Azoteq / IQS62x

Library to read and write Azoteq IQS6xx device registers via I2C.

Dependents:   IQS620_HelloWorld IQS622_HelloWorld IQS624_HelloWorld IQS621_HelloWorld ... more

Library: IQS62x

Library to read and write Azoteq IQS6xx device registers via I2C.

Supported Devices

Components / IQS620A
Ultra low power sensor for magnetic field, capacitive touch and inductive proximity. Empowers next-generation user interfaces.

Components / IQS621
Azoteq IQS621 ultra low power sensor for ambient light, magnetic field, capacitance and inductive proximity. Empowers next-generation user interfaces.

Components / IQS622
Azoteq IQS622 ultra low power sensor for ambient light, active (reflective) IR, magnetic field, capacitance and inductive proximity. Empowers next-generation user interfaces.

Components / IQS624
Ultra low power sensor for rotating magnetic field, capacitive touch, and inductive proximity. Empowers next-generation user interfaces.

Handy Table of ProxFusion Device Features


ALS = Ambient Light Sensor PIR = Passive Infrared

/media/uploads/AzqDev/mbed-azoteq-proxfusion-handy-table-of-product-features.jpg

IQS62x.cpp@3:e26d7c502309, 2017-02-07 (annotated)

Committer:
AzqDev
Date:
Tue Feb 07 23:45:16 2017 +0000
Revision:
3:e26d7c502309
Parent:
2:c16cb655d4a4
Child:
5:653138b5cae9
IQS624 info link

Who changed what in which revision?

UserRevisionLine numberNew contents of line
AzqDev 0:ce75ae1e8fc7 1 // A class library for Azoteq IQS62x devices
AzqDev 3:e26d7c502309 2
AzqDev 2:c16cb655d4a4 3 // Copyright 2017 Azoteq. 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.
AzqDev 2:c16cb655d4a4 4
AzqDev 3:e26d7c502309 5 // More info on IQS624 sensor IC: http://bit.ly/IQS624_info
AzqDev 3:e26d7c502309 6
AzqDev 0:ce75ae1e8fc7 7 #include "IQS62x.h"
AzqDev 0:ce75ae1e8fc7 8
AzqDev 0:ce75ae1e8fc7 9 // constructor
AzqDev 0:ce75ae1e8fc7 10 IQS62xIO::IQS62xIO() :
AzqDev 0:ce75ae1e8fc7 11 i2c( IQS_I2C_DATA_PIN, IQS_I2C_CLOCK_PIN ), // first run the constructor for mbed class I2C
AzqDev 0:ce75ae1e8fc7 12 IQSready( IQS_READY_PIN ) // first run the constructor for mbed class DigitalIn
AzqDev 0:ce75ae1e8fc7 13 {
AzqDev 0:ce75ae1e8fc7 14 registers = I2CBuffer; // pointer to the receive buffer
AzqDev 0:ce75ae1e8fc7 15 I2CErrorCount = 0; // reset I2C error count
AzqDev 0:ce75ae1e8fc7 16 i2c.frequency( I2Cspeed ); // I2C clock frequency
AzqDev 0:ce75ae1e8fc7 17 }
AzqDev 0:ce75ae1e8fc7 18
AzqDev 0:ce75ae1e8fc7 19 // write some configuration data to the IQS62x
AzqDev 0:ce75ae1e8fc7 20 void IQS62xIO::configure() {
AzqDev 0:ce75ae1e8fc7 21 const static char system_register_setup_data [] = { 0xd0, 0x40 };
AzqDev 0:ce75ae1e8fc7 22 int numberOfBytes = sizeof( system_register_setup_data );
AzqDev 0:ce75ae1e8fc7 23 waitForReady();
AzqDev 0:ce75ae1e8fc7 24 // clear the reset bit in register 0xd0
AzqDev 0:ce75ae1e8fc7 25 if(0!=i2c.write(I2C_ADR,system_register_setup_data,numberOfBytes,false))
AzqDev 0:ce75ae1e8fc7 26 I2CErrorCount++;
AzqDev 0:ce75ae1e8fc7 27 }
AzqDev 0:ce75ae1e8fc7 28
AzqDev 0:ce75ae1e8fc7 29 // read all registers from the IQS62x
AzqDev 0:ce75ae1e8fc7 30 void IQS62xIO::readAll() {
AzqDev 0:ce75ae1e8fc7 31 waitForReady();
AzqDev 0:ce75ae1e8fc7 32 const static char i2c_start_address [] = { 0x0 };
AzqDev 0:ce75ae1e8fc7 33 int numberOfBytes = sizeof( i2c_start_address );
AzqDev 0:ce75ae1e8fc7 34 // write 0 to the IQS62x address register
AzqDev 0:ce75ae1e8fc7 35 if(0!=i2c.write(I2C_ADR,i2c_start_address,numberOfBytes,false))
AzqDev 0:ce75ae1e8fc7 36 I2CErrorCount++;
AzqDev 0:ce75ae1e8fc7 37 waitForReady();
AzqDev 0:ce75ae1e8fc7 38 memset(I2CBuffer,0x55,I2CBufferSize); // "clear" i2c receive buffer
AzqDev 0:ce75ae1e8fc7 39 numberOfBytes = NUMBER_OF_REGISTERS;
AzqDev 0:ce75ae1e8fc7 40 // read register values into a buffer
AzqDev 0:ce75ae1e8fc7 41 if(0!=i2c.read(I2C_ADR,I2CBuffer,numberOfBytes,false))
AzqDev 0:ce75ae1e8fc7 42 I2CErrorCount++;
AzqDev 0:ce75ae1e8fc7 43 }
AzqDev 0:ce75ae1e8fc7 44
AzqDev 0:ce75ae1e8fc7 45 // wait for IQS62x to provide a ready signal (low) on IQS62x_ready pin
AzqDev 0:ce75ae1e8fc7 46 void IQS62xIO::waitForReady() {
AzqDev 0:ce75ae1e8fc7 47 int timeout=0;
AzqDev 0:ce75ae1e8fc7 48 while (1) {
AzqDev 0:ce75ae1e8fc7 49 if(IQSready==1) break;
AzqDev 0:ce75ae1e8fc7 50 if (timeout++ > 1000000) goto fatal_error;
AzqDev 0:ce75ae1e8fc7 51 }
AzqDev 0:ce75ae1e8fc7 52 timeout=0;
AzqDev 0:ce75ae1e8fc7 53 while (1) {
AzqDev 0:ce75ae1e8fc7 54 if(IQSready==0) break;
AzqDev 0:ce75ae1e8fc7 55 if (timeout++ > 1000000) goto fatal_error;
AzqDev 0:ce75ae1e8fc7 56 }
AzqDev 0:ce75ae1e8fc7 57 return;
AzqDev 0:ce75ae1e8fc7 58 fatal_error:
AzqDev 0:ce75ae1e8fc7 59 error ("Fatal Error: IQS62x ready pin is not toggling");
AzqDev 0:ce75ae1e8fc7 60 }