Davinci工程WrapNv模块讲解

配置讲解

WrapNv模块里面有两个东西，WrapNvGeneral和WrapNvMemoryLayout。

WrapNvGeneral里面配置的就是这个E方的基地址

WrapNvMemoryLayout里面就是分几个块来存储，每个块有自己的数据。

再里面一层，有各自的长度和默认值。我们可以在后面自己加，后面会有演示。

源代码分析

首先是根据索引来定义位置，起始地址kEepStartAddress是0x1FFF8600，后面接着就是ApplSoftwareFingerprint块的位置，里面装着ApplSoftwareFingerprint的内容，长度为24字节。

/** Size defines ************************************************************** */
#define kEepSizeApplSoftwareFingerprint      0x18u
#define kEepSizeSecAccessDelayFlag           0x01u
#define kEepSizeSecAccessInvalidCount        0x01u
#define kEepSizeDcmDslRxTesterSourceAddr     0x02u
#define kEepSizeSecAccessActivatedLevel      0x01u

/** Address defines *********************************************************** */
#define kEepFblBaseAddress                   0x1FFF8600uL
#define kEepStartAddress                     kEepFblBaseAddress
#define kEepAddressApplSoftwareFingerprint   (kEepStartAddress)
#define kEepAddressSecAccessDelayFlag        (kEepAddressApplSoftwareFingerprint + kEepSizeApplSoftwareFingerprint)
#define kEepAddressSecAccessInvalidCount     (kEepAddressSecAccessDelayFlag + kEepSizeSecAccessDelayFlag)
#define kEepAddressDcmDslRxTesterSourceAddr  (kEepAddressSecAccessInvalidCount + kEepSizeSecAccessInvalidCount)
#define kEepAddressSecAccessActivatedLevel   (kEepAddressDcmDslRxTesterSourceAddr + kEepSizeDcmDslRxTesterSourceAddr)
#define kEepEndAddress                       (kEepAddressSecAccessActivatedLevel + kEepSizeSecAccessActivatedLevel - 1)
#define kEepSizeOfEeprom                     (kEepEndAddress - kEepStartAddress + 1)

内存分布图如下

下面有读写ApplSoftwareFingerprint的接口

#define ApplFblNvReadApplSoftwareFingerprint(buf) ((EepromDriver_RReadSync((buf), kEepSizeApplSoftwareFingerprint, kEepAddressApplSoftwareFingerprint) == IO_E_OK) ? WRAPNV_E_OK : WRAPNV_E_NOT_OK)
#define ApplFblNvWriteApplSoftwareFingerprint(buf) ((EepromDriver_RWriteSync((buf), kEepSizeApplSoftwareFingerprint, kEepAddressApplSoftwareFingerprint) == IO_E_OK) ? WRAPNV_E_OK : WRAPNV_E_NOT_OK)

这两个接口在BSW层的ApplFblReadDataByIdentifier和ApplFblWriteDataByIdentifier有调用。本质上就是调用EepromDriver_RReadSync和EepromDriver_RWriteSync两个接口来读写E方内容，三个入参为buffer指针，数据长度，数据起始地址。

进去里面会调用EepromDriver_CheckRangeContained来检查读写的范围是否在E方里面，它判断的首地址为EEP_BASE_ADDRESS，里面指向eepData数组，长度为0x100。

# define EEP_BASE_ADDRESS           ((vuint32)eepData)
# define EEP_BUFFER_SIZE           0x100u

#define EEPDUMMY_START_SEC_VAR
#include "MemMap.h"  /* PRQA S 5087 */ /* MD_MSR_19.1 */
V_MEMRAM0 static V_MEMRAM1 IO_U8 V_MEMRAM2 eepData[EEP_BUFFER_SIZE];
#define EEPDUMMY_STOP_SEC_VAR
#include "MemMap.h"  /* PRQA S 5087 */ /* MD_MSR_19.1 */

要知道这个数组在什么内存地址，就要搜索EEPDUMMY_START_SEC_VAR定义了哪里，映射到MemMap.h的什么地方。在Demo\DemoFbl\Appl\IncludeMemMap.h里面找到这么一段，说明映射到section(".EepDataSection")里面，它应该在LD文件里面定义了。

#if defined( EEPDUMMY_START_SEC_VAR )
__attribute__ ((section(".EepDataSection")))
# undef EEPDUMMY_START_SEC_VAR
# undef FBL_MEMMAP_ERROR
#endif

CBD2100013_D00\Demo\DemoFbl\Appl\Source\vLinkGen_Template.ld里面搜索到EepDataSection在EepDummy里面，EepDummy是0x1FFF8600开始，长度为0x00000100，那起始地址和长度就对上了。

MEMORY
{
   ……
  EepDummy : ORIGIN = 0x1FFF8600 , LENGTH = 0x00000100 /* 256 Byte */
   ……
}

SECTIONS
{
   ……
  .EepDummySection : ALIGN(4)
  {
    _EepDummySection_START = ABSOLUTE(.);
    *(*.EepDataSection)
    . = ALIGN(4);
    _EepDummySection_END = ABSOLUTE(. - 1);
    _EepDummySection_LIMIT = ABSOLUTE(.);
  } > EepDummy
   ……
}

操作示例

我们在后面加一个AllIsWell的块，16字节长度。

在这里加一个AllIsWell块。

设置个16字节长度，顺带改个名。

然后定义这块就变成这样

/** Size defines ************************************************************** */
#define kEepSizeApplSoftwareFingerprint      0x18u
#define kEepSizeSecAccessDelayFlag           0x01u
#define kEepSizeSecAccessInvalidCount        0x01u
#define kEepSizeDcmDslRxTesterSourceAddr     0x02u
#define kEepSizeSecAccessActivatedLevel      0x01u
#define kEepSizeAllIsWell                    0x10u//新增

/** Address defines *********************************************************** */
#define kEepFblBaseAddress                   0x1FFF8600uL
#define kEepStartAddress                     kEepFblBaseAddress
#define kEepAddressApplSoftwareFingerprint   (kEepStartAddress)
#define kEepAddressSecAccessDelayFlag        (kEepAddressApplSoftwareFingerprint + kEepSizeApplSoftwareFingerprint)
#define kEepAddressSecAccessInvalidCount     (kEepAddressSecAccessDelayFlag + kEepSizeSecAccessDelayFlag)
#define kEepAddressDcmDslRxTesterSourceAddr  (kEepAddressSecAccessInvalidCount + kEepSizeSecAccessInvalidCount)
#define kEepAddressSecAccessActivatedLevel   (kEepAddressDcmDslRxTesterSourceAddr + kEepSizeDcmDslRxTesterSourceAddr)
#define kEepAddressAllIsWell                 (kEepAddressSecAccessActivatedLevel + kEepSizeSecAccessActivatedLevel)//新增
#define kEepEndAddress                       (kEepAddressAllIsWell + kEepSizeAllIsWell - 1)//往后延了地址
#define kEepSizeOfEeprom                     (kEepEndAddress - kEepStartAddress + 1)

多了对AllIsWell块的读写接口，我们用到的时候调用这两个接口就可以了。

#define ApplFblNvReadAllIsWell(buf)          ((EepromDriver_RReadSync((buf), kEepSizeAllIsWell, kEepAddressAllIsWell) == IO_E_OK) ? WRAPNV_E_OK : WRAPNV_E_NOT_OK)
#define ApplFblNvWriteAllIsWell(buf)         ((EepromDriver_RWriteSync((buf), kEepSizeAllIsWell, kEepAddressAllIsWell) == IO_E_OK) ? WRAPNV_E_OK : WRAPNV_E_NOT_OK)

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