EXTI0_1_IRQ and EXTI4_15_IRQ don't work independent ?

[andrey2richter]

Posted on November 04, 2017 at 22:25

Hello everybody,

I use two interrupts in the STM32F051K4 MCU.

There are EXTI0_1_IRQ and EXTI4_15_ORQ.

With EXTI0 will be PA0 used (Hall sensor) and to EXTI4_15 are PB5, PB6, PB7 Pins (user keys) connected.

Both interrupts work independently very well, but wenn I try to use EXTI0 and EXTI4_15 together (any key will be pressed and EXTI4_15 ocurred) break EXTI0 to work.

My question is : can I use by STM32F051K4 different Ports for for different EXTI-Lines ? For example in my case I use PA0 for EXTI0_1 Interrupt and PB7, PB6, PB5 for EXTI4_15 Interrupt.

Thank you for your help!

.

Initialisation code listed below:

void exti_exti0_1Config(void)
{
 /* Enable GPIOA clock */ // already done in gpioctrl.c
 //RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOA, ENABLE);
 
 /* Enable SYSCFG clock */
 RCC_APB2PeriphClockCmd(RCC_APB2Periph_SYSCFG, ENABLE);

 /* Configure PA0 */
 GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0;
 GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN;
 GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;
 GPIO_Init(GPIOA, &GPIO_InitStructure);
 
 /* Connect EXTI0 to pin Sensor Event*/
 SYSCFG_EXTILineConfig(EXTI_PortSourceGPIOA, EXTI_PinSource0);

 /* Configure EXTI0 line */
 EXTI_InitStructure.EXTI_Line = EXTI_Line0;
 EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;
 EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Rising_Falling;
 EXTI_InitStructure.EXTI_LineCmd = ENABLE;
 EXTI_Init(&EXTI_InitStructure);

 /* Enable and set EXTI0 Interrupt */
 NVIC_InitStructure.NVIC_IRQChannel = EXTI0_1_IRQn;
 NVIC_InitStructure.NVIC_IRQChannelPriority = 0x2;
 NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
 NVIC_Init(&NVIC_InitStructure);
}

void exti_exti4_15Config(void)
{
 /* Enable GPIOB clock */
 //RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOB, ENABLE);
 /* Enable SYSCFG clock */
 RCC_APB2PeriphClockCmd(RCC_APB2Periph_SYSCFG, ENABLE);

 /* Configure PB7, PB6, PB5 pin as input floating */
 GPIO_InitStructure.GPIO_Pin = GPIO_Pin_7 | GPIO_Pin_6 | GPIO_Pin_5;
 GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN;
 GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;
 GPIO_Init(GPIOB, &GPIO_InitStructure);
 
 /* Connect EXTI7, 6, 5 Line to PB7, PB6, PB5 pin Sensor Event*/
 //SYSCFG_EXTILineConfig(EXTI_PortSourceGPIOB, EXTI_PinSource7 | EXTI_PinSource6 | EXTI_PinSource5);
 SYSCFG_EXTILineConfig(EXTI_PortSourceGPIOB, EXTI_PinSource7);
 SYSCFG_EXTILineConfig(EXTI_PortSourceGPIOB, EXTI_PinSource6);
 SYSCFG_EXTILineConfig(EXTI_PortSourceGPIOB, EXTI_PinSource5);

 /* Configure EXTIx line */
 EXTI_InitStructure.EXTI_Line = EXTI_Line7 | EXTI_Line6 | EXTI_Line5;
 EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;
 EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Falling;
 EXTI_InitStructure.EXTI_LineCmd = ENABLE;
 EXTI_Init(&EXTI_InitStructure);

 /* Enable and set EXTI1 Interrupt */
 NVIC_InitStructure.NVIC_IRQChannel = EXTI4_15_IRQn;
 NVIC_InitStructure.NVIC_IRQChannelPriority = 0x3;
 NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
 NVIC_Init(&NVIC_InitStructure);
}

void EXTI0_1_IRQHandler(void)
{
 NVIC_DisableIRQ(EXTI0_1_IRQn);
 
 // Hall1 signal
 if(EXTI_GetITStatus(EXTI_Line0) != RESET)
 {
 /* Clear the EXTI line 5 pending bit */
 EXTI_ClearITPendingBit(EXTI_Line0);
 
 switchVar = ~switchVar; // just for debugging purpose
 if(switchVar)
 { 
 GPIOA->BSRR |= GPIO_Pin_12; // set green LED on
 }
 else
 { 
 GPIOA->BRR |= GPIO_Pin_12; // set green LED on
 }
 }
 
 // Hall2 signal
 if(EXTI_GetITStatus(EXTI_Line1) != RESET)
 {
 /* Clear the EXTI line 6 pending bit */
 EXTI_ClearITPendingBit(EXTI_Line1);
 
 // To Do: clear blockade timer der auf ca. 180 - 200ms eingestellt ist
 //sw_getSwCtrl()->flHall2Ev = 1;
 }
 NVIC_EnableIRQ(EXTI0_1_IRQn);
}

void EXTI4_15_IRQHandler(void)
{
 NVIC_DisableIRQ(EXTI4_15_IRQn); // IRQ will bei in keyctrl.c Module enabled
 if(EXTI_GetITStatus(EXTI_Line5) != RESET)
 {
 /* Clear the EXTI line 5 pending bit */
 EXTI_ClearITPendingBit(EXTI_Line5);
 // set key press flag as TRUE
 key_getKeyCtrl()->biKeyPresRelInt = TRUE;
 }
 
 if(EXTI_GetITStatus(EXTI_Line6) != RESET)
 {
 /* Clear the EXTI line 6 pending bit */
 EXTI_ClearITPendingBit(EXTI_Line6);
 // set key press flag as TRUE
 key_getKeyCtrl()->biKeyPresRelInt = TRUE;
 }
 
 if(EXTI_GetITStatus(EXTI_Line7) != RESET)
 {
 /* Clear the EXTI line 7 pending bit */
 EXTI_ClearITPendingBit(EXTI_Line7);
 // set key press flag as TRUE
 key_getKeyCtrl()->biKeyPresRelInt = TRUE;
 }
 
 // IRQ will bei in keyctrl.c Module enabled
 //NVIC_EnableIRQ(EXTI4_15_IRQn);
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#stm32f051 #exti0 #exti4_15

[waclawek.jan]

Posted on November 05, 2017 at 17:15

Can't this be a hardware problem, e.g. can't pressing the button cause a glitch at the hall output?

Btw. there's no need to disable/enable interrupt inside the ISR.

JW

[andrey2richter]

Posted on November 05, 2017 at 19:24

Hallo Jan,

thank you for suggested solution !

Today I had been tested the source code (exactly like shown above) of the both interrupts (EXTI0 and EXTI4_15) in a new project. Two keys with pull-up resistors was connected to PA0 and PB7 for interrupt simulations.

To my surprise, I can confirm, that both interrupts work together without any problems !!!

The initialiston code listed above is correct and EXTI hardware work properly.

It seems that the bug is hiding any where else in the source code...

Hereby the topic can be closed.

Best regards

Andrey