diff options
Diffstat (limited to 'chip/stm32/gpio-f0-l.c')
| -rw-r--r-- | chip/stm32/gpio-f0-l.c | 51 |
1 files changed, 51 insertions, 0 deletions
diff --git a/chip/stm32/gpio-f0-l.c b/chip/stm32/gpio-f0-l.c index df45c15aa5..4c026cc767 100644 --- a/chip/stm32/gpio-f0-l.c +++ b/chip/stm32/gpio-f0-l.c @@ -24,6 +24,53 @@ static uint32_t expand_to_2bit_mask(uint32_t mask) return mask_out; } +int gpio_get_flags_by_mask(uint32_t port, uint32_t mask) +{ + uint32_t flags = 0; + uint32_t val = 0; + const uint32_t mask2 = expand_to_2bit_mask(mask); + + /* Only one bit must be set. */ + if ((mask != (mask & -mask)) || (mask == 0)) + return 0; + + /* Check output type. */ + val = STM32_GPIO_PUPDR(port) & mask2; + if (val == (0x55555555 & mask2)) + flags |= GPIO_PULL_UP; + if (val == (0xaaaaaaaa & mask2)) + flags |= GPIO_PULL_DOWN; + + if (STM32_GPIO_OTYPER(port) & mask) + flags |= GPIO_OPEN_DRAIN; + + /* Check mode. */ + val = STM32_GPIO_MODER(port) & mask2; + if (val == (0x55555555 & mask2)) + flags |= GPIO_OUTPUT; + if (val == (0xFFFFFFFF & mask2)) + flags |= GPIO_ANALOG; + if (val == (0x0 & mask2)) + flags |= GPIO_INPUT; + if (val == (0xaaaaaaaa & mask2)) + flags |= GPIO_ALTERNATE; + + if (flags & GPIO_OUTPUT) { + if (STM32_GPIO_ODR(port) & mask) + flags |= GPIO_HIGH; + else + flags |= GPIO_LOW; + } + + + if (STM32_EXTI_RTSR & mask) + flags |= GPIO_INT_F_RISING; + if (STM32_EXTI_RTSR & mask) + flags |= GPIO_INT_F_RISING; + + return flags; +} + void gpio_set_flags_by_mask(uint32_t port, uint32_t mask, uint32_t flags) { /* Bitmask for registers with 2 bits per GPIO pin */ @@ -70,6 +117,10 @@ void gpio_set_flags_by_mask(uint32_t port, uint32_t mask, uint32_t flags) } else if (flags & GPIO_INPUT) { /* Input, MODE=00 */ STM32_GPIO_MODER(port) = val; + } else if (flags & GPIO_ALTERNATE) { + /* Alternate, MODE=10 */ + val |= 0xaaaaaaaa & mask2; + STM32_GPIO_MODER(port) = val; } /* Set up interrupts if necessary */ |