关于蓝牙芯片通知与读的区别

只看该作者 · 2020-11-7 15:37

在CH573的主机例程中，read和receive noti有什么区别呀，为什么要分成两个部分？

只看该作者 · 2020-11-7 15:37

static void centralProcessGATTMsg( gattMsgEvent_t *pMsg )
{
  if ( centralState != BLE_STATE_CONNECTED )
  {
// In case a GATT message came after a connection has dropped,
// ignore the message
return;
  }

  if ( ( pMsg->method == ATT_EXCHANGE_MTU_RSP ) ||
   ( ( pMsg->method == ATT_ERROR_RSP ) &&
      ( pMsg->msg.errorRsp.reqOpcode == ATT_EXCHANGE_MTU_REQ ) ) )
  {
if ( pMsg->method == ATT_ERROR_RSP )
{
   uint8 status = pMsg->msg.errorRsp.errCode;

   PRINT( "Exchange MTU Error: %x\n", status );
}
centralProcedureInProgress = FALSE;
  }

  if ( pMsg->method == ATT_MTU_UPDATED_EVENT )
  {
PRINT("MTU: %x\n",pMsg->msg.mtuEvt.MTU);
  }

  if ( ( pMsg->method == ATT_READ_RSP ) ||
   ( ( pMsg->method == ATT_ERROR_RSP ) &&
      ( pMsg->msg.errorRsp.reqOpcode == ATT_READ_REQ ) ) )
  {
if ( pMsg->method == ATT_ERROR_RSP )
{
   uint8 status = pMsg->msg.errorRsp.errCode;

   PRINT( "Read Error: %x\n", status );
}
else
{
   // After a successful read, display the read value
   PRINT("Read rsp: %x\n",*pMsg->msg.readRsp.pValue);
}
centralProcedureInProgress = FALSE;
  }
  else if ( ( pMsg->method == ATT_WRITE_RSP ) ||
   ( ( pMsg->method == ATT_ERROR_RSP ) &&
      ( pMsg->msg.errorRsp.reqOpcode == ATT_WRITE_REQ ) ) )
  {

if ( pMsg->method == ATT_ERROR_RSP )
{
   uint8 status = pMsg->msg.errorRsp.errCode;

   PRINT( "Write Error: %x\n", status );
}
else
{
   // Write success
   PRINT( "Write success \n" );
}

centralProcedureInProgress = FALSE;

  }
  else if ( pMsg->method == ATT_HANDLE_VALUE_NOTI )
{
PRINT("Receive noti: %x\n",*pMsg->msg.handleValueNoti.pValue);
}
  else if ( centralDiscState != BLE_DISC_STATE_IDLE )
  {
centralGATTDiscoveryEvent( pMsg );
  }
  GATT_bm_free(&pMsg->msg, pMsg->method);
}

只看该作者 · 2020-11-7 15:58

阳仔很无奈发表于 2020-11-7 15:37
static void centralProcessGATTMsg( gattMsgEvent_t *pMsg )
{
if ( centralState != BLE_STATE_CONNECT ...

read 是主机主动去发消息读从机的值，读的是根据主机发的命令返回的值
notify是从机主动发起的通知

只看该作者 · 2021-1-10 19:18

很棒棒哦，值得学习