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stm32: gpio_toggle: ensure correct state of non-toggled pins.

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Michael Spieler 2014-07-16 12:58:36 +02:00 committed by Karl Palsson
parent 0d5dac515a
commit 50dd1c5725
1 changed files with 4 additions and 2 deletions
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6
lib/stm32/common/gpio_common_all.c
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@ -77,7 +77,8 @@ uint16_t gpio_get(uint32_t gpioport, uint16_t gpios)
/*---------------------------------------------------------------------------*/
/** @brief Toggle a Group of Pins
Toggle one or more pins of the given GPIO port. This is not an atomic operation.
Toggle one or more pins of the given GPIO port. The toggling is not atomic, but
the non-toggled pins are not affected.
@param[in] gpioport Unsigned int32. Port identifier @ref gpio_port_id
@param[in] gpios Unsigned int16. Pin identifiers @ref gpio_pin_id
@ -86,7 +87,8 @@ Toggle one or more pins of the given GPIO port. This is not an atomic operation.
*/
void gpio_toggle(uint32_t gpioport, uint16_t gpios)
{
GPIO_ODR(gpioport) ^= gpios;
uint32_t port = GPIO_ODR(gpioport);
GPIO_BSRR(gpioport) = ((port & gpios) << 16) | (~port & gpios);
}
/*---------------------------------------------------------------------------*/