CC2541每次接收时，都只能接收一包20个字节，如何接收多包数据？

/*********************************************************************
* @fn simpleProfileChangeCB
*
* @brief Callback from SimpleBLEProfile indicating a value change
*
* @param paramID - parameter ID of the value that was changed.
*
* @return none
*/
static void simpleProfileChangeCB( uint8 paramID )
{
uint8 newValue;
uint8 newChar6Value[SIMPLEPROFILE_CHAR6_LEN];
uint8 returnBytes;

switch( paramID )
{
case SIMPLEPROFILE_CHAR1:
SimpleProfile_GetParameter( SIMPLEPROFILE_CHAR1, &newValue, &returnBytes );

#if (defined HAL_LCD) && (HAL_LCD == TRUE)
HalLcdWriteStringValue( "Char 1:", (uint16)(newValue), 10, HAL_LCD_LINE_3 );
#endif // (defined HAL_LCD) && (HAL_LCD == TRUE)
break;

case SIMPLEPROFILE_CHAR3:
SimpleProfile_GetParameter( SIMPLEPROFILE_CHAR3, &newValue, &returnBytes );

#if (defined HAL_LCD) && (HAL_LCD == TRUE)
HalLcdWriteStringValue( "Char 3:", (uint16)(newValue), 10, HAL_LCD_LINE_3 );
#endif // (defined HAL_LCD) && (HAL_LCD == TRUE
break;

case SIMPLEPROFILE_CHAR6:
SimpleProfile_GetParameter( SIMPLEPROFILE_CHAR6, newChar6Value, &returnBytes );
if(returnBytes > 0)
{
if(simpleBLE_CheckIfUse_Uart2Uart()) //使用透传模式时才透传
{
NPI_WriteTransport(newChar6Value,returnBytes);
}
}
break;

default:
// should not reach here!
break;
}
}

假如需要接收100个字节，需要分5次接收的。

因为每次都只能进入一次对特征值的读写，怎么分开收取