关于1052 FlexSPI B1端口使用的灵异事件

欲速不达 · 发表于 2020-7-9 16:04:40

FlexSPI挂载了两片FLASH,kFLEXSPI_PortA1端口挂载了nor flash,kFLEXSPI_PortB1端口挂载了nand flash,参考了原子哥的FLEXSPI读写W25Q64的例程代码来读取kFLEXSPI_PortB1的NAND FLASH设备ID，结果返回的是的是W24Q64的设备ID，用示波器测试发现访问kFLEXSPI_PortB1的时候片选信号没有任何电平变化(片选信号不生效，片选信号不生效，片选信号不生效)，反而是kFLEXSPI_PortA1的片选有变化，简言而知，我要读取NAND FLASH的设备ID，结果却返回的是NOR FLASH的社保ID，关于FlexSPI B1端口使用的灵异事件已经塞车了好几天，劳烦各位大神一起探讨一下，留下宝贵建议。

uint32_t WB_NAND_Read_JEDEC_ID(void)
{
uint32_t temp,vendorID;
flexspi_transfer_t FlashTransfer;

FlashTransfer.deviceAddress=0;                            //地址
FlashTransfer.port=kFLEXSPI_PortB1;                      //端口
FlashTransfer.cmdType=kFLEXSPI_Read;                      //操作类型：读数据
FlashTransfer.SeqNumber=1;                               //序号
FlashTransfer.seqIndex=NOR_CMD_LUT_SEQ_IDX_READ_JEDEC_ID; //LUT表中命令索引
FlashTransfer.data=&temp;                                  //读到的数据
FlashTransfer.dataSize=3;                                  //读的数据长度

/* 开始阻塞传输 */
status_t status = FLEXSPI_TransferBlocking(FLEXSPI,&FlashTransfer);

/* 调整高低字节，结果赋值到 vendorId */
vendorID = ((temp&0xFF)<<16) | (temp&0xFF00) | ((temp&0xFF0000)>>16);

PRINTF("status:%d temp=0x%x vendorID=0x%x\r\n",status,temp,vendorID);

return vendorID;
}

//初始化FlexSPI Nand Flash
void FlexSPI_FlashInit(void)
{
//W25N01GVZEIG最高104MHz
//初始化FlexSPI时钟，W25Q128JV最高可以到133MHz
CLOCK_InitUsb1Pfd(kCLOCK_Pfd0,24);    //设置PLL3的PFD0为480Mhz*18/24=360MHz
CLOCK_SetMux(kCLOCK_FlexspiMux,0x3); //FlexSPI时钟源选择PLL3 PFD0
CLOCK_SetDiv(kCLOCK_FlexspiDiv,3);    //FlexSPI时钟设置为360/(3+1)=90Mhz

//配置FlexSPI所使用的IO的复用功能
IOMUXC_SetPinMux(IOMUXC_GPIO_SD_B1_00_FLEXSPIB_DATA03,0);
IOMUXC_SetPinMux(IOMUXC_GPIO_SD_B1_01_FLEXSPIB_DATA02,0);
IOMUXC_SetPinMux(IOMUXC_GPIO_SD_B1_02_FLEXSPIB_DATA01,0);
IOMUXC_SetPinMux(IOMUXC_GPIO_SD_B1_03_FLEXSPIB_DATA00,0);
IOMUXC_SetPinMux(IOMUXC_GPIO_SD_B1_04_FLEXSPIB_SCLK,0);
IOMUXC_SetPinMux(IOMUXC_GPIO_SD_B1_05_FLEXSPIB_SS0_B,0);

//高转换速度,驱动能力为R0/6,速度为200Mhz，关闭开路功能，使能pull/keepr
//选择keeper功能，下拉100K Ohm，关闭Hyst
IOMUXC_SetPinConfig(IOMUXC_GPIO_SD_B1_00_FLEXSPIB_DATA03,0x10F1);
IOMUXC_SetPinConfig(IOMUXC_GPIO_SD_B1_01_FLEXSPIB_DATA02,0x10F1);
IOMUXC_SetPinConfig(IOMUXC_GPIO_SD_B1_02_FLEXSPIB_DATA01,0x10F1);
IOMUXC_SetPinConfig(IOMUXC_GPIO_SD_B1_03_FLEXSPIB_DATA00,0x10F1);
IOMUXC_SetPinConfig(IOMUXC_GPIO_SD_B1_04_FLEXSPIB_SCLK,0x10F1);
IOMUXC_SetPinConfig(IOMUXC_GPIO_SD_B1_05_FLEXSPIB_SS0_B,0x10F1);

SCB_DisableDCache();
/*Get FLEXSPI default settings and configure the flexspi. */
FLEXSPI_GetDefaultConfig(&flexspi_norflash_config);

/*Set AHB buffer size for reading data through AHB bus. */
flexspi_norflash_config.ahbConfig.enableAHBPrefetch=true;
FLEXSPI_Init(FLEXSPI,&flexspi_norflash_config);

/* Configure flash settings according to serial flash feature. */
FLEXSPI_SetFlashConfig(FLEXSPI,&NandFlash_config,kFLEXSPI_PortB1);

   /* Update LUT table. */
FLEXSPI_UpdateLUT(FLEXSPI, 0, FlexSPI_LUT, CUSTOM_LUT_LENGTH);

WB_NAND_Read_JEDEC_ID();

}