topic Re: UART Interrupt in MQX Software Solutions

UART Interrupt

UB39 — Thu, 03 Nov 2011 21:44:30 GMT

I used the UART3 connector to exchange data between PC an kinets K60 Tower.

Without MQX I ve no problems to read the data via interrupt. Now I try to do the same inside a MQX project.

I used the same interrupt routine as bevore and I exchange the command

enable_irq(51);

with

_int_install_isr(INT_UART3_RX_TX, isr_uart3,isr_ptr);

but I never jump into the isr. The initialization of the UART3 cannot be the problem, cause I used the same routine as in my former non MQX project and a comparison of the register settings shows the same. And I can read the UART receive data by polling. But fortunately my application need a interrupt solution.

I tried the isr example in the mqx directory without problems. In the isr example project there s no problem in jumping to the isr routine.

Instead of

_int_install_isr(INT_UART3_RX_TX, isr_uart3,isr_ptr);

I tried

_int_install_isr(51,isr_uart3,isr_ptr);

_int_install_isr(67,isr_uart3,isr_ptr);

and many different other numbers, everything without success.

I read in the forum, that maybe the settings for BSPCFG_ENABLE_ITTYA

BSPCFG_ENABLE_ITTYB

BSPCFG_ENABLE_ITTYC

BSPCFG_ENABLE_TTYA

BSPCFG_ENABLE_TTYB

BSPCFG_ENABLE_TTYC

might be the problem. But I tried many different combinations of 1 or 0 and recompile the BSP project, but everything without success.

So I hope you can help me?

Many thanks

Ulf

Re: UART Interrupt

petr_uhlir — Thu, 03 Nov 2011 23:05:54 GMT

UART3 is mapped into TTYD device in MQX. If you would like to use MQX serial driver you can remap default serial console from OSJTAG to TWR-SER uart with using interrupt mode by adding following lines into user_config.h.

#define BSPCFG_ENABLE_TTYD 0

#define BSPCFG_ENABLE_ITTYD 1

#define BSP_DEFAULT_IO_CHANNEL "ittyd:" /* TWR-SER interrupt mode */

#define BSP_DEFAULT_IO_CHANNEL_DEFINED

Other parameters as baud rate ,.... can be changed in init_sci.c file. Then recompile BSP and your application and you can test it. Run hello example application and it will print "Hello World" message into UART3 in interrupt mode.

Re: UART Interrupt

UB39 — Fri, 04 Nov 2011 15:50:42 GMT

That s the solution!

Many Thanks

Ulf