/**
  ******************************************************************************
  * @file    hw_config.c
  * @author  MCD Application Team
  * @version V3.4.0
  * @date    29-June-2012
  * @brief   Hardware Configuration & Setup
  ******************************************************************************
  * @attention
  *
  * <h2><center>&copy; COPYRIGHT 2012 STMicroelectronics</center></h2>
  *
  * Licensed under MCD-ST Liberty SW License Agreement V2, (the "License");
  * You may not use this file except in compliance with the License.
  * You may obtain a copy of the License at:
  *
  *        http://www.st.com/software_license_agreement_liberty_v2
  *
  * Unless required by applicable law or agreed to in writing, software 
  * distributed under the License is distributed on an "AS IS" BASIS, 
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  * See the License for the specific language governing permissions and
  * limitations under the License.
  *
  ******************************************************************************
  */


/* Includes ------------------------------------------------------------------*/

#include "stm32_it.h"
#include "usb_lib.h"
#include "usb_prop.h"
#include "usb_desc.h"
#include "hw_config.h"
#include "usb_pwr.h"


/* Private typedef -----------------------------------------------------------*/
/* Private define ------------------------------------------------------------*/
/* Private macro -------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/
ErrorStatus HSEStartUpStatus;
USART_InitTypeDef USART_InitStructure;

uint8_t  USART_Rx_Buffer [USART_RX_DATA_SIZE]; 
uint32_t USART_Rx_ptr_in = 0;
uint32_t USART_Rx_ptr_out = 0;
uint32_t USART_Rx_length  = 0;

uint8_t  USB_Tx_State = 0;
static void IntToUnicode (uint32_t value , uint8_t *pbuf , uint8_t len);
/* Extern variables ----------------------------------------------------------*/

extern LINE_CODING linecoding;

/* Private function prototypes -----------------------------------------------*/
/* Private functions ---------------------------------------------------------*/
/*******************************************************************************
* Function Name  : Set_System
* Description    : Configures Main system clocks & power
* Input          : None.
* Return         : None.
*******************************************************************************/
void Set_System(void)
{
#if !defined(STM32F10X_CL) && !defined(STM32L1XX_MD) && !defined(STM32L1XX_HD) && !defined(STM32L1XX_MD_PLUS)
  GPIO_InitTypeDef GPIO_InitStructure;
#endif /* STM32F10X_CL && STM32L1XX_XD */  

#if defined(USB_USE_EXTERNAL_PULLUP)
  GPIO_InitTypeDef  GPIO_InitStructure;
#endif /* USB_USE_EXTERNAL_PULLUP */ 
  
  /*!< At this stage the microcontroller clock setting is already configured, 
       this is done through SystemInit() function which is called from startup
       file (startup_stm32f10x_xx.s) before to branch to application main.
       To reconfigure the default setting of SystemInit() function, refer to
       system_stm32f10x.c file
     */   
#if defined(STM32L1XX_MD) || defined(STM32L1XX_HD)|| defined(STM32L1XX_MD_PLUS)
  /* Enable the SYSCFG module clock */
  RCC_APB2PeriphClockCmd(RCC_APB2Periph_SYSCFG, ENABLE);
#endif /* STM32L1XX_XD */ 
   
#if !defined(STM32F10X_CL) && !defined(STM32L1XX_MD) && !defined(STM32L1XX_HD) && !defined(STM32L1XX_MD_PLUS)
  /* Enable USB_DISCONNECT GPIO clock */
  RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIO_DISCONNECT, ENABLE);

  /* Configure USB pull-up pin */
  GPIO_InitStructure.GPIO_Pin = USB_DISCONNECT_PIN;
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_OD;
  GPIO_Init(USB_DISCONNECT, &GPIO_InitStructure);
#endif /* STM32F10X_CL && STM32L1XX_XD */
   
#if defined(USB_USE_EXTERNAL_PULLUP)
  /* Enable the USB disconnect GPIO clock */
  RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIO_DISCONNECT, ENABLE);

  /* USB_DISCONNECT used as USB pull-up */
  GPIO_InitStructure.GPIO_Pin = USB_DISCONNECT_PIN;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_OUT;
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_2MHz;
  GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
  GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;
  GPIO_Init(USB_DISCONNECT, &GPIO_InitStructure);  
#endif /* USB_USE_EXTERNAL_PULLUP */  
}

/*******************************************************************************
* Function Name  : Set_USBClock
* Description    : Configures USB Clock input (48MHz)
* Input          : None.
* Return         : None.
*******************************************************************************/
void Set_USBClock(void)
{
#if defined(STM32L1XX_MD) || defined(STM32L1XX_HD) || defined(STM32L1XX_MD_PLUS) 
  /* Enable USB clock */
  RCC_APB1PeriphClockCmd(RCC_APB1Periph_USB, ENABLE);
  
#elif defined(STM32F10X_CL)
  /* Select USBCLK source */
  RCC_OTGFSCLKConfig(RCC_OTGFSCLKSource_PLLVCO_Div3);

  /* Enable the USB clock */ 
  RCC_AHBPeriphClockCmd(RCC_AHBPeriph_OTG_FS, ENABLE) ;
  
#else 
  /* Select USBCLK source */
  RCC_USBCLKConfig(RCC_USBCLKSource_PLLCLK_1Div5);
  
  /* Enable the USB clock */
  RCC_APB1PeriphClockCmd(RCC_APB1Periph_USB, ENABLE);
#endif /* STM32F10X_CL */
}

/*******************************************************************************
* Function Name  : Enter_LowPowerMode
* Description    : Power-off system clocks and power while entering suspend mode
* Input          : None.
* Return         : None.
*******************************************************************************/
void Enter_LowPowerMode(void)
{
  /* Set the device state to suspend */
  bDeviceState = SUSPENDED;
}

/*******************************************************************************
* Function Name  : Leave_LowPowerMode
* Description    : Restores system clocks and power while exiting suspend mode
* Input          : None.
* Return         : None.
*******************************************************************************/
void Leave_LowPowerMode(void)
{
  DEVICE_INFO *pInfo = &Device_Info;

  /* Set the device state to the correct state */
  if (pInfo->Current_Configuration != 0)
  {
    /* Device configured */
    bDeviceState = CONFIGURED;
  }
  else
  {
    bDeviceState = ATTACHED;
  }
}

/*******************************************************************************
* Function Name  : USB_Interrupts_Config
* Description    : Configures the USB interrupts
* Input          : None.
* Return         : None.
*******************************************************************************/
void USB_Interrupts_Config(void)
{
  NVIC_InitTypeDef NVIC_InitStructure;

  NVIC_PriorityGroupConfig(NVIC_PriorityGroup_1);

#if defined(STM32L1XX_MD) || defined(STM32L1XX_HD) || defined(STM32L1XX_MD_PLUS) 
  NVIC_InitStructure.NVIC_IRQChannel = USB_LP_IRQn;
  NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1;
  NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
  NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
  NVIC_Init(&NVIC_InitStructure);
  
#elif defined(STM32F10X_CL) 
  /* Enable the USB Interrupts */
  NVIC_InitStructure.NVIC_IRQChannel = OTG_FS_IRQn;
  NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1;
  NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
  NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
  NVIC_Init(&NVIC_InitStructure);
  
#else
  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);
#endif /* STM32L1XX_XD */

  /* Enable USART Interrupt */
  NVIC_InitStructure.NVIC_IRQChannel = EVAL_COM1_IRQn;
  NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
  NVIC_Init(&NVIC_InitStructure);
}

/*******************************************************************************
* Function Name  : USB_Cable_Config
* Description    : Software Connection/Disconnection of USB Cable
* Input          : None.
* Return         : Status
*******************************************************************************/
void USB_Cable_Config (FunctionalState NewState)
{
#if defined(STM32L1XX_MD) || defined (STM32L1XX_HD)|| (STM32L1XX_MD_PLUS)
  if (NewState != DISABLE)
  {
    STM32L15_USB_CONNECT;
  }
  else
  {
    STM32L15_USB_DISCONNECT;
  }  

#elif defined(USE_STM3210C_EVAL)  
  if (NewState != DISABLE)
  {
    USB_DevConnect();
  }
  else
  {
    USB_DevDisconnect();
  }
  
#else /* USE_STM3210B_EVAL or USE_STM3210E_EVAL */
  if (NewState != DISABLE)
  {
    GPIO_ResetBits(USB_DISCONNECT, USB_DISCONNECT_PIN);
  }
  else
  {
    GPIO_SetBits(USB_DISCONNECT, USB_DISCONNECT_PIN);
  }
#endif /* USE_STM3210C_EVAL */
}

/*******************************************************************************
* Function Name  :  USART_Config_Default.
* Description    :  configure the EVAL_COM1 with default values.
* Input          :  None.
* Return         :  None.
*******************************************************************************/
void USART_Config_Default(void)
{
  /* EVAL_COM1 default configuration */
  /* EVAL_COM1 configured as follow:
        - BaudRate = 9600 baud  
        - Word Length = 8 Bits
        - One Stop Bit
        - Parity Odd
        - Hardware flow control disabled
        - Receive and transmit enabled
  */
  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_Odd;
  USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
  USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;

  /* Configure and enable the USART */
  STM_EVAL_COMInit(COM1, &USART_InitStructure);

  /* Enable the USART Receive interrupt */
  USART_ITConfig(EVAL_COM1, USART_IT_RXNE, ENABLE);
}

/*******************************************************************************
* Function Name  :  USART_Config.
* Description    :  Configure the EVAL_COM1 according to the line coding structure.
* Input          :  None.
* Return         :  Configuration status
                    TRUE : configuration done with success
                    FALSE : configuration aborted.
*******************************************************************************/
bool USART_Config(void)
{

  /* set the Stop bit*/
  switch (linecoding.format)
  {
    case 0:
      USART_InitStructure.USART_StopBits = USART_StopBits_1;
      break;
    case 1:
      USART_InitStructure.USART_StopBits = USART_StopBits_1_5;
      break;
    case 2:
      USART_InitStructure.USART_StopBits = USART_StopBits_2;
      break;
    default :
    {
      USART_Config_Default();
      return (FALSE);
    }
  }

  /* set the parity bit*/
  switch (linecoding.paritytype)
  {
    case 0:
      USART_InitStructure.USART_Parity = USART_Parity_No;
      break;
    case 1:
      USART_InitStructure.USART_Parity = USART_Parity_Even;
      break;
    case 2:
      USART_InitStructure.USART_Parity = USART_Parity_Odd;
      break;
    default :
    {
      USART_Config_Default();
      return (FALSE);
    }
  }

  /*set the data type : only 8bits and 9bits is supported */
  switch (linecoding.datatype)
  {
    case 0x07:
      /* With this configuration a parity (Even or Odd) should be set */
      USART_InitStructure.USART_WordLength = USART_WordLength_8b;
      break;
    case 0x08:
      if (USART_InitStructure.USART_Parity == USART_Parity_No)
      {
        USART_InitStructure.USART_WordLength = USART_WordLength_8b;
      }
      else 
      {
        USART_InitStructure.USART_WordLength = USART_WordLength_9b;
      }
      
      break;
    default :
    {
      USART_Config_Default();
      return (FALSE);
    }
  }

  USART_InitStructure.USART_BaudRate = linecoding.bitrate;
  USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
  USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;
 
  /* Configure and enable the USART */
  STM_EVAL_COMInit(COM1, &USART_InitStructure);

  return (TRUE);
}

/*******************************************************************************
* Function Name  : USB_To_USART_Send_Data.
* Description    : send the received data from USB to the UART 0.
* Input          : data_buffer: data address.
                   Nb_bytes: number of bytes to send.
* Return         : none.
*******************************************************************************/
void USB_To_USART_Send_Data(uint8_t* data_buffer, uint8_t Nb_bytes)
{
  
  uint32_t i;
  
  for (i = 0; i < Nb_bytes; i++)
  {
    USART_SendData(EVAL_COM1, *(data_buffer + i));
    while(USART_GetFlagStatus(EVAL_COM1, USART_FLAG_TXE) == RESET); 
  }  
}

/*******************************************************************************
* Function Name  : Handle_USBAsynchXfer.
* Description    : send data to USB.
* Input          : None.
* Return         : none.
*******************************************************************************/
void Handle_USBAsynchXfer (void)
{
  
  uint16_t USB_Tx_ptr;
  uint16_t USB_Tx_length;
  
  if(USB_Tx_State != 1)
  {
    if (USART_Rx_ptr_out == USART_RX_DATA_SIZE)
    {
      USART_Rx_ptr_out = 0;
    }
    
    if(USART_Rx_ptr_out == USART_Rx_ptr_in) 
    {
      USB_Tx_State = 0; 
      return;
    }
    
    if(USART_Rx_ptr_out > USART_Rx_ptr_in) /* rollback */
    { 
      USART_Rx_length = USART_RX_DATA_SIZE - USART_Rx_ptr_out;
    }
    else 
    {
      USART_Rx_length = USART_Rx_ptr_in - USART_Rx_ptr_out;
    }
    
    if (USART_Rx_length > VIRTUAL_COM_PORT_DATA_SIZE)
    {
      USB_Tx_ptr = USART_Rx_ptr_out;
      USB_Tx_length = VIRTUAL_COM_PORT_DATA_SIZE;
      
      USART_Rx_ptr_out += VIRTUAL_COM_PORT_DATA_SIZE;	
      USART_Rx_length -= VIRTUAL_COM_PORT_DATA_SIZE;	
    }
    else
    {
      USB_Tx_ptr = USART_Rx_ptr_out;
      USB_Tx_length = USART_Rx_length;
      
      USART_Rx_ptr_out += USART_Rx_length;
      USART_Rx_length = 0;
    }
    USB_Tx_State = 1; 
    
#ifdef USE_STM3210C_EVAL
    USB_SIL_Write(EP1_IN, &USART_Rx_Buffer[USB_Tx_ptr], USB_Tx_length);  
#else
    UserToPMABufferCopy(&USART_Rx_Buffer[USB_Tx_ptr], ENDP1_TXADDR, USB_Tx_length);
    SetEPTxCount(ENDP1, USB_Tx_length);
    SetEPTxValid(ENDP1); 
#endif /* USE_STM3210C_EVAL */
  }  
  
}
/*******************************************************************************
* Function Name  : UART_To_USB_Send_Data.
* Description    : send the received data from UART 0 to USB.
* Input          : None.
* Return         : none.
*******************************************************************************/
void USART_To_USB_Send_Data(void)
{
  
  if (linecoding.datatype == 7)
  {
    USART_Rx_Buffer[USART_Rx_ptr_in] = USART_ReceiveData(EVAL_COM1) & 0x7F;
  }
  else if (linecoding.datatype == 8)
  {
    USART_Rx_Buffer[USART_Rx_ptr_in] = USART_ReceiveData(EVAL_COM1);
  }
  
  USART_Rx_ptr_in++;
  
  /* To avoid buffer overflow */
  if(USART_Rx_ptr_in == USART_RX_DATA_SIZE)
  {
    USART_Rx_ptr_in = 0;
  }
}

/*******************************************************************************
* Function Name  : Get_SerialNum.
* Description    : Create the serial number string descriptor.
* Input          : None.
* Output         : None.
* Return         : None.
*******************************************************************************/
void Get_SerialNum(void)
{
  uint32_t Device_Serial0, Device_Serial1, Device_Serial2;

#if defined(STM32L1XX_MD) || defined(STM32L1XX_HD) || defined(STM32L1XX_MD_PLUS) 
  Device_Serial0 = *(uint32_t*)(0x1FF80050);
  Device_Serial1 = *(uint32_t*)(0x1FF80054);
  Device_Serial2 = *(uint32_t*)(0x1FF80064);
#else  
  Device_Serial0 = *(__IO uint32_t*)(0x1FFFF7E8);
  Device_Serial1 = *(__IO uint32_t*)(0x1FFFF7EC);
  Device_Serial2 = *(__IO uint32_t*)(0x1FFFF7F0);
#endif /* STM32L1XX_XD */  

  Device_Serial0 += Device_Serial2;

  if (Device_Serial0 != 0)
  {
    IntToUnicode (Device_Serial0, &Virtual_Com_Port_StringSerial[2] , 8);
    IntToUnicode (Device_Serial1, &Virtual_Com_Port_StringSerial[18], 4);
  }
}

/*******************************************************************************
* Function Name  : HexToChar.
* Description    : Convert Hex 32Bits value into char.
* Input          : None.
* Output         : None.
* Return         : None.
*******************************************************************************/
static void IntToUnicode (uint32_t value , uint8_t *pbuf , uint8_t len)
{
  uint8_t idx = 0;
  
  for( idx = 0 ; idx < len ; idx ++)
  {
    if( ((value >> 28)) < 0xA )
    {
      pbuf[ 2* idx] = (value >> 28) + '0';
    }
    else
    {
      pbuf[2* idx] = (value >> 28) + 'A' - 10; 
    }
    
    value = value << 4;
    
    pbuf[ 2* idx + 1] = 0;
  }
}
#ifdef STM32F10X_CL
/*******************************************************************************
* Function Name  : USB_OTG_BSP_uDelay.
* Description    : provide delay (usec).
* Input          : None.
* Output         : None.
* Return         : None.
*******************************************************************************/
void USB_OTG_BSP_uDelay (const uint32_t usec)
{
  RCC_ClocksTypeDef  RCC_Clocks;  

  /* Configure HCLK clock as SysTick clock source */
  SysTick_CLKSourceConfig(SysTick_CLKSource_HCLK);
  
  RCC_GetClocksFreq(&RCC_Clocks);
  
  SysTick_Config(usec * (RCC_Clocks.HCLK_Frequency / 1000000));  
  
  SysTick->CTRL  &= ~SysTick_CTRL_TICKINT_Msk ;
  
  while (!(SysTick->CTRL & SysTick_CTRL_COUNTFLAG_Msk));
}
#endif /* STM32F10X_CL */
/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
