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cc2538: gpio: Add macros to use GPIO power-up interrupts

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The GPIO power-up interrupts have to be configured and enabled in order to be
able to wake-up the SoC from PM1+ upon a signal edge occurring on a GPIO input
pin.

This set of macros allows to:
 - configure the signal edge triggering a power-up interrupt,
 - enable and disable a power-up interrupt,
 - clear a power-up interrupt flag.

Signed-off-by: Benoît Thébaudeau <benoit.thebaudeau@advansee.com>
This commit is contained in:
Benoît Thébaudeau 2013-11-26 22:10:47 +01:00
parent ec5039b9eb
commit 44a5c76884
1 changed files with 45 additions and 0 deletions
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45
cpu/cc2538/dev/gpio.h
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@ -214,6 +214,51 @@ typedef void (* gpio_callback_t)(uint8_t port, uint8_t pin);
#define GPIO_SOFTWARE_CONTROL(PORT_BASE, PIN_MASK) \
do { REG((PORT_BASE) | GPIO_AFSEL) &= ~(PIN_MASK); } while(0)
/** \brief Set pins with PIN_MASK of port PORT to trigger a power-up interrupt
* on rising edge.
* \param PORT GPIO Port (not port base address)
* \param PIN_MASK Pin number mask. Pin 0: 0x01, Pin 1: 0x02 ... Pin 7: 0x80
*/
#define GPIO_POWER_UP_ON_RISING(PORT, PIN_MASK) \
do { REG(GPIO_PORT_TO_BASE(PORT) | GPIO_P_EDGE_CTRL) &= \
~((PIN_MASK) << ((PORT) << 3)); } while(0)
/** \brief Set pins with PIN_MASK of port PORT to trigger a power-up interrupt
* on falling edge.
* \param PORT GPIO Port (not port base address)
* \param PIN_MASK Pin number mask. Pin 0: 0x01, Pin 1: 0x02 ... Pin 7: 0x80
*/
#define GPIO_POWER_UP_ON_FALLING(PORT, PIN_MASK) \
do { REG(GPIO_PORT_TO_BASE(PORT) | GPIO_P_EDGE_CTRL) |= \
(PIN_MASK) << ((PORT) << 3); } while(0)
/** \brief Enable power-up interrupt triggering for pins with PIN_MASK of port
* PORT.
* \param PORT GPIO Port (not port base address)
* \param PIN_MASK Pin number mask. Pin 0: 0x01, Pin 1: 0x02 ... Pin 7: 0x80
*/
#define GPIO_ENABLE_POWER_UP_INTERRUPT(PORT, PIN_MASK) \
do { REG(GPIO_PORT_TO_BASE(PORT) | GPIO_PI_IEN) |= \
(PIN_MASK) << ((PORT) << 3); } while(0)
/** \brief Disable power-up interrupt triggering for pins with PIN_MASK of port
* PORT.
* \param PORT GPIO Port (not port base address)
* \param PIN_MASK Pin number mask. Pin 0: 0x01, Pin 1: 0x02 ... Pin 7: 0x80
*/
#define GPIO_DISABLE_POWER_UP_INTERRUPT(PORT, PIN_MASK) \
do { REG(GPIO_PORT_TO_BASE(PORT) | GPIO_PI_IEN) &= \
~((PIN_MASK) << ((PORT) << 3)); } while(0)
/** \brief Clear power-up interrupt triggering for pins with PIN_MASK of port
* PORT.
* \param PORT GPIO Port (not port base address)
* \param PIN_MASK Pin number mask. Pin 0: 0x01, Pin 1: 0x02 ... Pin 7: 0x80
*/
#define GPIO_CLEAR_POWER_UP_INTERRUPT(PORT, PIN_MASK) \
do { REG(GPIO_PORT_TO_BASE(PORT) | GPIO_IRQ_DETECT_ACK) = \
(PIN_MASK) << ((PORT) << 3); } while(0)
/**
* \brief Converts a pin number to a pin mask
* \param The pin number in the range [0..7]