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Отладочная плата STM32F407 Discovery kit, на которой камень stm32407VG.
Собственно проблема в следующем - кнопка "Пользователь" подвязана к порту PA0, и я по ней делаю прерывания...
Проблема в том, что даже если указатель прерывания SYSCFG->EXTICR[0] |= 0x00; изменить, скажем, на SYSCFG->EXTICR[0] |= 0x01; то даже в этом случае прерывание происходит...
Подскажите где копать, так как мне не понятно, как кнопка, которая физически впаяна в плату, прошивается как причина EXTI0
#include "stm32f4xx.h" // Device header
//#include "Main.h" // Device header
int n;
static unsigned D; // TEMP for read value
uint32_t ad [1] = {1};
//********************************************************************************************//
//-----------------------------------CUSTOMER FUNCTIONS---------------------------------------//
void delay(int n)
{
while(n>0) n--;
}
//-----------------------------------ACTIVATE PORTS AS INPUT/OUTPUT--------------------------//
void PORTA (void)
{
RCC->AHB1ENR |= RCC_AHB1ENR_GPIOAEN;// switch on tackting PORTA
GPIOA->MODER |=0x00; //32 bit for 16 inputs for 16 input 0x40000000, for 15 input 0x10000000...for 1 input 0x01. Means 01 for ech two bits if input
GPIOA->OTYPER |=0x00; //16 bit for 16 inputs for 16 input. Means 0 OR 1 for ech bits if use OR not use internal resistor
GPIOA->OSPEEDR |=0x00; //32 bit for 16 inputs. Means 00 for LOW speed or 01 for MEDIUM or 10 for HIGH or 11 for VERY HIGH speed
GPIOA->PUPDR |=0x02; //32 bit for 16 inputs. Means 00 for no pulup/puldown resistor or 01 for pulup or 10 for puldown or 11 RESERVED
}
void PORTC (void)
{
RCC->AHB1ENR |= RCC_AHB1ENR_GPIOCEN;// switch on tackting PORTC
}
void PORTD (void)
{
RCC->AHB1ENR |= RCC_AHB1ENR_GPIODEN;// switch on tackting PORTA
GPIOD->MODER |=0x55000000; //32 bit for 16 inputs for 16 input 0x40000000, for 15 input 0x10000000...for 1 input 0x01. Means 01 for ech two bits if input
GPIOD->OTYPER |=0x00; //16 bit for 16 inputs for 16 input. Means 0 OR 1 for ech bits if use OR not use internal resistor
GPIOD->OSPEEDR |=0x00; //32 bit for 16 inputs. Means 00 for LOW speed or 01 for MEDIUM or 10 for HIGH or 11 for VERY HIGH speed
GPIOD->PUPDR |=0x00000000; //32 bit for 16 inputs. Means 00 for no pulup/puldown resistor or 01 for pulup or 10 for puldown or 11 RESERVED
D=GPIOD->IDR; //16 bit for 16 inputs. USED ONLY for READ STATUS, which is set as INPUT
GPIOD->ODR |=0x8000; //16 bit for 16 inputs for 16 input. Means 0 OR 1 for ech bits if use OR not use as output
GPIOD->BSRRL |=0x00; //16 bit for 16 inputs for 16 input. Means 0 OR 1 for ech bits if use OR not use SET as OUTPUT
GPIOD->BSRRH |=0x8000; //16 bit for 16 inputs for 16 input. Means 0 OR 1 for ech bits if use OR not use RESET as OUTPUT
GPIOD->LCKR |=0x00; //Lock or NOT lock configuration of the port bits. IMPORTANTE: Access: 32-bit word only, read/write register
//LOCK key write sequence:
// WR LCKR[16] = ‘1’ + LCKR[15:0]
// WR LCKR[16] = ‘0’ + LCKR[15:0]
// WR LCKR[16] = ‘1’ + LCKR[15:0]
// RD LCKR
// RD LCKR[16] = ‘1’ (this read operation is optional but it confirms that the lock is active)
// Note: During the LOCK key write sequence, the value of LCK[15:0] must not change.
// Any error in the lock sequence aborts the lock.
// After the first lock sequence on any bit of the port, any read access on the LCKK bit
// returns ‘1’ until the next CPU reset.
GPIOD->AFR[0] |=0x00;// AFRL
GPIOD->AFR[1] |=0x00;// AFRH
}
//********************************************************************************************//
//-----------------------------------System configuration controller--------------------------//
void SYSCFG_INITIAL (void)
{
SYSCFG->MEMRMP |= 0x00;// Main Flash memory mapped at 0x0000 0000
SYSCFG->PMC |= 0x00; //For 0x00 - MII interface is selected. Foir 0x01 - RMII PHY interface is selected.
}
//-----------------------------------ACTIVATE EXTERNAL INTERRUPT BELONG TO ACTION-------------//
void SYSCFG_INTERRUPT (void)
{
SYSCFG->EXTICR[0] |= 0x00;//These bits are written by software to select the source input for the EXTIx (from EXTI0-EXTI3) EXAMPLE 0000: PA[x] pin or 0001: PB[x] pin
//SYSCFG->EXTICR[1] |= 0x00;//These bits are written by software to select the source input for the EXTIx (from EXTI0-EXTI3) EXAMPLE 0000: PA[x] pin or 0001: PB[x] pin
//SYSCFG->EXTICR[2] |= 0x00;//These bits are written by software to select the source input for the EXTIx (from EXTI0-EXTI3) EXAMPLE 0000: PA[x] pin or 0001: PB[x] pin
//SYSCFG->EXTICR[3] |= 0x00;//These bits are written by software to select the source input for the EXTIx (from EXTI0-EXTI3) EXAMPLE 0000: PA[x] pin or 0001: PB[x] pin
//SYSCFG->CMPCR |= 0x00;//Compensation cell
//SYSCFG->EXTICR1->EXTI0 |=0x00;
//SYSCFG->EXTICR[0] = SYSCFG_EXTICR1_EXTI0_PA;
}
//-----------------------------------LOGIC FOR INTERRUPT ------------------------------------//
void EXTI0_IRQHandler (void)
{
/*----------------------------------------------*/
GPIOD->BSRRH =0xF000;
EXTI->PR |= 0x01; //Reset (for Event and Interrupt) for input line
}
//-----------------------------------SIGN UP EXTERNAL INTERRUPT TO BITS----------------------//
void SET_INTERRUPT (void)
{
EXTI->IMR |= 0x01; // Interrupt request from line EXTI_IMR0 is not masked
EXTI->EMR |= 0x01; // Event request from line EXTI_EMR0 is not masked
EXTI->RTSR |= 0x01; //Rising trigger enabled (for Event and Interrupt) for input line
EXTI->FTSR |= 0x01; //Falling trigger enabled (for Event and Interrupt) for input line
NVIC->ISER[0] |= 0x58;// EXTI0-> EXTI Line0 interrupt-> 0x0000 0058 (from datasheet)
}
//-----------------------------------MAIN PROGRAMM--------------------------//
int main (void)
{
n=4500000;
PORTA();
PORTC();
PORTD();
SYSCFG_INITIAL();
SYSCFG_INTERRUPT();
SET_INTERRUPT ();
while(1)
{
GPIOD->ODR =0xF000;
GPIOD->BSRRL =0xF000;
LOOP:
GPIOD->BSRRH =0x1000;
GPIOD->BSRRL =0x8000;
delay(n);
GPIOD->BSRRH =0x2000;
GPIOD->BSRRL =0x1000;
delay(n);
GPIOD->BSRRH =0x4000;
GPIOD->BSRRL =0x2000;
delay(n);
GPIOD->BSRRH =0x8000;
GPIOD->BSRRL =0x4000;
delay(n);
goto LOOP;
}
}
