40f49948e6
This commit adds cpu, platform and example files, providing support for running Contiki on TI's cc2538 DK
147 lines
4.4 KiB
C
147 lines
4.4 KiB
C
/*
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* Copyright (c) 2012, Texas Instruments Incorporated - http://www.ti.com/
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* 3. Neither the name of the copyright holder nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
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* OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/**
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* \addtogroup cc2538-gpio
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* @{
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*
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* \file
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* Implementation of the cc2538 GPIO controller
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*/
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#include "contiki.h"
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#include "sys/energest.h"
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#include "dev/leds.h"
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#include "dev/gpio.h"
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#include "dev/nvic.h"
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#include "reg.h"
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#include "lpm.h"
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#include <string.h>
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/**
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* \brief Pointer to a function to be called when a GPIO interrupt is detected.
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* Callbacks for Port A, Pins[0:7] are stored in positions [0:7] of this
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* buffer, Port B callbacks in [8:15] and so on
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*/
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static gpio_callback_t gpio_callbacks[32];
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/*---------------------------------------------------------------------------*/
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void
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gpio_register_callback(gpio_callback_t f, uint8_t port, uint8_t pin)
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{
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gpio_callbacks[(port << 3) + pin] = f;
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}
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/*---------------------------------------------------------------------------*/
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/** \brief Run through all registered GPIO callbacks and invoke those
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* associated with the \a port and the pins specified by \a mask
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* \param mask Search callbacks associated with pins specified by this mask
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* \param port Search callbacks associated with this port. Here, port is
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* specified as a number between 0 and 3. Port A: 0, Port B: 1 etc */
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void
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notify(uint8_t mask, uint8_t port)
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{
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uint8_t i;
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gpio_callback_t *f = &gpio_callbacks[port << 3];
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for(i = 0; i < 8; i++) {
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if(mask & (1 << i)) {
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if((*f) != NULL) {
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(*f)(port, i);
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}
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}
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f++;
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}
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}
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/*---------------------------------------------------------------------------*/
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/** \brief Interrupt service routine for Port A */
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void
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gpio_port_a_isr()
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{
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ENERGEST_ON(ENERGEST_TYPE_IRQ);
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lpm_exit();
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notify(REG(GPIO_A_BASE | GPIO_MIS), GPIO_A_NUM);
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REG(GPIO_A_BASE | GPIO_IC) = 0xFF;
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ENERGEST_OFF(ENERGEST_TYPE_IRQ);
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}
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/*---------------------------------------------------------------------------*/
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/** \brief Interrupt service routine for Port B */
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void
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gpio_port_b_isr()
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{
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ENERGEST_ON(ENERGEST_TYPE_IRQ);
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lpm_exit();
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notify(REG(GPIO_B_BASE | GPIO_MIS), GPIO_B_NUM);
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REG(GPIO_B_BASE | GPIO_IC) = 0xFF;
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ENERGEST_OFF(ENERGEST_TYPE_IRQ);
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}
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/*---------------------------------------------------------------------------*/
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/** \brief Interrupt service routine for Port C */
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void
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gpio_port_c_isr()
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{
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ENERGEST_ON(ENERGEST_TYPE_IRQ);
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lpm_exit();
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notify(REG(GPIO_C_BASE | GPIO_MIS), GPIO_C_NUM);
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REG(GPIO_C_BASE | GPIO_IC) = 0xFF;
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ENERGEST_OFF(ENERGEST_TYPE_IRQ);
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}
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/*---------------------------------------------------------------------------*/
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/** \brief Interrupt service routine for Port D */
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void
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gpio_port_d_isr()
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{
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ENERGEST_ON(ENERGEST_TYPE_IRQ);
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lpm_exit();
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notify(REG(GPIO_D_BASE | GPIO_MIS), GPIO_D_NUM);
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REG(GPIO_D_BASE | GPIO_IC) = 0xFF;
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ENERGEST_OFF(ENERGEST_TYPE_IRQ);
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}
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/*---------------------------------------------------------------------------*/
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void
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gpio_init()
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{
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memset(gpio_callbacks, 0, sizeof(gpio_callbacks));
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}
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/** @} */
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