-/*
- * Copyright (c) 2009 Communication Group and Eislab at
- * Lulea University of Technology
- *
- * Contact: Laurynas Riliskis, LTU
- * Mail: laurynas.riliskis@ltu.se
- * All rights reserved.
- *
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * - Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * - 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.
- * - Neither the name of Communication Group at Lulea University of Technology
- * 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 STANFORD
- * UNIVERSITY OR ITS 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.
- */
-
-/**
- * Implementation of the RV-8564-C2 real time clock.
- *
- * @author Henrik Makitaavola <henrik.makitaavola@gmail.com>
- */
-
-#include "rv8564.h"
-#include "I2C.h"
-module RV8564P
-{
- provides interface RV8564 as RTC;
- // TODO(henrik) Exactly how is the RTC connected to mulle, what is the functionallity of GeneralIO?
- // Maybe there is only a init needed because the chip is always on?
- uses interface GeneralIO as CLKOE;
- uses interface GeneralIO as CLKOUT;
- uses interface GeneralIO;
- uses interface GpioInterrupt;
- uses interface I2CPacket<TI2CBasicAddr> as I2C;
- uses interface Resource as I2CResource;
-}
-implementation
-{
-
- enum
- {
- OFF,
- IDLE,
- READING,
- WRITING
- };
- norace uint8_t state = OFF;
- norace uint8_t read_register;
- uint8_t read_register_value;
- uint8_t write_buffer[2];
-
- command error_t RTC.on()
- {
- if (state != OFF)
- {
- return SUCCESS;
- }
- state = IDLE;
- return SUCCESS;
- }
-
- command error_t RTC.off()
- {
- if (state == OFF)
- {
- return SUCCESS;
- }
- else if (state != IDLE)
- {
- return FAIL;
- }
- call CLKOE.clr();
- call CLKOUT.clr();
- return SUCCESS;
- }
-
- command bool RTC.isOn()
- {
- return ((state != OFF) ? true : false);
- }
-
- command void RTC.enableCLKOUT()
- {
- call CLKOUT.makeInput();
- call CLKOUT.clr();
- call CLKOE.makeOutput();
- call CLKOE.set();
- }
- command void RTC.enableInterrupt()
- {
- call GpioInterrupt.enableFallingEdge();
- }
-
- command void RTC.disableInterrupt()
- {
- call GpioInterrupt.disable();
- }
-
- command error_t RTC.readRegister(uint8_t reg)
- {
- uint8_t val;
- if (state != IDLE)
- {
- return FAIL;
- }
- state = READING;
- read_register = reg;
- call I2CResource.request();
- return SUCCESS;
- }
-
- command error_t RTC.writeRegister(uint8_t reg, uint8_t value)
- {
- if (state != IDLE)
- {
- return FAIL;
- }
- state = WRITING;
- atomic write_buffer[0] = reg;
- atomic write_buffer[1] = value;
- call I2CResource.request();
- return SUCCESS;
- }
-
- event void I2CResource.granted()
- {
- atomic {
- if (state == READING)
- {
- call I2C.write(I2C_START | I2C_STOP, RV8564_ADDR, 1, &read_register);
- }
- else if (state == WRITING)
- {
- call I2C.write(I2C_START | I2C_STOP, RV8564_ADDR, 2, write_buffer);
- }
- }
- }
-
- async event void GpioInterrupt.fired()
- {
- signal RTC.fired();
- }
-
- async event void I2C.readDone(error_t error, uint16_t addr, uint8_t length, uint8_t* data)
- {
- atomic
- {
- if (state == READING && data == &read_register_value)
- {
- state = IDLE;
- call I2CResource.release();
- signal RTC.readRegisterDone(read_register_value, read_register);
- }
- }
- }
-
- async event void I2C.writeDone(error_t error, uint16_t addr, uint8_t length, uint8_t* data)
- {
- if (state == READING)
- {
- call I2C.read(I2C_START | I2C_STOP, RV8564_ADDR, 1, &read_register_value);
- }
- else if (state == WRITING)
- {
- state = IDLE;
- call I2CResource.release();
- signal RTC.writeRegisterDone(write_buffer[0]);
- }
- }
-
- default async event void RTC.readRegisterDone(uint8_t val, uint8_t reg) {}
- default async event void RTC.writeRegisterDone(uint8_t reg) {}
- default async event void RTC.fired() { }
-}