/*  FeatherGpio_DigitalRead_Interrupt.ino - Feather GPIO Digital Read  Interrupt Test  Used to test the configuration of new boards added to the STM32 core.  modified 31 May 2024  by Zachary J. Fields*/staticbool a0 =false;staticbool a1 =false;staticbool a2 =false;staticbool a3 =false;staticbool a4 =false;staticbool a5 =false;staticbool d5 =false;staticbool d6 =false;staticbool d9 =false;staticbool d10 =false;staticbool d11 =false;staticbool d12 =false;staticbool d13 =false;staticbool user_btn =false;HardwareSerialstlinkSerial(PIN_VCP_RX, PIN_VCP_TX);voidISR_a0 (void) {  a0 =true;}voidISR_a1 (void) {  a1 =true;}voidISR_a2 (void) {  a2 =true;}voidISR_a3 (void) {  a3 =true;}voidISR_a4 (void) {  a4 =true;}voidISR_a5 (void) {  a5 =true;}voidISR_d5 (void) {  d5 =true;}voidISR_d6 (void) {  d6 =true;}voidISR_d9 (void) {  d9 =true;}voidISR_d10 (void) {  d10 =true;}voidISR_d11 (void) {  d11 =true;}voidISR_d12 (void) {  d12 =true;}voidISR_d13 (void) {  d13 =true;}voidISR_user_btn (void) {  user_btn =true;}// the setup function runs once when you press reset or power the boardvoidsetup() {// Initialize pins for GPIO TestspinMode(A0, INPUT_PULLUP);pinMode(A1, INPUT_PULLUP);pinMode(A2, INPUT_PULLUP);pinMode(A3, INPUT_PULLUP);pinMode(A4, INPUT_PULLUP);pinMode(A5, INPUT_PULLUP);pinMode(D5, INPUT_PULLUP);pinMode(D6, INPUT_PULLUP);pinMode(D9, INPUT_PULLUP);pinMode(D10, INPUT_PULLUP);pinMode(D11, INPUT_PULLUP);pinMode(D12, INPUT_PULLUP);pinMode(D13, INPUT_PULLUP);pinMode(USER_BTN, INPUT_PULLUP);// Attach InterruptsattachInterrupt(digitalPinToInterrupt(A0),       ISR_a0,       RISING);attachInterrupt(digitalPinToInterrupt(A1),       ISR_a1,       RISING);attachInterrupt(digitalPinToInterrupt(A2),       ISR_a2,       RISING);attachInterrupt(digitalPinToInterrupt(A3),       ISR_a3,       RISING);attachInterrupt(digitalPinToInterrupt(A4),       ISR_a4,       RISING);attachInterrupt(digitalPinToInterrupt(A5),       ISR_a5,       RISING);attachInterrupt(digitalPinToInterrupt(D5),       ISR_d5,       RISING);attachInterrupt(digitalPinToInterrupt(D6),       ISR_d6,       RISING);attachInterrupt(digitalPinToInterrupt(D9),       ISR_d9,       RISING);attachInterrupt(digitalPinToInterrupt(D10),      ISR_d10,      RISING);attachInterrupt(digitalPinToInterrupt(D11),      ISR_d11,      RISING);attachInterrupt(digitalPinToInterrupt(D12),      ISR_d12,      RISING);attachInterrupt(digitalPinToInterrupt(D13),      ISR_d13,      RISING);attachInterrupt(digitalPinToInterrupt(USER_BTN), ISR_user_btn, RISING);// Initialize the LPUART for logging  stlinkSerial.begin(115200);constsize_t stlinkSerial_timeout_ms =3000;for (constsize_t start_ms =millis(); !stlinkSerial && (millis() - start_ms) < stlinkSerial_timeout_ms;);// Provide a visual indication a catastrophic failure has occurredif (!stlinkSerial) {pinMode(LED_BUILTIN, OUTPUT);while (true) {digitalWrite(LED_BUILTIN, HIGH);delay(100);digitalWrite(LED_BUILTIN, LOW);delay(100);    };  }  stlinkSerial.println("Running Feather GPIO Digital Read Interrupt Test");}// the loop function runs over and over again forevervoidloop() {// Check for pin A0 interruptif (a0) {delay(100);    a0 =false;    stlinkSerial.println("A0: Interrupt");  }// Check for pin A1 interruptif (a1) {delay(100);    a1 =false;    stlinkSerial.println("A1: Interrupt");  }// Check for pin A2 interruptif (a2) {delay(100);    a2 =false;    stlinkSerial.println("A2: Interrupt");  }// Check for pin A3 interruptif (a3) {delay(100);    a3 =false;    stlinkSerial.println("A3: Interrupt");  }// Check for pin A4 interruptif (a4) {delay(100);    a4 =false;    stlinkSerial.println("A4: Interrupt");  }// Check for pin A5 interruptif (a5) {delay(100);    a5 =false;    stlinkSerial.println("A5: Interrupt");  }// Check for pin D5 interruptif (d5) {delay(100);    d5 =false;    stlinkSerial.println("D5: Interrupt");  }// Check for pin D6 interruptif (d6) {delay(100);    d6 =false;    stlinkSerial.println("D6: Interrupt");  }// Check for pin D9 interruptif (d9) {delay(100);    d9 =false;    stlinkSerial.println("D9: Interrupt");  }// Check for pin D10 interruptif (d10) {delay(100);    d10 =false;    stlinkSerial.println("D10: Interrupt");  }// Check for pin D11 interruptif (d11) {delay(100);    d11 =false;    stlinkSerial.println("D11: Interrupt");  }// Check for pin D12 interruptif (d12) {delay(100);    d12 =false;    stlinkSerial.println("D12: Interrupt");  }// Check for pin D13 interruptif (d13) {delay(100);    d13 =false;    stlinkSerial.println("D13: Interrupt");  }// Check for USER_BTN interruptif (user_btn) {delay(100);    user_btn =false;    stlinkSerial.println("USER_BTN: Interrupt");  }}