CC2640 – 送GATT notification msg 2字元會error

您好

我想cc2640走BT透過SimpleProfile_SetParameter()送data到pc tool讀取，

但我發現當送2個字元時會失敗，而其它長度的值都成功，以下測試說明：

SimpleProfile_SetParameter(SIMPLEPROFILE_CHAR6, 1, "a");    // pc端能正常讀到"a"

SimpleProfile_SetParameter(SIMPLEPROFILE_CHAR6, 2, "ab");  // pc端讀不到

SimpleProfile_SetParameter(SIMPLEPROFILE_CHAR6, 3, "abc"); // pc端正常讀到"abc"

SimpleProfile_SetParameter(SIMPLEPROFILE_CHAR6, 4, "abcd"); // pc端正常讀到"abcd"

一路往下追：

    –> GATTServApp_ProcessCharCfg() //simpleProfileChar6 have data "ab"

    –> gattServApp_SendNotiInd() //pAttr->pValue have data "ab"

    –> GATT_Notification() //&noti, noti.pValue have data "ab"

    –> gattIndNoti() //msg->pIndNoti->handleValueNoti.pValue = "ab"

    –> sendWaitMatchCS()// 無法往下追了

是否有idea??

Yue TANG：

SIMPLEPROFILE_CHAR6 你自己加的吧？ 他的value指向的是一个数组吗？

kuo austin：

回复 Yue TANG:

您好

是的，simpleProfileChar6[20] = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0};

         SIMPLEPROFILE_CHAR6_LEN = 20;

SimpleProfile_SetParameter(SIMPLEPROFILE_CHAR6, 2, "ab");會跑以下case

static gattCharCfg_t *simpleProfileChar6Config;

bStatus_t SimpleProfile_SetParameter( uint8 param, uint8 len, void *value )

{

   case SIMPLEPROFILE_CHAR6:   if ( len <= SIMPLEPROFILE_CHAR6_LEN )  //len = 上面function帶的2   {      notiChar6Len = len;      VOID memcpy( simpleProfileChar6, value, len );

      // See if Notification has been enabled      GATTServApp_ProcessCharCfg( simpleProfileChar6Config, simpleProfileChar6, FALSE,      simpleProfileAttrTbl, GATT_NUM_ATTRS( simpleProfileAttrTbl ),      INVALID_TASK_ID, simpleProfile_ReadAttrCB );   }

}

搞不懂為何只有兩字元會失敗，也比較過送1字元/兩字元/三字元皆有送下去gattIndNoti()