About PhilSter

PhilSter · 2020-05-12

Hi, I am making a custom PCB. I am able to reliably flash it with a ST-Link and a Segger programmer. I also have a custom program that I use to flash the MCU using the UART. It has worked for years with other ST chips and partially worked with th...

PhilSter · 2019-11-21

I got everything working but it turns out that there is an undocumented feature with the RTS line. Even after I bypassed the HW bug with the CAN peripheral (that was documented in your errata sheet), it still would not raise the RTS line when its RD...

PhilSter · 2020-05-13

Yes, I tried power cycling it once, and my PCB was designed to use the USART1 which I believe is the only interface supported by the STM32F103. Jegermeister is my affectionate name for my favorite programmer, the Seger J-link and my favorite schnapp...

PhilSter · 2020-05-13

I checked it with a digital oscilloscope, and there was no noise and the switch shorted nRST to 0V. Also the reset net is only connected to the cap, pullup, switch, and a male header for the programmer(not connected during testing) and is surrounded...

PhilSter · 2019-11-22

First thing I do is check for shorted circuit traces and then I toggled the output as a GPIO because I don't trust my hand assembled prototype PCBs at all. It worked fine. I wasted many hours before I learned about the USART1 RTS / CAN defect, and ...

PhilSter · 2019-11-22

JW, I'm an old school bit hacker and I program the peripherals directly using the reference manual. But you got me interested so I ran some more tests:PA12 AF OD Works with the pull up resistor: GPIOA_CRH : 400e44b2PA12 AF PP Works with the pull u...

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STM32F103CB not entering the bootloader...

I am developing a product that uses an STM32F103. I spent the last two days debugging the USART1 port due to multiple issues with the controlling SBC and the ARM GNU stdio lib.

Re: STM32F103CB not entering the bootloader...

Re: STM32F103CB not entering the bootloader...

Re: I am developing a product that uses an STM32F103. I spent the last two days debugging the USART1 port due to multiple issues with the controlling SBC and the ARM GNU stdio lib.

Re: I am developing a product that uses an STM32F103. I spent the last two days debugging the USART1 port due to multiple issues with the controlling SBC and the ARM GNU stdio lib.