CC3235MODSF: How to manage DMA or UART manually in my application based on the at_commands example?

Hello, 

I do not use DMA and UART_readPolling for entering LPDS.

But it cause a problem sometimes that the cc3235 module seems to be stuck with uart receive processing.

So I revert code to use DMA and UART_readPolling and I'm trying to find a way to use LPDS.

My scenario is that,

1. Stop the 'while' process in ATCommands_readCmd() to stop UART_readPolling in the GetRawCmd() when the timer expired.

2. Call ATCommands_readCmd() when it wakes up from LPDS.

But it still cannot go into LPDS when the timer expired because of the DMA, I think.

So I need to initialize or de-initialize the DMA or UART in the timer callback and wakeup callback function.

How can I do that??

void timerCallback(Timer_Handle myHandle, int_fast16_t status)
{
  stopReadPolling = true;
  UART_disableRx();
  Power_enablePolicy();
}

void wakeupFromLPDS(uint_least8_t argument)
{
  stopReadPolling = false;
  Power_disablePolicy();
  UART_enableRx();
  timerStart();
  ATCommands_readCmd();
}

Thanks,

Calvin