Kinetis Microcontrollers中的主题 Re: KE04z UART IRQ receive problem.

KE04z UART IRQ receive problem.

grochal7 — Thu, 01 Feb 2018 13:17:29 GMT

Hello,

i initialize my UART and send some data from board to putty. It works fine.

I can send data from ke04z to putty.

I try send some character from putty to my board.
Always the same:

It is some problem with my receive irq. When RX irq occures - mcu stops on IntDefaultHandler.

How to set my RX irq correctly?

I tried to use library (sdk) and change it, still the same.

(I cant use SDK examples cause it is to big for my uC)

Regards!

Re: KE04z UART receive problem. Set OR flag (Receiver Overrun Flag)

mjbcswitzerland — Thu, 01 Feb 2018 13:44:49 GMT

Hi Tomasz

Do you use interrupts for transmission?

The KE04 shares an interrupt vector for Tx and Rx so if you are using Tx interrupts (that are working) the problem is not with the UART vector but it may be a hard fault (without a handler) due to how the rx data is being handled.

If you don't use Tx interrupts it is presumably due to there being no UART vector installed for it.

Regards

Mark

Re: KE04z UART receive problem. Set OR flag (Receiver Overrun Flag)

grochal7 — Thu, 01 Feb 2018 14:24:40 GMT

Hi Mark!

I use interrupts only for receiving.

My code is similar to the uart_interrupt example from SDK.

I receive characters from putty with interrupt method and send it to putty without interrupts (echo).

I initialize uart, and then set:

/* Enable RX interrupt. */
UART_EnableInterrupts(UART, kUART_RxDataRegFullInterruptEnable | kUART_RxOverrunInterruptEnable);
// EnableIRQ(DEMO_UART_IRQn);
NVIC->ISER[0U] = (uint32_t)(1UL << (((uint32_t)(int32_t)UART_IRQ_ID) & 0x1FUL));

It is ok?

Thanks!

Re: KE04z UART IRQ receive problem.

mjbcswitzerland — Thu, 01 Feb 2018 16:04:07 GMT

Tomasz

What is your interrupt handler called and how have you entered it into the vector table?

Regards

Mark

Re: KE04z UART IRQ receive problem.

grochal7 — Fri, 02 Feb 2018 08:01:12 GMT

Mark,

thank U for help!

I found it.

I used "UART_IRQHandler" , not "UART0_IRQHandler" -.-

Regards!