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Zolertia's light sensor ziglet

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This commit is contained in:
Antonio Lignan 2012-05-11 13:38:14 +02:00
parent 65719adc93
commit 6df9ffb731
5 changed files with 445 additions and 2 deletions
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platform/z1/dev/light-ziglet.c Normal file
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/*
* Copyright (c) 2010, Swedish Institute of Computer Science.
* 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 Institute 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 INSTITUTE 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 INSTITUTE 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.
*
* This file is part of the Contiki operating system.
*
*/
/**
* \file
* Device drivers for light ziglet sensor in Zolertia Z1.
* \author
* Antonio Lignan, Zolertia <alinan@zolertia.com>
* Marcus Lundén, SICS <mlunden@sics.se>
*/
#include <stdio.h>
#include "contiki.h"
#include "i2cmaster.h"
#include "light-ziglet.h"
#if 0
#define PRINTFDEBUG(...) printf(__VA_ARGS__)
#else
#define PRINTFDEBUG(...)
#endif
/* Bitmasks and bit flag variable for keeping track of tmp102 status. */
enum TSL2563_STATUSTYPES
{
/* must be a bit and not more, not using 0x00. */
INITED = 0x01,
RUNNING = 0x02,
STOPPED = 0x04,
};
static enum TSL2563_STATUSTYPES _TSL2563_STATUS = 0x00;
uint16_t
calculateLux(uint16_t *buffer)
{
uint32_t ch0, ch1 = 0;
uint32_t aux = (1<<14);
uint32_t ratio, lratio, tmp = 0;
ch0 = (buffer[0]*aux) >> 10;
ch1 = (buffer[1]*aux) >> 10;
PRINTFDEBUG("B0 %u, B1 %u\n", buffer[0], buffer[1]);
PRINTFDEBUG("ch0 %lu, ch1 %lu\n", ch0, ch1);
ratio = (ch1 << 10);
ratio = ratio/ch0;
lratio = (ratio+1) >> 1;
PRINTFDEBUG("ratio %lu, lratio %lu\n", ratio, lratio);
if ((lratio >= 0) && (lratio <= K1T))
tmp = (ch0*B1T) - (ch1*M1T);
else if (lratio <= K2T)
tmp = (ch0*B2T) - (ch1*M2T);
else if (lratio <= K3T)
tmp = (ch0*B3T) - (ch1*M3T);
else if (lratio <= K4T)
tmp = (ch0*B4T) - (ch1*M4T);
else if (lratio <= K5T)
tmp = (ch0*B5T) - (ch1*M5T);
else if (lratio <= K6T)
tmp = (ch0*B6T) - (ch1*M6T);
else if (lratio <= K7T)
tmp = (ch0*B7T) - (ch1*M7T);
else if (lratio > K8T)
tmp = (ch0*B8T) - (ch1*M8T);
if (tmp < 0) tmp = 0;
tmp += (1<<13);
PRINTFDEBUG("tmp %lu\n", tmp);
return (tmp >> 14);
}
/*---------------------------------------------------------------------------*/
/* Init the light ziglet sensor: ports, pins, registers, interrupts (none enabled), I2C,
default threshold values etc. */
void
light_ziglet_init (void)
{
if (!(_TSL2563_STATUS & INITED))
{
PRINTFDEBUG ("light ziglet init\n");
_TSL2563_STATUS |= INITED;
/* Set up ports and pins for I2C communication */
i2c_enable ();
return;
}
}
/*---------------------------------------------------------------------------*/
/* Write to a 16-bit register.
args:
reg register to write to
val value to write
*/
void
tsl2563_write_reg (uint8_t reg, uint16_t val)
{
uint8_t tx_buf[] = { reg, 0x00, 0x00 };
tx_buf[1] = (uint8_t) (val >> 8);
tx_buf[2] = (uint8_t) (val & 0x00FF);
i2c_transmitinit (TSL2563_ADDR);
while (i2c_busy ());
PRINTFDEBUG ("I2C Ready to TX\n");
i2c_transmit_n (3, tx_buf);
while (i2c_busy ());
PRINTFDEBUG ("WRITE_REG 0x%04X @ reg 0x%02X\n", val, reg);
}
/*---------------------------------------------------------------------------*/
/* Read register.
args:
reg what register to read
returns the value of the read register type uint16_t
*/
uint16_t
tsl2563_read_reg (uint8_t reg)
{
uint16_t readBuf[] = {0x00, 0x00};
uint8_t buf[] = { 0x00, 0x00, 0x00, 0x00};
uint16_t retVal = 0;
uint8_t rtx = reg;
// Transmit the register to read
i2c_transmitinit (TSL2563_ADDR);
while (i2c_busy ());
i2c_transmit_n (1, &rtx);
while (i2c_busy ());
// Receive the data
i2c_receiveinit (TSL2563_ADDR);
while (i2c_busy ());
i2c_receive_n (4, &buf[0]);
while (i2c_busy ());
PRINTFDEBUG("\nb0 %u, b1 %u, b2 %u, b3 %u\n", buf[0], buf[1], buf[2], buf[3]);
readBuf[0] = (buf[1] << 8 | (buf[0]));
readBuf[1] = (buf[3] << 8 | (buf[2]));
/* XXX Quick hack, was receiving dups bytes */
if(readBuf[0] == readBuf[1]){
tsl2563_read_reg(TSL2563_READ);
return;
} else {
retVal = calculateLux(&readBuf);
return retVal;
}
}
uint16_t
light_ziglet_on(void)
{
uint16_t data;
uint8_t regon[] = { 0x00, TSL2563_PWRN };
// Turn on the sensor
i2c_transmitinit (TSL2563_ADDR);
while (i2c_busy ());
i2c_transmit_n (2, &regon);
while (i2c_busy ());
data = (uint16_t) tsl2563_read_reg (TSL2563_READ);
return data;
}
void
light_ziglet_off(void)
{
uint8_t regoff = 0x00;
// Turn off the sensor
i2c_transmitinit (TSL2563_ADDR);
while (i2c_busy ());
i2c_transmit_n (1, &regoff);
while (i2c_busy ());
return;
}
/*---------------------------------------------------------------------------*/
/* Read light ziglet sensor
*/
uint16_t
light_ziglet_read(void)
{
uint16_t lux = 0;
lux = light_ziglet_on();
light_ziglet_off();
return lux;
}