void initLin(void){
    GPIO_InitTypeDef GPIO_InitStructure;
    USART_InitTypeDef USART_InitStructure;
    RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1, ENABLE);
    RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOA, ENABLE);
    GPIO_PinAFConfig(GPIOA,GPIO_PinSource9,GPIO_AF_1);
    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_Level_3;
    GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
    GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;
    GPIO_Init(GPIOA, &GPIO_InitStructure);
    USART_InitStructure.USART_BaudRate = 19200;
    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_Init(USART1, &USART_InitStructure);
    USART_LINCmd(USART1, ENABLE);
    while (USART_GetFlagStatus(USART_LIN, USART_FLAG_TC) == RESET);
    USART_SendData(USART_LIN,0xFF);
//    USART_Cmd(USART1,ENABLE);
}

int main(void){
    Begin_config();
    Led_config();
    initLin();
    initADC();
    ADC_StartOfConversion(ADC1);
    initLcd();
    setColor(0xFFFF);
    setBGcolor(0);
    fillScreen();
    setFont(f6x8);
    drawString(0,0,"init I2C SPI");
    drawHex4(14,0,123);
    drawDecimal5(20,0,34533);
    i=0;
    while(1){
        GPIOC->ODR ^= GPIO_Pin_9;
        while (USART_GetFlagStatus(USART_LIN, USART_FLAG_TC) == RESET) drawHex4(0,4,USART_LIN->ISR);
        USART_RequestCmd(USART_LIN, USART_Request_SBKRQ, ENABLE);

виснет здесь, точнее бесконечно выполняется цикл ниже.

        while (USART_GetFlagStatus(USART_LIN, USART_FLAG_SBK) == RESET)  drawHex4(5,4,USART_LIN->ISR);
        USART_SendData(USART_LIN,0x55);
        while (USART_GetFlagStatus(USART_LIN, USART_FLAG_TC) == RESET) drawHex4(10,4,USART_LIN->ISR);
        USART_SendData(USART_LIN,0x55);
        while (USART_GetFlagStatus(USART_LIN, USART_FLAG_TC) == RESET) drawHex4(15,4,USART_LIN->ISR);
        USART_SendData(USART_LIN,0x55);
        while (USART_GetFlagStatus(USART_LIN, USART_FLAG_TC) == RESET) drawHex4(20,4,USART_LIN->ISR);
        USART_SendData(USART_LIN,0x55);
        while (USART_GetFlagStatus(USART_LIN, USART_FLAG_TC) == RESET);
        USART_SendData(USART_LIN,0x55);
        while (USART_GetFlagStatus(USART_LIN, USART_FLAG_TC) == RESET);
        USART_SendData(USART_LIN,0x55);
        while ((ADC1->ISR & ADC_ISR_EOC)==0);
        drawDecimal5(0,1,ADC1->DR);
        i++;
        if (i>20){
            i=0;
            GPIOC->ODR ^= GPIO_Pin_8;
        }
    }
}