Stm8s003k3 temperature measurement

[KRiaz.1]

Hi  Everyone,

I am using Stm8s003k3 to measure the temperature of three different places. Then displaying each temperature on 3 digits 7-segment display (3 of them to show each temperature separately). Now to display the temperature on all 3 seven segments I need to put them in the main loop and then the code should be executed without delay otherwise it will Dim the displays. My problem is I need to perform calculations and some other tasks if do those there is a delay and so my display got Dim any solution recommended how do I display temperature on all three displays while performing other tasks as well?

[Michal Dudka · Accepted solution]

I suppose that you have multiplexed display ( https://en.wikipedia.org/wiki/Multiplexed_display ). Setup timer to generate periodic interrupt (for example 1ms). Handle multiplexing in interrupt service routie. Then you can do anything in main loop without disturbing the display managment.

[KRiaz.1]

Hi Michal 
First of all, thank you for the reply. I can do the basic coding right. is there any example or any exemplary code so that i can just lear how to create interrupts? 

[Michal Dudka]

Yes. But depends on your compiler. For example:
https://blog.junix.in/2018/01/20/stm8s-timer2-with-overflow-interrupt/
http://www.benryves.com/tutorials/stm8s-discovery/
https://www.fypsolutions.com/examples/stm8s-external-interrupt-example/
https://hw-by-design.blogspot.com/2018/07/stm8-alternative-irq-vectors-declaration.html
https://blog.mark-stevens.co.uk/category/stm8/
...

[KRiaz.1]

Hi Michal, I am using cosmic c with stvp. I have read all the vlogs that Mr.Junaid posted and I was able to compile all of them but when I try to compile interrupt code It does not recognize the

void timer_isr() __interrupt(TIM2_OVF_ISR)
{
PB_ODR ^= 1 << PB5;
TIM2_SR1 &= ~(1 << TIM2_SR1_UIF);
}

this method I have defined the addresses of registers and added 

#include "stm8s.h"
#include "stm8s_gpio.h"
#include "stm8s_tim2.h"
#include "stm8s_exti.h"

this library but still the same. Can you please guide me what i am missing here 

#include <stdint.h>
#include <stm8s.h>

void timer_isr() __interrupt(TIM2_OVF_ISR)
{
PB_ODR ^= 1 << PB5;
TIM2_SR1 &= ~(1 << TIM2_SR1_UIF);
}

void main() {
enable_interrupts();

PB_DDR |= 1 << PB5; /
PB_CR1 |= 1 << PB5;
TIM2_PSCR = 0b00000111;
TIM2_ARRH = reload_value >> 8;
TIM2_ARRL = reload_value & 0x00FF;

TIM2_IER |= (1 << TIM2_IER_UIE);
TIM2_CR1 |= (1 << TIM2_CR1_CEN);

while (1) {
// do nothing
}
}