topic Re: GPIO control in MQX in MQX Software Solutions

GPIO control in MQX

admin — Fri, 19 Feb 2010 17:37:22 GMT

Hi,

I would like to avoid that MQX RTOS controls all pins, I would like to control directly some pins without interacting of MQX. I have to control some pins immediately without wait fopen and ioctl. This venture is it too dangerous? Are there problems of MQX instability if I modify library for doing this operation?

Thanks

Re: GPIO control in MQX

JuroV — Fri, 19 Feb 2010 19:47:01 GMT

Hi. There is nothing to be dangerous, it is one of ways of handling pins in MQX with ColdFire.

Re: GPIO control in MQX

admin — Fri, 19 Feb 2010 21:56:44 GMT

Hi JuroV !

for disabling the MQX command of a one port I have modify the structure gpio_global_pin_map. Is the right way or I have to modify the code in other locations ?

Thanks for the support

Re: GPIO control in MQX

JuroV — Thu, 25 Feb 2010 21:22:32 GMT

Can you please explain, what does 'disabling the MQX command of a one port' mean?

You want GPIO driver not to control some port? If this is the case, then the answer is: forget about that, modifying pin_map structure is prohibited and can lead to unexpected results.

Re: GPIO control in MQX

admin — Thu, 04 Mar 2010 20:54:40 GMT

I want GPIO driver don't control some port ... I can't do this and if I have to control some port immediatly (microsec) ?!?!?

Re: GPIO control in MQX

JuroV — Mon, 08 Mar 2010 22:21:01 GMT

You can't do that. Use your own direct GPIO register addressing in the application.