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STM32 Boards

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STM32 Firmware Upgrade Through CANbus

Using the Stitch Bootloader, the current project aims to update a board through CANbus. The workflow: The first board has a firmware loaded into the SD Card. At the beginning it requests to transmit the firmware through CANbus. If the second board accepts the request, then the firmware is transmitted through the CANBus to the SD Card of the client. After the completion of the firmware transfer process, the system reboots itself and Stitch Bootloader flashes…

STM32 Firmware Upgrade

Usually a firmware upgrade of the STM32FXXX boards are is not an easy task for customers. They have to plug the board and use several different tools to flash the memory. For that reason i have made a simple, effective and easy way to upgrade your firmware using an SD Card. The upgrade task is simple, just write your firmware in the first sector of the SD Card, reboot your system, and the bootloader will…

CAN Frames Echoing Thread for STM32F779-Eval board

Sometimes, we need an easy way to test and verify that our board works correctly, especially if we are using breadboards and cables. The following simple FreeRTOS thread is able to echo each incoming CAN frame. To use this thread you must enable FreeRTOS using the ST’s CubeMX software which will generate the appropriate startup source code and afterwards you have to include some extra libraries that can be found in the blog (please check…

CAN frames buffer (received by interrupt) for STM32F779-Eval board

In a previous post we saw a simple CAN library to handle the CAN interfaces of STM32 board. However one basic issue that we had to solve is the frames buffering (especially when we receive the frames). This issue came up by the processing time that each frame needs and the limitation that the receive interrupt routine should be as fast as possible. For that reason, the following source code presents an incoming CAN Frames…

CANBus library for STM32F779-Eval board

The Controller Area Network (CAN, also known as CAN Bus) is a vehicle bus standard designed to allow electronic control units and devices to communicate with each other in applications without a host computer. STM32F779-Eval board has 3 CAN interfaces, however only the two of them have their own clock (master). For that reason the following library provides some C methods to activate and use those CAN interfaces. Beware that each CAN interface requires its…

USARTx DMA ring buffer for STM32F779-Eval board

I have recently been playing with UART and DMA, although i’m still getting my head around it,. DMA allows you to transfer large amounts of data through the system without getting the processor core involved. Rather than the CPU laboriously reading a byte, the writing a byte from one buffer to another, you’d give the DMA controller a pointer to the start of a source buffer, a pointer to the start of the destination buffer,…

Using the SD Card of STM32F779NI-Eval board

Are you in need of an additional memory larger than EEPROM? Although EEPROM is a very easy and effective way of storing data on the board, the built in EEPROM only offers only a few bytes of storage. When working with larger or more advanced projects we may need to store additional data so an external memory solution. For that reason, MicroSD card enables you to do this quickly and easily. The following library provides…