Hello, I canceled the jtag pins in my project. Currently, how can I install the software on the card with the ST's bootloader. How should I go about this?

[DeveloperMan]

no response from the target the bootloader cannot be started.

What is the reason for this error? I make the necessary Usart1 connection. It also goes into boot mode but I keep getting this error.

[Tesla DeLorean]

>> the processor never got up.

I don't even know what that means.

Perhaps BoardDesignGuy can provide some more details about the hardware side of things?

[Tesla DeLorean]

>>What is the reason for this error? 

Stuff in your design isn't working, there is perhaps signalling on other pins described in AN2606 that is occuring before those on USART1. Say a GPS device, or something else, chattering at start up.

I really have no insight into your design/implementation here.

[DeveloperMan]

I tried it with stm32f103rb on the Nucleo board for testing purposes. But I got the same error there. I connected with TTL on Usart1. Still, I did not get any results. I also do the reset. I pulled the boot0 pin to high but the result was the same.

[DeveloperMan]

We solved the problem on the Nucleo board. The Boot1 pin in Nucleo is not the default low. You have to pull it low by yourself. Boot0 pin can also be loaded after the reset by pulling high. Thanks for your help.

[DeveloperMan]

Hello, I have booted with pins (Rx and Tx) that go directly to the processor via usart1 on my control card. However, I have to verify this over the remapped rs-485 line. The rs-485 in between may also affect the hardware. How should I proceed?