stm32f407硬件spi读写sst25vf闪存flash代码

1. void SPI_FLASH_Init(void)
2. {
3. GPIO_InitTypeDef GPIO_InitStructure;
4. SPI_InitTypeDef SPI_InitStructure;
5. NVIC_InitTypeDef NVIC_InitStructure;
7. /* Enable the SPI periph */
8. RCC_APB2PeriphClockCmd(FLASH_SPI_CLK, ENABLE);
10. /* Enable SCK, MOSI and MISO GPIO clocks */
11. RCC_AHB1PeriphClockCmd(FLASH_SPI_SCK_GPIO_CLK | FLASH_SPI_MOSI_GPIO_CLK | FLASH_SPI_MISO_GPIO_CLK, ENABLE);//FLASH_SPI_MISO_GPIO_CLK
13. /* Enable CS GPIO clock */
14. RCC_AHB1PeriphClockCmd(FLASH_SPI_CS_GPIO_CLK, ENABLE);
16. /* Enable 157 GPIO clock */
17. RCC_AHB1PeriphClockCmd(FLASH_SPI_157_GPIO_CLK, ENABLE);
20. GPIO_PinAFConfig(FLASH_SPI_SCK_GPIO_PORT, FLASH_SPI_SCK_SOURCE, FLASH_SPI_SCK_AF);
21. GPIO_PinAFConfig(FLASH_SPI_MISO_GPIO_PORT, FLASH_SPI_MISO_SOURCE, FLASH_SPI_MISO_AF);
22. GPIO_PinAFConfig(FLASH_SPI_MOSI_GPIO_PORT, FLASH_SPI_MOSI_SOURCE, FLASH_SPI_MOSI_AF);
24. GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
25. GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
26. GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_DOWN;
27. GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
29. /* SPI SCK pin configuration */
30. GPIO_InitStructure.GPIO_Pin = FLASH_SPI_SCK_PIN;
31. GPIO_Init(FLASH_SPI_SCK_GPIO_PORT, &GPIO_InitStructure);
33. /* SPI MOSI pin configuration */
34. GPIO_InitStructure.GPIO_Pin = FLASH_SPI_MOSI_PIN;
35. GPIO_Init(FLASH_SPI_MOSI_GPIO_PORT, &GPIO_InitStructure);
37. /* SPI MISO pin configuration */
38. GPIO_InitStructure.GPIO_Pin = FLASH_SPI_MISO_PIN;
39. GPIO_Init(FLASH_SPI_MISO_GPIO_PORT, &GPIO_InitStructure);
42. /* Configure GPIO PIN for Lis Chip select */
43. GPIO_InitStructure.GPIO_Pin = FLASH_SPI_CS_PIN;
44. GPIO_InitStructure.GPIO_Mode = GPIO_Mode_OUT;
45. GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
46. GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
47. GPIO_Init(FLASH_SPI_CS_GPIO_PORT, &GPIO_InitStructure);
49. SPI_FLASH_CS_HIGH();
51. /* Configure GPIO PIN for 157 */
52. GPIO_InitStructure.GPIO_Pin = FLASH_SPI_157_PIN;
53. GPIO_InitStructure.GPIO_Mode = GPIO_Mode_OUT;
54. GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
55. GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
56. GPIO_Init(FLASH_SPI_157_GPIO_PORT, &GPIO_InitStructure);
58. /* SPI1 configuration */
59. SPI_InitStructure.SPI_Direction = SPI_Direction_2Lines_FullDuplex;
60. SPI_InitStructure.SPI_Mode = SPI_Mode_Master;
61. SPI_InitStructure.SPI_DataSize = SPI_DataSize_8b;
62. SPI_InitStructure.SPI_CPOL = SPI_CPOL_High;
63. SPI_InitStructure.SPI_CPHA = SPI_CPHA_2Edge;
64. SPI_InitStructure.SPI_NSS = SPI_NSS_Soft;
65. SPI_InitStructure.SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_4;
66. SPI_InitStructure.SPI_FirstBit = SPI_FirstBit_MSB;
67. SPI_InitStructure.SPI_CRCPolynomial = 7;
68. SPI_Init(FLASH_SPI, &SPI_InitStructure);
70. /* Enable SPI1 */
71. SPI_Cmd(FLASH_SPI, ENABLE);
72. SPI_FLASH_157_DIS();
74. //SPI_DMAInit();
75. /* I2S DMA IRQ Channel configuration */
76. /* NVIC_InitStructure.NVIC_IRQChannel = SPI1_DMA_RX_IRQn;
77. NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
78. NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
79. NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
80. NVIC_Init(&NVIC_InitStructure);
82. NVIC_InitStructure.NVIC_IRQChannel = SPI1_DMA_TX_IRQn;
83. NVIC_Init(&NVIC_InitStructure);
84. Delay_Init(168);*/
86. }
88. /*------------------------------------------------------------------------------
89. 函数名称 : SPI_FLASH_Writebyte
90. 函数功能 : 写一个字节数据
91. 入口参数 : address:地址 buffer:数据
92. 出口参数 : 无
93. ------------------------------------------------------------------------------*/
95. void SPI_FLASH_Writebyte(unsigned int Addr, unsigned char *buf)
96. {
97. unsigned short i = 0, j = 0;
99. SPI_FLASH_WriteEnable();
101. SPI_FLASH_CS_LOW();
102. SPI_FLASH_SendByte(0x02);
103. SPI_FLASH_SendByte((Addr)>>16);
104. SPI_FLASH_SendByte((Addr)>>8);
105. SPI_FLASH_SendByte((Addr));
106. SPI_FLASH_SendByte(*buf);
107. SPI_FLASH_CS_HIGH();
108. SPI_FLASH_WaitForWriteEnd();
109. SPI_FLASH_WriteDisable();
110. delay_nus(20);
111. }
112. /*------------------------------------------------------------------------------
113. 函数名称 : SPI_FLASH_Writenbyte
114. 函数功能 : 写一个字节数据
115. 入口参数 : address:地址 buffer:数据 num :数量
116. 出口参数 : 无
118. ------------------------------------------------------------------------------*/
121. void SPI_FLASH_Writenbyte(unsigned int Addr, unsigned char *buf,u16 num)
122. {
123. u8 i;
124. for(i=0;i
125. {
126. SPI_FLASH_Writebyte(Addr++,&buf[i]);
127. }
129. }
130. /*------------------------------------------------------------------------------
131. 函数名称 : SPI_FLASH_Readnbyte
132. 函数功能 : 写一个字节数据
133. 入口参数 : address:地址 buffer:数据 num :数量
134. 出口参数 : 无
136. ------------------------------------------------------------------------------*/
138. void SPI_FLASH_Readnbyte(unsigned int Addr,unsigned char *buf,u16 num)
139. {
140. unsigned short i = 0;
142. SPI_FLASH_CS_LOW();
144. SPI_FLASH_SendByte(0x0b);
145. SPI_FLASH_SendByte(Addr>>16);
146. SPI_FLASH_SendByte(Addr>>8);
147. SPI_FLASH_SendByte(Addr);
148. //dummy
149. SPI_FLASH_SendByte(Dummy_Byte);
150. for(i=0;i
151. {
152. buf[i]= SPI_FLASH_SendByte(Dummy_Byte);
154. }
157. SPI_FLASH_CS_HIGH();
159. }
161. main()
163. {
165. u8 bufda[25]="123456789abcdefghijkl";
169. SPI_FLASH_Init();
172. // Write_74HC595(HC595_OUT,3,&davalu);
173. // Write_595_ENABLE();
174. SPI_FLASH_157_EN();//kang 2014.07.10
175. SPI_FLASH_ChipErase();
176. SPI_FLASH_157_DIS();
179. SPI_FLASH_157_EN(); //kang 2014.07.10
181. i= SPI_FLASH_ReadID();
182. SPI_FLASH_157_DIS();
184. SPI_FLASH_157_EN();
186. SPI_FLASH_Writenbyte(5,bufda,20);
187. SPI_FLASH_157_DIS();
189. SPI_FLASH_157_EN();
190. SPI_FLASH_Readnbyte(5,readbuf,20);
191. SPI_FLASH_157_DIS();
193. }