Merge remote-tracking branch 'mjb/master'

[fw/altos] / src / stm / stm32l.h

diff --git a/src/stm/stm32l.h b/src/stm/stm32l.h
index 3a498a0a06043febab4b3bca22e38e5dc041e019..25f5af073d76659b3ec7cba65252d6f19b8161fc 100644 (file)
--- a/src/stm/stm32l.h
+++ b/src/stm/stm32l.h
@@ -905,6 +905,9 @@ stm_exticr_set(struct stm_gpio *gpio, int pin) {
        uint8_t shift = (pin & 3) << 2;
        uint8_t val = 0;
 
+       /* Enable SYSCFG */
+       stm_rcc.apb2enr |= (1 << STM_RCC_APB2ENR_SYSCFGEN);
+
        if (gpio == &stm_gpioa)
                val = STM_SYSCFG_EXTICR_PA;
        else if (gpio == &stm_gpiob)