Uchi Embedded Solutions

In this article, I will show how I analyse I2C communication using a Saleae logic analyzer. This tutorial explains the basic setup, how to capture signals, how to enable the I2C protocol analyzer, and how to understand the decoded data. The same method can be used when debugging communication between a microcontroller and peripheral devices such as sensors, EEPROM, or display controllers.   I2C is one of the most used serial communication protocols in embedded systems. It uses two signals,...

Understanding STM32H503 and Its Security Features The STM32H503 family from STMicroelectronics is built on the ARM Cortex-M33 core. It includes an advanced security lifecycle as part of the STM32H5 architecture. Unlike older STM32 series, STM32H5 devices support controlled product states. This allows a device to be provisioned, secured, locked, and later reopened through an authenticated regression process. This mechanism is essential for secure production environments where firmware, keys,...

The Local Interconnect Network (LIN) uses a master-slave architecture consisting of one LIN master and one or more LIN slave nodes. Communication begins with a message header, which includes a break field to indicate the start of the frame and a sync field that allows slave nodes to synchronize their clocks. The identifier (ID) field contains a 6-bit message ID along with a 2-bit parity field. This identifier defines the type of message rather than the destination node. Once the ID is...