Bootloader on UART1

[snehadakhare01]

Hi St-family

I'm encountering a problem transferring a bin file via UART on my Stm32f103c8t6. While UART3 functions correctly with a USB TTL converter, UART1 doesn't seem to establish a connection.

• I've verified the connections between the device's UART1 pins (TX and RX) and the USB TTL converter.
• I'm using the appropriate baud rate settings on both the device and the terminal software.

[Imen.D · Accepted solution]

Hello @snehadakhare01 ,

Make sure that BOOT0 is High.

Check that you are properly connecting the pins supported by the bootloader, as described in AN2606 STM32 microcontroller system memory boot mode - Application note.

This video "STM32 boot and startup tips - 2 Embedded bootloader investigations" described some aspects related to the boot process and bootloader management.

[snehadakhare01]

Hi @Imen.D 

Bootloader status was set like this

When TTL Rx and TX are connect to PA9 and PA10 (UART3) it is working 
But I  want to connect TX and RX to PB6 and PB7(UART1) of Bluepill that time it is showing error

Connection

TTL	Bluepill
TX	PB7(Rx)
RX	PB6(Tx)
VCC=3.3	VCC=3.3
GND	GND