Tag:

NUcleo-F334R8

Nucleo F334R8 RGB led example

by shedboy71 30th January 2016

written by shedboy71

This is a basic example with the ST Nucleo F334R8 board, this uses the mbed online compiler.

In this example we flash the red, green and blue colours of an RGB led . Our RGB LED was a common anode type, so a low output switches the LED on and a high output switches the LED off.

Code

[codesyntax lang=”cpp”]

#include "mbed.h"
 
DigitalOut red(D5);
DigitalOut blue(D8);
DigitalOut green(D9);
 
int main() 
{
    while(1) 
    {
        red = 0; //red on
        wait(1.0); // 1 sec
        red = 1; //red off
        green = 0; //green on
        wait(1.0); // 1 sec
        green = 1; //green off
        blue = 0; //blue on
        wait(1.0); // 1 sec
        blue = 1; // blue off
    }
}

[/codesyntax]

Links
Waveshare STM32 Board Nucleo NUCLEO-F334R8 STM32F334R8 STM32 Development Board Integrate ST-LINK/V2-1 Debugger/Programmer Support Arduino

30th January 2016 0 comment

Code

Nucleo F334R8 LCD example

by shedboy71 30th January 2016

written by shedboy71

In this example we will add an Arduino LCD keypad shield to a ST Nucleo F334R8. This is a 16×2 LCD Keypad module for Arduino Diecimila Duemilanove, UNO, MEGA1280, MEGA2.

It consists of a 1602 white character blue backlight LCD. The keypad consists of 5 keys — select, up, right, down and left. To save the digital IO pins, the keypad interface uses only one ADC channel. The key value is read through a 5 stage voltage divider.

Here are the pins and their functions

Pin	Function
Analog 0	Button (select, up, right, down and left)
Digital 4	DB4
Digital 5	DB5
Digital 6	DB6
Digital 7	DB7
Digital 8	RS (Data or Signal Display Selection)
Digital 9	Enable
Digital 10	Backlit Control

Here is a picture of this shield

lcd keypad shield

Code

The code is for the mBed online compiler at https://developer.mbed.org/ and uses the freetronics LCD library

[codesyntax lang=”cpp”]

#include "mbed.h"
#include "freetronicsLCDShield.h"
 
freetronicsLCDShield lcd(D8, D9, D4, D5, D6, D7, D1, A0);

 
int main() 
{
    lcd.cls();
    // print the first line and wait 3 sec
    lcd.printf("LCD test");
    wait(3);
    
    // print the counter prefix; the number will be printed in the while loop
    lcd.setCursorPosition(1, 0);
    lcd.printf("seconds : ");
    
    int i=1;
    while (i++) 
    {
        lcd.setCursorPosition(1, 11);
        lcd.printf("%d", i);
        wait(1);
    }
}

[/codesyntax]

30th January 2016 0 comment

Code

NUCLEO-F334R8 PIR example

by shedboy71 30th January 2016

written by shedboy71

In this example we connect a low cost PIR to our NUCLEO-F334R8 board and if an intruder is detected we will display a message. A passive infrared sensor (PIR sensor) is an electronic sensor that measures infrared (IR) light radiating from objects in its field of view. They are most often used in PIR-based motion detectors.

The most common PIR that is used in many projects looks like this

PIR module

We use a low cost PIR something similar to the following, very common and easy to connect up. Lets take a look at a schematic

Schematic

Nucleo and PIR layout

Code

We need the library for the freetronics LCD shield, I’m using a sainsmart one. There are many clones on the internet. What we are doing is waiting for the PIR to stabilize for 30 seconds, then if anything is detected the PIR output will go high and we will display a message on the LCD, real world could be flashing led’s or a siren of some description like an intruder alarm but the LCD could simulate the status display

[codesyntax lang=”cpp”]

#include "mbed.h"
#include "freetronicsLCDShield.h"


freetronicsLCDShield lcd(D8, D9, D4, D5, D6, D7, D1, A0);

DigitalIn PIRSensor(D3);

int n=0;

int main() 
{
lcd.cls();
//allow 30 seconds for PIR to stabilize
lcd.printf("Stabilizing");
lcd.setCursorPosition(1, 0);
for (n=0; n<30; n++)
{
wait_ms(1000); // 1sec delay
}

//loop constantly
while(1)
{
lcd.cls();
if (PIRSensor == 1)
{ 
lcd.setCursorPosition(1, 0);
lcd.printf("INTRUDER ALERT");
wait(10);
}
}
}

[/codesyntax]

30th January 2016 0 comment

Code

Nucleo-F334 and OLED display

by shedboy71 30th January 2016

written by shedboy71

This is an example of connecting a 128×64 I2C OLED display to a NUCLEO-F334R8.

Vcc – 3.3v
Gnd – Any Gnd
SDA – D14
SCL – D15

here is a picture of the OLED I used, there are many variants of this available

oled 12864 display

Schematics and Layout

nucleo and oled schematic

Now for the breadboard layout

nucleo and breadboard layout

Code

This example requires the Adafruit_Gfx library to be imported into your project. Since this is an I2C display and its a 128×64 I had to modify the rawHeight parameter in the Adafruit_SSD1306.h code as follows

Here is an export of the code and libraries

Nucleo_OLED_zip_nucleo_f334r8

Adafruit_SSD1306_I2c(I2C &i2c, PinName RST, uint8_t i2cAddress = SSD_I2C_ADDRESS, uint8_t rawHeight = 32, uint8_t rawWidth = 128)

Adafruit_SSD1306_I2c(I2C &i2c, PinName RST, uint8_t i2cAddress = SSD_I2C_ADDRESS, uint8_t rawHeight = 64, uint8_t rawWidth = 128)

[codesyntax lang=”cpp”]

#include "mbed.h"
#include "Adafruit_SSD1306.h"

DigitalOut myLed(LED1);
I2C i2c(I2C_SDA, I2C_SCL);

Adafruit_SSD1306_I2c oled (i2c, D4);

int main() 
{
int tickTime = 1000;
oled.begin(SSD1306_SWITCHCAPVCC);
wait_ms(200);
oled.splash();
oled.display();
wait(2);
while(1) 
{
myLed = !myLed;
wait_ms(tickTime);
}
}

[/codesyntax]

You should see the adafruit logo on your display if everything works OK
Links
STM32 Board Nucleo NUCLEO-F334R8 STM32F334R8 STM32 Development Board Integrate ST-LINK/V2-1 Debugger/Programmer Support Arduino

0.96″ Inch Yellow and Blue I2c IIC Serial 128×64 Oled LCD Oled LED Module for Arduino Display 51 Msp420 Stim32 SCR

30th January 2016 0 comment

Hardware

Nucleo-F334R8 board

by shedboy71 30th January 2016

written by shedboy71

The STM32 Nucleo boards allow anyone to try out new ideas and to quickly create prototypes with any STM32 MCU.

STM32 Nucleo boards can easily be extended with a large number of specialized application hardware add ons (Arduino Uno Rev3 and ST morpho connectors on Nucleo-144 and Nucleo-64, ST Zio connectors on Nucleo-144, Arduino Nano connectors on Nucleo-32). The STM32 Nucleo boards integrate an ST-Link debugger/programmer, so there is no need for a separate probe.

All STM32 Nucleo users have free access to the mbed online resources (compiler, C/C++ SDK, and developer community) at www.mbed.org.

At the moment I am using the NUcleo-F334R8, here are some of the features

nucleo f334r8

Features

STM32 microcontroller with LQFP64 package
Two types of extension resources
Arduino Uno Revision 3 connectivity
STMicroelectronics Morpho extension pin headers for full access to all STM32 I/Os
mbed-enabled (http://mbed.org)
On-board ST-LINK/V2-1 debugger/programmer with SWD connector
selection-mode switch to use the kit as a standalone ST-LINK/V2-1
Flexible board power supply
USB VBUS or external source(3.3 V, 5 V, 7 – 12 V)
Power management access point
Three LEDs
USB communication (LD1), user LED (LD2), power LED (LD3)
Two push buttons: USER and RESET
USB re-enumeration capability: three different interfaces supported on USB
Virtual Com port
Mass storage
Debug port
Supported by wide choice of Integrated Development Environments (IDEs) including IAR™, Keil®, GCC-based IDEs

Here is the pinout

xnucleo64_revc_f334r8_mbed_pinout

30th January 2016 0 comment