_SKU_DFR0387_TELEMATICS_LCD_SHIELD_V1.0 - jimaobian/DFRobotWikiCn GitHub Wiki
TELEMATICS LCD扩展板是DFRobot针对MEGA系列主板开发的一款3.5" TFT LCD触摸屏，320*480分辨率，外扩3个串口和一个IIC接口。完美兼容Arduino DUE、Mega1280/2560 和Bluno Mega1280/2560。板载电压切换开关，可手动切换3.3V和5V输出电压，确保两者都能正常使用。此外LCD背面带有一个MicroSD卡槽，可以用来存取数据信息，最大支持32G外置存储卡。 对于Arduino初学者来说，繁琐而复杂的液晶驱动电路连线一直困扰着很多人，一不小心就会连错，每次上电前都要细心检查一遍。而这款极简化的LCD扩展板就能很好的满足这些需求。并且我们提供了各类驱动包，帮助您实现各种功能。
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| 注意：为了避免Due和MEGA两个芯片不同的工作电压而导致驱动液晶背光亮度不同，你可以通过调节D8的PWM而控制液晶背光亮度。 |
- 屏幕尺寸：3.5"
- 分辨率：320x480
- 供电电源：5 V
- 输出电源：3.3/5 V
- 背景光控制方式：PWM (D8，高电平有效)
- 支持MicroSD卡（最大32GB）
- 外扩三个UART扩展接口
- 外扩一个IIC扩展接口
- 兼容Arduino DUE/Mega 1280/2560
- 兼容Bluno Mega 1280/2560
- 支持触摸功能
- 大小：100*57mm
- 重量：70g
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| { | |
| 接口 | 功能描述 |
| IIC接口 | IIC 接口(SDA: 20; SCL: 21) |
| 串口1 | Serial1 |
| 串口2 | Serial2 |
| 串口3 | Serial3 |
| SD接口 | D50->DATA0 |
| D51->CMD | |
| D52->CLK | |
| D53->CD/DATA3 |
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| :注意:
SD接口：箭头方向表示控制连线，而非直接连线
液晶驱动被占用引脚：D2、D3、D4、D5、D6、D8、D22~D41、D50~D53 |
|}
请先下载TELEMATICS LCD SHIELD相关库文件并安装库文件。TELEMATICS 点击下载 将下载的所有库文件安装导入到你的编译器下面，即可使用
功能简述：例程给出来如何初始化LCD，并打印字符串到屏幕上面。用户可以通过setFontSize和setColor函数来修改字符串字体和颜色。
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/*
This code is to teach you how to make the LCD display string with the library.
Maybe you need to set the font size, you can call this function "setFontSize()",and you can pass the parameters :
FONT_SIZE_SMALL
FONT_SIZE_MEDIUM
FONT_SIZE_LARGE
FONT_SIZE_XLARGE
and if you want to change the font color,you can call this function "setColor()" with the parameters:
RGB16_RED-------->RED
RGB16_GREEN------>GREEN
RGB16_BLUE------->BLUE
RGB16_YELLOW----->YELLOW
RGB16_CYAN------->CYAN
RGB16_PINK------->PINK
RGB16_WHITE------>WHITE
Created 2016-4-8
By Andy zhou <[email protected]>
version:V1.0
*/
#include <Arduino.h>
#include <SPI.h>
#include <MultiLCD.h>
LCD_R61581 lcd;
void setup(){
lcd.begin();
lcd.setFontSize(FONT_SIZE_MEDIUM); //set font size
lcd.setColor(RGB16_RED); //set strings color
lcd.println();
lcd.println();
lcd.println("DFRobot!!");
lcd.println("TELEMATICS LCD SHIELD V1.0");
lcd.println();
lcd.setColor(RGB16_WHITE);
}
void loop(){
}
|}
功能简述：在样例代码一的基础上，进一步学习如何使用SD卡库文件。
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/*
/*
This code is to teach you how to use SD library.
Created 2016-4-8
By Andy zhou <[email protected]>
version:V1.0
*/
#include <Arduino.h>
#include <SPI.h>
#include <MultiLCD.h>
#include <SD.h>
#include "datalogger.h"
#define STATE_SD_READY 0x1
#define STATE_OBD_READY 0x2
#define STATE_GPS_CONNECTED 0x4
#define STATE_GPS_READY 0x8
#define STATE_MEMS_READY 0x10
#define STATE_GUI_ON 0x20
LCD_R61581 lcd;
CDataLogger logger;
byte state = 0;
bool checkSD()
{
Sd2Card card;
SdVolume volume;
state &= ~STATE_SD_READY;
pinMode(SS, OUTPUT);
lcd.setFontSize(FONT_SIZE_MEDIUM);
if (card.init(SPI_HALF_SPEED, SD_CS_PIN)) {
const char* type;
switch(card.type()) {
case SD_CARD_TYPE_SD1:
type = "SD1";
break;
case SD_CARD_TYPE_SD2:
type = "SD2";
break;
case SD_CARD_TYPE_SDHC:
type = "SDHC";
break;
default:
type = "SDx";
}
lcd.print(type);
lcd.write(' ');
if (!volume.init(card)) {
lcd.print("No FAT!");
return false;
}
uint32_t volumesize = volume.blocksPerCluster();
volumesize >>= 1; // 512 bytes per block
volumesize *= volume.clusterCount();
volumesize >>= 10;
lcd.print((int)volumesize);
lcd.print("MB");
} else {
lcd.println("No SD Card");
return false;
}
if (!SD.begin(SD_CS_PIN)) {
lcd.println("Bad SD");
return false;
}
state |= STATE_SD_READY;
return true;
}
void setup(){
lcd.begin();
lcd.setFontSize(FONT_SIZE_MEDIUM); //set font size
lcd.setColor(RGB16_RED); //set strings color
lcd.println();
lcd.println();
lcd.println("DFRobot!!!");
lcd.println("TELEMATICS LCD SHIELD V1.0");
lcd.println();
lcd.setColor(RGB16_WHITE);
if (checkSD()) {
uint16_t index = logger.openFile();
lcd.println();
if (index > 0) {
lcd.print("File ID:");
lcd.println(index);
} else {
lcd.print("No File");
}
}
}
void loop(){
}
|}
功能简述：主要是实现触摸功能
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#include <Arduino.h>
#include <SPI.h>
#include <MultiLCD.h>
#include "touch.h"
LCD_R61581 lcd;
void setup(){
lcd.begin();
lcd.setFontSize(FONT_SIZE_MEDIUM); //set font size
lcd.setColor(RGB16_YELLOW); //set strings color
lcd.println("DFRobot");
lcd.println("TELEMATICS LCD SHIELD V1.0");
lcd.println();
lcd.setColor(RGB16_WHITE);
touch.init();
}
void loop(){
lcd.setCursor(0, 8);
int x, y;
if ( touch.read(x, y) ){
lcd.print("X:");
lcd.print(x);
lcd.print(" Y:");
lcd.print(y);
lcd.print(" ");
} else {
lcd.print(" ");
}
}
|}
功能简述：从SD卡中读取一张“ladar.bmp”图片进行显示
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#include <Arduino.h>
#include <SPI.h>
#include <MultiLCD.h>
#include <SD.h>
#include "datalogger.h"
#define STATE_SD_READY 0x1
#define STATE_OBD_READY 0x2
#define STATE_GPS_CONNECTED 0x4
#define STATE_GPS_READY 0x8
#define STATE_MEMS_READY 0x10
#define STATE_GUI_ON 0x20
LCD_R61581 lcd;
CDataLogger logger;
byte state = 0;
// These read 16- and 32-bit types from the SD card file.
// BMP data is stored little-endian, Arduino is little-endian too.
// May need to reverse subscript order if porting elsewhere.
uint16_t read16(File & f) {
uint16_t result;
((uint8_t *)&result)[0] = f.read(); // LSB
((uint8_t *)&result)[1] = f.read(); // MSB
return result;
}
uint32_t read32(File & f) {
uint32_t result;
((uint8_t *)&result)[0] = f.read(); // LSB
((uint8_t *)&result)[1] = f.read();
((uint8_t *)&result)[2] = f.read();
((uint8_t *)&result)[3] = f.read(); // MSB
return result;
}
bool checkSD()
{
Sd2Card card;
SdVolume volume;
state &= ~STATE_SD_READY;
pinMode(SS, OUTPUT);
lcd.setFontSize(FONT_SIZE_MEDIUM);
if (card.init(SPI_FULL_SPEED, SD_CS_PIN)) {
const char* type;
switch(card.type()) {
case SD_CARD_TYPE_SD1:
type = "SD1";
break;
case SD_CARD_TYPE_SD2:
type = "SD2";
break;
case SD_CARD_TYPE_SDHC:
type = "SDHC";
break;
default:
type = "SDx";
}
lcd.print(type);
lcd.write(' ');
if (!volume.init(card)) {
lcd.print("No FAT!");
return false;
}
uint32_t volumesize = volume.blocksPerCluster();
volumesize >>= 1; // 512 bytes per block
volumesize *= volume.clusterCount();
volumesize >>= 10;
lcd.print((int)volumesize);
lcd.print("MB\n");
} else {
lcd.println("No SD Card");
return false;
}
if (!SD.begin(SD_CS_PIN)) {
lcd.println("Bad SD");
return false;
}
state |= STATE_SD_READY;
return true;
}
uint16_t Color565(uint8_t r, uint8_t g, uint8_t b) {
return ((r & 0xF8) << 8) | ((g & 0xFC) << 3) | (b >> 3);
}
#define BUFFPIXEL 20
void bmpDraw(char *fileName, uint16_t x, uint16_t y){
File bmpFile;
int bmpWidth, bmpHeight; // W+H in pixels
uint8_t bmpDepth; // Bit depth (currently must be 24)
uint32_t bmpImageoffset; // Start of image data in file
uint32_t rowSize; // Not always = bmpWidth; may have padding
uint8_t sdbuffer[3*BUFFPIXEL]; // pixel buffer (R+G+B per pixel)
uint8_t buffidx = sizeof(sdbuffer); // Current position in sdbuffer
boolean goodBmp = false; // Set to true on valid header parse
boolean flip = true; // BMP is stored bottom-to-top
int w, h, row, col;
uint8_t r, g, b;
uint32_t pos = 0, startTime = millis();
if((x >= 480) || (y >= 320))
return;
if((bmpFile = SD.open(fileName)) == NULL){
lcd.println("File not found");
return;
}
if(read16(bmpFile) == 0x4d42){
Serial.print("File size:");
Serial.println(read32(bmpFile));
(void)read32(bmpFile);
bmpImageoffset = read32(bmpFile); // Start of image data
Serial.print("Image Offset: ");
Serial.println(bmpImageoffset, DEC);
// Read DIB header
Serial.print("Header size: ");
Serial.println(read32(bmpFile));
bmpWidth = read32(bmpFile);
bmpHeight = read32(bmpFile);
if(read16(bmpFile) == 1){
bmpDepth = read16(bmpFile);
Serial.print("Bit Depth: ");
Serial.println(bmpDepth);
if((bmpDepth == 24) && (read32(bmpFile) == 0)) { // 0 = uncompressed 没有压缩
goodBmp = true; // Supported BMP format -- proceed!
Serial.print("Image size: ");
Serial.print(bmpWidth);
Serial.print('x');
Serial.println(bmpHeight);
// BMP rows are padded (if needed) to 4-byte boundary
rowSize = (bmpWidth * 3 + 3) & ~3;
if(bmpHeight < 0) {
bmpHeight = -bmpHeight;
flip = false;
}
// Crop area to be loaded
w = bmpWidth;
h = bmpHeight;
if((x+w-1) >= 480)
w = 480 - x;
if((y+h-1) >= 320)
h = 320 - y;
for (row=0; row<h; row++) { // For each scanline...
if(flip) // Bitmap is stored bottom-to-top order (normal BMP)
pos = bmpImageoffset + (bmpHeight - 1 - row) * rowSize;
else // Bitmap is stored top-to-bottom
pos = bmpImageoffset + row * rowSize;
if(bmpFile.position() != pos) { // Need seek?
bmpFile.seek(pos);
buffidx = sizeof(sdbuffer); // Force buffer reload
}
for (col=0; col<w; col++) { // For each pixel...
// Time to read more pixel data?
if (buffidx >= sizeof(sdbuffer)) { // Indeed
bmpFile.read(sdbuffer, sizeof(sdbuffer));
buffidx = 0; // Set index to beginning
}
// Convert pixel from BMP to TFT format, push to display
b = sdbuffer[buffidx++];
g = sdbuffer[buffidx++];
r = sdbuffer[buffidx++];
lcd.drawPixel(col + x, row + y, Color565(r,g,b));
} // end pixel
} // end scanline
Serial.print("Loaded in ");
Serial.print(millis() - startTime);
Serial.println(" ms");
}
}
}
bmpFile.close();
if(!goodBmp)
Serial.println("BMP format not recognized.");
}
static uint32_t startTime = 0;
void dataIdleLoop(){
// called while initializing
char buf[10];
unsigned int t = (millis() - startTime) / 1000;
sprintf(buf, "%02u:%02u", t / 60, t % 60);
lcd.setFontSize(FONT_SIZE_XLARGE);
lcd.setColor(RGB16(0,0,0));
lcd.setBackColor(RGB16_WHITE);
lcd.setCursor(0, 0);
lcd.print(buf);
}
void setup(){
Serial.begin(115200);
lcd.begin();
lcd.setBackLight(255);
lcd.setFontSize(FONT_SIZE_MEDIUM); //set font size
lcd.println();
if (checkSD()) {
bmpDraw("ladar.bmp", 0, 0);
}
}
void loop(){
}
|}
| 更多问题及有趣的应用，可以 访问论坛 进行查阅或发帖！ |
问：图片不能正常显示
1.查看图片属性，确保格式为BMP格式。 2.确保文件名正确（有的电脑有后缀名.bmp，有的电脑没有，只需要确保前面的名字就好）
