/*******************************************************************************
* File Name          : main.c
* Author             : Wuhan R&D Center, Embest
* Date First Issued  : 08/08/2008
* Description        : Main program body
********************************************************************************/

/* Includes ------------------------------------------------------------------*/
#include "stm32f10x_lib.h"
#include <stdio.h>

/************ 用于定义ITM Viewer相关的ITM激励寄存器端口 ************************/
#define ITM_Port8(n)    (*((volatile unsigned char *)(0xE0000000+4*n)))
#define ITM_Port16(n)   (*((volatile unsigned short*)(0xE0000000+4*n)))
#define ITM_Port32(n)   (*((volatile unsigned long *)(0xE0000000+4*n)))

#define DEMCR           (*((volatile unsigned long *)(0xE000EDFC)))
#define TRCENA          0x01000000

/*用于定义是否使用ITM Viewer*/
//#define DBG_ITM   

/* Private typedef -----------------------------------------------------------*/
typedef enum {FAILED = 0, PASSED = !FAILED} TestStatus;

/* Private define ------------------------------------------------------------*/
#define BufferSize  32

/* Private macro -------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/
DMA_InitTypeDef DMA_InitStructure;
vu16 CurrDataCounter= 0;
volatile TestStatus TransferStatus;
ErrorStatus HSEStartUpStatus;
uc32 SRC_Const_Buffer[BufferSize]= {0x01020304,0x05060708,0x090A0B0C,0x0D0E0F10,
                                    0x11121314,0x15161718,0x191A1B1C,0x1D1E1F20,
                                    0x21222324,0x25262728,0x292A2B2C,0x2D2E2F30,
                                    0x31323334,0x35363738,0x393A3B3C,0x3D3E3F40,
                                    0x41424344,0x45464748,0x494A4B4C,0x4D4E4F50,
                                    0x51525354,0x55565758,0x595A5B5C,0x5D5E5F60,
                                    0x61626364,0x65666768,0x696A6B6C,0x6D6E6F70,
                                    0x71727374,0x75767778,0x797A7B7C,0x7D7E7F80};
u32 DST_Buffer[BufferSize];

/* Private function prototypes -----------------------------------------------*/
void RCC_Configuration(void);
void NVIC_Configuration(void);
void GPIO_Configuration(void);
void USART_Configuration(void); 
TestStatus Buffercmp(uc32* pBuffer, u32* pBuffer1, u16 BufferLength);
    
/* Private functions ---------------------------------------------------------*/

/*******************************************************************************
* Function Name  : main
* Description    : Main program
* Input          : None
* Output         : None
* Return         : None
*******************************************************************************/
int main(void)
{
  int count;
#ifdef DEBUG
  debug();
#endif

  /* System Clocks Configuration */
  RCC_Configuration();
       
  /* NVIC configuration */
  NVIC_Configuration();

    /* Configure the GPIOs */
  GPIO_Configuration();

    /* Configure the USART1 */
  USART_Configuration();

  printf("\n boot success!\n");

  /* DMA channel6 configuration */
  DMA_DeInit(DMA1_Channel6);
  DMA_InitStructure.DMA_PeripheralBaseAddr = (u32)SRC_Const_Buffer;
  DMA_InitStructure.DMA_MemoryBaseAddr = (u32)DST_Buffer;
  DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralSRC;
  DMA_InitStructure.DMA_BufferSize = BufferSize;
  DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Enable;
  DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable;
  DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_Word;
  DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_Word;
  DMA_InitStructure.DMA_Mode = DMA_Mode_Normal;
  DMA_InitStructure.DMA_Priority = DMA_Priority_High;
  DMA_InitStructure.DMA_M2M = DMA_M2M_Enable;
  DMA_Init(DMA1_Channel6, &DMA_InitStructure);

  /* Enable DMA Channel6 Transfer Complete interrupt */
  DMA_ITConfig(DMA1_Channel6, DMA_IT_TC, ENABLE);

  /* Get Current Data Counter value before transfer begins */
  CurrDataCounter= DMA_GetCurrDataCounter(DMA1_Channel6);

  /* Enable DMA Channel6 transfer */
  DMA_Cmd(DMA1_Channel6, ENABLE);
  /* Wait for completing transfer */
  while( CurrDataCounter!=0) ;

  printf(" Complete transfer!\n");
  printf("\n The contents of the SRC_Const_Buffer are:");
  for(count=0;count<BufferSize;count++)
      {
		if(count%4==0) printf("\n");
        printf("0x%-9x",SRC_Const_Buffer[count]);
	   }
  printf("\n The contents of the DST_Buffer are:");
  for(count=0;count<BufferSize;count++)
      {
		if(count%4==0) printf("\n");
        printf("0x%-9x",DST_Buffer[count]);
	   }

  /* Check if the transmitted and received data are equal */
  TransferStatus = Buffercmp(SRC_Const_Buffer, DST_Buffer, BufferSize);
  /* TransferStatus = PASSED, if the transmitted and received data 
     are the same */
  /* TransferStatus = FAILED, if the transmitted and received data 
     are different */
 if(TransferStatus== FAILED) 
              printf("\n DMA test fail!\n");
 else
              printf("\n DMA test success!\n");    
  while(1) ;
}

/*******************************************************************************
* Function Name  : RCC_Configuration
* Description    : Configures the different system clocks.
* Input          : None
* Output         : None
* Return         : None
*******************************************************************************/
void RCC_Configuration(void)
{
  /* 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)
  {
    /* HCLK = SYSCLK */
    RCC_HCLKConfig(RCC_SYSCLK_Div1); 
      /* PCLK2 = HCLK */
    RCC_PCLK2Config(RCC_HCLK_Div1); 
      /* PCLK1 = HCLK/2 */
    RCC_PCLK1Config(RCC_HCLK_Div2);
      /* Flash 2 wait state */
    FLASH_SetLatency(FLASH_Latency_2);
    /* Enable Prefetch Buffer */
    FLASH_PrefetchBufferCmd(FLASH_PrefetchBuffer_Enable);
       /* 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 DMA,USART1 and GPIOA clock */
   RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1|RCC_APB2Periph_GPIOA, ENABLE);
   RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA1, ENABLE);
}

/*******************************************************************************
* Function Name  : GPIO_Configuration
* Description    : Configures the different GPIO ports.
* Input          : None
* Output         : None
* Return         : None
*******************************************************************************/
void GPIO_Configuration(void)
{
  GPIO_InitTypeDef GPIO_InitStructure;
    
  /* Configure USART1 Tx (PA.09) as alternate function push-pull */	
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
  GPIO_Init(GPIOA, &GPIO_InitStructure);
    
  /* Configure USART1 Rx (PA.10) as input floating */
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
  GPIO_Init(GPIOA, &GPIO_InitStructure);
}

/*******************************************************************************
* Function Name  : NVIC_Configuration
* Description    : Configure the nested vectored interrupt controller.
* Input          : None
* Output         : None
* Return         : None
*******************************************************************************/
void NVIC_Configuration(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

  /* Enable DMA channel6 IRQ Channel */
  NVIC_InitStructure.NVIC_IRQChannel = DMA1_Channel6_IRQChannel;
  NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
  NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
  NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
  NVIC_Init(&NVIC_InitStructure);
}

/*******************************************************************************
* Function Name  : Buffercmp
* Description    : Compares two buffers.
* Input          : - pBuffer, pBuffer1: buffers to be compared.
*                : - BufferLength: buffer's length
* Output         : None
* Return         : PASSED: pBuffer identical to pBuffer1
*                  FAILED: pBuffer differs from pBuffer1
*******************************************************************************/
TestStatus Buffercmp(uc32* pBuffer, u32* pBuffer1, u16 BufferLength)
{
  while(BufferLength--)
  {
    if(*pBuffer != *pBuffer1)
    {
      return FAILED;
    }
    
    pBuffer++;
    pBuffer1++;
  }

  return PASSED;  
}

#ifdef  DEBUG
/*******************************************************************************
* Function Name  : assert_failed
* Description    : Reports the name of the source file and the source line number
*                  where the assert error has occurred.
* Input          : - file: pointer to the source file name
*                  - line: assert error line source number
* Output         : None
* Return         : None
***********  ********************************************************************/
void assert_failed(u8* file, u32 line)
{ 
  /* User can add his own implementation to report the file name and line number,
     ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */

  /* Infinite loop */
  while (1)
  {
  }
}
#endif


/*******************************************************************************
* Function Name  : USART_Configuration
* Description    : Configures the USART1.
* Input          : None
* Output         : None
* Return         : None
*******************************************************************************/
void USART_Configuration(void)
{
  USART_InitTypeDef USART_InitStructure;
USART_ClockInitTypeDef  USART_ClockInitStructure;
/* USART1 configuration ------------------------------------------------------*/
  /* USART1 configured as follow:
        - BaudRate = 115200 baud  
        - Word Length = 8 Bits
        - One Stop Bit
        - No parity
        - Hardware flow control disabled (RTS and CTS signals)
        - Receive and transmit enabled
        - USART Clock disabled
        - USART CPOL: Clock is active low
        - USART CPHA: Data is captured on the middle 
        - USART LastBit: The clock pulse of the last data bit is not output to 
                         the SCLK pin
  */
USART_ClockInitStructure.USART_Clock = USART_Clock_Disable;
USART_ClockInitStructure.USART_CPOL = USART_CPOL_Low;
USART_ClockInitStructure.USART_CPHA = USART_CPHA_2Edge;
USART_ClockInitStructure.USART_LastBit = USART_LastBit_Disable;
/* Configure the USART1 synchronous paramters */
USART_ClockInit(USART1, &USART_ClockInitStructure);

USART_InitStructure.USART_BaudRate = 115200;
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_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;
/* Configure USART1 basic and asynchronous paramters */
USART_Init(USART1, &USART_InitStructure);
    
  /* Enable USART1 */
  USART_Cmd(USART1, ENABLE);
}

 /*******************************************************************************
* Function Name  : fputc
* Description    : Retargets the C library printf function to the USART or ITM Viewer.
* Input          : None
* Output         : None
* Return         : None
*******************************************************************************/

int fputc(int ch, FILE *f)
{
#ifdef DBG_ITM
/* 将Printf内容发往ITM激励寄存器端口  */
  if (DEMCR & TRCENA) {
    while (ITM_Port32(0) == 0);
    ITM_Port8(0) = ch;
  }
#else  
/* 将Printf内容发往串口 */
  USART_SendData(USART1, (unsigned char) ch);
  while (!(USART1->SR & USART_FLAG_TXE));
#endif  
  return (ch);
}

