Counting heart rate over a period of time

Posted on December 03, 2015 at 13:04

Hi all,

I am doing a project to count heart rates. My heart rate device gives a digital output, which I plan to feed into PC2 pin of my STM32f1. My problem though, is calculating the heart rate using this digital input. Here is what I need to do:

1. I need to create a 5 second time period, in which the input is counted when high.

2. I need to then multiply the count with 12 after this 5 second time period to display on the LCD.

3. I will need the 5 second time period to start again, once it finishes.

I do know I have to use timers and interrupts to do this, but unfortunately I am using the STM32 for the first time. If someone could help me with a sample code, I would be obliged. Thank in advance.