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本程序?qū)崿F(xiàn)了LTDC液晶對(duì)ADC采集到的數(shù)據(jù)進(jìn)行顯示，并通過(guò)LCD分層顯示心電波形，正弦波，方波，三角波等等。程序簡(jiǎn)單明了，幾個(gè)函數(shù)就可以輕松應(yīng)用STM32F429 Discovery的高級(jí)LTDC液晶分層顯示功能，圖文并茂如下：
主程序預(yù)覽：- //------------------------------------------------------------------------------
- //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?qū)崿F(xiàn)了ADC_DMA模數(shù)轉(zhuǎn)換功能，并通過(guò)LCD顯示電壓值，畫(huà)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(kāi)ADC3，DMA2，GPIO時(shí)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(huán)
- //------------------------------------------------------------------------------
- static void ADCValueDisplay_MainLoop(void)
- {
- uint32_t uwVoltage =0, uwMVoltage=0;
- uint8_t aTextBuffer[50];
- //把ADC采樣值轉(zhuǎn)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(huán)
- //------------------------------------------------------------------------------
- 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(shè)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(shè)置為前景顯示層
- LCD_SetTransparency(120); //前景層透明度
- LCD_Clear( LCD_COLOR_BLACK );
- }
- //------------------------------------------------------------------------------
- //主函數(shù)
- //------------------------------------------------------------------------------
- int main(void)
- {
-
-
- LCD_Init(); //LCD初始化
- LCD_LayerInit(); //LCD層次顯示初始化
-
- LTDC_Cmd(ENABLE); //打開(kāi)LTDC
-
- LCD_GUIDisplay();
-
- ADC3_CH13_DMA_Config(); //配置ADC3
- ADC_SoftwareStartConv(ADC3); //開(kāi)始ADC轉(zhuǎn)換
- while(1)
- {
- ADCValueDisplay_MainLoop(); //顯示電壓值
- ADCWaveformDisp_MainLoop(); //波形顯示
- }
- }
工程文件如下：
LTDC_Display.7z
(328.94 KB, 下載次數(shù): 354)
2021-8-24 17:10 上傳
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