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Proximity 3 Click
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Author: MikroElektronika Team
Last Updated: 2018-02-13
Category: Measurement
Downloaded: 391 times
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Proximity 3 click is an intelligent proximity and light sensing device, which features the VCNL4100 sensor from Vishay - high sensitivity long distance proximity sensor (PS), ambient light sensor (ALS) and 940 nm IRED, all in one small package.
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Library Description
This library contains a set of functions, necessary to work with the Proximity 3 click.
Key functions
uint16_t prox3_readALS() - Reads value from ALS register
uint16_t prox3_readPS() - Reads value from PS register
uint16_t prox3_getDistance() - Calculating distance
uint16_t prox3_getIlluminance() - Calculating illuminance
Examples Description
This is a simple demonstration of sensor functionality, where the user can read the distance and illuminance data from Proximity 3 click. Distance and illuminance values are sent via UART.
The application is composed of three sections:
- System Initialization - I2C and UART module initialization
- Application Initialization - Sends HAL pointers, and initializes the VCNL4200
- Application Task - Sequencial reading of the distance, proximity and ambient light data from the sensor and logging it to UART, every second
void applicationTask() { // DISTANCE READ AND CONVERT VALUE TO STRING resultPS = prox3_getDistance(); IntToStr( resultPS, txt1 ); // WRITES INFORMATION TO UART UART1_Write_Text( "Proximity: ~ " ); UART1_Write_Text( txt1 ); UART1_Write_Text( " cmrn" ); // AMBIENT LIGHT READ AND CONVERT VALUE TO STRING resultALS = prox3_getIlluminance(); IntToStr( resultALS, txt2 ); // WRITES INFORMATION TO UART UART1_Write_Text( "Ambient Light: " ); UART1_Write_Text( txt2 ); UART1_Write_Text( " luxrn" ); Delay_ms(1000); }
Other mikroE Libraries used in the example:
- I2C
- UART
- Conversions
Additional notes and information
Depending on the development board you are using, you may need USB UART click, USB UART 2 click or RS232 click to connect to your PC, for development systems with no UART to USB interface available on the board. The terminal available in all MikroElektronika compilers, or any other terminal application of your choice, can be used to read the message.