void USBLIB_Init(void)
{
    NVIC_DisableIRQ(USB_LP_CAN1_RX0_IRQn);
    RCC->APB1ENR = RCC_APB1ENR_USBEN;

    USB->CNTR   = USB_CNTR_FRES; /* Force USB Reset */
    USB->BTABLE = 0;
    USB->DADDR  = 0;
    USB->ISTR   = 0;
    USB->CNTR   = USB_CNTR_RESETM;
    NVIC_EnableIRQ(USB_LP_CAN1_RX0_IRQn);
}

#include "stm32f10x.h"
#include "usblib.h"

USBLIB_WByte _LineState;

int main(void)
{

    /* ============ 48 MHz ============= */
    RCC->CFGR &= ~RCC_CFGR_SW; // Change System Clock to HSI
    while ((RCC->CFGR & RCC_CFGR_SWS) != 0x00) {
        __NOP();
    };
    RCC->CR &= ~RCC_CR_PLLON; // Disable Pll
    while ((RCC->CR & RCC_CR_PLLON)) {
        __NOP();
    };
    RCC->CFGR &= ~0x3C0000;
    RCC->CFGR |= RCC_CFGR_PLLMULL9; // 6
    /*тута можно поиграться чтоб на усб 48 МГц а клок 72МГц*/
  //  RCC->CFGR |= RCC_CFGR_USBPRE;
    RCC->CFGR |= RCC_CFGR_PLLSRC;
    RCC->CR |= RCC_CR_PLLON;
    while (!(RCC->CR & RCC_CR_PLLON)) {
        __NOP();
    };
    RCC->CFGR |= RCC_CFGR_SW_1; // Change System Clock to PLL
    while ((RCC->CFGR & RCC_CFGR_SWS) != RCC_CFGR_SWS_1) {
        __NOP();
    };

    RCC->APB2ENR |= RCC_APB2ENR_IOPAEN | RCC_APB2ENR_IOPBEN | RCC_APB2ENR_AFIOEN| RCC_APB2ENR_IOPCEN;
    /* ========= PB13 USB CONNECT ========= */
    /* PC13 - LED. Output PP */
    GPIOC->CRH |= GPIO_CRH_MODE13_0;
    GPIOC->CRH &= ~GPIO_CRH_CNF13;

    /* PA15 - USB EN. Output PP */
    GPIOB->CRH |= GPIO_CRH_MODE13_0;
    GPIOB->CRH &= ~GPIO_CRH_CNF13;
    GPIOC->BSRR = GPIO_BSRR_BS13;
    
    GPIOB->BSRR = GPIO_BSRR_BR13;//LOW
    for (int i = 0; i < 1000000; i++) {
        __NOP();
    };

    USBLIB_Init();
    GPIOB->BSRR = GPIO_BSRR_BS13;//UP
    while (1) {};
}

void uUSBLIB_DataReceivedHandler(uint16_t *Data, uint16_t Length)
{
	uint16_t i=0;
	uint16_t ii=Length;
	uint16_t bf=0;
	char RxBuff[64]={0};
	while(ii){
    bf = *Data;
    RxBuff[i++] = *Data++;
    RxBuff[i++] = bf>>8;
    ii--;    
	}
	if((RxBuff[0]=='x')&&(RxBuff[1]=='x')&&(RxBuff[2]=='x')){
    USBLIB_Transmit((uint16_t *)"Welcome to the club!\r\n", 22);
    GPIOC->BSRR = GPIO_BSRR_BR13;
    for (int i = 0; i < 1000000; i++) {
        __NOP();
    };
	}
	else{
    USBLIB_Transmit((uint16_t *)"Bye bye!\r\n", 10);
    for (int i = 0; i < 1000000; i++) {
        __NOP();
    };
    GPIOC->BSRR = GPIO_BSRR_BS13;
	}
	USBLIB_Transmit((uint16_t *)&RxBuff[0], Length);
}

void uUSBLIB_LineStateHandler(USBLIB_WByte LineState)
{
    if (LineState.L) {      //App connected to the virtual port
        _LineState = LineState;
    }
}