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PB1 and PA1 are using the same EXT1?

Question asked by Carter Lee on Oct 17, 2017
Latest reply on Oct 18, 2017 by Uwe Bonnes

Hi.

I'd like to use external interrupt PA1 nad PB1 pin.

But I found the following image, I think I can't use the external interrupt PA1 and PB1. Probably I think I have to  use only one to interrupt set.

Can I separately set to the one EXTIx?

 

because before system already use PB1 for external interrupt 

/* PB1 is connected to EXTI_Line0 :: Configuration AFIO_EXTICRx */
GPIO_EXTILineConfig(GPIO_PortSourceGPIOB, GPIO_PinSource1);

/* EXTI Line0 Configuration */
EXTI_InitStructure.EXTI_Line = EXTI_Line1;
EXTI_InitStructure.EXTI_LineCmd = ENABLE; /* Enable interrupt */
EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt; /* Interrupt mode */
EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Rising;
EXTI_Init(&EXTI_InitStructure);

/* Enable and set EXTI0 Interrupt to the lowest priority */

NVIC_InitStructure.NVIC_IRQChannel = EXTI1_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0x01;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0x01;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);

 

 

 

but I want to add another external interrupt PA0,PA1,PA2,PA3. in this situation, what am I supposed to do ?

 

 

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