Programmer NyamFlashLoader for STM32
NyamFlashLoader is a simple Windows program that allows you to flash STM32 microcontrollers via UART port.
NyamFlashLoader uses the DTR and RTS pins of the COM port to automatically activate the built-in bootloader and reboot the microcontroller. The connection diagram is shown in the program.
You only need a USB-UART adapter to download programs via the built-in STM32 bootloader. Here is a selection of USB-UART converters with DTR and RTS pins. The program also has a manual bootloader activation mode.
NyamFlashLoader works at baudrate 115200. It is very slow. If you need more speed, you should buy ST-Link programmer.
Watch YouTube video below for details:
Download NyamFlashLoader STM32
The program does not require installation, just download and run the EXE file:
NyamFlashLoaderSTM32.exe (EXE, 2.5 MB)