//Data：2011-11月

//功能：DA驱动程序，TFT函数的配置

#include "yf_tft.h"
u8 cnt;
ADC_InitTypeDef ADC_InitStructure;
void  ADC_configuration(void);
void  DAC_Configuration(void);
int average_volt(void);
void Delayms(u16 t);
int main(void)
{  float AD_value;
     u16 DAC_data;      int x,y;
     RCC_Configuration();
  ADC_configuration();
  DAC_Configuration();
  ili9320_Initializtion(); //端口引脚初始化
  ili9320_Delay(800000);
  ili9320_Clear(Blue);
  TFT_DrawLine(3,4,3,235,Black);
  TFT_DrawLine(4,4,4,235,Black);
  TFT_DrawLine(2,229,315,229,Black);
  TFT_DrawLine(2,230,315,230,Black);
   TFT_DrawLine(4,4,315,4,Red);
     Display_Grid(Black);
     LCD_showzifustr(100,100,"晶体管特性曲线",Black,Blue);
     while(1)
  {  if(cnt>50) 
   DAC_data=DAC_data+0x00f0;
   DAC_SetChannel2Data(DAC_Align_12b_L, DAC_data); //设置DAC通道1为12位且数据左对齐模式
   DAC_SoftwareTriggerCmd(DAC_Channel_2, ENABLE); //使能DAC通道1的软件触发方式，转换一次
   DAC_SetChannel1Data(DAC_Align_12b_L, DAC_data); //设置DAC通道1为12位且数据左对齐模式
   DAC_SoftwareTriggerCmd(DAC_Channel_1, ENABLE); //使能DAC通道1的软件触发方式，转换一次
   AD_value=average_volt();
   AD_value=AD_value/4095.0*3.3;
   AD_value=AD_value*1000.0;
   Display_variate(60,16,AD_value); 
   x++;
   y=229-AD_value*227/4096;
    if(x>320)
   {  
   x=0;
   ili9320_Clear(Blue);
   Display_Grid(Black);
   TFT_DrawLine(3,4,3,235,Black);
   TFT_DrawLine(4,4,4,235,Black);
   TFT_DrawLine(2,229,315,229,Black);
   TFT_DrawLine(2,230,315,230,Black);
   TFT_DrawLine(4,4,315,4,Red);
    }
         ili9320_SetPoint(x,y,Red);
   Delayms(1);
  }  
}
void RCC_Configuration(void)
{
 
   SystemInit () ;//很重要！！！！
 
   RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA|RCC_APB2Periph_GPIOD|RCC_APB2Periph_GPIOE|RCC_APB2Periph_GPIOC|RCC_APB2Periph_AFIO, ENABLE);
    
  RCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC1 , ENABLE);
   RCC_APB1PeriphClockCmd(RCC_APB1Periph_DAC,ENABLE);
}
  ////////////AD的配置函数/////////////////////////////
void  ADC_configuration()
{
  ADC_InitStructure.ADC_Mode = ADC_Mode_Independent;
  ADC_InitStructure.ADC_ScanConvMode = ENABLE;
  ADC_InitStructure.ADC_ContinuousConvMode = ENABLE;
  ADC_InitStructure.ADC_ExternalTrigConv = ADC_ExternalTrigConv_None;
  ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right;
  ADC_InitStructure.ADC_NbrOfChannel=1;  //指定用于转换的通道数
  ADC_Init(ADC1, &ADC_InitStructure);
  
  ADC_RegularChannelConfig(ADC1, ADC_Channel_14, 1, ADC_SampleTime_55Cycles5);
  
  ADC_Cmd(ADC1, ENABLE);
    
  ADC_ResetCalibration(ADC1);
 
  while(ADC_GetResetCalibrationStatus(ADC1));//等待ADC的校准寄存器被设置完毕
  
  ADC_StartCalibration(ADC1);
 
  while(ADC_GetCalibrationStatus(ADC1));
  
  ADC_SoftwareStartConvCmd(ADC1, ENABLE);
}
////////////AD滤波函数/////////////////////////////
int average_volt()
{  
  u16 sum=0,i,AD_value;
  for(i=0;i<10;i++)
   {
     AD_value=ADC_GetConversionValue(ADC1);
     sum=sum+AD_value; 
   }
     return  sum=sum/i;
}
void DAC_Configuration(void)
{
 DAC_InitTypeDef DAC_InitStructure;
 
 DAC_InitStructure.DAC_Trigger=DAC_Trigger_Software;     //DAC触发方式为软件控制
 DAC_InitStructure.DAC_WaveGeneration=DAC_WaveGeneration_None;    
 //不从DAC端口产生波形
 DAC_InitStructure.DAC_LFSRUnmask_TriangleAmplitude=DAC_LFSRUnmask_Bits8_0; //8位DA波形生成模式
 DAC_InitStructure.DAC_OutputBuffer=DAC_OutputBuffer_Enable;     
 //使能DAC输出缓冲器
 //用上面参数初始化DAC通道1
 DAC_Init(DAC_Channel_1, &DAC_InitStructure); 
 DAC_Cmd(DAC_Channel_1, ENABLE);        //使能DAC通道1
 DAC_Init(DAC_Channel_2, &DAC_InitStructure);    //用上面参数初始化DAC通道1
 DAC_Cmd(DAC_Channel_2, ENABLE);        //使能DAC通道1
}
void Delayms(u16 t)          // Delay Time about 1 ms;
{
    u16 i;
 cnt++;
    do
    {
        for (i=0; i<500; i++);
    }
    while(t--);
}