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@2:c16cb655d4a4, 2017-02-06 (annotated)

Committer:
AzqDev
Date:
Mon Feb 06 05:37:22 2017 +0000
Revision:
2:c16cb655d4a4
Parent:
0:ce75ae1e8fc7
Child:
3:e26d7c502309
Required commit message

Who changed what in which revision?

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