hardware.c

一个SD卡读写源码. KEIL环境下. 做嵌入式开发驱动的值得一看!

#include "stm32f10x_lib.h"
#include "stdio.h"
#include "hardware.h"


#define USARTx   USART1                           // USART1 is used
ErrorStatus HSEStartUpStatus;


void Hardware_Initial(void)
{
   /* System Clocks Configuration */
  RCC_Configuration();

  /* NVIC Configuration */
  NVIC_Configuration();
  
  /* GPIO ports pins Configuration */
  GPIO_Configuration();
  /*UART Initial*/
  SetupUART();
  // stm32_Init ();   
}
/*******************************************************************************
* 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)
  {
    /* Enable Prefetch Buffer */
    FLASH_PrefetchBufferCmd(FLASH_PrefetchBuffer_Enable);
    
    /* HCLK = SYSCLK */
    RCC_HCLKConfig(RCC_SYSCLK_Div1); 
  
    /* PCLK2 = HCLK */
    RCC_PCLK2Config(RCC_HCLK_Div1); 

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

    /* Select HSE as system clock source */
    RCC_SYSCLKConfig(RCC_SYSCLKSource_HSE);

    /* Wait till HSE is used as system clock source */
    while(RCC_GetSYSCLKSource() != 0x04)
    {
    }
  }
  
  /* GPIOA and GPIOC clock enable */
  RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA | RCC_APB2Periph_GPIOC, ENABLE);
  /* Enable USART1 and GPIOA clock                                            */
  RCC_APB2PeriphClockCmd (RCC_APB2Periph_USART1 | RCC_APB2Periph_GPIOA, ENABLE);
  /* CAN Periph clock enable */
  RCC_APB1PeriphClockCmd(RCC_APB1Periph_CAN, 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 PC.06, PC.07, PC.04 and PC.05 as output push-pull */
  GPIO_InitStructure.GPIO_Pin =  GPIO_Pin_6 | GPIO_Pin_7 | GPIO_Pin_4 | GPIO_Pin_4;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
  GPIO_Init(GPIOC, &GPIO_InitStructure);

  /* Configure CAN pin: RX */
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_11;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU;
  GPIO_Init(GPIOA, &GPIO_InitStructure);
  
  /* Configure CAN pin: TX */
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_12;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
  GPIO_Init(GPIOA, &GPIO_InitStructure);
}

/*******************************************************************************
* Function Name  : Led_OFF
* Description    : Turn off the Read/Write LEDs. 
* Input          : LED num.	 1,2,3,4
* Output         : None.
* Return         : None.
*******************************************************************************/
void Led_OFF(unsigned char ucLED)
{
  GPIO_ResetBits(GPIOC, (1<<(8-ucLED)));
}

/*******************************************************************************
* Function Name  : Led_ON
* Description    : Turn off the Read/Write LEDs. 
* Input          : LED num.1,2,3,4
* Output         : None.
* Return         : None.
*******************************************************************************/
void Led_ON(unsigned char ucLED)
{
  GPIO_SetBits(GPIOC, (1<<(8-ucLED)));
}

/*******************************************************************************
* Function Name  : Led_Trigle
* Description    : Turn off the Read/Write LEDs. 
* Input          : LED num.	1,2,3,4
* Input          : Trigle num
* Output         : None.
* Return         : None.
*******************************************************************************/
void Led_Trigle(unsigned char ucLED,unsigned char  ucT)
{
  volatile unsigned int i,j,k;   
  while (ucT >=1)	
  {   
   GPIO_SetBits(GPIOC, (1<<(8-ucLED)));
   for (i=0;i<1000;i++)
   for(k=0;k<400;k++)
  {j++ ;}

   GPIO_ResetBits(GPIOC, (1<<(8-ucLED)));
   for (i=0;i<1000;i++)
   for(k=0;k<400;k++)
    {j++ ;}
 
  ucT--;
  } 
}
/*******************************************************************************
* Function Name  : NVIC_Configuration
* Description    : Configures the NVIC and Vector Table base address.
* 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

  /* enabling interrupt */
  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);
}
  extern int  SendChar (int ch);         
 
 void SetupUART (void)  {

  GPIO_InitTypeDef  GPIO_InitStructure;
  USART_InitTypeDef USART_InitStructure;

  /* Enable GPIOA clock                                                       */
  RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE);

  /* Configure USART1 Rx (PA10) as input floating                             */
  GPIO_InitStructure.GPIO_Pin   = GPIO_Pin_10;
  GPIO_InitStructure.GPIO_Mode  = GPIO_Mode_IN_FLOATING;
  GPIO_Init(GPIOA, &GPIO_InitStructure);

  /* Configure USART1 Tx (PA9) as alternate function push-pull                */
  GPIO_InitStructure.GPIO_Pin   = GPIO_Pin_9;
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
  GPIO_InitStructure.GPIO_Mode  = GPIO_Mode_AF_PP;
  GPIO_Init(GPIOA, &GPIO_InitStructure);

  /* 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_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;
  USART_InitStructure.USART_Clock               = USART_Clock_Disable;
  USART_InitStructure.USART_CPOL                = USART_CPOL_Low;
  USART_InitStructure.USART_CPHA                = USART_CPHA_2Edge;
  USART_InitStructure.USART_LastBit             = USART_LastBit_Disable;
  USART_Init(USART1, &USART_InitStructure);

  USART_Cmd(USART1, ENABLE); 
             /* Enable USART1                      */
   }
 


/*******************************************************************************
* Function Name  : SPI_Config
* Description    : Initializes the SPI1 and CS pins.
* Input          : None
* Output         : None
* Return         : None
*******************************************************************************/
void SPI_Config(void)
{
  GPIO_InitTypeDef  GPIO_InitStructure;
  SPI_InitTypeDef   SPI_InitStructure;

  /* GPIOA and GPIOD Periph clock enable */
  RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA | RCC_APB2Periph_GPIOD, ENABLE);
  /* SPI1 Periph clock enable */
  RCC_APB2PeriphClockCmd(RCC_APB2Periph_SPI1, ENABLE);

  /* Configure SPI1 pins: SCK, MISO and MOSI */
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_5 | GPIO_Pin_6 | GPIO_Pin_7;
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
  GPIO_Init(GPIOA, &GPIO_InitStructure);

  /* Configure PD9 pin: CS pin  ,PD10 : SD Power*/
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9|GPIO_Pin_10;
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
  GPIO_Init(GPIOD, &GPIO_InitStructure);

  /* SPI1 Config */
  SPI_InitStructure.SPI_Direction = SPI_Direction_2Lines_FullDuplex;
  SPI_InitStructure.SPI_Mode = SPI_Mode_Master;
  SPI_InitStructure.SPI_DataSize = SPI_DataSize_8b;
  SPI_InitStructure.SPI_CPOL = SPI_CPOL_High;
  SPI_InitStructure.SPI_CPHA = SPI_CPHA_2Edge;
  SPI_InitStructure.SPI_NSS = SPI_NSS_Soft;
  SPI_InitStructure.SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_128;
  SPI_InitStructure.SPI_FirstBit = SPI_FirstBit_MSB;
  SPI_InitStructure.SPI_CRCPolynomial = 7;
  SPI_Init(SPI1, &SPI_InitStructure);

  /* SPI1 enable */
  SPI_Cmd(SPI1, ENABLE);
}
/*----------------------------------------------------------------------------
  Read character from Serial Port   (blocking read)
 *----------------------------------------------------------------------------*/
int ser_getchar (void) {

  while (!(USARTx->SR & USART_FLAG_RXNE));

  return ((int)(USARTx->DR & 0x1FF));
}
/*----------------------------------------------------------------------------
  Write character to Serial Port
 *----------------------------------------------------------------------------*/
int ser_putchar (int c) {

  while (!(USARTx->SR & USART_FLAG_TXE));
  USARTx->DR = (c & 0x1FF);

  return (c);
}

/* Implementation of putchar (also used by printf function to output data)    */
 /* Write character to Serial Port     */
 /*
int SendChar (int ch)  {               

  USART_SendData(USART1, (unsigned char) ch);
  while (!(USART1->SR & USART_FLAG_TXE));
  return (ch);
}			*/
void  delay(unsigned int i)
{ 
 volatile unsigned int j,k;
  for (;i>1;i--)
   for(k=0;k<400;k++)
    {j++ ;}
 
}