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cc2538: gpio: Add macro to get pin direction

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Signed-off-by: Benoît Thébaudeau <benoit@wsystem.com>
This commit is contained in:
Benoît Thébaudeau 2016-11-17 17:44:18 +01:00 committed by Benoît Thébaudeau
parent faf22609f4
commit 0e5b18635b
1 changed files with 14 additions and 0 deletions
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14
cpu/cc2538/dev/gpio.h
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@ -100,6 +100,20 @@ typedef void (* gpio_callback_t)(uint8_t port, uint8_t pin);
#define GPIO_SET_OUTPUT(PORT_BASE, PIN_MASK) \
do { REG((PORT_BASE) + GPIO_DIR) |= (PIN_MASK); } while(0)
/** \brief Return whether pins with PIN_MASK of port with PORT_BASE are set to
* output.
* \param PORT_BASE GPIO Port register offset
* \param PIN_MASK Pin number mask. Pin 0: 0x01, Pin 1: 0x02 ... Pin 7: 0x80
* \return The direction of the pins specified by PIN_MASK
*
* This macro will \e not return 0 or 1. Instead, it will return the directions
* of the pins specified by PIN_MASK ORed together. Thus, if 0xC3
* (0x80 | 0x40 | 0x02 | 0x01) is passed as the PIN_MASK and pins 7 and 0 are
* set to output, the macro will return 0x81.
*/
#define GPIO_IS_OUTPUT(PORT_BASE, PIN_MASK) \
(REG((PORT_BASE) + GPIO_DIR) & (PIN_MASK))
/** \brief Set pins with PIN_MASK of port with PORT_BASE high.
* \param PORT_BASE GPIO Port register offset
* \param PIN_MASK Pin number mask. Pin 0: 0x01, Pin 1: 0x02 ... Pin 7: 0x80