/********************************** (C) COPYRIGHT *******************************
 * File Name          : hw_config.c
 * Author             : WCH
 * Version            : V1.0.0
 * Date               : 2021/08/08
 * Description        : USB configuration file.
*********************************************************************************
* Copyright (c) 2021 Nanjing Qinheng Microelectronics Co., Ltd.
* Attention: This software (modified or not) and binary are used for 
* microcontroller manufactured by Nanjing Qinheng Microelectronics.
*******************************************************************************/ 
#include "hw_config.h"

#include <string.h>
#include <stdarg.h>
#include <stdio.h>

#include "../driver/inc/usb_lib.h"

#include "usb_desc.h"
#include "usb_istr.h"
#include "usb_prop.h"
#include "usb_pwr.h"



void USBWakeUp_IRQHandler(void) __attribute__((interrupt("WCH-Interrupt-fast")));
void USB_LP_CAN1_RX0_IRQHandler(void) __attribute__((interrupt("WCH-Interrupt-fast")));



/*******************************************************************************
 * @fn        USBWakeUp_IRQHandler
 *
 * @brief     This function handles USB wake up exception.
 *
 * @return    None
 */
void USBWakeUp_IRQHandler(void) 
{
	EXTI_ClearITPendingBit(EXTI_Line18);
} 

/*******************************************************************************
 * @fn           USB_LP_CAN1_RX0_IRQHandler
 *
 * @brief        This function handles USB exception.
 *
 * @return None
 */
void USB_LP_CAN1_RX0_IRQHandler(void) 
{
	USB_Istr();
} 

/*******************************************************************************
 * @fn        Set_USBConfig
 *
 * @brief     Set_USBConfig .
 *
 * @return    None
 */
void usb_conf_clksource(void)
{
    switch (SystemCoreClock) {
        case 144000000: RCC_USBCLKConfig( RCC_USBCLKSource_PLLCLK_Div3 ); break;
        case 96000000:  RCC_USBCLKConfig( RCC_USBCLKSource_PLLCLK_Div2 ); break;
        case 48000000:  RCC_USBCLKConfig( RCC_USBCLKSource_PLLCLK_Div1 ); break;
    }

	RCC_APB1PeriphClockCmd(RCC_APB1Periph_USB, ENABLE);	 		 
}

/*******************************************************************************
 * @fn        Enter_LowPowerMode
 *
 * @brief     Enter low power mode.
 *
 * @return    None
 */
void Enter_LowPowerMode(void)
{  
 	printf("usb enter low power mode\r\n");
	bDeviceState = SUSPENDED;
} 

/*******************************************************************************
 * @fn         Leave_LowPowerMode
 *
 * @brief      Leave low power mode.
 *
 * @return     None
 */
void Leave_LowPowerMode(void)
{
	DEVICE_INFO *pInfo = &Device_Info;
	printf("usb leave low power mode\r\n"); 
	if (pInfo->Current_Configuration != 0)
	    bDeviceState = CONFIGURED;
	else
        bDeviceState = ATTACHED;
} 

/*******************************************************************************
 * @fn         USB_Interrupts_Config
 *
 * @brief      Configrate USB interrupt.
 *
 * @return     None
 */
void usb_intr_init(void)
{ 
	NVIC_InitTypeDef NVIC_InitStructure;
	EXTI_InitTypeDef EXTI_InitStructure;

	EXTI_ClearITPendingBit(EXTI_Line18);
	EXTI_InitStructure.EXTI_Line = EXTI_Line18; 
	EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;
	EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Rising_Falling;	
	EXTI_InitStructure.EXTI_LineCmd = ENABLE;
	EXTI_Init(&EXTI_InitStructure); 	 

	NVIC_InitStructure.NVIC_IRQChannel = USB_LP_CAN1_RX0_IRQn;	
	NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1;
	NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
	NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
	NVIC_Init(&NVIC_InitStructure);
	
	NVIC_InitStructure.NVIC_IRQChannel = USBWakeUp_IRQn;  
	NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
	NVIC_Init(&NVIC_InitStructure);   
}	

/*******************************************************************************
 * @fn         USB_Port_Set
 *
 * @brief      Set USB IO port.
 *
 * @param      NewState: DISABLE or ENABLE.
 *             Pin_In_IPU: Enables or Disables intenal pull-up resistance.
 *
 * @return     None
 */
void USB_Port_Set(FunctionalState NewState, FunctionalState Pin_In_IPU)
{
	RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE);

	if (NewState) {
		_SetCNTR(_GetCNTR()&(~(1<<1)));
		GPIOA->CFGHR&=0XFFF00FFF;
		GPIOA->OUTDR&=~(3<<11);	//PA11/12=0
		GPIOA->CFGHR|=0X00044000; //float
	} else {
		_SetCNTR(_GetCNTR()|(1<<1));  
		GPIOA->CFGHR&=0XFFF00FFF;
		GPIOA->OUTDR&=~(3<<11);	//PA11/12=0
		GPIOA->CFGHR|=0X00033000;	// LOW
	}
	
	if(Pin_In_IPU) (EXTEN->EXTEN_CTR) |= EXTEN_USBD_PU_EN; 
	else (EXTEN->EXTEN_CTR) &= ~EXTEN_USBD_PU_EN;
}