[Revised] Emulating UART Part 2: Receiving Data
In Part 2 we pushed bytes out onto the wire; in Part 3 we turn the same timer interrupt around and listen. We will detect the start bit, sample each…
Embedded systems engineering
Firmware, hardware and the details that make them work. Tutorials from the EmbeddedExpertIO engineering community.
Getting Started with STM32 Low Layer (LL): PWM DMA
This guide walks through configuring an STM32F4 timer in PWM mode with DMA-driven duty cycle updates, using the STM32CubeMX-generated initialization and STM32 LL drivers…
[Revised] Emulating UART Part 2: Sending Data
In Part 1 we configured the timer and the transmit pin; in Part 2 we put that time base to work and actually send…
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Getting Started with STM32 Low Layer (LL): Analog to Digital Converter Multi Channel Timer Triggered with DMA
To achieve precise, deterministic sampling rates essential for digital signal processing and control systems, this guide explores using a hardware timer to trigger the…
Getting Started with STM32 Low Layer (LL): SPI Reception in Polling Mod
Unlike UART or I2C, an SPI master never simply listens: clocks only run while the master transmits, so every read is inherently a simultaneous…
Getting Started with STM32 Low Layer (LL): Output Compare
Until now, the timer has only known how to repeat — PWM painting the same waveform over and over, forever. Output Compare is the…
[Revised]Emulating UART Part 1: Introduction and environment Setup
In this new series guide, we shall emulate the UART hardware using a clever combination of timers and DMA to achieve effortless, CPU-independent serial…
Getting Started with STM32 Low Layer (LL): PWM Generation
In Part 1, we used a timer to measure time; now we’ll put it to work generating signals instead. In this part, we configure…
Getting Started with BLE on the STM32WB55: Part 3
In Part 3 of our series, we will configure GATT Services and Characteristics on the STM32WB55 to establish two-way data communication with your smartphone.…
UART Based Sensor Emulation Part 3: Developing the Communication Protocol
This guide walks through building a lightweight, framed UART protocol for emulating a sensor, covering the frame layout, parser design, and error handling needed…