main.c

ST的ARM9芯片STR912的软件库函数V2.0

/******************** (C) COPYRIGHT 2007 STMicroelectronics ********************
* File Name          : main.c
* Author             : MCD Application Team
* Version            : V2.0
* Date               : 12/07/2007
* Description        : Program using the TIM peripheral.
*                      Shows TIM1 configured in Output Compare mode with interrupt
*                      generation.
********************************************************************************
* 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"

/* Private typedef -----------------------------------------------------------*/
/* Private define ------------------------------------------------------------*/
/* Private macro -------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/

TIM_InitTypeDef   TIM_InitStructure;
GPIO_InitTypeDef  GPIO_InitStructure;

/* Private function prototypes -----------------------------------------------*/
void SCU_Configuration(void);
/* Private functions ---------------------------------------------------------*/

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

  #ifdef DEBUG
    debug();
  #endif

  /* Configure the system clocks */
  SCU_Configuration();

  /* Init VIC */
  VIC_DeInit();
  /* initialize VICs default vector registers*/
  VIC_InitDefaultVectors(); 

                
  /* GPIO P4.1 configuration */
  GPIO_DeInit(GPIO4);
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_1;
  GPIO_InitStructure.GPIO_Direction = GPIO_PinOutput;
  GPIO_InitStructure.GPIO_Type = GPIO_Type_PushPull;
  GPIO_InitStructure.GPIO_Alternate = GPIO_OutputAlt1;
  GPIO_Init(GPIO4,&GPIO_InitStructure);

  /* TIM1 Structure Initialization */
  TIM_StructInit(&TIM_InitStructure);

  /* TIM1 Configuration in Output Compare Mode */
  TIM_DeInit(TIM1);  /* TIM1 Deinitialization */
  TIM_InitStructure.TIM_Mode = TIM_OCM_CHANNEL_1;                           
  TIM_InitStructure.TIM_OC1_Modes = TIM_TIMING;               
  TIM_InitStructure.TIM_Clock_Source = TIM_CLK_APB;         
  TIM_InitStructure.TIM_Clock_Edge = TIM_CLK_EDGE_FALLING;  
  TIM_InitStructure.TIM_Prescaler = 0x20;                  
  TIM_InitStructure.TIM_Pulse_Length_1 = 0x100;          
  TIM_Init (TIM1, &TIM_InitStructure);
  
  /*Enable TIM1 Output Compare1 interrupt*/
  TIM_ITConfig(TIM1, TIM_IT_OC1, ENABLE);
  
  
  /*Configure TIM1 interrupt in VIC*/
  VIC_Config(TIM1_ITLine, VIC_IRQ, 0);
  VIC_ITCmd(TIM1_ITLine, ENABLE);
  
  /* Start the counter of TIM1 */
  TIM_CounterCmd(TIM1, TIM_START);

  while(1);
}


/*******************************************************************************
* Function Name  : SCU_Configuration
* Description    : Configures the Master clock @96MHz and the Main system 
*                  configuration and Clocks (FMI,PLL,RCLK,HCLK,PCLK ,MCLK )
*                  and enable clocks for peripherals.
* Input          : None
* Output         : None
* Return         : None
*******************************************************************************/
void SCU_Configuration(void)
{
  SCU_MCLKSourceConfig(SCU_MCLK_OSC);	/* Default configuration */
  
  /*wait state insertion :This function should be executed from SRAM when*/
  /*booting from bank1 to avoid  Read-While-Write from the Same Bank.*/
  FMI_Config(FMI_READ_WAIT_STATE_2, FMI_WRITE_WAIT_STATE_0, FMI_PWD_ENABLE,\
                 FMI_LVD_ENABLE, FMI_FREQ_HIGH);/*Insert 2 Wait States for read*/
                                                
  SCU_PLLFactorsConfig(192, 25, 2); /* PLL factors Configuration based on*/
                                        /* a OSC/Crystal value = 25Mhz*/     
  SCU_PLLCmd(ENABLE);  /* PLL Enable and wait for Locking*/     
  SCU_RCLKDivisorConfig(SCU_RCLK_Div1); /* RCLK @96Mhz */
  SCU_HCLKDivisorConfig(SCU_HCLK_Div1); /* AHB @96Mhz */
  SCU_FMICLKDivisorConfig(SCU_FMICLK_Div1);/* FMI @96Mhz */
  SCU_PCLKDivisorConfig(SCU_PCLK_Div2); /* APB @48Mhz */
  SCU_MCLKSourceConfig(SCU_MCLK_PLL);  /* MCLK @96Mhz */
  
  SCU_APBPeriphClockConfig(__TIM01, ENABLE); /*Enable the clock for TIM0 and TIM1*/
  SCU_AHBPeriphClockConfig(__VIC,ENABLE);    /*Enable the clock for VIC*/
  SCU_APBPeriphClockConfig(__GPIO4, ENABLE); /* Enable the clock for GPIO4 */
}  
/******************* (C) COPYRIGHT 2007 STMicroelectronics *****END OF FILE****/