原创 用最新库使智林STM32开发板(之二)----PWM点亮真彩屏背光

2009-4-2 21:48 2260 11 11 分类: MCU/ 嵌入式

点击开大图众所周知智林的板子是不用固件库的,本人想用库行不行,昨天一试还真行,且为最新的库,环境为

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     智林的板子,不用编程序,用设置向导就可以点亮,别外据智林的老大说:他不用库比用库快得多,今天这个程序,我花了好几天,看来智林不用库的还是值得学一下的,智林的板子是在工程中形成的开发板,由其它的开发工具ULINK更是小巧无壳,便于携带.

     智林板子的真彩背光在PA.2上,用TIM2第三道控制,本人只用的二个程序,一个是主程序,一个是中断程序在包括一个编译过的库就运行了,背光老亮了,为这我花了不少心血,真是台上十分钟台下十年功.


/*******************************************************************************
* File Name          : main.c
* Author             : ddllxxrr
* Date First Issued : 08/08/2008
* Description        : Main program body
********************************************************************************/


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


/* Private typedef -----------------------------------------------------------*/
/* Private define ------------------------------------------------------------*/
/* Private macro -------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/
TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
TIM_OCInitTypeDef TIM_OCInitStructure;
vu16 CCR3_Val = 0x500;
ErrorStatus HSEStartUpStatus;


/* Private function prototypes -----------------------------------------------*/
void RCC_Configuration(void);
void GPIO_Configuration(void);
void NVIC_Configuration(void);
   
/* Private functions ---------------------------------------------------------*/


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


/* System Clocks Configuration */
RCC_Configuration();


/* NVIC Configuration */
NVIC_Configuration();

/* GPIO Configuration */
GPIO_Configuration();



/* Time base configuration */
TIM_TimeBaseStructure.TIM_Period = 0xFFFF;         
TIM_TimeBaseStructure.TIM_Prescaler = 0x00;      
TIM_TimeBaseStructure.TIM_ClockDivision = 0x0;   
TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;

TIM_TimeBaseInit(TIM2, &TIM_TimeBaseStructure);


/* Output Compare Toggle Mode configuration: Channel1 */
TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_Toggle;
TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
TIM_OCInitStructure.TIM_Pulse = 64;
TIM_OC3Init(TIM2, &TIM_OCInitStructure);
  
/* TIM enable counter */
TIM_Cmd(TIM2, ENABLE);


/* TIM IT enable */
TIM_ITConfig(TIM2, TIM_IT_CC3 , ENABLE);


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/4 */
    RCC_PCLK1Config(RCC_HCLK_Div4);


    /* 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)
    {
    }
}


/* TIM2 clock enable */
RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2, ENABLE);


/* GPIOA clock enable */
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE);
}


/*******************************************************************************
* Function Name : GPIO_Configuration
* Description    : Configure the TIM2 Pins.
* Input          : None
* Output         : None
* Return         : None
*******************************************************************************/
void GPIO_Configuration(void)
{
GPIO_InitTypeDef GPIO_InitStructure;


/* GPIOA Configuration:TIM2 Channel1, 2, 3 and 4 in Output */
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0 | GPIO_Pin_1 | GPIO_Pin_2 | GPIO_Pin_3;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;


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 the TIM2 global Interrupt */
NVIC_InitStructure.NVIC_IRQChannel = TIM2_IRQChannel;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
}


#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) */


while(1)
{
}
}
#endif
/******************* (C) COPYRIGHT 2007 STMicroelectronics *****END OF FILE****/https://static.assets-stash.eet-china.com/album/old-resources/2009/4/2/9ab53959-d435-4fa1-b2bc-82879a2d123f.rar

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