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Driver for Proximity / Ambient Light Sensor VCNL40xx from Vishay
main.cpp
- Committer:
- kokisan2000
- Date:
- 2013-11-30
- Revision:
- 0:1f3d09f0060a
- Child:
- 1:cf336a5443e3
File content as of revision 0:1f3d09f0060a:
/* 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