leddriver16  2.1.0.0
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LED Driver 16 click

LED Driver 16 Click is a compact add-on board that simplifies the control of multiple LEDs. This board features the PCA9745B, an SPI-configurable sixteen-channel constant current LED driver from NXP Semiconductors. Each LED output has an 8-bit resolution (256 steps) fixed-frequency individual PWM controller that operates at 31.25kHz with an adjustable duty cycle from 0 to 100% to allow the LED to be set to a specific brightness value. Powered through a selected mikroBUS™ power rail, either 3.3V or 5V, it provides a maximum output current of 57mA per channel and multiple built-in protection functions that protect the circuit during abnormalities.

click Product page


Click library

  • Author : Stefan Filipovic
  • Date : Feb 2023.
  • Type : SPI type

Software Support

We provide a library for the LED Driver 16 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.

Library Description

This library contains API for LED Driver 16 Click driver.

Standard key functions :

Example key functions :

  • leddriver16_set_led_state This function sets the output state for the specified LEDs.
    err_t leddriver16_set_led_state ( leddriver16_t *ctx, uint16_t led_ch_mask, uint8_t state );
  • leddriver16_set_led_pwm This function sets the PWM duty cycle for the specified LEDs.
    err_t leddriver16_set_led_pwm ( leddriver16_t *ctx, uint16_t led_ch_mask, uint8_t duty_cycle );
  • leddriver16_set_led_iref This function sets the gain settings for output current for the specified LEDs.
    err_t leddriver16_set_led_iref ( leddriver16_t *ctx, uint16_t led_ch_mask, uint8_t iref );

Example Description

This example demonstrates the use of LED Driver 16 click board by performing 3 different types of LED control (LED PWM dimming, LED blinking, and LED curtain).

The demo application is composed of two sections :

Application Init

Initializes the driver and performs the click default configuration.

void application_init ( void )
{
log_cfg_t log_cfg;
leddriver16_cfg_t leddriver16_cfg;
LOG_MAP_USB_UART( log_cfg );
log_init( &logger, &log_cfg );
log_info( &logger, " Application Init " );
// Click initialization.
leddriver16_cfg_setup( &leddriver16_cfg );
LEDDRIVER16_MAP_MIKROBUS( leddriver16_cfg, MIKROBUS_1 );
if ( SPI_MASTER_ERROR == leddriver16_init( &leddriver16, &leddriver16_cfg ) )
{
log_error( &logger, " Communication init." );
for ( ; ; );
}
if ( LEDDRIVER16_ERROR == leddriver16_default_cfg ( &leddriver16 ) )
{
log_error( &logger, " Default configuration." );
for ( ; ; );
}
log_info( &logger, " Application Task " );
}

Application Task

Performs 3 different types of LED control examples. Each example repeats 5 times before

switching to another. The name of the currently set example will be displayed on the USB UART accordingly.

  • Example 1: LED PWM dimming - starts with min PWM duty cycle and increases it to max, then decreases it to min duty cycle in a loop with a 5ms delay on duty change.
  • Example 2: LED blinking - toggles all LEDs state from ON to OFF and vice-versa with a 500ms delay in between.
  • Example 3: LED curtain - turns ON the LEDs one by one from LED0 to LED15 with a 100ms delay on transition to the next LED.
void application_task ( void )
{
static uint8_t example_repeat_num = 5;
uint8_t repeat_cnt = 0;
log_printf( &logger, " LED PWM dimming\r\n\n" );
while ( repeat_cnt < example_repeat_num )
{
uint8_t pwm_duty = LEDDRIVER16_PWM_DUTY_MIN;
while ( pwm_duty < LEDDRIVER16_PWM_DUTY_MAX )
{
Delay_ms ( 5 );
pwm_duty++;
}
while ( pwm_duty > LEDDRIVER16_PWM_DUTY_MIN )
{
Delay_ms ( 5 );
pwm_duty--;
}
Delay_ms ( 100 );
repeat_cnt++;
}
log_printf( &logger, " LED blinking\r\n\n" );
repeat_cnt = 0;
while ( repeat_cnt < example_repeat_num )
{
Delay_ms ( 500 );
Delay_ms ( 500 );
repeat_cnt++;
}
log_printf( &logger, " LED curtain\r\n\n" );
repeat_cnt = 0;
while ( repeat_cnt < example_repeat_num )
{
uint8_t led_cnt = 0;
while ( led_cnt < 16 )
{
Delay_ms ( 100 );
led_cnt++;
}
Delay_ms ( 500 );
repeat_cnt++;
}
}

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.LEDDriver16

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.


LEDDRIVER16_LEDOUT_PWM_ALL
#define LEDDRIVER16_LEDOUT_PWM_ALL
Definition: leddriver16.h:180
leddriver16_set_led_iref
err_t leddriver16_set_led_iref(leddriver16_t *ctx, uint16_t led_ch_mask, uint8_t iref)
LED Driver 16 set led iref function.
leddriver16_t
LED Driver 16 Click context object.
Definition: leddriver16.h:267
leddriver16_set_led_state
err_t leddriver16_set_led_state(leddriver16_t *ctx, uint16_t led_ch_mask, uint8_t state)
LED Driver 16 set led state function.
LEDDRIVER16_LEDOUT_ON
#define LEDDRIVER16_LEDOUT_ON
Definition: leddriver16.h:179
leddriver16_cfg_setup
void leddriver16_cfg_setup(leddriver16_cfg_t *cfg)
LED Driver 16 configuration object setup function.
LEDDRIVER16_PWM_DUTY_MAX
#define LEDDRIVER16_PWM_DUTY_MAX
Definition: leddriver16.h:189
application_task
void application_task(void)
Definition: main.c:73
LEDDRIVER16_PWM_DUTY_MIN
#define LEDDRIVER16_PWM_DUTY_MIN
LED Driver 16 PWMx register setting.
Definition: leddriver16.h:188
LEDDRIVER16_ERROR
@ LEDDRIVER16_ERROR
Definition: leddriver16.h:309
LEDDRIVER16_LEDOUT_OFF
#define LEDDRIVER16_LEDOUT_OFF
LED Driver 16 LEDOUTx register setting.
Definition: leddriver16.h:178
LEDDRIVER16_LED_CHANNEL_0
#define LEDDRIVER16_LED_CHANNEL_0
LED Driver 16 LED channel setting.
Definition: leddriver16.h:202
leddriver16_set_led_pwm
err_t leddriver16_set_led_pwm(leddriver16_t *ctx, uint16_t led_ch_mask, uint8_t duty_cycle)
LED Driver 16 set led pwm function.
leddriver16_default_cfg
err_t leddriver16_default_cfg(leddriver16_t *ctx)
LED Driver 16 default configuration function.
application_init
void application_init(void)
Definition: main.c:37
LEDDRIVER16_LED_CHANNEL_ALL
#define LEDDRIVER16_LED_CHANNEL_ALL
Definition: leddriver16.h:222
leddriver16_init
err_t leddriver16_init(leddriver16_t *ctx, leddriver16_cfg_t *cfg)
LED Driver 16 initialization function.
LEDDRIVER16_MAP_MIKROBUS
#define LEDDRIVER16_MAP_MIKROBUS(cfg, mikrobus)
MikroBUS pin mapping.
Definition: leddriver16.h:251
leddriver16_cfg_t
LED Driver 16 Click configuration object.
Definition: leddriver16.h:284