ChibiOS Free Embedded RTOS

Hi
I have problem with using for using USART2 instead USART1 for log output with chprintf on the Stm32f303discovery board.

I initialise chip:
BaseSequentialStream * chip= (BaseSequentialStream*)&SD2;
I initialise SD2 driver using instruction:
sdStart(&SD2,0);
Then I send information to Uart2 by the instruction;
chprintf(chp,”Main loop\n\r”);

All works without errors.

But when I want to see the output with the view Terminal in Chibios Studio and set serial port to /dev/ttyACM1 or any other, the Terminal view panel is empty.
Where is the problem?
Best Regards
Alexey Gavrilov
P.S. When I use Uart1 , all is good, I can see output information in Terminal view!

Hi,

USART2 is not connected to the debugger on the board, you cannot see it using the virtual com port. USART1 is physically connected to the ST-Link on board.

Giovanni

Hi!
Thank you for quick answer.
But how can I receive data from USART2?
Which connection should I use on PC?
Is USART2 useless?
Best Regards
Alexey Gavrilov

Hi!
I think that my question was silly.
For USART2 I must simply connect PA2 and PA3 pins on Stms32f393 Dicovery board with real external UART cable .
Is it true?
Best Regards
Alexey Gavrilov

Yes, make sure to program correct GPIO alternate functions too.

There are also very cheap USB-uart adapters you could use.

Giovanni