diff options
Diffstat (limited to 'src/stm')
| -rw-r--r-- | src/stm/ao_exti.h | 1 | ||||
| -rw-r--r-- | src/stm/ao_exti_stm.c | 30 |
2 files changed, 17 insertions, 14 deletions
diff --git a/src/stm/ao_exti.h b/src/stm/ao_exti.h index 35b56b57..ebea224d 100644 --- a/src/stm/ao_exti.h +++ b/src/stm/ao_exti.h @@ -25,6 +25,7 @@ #define AO_EXTI_PRIORITY_LOW 16 #define AO_EXTI_PRIORITY_MED 0 #define AO_EXTI_PRIORITY_HIGH 32 +#define AO_EXTI_PIN_NOCONFIGURE 64 void ao_exti_setup(struct stm_gpio *gpio, uint8_t pin, uint8_t mode, void (*callback)()); diff --git a/src/stm/ao_exti_stm.c b/src/stm/ao_exti_stm.c index 1361d0d4..c1dcdf85 100644 --- a/src/stm/ao_exti_stm.c +++ b/src/stm/ao_exti_stm.c @@ -70,21 +70,23 @@ ao_exti_setup (struct stm_gpio *gpio, uint8_t pin, uint8_t mode, void (*callback /* configure gpio to interrupt routing */ stm_exticr_set(gpio, pin); - /* configure pin as input, setting selected pull-up/down mode */ - stm_moder_set(gpio, pin, STM_MODER_INPUT); - switch (mode & (AO_EXTI_MODE_PULL_UP|AO_EXTI_MODE_PULL_DOWN)) { - case 0: - default: - pupdr = STM_PUPDR_NONE; - break; - case AO_EXTI_MODE_PULL_UP: - pupdr = STM_PUPDR_PULL_UP; - break; - case AO_EXTI_MODE_PULL_DOWN: - pupdr = STM_PUPDR_PULL_DOWN; - break; + if (!(mode & AO_EXTI_PIN_NOCONFIGURE)) { + /* configure pin as input, setting selected pull-up/down mode */ + stm_moder_set(gpio, pin, STM_MODER_INPUT); + switch (mode & (AO_EXTI_MODE_PULL_UP|AO_EXTI_MODE_PULL_DOWN)) { + case 0: + default: + pupdr = STM_PUPDR_NONE; + break; + case AO_EXTI_MODE_PULL_UP: + pupdr = STM_PUPDR_PULL_UP; + break; + case AO_EXTI_MODE_PULL_DOWN: + pupdr = STM_PUPDR_PULL_DOWN; + break; + } + stm_pupdr_set(gpio, pin, pupdr); } - stm_pupdr_set(gpio, pin, pupdr); /* Set interrupt mask and rising/falling mode */ stm_exti.imr &= ~mask; |