how can connected STM32F407 with PC ? how can used UART port correctly ?

[alouni bargougui]

please i need some help 

i used UART to communicate stm32f407vg tx dicovery

[Tesla DeLorean]

USART1 PA9/PA10 is not viable due to a capacitor on one of the lines.

Use USART6 PC6/PC7

The USART signals at CMOS levels, this is not compatible with RS232, you will need a MAX3232 type device to shift levels if using RS232 connectivity.

You may use a USB-to-CMOS Serial adapter/dongle, FTDI or SiLabs type chips.

[alouni bargougui]

thank you Clive Two.Zero

i used usb ttc adaptator

i need to use TIM or not ?

[Tesla DeLorean]

The USART peripheral functions independently of the TIM and other peripherals. Your library may established other requirements for timeouts etc, ie HAL with SysTick