1. Power Source:
   • Assume V1, providing 5V, is your power source.
2. Resistor for Current Limiting:
   • Use R1 as a current-limiting resistor for each LED. The resistance is 500 ohms.
3. LED1 Connection:
   • Connect U1:PA0_WKUP to R1:1.
   • Connect R1:2 to LED1:A.
   • Connect LED1:K to GND.
4. LED2 Connection:
   • Connect U1:PA1 to R1:1.
   • Connect R1:2 to LED2:A.
   • Connect LED2:K to GND.
5. Microcontroller Power:
   • Connect V1:ANODE to U1:VDD1 and VDD2 (and other VDD pins).
   • Connect V1:CATHODE to GND and all VSS pins of the microcontroller.

C
#include "stm32f4xx.h"

// Initialization code here

void delay(int count) {
    while (count--) {
        for (int i=0; i < 1000; i++) {
          __asm("NOP");
        }
    }
}

int main(void) {
    // GPIO Initialization code here
    
    while (1) {
        // Toggle LEDs
        GPIOD->ODR ^= (1 << 0); // Toggle PA0
        GPIOD->ODR ^= (1 << 1); // Toggle PA1
        
        delay(1000);
    }
}