mirror of
https://github.com/oliverschmidt/contiki.git
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221 lines
6.4 KiB
C
221 lines
6.4 KiB
C
/*
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* Copyright (c) 2015, Zolertia - http://www.zolertia.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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* 3. Neither the name of the Institute nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR 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, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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*/
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/*---------------------------------------------------------------------------*/
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/**
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* \addtogroup remote-power-mgmt
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* @{
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*
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* RE-Mote power management and shutdown mode
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* @{
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*
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* \author
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* Aitor Mejias <amejias@zolertia.com>
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* Antonio Lignan <alinan@zolertia.com>
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*/
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/* -------------------------------------------------------------------------- */
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#include <stdio.h>
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#include <stdint.h>
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#include "contiki.h"
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#include "dev/gpio.h"
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#include "sys/rtimer.h"
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#include "power-mgmt.h"
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/* -------------------------------------------------------------------------- */
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#define DEBUG 0
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#if DEBUG
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#define PRINTF(...) printf(__VA_ARGS__)
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#else
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#define PRINTF(...)
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#endif
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/* -------------------------------------------------------------------------- */
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#define PM_CMD_LINE_SET GPIO_SET_PIN(PM_CMD_PORT_BASE, PM_CMD_PIN_MASK)
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#define PM_CMD_LINE_CLR GPIO_CLR_PIN(PM_CMD_PORT_BASE, PM_CMD_PIN_MASK)
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#define PM_CMD_LINE_READ GPIO_READ_PIN(PM_CMD_PORT_BASE, PM_CMD_PIN_MASK)
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#define PM_CMD_AS_OUTPUT GPIO_SET_OUTPUT(PM_CMD_PORT_BASE, PM_CMD_PIN_MASK)
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#define PM_CMD_AS_INPUT GPIO_SET_INPUT(PM_CMD_PORT_BASE, PM_CMD_PIN_MASK)
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/* -------------------------------------------------------------------------- */
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#define PM_NUMBITS(X) (1 << ((X) - 1))
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/* -------------------------------------------------------------------------- */
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static uint8_t initialized = 0;
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static uint8_t getData = 0;
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/* -------------------------------------------------------------------------- */
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static int8_t
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pm_get_ack(void)
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{
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uint16_t error = PM_ERROR;
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PM_CMD_AS_INPUT;
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clock_delay_usec(PM_3_MILISECOND);
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if(PM_CMD_LINE_READ) {
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error = PM_SUCCESS;
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}
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clock_delay_usec(PM_10_MILISECOND);
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PM_CMD_AS_OUTPUT;
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return error;
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}
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/* -------------------------------------------------------------------------- */
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static int8_t
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pm_send_cmd(uint8_t cmd)
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{
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uint8_t i;
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PRINTF("PM: cmd %u\n", cmd);
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/* Enter command mode */
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PM_CMD_LINE_SET;
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clock_delay_usec(PM_1_MILISECOND);
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PM_CMD_LINE_CLR;
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/* Send command */
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for (i = PM_MAX_BITS; i > 0; i--) {
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clock_delay_usec(PM_1_MILISECOND);
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if (cmd & PM_NUMBITS(i)) {
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PM_CMD_LINE_SET;
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}
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else PM_CMD_LINE_CLR;
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}
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clock_delay_usec(PM_1_MILISECOND);
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PM_CMD_LINE_CLR;
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/* Receive command reply if any */
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if((cmd == PM_CMD_GET_STATE) || (cmd == PM_CMD_GET_FW_VERSION)) {
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PM_CMD_AS_INPUT;
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clock_delay_usec(PM_2_2_MILISECOND);
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for (i = PM_MAX_BITS; i > 0; i--) {
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clock_delay_usec(PM_1_MILISECOND);
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PM_CMD_LINE_READ ? (getData |= PM_NUMBITS(i)) : (getData &= ~PM_NUMBITS(i));
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}
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PRINTF("PM: getData = 0x%02X\n", getData);
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clock_delay_usec(PM_2_2_MILISECOND);
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PM_CMD_AS_OUTPUT;
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PM_CMD_LINE_CLR;
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clock_delay_usec(PM_2_2_MILISECOND);
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return PM_SUCCESS;
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}
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/* Default case */
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clock_delay_usec(PM_1_MILISECOND);
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return pm_get_ack();
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}
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/* -------------------------------------------------------------------------- */
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int8_t
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pm_init(void)
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{
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/* Configure and clear immediately */
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GPIO_SOFTWARE_CONTROL(PM_DONE_PORT_BASE, PM_DONE_PIN_MASK);
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GPIO_SET_OUTPUT(PM_DONE_PORT_BASE, PM_DONE_PIN_MASK);
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GPIO_CLR_PIN(PM_DONE_PORT_BASE, PM_DONE_PIN_MASK);
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/* Set as output/low to set IDLE state */
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GPIO_SOFTWARE_CONTROL(PM_CMD_PORT_BASE, PM_CMD_PIN_MASK);
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PM_CMD_AS_OUTPUT;
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PM_CMD_LINE_CLR;
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/* Ensure the battery charger is on, so we don't lock ourselves out and left
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* stranded in a state the CC2538 and components are kept off
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*/
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if(pm_send_cmd(PM_CMD_PWR_ON) == PM_SUCCESS) {
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initialized = 1;
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PRINTF("PM: Initialized\n");
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return PM_SUCCESS;
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}
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PRINTF("PM: Failed to initialize\n");
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return PM_ERROR;
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}
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/* -------------------------------------------------------------------------- */
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int8_t
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pm_enable_timer(void)
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{
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if(!initialized) {
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return PM_ERROR;
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}
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if(pm_send_cmd(PM_CMD_DTIMER_ON) == PM_SUCCESS) {
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return PM_SUCCESS;
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}
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return PM_ERROR;
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}
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/* -------------------------------------------------------------------------- */
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int8_t
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pm_disable_timer(void)
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{
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if(!initialized) {
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return PM_ERROR;
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}
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if(pm_send_cmd(PM_CMD_DTIMER_OFF) == PM_SUCCESS) {
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return PM_SUCCESS;
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}
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return PM_ERROR;
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}
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/* -------------------------------------------------------------------------- */
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int8_t
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pm_get_state(uint8_t *state)
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{
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if(!initialized) {
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return PM_ERROR;
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}
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if(pm_send_cmd(PM_CMD_GET_STATE) == PM_SUCCESS) {
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*state = getData;
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PRINTF("PM: state %u\n", getData);
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return PM_SUCCESS;
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}
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return PM_ERROR;
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}
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/* -------------------------------------------------------------------------- */
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int8_t
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pm_get_firmware_version(uint8_t *state)
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{
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if(!initialized) {
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return PM_ERROR;
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}
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if (pm_send_cmd(PM_CMD_GET_FW_VERSION) == PM_SUCCESS) {
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*state = getData;
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printf("PM: FW Version %u\n", getData);
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return PM_SUCCESS;
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}
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return PM_ERROR;
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}
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/*---------------------------------------------------------------------------*/
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/**
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* @}
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* @}
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*/
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