/******************** (C) COPYRIGHT 2007 STMicroelectronics ********************
* File Name : main.c
* Author : MCD Application Team
* Version : V1.0
* Date : 10/08/2007
* Description : Main program body
********************************************************************************
* 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 "stm32f10x_lib.h"
#include "lcd.h"
/* Private typedef -----------------------------------------------------------*/
/* Private define ------------------------------------------------------------*/
#define ADC1_DR_Address ((u32)0x4001244C)
/* Private macro -------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/
ADC_InitTypeDef ADC_InitStructure;
DMA_InitTypeDef DMA_InitStructure;
vu16 ADC_ConvertedValue;
ErrorStatus HSEStartUpStatus;
/* Private function prototypes -----------------------------------------------*/
void RCC_Configuration(void);
void GPIO_Configuration(void);
void NVIC_Configuration(void);
void SysTick_Config(void);
void LcdShow_Init(void);
/* Private functions ---------------------------------------------------------*/
void delay(void);
void delay()
{
int i,j;
for (i=0; i<0xfffff; i++) j++;
}
char display[4]={0,0};
/*******************************************************************************
* 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();
/* Configure the systick */
SysTick_Config();
LcdShow_Init();
/* DMA channel1 configuration ----------------------------------------------*/
DMA_DeInit(DMA_Channel1);//复位DMA_Channel1
DMA_InitStructure.DMA_PeripheralBaseAddr = ADC1_DR_Address;//外围设备 地址
DMA_InitStructure.DMA_MemoryBaseAddr = (u32)&ADC_ConvertedValue;//memory 地址
DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralSRC;//外围设备 做为源
DMA_InitStructure.DMA_BufferSize = 1;//数据单元尺寸
DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;//外围地址是否自动增长 disable不增长
DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Disable;//memory 是否自动增长
DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_HalfWord;//外围设备寄存器尺寸 16位
DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_HalfWord;//memory 尺寸 16位
DMA_InitStructure.DMA_Mode = DMA_Mode_Circular;//dma 循环模式
DMA_InitStructure.DMA_Priority = DMA_Priority_High;//dma 通道优先级
DMA_InitStructure.DMA_M2M = DMA_M2M_Disable;//memory- to-memory转换
DMA_Init(DMA_Channel1, &DMA_InitStructure);//初始化dma通道1
/* Enable DMA channel1 */
DMA_Cmd(DMA_Channel1, ENABLE);//使能dma通道1
/* ADC1 configuration ------------------------------------------------------*/
ADC_InitStructure.ADC_Mode = ADC_Mode_Independent;//adc 工作模式 adc1 adc2 单独工作
ADC_InitStructure.ADC_ScanConvMode = ENABLE;//是否使能多通道搜索 或单通道
ADC_InitStructure.ADC_ContinuousConvMode = ENABLE;//是否 启动 连续转换模式
ADC_InitStructure.ADC_ExternalTrigConv = ADC_ExternalTrigConv_None;//非外部触发启动转换 软件触发
ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right;//ad转换结果右对齐
ADC_InitStructure.ADC_NbrOfChannel = 1;//adc规则转换通道数量
ADC_Init(ADC1, &ADC_InitStructure);//
/* ADC1 regular channel10 configuration */
ADC_RegularChannelConfig(ADC1, ADC_Channel_10, 1, ADC_SampleTime_55Cycles5);//配置转换规则
//通道adc1 adc通道 规则转换序列号 转换频率
/* Enable ADC1 DMA */
ADC_DMACmd(ADC1, ENABLE);//使能adc1 dma
/* Enable ADC1 */
ADC_Cmd(ADC1, ENABLE);//外围adc1 使能转换
/* Enable ADC1 reset calibaration register */
ADC_ResetCalibration(ADC1);//复位adc1 校准
/* Check the end of ADC1 reset calibration register */
while(ADC_GetResetCalibrationStatus(ADC1));//等待复位完成
/* Start ADC1 calibaration */
ADC_StartCalibration(ADC1);//开始adc1 校准转换
/* Check the end of ADC1 calibration */
while(ADC_GetCalibrationStatus(ADC1));//等待转换完成
/* Start ADC1 Software Conversion */
ADC_SoftwareStartConvCmd(ADC1, ENABLE);//软件使能adc转换
#if 1
while(1)
{
vu16 value = ADC_ConvertedValue;
u8 num1 = value&0xf;
u8 num2 = (value&0xff)>>4;
u8 num3= (value&0xfff)>>8;
u8 num4 = value>>12;
if (num1>9)
display[3]=num1+(65-10);
else
display[3]=num1+(48-0);
if (num2>9)
display[2]=num2+(65-10);
else
display[2]=num2+(48-0);
if (num3>9)
display[1]=num3+(65-10);
else
display[1]=num3+(48-0);
if (num4>9)
display[0]=num4+(65-10);
else
display[0]=num4+(48-0);
write_string(display);
delay();
}
#endif
}
/*******************************************************************************
* 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();//rcc复位
/* Enable HSE */
RCC_HSEConfig(RCC_HSE_ON);//使能hse 外部时钟External High Speed oscillator (HSE).
/* Wait till HSE is ready */
HSEStartUpStatus = RCC_WaitForHSEStartUp();//等待HSE启动
if(HSEStartUpStatus == SUCCESS)//启动成功
{
/* Enable Prefetch Buffer */
FLASH_PrefetchBufferCmd(FLASH_PrefetchBuffer_Enable);//使能flash 时钟欲分频器
/* Flash 2 wait state */
FLASH_SetLatency(FLASH_Latency_2);//flash code潜伏周期 latency FLASH_Latency_2Two Latency cycles.
/* HCLK = SYSCLK */
RCC_HCLKConfig(RCC_SYSCLK_Div1);//配置ahb时钟
/* PCLK2 = HCLK */
RCC_PCLK2Config(RCC_HCLK_Div1);//Configures the High Speed APB clock (PCLK2).
/* PCLK1 = HCLK/2 */
RCC_PCLK1Config(RCC_HCLK_Div2);//Configures the Low Speed APB clock (PCLK1).
/* ADCCLK = PCLK2/4 */
RCC_ADCCLKConfig(RCC_PCLK2_Div4);//Configures the ADC clock (ADCCLK).
/* PLLCLK = 4MHz * 14 = 56 MHz */
RCC_PLLConfig(RCC_PLLSource_HSE_Div1, RCC_PLLMul_14);//Configures the PLL clock source and multiplication factor.
/* Enable PLL */
RCC_PLLCmd(ENABLE);//使能pll
/* Wait till PLL is ready */
while(RCC_GetFlagStatus(RCC_FLAG_PLLRDY) == RESET)//等待pllready
{
}
/* Select PLL as system clock source */
RCC_SYSCLKConfig(RCC_SYSCLKSource_PLLCLK);
/* Wait till PLL is used as system clock source */
while(RCC_GetSYSCLKSource() != 0x08)//0x08: PLL used as system clock
{
}
}
/* Enable peripheral clocks --------------------------------------------------*/
/* Enable DMA clock */
RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA, ENABLE);//使能dma 时钟
/* Enable ADC1 and GPIOC clock */
RCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC1 | RCC_APB2Periph_GPIOC, ENABLE);//使能adc1 时钟
/* Enable GPIOA, GPIOB, GPIOC, GPIOD, GPIOE and AFIO clocks */
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA | RCC_APB2Periph_GPIOB |RCC_APB2Periph_GPIOC
| RCC_APB2Periph_GPIOD | RCC_APB2Periph_GPIOE | RCC_APB2Periph_AFIO, ENABLE);//
/* TIM2 clocks enable */
RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2, 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.00 (ADC Channel10) as analog input -------------------------*/
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0;//端口0
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AIN;//模拟输入
GPIO_Init(GPIOC, &GPIO_InitStructure);//初始化
// for LCD display
/* Configure PE.00 -- PE.15 as Output push-pull : SEG0~15 */
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_All;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOE, &GPIO_InitStructure);
/* Configure PC.04 -- PC.11 as Output push-pull : COM1~4 */
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_8 | GPIO_Pin_9 | GPIO_Pin_10 | GPIO_Pin_11;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOC, &GPIO_InitStructure);
}
/*******************************************************************************
* Function Name : NVIC_Configuration
* Description : Configures Vector Table base location.
* 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
/* Configure the Priority Group to 2 bits */
NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);
/* 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);
/* enabling interrupt */
NVIC_InitStructure.NVIC_IRQChannel=TIM2_IRQChannel;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
/* Configure the SysTick handler priority */
NVIC_SystemHandlerPriorityConfig(SystemHandler_SysTick, 2, 0);
}
void SysTick_Config(void)
{
/* Configure HCLK clock as SysTick clock source */
SysTick_CLKSourceConfig(SysTick_CLKSource_HCLK);//
/* SysTick interrupt each 100 Hz with HCLK equal to 72MHz */
SysTick_SetReload(720000);
/* Enable the SysTick Interrupt */
SysTick_ITConfig(ENABLE);
/* Enable the SysTick Counter */
SysTick_CounterCmd(SysTick_Counter_Enable);
}
void LcdShow_Init(void)
{
TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
TIM_OCInitTypeDef TIM_OCInitStructure;
/* Time base configuration */
TIM_TimeBaseStructure.TIM_Period = 8000;
TIM_TimeBaseStructure.TIM_Prescaler = 17;
TIM_TimeBaseStructure.TIM_ClockDivision = 0x0;
TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
TIM_TimeBaseInit(TIM2, &TIM_TimeBaseStructure);
TIM_ARRPreloadConfig(TIM2,DISABLE);
/* only counter overflow/underflow generate U interrupt */
TIM_UpdateRequestConfig(TIM2,TIM_UpdateSource_Regular);
/* Output Compare Timing Mode configuration: Channel1 */
TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_Timing;
TIM_OCInitStructure.TIM_Channel = TIM_Channel_1;
TIM_OCInitStructure.TIM_Pulse = 4000;
TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High;
TIM_OCInit(TIM2, &TIM_OCInitStructure);
TIM_OC1PreloadConfig(TIM2, TIM_OCPreload_Disable);
/* TIM IT enable */
TIM_ITConfig(TIM2, TIM_IT_CC1 | TIM_IT_Update, ENABLE);
/* TIM2 enable counter */
TIM_Cmd(TIM2, ENABLE);
}
#ifdef DEBUG
/*******************************************************************************
* Function Name : assert_failed
* Description : Reports the name of the source file and the source line number
* where the assert_param error has occurred.
* Input : - file: pointer to the source file name
* - line: assert_param 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
/******************* (C) COPYRIGHT 2007 STMicroelectronics *****END OF FILE****/
点击此处查看原文 >>
系统分类:
单片机 | 用户分类:
无分类
| 来源:
原创