Streamline the management of multiple LEDs with A80604-1 and STM32F417ZG
Brighten your world, simply and efficiently!
Published Sep 09, 2023
Click board™
LED Driver 13 Click
Dev Board
Fusion for STM32 v8
Compiler
NECTO Studio
MCU
STM32F417ZG
Transform your lighting setups into masterpieces with our LED driver solution, offering effortless control for multiple LEDs, so you can focus on the brilliance of your designs
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Hardware Overview
How does it work?
LED Driver 13 Click is based on the A80604-1, a multi-output LED driver for automotive applications designed at a switching frequency of 400kHz from Allegro Microsystems. The A80604-1 implements a current-mode boost/SEPIC converter with a gate driver for onboard external N-channel MOSFET. Thus, it provides an output current of 150mA per channel at an output voltage of approximately 26V, limited by the input voltage of the A80604-1, which must be in the range of 6V to 18V for proper operation. It also has integrated protection circuitry to guard against output short, overvoltage, LED short-circuits protections, and overtemperature. This Click board™ offers two ways to implement LED dimming: analog dimming via an onboard potentiometer or through an external PWM signal applied on the onboard header labeled as PWM and PWM dimming using a PWM pin from the mikroBUS™
socket. Using the patented Pre-Emptive Boost control, an LED brightness contrast ratio of 15,000:1 can be achieved using PWM dimming 200Hz. A higher ratio of 150,000:1 is possible using a combination of PWM and analog dimming. The analog dimming selection can be made by positioning the SMD jumper labeled ADIM SEL to an appropriate position marked as POT or PWM. The switching frequency of the A80604-1 can be externally synchronized to an external clock or generated internally - programmed between 260kHz and 2.3MHz. The spread-spectrum technique (with user-programmable dithering range and modulation frequency) is provided to reduce EMI. A clock-out signal, available on the onboard header labeled CLKO, allows other converters to be synchronized to the switching frequency of A80604-1. As mentioned in the product description, LED Driver 13 Click
communicates with MCU using several GPIO pins. The Enable pin, labeled as EN of the mikroBUS™ socket, optimizes power consumption used for power ON/OFF purposes of the board. In addition, it also uses a fault pin labeled as FLT and routed to the INT pin of the mikroBUS™ socket, which indicates the previously mentioned fault conditions to an external system if any fault occurs during operation. This fault signal is also visually indicated via a red LED labeled FAULT. Once the fault is removed, the soft-start process will continue. This Click board™ can operate with either 3.3V or 5V logic voltage levels selected via the VCC SEL jumper. This way, both 3.3V and 5V capable MCUs can use the communication lines properly. Also, this Click board™ comes equipped with a library containing easy-to-use functions and an example code that can be used as a reference for further development.
Features overview
Development board
Fusion for STM32 v8 is a development board specially designed for the needs of rapid development of embedded applications. It supports a wide range of microcontrollers, such as different 32-bit ARM® Cortex®-M based MCUs from STMicroelectronics, regardless of their number of pins, and a broad set of unique functions, such as the first-ever embedded debugger/programmer over WiFi. The development board is well organized and designed so that the end-user has all the necessary elements, such as switches, buttons, indicators, connectors, and others, in one place. Thanks to innovative manufacturing technology, Fusion for STM32 v8 provides a fluid and immersive working experience, allowing
access anywhere and under any circumstances at any time. Each part of the Fusion for STM32 v8 development board contains the components necessary for the most efficient operation of the same board. An advanced integrated CODEGRIP programmer/debugger module offers many valuable programming/debugging options, including support for JTAG, SWD, and SWO Trace (Single Wire Output)), and seamless integration with the Mikroe software environment. Besides, it also includes a clean and regulated power supply module for the development board. It can use a wide range of external power sources, including a battery, an external 12V power supply, and a power source via the USB Type-C (USB-C) connector.
Communication options such as USB-UART, USB HOST/DEVICE, CAN (on the MCU card, if supported), and Ethernet is also included. In addition, it also has the well-established mikroBUS™ standard, a standardized socket for the MCU card (SiBRAIN standard), and two display options for the TFT board line of products and character-based LCD. Fusion for STM32 v8 is an integral part of the Mikroe ecosystem for rapid development. Natively supported by Mikroe software tools, it covers many aspects of prototyping and development thanks to a considerable number of different Click boards™ (over a thousand boards), the number of which is growing every day.
Microcontroller Overview
MCU Card / MCU
Type
8th Generation
Architecture
ARM Cortex-M4
MCU Memory (KB)
1024
Silicon Vendor
STMicroelectronics
Pin count
144
RAM (Bytes)
196608
Used MCU Pins
mikroBUS™ mapper
Take a closer look
Schematic
Step by step
Project assembly
Start by selecting your development board and Click board™. Begin with the Fusion for STM32 v8 as your development board.
Track your results in real time
Application Output
After pressing the "FLASH" button on the left-side panel, it is necessary to open the UART terminal to display the achieved results. By clicking on the Tools icon in the right-hand panel, multiple different functions are displayed, among which is the UART Terminal. Click on the offered "UART Terminal" icon.
Once the UART terminal is opened, the window takes on a new form. At the top of the tab are two buttons, one for adjusting the parameters of the UART terminal and the other for connecting the UART terminal. The tab's lower part is reserved for displaying the achieved results. Before connecting, the terminal has a Disconnected status, indicating that the terminal is not yet active. Before connecting, it is necessary to check the set parameters of the UART terminal. Click on the "OPTIONS" button.
In the newly opened UART Terminal Options field, we check if the terminal settings are correct, such as the set port and the Baud rate of UART communication. If the data is not displayed properly, it is possible that the Baud rate value is not set correctly and needs to be adjusted to 115200. If all the parameters are set correctly, click on "CONFIGURE".
The next step is to click on the "CONNECT" button, after which the terminal status changes from Disconnected to Connected in green, and the data is displayed in the Received data field.
Software Support
Library Description
This library contains API for LED Driver 13 Click driver.
Key functions:
leddriver13_set_enable- LED Driver 13 set enable functionleddriver13_pwm_start- LED Driver 13 start PWM moduleleddriver13_set_duty_cycle- LED Driver 13 sets PWM duty cycle
Open Source
Code example
This example can be found in NECTO Studio. Feel free to download the code, or you can copy the code below.
/*!
* @file main.c
* @brief LEDDriver13 Click example
*
* # Description
* This library contains API for LED Driver 13 Click driver.
*
* The demo application is composed of two sections :
*
* ## Application Init
* Initializes the driver and executes the click default configuration which
* starts the PWM module and sets the LEDs current to minimum.
*
* ## Application Task
* This is an example that demonstrates the use of the LED Driver 13 Click board™.
* The app controls the LEDs brightness by changing the PWM duty cycle.
* The PWM duty cycle percentage will be logged on the USB UART.
*
* @author Nenad Filipovic
*
*/
#include "board.h"
#include "log.h"
#include "leddriver13.h"
static leddriver13_t leddriver13;
static log_t logger;
void application_init ( void )
{
log_cfg_t log_cfg; /**< Logger config object. */
leddriver13_cfg_t leddriver13_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.
leddriver13_cfg_setup( &leddriver13_cfg );
LEDDRIVER13_MAP_MIKROBUS( leddriver13_cfg, MIKROBUS_1 );
if ( PWM_ERROR == leddriver13_init( &leddriver13, &leddriver13_cfg ) )
{
log_error( &logger, " Communication init." );
for ( ; ; );
}
if ( LEDDRIVER13_ERROR == leddriver13_default_cfg ( &leddriver13 ) )
{
log_error( &logger, " Default configuration." );
for ( ; ; );
}
log_info( &logger, " Application Task " );
leddriver13_set_duty_cycle ( &leddriver13, 0.01 );
Delay_ms( 100 );
}
void application_task ( void )
{
static int8_t duty_cnt = 1;
static int8_t duty_inc = 1;
float duty = duty_cnt / 1000.0;
leddriver13_set_duty_cycle ( &leddriver13, duty );
log_printf( &logger, "> Duty: %.1f%%\r\n", duty * 100 );
Delay_ms( 100 );
if ( 30 == duty_cnt )
{
duty_inc = -1;
}
else if ( 0 == duty_cnt )
{
duty_inc = 1;
}
duty_cnt += duty_inc;
}
void main ( void )
{
application_init( );
for ( ; ; )
{
application_task( );
}
}
// ------------------------------------------------------------------------ END
