RS232 with Discovery: parts needed

You need something like this, which does CMOS SERIAL, not RS232

It base on FT232R, which converts RS232 to USB, PL-2303 do the same. Why I need exactly FT232R ?

http://are.net.pl/?id=products&cmd=9&pid=32

''there is no documentation''

http://www.ftdichip.com/Products/Cables/USBTTLSerial.htm

Finally I bought

http://gostmblogspot.com/2010/09/getting-voltages-right.html

#include ''stm32F10x.h''

#include ''STM32vldiscovery.h''




GPIO_InitTypeDef GPIO_InitStructure;

USART_InitTypeDef USART_InitStructure;



u8 USART_data;


int
main(
void
)

{

RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1 | RCC_APB2Periph_GPIOA, ENABLE);



//A.9 USART_1 TX

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9;

GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;

GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;

GPIO_Init(GPIOA, &GPIO_InitStructure);


//A.10 USART_1 RX

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10;

GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;

GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;

GPIO_Init(GPIOA, &GPIO_InitStructure);


USART_InitStructure.USART_BaudRate = 57600; 

USART_InitStructure.USART_WordLength = USART_WordLength_8b;

USART_InitStructure.USART_StopBits = USART_StopBits_1;

USART_InitStructure.USART_Parity = USART_Parity_No;

USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;

USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;


//USART_ITConfig(USART1, USART_IT_RXNE, ENABLE);

USART_Init(USART1, &USART_InitStructure);

USART_Cmd(USART1, ENABLE);


while
(1)

{

while
(USART_GetFlagStatus(USART1, USART_FLAG_TXE)== RESET)

{

}

USART_SendData(USART1, USART_data);

USART_ClearFlag(USART1, USART_FLAG_TXE);



while
(USART_GetFlagStatus(USART1, USART_FLAG_RXNE) == RESET)

{

}

USART_data = USART_ReceiveData(USART1); 

USART_ClearFlag(USART1, USART_FLAG_RXNE); 

}

}

Hello!