Writing 0 into the appropriate bit will drive the I/O pin low. If a pin is set to output (in the MODER register) then writing a 1 into the appropriate bit will drive the I/O pin high. In the Output Data Register (ODR) each bit represents an I/O pin on the port. So, for example, to configure pin 8 for output, we must write the value 01 into bits 16 and 17 in the MODER register (that is, bit 16 => 1, bit 17 => 0). 10 Alternative function (details configured via other registers).Output Data Register – Writing a ‘ 1‘ to the appropriate pin will generate voltage and writing a ‘ 0‘ will ground the pin.Įach port pin has four modes of operation, thus requiring two configuration bits per pin (pin 0 is configured using mode bits 0-1, pin 2 uses mode bits 2-3, and so on):.
we want this pin to behave as an output pin. Mode Register – this defines, on a pin-by-pin basis what its function is, e.g.The LEDS are mapped to external pins 55-58 which maps internally onto GPIO Port D pins 8-11.įlashing the LEDs is fairly straightforward, at the port level there are only two registers we are interested in. The STM32F4 uses a port-based GPIO (General Purpose Input Output) model, where each port can manage 16 physical pins. The examples are based on a STM32F407 chip using the GNU Arm Embedded Toolchain. These can be found for free in your Apps store.We all know the embedded equivalent of the “Hello, world!” program is flashing the LED, so true to form I’m going to use that as an example. However, if you have an older version phone or an Android, you might want to download a QR Code Reader App.
If you have a newer phone or iPhone, all you will need to do to scan the QR Code is open your camera and hold it over the QR Code until a pop-up appears. Again, be prepared and make your TECPDS account prior to attending the event. Whether the event is online or in person, a trainer may have a QR Code for you to scan. Using a phone or a tablet – Many people now attend trainings online with their phones or tablets. You may also scan the QR Code with your phone, which we will discuss next. (add a link to the account creation HTG).
If you do not yet have an account, we highly suggest you create an account prior to the event. This is simple to use and will direct you to TECPDS to log into your account or create an account. Using a computer – When using your computer, you have a choice of clicking on the link the trainer gives you in the chatbox.
What can you do to prepare for an event or conference? During this time of virtual events, it depends on whether you will be watching on your phone or tablet or if you will be on a computer.
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