Olimex Support Forum

ARM => ST => Topic started by: serwik on June 17, 2020, 05:26:31 am

Title: STM32-E407 not working until JTAG connection
Post by: serwik on June 17, 2020, 05:26:31 am
Hi.
I purchased STM32-E407 board and plugged power supply. The red LED turned on, but the green one remain dark.
After that I connected debugger hardware(ST-LINK/V2), the green LED turned on.
(at that time I didn't launch ST-LINK Utility nor OpenOCD, so ST-LINK didn't communicate with E407.)

I succeeded program LED flash demo (in Olimex ODS E407 sample).
But with E407 itself only, the green LED doesn't flash until debugger connection.
Once connected with debugger, the LED continues flashing after disconnecting debugger.

All jumper settings are default.

Any suggestions or guess?
Thanks in advance.
Title: Re: STM32-E407 not working until JTAG connection
Post by: LubOlimex on June 17, 2020, 08:59:53 am
You need to provide between 6V DC and 16V DC to the power jack AND also set PWR_SEL jumper to position 1-2.