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LED Driver 12 Click is a compact add-on board that simplifies the control of multiple LEDs. This board features the PCA9532, a 16-bit I2C-configurable I/O expander optimized for dimming LEDs in 256 discrete Red/Green/Blue (RGB) steps from NXP Semiconductors. The PCA9532 offers high efficiency, supporting up to 16 LED channels and delivering a maximum of up to 25mA of LED current per channel. It contains an internal oscillator with two user-programmable blink rates and duty cycles coupled to the output PWM. Any bits not used for controlling the LEDs can be used for GPIO expansion, which provides a simple solution when additional I/O is needed for some sensors, push-buttons, or alarm monitoring. This Click board™ is suitable for color mixing and backlight application for amusement products, LED status signalization, home automation projects, and many more.
- Author : Stefan Filipovic
- Date : Dec 2021.
- Type : I2C type
We provide a library for the LED Driver 12 Click as well as a demo application (example), developed using MikroElektronika compilers. The demo can run on all the main MikroElektronika development boards.
Package can be downloaded/installed directly from NECTO Studio Package Manager(recommended way), downloaded from our LibStock™ or found on Mikroe github account.
This library contains API for LED Driver 12 Click driver.
leddriver12_cfg_setup
Config Object Initialization function.
void leddriver12_cfg_setup ( leddriver12_cfg_t *cfg );
leddriver12_init
Initialization function.
err_t leddriver12_init ( leddriver12_t *ctx, leddriver12_cfg_t *cfg );
leddriver12_default_cfg
Click Default Configuration function.
err_t leddriver12_default_cfg ( leddriver12_t *ctx );
leddriver12_set_led_config
This function sets the specified LED config.
err_t leddriver12_set_led_config ( leddriver12_t *ctx, uint8_t led_number, uint8_t led_cfg );
leddriver12_set_led_port_config
This function sets the specified LED port config.
err_t leddriver12_set_led_port_config ( leddriver12_t *ctx, uint8_t led_port_number, uint8_t led_cfg );
leddriver12_set_blink_period_pwm_0
This function sets the blink period of PWM 0 function.
err_t leddriver12_set_blink_period_pwm_0 ( leddriver12_t *ctx, float blink_period );
This example demonstrates the use of LED Driver 12 click board.
The demo application is composed of two sections :
Initializes the driver and performs the click default configuration which turns OFF the LEDs 0 to 7, configures LEDs 8 to 11 for PWM0, and LEDs 12 to 15 for PWM1 settings. PWM0 is set at half duty cycle with a one-second blinking period, while PWM1 is configured for a quarter of duty cycle with a half-second blinking period.
void application_init ( void )
{
log_cfg_t log_cfg; /**< Logger config object. */
leddriver12_cfg_t leddriver12_cfg; /**< Click config object. */
/**
* Logger initialization.
* Default baud rate: 115200
* Default log level: LOG_LEVEL_DEBUG
* @note If USB_UART_RX and USB_UART_TX
* are defined as HAL_PIN_NC, you will
* need to define them manually for log to work.
* See @b LOG_MAP_USB_UART macro definition for detailed explanation.
*/
LOG_MAP_USB_UART( log_cfg );
log_init( &logger, &log_cfg );
log_info( &logger, " Application Init " );
// Click initialization.
leddriver12_cfg_setup( &leddriver12_cfg );
LEDDRIVER12_MAP_MIKROBUS( leddriver12_cfg, MIKROBUS_1 );
if ( I2C_MASTER_ERROR == leddriver12_init( &leddriver12, &leddriver12_cfg ) )
{
log_error( &logger, " Communication init." );
for ( ; ; );
}
if ( LEDDRIVER12_ERROR == leddriver12_default_cfg ( &leddriver12 ) )
{
log_error( &logger, " Default configuration." );
for ( ; ; );
}
log_info( &logger, " Application Task " );
}
Toggles the LEDs 0-7 every 2 seconds and displays their state on the USB UART.
void application_task ( void )
{
leddriver12_set_led_port_config ( &leddriver12, LEDDRIVER12_LED0_TO_3, LEDDRIVER12_LED_ON );
leddriver12_set_led_port_config ( &leddriver12, LEDDRIVER12_LED4_TO_7, LEDDRIVER12_LED_ON );
log_printf ( &logger, " LEDs 0-7 turns ON \r\n" );
Delay_ms ( 1000 );
Delay_ms ( 1000 );
leddriver12_set_led_port_config ( &leddriver12, LEDDRIVER12_LED0_TO_3, LEDDRIVER12_LED_OFF );
leddriver12_set_led_port_config ( &leddriver12, LEDDRIVER12_LED4_TO_7, LEDDRIVER12_LED_OFF );
log_printf ( &logger, " LEDs 0-7 turns OFF \r\n\n" );
Delay_ms ( 1000 );
Delay_ms ( 1000 );
}
The full application code, and ready to use projects can be installed directly from NECTO Studio Package Manager(recommended way), downloaded from our LibStock™ or found on Mikroe github account.
Other Mikroe Libraries used in the example:
- MikroSDK.Board
- MikroSDK.Log
- Click.LEDDriver12
Additional notes and informations
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. UART terminal is available in all MikroElektronika compilers.