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stm32f407硬件spi读写sst25vf闪存flash代码

2020年9月18日 14:29 阅读(449)

voidSPI_FLASH_Init(void){GPIO_InitTypeDefGPIO_InitStructure;SPI_InitTypeDefSPI_InitStructure;NVIC_In

  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. 函数称号 : SPI_FLASH_Writebyte
  90. 函数功用 : 写一个字节数据
  91. 进口参数 : 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. 函数称号 : SPI_FLASH_Writenbyte
  114. 函数功用 : 写一个字节数据
  115. 进口参数 : 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. 函数称号 : SPI_FLASH_Readnbyte
  132. 函数功用 : 写一个字节数据
  133. 进口参数 : 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. }

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