Write a code on STM32CUBEmx board STM32F407GVx, to toggle LEDs at every 1 second by using a timer,4 external interrupts when the external button connected to one of external interrupt is pressed it will disable other external IRQ, Led that is connected to it will be on for 20 seconds then on the last 10 seconds led will toggle at every 0.5 seconds and buzzer will be on using PWM repeat this for other interrups.

Start External IRQ 1 ISR of user 1 *Disable other external (RGS (EXTI-IMR) la The user's led will be on for 20s. Other leds will be off a The led will toggle at main Toggle leds at every is by every 0.5s at the using timer External mae last los. q Buzzer will be on with PWM. a Enable all iRQ Eras ISR of user 2 Similar ... Roh ISR of User 3 Similar ... ISR of users Similar