如何改变PSDK1.x Sample中SD卡的剩余内存并推送至APP

关键词：PSDK1.x

适用机型：M200系列、M210系列、M200 V2系列、M210 V2系列

SDK版本：PSDK 1.4.0&PSDK1.4.1

Skyport固件：01.02.00及以上

step1：找到SD卡剩余内存所在结构体T_PsdkCameraGetSDCardStateAck

typedef struct {
 uint8_t ackCode; /*!< Specifies PSDK command ack code.
 This parameter can be any value of ::E_PsdkCmdAckCode */
 uint8_t isInserted : 1; /*!< Specifies if the SD card is inserted in the camera.
 This parameter is boolean type. */
 uint8_t isVerified : 1; /*!< Specifies if the SD card is verified as genuine.
 This parameter is boolean type. */

uint8_t isInitializing : 1; /*!< This parameter is boolean type. */
 uint8_t isReadOnly : 1; /*!< This parameter is boolean type. */
 uint8_t isFormatting : 1; /*!< This parameter is boolean type. */
 uint8_t isFull : 1; /*!< This parameter is boolean type. */
 uint8_t isInvalidFormat : 1;/*!< This parameter is boolean type. */
 uint8_t hasError : 1; /*!< This parameter is boolean type. */
 uint8_t reserved;

uint32_t totalSpaceInMB; /*!< SD card total capacity, unit: MB. */
 uint32_t remainSpaceInMB; /*!< SD card remaining capacity, unit: MB. */
 uint32_t availableCaptureCount; /*!< Available shots, unit: s. */
 uint32_t availableRecordingTimeInSeconds; /*!< Available video recording time, unit: s. */
} T_PsdkCameraGetSDCardStateAck;

step2：找到全局赋值变量 remainCapacity（初始值2048Mb）

//SD card parameters
static uint8_t insertState = 1;
static uint32_t capacity = 4096; //uint: MB
static uint32_t remainCapacity = 2048; //unit: MB
static uint32_t remainShots = 100;
static uint32_t remainRecordTime = 6000; //unit: s

step3：在SD卡状态获取函数中尝试动态改变剩余内存的值（每次减少10Mb）

void CamEmu_GetSdcardParam(const T_PsdkCameraGetSDCardStateReq *req, T_PsdkCameraGetSDCardStateAck *ack)
{
 PSDK_LOG_DEBUG("Get Sd card Param");
 ack->isInserted = insertState;
 ack->isVerified = 1;
 ack->isInitializing = 0;
 ack->isReadOnly = 0;
 ack->isFormatting = 0;
 ack->isFull = 0;
 ack->isInvalidFormat = 0;
 ack->hasError = 0;
 ack->totalSpaceInMB = capacity;
 ack->remainSpaceInMB = remainCapacity;
 remainCapacity=remainCapacity-10;
 ack->availableRecordingTimeInSeconds = remainRecordTime;
 ack->availableCaptureCount = remainShots;
ack->ackCode = PSDK_CMD_ACK_CODE_OK;
}

step4：定义相机命令回调函数列表

const T_PsdkCameraHandler g_testCameraHandler = {
 .SetMode = CamEmu_SetCameraMode,
 .GetMode = CamEmu_GetCameraMode,

.ShootPhoto = CamEmu_Photography,
 .GetShootPhotoState = CamEmu_GetPhotographyState,

.SetShootPhotoMode = CamEmu_SetPhotographyMode,
 .GetShootPhotoMode = CamEmu_GetPhotographyMode,

.RecordVideo = CamEmu_SetRecording,
 .GetRecordVideoState = CamEmu_GetRecordingState,

.GetSDCardState = CamEmu_GetSdcardParam,
 .FormatSDCard = CamEmu_FormatSdcard,

};

step5：在初始化函数中将数据更新提供给回调函数

E_PsdkStat PsdkCamera_Init(T_PsdkUpper *psdkUpper, const T_PsdkCameraHandler *cameraHandler)
{
 T_PsdkProtCmdSetHandle cmdSetHandle;

s_cameraHandler = *cameraHandler;

cmdSetHandle.cmdSet = PSDK_CMDSET_CAMERA;
 cmdSetHandle.cmdList = s_PayloadCameraCmdList;
 cmdSetHandle.cmdCount = sizeof(s_PayloadCameraCmdList) / sizeof(T_PsdkProtCmdItem);

//support camera
 s_isSupportCamera = 1;

return PsdkProto_RegCmdSetHandler(&(psdkUpper->protHandle), &cmdSetHandle);
}

step6：在主函数中调用初始化函数，飞控会以一定的频率回调SD卡数据