DEBUG UART interrupt troubles

stdcerr — Mon, 18 Jan 2021 23:27:52 GMT

Hi,

We are using the DEBUG UART to send out data on a consecutive basis which worked just fine. Now we added a feature where we also want to receive some command characters so I added Interrupt control to the UART but it turns out, that when the program starts,m it first expects to receive a character before it starts sending out any data (which is not whast we want) also, it seems that it stop sending after every character I send from the terminal and only resumes when it receives an even number of chars.... why is this and how can I fix it?
My code looks like this:

//Macros #define DEBUG_UART UART0 #define DEBUG_UART_IRQn UART0_RX_TX_IRQn #define DEBUG_UART_IRQHandler UART0_RX_TX_IRQHandler //enabling the interrupt UART_EnableInterrupts(DEBUG_UART, kUART_RxDataRegFullInterruptEnable | kUART_RxOverrunInterruptEnable); EnableIRQ(DEBUG_UART_IRQn); //ISR void DEBUG_UART_IRQHandler(void) { uint8_t rxChar = 0U; /* If new data arrived. */ if ((kUART_RxDataRegFullFlag | kUART_RxOverrunFlag) & UART_GetStatusFlags(DEBUG_UART)) { rxChar = UART_ReadByte(DEBUG_PERIPHERAL); if(rxChar == '*') { toggleDebugging(); } else if (isDebugging()) { setMode(rxChar); } else { if(rxChar == '@'){ receivingCommandFlag = true; rxIndex = 0; inCommingFlag = false; }else if(receivingCommandFlag){ rxBuffer[rxIndex] = rxChar; rxIndex++; if(rxChar==0xa || rxChar==0xd){ inCommingFlag = true; } } } } SDK_ISR_EXIT_BARRIER; }

What is wrong or what am I missing? Any help is appreciated!

Re: DEBUG UART interrupt troubles

stdcerr — Tue, 19 Jan 2021 00:19:15 GMT

It seems like it might have to do something with UART_GetStatusFlags() as this is where it hangs when I suspend the session (while it doesn't send characters due to having received a single char). What's up with that, I'm confused!

The line looks like:

if ((kUART_RxDataRegFullFlag | kUART_RxOverrunFlag) & UART_GetStatusFlags(DEBUG_UART))

Re: DEBUG UART interrupt troubles

stdcerr — Tue, 19 Jan 2021 21:10:40 GMT

I think I found that the UART IRQ code works fine as posted but that the problem is caused by a different area in the code.

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DEBUG UART interrupt troubles

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