STM32 MCUs Products

UART DMA TX

Hi there !Is the first time i wrote at this forum. I start to work with UART and DMA ,and i configurate the buffer in circular mode. I don't understa why when i call the library he continus to send over and over all i have in the buffer , i appearanc...

Specifying the Interrupt priority.

Hi every body. I want to manage two events with general purpose timers 16 and 3. As a convention in ARM processors, as much as I know, the lower interrupt number corresponds to the higher priority. So I think I need to manage event with higher priori...

STM32H743 AXI QOS

Hi,In RM0433 Reference Manual there is a description of the AXIM indicating the possibility to change the QoS for the AXI switch matrix, but cannot find the reference for the indexes used in AXI_INIx_READ_QOS or AXI_INIx_WRITE_QOS.If there any manual...

transmission and reception problems with stm32f103c8 with nrf24 library

hello, i am developing my project in a stm32f103c8 (bluepill) with Keil and CubeMX, i want to use a nrf24l01 transmitter and for this i looked for a tutorial which is exactly what i want to do. the problem is that when i do it i notice that the radio...

Why do I need USART RXNE interrupt enabled in order to make DMA USART RX transfers work?

I want to use DMA1_Stream5, Channel 4 to receive variable length packets on USART2. the first 3 bytes of each packet contain a protocol ID, a packet type and packet length. I initially set the RXNE interrupt enabled so I can interpret and decode thos...

how do I order samples from ST store

I am having an issue doing the firmware update by OTA with my own code in BlueNRG-LP using Steval-IDB011V1 and BlueNRG-GUI app.

If I use the example BLE_Sensor_Demo + OTA_Reset_Manager I can update the firmware without any problem. I have followed the indications given in The BlueNRG-LP (over-the-air) firmware upgrade document (AN5463) and I don’t see any difference between m...