![](/media/cache/img/default_profile.jpg.50x50_q85.jpg)
This is a code which generates the various zoomed versions of an image stored in an SD card and displays it on a Nokia LCD based on the keys pressed on a capacitive touch pad.
Dependencies: FatFileSystem mbed
Fork of Lab3 by
Diff: main.cpp
- Revision:
- 0:c546b51ecf0b
- Child:
- 1:6048138606a0
diff -r 000000000000 -r c546b51ecf0b main.cpp --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/main.cpp Tue Oct 11 01:24:18 2011 +0000 @@ -0,0 +1,186 @@ +#include "mbed.h" +#include "SDFileSystem.h" +#include "NokiaLCD.h" +#include "myBMP.h" +#include "mpr121.h" +#include "jpegutil.h" +#include <string> +#include <cctype> + +SDFileSystem sd(p5, p6, p7, p8, "sd"); +NokiaLCD lcd(p11, p13, p14, p15, NokiaLCD::LCD6610); +DigitalOut led1(LED1); +DigitalOut led2(LED2); +DigitalOut led3(LED3); +DigitalOut led4(LED4); +InterruptIn interrupt(p26); +I2C i2c(p9,p10); +Mpr121 mpr121(&i2c, Mpr121::ADD_VSS); +Serial pc(USBTX,USBRX); +vector<string> files; +string file; +int selectpos = 1; +int oldvalue; +int value; +bool showingImage = false; +bool displayImage = false; + + +string toLower(string in) +{ + for(int i = 0; i < in.length(); i++) + { + in[i] = tolower(in[i]); + } + return in; +} + +void changepos(int val2,int val1){ //compares the current position with the old one andchanges currsor accordingly. +//val1 is the lower value ond val2 th higher possibla value + +if (!showingImage) { + if (oldvalue==val1) { + if (selectpos != 1) + selectpos--; + // if (selectpos < 1)selectpos = files.size(); // no more raparround + } else if(oldvalue==val2){ + if (selectpos != files.size()) + selectpos++; + //if (selectpos > files.size()) selectpos = 1; // no more raparound + } + } +} + +void fallInterrupt() { + value=mpr121.read(0x00); + value +=mpr121.read(0x01)<<8; + //pc.printf("%d\r\n",value); + switch (value) { + case 0: //no button is pressed (good only to execute actions on release) + switch (oldvalue) { //if not do action according to button realeased. + case (1<<4): + if (showingImage) { + lcd.background(0xFFFFFF); + lcd.foreground(0xFFFFFF); + lcd.cls(); + showingImage = false; + } + break; + + case (1<<5): + if (!showingImage) { + displayImage = true; + showingImage = true; + } + break; + + } + case 1: + changepos(-1,3); //cannot have a lower value as 0 i no button + break; + case 3: + changepos(1,2); + break; + case 2: + changepos((2+1),(2+4)); + break; + case (2+4): + changepos(2,4); + break; + case 4: + changepos((4+2),(4+8)); + break; + case (4+8): + changepos(4,8); + break; + case 8: + changepos(4+8,-1); // cannot have a highe boundry + break; + + default: + + break; + }; + + oldvalue=value; +} + +void ls(char *dir) +{ + DIR *dp; + struct dirent *dirp; + dp = opendir(dir); + while((dirp = readdir(dp)) != NULL) + { + files.push_back(string(dirp->d_name)); + } +} + +int main() { + interrupt.fall(&fallInterrupt); + interrupt.mode(PullUp); + + lcd.background(0xFFFFFF); + lcd.foreground(0xFFFFFF); + lcd.cls(); + ls("/sd"); + + led1 = 1; + + while(1) { + int ypos = 1; + if(displayImage) + { + __disable_irq(); + file = files[selectpos - 1]; + string ext = file.substr(file.rfind('.')+1); + ext = toLower(ext); + if(!ext.compare("bmp")) + { + RGBApixel *Colors = new RGBApixel [2]; + file = "/sd/" + file; + lcd.background(0x000000); + lcd.foreground(0x000000); + lcd.cls(); + ReadBMPFromFile(file.c_str(), Colors, &lcd); + showingImage = true; + } + else if(!ext.compare("jpeg") || !ext.compare("jpg")) + { + file = "/sd/" + file; + lcd.background(0x000000); + lcd.foreground(0x000000); + lcd.cls(); + ReadJPEGFromFile(file.c_str(), &lcd); + showingImage = true; + } + else + { + showingImage = false; + } + displayImage = false; + __enable_irq(); + } + if(!showingImage) + { + lcd.background(0xFFFFFF); + lcd.locate(0,ypos); + for(vector<string>::iterator it=files.begin(); it < files.end(); it++) + { + if(ypos == selectpos) + { + lcd.foreground(0xFF0000); + } + else + { + lcd.foreground(0x000000); + } + lcd.printf("%s",(*it).c_str()); + ypos++; + lcd.locate(0,ypos); + } + } + led1 = !led1; + wait(0.05); + } +}