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Driver for Proximity / Ambient Light Sensor VCNL40xx from Vishay
Diff: main.cpp
- Revision:
- 0:1f3d09f0060a
- Child:
- 1:cf336a5443e3
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/main.cpp Sat Nov 30 19:44:13 2013 +0000 @@ -0,0 +1,351 @@ +/* +Copyright (c) 2012 Vishay GmbH, www.vishay.com +author: DS, version 1.2 + +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. +*/ + +#define VERSION "\n Version: 1.2 01/2012\n" +#define MAIN1 // select MAIN1, MAIN2, MAIN3 or MIAN4 +#define BAUD 115200 // increase up to 921600 for high speed communication (depends on terminal programm and USB mode) + +#include "mbed.h" +#include "VCNL40x0.h" + +VCNL40x0 VCNL40x0_Device (p28, p27, VCNL40x0_ADDRESS); // Define SDA, SCL pin and I2C address +DigitalOut mled0(LED1); // LED #1 +DigitalOut mled1(LED2); // LED #2 +DigitalOut mled2(LED3); // LED #3 +Serial pc(USBTX, USBRX); // Tx, Rx USB transmission + +///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////// +// main #1 +// Read Proximity on demand and Ambillight on demand in endless loop +///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////// +# ifdef MAIN1 + +int main() { + unsigned char ID=0; + unsigned char Current=0; + unsigned int ProxiValue=0; + unsigned int AmbiValue=0; + + pc.baud(BAUD); // set USB speed (virtual COM port) + + // print information on screen + pc.printf("\n\n VCNL4010/4020 Proximity/Ambient Light Sensor"); + pc.printf("\n library tested with mbed LPC1768 (ARM Cortex-M3 core) on www.mbed.org"); + pc.printf(VERSION); + pc.printf("\n Demonstration #1:"); + pc.printf("\n Read Proximity on demand and Ambillight on demand in endless loop"); + + VCNL40x0_Device.ReadID (&ID); // Read VCNL40x0 product ID revision register + pc.printf("\n\n Product ID Revision Register: %d", ID); + + VCNL40x0_Device.SetCurrent (20); // Set current to 200mA + VCNL40x0_Device.ReadCurrent (&Current); // Read back IR LED current + pc.printf("\n IR LED Current: %d\n\n", Current); + + wait_ms(3000); // wait 3s (only for display) + +// endless loop ///////////////////////////////////////////////////////////////////////////////////// + + while (1) { + mled0 = 1; // LED on + VCNL40x0_Device.ReadProxiOnDemand (&ProxiValue); // read prox value on demand + VCNL40x0_Device.ReadAmbiOnDemand (&AmbiValue); // read ambi value on demand + mled0 = 0; // LED off + + // pront values on screen + pc.printf("\nProxi: %5.0i cts \tAmbi: %5.0i cts \tIlluminance: %7.2f lx", ProxiValue, AmbiValue, AmbiValue/4.0); + } +} +# endif + +///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////// +// main #2 +// Proximity Measurement in selfetimed mode with 4 measurements/s +// Read prox value if ready with conversion, endless loop +///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////// +# ifdef MAIN2 + +int main() { + unsigned char ID=0; + unsigned char Command=0; + unsigned char Current=0; + unsigned int ProxiValue=0; + unsigned int AmbiValue=0; + + pc.baud(BAUD); + + // print information on screen + pc.printf("\n\n VCNL4010/4020 Proximity/Ambient Light Sensor"); + pc.printf("\n library tested with mbed LPC1768 (ARM Cortex-M3 core) on www.mbed.org"); + pc.printf(VERSION); + pc.printf("\n Demonstration #2:"); + pc.printf("\n Proximity Measurement in selftimed mode with 4 measurements/s"); + pc.printf("\n Read prox value if ready with conversion, endless loop"); + + VCNL40x0_Device.ReadID (&ID); // Read VCNL40x0 product ID revision register + pc.printf("\n\n Product ID Revision Register: %d", ID); + + VCNL40x0_Device.SetCurrent (20); // Set current to 200mA + VCNL40x0_Device.ReadCurrent (&Current); // Read back IR LED current + pc.printf("\n IR LED Current: %d\n\n", Current); + + VCNL40x0_Device.SetProximityRate (PROX_MEASUREMENT_RATE_4); // set proximity rate to 4/s + + // enable prox in selftimed mode + VCNL40x0_Device.SetCommandRegister (COMMAND_PROX_ENABLE | COMMAND_SELFTIMED_MODE_ENABLE); + + wait_ms(3000); // wait 3s (only for display) + +// endless loop ///////////////////////////////////////////////////////////////////////////////////// + + while (1) { + + // wait on prox data ready bit + do { + VCNL40x0_Device.ReadCommandRegister (&Command); // read command register + } while (!(Command & COMMAND_MASK_PROX_DATA_READY));// prox data ready ? + + mled0 = 1; // LED on + VCNL40x0_Device.ReadProxiValue (&ProxiValue); // read prox value + mled0 = 0; // LED off + + // print values on screen + pc.printf("\nProxi: %5.0i cts", ProxiValue); + } +} +# endif + +///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////// +// main #3 +// Proximity Measurement in selfetimed mode with 31 measurements/s +// Interrupt waiting on proximity value > upper threshold limit +///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////// +# ifdef MAIN3 + +int main() { + unsigned char ID=0; + unsigned char Command=0; + unsigned char Current=0; + unsigned int ProxiValue=0; + unsigned int AmbiValue=0; + unsigned char InterruptStatus=0; + unsigned char InterruptControl=0; + + pc.baud(BAUD); + + // print information on screen + pc.printf("\n\n VCNL4010/4020 Proximity/Ambient Light Sensor"); + pc.printf("\n library tested with mbed LPC1768 (ARM Cortex-M3 core) on www.mbed.org"); + pc.printf(VERSION); + pc.printf("\n Demonstration #3:"); + pc.printf("\n Proximity Measurement in selfetimed mode with 31 measurements/s"); + pc.printf("\n Interrupt waiting on proximity value > upper threshold limit"); + + VCNL40x0_Device.ReadID (&ID); // Read VCNL40x0 product ID revision register + pc.printf("\n\n Product ID Revision Register: %d", ID); + + VCNL40x0_Device.SetCurrent (20); // Set current to 200mA + VCNL40x0_Device.ReadCurrent (&Current); // Read back IR LED current + pc.printf("\n IR LED Current: %d\n\n", Current); + + // stop all activities (necessary for changing proximity rate, see datasheet) + VCNL40x0_Device.SetCommandRegister (COMMAND_ALL_DISABLE); + + // set proximity rate to 31/s + VCNL40x0_Device.SetProximityRate (PROX_MEASUREMENT_RATE_31); + + // enable prox in selftimed mode + VCNL40x0_Device.SetCommandRegister (COMMAND_PROX_ENABLE | + COMMAND_SELFTIMED_MODE_ENABLE); + + // set interrupt control register + VCNL40x0_Device.SetInterruptControl (INTERRUPT_THRES_SEL_PROX | + INTERRUPT_THRES_ENABLE | + INTERRUPT_COUNT_EXCEED_1); + + VCNL40x0_Device.ReadInterruptControl (&InterruptControl); // Read back Interrupt Control register + pc.printf("\n Interrupt Control Register: %i\n\n", InterruptControl); + + + // wait on prox data ready bit + do { + VCNL40x0_Device.ReadCommandRegister (&Command); // read command register + } while (!(Command & COMMAND_MASK_PROX_DATA_READY)); // prox data ready ? + + VCNL40x0_Device.ReadProxiValue (&ProxiValue); // read prox value + VCNL40x0_Device.SetHighThreshold (ProxiValue+100); // set high threshold for interrupt + + wait_ms(3000); // wait 3s (only for display) + +// endless loop ///////////////////////////////////////////////////////////////////////////////////// + + while (1) { + + // wait on prox data ready bit + do { + VCNL40x0_Device.ReadCommandRegister (&Command); // read command register + } while (!(Command & COMMAND_MASK_PROX_DATA_READY));// prox data ready ? + + mled0 = 1; // LED on + VCNL40x0_Device.ReadProxiValue (&ProxiValue); // read prox value + mled0 = 0; // LED off + + // read interrupt status register + VCNL40x0_Device.ReadInterruptStatus (&InterruptStatus); + + // print prox value and interrupt status on screen + pc.printf("\nProxi: %5.0i cts \tInterruptStatus: %i", ProxiValue, InterruptStatus); + + // check interrupt status for High Threshold + if (InterruptStatus & INTERRUPT_MASK_STATUS_THRES_HI) { + mled1 = 1; // LED on + VCNL40x0_Device.SetInterruptStatus (InterruptStatus); // clear Interrupt Status + mled1 = 0; // LED on + } + } +} +# endif + +///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////// +// main #4 +// Proximity Measurement and Ambientlight Measurement in selftimed mode +// Proximity with 31 measurements/s, Ambientlight with 2 measurement/s +// Interrupt waiting on proximity value > upper threshold limit +///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////// +# ifdef MAIN4 + +int main() { + unsigned int i=0; + unsigned char ID=0; + unsigned char Command=0; + unsigned char Current=0; + unsigned int ProxiValue=0; + unsigned int SummeProxiValue=0; + unsigned int AverageProxiValue=0; + unsigned int AmbiValue=0; + unsigned char InterruptStatus=0; + unsigned char InterruptControl=0; + + pc.baud(BAUD); + + // print information on screen + pc.printf("\n\n VCNL4010/4020 Proximity/Ambient Light Sensor"); + pc.printf("\n library tested with mbed LPC1768 (ARM Cortex-M3 core) on www.mbed.org"); + pc.printf(VERSION); + pc.printf("\n Demonstration #4:"); + pc.printf("\n Proximity Measurement and Ambient light Measurement in selftimed mode"); + pc.printf("\n Proximity with 31 measurements/s, Ambient light with 2 measurement/s"); + pc.printf("\n Interrupt waiting on proximity value > upper threshold limit"); + + VCNL40x0_Device.ReadID (&ID); // Read VCNL40x0 product ID revision register + pc.printf("\n\n Product ID Revision Register: %d", ID); + + VCNL40x0_Device.SetCurrent (20); // Set current to 200mA + VCNL40x0_Device.ReadCurrent (&Current); // Read back IR LED current + pc.printf("\n IR LED Current: %d", Current); + + // stop all activities (necessary for changing proximity rate, see datasheet) + VCNL40x0_Device.SetCommandRegister (COMMAND_ALL_DISABLE); + + // set proximity rate to 31/s + VCNL40x0_Device.SetProximityRate (PROX_MEASUREMENT_RATE_31); + + // enable prox and ambi in selftimed mode + VCNL40x0_Device.SetCommandRegister (COMMAND_PROX_ENABLE | + COMMAND_AMBI_ENABLE | + COMMAND_SELFTIMED_MODE_ENABLE); + + // set interrupt control for threshold + VCNL40x0_Device.SetInterruptControl (INTERRUPT_THRES_SEL_PROX | + INTERRUPT_THRES_ENABLE | + INTERRUPT_COUNT_EXCEED_1); + + // set ambient light measurement parameter + VCNL40x0_Device.SetAmbiConfiguration (AMBI_PARA_AVERAGE_32 | + AMBI_PARA_AUTO_OFFSET_ENABLE | + AMBI_PARA_MEAS_RATE_2); + + // measure average of prox value + SummeProxiValue = 0; + + for (i=0; i<30; i++) { + do { // wait on prox data ready bit + VCNL40x0_Device.ReadCommandRegister (&Command); // read command register + } while (!(Command & COMMAND_MASK_PROX_DATA_READY)); // prox data ready ? + + VCNL40x0_Device.ReadProxiValue (&ProxiValue); // read prox value + + SummeProxiValue += ProxiValue; // Summary of all measured prox values + } + + AverageProxiValue = SummeProxiValue/30; // calculate average + + VCNL40x0_Device.SetHighThreshold (AverageProxiValue+100); // set upper threshold for interrupt + pc.printf("\n Upper Threshold Value: %i cts\n\n", AverageProxiValue+100); + + wait_ms(2000); // wait 2s (only for display) + +// endless loop ///////////////////////////////////////////////////////////////////////////////////// + + while (1) { + + // wait on data ready bit + do { + VCNL40x0_Device.ReadCommandRegister (&Command); // read command register + } while (!(Command & (COMMAND_MASK_PROX_DATA_READY | COMMAND_MASK_AMBI_DATA_READY))); // data ready ? + + // read interrupt status register + VCNL40x0_Device.ReadInterruptStatus (&InterruptStatus); + + // check interrupt status for High Threshold + if (InterruptStatus & INTERRUPT_MASK_STATUS_THRES_HI) { + mled2 = 1; // LED on, Interrupt + VCNL40x0_Device.SetInterruptStatus (InterruptStatus); // clear Interrupt Status + mled2 = 0; // LED off, Interrupt + } + + // prox value ready for using + if (Command & COMMAND_MASK_PROX_DATA_READY) { + mled0 = 1; // LED on, Prox Data Ready + VCNL40x0_Device.ReadProxiValue (&ProxiValue); // read prox value + + // print prox value and interrupt status on screen + pc.printf("\nProxi: %5.0i cts \tInterruptStatus: %i", ProxiValue, InterruptStatus); + + mled0 = 0; // LED off, Prox data Ready + } + + // ambi value ready for using + if (Command & COMMAND_MASK_AMBI_DATA_READY) { + mled1 = 1; // LED on, Ambi Data Ready + VCNL40x0_Device.ReadAmbiValue (&AmbiValue); // read ambi value + + // print ambi value and interrupt status on screen + pc.printf("\n Ambi: %i", AmbiValue); + + mled1 = 0; // LED off, Ambi Data Ready + } + } +} +# endif +