233 lines
6 KiB
C
233 lines
6 KiB
C
/*
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* Copyright (c) 2010, Swedish Institute of Computer Science.
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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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* This file is part of the Contiki operating system.
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*
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*/
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/**
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* \file
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* Device drivers for light ziglet sensor in Zolertia Z1.
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* \author
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* Antonio Lignan, Zolertia <alinan@zolertia.com>
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* Marcus Lundén, SICS <mlunden@sics.se>
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*/
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#include <stdio.h>
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#include "contiki.h"
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#include "i2cmaster.h"
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#include "light-ziglet.h"
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#if 0
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#define PRINTFDEBUG(...) printf(__VA_ARGS__)
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#else
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#define PRINTFDEBUG(...)
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#endif
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/* Bitmasks and bit flag variable for keeping track of tmp102 status. */
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enum TSL2563_STATUSTYPES
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{
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/* must be a bit and not more, not using 0x00. */
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INITED = 0x01,
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RUNNING = 0x02,
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STOPPED = 0x04,
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};
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static enum TSL2563_STATUSTYPES _TSL2563_STATUS = 0x00;
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uint16_t
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calculateLux(uint16_t *buffer)
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{
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uint32_t ch0, ch1 = 0;
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uint32_t aux = (1<<14);
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uint32_t ratio, lratio, tmp = 0;
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ch0 = (buffer[0]*aux) >> 10;
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ch1 = (buffer[1]*aux) >> 10;
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PRINTFDEBUG("B0 %u, B1 %u\n", buffer[0], buffer[1]);
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PRINTFDEBUG("ch0 %lu, ch1 %lu\n", ch0, ch1);
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ratio = (ch1 << 10);
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ratio = ratio/ch0;
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lratio = (ratio+1) >> 1;
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PRINTFDEBUG("ratio %lu, lratio %lu\n", ratio, lratio);
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if ((lratio >= 0) && (lratio <= K1T))
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tmp = (ch0*B1T) - (ch1*M1T);
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else if (lratio <= K2T)
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tmp = (ch0*B2T) - (ch1*M2T);
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else if (lratio <= K3T)
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tmp = (ch0*B3T) - (ch1*M3T);
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else if (lratio <= K4T)
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tmp = (ch0*B4T) - (ch1*M4T);
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else if (lratio <= K5T)
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tmp = (ch0*B5T) - (ch1*M5T);
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else if (lratio <= K6T)
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tmp = (ch0*B6T) - (ch1*M6T);
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else if (lratio <= K7T)
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tmp = (ch0*B7T) - (ch1*M7T);
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else if (lratio > K8T)
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tmp = (ch0*B8T) - (ch1*M8T);
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if (tmp < 0) tmp = 0;
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tmp += (1<<13);
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PRINTFDEBUG("tmp %lu\n", tmp);
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return (tmp >> 14);
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}
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/*---------------------------------------------------------------------------*/
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/* Init the light ziglet sensor: ports, pins, registers, interrupts (none enabled), I2C,
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default threshold values etc. */
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void
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light_ziglet_init (void)
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{
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if (!(_TSL2563_STATUS & INITED))
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{
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PRINTFDEBUG ("light ziglet init\n");
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_TSL2563_STATUS |= INITED;
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/* Set up ports and pins for I2C communication */
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i2c_enable ();
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return;
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}
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}
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/*---------------------------------------------------------------------------*/
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/* Write to a 16-bit register.
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args:
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reg register to write to
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val value to write
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*/
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void
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tsl2563_write_reg (uint8_t reg, uint16_t val)
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{
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uint8_t tx_buf[] = { reg, 0x00, 0x00 };
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tx_buf[1] = (uint8_t) (val >> 8);
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tx_buf[2] = (uint8_t) (val & 0x00FF);
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i2c_transmitinit (TSL2563_ADDR);
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while (i2c_busy ());
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PRINTFDEBUG ("I2C Ready to TX\n");
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i2c_transmit_n (3, tx_buf);
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while (i2c_busy ());
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PRINTFDEBUG ("WRITE_REG 0x%04X @ reg 0x%02X\n", val, reg);
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}
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/*---------------------------------------------------------------------------*/
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/* Read register.
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args:
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reg what register to read
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returns the value of the read register type uint16_t
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*/
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uint16_t
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tsl2563_read_reg (uint8_t reg)
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{
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uint16_t readBuf[] = {0x00, 0x00};
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uint8_t buf[] = { 0x00, 0x00, 0x00, 0x00};
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uint16_t retVal = 0;
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uint8_t rtx = reg;
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// Transmit the register to read
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i2c_transmitinit (TSL2563_ADDR);
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while (i2c_busy ());
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i2c_transmit_n (1, &rtx);
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while (i2c_busy ());
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// Receive the data
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i2c_receiveinit (TSL2563_ADDR);
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while (i2c_busy ());
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i2c_receive_n (4, &buf[0]);
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while (i2c_busy ());
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PRINTFDEBUG("\nb0 %u, b1 %u, b2 %u, b3 %u\n", buf[0], buf[1], buf[2], buf[3]);
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readBuf[0] = (buf[1] << 8 | (buf[0]));
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readBuf[1] = (buf[3] << 8 | (buf[2]));
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/* XXX Quick hack, was receiving dups bytes */
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if(readBuf[0] == readBuf[1]){
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tsl2563_read_reg(TSL2563_READ);
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return;
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} else {
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retVal = calculateLux(&readBuf);
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return retVal;
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}
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}
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uint16_t
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light_ziglet_on(void)
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{
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uint16_t data;
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uint8_t regon[] = { 0x00, TSL2563_PWRN };
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// Turn on the sensor
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i2c_transmitinit (TSL2563_ADDR);
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while (i2c_busy ());
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i2c_transmit_n (2, ®on);
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while (i2c_busy ());
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data = (uint16_t) tsl2563_read_reg (TSL2563_READ);
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return data;
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}
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void
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light_ziglet_off(void)
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{
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uint8_t regoff = 0x00;
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// Turn off the sensor
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i2c_transmitinit (TSL2563_ADDR);
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while (i2c_busy ());
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i2c_transmit_n (1, ®off);
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while (i2c_busy ());
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return;
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}
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/*---------------------------------------------------------------------------*/
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/* Read light ziglet sensor
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*/
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uint16_t
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light_ziglet_read(void)
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{
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uint16_t lux = 0;
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lux = light_ziglet_on();
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light_ziglet_off();
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return lux;
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}
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