/******************** (C) COPYRIGHT 2007 STMicroelectronics ********************
* File Name          : hw_config.c
* Author             : MCD Application Team
* Version            : V1.0
* Date               : 10/08/2007
* Description        : Hardware Configuration & Setup
********************************************************************************
* THE PRESENT SOFTWARE WHICH IS FOR GUIDANCE ONLY AIMS AT PROVIDING CUSTOMERS
* WITH CODING INFORMATION REGARDING THEIR PRODUCTS IN ORDER FOR THEM TO SAVE TIME.
* AS A RESULT, STMICROELECTRONICS SHALL NOT BE HELD LIABLE FOR ANY DIRECT,
* INDIRECT OR CONSEQUENTIAL DAMAGES WITH RESPECT TO ANY CLAIMS ARISING FROM THE
* CONTENT OF SUCH SOFTWARE AND/OR THE USE MADE BY CUSTOMERS OF THE CODING
* INFORMATION CONTAINED HEREIN IN CONNECTION WITH THEIR PRODUCTS.
*******************************************************************************/

/* Includes ------------------------------------------------------------------*/
#include "stm32f10x_lib.h"
#include "hw_config.h"
#include "usb_lib.h"

/* Private typedef -----------------------------------------------------------*/
/* Private define ------------------------------------------------------------*/
#define JOY_UP       GPIO_Pin_8  /* PD.08 */
#define JOY_DOWN     GPIO_Pin_14 /* PD.14 */
#define JOY_LEFT     GPIO_Pin_1  /* PE.01 */
#define JOY_RIGHT    GPIO_Pin_0  /* PE.00 */

/* Private macro -------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/
ErrorStatus HSEStartUpStatus;

/* Extern variables ----------------------------------------------------------*/
/* Private function prototypes -----------------------------------------------*/
/* Private functions ---------------------------------------------------------*/

/*******************************************************************************
* Function Name  : Set_System
* Description    : Configures Main system clocks & power.
* Input          : None.
* Return         : None.
*******************************************************************************/
void Set_System(void)
{
  GPIO_InitTypeDef GPIO_InitStructure;

  /* SYSCLK, HCLK, PCLK2 and PCLK1 configuration -----------------------------*/   
  /* RCC system reset(for debug purpose) */
  RCC_DeInit();

  /* Enable HSE */
  RCC_HSEConfig(RCC_HSE_ON);

  /* Wait till HSE is ready */
  HSEStartUpStatus = RCC_WaitForHSEStartUp();

  if(HSEStartUpStatus == SUCCESS)
  {
    /* Enable Prefetch Buffer */
    FLASH_PrefetchBufferCmd(FLASH_PrefetchBuffer_Enable);

    /* Flash 2 wait state */
    FLASH_SetLatency(FLASH_Latency_2);
 
    /* HCLK = SYSCLK */
    RCC_HCLKConfig(RCC_SYSCLK_Div1); 
  
    /* PCLK2 = HCLK */
    RCC_PCLK2Config(RCC_HCLK_Div1); 

    /* PCLK1 = HCLK/2 */
    RCC_PCLK1Config(RCC_HCLK_Div2);

    /* ADCCLK = PCLK2/6 */
    RCC_ADCCLKConfig(RCC_PCLK2_Div6);

    /* PLLCLK = 8MHz * 9 = 72 MHz */
    RCC_PLLConfig(RCC_PLLSource_HSE_Div1, RCC_PLLMul_9);

    /* Enable PLL */ 
    RCC_PLLCmd(ENABLE);

    /* Wait till PLL is ready */
    while(RCC_GetFlagStatus(RCC_FLAG_PLLRDY) == RESET)
    {
    }

    /* Select PLL as system clock source */
    RCC_SYSCLKConfig(RCC_SYSCLKSource_PLLCLK);

    /* Wait till PLL is used as system clock source */
    while(RCC_GetSYSCLKSource() != 0x08)
    {
    }
  }
  
  /* Enable GPIOD and GPIOE clock */
  RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOD | RCC_APB2Periph_GPIOE, ENABLE);
  
  /* PD.09 used as USB pull-up */
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9;
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_OD;
  GPIO_Init(GPIOD, &GPIO_InitStructure);

  /* Configure the JoyStick IOs */
  /* Key up + Key down */
  GPIO_InitStructure.GPIO_Pin = JOY_UP | JOY_DOWN;
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU;
  GPIO_Init(GPIOD, &GPIO_InitStructure);

  /* Key left + Key right*/
  GPIO_InitStructure.GPIO_Pin = JOY_LEFT | JOY_RIGHT;
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU;
  GPIO_Init(GPIOE, &GPIO_InitStructure);
}

/*******************************************************************************
* Function Name  : Set_USBClock
* Description    : Configures USB Clock input (48MHz).
* Input          : None.
* Output         : None.
* Return         : None.
*******************************************************************************/
void Set_USBClock(void)
{
  /* Select USBCLK source */
  RCC_USBCLKConfig(RCC_USBCLKSource_PLLCLK_1Div5);

  /* Enable USB clock */
  RCC_APB1PeriphClockCmd(RCC_APB1Periph_USB, ENABLE);
}

/*******************************************************************************
* Function Name  : Enter_LowPowerMode.
* Description    : Power-off system clocks and power while entering suspend mode.
* Input          : None.
* Output         : None.
* Return         : None.
*******************************************************************************/
void Enter_LowPowerMode(void)
{
}

/*******************************************************************************
* Function Name  : Leave_LowPowerMode.
* Description    : Restores system clocks and power while exiting suspend mode.
* Input          : None.
* Output         : None.
* Return         : None.
*******************************************************************************/
void Leave_LowPowerMode(void)
{
}

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

#ifdef  VECT_TAB_RAM  
  /* Set the Vector Table base location at 0x20000000 */ 
  NVIC_SetVectorTable(NVIC_VectTab_RAM, 0x0);
#else  /* VECT_TAB_FLASH */
  /* Set the Vector Table base location at 0x08000000 */
  NVIC_SetVectorTable(NVIC_VectTab_FLASH, 0x0);   
#endif 

  NVIC_PriorityGroupConfig(NVIC_PriorityGroup_0);

  NVIC_InitStructure.NVIC_IRQChannel = USB_LP_CAN_RX0_IRQChannel;
  NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
  NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
  NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
  NVIC_Init(&NVIC_InitStructure);
}

/*******************************************************************************
* Function Name  : USB_Cable_Config.
* Description    : Software Connection/Disconnection of USB Cable.
* Input          : NewState: new state.
* Output         : None.
* Return         : None
*******************************************************************************/
void USB_Cable_Config (FunctionalState NewState)
{ 
  if (NewState != DISABLE)
  {
    GPIO_ResetBits(GPIOD, GPIO_Pin_9);
  }
  else
  {
    GPIO_SetBits(GPIOD, GPIO_Pin_9);
  }
}

/*******************************************************************************
* Function Name : JoyState.
* Description   : Decodes the Joystick direction.
* Input         : None.
* Output        : None.
* Return value  : The direction value.
*******************************************************************************/
u8 JoyState(void)
{
  /* "right" key is pressed */
  if (!GPIO_ReadInputDataBit(GPIOE, JOY_RIGHT))
  {
    return RIGHT;
  }
  /* "left" key is pressed */
  if (!GPIO_ReadInputDataBit(GPIOE, JOY_LEFT))
  {
    return LEFT;
  }
  /* "up" key is pressed */
  if (!GPIO_ReadInputDataBit(GPIOD, JOY_UP))
  {
    return UP;
  }
  /* "down" key is pressed */
  if (!GPIO_ReadInputDataBit(GPIOD, JOY_DOWN))
  {
    return DOWN;
  }
  /* No key is pressed */
  else
  {
    return 0;
  }
}

/*******************************************************************************
* Function Name : Joystick_Send.
* Description   : prepares buffer to be sent containing Joystick event infos.
* Input         : Keys: keys received from terminal.
* Output        : None.
* Return value  : None.
*******************************************************************************/
void Joystick_Send(u8 Keys)
{
  u8 Mouse_Buffer[4] = {0, 0, 0, 0};
  s8 X = 0, Y = 0;

  switch (Keys)
  {
    case LEFT:
      X -= CURSOR_STEP;
      break;
    case RIGHT:

      X += CURSOR_STEP;
      break;
    case UP:
      Y -= CURSOR_STEP;
      break;
    case DOWN:
      Y += CURSOR_STEP;
      break;
    default:
      return;
  }

  /* prepare buffer to send */
  Mouse_Buffer[1] = X;
  Mouse_Buffer[2] = Y;
  /*copy mouse position info in ENDP1 Tx Packet Memory Area*/
  UserToPMABufferCopy(Mouse_Buffer, GetEPTxAddr(ENDP1), 4);
  /* enable endpoint for transmission */
  SetEPTxValid(ENDP1);
}

/******************* (C) COPYRIGHT 2007 STMicroelectronics *****END OF FILE****/