diff options
| -rw-r--r-- | chip/stm32/gpio-stm32f100.c | 7 | ||||
| -rw-r--r-- | include/gpio.h | 12 |
2 files changed, 19 insertions, 0 deletions
diff --git a/chip/stm32/gpio-stm32f100.c b/chip/stm32/gpio-stm32f100.c index e1a28b8d7a..50c732bc27 100644 --- a/chip/stm32/gpio-stm32f100.c +++ b/chip/stm32/gpio-stm32f100.c @@ -174,6 +174,13 @@ void gpio_set_alternate_function(int port, int mask, int func) } +uint16_t *gpio_get_level_reg(enum gpio_signal signal, uint32_t *mask) +{ + *mask = gpio_list[signal].mask; + return (uint16_t *)&STM32_GPIO_IDR_OFF(gpio_list[signal].port); +} + + int gpio_get_level(enum gpio_signal signal) { return !!(STM32_GPIO_IDR_OFF(gpio_list[signal].port) & diff --git a/include/gpio.h b/include/gpio.h index b70e40f9a1..e03acfb0c9 100644 --- a/include/gpio.h +++ b/include/gpio.h @@ -66,6 +66,18 @@ int gpio_pre_init(void); int gpio_get_level(enum gpio_signal signal); /** + * Get faster access to a GPIO level + * + * Use this function to find out the register address and mask for a GPIO + * value. Then you can just check that instead of calling gpio_get_level(). + * + * @param signal Signal to return details for + * @param mask Mask value to use + * @return pointer to register to read to get GPIO value + */ +uint16_t *gpio_get_level_reg(enum gpio_signal signal, uint32_t *mask); + +/** * Returns the name of a given GPIO signal. * * @param signal Signal to return. |