main.c

arm st912 GPIO 操作实例

/******************** (C) COPYRIGHT 2006 STMicroelectronics ********************
* File Name          : main.c
* Author             : MCD Application Team
* Date First Issued  : 05/18/2006 : Version 1.0
* Description        : Main program body
********************************************************************************
* History:
* 05/24/2006 : Version 1.1
* 05/18/2006 : Version 1.0
********************************************************************************
* 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 "91x_lib.h"
#include "LCD.h"

/* Private typedef -----------------------------------------------------------*/
/* Private define ------------------------------------------------------------*/

// Pll cfg
#define M               (25UL)    // PLL Pre-divider
#define P               (4UL)     // PLL Post-divider
#define N               (48UL*P)  // PLL Feedback divider

#define LED2  0x1
#define LED3  0x2
#define LED4  0x4
#define LED5  0x8
/* Private macro -------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/
const char disp_ln1[] = "STR91x DEMO";
const char disp_ln2[] = "GPIO TEST";
/* Private function prototypes -----------------------------------------------*/
  void SCU_Configuration(void);
  void VIC_Configuration(void);
  static void Delay(u32 nCount);

/* Private functions ---------------------------------------------------------*/
/*******************************************************************************
* Function Name  : main
* Description    : Main program
* Input          : None
* Output         : None
* Return         : None
*******************************************************************************/
int main()
{

  GPIO_InitTypeDef GPIO_InitStructure;
  WIU_InitTypeDef WIU_InitStructure;
  int i;


  #ifdef DEBUG
    debug();
  #endif

/* Configure the system clocks */
  SCU_Configuration();
  
  GPIO_DeInit(GPIO2);
  GPIO_DeInit(GPIO8);
  GPIO_DeInit(GPIO6);
  
  
/* GPIO Configuration --------------------------------------------------------*/
  //L2
  GPIO_DeInit(GPIO9);
  GPIO_StructInit(&GPIO_InitStructure);
  GPIO_InitStructure.GPIO_Direction = GPIO_PinOutput;
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6;
  GPIO_InitStructure.GPIO_Type = GPIO_Type_PushPull ;
  GPIO_Init (GPIO9, &GPIO_InitStructure);
  
  //L3
  GPIO_DeInit(GPIO3);
  GPIO_StructInit(&GPIO_InitStructure);
  GPIO_InitStructure.GPIO_Direction = GPIO_PinOutput;
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_7;
  GPIO_InitStructure.GPIO_Type = GPIO_Type_PushPull ;
  GPIO_InitStructure.GPIO_Alternate = GPIO_OutputAlt1;
  GPIO_Init (GPIO3, &GPIO_InitStructure);
  
  //L4
  GPIO_DeInit(GPIO0);
  GPIO_StructInit(&GPIO_InitStructure);
  GPIO_InitStructure.GPIO_Direction = GPIO_PinOutput;
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_1;
  GPIO_InitStructure.GPIO_Type = GPIO_Type_PushPull ;
  GPIO_InitStructure.GPIO_Alternate = GPIO_OutputAlt1;
  GPIO_Init (GPIO0, &GPIO_InitStructure);
  
  //L5
//  GPIO_DeInit(GPIO6);
  GPIO_StructInit(&GPIO_InitStructure);
  GPIO_InitStructure.GPIO_Direction = GPIO_PinOutput;
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6;
  GPIO_InitStructure.GPIO_Type = GPIO_Type_PushPull ;
  GPIO_InitStructure.GPIO_Alternate = GPIO_OutputAlt1;
  GPIO_Init (GPIO6, &GPIO_InitStructure);
  
  //K5
//  GPIO_DeInit(GPIO6);
  GPIO_StructInit(&GPIO_InitStructure);
  GPIO_InitStructure.GPIO_Direction = GPIO_PinInput;
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_5;
  GPIO_InitStructure.GPIO_Type = GPIO_Type_PushPull ;
  GPIO_Init (GPIO6, &GPIO_InitStructure);
  
/*LCD Display -----------------------------------------------------------------*/ 
  LCD_Init();
  LCD_Clr();
  LCD_SetCursor(0x02);
  for(i=0;disp_ln1[i]!='\0';i++)
  	LCD_DISP_CHAR(disp_ln1[i]);

  LCD_SetCursor(0x42);
  for(i=0;disp_ln2[i]!='\0';i++)
  	LCD_DISP_CHAR(disp_ln2[i]);
  	

  
 
 // SCU_MCLKSourceConfig(SCU_MCLK_OSC);     /*Main clock = OSC*/

/* Configure and enable the interrupt controller */
  VIC_Configuration();

  	
/* Clear the WIU line 21 pending bit */
  WIU_ClearITPendingBit(WIU_Line21);

  WIU_InitStructure.WIU_Mode = WIU_Mode_Interrupt ;
  WIU_InitStructure.WIU_Line = WIU_Line21 ;
  WIU_InitStructure.WIU_TriggerEdge = WIU_RisingEdge ;
  WIU_Init(&WIU_InitStructure);  	

/*External interrupt------------------------------------------------------------*/
  SCU_WakeUpLineConfig(21);
 
  GPIO_WriteBit(GPIO9, GPIO_Pin_6, 1);
  GPIO_WriteBit(GPIO3, GPIO_Pin_7, 1);
  GPIO_WriteBit(GPIO0, GPIO_Pin_1, 1);
  GPIO_WriteBit(GPIO6, GPIO_Pin_6, 1);
  while(1)
  {
    /* Toggle leds connected to P9.6, P3.7, P0.1 and P6.6 pins */
    switch(disp_led)
    {
      case LED2:
	    GPIO_WriteBit(GPIO9, GPIO_Pin_6, (BitAction)((1-GPIO_ReadBit(GPIO9, GPIO_Pin_6))));
	    break;
	  case LED3:
	    GPIO_WriteBit(GPIO3, GPIO_Pin_7, (BitAction)((1-GPIO_ReadBit(GPIO3, GPIO_Pin_7))));
	    break;
	  case LED4:
	    GPIO_WriteBit(GPIO0, GPIO_Pin_1, (BitAction)((1-GPIO_ReadBit(GPIO0, GPIO_Pin_1))));
	    break;
	  case LED5:
	    GPIO_WriteBit(GPIO6, GPIO_Pin_6, (BitAction)((1-GPIO_ReadBit(GPIO6, GPIO_Pin_6))));
	    break;
	  default:
	    break;
	 }
//     Delay(0x7FFFF);
//     Delay(0x7FFFF);
     for(i=0;i<100;i++)
       Delay(10000);
  }
}

/*******************************************************************************
* Function Name  : SCU_Configuration
* Description    : Configures the system clocks.
* Input          : None
* Output         : None
* Return         : None
*******************************************************************************/
void SCU_Configuration(void)
{

  /*-------------------- System Clock Config --------------------*/
  SCU_MCLKSourceConfig(SCU_MCLK_OSC);
  SCU_PLLCmd(DISABLE);
  SCU_PLLFactorsConfig(N,M,P);
  SCU_PLLCmd(ENABLE);
  while(!(SCU->SYSSTATUS&SCU_FLAG_LOCK));
  SCU_MCLKSourceConfig(SCU_MCLK_PLL);
  
  /* Enable the __GPIO9 __GPIO8 __GPIO6 __GPIO3 __GPIO2 __GPIO0*/
  SCU_APBPeriphClockConfig(__GPIO9 ,ENABLE);
  SCU_APBPeriphClockConfig(__GPIO3 ,ENABLE);
  SCU_APBPeriphClockConfig(__GPIO0 ,ENABLE);
  
  SCU_APBPeriphClockConfig(__GPIO2 ,ENABLE);
  SCU_APBPeriphClockConfig(__GPIO6 ,ENABLE);
  SCU_APBPeriphClockConfig(__GPIO8 ,ENABLE);

  /* Enable WIU clock */
  SCU_APBPeriphClockConfig(__WIU, ENABLE);
  WIU_DeInit();
  
}

/*******************************************************************************
* Function Name  : Delay
* Description    : Inserts a delay time.
* Input          : nCount: specifies the delay time length.
* Output         : None
* Return         : None
*******************************************************************************/
static void Delay(u32 nCount)
{
  u32 j = 0;

  for(j = nCount; j != 0; j--);
}

/*******************************************************************************
* Function Name  : VIC_Configuration
* Description    : This function configures and enables the interrupt controller.
* Input          : None
* Output         : None
* Return         : None
*******************************************************************************/
void VIC_Configuration(void)
{
  /* Enable VIC clock */
  SCU_AHBPeriphClockConfig(__VIC,ENABLE);
  VIC_DeInit();
  VIC_InitDefaultVectors();
  /* Configure the External interrupt group 2 priority */
  VIC_Config(EXTIT2_ITLine, VIC_IRQ, 0);
  /* Enable the External interrupt group 2 */
  VIC_ITCmd(EXTIT2_ITLine, ENABLE);
}


/******************* (C) COPYRIGHT 2006 STMicroelectronics *****END OF FILE****/