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//------------------------------------------------------------------------------
//工程：LTDC_Display
//作者：xzezhen
//版本：V1.0.0
//日期：2014-06-06
//工具：Keil MDK 4.72a
//描述：程序實現了ADC_DMA模數轉換功能，并通過LCD顯示電壓值，畫出電壓波形。
//------------------------------------------------------------------------------
#include "Com.h"
#define MESSAGE1 " ECG Waveform "
#define MESSAGE1_1 " Display "
#define MESSAGE2 "ADC Value:"
#define MESSAGE5 " ADC3=%d.%1d V "
#define LINENUM 0x15
#define ADC3_DR_ADDRESS ((uint32_t)0x4001224C)
__IO uint16_t uhADC3ConvertedValue = 0;
__IO uint32_t uwADC3ConvertedVoltage = 0;
static uint16_t Xpos=6,Ypos1=249,Ypos2=249,Xpos1=6,Xpos2=6;
static uint16_t DrawData;
static uint16_t Counter=0;
//------------------------------------------------------------------------------
//ADC3通道13 DMA配置
//------------------------------------------------------------------------------
static void ADC3_CH13_DMA_Config(void)
{
ADC_InitTypeDef ADC_InitStructure;
ADC_CommonInitTypeDef ADC_CommonInitStructure;
DMA_InitTypeDef DMA_InitStructure;
GPIO_InitTypeDef GPIO_InitStructure;
//打開ADC3，DMA2，GPIO時鐘
RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_DMA2 | RCC_AHB1Periph_GPIOC, ENABLE);
RCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC3, ENABLE);
DMA_InitStructure.DMA_Channel = DMA_Channel_2;
DMA_InitStructure.DMA_PeripheralBaseAddr = (uint32_t)ADC3_DR_ADDRESS;
DMA_InitStructure.DMA_Memory0BaseAddr = (uint32_t)&uhADC3ConvertedValue;
DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralToMemory;
DMA_InitStructure.DMA_BufferSize = 1;
DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;
DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Disable;
DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_HalfWord;
DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_HalfWord;
DMA_InitStructure.DMA_Mode = DMA_Mode_Circular;
DMA_InitStructure.DMA_Priority = DMA_Priority_High;
DMA_InitStructure.DMA_FIFOMode = DMA_FIFOMode_Disable;
DMA_InitStructure.DMA_FIFOThreshold = DMA_FIFOThreshold_HalfFull;
DMA_InitStructure.DMA_MemoryBurst = DMA_MemoryBurst_Single;
DMA_InitStructure.DMA_PeripheralBurst = DMA_PeripheralBurst_Single;
DMA_Init(DMA2_Stream0, &DMA_InitStructure);
DMA_Cmd(DMA2_Stream0, ENABLE);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_3;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AN;
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL ;
GPIO_Init(GPIOC, &GPIO_InitStructure);
ADC_CommonInitStructure.ADC_Mode = ADC_Mode_Independent;
ADC_CommonInitStructure.ADC_Prescaler = ADC_Prescaler_Div2;
ADC_CommonInitStructure.ADC_DMAAccessMode = ADC_DMAAccessMode_Disabled;
ADC_CommonInitStructure.ADC_TwoSamplingDelay = ADC_TwoSamplingDelay_5Cycles;
ADC_CommonInit(&ADC_CommonInitStructure);
ADC_InitStructure.ADC_Resolution = ADC_Resolution_12b;
ADC_InitStructure.ADC_ScanConvMode = DISABLE;
ADC_InitStructure.ADC_ContinuousConvMode = ENABLE;
ADC_InitStructure.ADC_ExternalTrigConvEdge = ADC_ExternalTrigConvEdge_None;
ADC_InitStructure.ADC_ExternalTrigConv = ADC_ExternalTrigConv_T1_CC1;
ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right;
ADC_InitStructure.ADC_NbrOfConversion = 1;
ADC_Init(ADC3, &ADC_InitStructure);
ADC_RegularChannelConfig(ADC3, ADC_Channel_13, 1, ADC_SampleTime_3Cycles);
ADC_DMARequestAfterLastTransferCmd(ADC3, ENABLE);
ADC_DMACmd(ADC3, ENABLE);
ADC_Cmd(ADC3, ENABLE);
}
//------------------------------------------------------------------------------
//LCD顯示電壓值主循環
//------------------------------------------------------------------------------
static void ADCValueDisplay_MainLoop(void)
{
uint32_t uwVoltage =0, uwMVoltage=0;
uint8_t aTextBuffer[50];
//把ADC采樣值轉換成電壓值
uwADC3ConvertedVoltage = uhADC3ConvertedValue *3000/0xFFF;
LCD_SetLayer(LCD_BACKGROUND_LAYER);
LCD_SetBackColor(((220>>3)<<11)|((220>>2)<<5)|(220>>3));
LCD_SetTextColor( LCD_COLOR_BLUE );
uwVoltage = (uwADC3ConvertedVoltage)/1000;
uwMVoltage = (uwADC3ConvertedVoltage%1000)/100;
sprintf((char*)aTextBuffer, MESSAGE5, uwVoltage, uwMVoltage);
LCD_DisplayStringLine(LCD_LINE_12, (uint8_t*)aTextBuffer);
LCD_SetLayer(LCD_FOREGROUND_LAYER);
}
//------------------------------------------------------------------------------
//電壓波形顯示主循環
//------------------------------------------------------------------------------
static void ADCWaveformDisp_MainLoop(void)
{
DrawData = uhADC3ConvertedValue*(178.0/0xFFF);
if( ++Counter == 4 )
{
Counter = 0;
LCD_SetTextColor( LCD_COLOR_BLACK );
LCD_DrawFullRect( Xpos+1, 50, 2, 218);
LCD_SetTextColor( LCD_COLOR_GREEN );
Xpos=Xpos+1;
if(Xpos>232)
{
Xpos=6;
LCD_SetTextColor( LCD_COLOR_BLACK );
LCD_DrawLine( Xpos, 50, 218, LCD_DIR_VERTICAL);
LCD_SetTextColor( LCD_COLOR_GREEN );
}
Xpos2=Xpos2+1;
Ypos2=249-DrawData;
if(Xpos2>232)
{
Xpos2=6;Xpos1=6;
}
LCD_DrawUniLine( Xpos1, Ypos1, Xpos2, Ypos2);
Xpos1=Xpos2;
Ypos1=Ypos2;
}
}
//------------------------------------------------------------------------------
//界面初始化顯示
//------------------------------------------------------------------------------
static void LCD_GUIDisplay(void)
{
uint16_t i;
LCD_SetLayer(LCD_BACKGROUND_LAYER); //設置為背景層
LCD_SetTransparency(255); //背景層透明度
LCD_Clear( ((220>>3)<<11)|((220>>2)<<5)|(220>>3) ); //把LCD清除為指定顏色
LCD_SetBackColor(LCD_COLOR_BLUE);
LCD_SetTextColor(LCD_COLOR_BLACK);
LCD_DrawFullRect(5, 49, 229, 219);
LCD_SetTextColor( ((180>>3)<<11)|((180>>2)<<5)|(180>>3) );
LCD_DrawRect( 5, 49, 219, 229);
LCD_SetTextColor( ((180>>3)<<11)|((180>>2)<<5)|(180>>3) );
LCD_DrawUniLine( 4, 48, 234, 48);
LCD_DrawUniLine( 4, 48, 4, 268);
LCD_SetTextColor( ((128>>3)<<11)|((128>>2)<<5)|(128>>3) );
LCD_DrawUniLine( 5, 49, 233, 49);
LCD_DrawUniLine( 5, 49, 5, 267);
LCD_SetTextColor( 0XFFFF );
LCD_DrawUniLine( 235, 49, 235, 269);
LCD_DrawUniLine( 5, 269, 235, 269);
LCD_SetTextColor( ((30>>3)<<11)|((30>>2)<<5)|(30>>3) );
for( i=69; i<269; i+=20 )
LCD_DrawUniLine( 6, i, 233, i);
for( i=44; i<233; i+=38 )
LCD_DrawUniLine( i, 50, i, 267);
LCD_SetBackColor(((220>>3)<<11)|((220>>2)<<5)|(220>>3));
LCD_SetTextColor(LCD_COLOR_BLUE);
LCD_SetFont(&Font16x24);
LCD_DisplayStringLine(LCD_LINE_0, (uint8_t*)MESSAGE1);
LCD_DisplayStringLine(LCD_LINE_1, (uint8_t*)MESSAGE1_1);
LCD_SetLayer(LCD_FOREGROUND_LAYER); //把LCD設置為前景顯示層
LCD_SetTransparency(120); //前景層透明度
LCD_Clear( LCD_COLOR_BLACK );
}
//------------------------------------------------------------------------------
//主函數
//------------------------------------------------------------------------------
int main(void)
{
LCD_Init(); //LCD初始化
LCD_LayerInit(); //LCD層次顯示初始化
LTDC_Cmd(ENABLE); //打開LTDC
LCD_GUIDisplay();
ADC3_CH13_DMA_Config(); //配置ADC3
ADC_SoftwareStartConv(ADC3); //開始ADC轉換
while(1)
{
ADCValueDisplay_MainLoop(); //顯示電壓值
ADCWaveformDisp_MainLoop(); //波形顯示
}
}

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