PSoC 5, 3 & 1 MCU

[Anonymous]

Hello everyone,

   

On my PSoC I have 2 interrupts one at 2000Hz and one at 100Hz as you can see in attachment.

   

In the first interrupt ISR_Dyna I ask datas via UART at 460000 Baud 

   

In the second interrupt ISR_Stat I ask others datas via the same UART at 460000 Baud 

   

My problem is that I can't have both interrupt at same time because I receive data by UART Interrupt and if ISR_Dyna is asking datas  and ISR_Stat is asking Data at the same time there will be conflicts and I will be stuck in my sequencer.

       

So to avoid that in my code I do Start and Stop each Interrupt, but I don't know if its the best way to do it?

   

Actually I made a mistake in my code and it was workingbut I don"t understand why.

   

My code was:

   

if(countMain==100){ // ask datas at 2000Hz                    
        isr_dyna_Stop();                        //
        isr_stat_StartEx(dynamique);            //
        }
if (countMain==115){ // ask datas at 100Hz
        isr_dyna_Stop();                        //
        isr_stat_StartEx(statique);             //
        }

       

And as you can see my mistake is instead of write  

   

isr_stat_Stop();
 isr_dyna_StartEx(dynamique);

   

 I wrote in the first If

   

isr_dyna_Stop();                        //
isr_stat_StartEx(dynamique);            //

       

So my code work with the mistake and I don't understand why,and if I correct my mistake, it work 3-4 time and after it stucks.

       

Thank you

[HeLi_263931 · Accepted solution]

Two interrupts of the same priority won't run at the same time. So there is no need to disable/enable one. The ISR that comes second will just wait until the first one finishes.

[odissey1]

Since it is a fixed ratio 20/1, and single UART channel, it would be prudent to have only one 2000Hz interrupt, counting 0-20, and on 20th time to request both infos. Hard to say more without seeing the code.