STM8S003F3P6 UART1 and EXTERNAL INTERRUPT ISSUE..

[Chayan Roy]

Posted on January 02, 2018 at 10:04

The original post was too long to process during our migration. Please click on the attachment to read the original post.

[raimond]

Posted on January 02, 2018 at 11:03

PD1 is SWIM. Are you sure  about using the SWIM pin in your application?

Anyway, for using it as GPIO you should disable the SWIM functionality first.

[Chayan Roy]

Posted on January 02, 2018 at 11:58

Hello

Dragomir.Raimond

,

Thanks for your reply. Now, we have been using this swim pin,as General I/O,without disabling the swim function for last 1year, in our many application, we haven't faced any problem yet. Another thing is that I cannot disable the sim functionality,as we often need to reprogram the MCU after final testing. But as you have suggested, I will try disabling the swim pin. But in the code swim has nothing to do with the IR decoding and UART1.RX reception. I am trying to solve this issue, still working on,but haven't got any success.

[raimond]

Posted on January 02, 2018 at 13:08

Hi,

unfortunately your code is hard to follow. I don't know how you pasted it in here...

Anyway, there are weird things like:

PD_ODR ^=(1<<6);

in you PortD EXTI interrupt. (PD6 is UART RX).

Also, in the uart init code you have some weird things also, like:

UART1_CR2=(1<<5);

UART1_CR2=(1<<2);

The thing is, in such a mess you can easily slip a mistake even yourself. I can understand why you are doing what you are doing, but don't expect anyone else to follow your code in such a state.

[Chayan Roy]

Posted on January 02, 2018 at 17:41

Sorry for this messy  code, next time I'll try to properly paste the code.

I have checked all those things you have  mentioned. And also disabled the swim interface. I have  red the datasheet, according to that code should work, but When ever  I attach  IR sensor, UART doesn't work.

I have checked at the hardware level..but everything is ok there. I don't know why it is not working. Thanks.