Library Description

The library initializes and defines the I2C bus driver and drivers that offer a choice for writing data in the register. The library includes functions for configuring the chip for measurement,  reading one color ratio and light color value. The color value is calculated by converting the RGBC value to HSL value. The user also has the function color7_getColor() which checks the color of the light.

Key functions:

• void color7_writeByte(uint8_t reg, uint8_t _data) - Functions for write one byte in register
• float color7_getColorValue() - Functions for reading the color value in HSL.
• uint8_t color7_getColor(float color_value) - Functions for detecting colors.
• float color7_readColorRatio(uint8_t color) - Functions for reading the color ratio.

Example description

The application is composed of three sections:

• System Initialization - Initializes the I2C module.
• Application Initialization - Initializes the driver init and the configuration chip for measurement.
• Application Task - (code snippet) - Reads the light color and checks which color of the light is detected by the sensor. If the light color is detected, the detected color message is logged on the USB-UART.

void applicationTask()
{
 colorValue = color7_getColorValue();
 isColor = color7_getColor(colorValue);

 switch(isColor)
 {
 case 1:
 {
 mikrobus_logWrite("--- Color: ORANGE ", _LOG_LINE);
 break;
 }
 case 2:
 {
 mikrobus_logWrite("--- Color: RED ", _LOG_LINE);
 break;
 }
 case 3:
 {
 mikrobus_logWrite("--- Color: PINK ", _LOG_LINE);
 break;
 }
 case 4:
 {
 mikrobus_logWrite("--- Color: PURPLE ", _LOG_LINE);
 break;
 }
 case 5:
 {
 mikrobus_logWrite("--- Color: BLUE ", _LOG_LINE);
 break;
 }
 case 6:
 {
 mikrobus_logWrite("--- Color: CYAN ", _LOG_LINE);
 break;
 }
 case 7:
 {
 mikrobus_logWrite("--- Color: GREEN ", _LOG_LINE);
 break;
 }
 case 8:
 {
 mikrobus_logWrite("--- Color: YELLOW ", _LOG_LINE);
 break;
 }
 default:
 {
 break;
 }
 }
 Delay_100ms();
}

Other MikroElektronika libraries used in the example:

• I2C
• UART

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.