GPIO_EXTI block

This block implements GPIO EXTI interrupt global functionality.

Contents

• GPIO_EXTI Block display
• GPIO_EXTI Block parameters
• Explain outputs
• CubeMX settings

GPIO_EXTI Block display

GPIO_EXTI Block parameters

• Line – External Interrupt Line (from 0 to 15)
• Port – port of pin EXTI use as External Interrupt Line
• Select Edge – select External Interrupt Line Mode trigger detection

Explain outputs

• Select Edge „Rising” – one output as function call rising edge trigger detected
• Select Edge „”Falling” – one output as function call falling edge trigger deteced
• Select Edge „Rising/Falling” – two outputs. First: function call rising or falling edge trigger detected. Second: „1”- rising edge trigger detected, „0”- falling edge trigger detected

CubeMX settings

• Set GPIO PIN as GPIO_EXTIx
• In GPIO Configuration set „GPIO mode” as EXTI Rising or Falling or Rising/Falling edge trigger detection
• In NVIC Configuration -> NVIC table: set EXTI line x interrupt as Enabled
• In NVIC Configuration -> NVIC table: set EXTI line x interrupt as Enabledand set Preemption and Sub Priority
• In NVIC Configuration -> Code generation table: set EXTI line x interrupt to generate IRQ handler