#include "stm32f10x.h"

// ###############################################################
    u16 temp=0xAA;
/* Private typedef -----------------------------------------------------------*/
GPIO_InitTypeDef  GPIO_InitStructure;
USART_InitTypeDef USART_InitStructure;
NVIC_InitTypeDef NVIC_InitStructure;

// ###############################################################
// i n t e r r u p t s
// ###############################################################
void USART1_IRQHandler (void)
{
    u32 _val=0xAA;
    if(USART1->SR & USART_SR_RXNE)
    {
        _val=USART1->DR;
    }
}
void ComPortInit(void)
{
    RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA | RCC_APB2Periph_AFIO | RCC_APB2Periph_USART1, ENABLE);
    
    // Tx on PA9 as alternate function push-pull
    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);

    // Rx on PA10 as input floating
    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
    GPIO_Init(GPIOA, &GPIO_InitStructure);

    USART_InitStructure.USART_BaudRate = 9600;
    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_Init(USART1, &USART_InitStructure);

    NVIC_SetVectorTable( NVIC_VectTab_FLASH, 0x08000000 );
    NVIC_PriorityGroupConfig(NVIC_PriorityGroup_0);
      NVIC_InitStructure.NVIC_IRQChannel = USART1_IRQn;
      NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
      NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
      NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
      NVIC_Init(&NVIC_InitStructure);
  
      // Ðàçðåøàåì ïðåðûâàíèÿ ïî ïðèåìó
      USART_ITConfig(USART1, USART_IT_RXNE, ENABLE);
    //  USART_ITConfig(USART1, USART_IT_TXE, ENABLE);

      USART_Cmd(USART1, ENABLE);
}

// ###############################################################
int main(void)
{
    ComPortInit();
//    USART1->DR = 0xAA;

    while (1);
}