Elevate your equipment's comfort with EMC2103 and STM32F091RC
Quietly efficient, delightfully cool
Published Feb 26, 2024
Click board™
Fan 6 Click
Dev Board
Nucleo-64 with STM32F091RC MCU
Compiler
NECTO Studio
MCU
STM32F091RC
Take charge of your comfort with our fan speed management system, allowing you to adjust fan speeds for a personalized cooling experience easily
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Hardware Overview
How does it work?
Fan 6 Click is based on the EMC2103, an SMBus-compliant fan controller with up to 3 external and one internal temperature channel from Microchip. It allows the user to program temperatures generated from external sources to control the fan speed. This functionality also supports DTS data from the CPU. By pushing DTS or standard temperature values into dedicated registers, the external temperature readings can be used with the external diode(s) and internal diode to control the fan speed. The EMC2103 from Microchip also includes a hardware programmable temperature limit and dedicated system shutdown output for thermal protection of critical circuitry. The EMC2103 supports a high or low-frequency PWM driver. The output can be configured as either push-pull or open drain, and the frequency ranges from 9.5Hz to 26kHz in four programmable frequency bands. The EMC2103 includes an RPM-based Fan Speed Control Algorithm. This fan control algorithm uses Proportional, Integral, and Derivative terms to automatically approach and
maintain the system's desired fan speed to an accuracy directly proportional to the accuracy of the clock source. The EMC2103 supports DTS (Intel's Digital Temperature Sensor) data in the Fan Control Look-Up Table. Intel's DTS data is a positive number representing the processor's relative temperature below a fixed value called TCONTROL, which generally equals 100°C for Intel Mobile processors. For example, a DTS value of 10°C means the actual processor temperature is 10°C below TCONTROL or equal to 90°C. The EMC2103's RPM-based Fan Speed Control Algorithm has programmable configuration settings for parameters such as ramp-rate control and spin-up conditions. The fan driver automatically detects and attempts to alleviate a stalled/stuck fan condition while also asserting the ALR pin. The tachometer measurement circuitry is used in conjunction with the RPM-based Fan Speed Control Algorithm to update the fan driver output. Additionally, it can be used in Direct Setting mode as a diagnostic for host-based fan
control. This method monitors the TACH signal in real-time. It constantly updates the tachometer measurement by reporting the number of clocks between a user's programmed number of edges on the TACH signal. The External Diode 1 channel can support a diode-connected transistor (such as a 2N3904) or a substrate transistor requiring the BJT or transistor model (such as those found in a CPU or GPU). The External Diode 2 channel supports any diode connection or can be configured to operate in an anti-parallel diode (APD) mode. The MIC2253 is a constant frequency, pulse-width modulated (PWM) peak current-mode step-up regulator. A reference voltage is fed into the PWM engine, where the duty cycle output of the constant frequency PWM engine is computed from the error, or difference, between the REF and FB voltages. The PWM engine encompasses the circuit blocks to implement a current-mode boost switching power supply, allowing Fan 6 click to drive a 12V fan.
Features overview
Development board
Nucleo-64 with STM32F091RC 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)
256
Silicon Vendor
STMicroelectronics
Pin count
64
RAM (Bytes)
32768
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
Schematic
Step by step
Project assembly
Start by selecting your development board and Click board™. Begin with the Nucleo-64 with STM32F091RC MCU as your development board.
Track your results in real time
Application Output via Debug Mode
1. Once the code example is loaded, pressing the "DEBUG" button initiates the build process, programs it on the created setup, and enters Debug mode.
2. After the programming is completed, a header with buttons for various actions within the IDE becomes visible. Clicking the green "PLAY" button starts reading the results achieved with the Click board™. The achieved results are displayed in the Application Output tab.
Software Support
Library Description
This library contains API for Fan 6 Click driver.
Key functions:
fan6_read_eeprom- This function reads 256 bytes from EEPROMfan6_set_pwm_mode- This function sets Fan on PWM mode and determines Fan speed (PWM duty)fan6_read_tachometer- This function reads current tachometer value and calculates that value in rpm
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
* \brief Fan6 Click example
*
* # Description
* This demo application reads tachometer value which is calculated as rpm value, and reads
* temperature of external diode in celsius value.
*
* The demo application is composed of two sections :
*
* ## Application Init
* Initializes device configuration.
*
* ## Application Task
* Reads tachometer value which is calculated as rpm value, and reads
* temperature of external diode in celsius value. All this results logs on USB UART. Repeats operation
* every 500 ms.
*
* \author MikroE Team
*
*/
// ------------------------------------------------------------------- INCLUDES
#include "board.h"
#include "log.h"
#include "fan6.h"
// ------------------------------------------------------------------ VARIABLES
static fan6_t fan6;
static log_t logger;
static uint32_t tachometer;
static uint8_t duty_cycle = 0;
// ------------------------------------------------------ APPLICATION FUNCTIONS
void application_init ( void )
{
log_cfg_t log_cfg;
fan6_cfg_t cfg;
/**
* 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.
fan6_cfg_setup( &cfg );
FAN6_MAP_MIKROBUS( cfg, MIKROBUS_1 );
fan6_init( &fan6, &cfg );
fan6_enable_device( &fan6, 1 );
Delay_ms( 500 );
fan6_default_cfg( &fan6 );
tachometer = 0;
}
void application_task ( void )
{
float temp_diode;
temp_diode = fan6_get_temperature( &fan6, FAN6_INTERNAL_TEMP_READ_REG );
log_printf( &logger, "Temperature of DIODE is: %f - Cels \r\n", temp_diode );
fan6_set_pwm_mode( &fan6, duty_cycle );
duty_cycle += 5;
tachometer = fan6_read_tachometer( &fan6 );
log_printf( &logger, "Tachometer value is: %lu rpm \r\n", tachometer );
log_printf( &logger, "---------------------------------------- \r\n", tachometer );
Delay_ms( 500 );
}
void main ( void )
{
application_init( );
for ( ; ; )
{
application_task( );
}
}
// ------------------------------------------------------------------------ END
