了解下

学习一下

其他两款价格是优势啊，对于个人来说，还是价格优先。对于公司来说还是性能优先的

福禄克万用表量程.自动量程，无需手动切换，表笔做工好。使用5号电池，更换方便，使用4层板，抗干扰能力更好 使用陶瓷保险丝。可以测量大1000u的大电容，不错，就是价格贵了点。好东西。

main（） ｛    IIC_test();     SRAM_test();//FSMC    PCL_Test();//FSMC }这样会死掉， 但是这样： main（） ｛           printf("\nI2C Read-Write test: \n");   if(I2C_FRAM_BufferWrite(u8Test_data,Start_addr_Test,Test_buflen)==TRUE)                 printf(" I2C Write OK: \n");         else                 printf(" I2C Write EEROR: \n");   if(I2C_FRAM_BufferRead(u8readdata,Start_addr_Test,Test_buflen)==TRUE)         {                 for(j=0;j

AD5422时序图 ：使用 SPI_InitStructure.SPI_CPOL = SPI_CPOL_Low; SPI_InitStructure.SPI_CPHA = SPI_CPHA_1Edge; void SPI_Master_Config(void) {   GPIO_InitTypeDef GPIO_InitStructure; //  DMA_InitTypeDef DMA_InitStructure;   SPI_InitTypeDef  SPI_InitStructure;   /* Peripheral Clock Enable -------------------------------------------------*/   /* Enable the SPI clock */   SPI_Master1_CLK_INIT(SPI_Master1_CLK, ENABLE);      /* Enable GPIO clocks */   RCC_AHB1PeriphClockCmd(SPI_Master1_SCK_GPIO_CLK | SPI_Master1_MISO_GPIO_CLK | SPI_Master1_MOSI_GPIO_CLK, ENABLE);    //  /* Enable DMA clock */ //  RCC_AHB1PeriphClockCmd(SPI_Master1_DMA_CLK, ENABLE);   /* SPI GPIO Configuration --------------------------------------------------*/   /* GPIO Deinitialisation */   GPIO_DeInit(SPI_Master1_SCK_GPIO_PORT);   GPIO_DeInit(SPI_Master1_MISO_GPIO_PORT);   GPIO_DeInit(SPI_Master1_MOSI_GPIO_PORT);      /* Connect SPI pins to AF5 */     GPIO_PinAFConfig(SPI_Master1_SCK_GPIO_PORT, SPI_Master1_SCK_SOURCE, SPI_Master1_SCK_AF);   GPIO_PinAFConfig(SPI_Master1_MISO_GPIO_PORT, SPI_Master1_MISO_SOURCE, SPI_Master1_MISO_AF);      GPIO_PinAFConfig(SPI_Master1_MOSI_GPIO_PORT, SPI_Master1_MOSI_SOURCE, SPI_Master1_MOSI_AF);   GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;   GPIO_InitStructure.GPIO_Speed = GPIO_Speed_100MHz;   GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;   GPIO_InitStructure.GPIO_PuPd  = GPIO_PuPd_NOPULL;   /* SPI SCK pin configuration */   GPIO_InitStructure.GPIO_Pin = SPI_Master1_SCK_PIN;   GPIO_Init(SPI_Master1_SCK_GPIO_PORT, &GPIO_InitStructure);      /* SPI  MISO pin configuration */   GPIO_InitStructure.GPIO_Pin =  SPI_Master1_MISO_PIN;   GPIO_Init(SPI_Master1_MISO_GPIO_PORT, &GPIO_InitStructure);     /* SPI  MOSI pin configuration */   GPIO_InitStructure.GPIO_Pin =  SPI_Master1_MOSI_PIN;   GPIO_Init(SPI_Master1_MOSI_GPIO_PORT, &GPIO_InitStructure);   /* SPI configuration -------------------------------------------------------*/   SPI_I2S_DeInit(SPI_Master1);   SPI_InitStructure.SPI_Direction = SPI_Direction_2Lines_FullDuplex;         SPI_InitStructure.SPI_Mode=SPI_Mode_Master;   SPI_InitStructure.SPI_DataSize = SPI_DataSize_8b;   SPI_InitStructure.SPI_CPOL = SPI_CPOL_Low;   SPI_InitStructure.SPI_CPHA = SPI_CPHA_1Edge;   SPI_InitStructure.SPI_NSS = SPI_NSS_Soft;   SPI_InitStructure.SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_256;   SPI_InitStructure.SPI_FirstBit = SPI_FirstBit_MSB;   SPI_InitStructure.SPI_CRCPolynomial = 7;   SPI_Init(SPI_Master1, &SPI_InitStructure); SPI_Cmd(SPI_Master1, ENABLE); }

NAND512W3A2CN6E  ID = 20,76,20,76  ，后面2个字节对不？前面2个对的

SDRAM工作没问题。NAND就差NCEpin初始化，应该也没问题的

接线图：

串口打印：SDRAM_16_write:eeff , SDRAM_16_read:eeff NAND FLASH Status:0 Nand Flash ID = 20,76,20,76  

void FSMC_NAND_ReadID(NAND_IDTypeDef* NAND_ID) {    u32 data = 0; /*!< Send Command to the command area */   *(vu8 *)(Bank_NAND_ADDR | CMD_AREA) = 0x90;         *(vu8 *)(Bank_NAND_ADDR | ADDR_AREA) = 0x00; /*!< Sequence to read ID from NAND flash */ data = *(vu32 *)(Bank_NAND_ADDR | DATA_AREA);   NAND_ID->Maker_ID   = ADDR_1st_CYCLE (data);//四个周期读取四个ID         NAND_ID->Device_ID  = ADDR_2nd_CYCLE (data);   NAND_ID->Third_ID   = ADDR_3rd_CYCLE (data);         NAND_ID->Fourth_ID  = ADDR_4th_CYCLE (data); }

/* NAND Area definition  Board RevD */ #define CMD_AREA                   (u32)(1

u32 FSMC_NAND_ReadStatus(void) {   u32 data = 0x00, status = NAND_BUSY;   /* Read status operation ------------------------------------ */   *(vu8 *)(Bank_NAND_ADDR | CMD_AREA) = NAND_CMD_STATUS;           data = *(vu8 *)(Bank_NAND_ADDR);   if((data & NAND_ERROR) == NAND_ERROR)//SR0   {     status = NAND_ERROR;   }   else if((data & NAND_READY) == NAND_READY)//SR6   {     status = NAND_READY;   }   else   {     status = NAND_BUSY;   }      return (status); }

        NAND_FLASH_Time.FSMC_SetupTime = 1;     //建立时间         NAND_FLASH_Time.FSMC_HoldSetupTime = 3; //保持时间         NAND_FLASH_Time.FSMC_WaitSetupTime = 2; //等待时间   NAND_FLASH_Time.FSMC_HiZSetupTime = 1;  //高阻建立时间                 NAND_FLASHStru.FSMC_Bank = FSMC_Bank2_NAND;                    //使用FSMC BANK2         NAND_FLASHStru.FSMC_Waitfeature = FSMC_Waitfeature_Enable;     //使能FSMC的等待功能         NAND_FLASHStru.FSMC_MemoryDataWidth = FSMC_MemoryDataWidth_8b; //NAND Flash 8bit         NAND_FLASHStru.FSMC_ECC = FSMC_ECC_Enable;                     //使能ECC特性         NAND_FLASHStru.FSMC_ECCPageSize = FSMC_ECCPageSize_512Bytes;   //ECC页大小         NAND_FLASHStru.FSMC_TCLRSetupTime = 0;         NAND_FLASHStru.FSMC_TARSetupTime = 0;         NAND_FLASHStru.FSMC_AttributeSpaceTimingStruct = &NAND_FLASH_Time;         NAND_FLASHStru.FSMC_CommonSpaceTimingStruct = &NAND_FLASH_Time;                 FSMC_NANDInit(&NAND_FLASHStru);                 /*!使能FSMC BANK2 */   FSMC_NANDCmd(FSMC_Bank2_NAND, ENABLE);

好东西

好东西

好东西

好东西，学习

谢谢分享

谢谢分享