USART problem

[piotr2]

Posted on February 17, 2014 at 14:24

Hi!

I tried to establish USART connection between my STM32F103RB with PC and I cannot do it. I searched many topics and forums and tried different possiblities and nothing worked. I also tried to make a USART connection on my board (between USART1 and USART2) and it worked fine. Unfortunately after rewiring cables to connect USART1 with ZL4USB (this is board with opto-isolation using FT232R) I send and receive some rubbish. I'd be grateful for getting some help. #usart-stm32

[Tesla DeLorean]

Posted on February 23, 2014 at 03:17

While that might be possible, I suspect the reason for it not working is much more mundane.

Off by one, or PA9/PA10 reversed?

[pafshan]

Posted on February 23, 2014 at 04:55 Attached is the schematic of the circuit. I checked the PA9 and PA10 and even exchanged them just to see. But no response from the terminal at all. Many thanks! ________________ Attachments : scan0001.pdf : https://st--c.eu10.content.force.com/sfc/dist/version/download/?oid=00Db0000000YtG6&ids=0680X000006I0bi&d=%2Fa%2F0X0000000bb8%2FirCmfVn6Pyi3UgaEHJalov8Yzt_taZ4XITLeq5FC328&asPdf=false

[Tesla DeLorean]

Posted on February 23, 2014 at 14:38

Ok, reasonable. Is the serial the same arrangement you tested with the VL-Discovery?

[pafshan]

Posted on February 23, 2014 at 18:03

Yes, everything is exactly the same as the VL-discovery except the board.

Any initialization is needed for a brand new chip?