cpu/lm4f120: GPIO: clear stale interrupt

2020-08-13 00:37:22 +02:00 · 2020-08-13 00:37:22 +02:00 · 2509c206ee
commit 2509c206ee
parent add10b5fab
1 changed files with 4 additions and 0 deletions
--- a/cpu/lm4f120/periph/gpio.c
+++ b/cpu/lm4f120/periph/gpio.c
@ -262,6 +262,10 @@ void gpio_irq_enable(gpio_t pin)
    const uint8_t pin_num = _pin_num(pin);
    const uint8_t pin_bit = 1<<pin_num;

+    /* clear stale interrupt */
+    ROM_GPIOPinIntClear(port_addr, pin_bit);
+
+    /* enable interrupt */
    HWREG(im_reg_addr) |= pin_bit;
 }