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@0:ce75ae1e8fc7, 2017-02-04 (annotated)

Committer:
AzqDev
Date:
Sat Feb 04 07:19:09 2017 +0000
Revision:
0:ce75ae1e8fc7
Child:
2:c16cb655d4a4
Initial commit

Who changed what in which revision?

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