1e67ab3941
Introduce new useful GPIO macros to: - get the raw interrupt status of a port, - get the masked interrupt status of a port, - get the power-up interrupt status of a port. These macros are cleaner and less error-prone than raw register access code copied all over the place. Signed-off-by: Benoît Thébaudeau <benoit.thebaudeau.dev@gmail.com>
121 lines
3.9 KiB
C
121 lines
3.9 KiB
C
/*
|
|
* Copyright (c) 2012, Texas Instruments Incorporated - http://www.ti.com/
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
*
|
|
* 3. Neither the name of the copyright holder nor the names of its
|
|
* contributors may be used to endorse or promote products derived
|
|
* from this software without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
|
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
|
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
|
|
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
|
|
* COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
|
|
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
|
|
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
|
|
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
|
|
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
|
|
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
|
|
* OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
*/
|
|
/**
|
|
* \addtogroup cc2538-gpio
|
|
* @{
|
|
*
|
|
* \file
|
|
* Implementation of the cc2538 GPIO controller
|
|
*/
|
|
#include "contiki.h"
|
|
#include "sys/energest.h"
|
|
#include "dev/leds.h"
|
|
#include "dev/gpio.h"
|
|
#include "dev/nvic.h"
|
|
#include "reg.h"
|
|
#include "lpm.h"
|
|
|
|
#include <string.h>
|
|
|
|
/**
|
|
* \brief Pointer to a function to be called when a GPIO interrupt is detected.
|
|
* Callbacks for Port A, Pins[0:7] are stored in positions [0:7] of this
|
|
* buffer, Port B callbacks in [8:15] and so on
|
|
*/
|
|
static gpio_callback_t gpio_callbacks[32];
|
|
/*---------------------------------------------------------------------------*/
|
|
void
|
|
gpio_register_callback(gpio_callback_t f, uint8_t port, uint8_t pin)
|
|
{
|
|
gpio_callbacks[(port << 3) + pin] = f;
|
|
}
|
|
/*---------------------------------------------------------------------------*/
|
|
/** \brief Run through all registered GPIO callbacks and invoke those
|
|
* associated with the \a port and the pins specified by \a mask
|
|
* \param mask Search callbacks associated with pins specified by this mask
|
|
* \param port Search callbacks associated with this port. Here, port is
|
|
* specified as a number between 0 and 3. Port A: 0, Port B: 1 etc */
|
|
void
|
|
notify(uint8_t mask, uint8_t port)
|
|
{
|
|
uint8_t i;
|
|
gpio_callback_t *f = &gpio_callbacks[port << 3];
|
|
|
|
for(i = 0; i < 8; i++) {
|
|
if(mask & (1 << i)) {
|
|
if((*f) != NULL) {
|
|
(*f)(port, i);
|
|
}
|
|
}
|
|
f++;
|
|
}
|
|
}
|
|
/*---------------------------------------------------------------------------*/
|
|
/** \brief Interrupt service routine for Port \a port
|
|
* \param port Number between 0 and 3. Port A: 0, Port B: 1, etc.
|
|
*/
|
|
static void
|
|
gpio_port_isr(uint8_t port)
|
|
{
|
|
uint32_t base;
|
|
|
|
lpm_exit();
|
|
|
|
ENERGEST_ON(ENERGEST_TYPE_IRQ);
|
|
|
|
base = GPIO_PORT_TO_BASE(port);
|
|
|
|
notify(GPIO_GET_MASKED_INT_STATUS(base), port);
|
|
|
|
GPIO_CLEAR_INTERRUPT(base, 0xFF);
|
|
GPIO_CLEAR_POWER_UP_INTERRUPT(port, 0xFF);
|
|
|
|
ENERGEST_OFF(ENERGEST_TYPE_IRQ);
|
|
}
|
|
/*---------------------------------------------------------------------------*/
|
|
#define GPIO_PORT_ISR(lowercase_port, uppercase_port) \
|
|
void \
|
|
gpio_port_##lowercase_port##_isr(void) \
|
|
{ \
|
|
gpio_port_isr(GPIO_##uppercase_port##_NUM); \
|
|
}
|
|
GPIO_PORT_ISR(a, A)
|
|
GPIO_PORT_ISR(b, B)
|
|
GPIO_PORT_ISR(c, C)
|
|
GPIO_PORT_ISR(d, D)
|
|
/*---------------------------------------------------------------------------*/
|
|
void
|
|
gpio_init()
|
|
{
|
|
memset(gpio_callbacks, 0, sizeof(gpio_callbacks));
|
|
}
|
|
/** @} */
|