 
    
100. void FLASH_ReadByte(uint32_t Address ,uint8_t *pByte)
     
101. {
     
102. SPI_CS_LOW();
     
103. SPI_SendByte(W25X_ReadData);
     
104. SPI_SendByte(Address>>16);
     
105. SPI_SendByte(Address>>8);
     
106. SPI_SendByte(Address);
     
107. *pByte=SPI_ReceiveByte();
     
108. SPI_CS_HIGH();
     
109. }
     
110. 
     
111. uint16_t FLASH_ReadID(void)
     
112. {
     
113. uint16_t Temp=0;
     
114. SPI_CS_LOW();
     
115. SPI_SendByte(W25X_ManufactDeviceID);
     
116. SPI_SendByte(0x00);
     
117. SPI_SendByte(0x00);
     
118. SPI_SendByte(0x00);
     
119. Temp|=SPI_ReceiveByte()<<8;
     
120. Temp|=SPI_ReceiveByte();
     
121. SPI_CS_HIGH();
     
122. return Temp;
     
123. }
     
124. 
     
125. void FLASH_Erase_Sector(uint32_t Address)
     
126. {
     
127. FLASH_WriteEnable();
     
128. while(FLASH_ReadStatusReg()&0x01);
     
129. SPI_CS_LOW();
     
130. SPI_SendByte(W25X_SectorErase);
     
131. SPI_SendByte(Address>>16);
     
132. SPI_SendByte(Address>>8);
     
133. SPI_SendByte(Address);
     
134. SPI_CS_HIGH();
     
135. while(FLASH_ReadStatusReg()&0x01);
     
136. }
     
137. 
     
138. void FLASH_Wrase_Chip(void)
     
139. {
     
140. FLASH_WriteEnable();
     
141. SPI_SendByte(0x00);
     
142. while(FLASH_ReadStatusReg()&0x01);
     
143. SPI_CS_LOW();
     
144. SPI_SendByte(W25X_ChipErase);
     
145. SPI_CS_HIGH();
     
146. while(FLASH_ReadStatusReg()&0x01);
     
147. }

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