Elevate your cooling experience with TC654 and STM32L073RZ
Seamlessly adjust fan speeds for a relaxing atmosphere
Published Feb 26, 2024
Click board™
Fan 5 Click
Dev. board
Nucleo-64 with STM32L073RZ MCU
Compiler
NECTO Studio
MCU
STM32L073RZ
Take control of the perfect airflow with our PWM-mode fan speed controller!
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Hardware Overview
How does it work?
Fan 5 Click is based on the TC654, a fan speed controller from Microchip that allows you to control and monitor the speed of two DC brushless fans. The TC654 is based on the FanSense™ technology, which protects your application against fan failure and eliminates the need for 3-wire fans. With the TC654, the fan speed can be controlled by its input voltage or the serial interface, allowing for high flexibility. The input voltage of the TC654 represents temperature, typically provided by a chosen internal or external thermistor (selected using an NTC SEL jumper). The TC654 controls fan speed according to the system temperature by pulse-width modulating the voltage across the fan. This method reduces the fan'sfan's acoustic noise and extends the fan'sfan's working life. An external N-channel MOSFET, one per channel, controls the
fans. Modulating the voltage applied to the gate of the MOSFETs also modulates the voltage applied to the fan. The PWM output can be adjusted between 30% and 100%, based on the TC654's input voltage, or programmed, as mentioned, via the I2C interface to allow fan speed control without needing an external thermistor. The standard I2C 2-Wire interface reads data and configures settings with a maximum frequency of 100kHz. The TC654 also measures and monitors fan revolutions per minute (RPM), representing a measure of its health. As a fan'sfan's bearings wear out, the fan slows down and eventually stops (locked rotor). The TC654 can detect open, shorted, unconnected, and locked rotor fan conditions by monitoring the fan'sfan's RPM level. Apart from the availability of this information on the FLT pin of the mikroBUS™ socket, this condition can also be
visually detected through the red LED marked with FAULT. The fan RPM data and threshold registers are available over the I2C interface, allowing complete system control. In addition to the two terminals for fan connections, there is another terminal, VFAN, for an external 12V power supply for FAN1. FAN2 uses the necessary supply from the 5V mikroBUS™ power rail. This Click board™ can operate with both 3.3V and 5V logic voltage levels selected via the VCC SEL jumper. This way, both 3.3V and 5V MCUs can use the communication lines correctly. However, the 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
Nucleo-64 with STM32L073RZ MCU offers a cost-effective and adaptable platform for developers to explore new ideas and prototype their designs. This board harnesses the versatility of the STM32 microcontroller, enabling users to select the optimal balance of performance and power consumption for their projects. It accommodates the STM32 microcontroller in the LQFP64 package and includes essential components such as a user LED, which doubles as an ARDUINO® signal, alongside user and reset push-buttons, and a 32.768kHz crystal oscillator for precise timing operations. Designed with expansion and flexibility in mind, the Nucleo-64 board features an ARDUINO® Uno V3 expansion connector and ST morpho extension pin
headers, granting complete access to the STM32's I/Os for comprehensive project integration. Power supply options are adaptable, supporting ST-LINK USB VBUS or external power sources, ensuring adaptability in various development environments. The board also has an on-board ST-LINK debugger/programmer with USB re-enumeration capability, simplifying the programming and debugging process. Moreover, the board is designed to simplify advanced development with its external SMPS for efficient Vcore logic supply, support for USB Device full speed or USB SNK/UFP full speed, and built-in cryptographic features, enhancing both the power efficiency and security of projects. Additional connectivity is
provided through dedicated connectors for external SMPS experimentation, a USB connector for the ST-LINK, and a MIPI® debug connector, expanding the possibilities for hardware interfacing and experimentation. Developers will find extensive support through comprehensive free software libraries and examples, courtesy of the STM32Cube MCU Package. This, combined with compatibility with a wide array of Integrated Development Environments (IDEs), including IAR Embedded Workbench®, MDK-ARM, and STM32CubeIDE, ensures a smooth and efficient development experience, allowing users to fully leverage the capabilities of the Nucleo-64 board in their projects.
Microcontroller Overview
MCU Card / MCU
Architecture
ARM Cortex-M0
MCU Memory (KB)
192
Silicon Vendor
STMicroelectronics
Pin count
64
RAM (Bytes)
20480
You complete me!
Accessories
Click Shield for Nucleo-64 comes equipped with two proprietary mikroBUS™ sockets, allowing all the Click board™ devices to be interfaced with the STM32 Nucleo-64 board with no effort. This way, Mikroe allows its users to add any functionality from our ever-growing range of Click boards™, such as WiFi, GSM, GPS, Bluetooth, ZigBee, environmental sensors, LEDs, speech recognition, motor control, movement sensors, and many more. More than 1537 Click boards™, which can be stacked and integrated, are at your disposal. The STM32 Nucleo-64 boards are based on the microcontrollers in 64-pin packages, a 32-bit MCU with an ARM Cortex M4 processor operating at 84MHz, 512Kb Flash, and 96KB SRAM, divided into two regions where the top section represents the ST-Link/V2 debugger and programmer while the bottom section of the board is an actual development board. These boards are controlled and powered conveniently through a USB connection to program and efficiently debug the Nucleo-64 board out of the box, with an additional USB cable connected to the USB mini port on the board. Most of the STM32 microcontroller pins are brought to the IO pins on the left and right edge of the board, which are then connected to two existing mikroBUS™ sockets. This Click Shield also has several switches that perform functions such as selecting the logic levels of analog signals on mikroBUS™ sockets and selecting logic voltage levels of the mikroBUS™ sockets themselves. Besides, the user is offered the possibility of using any Click board™ with the help of existing bidirectional level-shifting voltage translators, regardless of whether the Click board™ operates at a 3.3V or 5V logic voltage level. Once you connect the STM32 Nucleo-64 board with our Click Shield for Nucleo-64, you can access hundreds of Click boards™, working with 3.3V or 5V logic voltage levels.
Used MCU Pins
mikroBUS™ mapper
Take a closer look
Click board™ Schematic
Step by step
Project assembly
Start by selecting your development board and Click board™. Begin with the Nucleo-64 with STM32L073RZ MCU as your development board.
Track your results in real time
Application Output
1. Application Output - In Debug mode, the 'Application Output' window enables real-time data monitoring, offering direct insight into execution results. Ensure proper data display by configuring the environment correctly using the provided tutorial.
2. UART Terminal - Use the UART Terminal to monitor data transmission via a USB to UART converter, allowing direct communication between the Click board™ and your development system. Configure the baud rate and other serial settings according to your project's requirements to ensure proper functionality. For step-by-step setup instructions, refer to the provided tutorial.
3. Plot Output - The Plot feature offers a powerful way to visualize real-time sensor data, enabling trend analysis, debugging, and comparison of multiple data points. To set it up correctly, follow the provided tutorial, which includes a step-by-step example of using the Plot feature to display Click board™ readings. To use the Plot feature in your code, use the function: plot(*insert_graph_name*, variable_name);. This is a general format, and it is up to the user to replace 'insert_graph_name' with the actual graph name and 'variable_name' with the parameter to be displayed.
Software Support
Library Description
This library contains API for Fan 5 Click driver.
Key functions:
fan5_get_rpm1- Fan 5 get speed of FAN1fan5_set_duty_cycle- Fan 5 set duty cyclefan5_turn_on_fans- Fan 5 turn on fans
Open Source
Code example
The complete application code and a ready-to-use project are available through the NECTO Studio Package Manager for direct installation in the NECTO Studio. The application code can also be found on the MIKROE GitHub account.
/*!
* @file main.c
* @brief Fan 5 Click example
*
* # Description
* This example demonstrates the use of FAN 5 Click board by controlling and
* regulating the fan motors speed.
*
* The demo application is composed of two sections :
*
* ## Application Init
* Initializes the driver, performs the Click default configuration, reads
* manufacturer id and sets configuration in correspondence to user-selected mode.
*
* ## Application Task
* If Fan control is selected example will monitor FAN 1 speed and if the speed
* falls below 500 RPM for longer then 2.4 seconds fan output will be disabled.
* In other case, example is showcasing speed control by changing duty cycle and
* monitoring fan speed.
*
* @author Stefan Ilic
*
*/
#include "board.h"
#include "log.h"
#include "fan5.h"
#define FAN_CONTROL_MODE
static fan5_t fan5;
static log_t logger;
void application_init ( void )
{
log_cfg_t log_cfg; /**< Logger config object. */
fan5_cfg_t fan5_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.
fan5_cfg_setup( &fan5_cfg );
FAN5_MAP_MIKROBUS( fan5_cfg, MIKROBUS_1 );
if ( I2C_MASTER_ERROR == fan5_init( &fan5, &fan5_cfg ) )
{
log_error( &logger, " Communication init." );
for ( ; ; );
}
if ( FAN5_ERROR == fan5_default_cfg ( &fan5 ) )
{
log_error( &logger, " Default configuration." );
for ( ; ; );
}
fan5_turn_on_fans( &fan5 );
uint8_t id = 0;
fan5_get_mfr_id( &fan5, &id );
log_printf( &logger, " Manufacturer ID: 0x%X \r\n", ( uint16_t ) id );
#if defined FAN_CONTROL_MODE
fan5_set_duty_cycle( &fan5, FAN5_100_PER_DUTY );
fan5_set_fan_fault1( &fan5, 500 );
#else
fan5_set_duty_cycle( &fan5, FAN5_30_PER_DUTY );
fan5_set_fan_fault1( &fan5, 0 );
#endif
log_info( &logger, " Application Task " );
}
void application_task ( void )
{
#if defined FAN_CONTROL_MODE
uint16_t speed = 0;
uint8_t flag_data = 0;
fan5_get_rpm1( &fan5, &speed);
log_printf( &logger, " SPEED: %d RPM \r\n", speed );
if ( FAN5_FAULT == fan5_get_fault_state( &fan5 ) )
{
fan5_get_status_flags ( &fan5, &flag_data );
log_printf( &logger, " FLAG: %d \r\n", flag_data );
if ( FAN5_F1F_FLAG & flag_data )
{
log_printf( &logger, " FAN SPEED DROPED !!! \r\n" );
log_printf( &logger, " OUTPUT IS DISABLED \r\n" );
fan5_turn_off_fans( &fan5 );
for( ; ; );
}
}
Delay_ms ( 1000 );
Delay_ms ( 1000 );
#else
uint16_t speed;
uint8_t duty_value;
for ( duty_value = FAN5_30_PER_DUTY; duty_value <= FAN5_100_PER_DUTY; duty_value++ )
{
fan5_set_duty_cycle( &fan5, duty_value );
log_printf( &logger, " Duty value: %d \r\n", ( uint16_t ) duty_value );
Delay_ms ( 1000 );
Delay_ms ( 1000 );
Delay_ms ( 1000 );
Delay_ms ( 1000 );
Delay_ms ( 1000 );
fan5_get_rpm1( &fan5, &speed);
log_printf( &logger, " SPEED: %d RPM \r\n", speed );
Delay_ms ( 500 );
}
#endif
}
int main ( void )
{
/* Do not remove this line or clock might not be set correctly. */
#ifdef PREINIT_SUPPORTED
preinit();
#endif
application_init( );
for ( ; ; )
{
application_task( );
}
return 0;
}
// ------------------------------------------------------------------------ END
