I can not use HalUARTWrite to print long string. Do you have any idea ?

Which Z-Stack example do you test UART code?

I use "SampleLight" in Z-Stack Home 1.2.2a.44539

SampleLight enable UART and runs MT command by default. If you connect UART tool such as putty or teraterm, you should see output on it when SampleLight starts, don't you?

Yes, I do. I saw many strings be printed from SampleLight. But I would like to print some extra message. It work when I print with short char[] , but not working with long string.

I think your long string size is larger than UART TX buffer. Why do you send such a long string in one single TX write?

Because I want to print string to match my syntax in serial program that I wrote by Python on computer.

static void zclSampleLight_IdentifyQueryRspCB(  zclIdentifyQueryRsp_t *pRsp )
{
  
  char msgPrint[50];
  sprintf(msgPrint,"CMD{\"CMD\":\"IDENTIFYQ\",\"SRCADDR\":\"0x%x\"}\r\n",pRsp->srcAddr->addr.shortAddr);
  HalUARTWrite(MT_UART_DEFAULT_PORT, msgPrint, strlen(msgPrint));
  
  (void)pRsp;
#ifdef ZCL_EZMODE
  {
    zclEZMode_ActionData_t data;
    data.pIdentifyQueryRsp = pRsp;
    zcl_EZModeAction ( EZMODE_ACTION_IDENTIFY_QUERY_RSP, &data );
  }
#endif
}

Here is the code when I get IdentifyQueryRsp after sending a IdentifyQuery. I use break point to debug. If my network has 6 nodes.

The Yellow line is reached 6 times. But there is only 3 node be printed out.

And the other case, I also implement ZDO_IEEEAdddress_REQ with REQTYPE = 1 to query associated child and my string is long too.

It face the same problem like the upper case. 

Do you have any ideal ?

Can I increase the size of UART TX Buffer ?

Or Is there another way to wait until it print all string in buffer ? After that, we can send the other string for printing.

Best Regards,

Supakorn

Try to remove MT_TASK from compiler option and test again.

I tried to remove MT_TASK from compiler option. But there is an error while IAR was compiling.

Actually, In my project. I can not remove MT_TASK because I handle  uartConfig.callBackFunc in MT_UART file to get incoming message from RX uart.

Why can't  I just increase buffer ?

I don't understand why it have to store string on buffer before printing.

(For improving my general knowledge. Could you explain to me how is working?)

Best regards,

Supakorn

How many seconds in each rounds does z-stack process and clear this buffer ?

Best regards,
Supakorn

I have no idea about this timing.

I try to change MT_UART_TX_BUFF_MAX. But IAR show me some warning. How can I fix it ?

I do the same modification but don't get compile error.

You are welcome and it's good to know your problem is solved.