mirror of
https://github.com/eclipse/upm.git
synced 2025-07-02 09:51:14 +03:00
si1132: Initial Implementation Silicon Labs SI1132 light sensor.
Only visible light readings are currently supported. Signed-off-by: Henry Bruce <henry.bruce@intel.com> Signed-off-by: Abhishek Malik <abhishek.malik@intel.com>
This commit is contained in:
Henry Bruce
committed by
Abhishek Malik
Abhishek Malik
parent
33734dc2e2
commit
4aeccf7714
231
src/si1132/si1132.cxx
Normal file
231
src/si1132/si1132.cxx
Normal file
@ -0,0 +1,231 @@
|
||||
/*
|
||||
* Author: Scott Ware <scott.r.ware@intel.com>
|
||||
* Copyright (c) 2014 Intel Corporation.
|
||||
*
|
||||
* Permission is hereby granted, free of charge, to any person obtaining
|
||||
* a copy of this software and associated documentation files (the
|
||||
* "Software"), to deal in the Software without restriction, including
|
||||
* without limitation the rights to use, copy, modify, merge, publish,
|
||||
* distribute, sublicense, and/or sell copies of the Software, and to
|
||||
* permit persons to whom the Software is furnished to do so, subject to
|
||||
* the following conditions:
|
||||
*
|
||||
* The above copyright notice and this permission notice shall be
|
||||
* included in all copies or substantial portions of the Software.
|
||||
*
|
||||
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
|
||||
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
|
||||
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
|
||||
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
|
||||
* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
|
||||
* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
|
||||
* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
|
||||
*/
|
||||
|
||||
#include <iostream>
|
||||
#include <unistd.h>
|
||||
#include <stdlib.h>
|
||||
#include <math.h>
|
||||
#include <errno.h>
|
||||
|
||||
#include "si1132.h"
|
||||
|
||||
|
||||
#define SI1132_ADDRESS 0x60
|
||||
|
||||
/* REGISTER ADDRESSES */
|
||||
#define SI1132_REG_PART_ID 0x00
|
||||
#define SI1132_REG_INT_CFG 0x03
|
||||
#define SI1132_REG_IRQ_ENABLE 0x04
|
||||
#define SI1132_REG_HW_KEY 0x07
|
||||
#define SI1132_REG_MEAS_RATE0 0x08
|
||||
#define SI1132_REG_MEAS_RATE1 0x09
|
||||
#define SI1132_REG_PARAM_WR 0x17
|
||||
#define SI1132_REG_COMMAND 0x18
|
||||
#define SI1132_REG_RESPONSE 0x20
|
||||
#define SI1132_REG_ALS_VIS_DATA0 0x22
|
||||
#define SI1132_REG_ALS_VIS_DATA1 0x23
|
||||
#define SI1132_REG_PARAM_RD 0x2E
|
||||
#define SI1132_REG_CHIP_STAT 0x30
|
||||
|
||||
/* REGISTER VALUES */
|
||||
#define SI1132_PART_ID 0x32
|
||||
#define SI1132_HW_KEY_INIT 0x17
|
||||
|
||||
/* COMMAND VALUES */
|
||||
#define SI1132_COMMAND_RESET 0x01
|
||||
#define SI1132_COMMAND_ALS_FORCE 0x06
|
||||
#define SI1132_COMMAND_PARAM_QUERY 0x80
|
||||
#define SI1132_COMMAND_PARAM_SET 0xA0
|
||||
#define SI1132_COMMAND_ALS_AUTO 0x0E
|
||||
|
||||
/* PARAMETER RAM ADDRESSES */
|
||||
#define SI1132_PARAM_CHLIST 0x01
|
||||
#define SI1132_PARAM_ALS_VIS_ADC_COUNT 0x10
|
||||
#define SI1132_PARAM_ALS_VIS_ADC_GAIN 0x11
|
||||
#define SI1132_PARAM_ALS_VIS_ADC_MISC 0x12
|
||||
|
||||
/* PARAMETER RAM VALUES */
|
||||
#define SI1132_PARAM_CHLIST_ENALSVIS 0x10
|
||||
#define SI1132_PARAM_ALS_VIS_RANGE_STD 0x00
|
||||
#define SI1132_PARAM_ALS_VIS_RANGE_HI 0x20
|
||||
|
||||
|
||||
|
||||
using namespace upm;
|
||||
|
||||
SI1132::SI1132 (int bus) {
|
||||
i2c = new mraa::I2c(bus);
|
||||
i2c->address(SI1132_ADDRESS);
|
||||
|
||||
// Reset chip to defaults
|
||||
status = reset();
|
||||
if (!isConfigured())
|
||||
UPM_THROW("config failure");
|
||||
}
|
||||
|
||||
SI1132::~SI1132() {
|
||||
delete i2c;
|
||||
}
|
||||
|
||||
mraa::Result SI1132::reset() {
|
||||
i2c->address(SI1132_ADDRESS);
|
||||
|
||||
// Check version
|
||||
uint8_t regValue = i2c->readReg(SI1132_REG_PART_ID);
|
||||
if (regValue != SI1132_PART_ID) {
|
||||
fprintf(stderr, "SI1132: Read ID failed. Data = %02x\n", regValue);
|
||||
status = mraa::ERROR_UNSPECIFIED;
|
||||
return status;
|
||||
}
|
||||
|
||||
// disable automatic updates
|
||||
uint16_t rate = 0;
|
||||
status = i2c->writeWordReg(SI1132_REG_MEAS_RATE0, rate);
|
||||
if (status != mraa::SUCCESS) {
|
||||
fprintf(stderr, "SI1132_REG_MEAS_RATE0 failed\n");
|
||||
return status;
|
||||
}
|
||||
|
||||
// reset device
|
||||
status = i2c->writeReg(SI1132_REG_COMMAND, SI1132_COMMAND_RESET);
|
||||
if (status != mraa::SUCCESS) {
|
||||
fprintf(stderr, "SI1132: Reset failed.\n");
|
||||
status = mraa::ERROR_UNSPECIFIED;
|
||||
return status;
|
||||
}
|
||||
sleepMs(30);
|
||||
|
||||
// start state machine
|
||||
i2c->writeReg(SI1132_REG_HW_KEY, SI1132_HW_KEY_INIT);
|
||||
regValue = i2c->readReg(SI1132_REG_HW_KEY);
|
||||
if (regValue != SI1132_HW_KEY_INIT) {
|
||||
fprintf(stderr, "Si1132: Did not start\n");
|
||||
status = mraa::ERROR_UNSPECIFIED;
|
||||
return status;
|
||||
}
|
||||
|
||||
status = writeParam(SI1132_PARAM_CHLIST, SI1132_PARAM_CHLIST_ENALSVIS);
|
||||
|
||||
// set visible light range for indoor lighting
|
||||
status = writeParam(SI1132_PARAM_ALS_VIS_ADC_MISC, SI1132_PARAM_ALS_VIS_RANGE_STD);
|
||||
|
||||
// set visible light gain to 8
|
||||
status = writeParam(SI1132_PARAM_ALS_VIS_ADC_GAIN, 3);
|
||||
status = writeParam(SI1132_PARAM_ALS_VIS_ADC_COUNT, 3 << 4);
|
||||
return status;
|
||||
}
|
||||
|
||||
|
||||
uint16_t SI1132::getVisibleRaw() {
|
||||
status = runCommand(SI1132_COMMAND_ALS_FORCE);
|
||||
if (status != mraa::SUCCESS)
|
||||
UPM_THROW("command failed");
|
||||
return i2c->readWordReg(SI1132_REG_ALS_VIS_DATA0);
|
||||
}
|
||||
|
||||
|
||||
double SI1132::getVisibleLux() {
|
||||
uint16_t rawValue = getVisibleRaw();
|
||||
if (rawValue < 256)
|
||||
rawValue = 0;
|
||||
else
|
||||
rawValue -= 256;
|
||||
return static_cast<double>(rawValue);
|
||||
}
|
||||
|
||||
bool SI1132::isConfigured() {
|
||||
return status == mraa::SUCCESS;
|
||||
}
|
||||
|
||||
|
||||
mraa::Result SI1132::clearResponseRegister()
|
||||
{
|
||||
uint8_t regValue = 0xFF;
|
||||
status = i2c->writeReg(SI1132_REG_COMMAND, 0);
|
||||
if (status != mraa::SUCCESS)
|
||||
return status;
|
||||
int bytesRead = i2c->readBytesReg(SI1132_REG_RESPONSE, ®Value, 1);
|
||||
if (bytesRead == 1 && regValue == 0)
|
||||
status = mraa::SUCCESS;
|
||||
else
|
||||
status = mraa::ERROR_UNSPECIFIED;
|
||||
return status;
|
||||
}
|
||||
|
||||
mraa::Result SI1132::runCommand(uint8_t command)
|
||||
{
|
||||
uint8_t response = 0;
|
||||
int sleepTimeMs = 5;
|
||||
int timeoutMs = 50;
|
||||
int waitTimeMs = 0;
|
||||
i2c->address(SI1132_ADDRESS);
|
||||
status = clearResponseRegister();
|
||||
if (status != mraa::SUCCESS)
|
||||
return status;
|
||||
status = i2c->writeReg(SI1132_REG_COMMAND, command);
|
||||
if (status != mraa::SUCCESS)
|
||||
return status;
|
||||
while (response == 0 && waitTimeMs < timeoutMs) {
|
||||
response = i2c->readReg(SI1132_REG_RESPONSE);
|
||||
sleepMs(sleepTimeMs);
|
||||
waitTimeMs += sleepTimeMs;
|
||||
}
|
||||
if (response == 0) {
|
||||
status = mraa::ERROR_UNSPECIFIED;
|
||||
fprintf(stderr, "Comand %d failed\n", command);
|
||||
}
|
||||
return status;
|
||||
}
|
||||
|
||||
mraa::Result SI1132::writeParam(uint8_t param, uint8_t value)
|
||||
{
|
||||
i2c->address(SI1132_ADDRESS);
|
||||
status = i2c->writeReg(SI1132_REG_PARAM_WR, value);
|
||||
if (status != mraa::SUCCESS)
|
||||
return status;
|
||||
return runCommand(SI1132_COMMAND_PARAM_SET | param);
|
||||
}
|
||||
|
||||
mraa::Result SI1132::readParam(uint8_t param, uint8_t* value)
|
||||
{
|
||||
status = runCommand(SI1132_COMMAND_PARAM_QUERY | param);
|
||||
if (status != mraa::SUCCESS)
|
||||
return status;
|
||||
if (i2c->readBytesReg(SI1132_REG_PARAM_RD, value, 1) != 1)
|
||||
status = mraa::ERROR_UNSPECIFIED;
|
||||
return status;
|
||||
}
|
||||
|
||||
|
||||
void SI1132::sleepMs(int mseconds)
|
||||
{
|
||||
struct timespec sleepTime;
|
||||
|
||||
sleepTime.tv_sec = mseconds / 1000; // Number of seconds
|
||||
sleepTime.tv_nsec = ( mseconds % 1000 ) * 1000000; // Convert fractional seconds to nanoseconds
|
||||
|
||||
// Iterate nanosleep in a loop until the total sleep time is the original
|
||||
// value of the seconds parameter
|
||||
while ( ( nanosleep( &sleepTime, &sleepTime ) != 0 ) && ( errno == EINTR ) );
|
||||
}
|
||||
Reference in New Issue
Block a user