omapl138共享内存，数据传输问题

我有关于omapl138共享内存，数据传输问题，请教。
1.

it can't write immediately to shared ram.

code list delow:

static bool server_upp_data_transfer(Server *server) { if(server->ad_started == false) return true;
    while (ListMP_empty(server->list_free))  /* wait */
        Task_sleep(10000);

    DataNode *node = (DataNode *)ListMP_getTail(server->list_free); /* get free node */
    int *data = (int *)SharedRegion_getPtr(node->SR_buffer);

    server->transposeParA.WindowAddress     = (unsigned int *)data;  /* set taget */
    server->transposeParA.LineCount   = node->buffer_height;
    server->transposeParA.ByteCount   = node->buffer_pitch;    server->transposeParA.LineOffsetAddress = node->buffer_pitch;

    upp_error_count = 0;
    upp_dmai_int_cut = 0;

    /* fill in data */
    uPPDMATransfer(SOC_UPP_0_REGS, uPP_DMA_CHI, &server->transposeParA);

    /* wait */
    while (upp_dmai_int_cut < 1 && upp_error_count == 0);

    if (upp_error_count != 0) {
        LOG_ERROR("data mismatch in buffers");
        LOG_ERROR("upp_error_count=%d",upp_error_count);
    }

    /* make data node in busy list */
    ListMP_putHead(server->list_busy, (ListMP_Elem *)node);

    return true;
}
………………………………………………

2.

我的程序是：
            dsp：通过dma方式“uPPDMATransfer(SOC_UPP_0_REGS, uPP_DMA_CHI, &server->transposeParA)”从upp_A口读入数据48kB数据，存在共享内存中（起始地址0xc200-0000，共20块，块大小16KB，）；
            arm：从共享内存中读取数据，写入disk。
           问题：共享内存块中出现的数据，与我从upp口送入的数据不一致，且数量有缺少。
           不知什么原因？烦请帮忙分析一下。
          代码如下：
         1）、arm申请共享内存块：

    /* heap for malloc list node */
    IHeap_Handle heap_node = (IHeap_Handle)SharedRegion_getHeap(SYS_CFG_SR_ID_LIST_HEAP);
    /* heap for malloc buffer for upp data */
    IHeap_Handle heap_data = (IHeap_Handle)SharedRegion_getHeap(SYS_CFG_SR_ID_UPP_HEAP);
    /* create data nodes */
    DataNode *nodes[SYS_CFG_LIST_NODES];
    int i;
    for (i = 0; i < SYS_CFG_LIST_NODES; i++) {
        DataNode *node = (DataNode *)Memory_alloc(heap_node, sizeof(DataNode), 0, NULL);
        UInt32* data = (UInt32 *)Memory_alloc(heap_data, SR_BUFFER_SIZE, 0, NULL);
        node->SR_buffer = SharedRegion_getSRPtr(data, SYS_CFG_SR_ID_UPP_HEAP);
        node->size = SR_BUFFER_SIZE;
        node->buffer_pitch = BUFFER_PITCH;
        node->buffer_height = BUFFER_HEIGHT;
        nodes[i] = node;
    }
    /* create free list */
    ListMP_Params params_list;
    ListMP_Params_init(&params_list);
    params_list.name = SYS_CFG_LIST_FREE;
    params_list.regionId = SYS_CFG_SR_ID_LIST_HEAP;
    ListMP_Handle list_free = ListMP_create(&params_list);
    for (i = 0; i < SYS_CFG_LIST_NODES; i++)   /* init free list */
  ListMP_putHead(list_free, (ListMP_Elem *)nodes[i]);
    /* create busy list */
    params_list.name = SYS_CFG_LIST_BUSY;
    ListMP_Handle list_busy = ListMP_create(&params_list);
 2）、arm等待数据块有效，并写入disk：

  /* get upp data from busy list and save them to file */
    while (! quit) {        while (ListMP_empty(list_busy) && ! quit)  // wait data            usleep(1000);
        if (quit)
            continue;
        /* get data node */
        DataNode *node = (DataNode *)ListMP_getTail(list_busy);
        /* get upp data */
        uint16_t *data = (uint16_t *)SharedRegion_getPtr(node->SR_buffer);
        LOG_DEBUG("data[0]=%x", data[0]);
        /* save upp data */
        file_saver_save(file_saver, (void *)data, node->size);
        /* make free node in free list again */
        ListMP_putHead(list_free, (ListMP_Elem *)node);
    }
    3）、dsp用dma方式从upp读入数据，放入共享内存：
static bool server_upp_data_transfer(Server *server) { if(server->ad_started == false) return true;
    while (ListMP_empty(server->list_free))  /* wait */
        Task_sleep(10000);
    DataNode *node = (DataNode *)ListMP_getTail(server->list_free); /* get free node */
    int *data = (int *)SharedRegion_getPtr(node->SR_buffer);
    server->transposeParA.WindowAddress     = (unsigned int *)data;  /* set taget */
    server->transposeParA.LineCount   = node->buffer_height;
    server->transposeParA.ByteCount   = node->buffer_pitch;    server->transposeParA.LineOffsetAddress = node->buffer_pitch;
    upp_error_count = 0;
    upp_dmai_int_cut = 0;
    /* fill in data */
    uPPDMATransfer(SOC_UPP_0_REGS, uPP_DMA_CHI, &server->transposeParA);
    /* wait */
    while (upp_dmai_int_cut < 1 && upp_error_count == 0);
    if (upp_error_count != 0) {
        LOG_ERROR("data mismatch in buffers");
        LOG_ERROR("upp_error_count=%d",upp_error_count);
    }
    /* make data node in busy list */
    ListMP_putHead(server->list_busy, (ListMP_Elem *)node);
    return true;
}
……………………………….
3.
我从upp口重复发数据48kB给dsp，从arm端检查共享内存中的数据，第一次发送的数据没有，第二次发送的数据，只有第一块（16KB/一块；正确时应当收到3块）。
不知什么原因？

Denny%20Yang99373：

感觉问题有几点

1，能否确认UPP的DMA传输正确？这块可以把ARM取数去掉，用DSP来校验一下UPP的数据

2，有没有可能与cache有关？如果开cache了，先把cache关掉试试