= stm32sprog =
stm32sprog is an in-system programming (ISP) utility for STM32
microcontrollers. It relies on the STM32's built-in bootloader.
All STM32 microcontrollers have a built-in bootloader that can be used for ISP.
To activate it, pull the BOOT0 and BOOT1 pins high and low respectively, and
perform a reset. The bootloader supports connections to USART1 on all devices.
Some devices also support connections to USART2. See ST application notes
AN2606 and AN3155 for details.
stm32sprog requires a serial connection to the target device's USART. A simple
option is to use a USB-to-USART converter. If the serial hardware supports
modem control signals, the DTR signal can be used to automatically reset the
target device.
### Connection Diagram ###
Host Serial Target STM32
,,,,____ ____,,,,
| |
| |
Tx |>--------------<| USART1 Rx
| |
Rx |>--------------<| USART1 Tx
| |
| |
| (optional) |
DTR |>--------------<| NRST
| |
| |
,,,,____| |____,,,,