Nakul Dureja
Mbed_Text_Reader using an SDcard reader, 12-key touch pad and uLCD.
Dependencies: FATFileSystem mbed-rtos mbed
Diff: main.cpp
- Revision:
- 0:6bd0fe190ecc
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp Mon Mar 24 06:45:02 2014 +0000
@@ -0,0 +1,370 @@
+#include <mbed.h>
+#include <string>
+#include <list>
+#include <vector>
+
+#include <mpr121.h> // Touchpad
+#include "SDFileSystem.h" // SD Card
+#include "uLCD_4DGL.h" // uLCD
+
+
+// Global Variables
+int wpm; // Words Per Minute
+int wpmChange;
+int play; // 1 -> Play || 0-> Pause
+int pause; // Slight pause
+int reset; // Reset Flag
+int menuX; // Menu cursor
+int menuY;
+int numFiles; // Number of files in dir
+int fileChoose; // File choose flag
+
+
+
+
+// Setup the Serial to the PC for debugging
+Serial pc(USBTX, USBRX);
+
+
+// ********** LCD **********
+uLCD_4DGL uLCD(p28, p27, p29); // create a global lcd object
+
+
+// ********** Touchpad **********
+
+// Create the interrupt receiver object on pin 26
+InterruptIn interrupt(p26);
+
+// Setup the i2c bus on pins 9 and 10
+I2C i2c(p9, p10);
+
+// Setup the Mpr121:
+// constructor(i2c object, i2c address of the mpr121)
+Mpr121 mpr121(&i2c, Mpr121::ADD_VSS);
+
+void fallInterrupt()
+{
+ double value = mpr121.read(0x00);
+ value +=mpr121.read(0x01)<<8;
+
+ if(value!=0) {
+ int val = log(value)/log(2.0);
+ // uLCD.printf("%i\n",val);
+
+ switch(val) {
+ case 0: // Repeat
+ reset = 1;
+ break;
+ case 2: // Decrease speed
+ if(wpm>100) {
+ wpm -=100;
+ wpmChange = 1;
+ }
+
+ break;
+ case 5: // Down
+
+ if(menuY<numFiles+1)
+ menuY++;
+ break;
+ case 6: // Play/Pause
+ play = (play==0) ? 1 :0;
+ break;
+ case 7: // Up
+
+ if(menuY>2)
+ menuY--;
+ break;
+ case 8: // Enter
+ fileChoose = 1;
+ break;
+ case 10: // Increase Speed
+
+ if(wpm<500) {
+ wpm +=100;
+ wpmChange = 1;
+ }
+
+ break;
+
+ default:
+ break;
+ }
+
+
+ }
+
+}
+
+// ********** SD Card **********
+SDFileSystem sd(p5, p6, p7, p8, "sd");
+
+//read all directory and file names in current directory into filename vector
+vector<string> filenames;
+void read_file_names(char *dir)
+{
+ DIR *dp;
+ struct dirent *dirp;
+ dp = opendir(dir);
+ while((dirp = readdir(dp)) != NULL) {
+ filenames.push_back(string(dirp->d_name));
+ }
+ closedir(dp);
+}
+
+
+// Function to print the words per minute on uLCD
+void printWPM()
+{
+ uLCD.text_width(1);
+ uLCD.text_height(2);
+ uLCD.locate(0,7);
+ uLCD.color(WHITE);
+ uLCD.printf("%i wpm",wpm);
+}
+
+int main()
+{
+
+ // Initializations
+ wpm = 300;
+ play = 1;
+ wpmChange = 0;
+ reset = 0;
+ pause = 0;
+ menuX = 15;
+ menuY = 2;
+ numFiles = 0;
+ fileChoose = 0;
+
+ // Check for input from the touchpad
+ interrupt.mode(PullUp);
+ interrupt.fall(&fallInterrupt);
+
+
+ // Debug in console
+ pc.printf("\nHello World\n\r");
+
+ read_file_names("/sd/mydir");
+ uLCD.color(WHITE);
+ uLCD.printf("/sd/mydir\n\n");
+ uLCD.color(GREEN);
+
+ // Display file names in the menu
+ for(vector<string>::iterator it=filenames.begin(); it < filenames.end(); it++) {
+ uLCD.printf(" - %s\n\r",(*it).c_str());
+ numFiles++;
+ }
+
+ // Choose the file to read
+ while(fileChoose == 0) {
+ uLCD.filled_rectangle(107,0,128,128,BLACK);
+ interrupt.fall(&fallInterrupt);
+ uLCD.locate(menuX,menuY);
+ uLCD.color(BLUE);
+ uLCD.printf("<--");
+ }
+
+ char fn[30] = "";
+ int num = 0;
+ for(vector<string>::iterator it=filenames.begin(); it < filenames.end(); it++) {
+ if(num==(menuY-2))
+ strcpy(fn,(*it).c_str());
+ num++;
+ }
+
+ uLCD.cls();
+
+
+ pc.printf("%s",fn);
+
+ uLCD.text_width(3);
+ uLCD.text_height(3);
+ uLCD.locate(0,1);
+ uLCD.color(WHITE);
+ uLCD.printf("%s",fn);
+ wait(2);
+
+ /*
+
+ // Write to file if needed
+ pc.printf("Start writing\n\r");
+ mkdir("/sd/mydir", 0777);
+
+
+ FILE *fp = fopen("/sd/mydir/sdtest", "w");
+ if(fp == NULL) {
+ error("Could not open file for write\n");
+ }
+
+ fprintf(fp, "This is a demo for our project uLCD Text Reader. You can read at speeds between 100 words per minute to 500 words per minute. ");
+ fprintf(fp, "You can use the MPR121 12-key touch pad to play, pause and reset the text stream. The mbed reads the text file from the microSD card. ");
+ fprintf(fp, "Give it a try: ");
+ fprintf(fp, "3! 2! 1! Go Jackets! ");
+ fprintf(fp, "I'm a Ramblin' Wreck from Georgia Tech, and a hell of an engineer. ");
+ fprintf(fp, "A helluva, helluva, Helluva, helluva, hell of an engineer. ");
+ fprintf(fp, "Like all the jolly good fellows, I drink my whiskey clear. ");
+ fprintf(fp, "I'm a Ramblin' Wreck from Georgia Tech and a hell of an engineer. ");
+
+ fprintf(fp, "Oh! If I had a daughter, sir, I'd dress her in White and Gold, ");
+ fprintf(fp, "And put her on the campus to cheer the brave and bold. ");
+ fprintf(fp, "But if I had a son, sir, I'll tell you what he'd do— ");
+ fprintf(fp, "He would yell, 'To hell with Georgia!' like his daddy used to do. ");
+
+ fprintf(fp, "Oh, I wish I had a barrel of rum and sugar three thousand pounds, ");
+ fprintf(fp, "A college bell to put it in and a clapper to stir it round. ");
+ fprintf(fp, "I'd drink to all the good fellows who come from far and near. ");
+ fprintf(fp, "I'm a ramblin', gamblin', hell of an engineer! ");
+
+
+ fclose(fp);
+ */
+
+ // Open the selected file in read mode
+ char path[] = "/sd/mydir/";
+ strcat(path,fn);
+ pc.printf("Start reading\n\r %s",path);
+
+ FILE *fp1 = fopen(path, "r");
+ if(fp1 == NULL) {
+ error("Could not open file for read\n");
+ }
+
+ // Setup the display on uLCD
+ uLCD.cls();
+ uLCD.line(0, 82, 127, 82, WHITE);
+ uLCD.line(0, 58, 127, 58, WHITE);
+ uLCD.line(62, 54, 62, 62, RED);
+ uLCD.line(63, 54, 63, 62, RED);
+ uLCD.line(62, 80, 62, 88, RED);
+ uLCD.line(63, 80, 63, 88, RED);
+ printWPM();
+
+
+ char oneword[9]; // The current temp word buffer
+ char disp[9]; // The current word
+ int len; // length of the current word
+
+
+ while(1) {
+
+ // Read till the end of the file
+ while(!feof(fp1)) {
+
+ // Reser Mode
+ if(reset == 1) {
+ fclose(fp1);
+ char path[] = "/sd/mydir/";
+ strcat(path,fn);
+ FILE *fp1 = fopen(path, "r");
+
+ if(fp1 == NULL) {
+ pc.printf("Start reading\n\r %s",path);
+ error("Could not open file for read\n");
+ }
+ reset = 0;
+ uLCD.text_width(3);
+ uLCD.text_height(3);
+ uLCD.locate(2,0);
+ uLCD.color(RED);
+ uLCD.printf("<<");
+ wait(0.5);
+ uLCD.filled_rectangle(0,0,128,40,BLACK);
+ }
+
+ // Pause
+ while(play == 0) {
+
+ uLCD.text_width(3);
+ uLCD.text_height(3);
+ uLCD.locate(2,0);
+ uLCD.color(RED);
+ uLCD.printf("||");
+ interrupt.fall(&fallInterrupt);
+ printWPM();
+ if(reset == 1) {
+ fclose(fp1);
+ char path[] = "/sd/mydir/";
+ strcat(path,fn);
+ FILE *fp1 = fopen(path, "r");
+ if(fp1 == NULL) {
+ pc.printf("Start reading\n\r %s",path);
+ error("321Could not open file for read\n");
+ }
+ reset = 0;
+ play = 1;
+ uLCD.text_width(3);
+ uLCD.text_height(3);
+ uLCD.locate(2,0);
+ uLCD.color(RED);
+ uLCD.printf("<<");
+ wait(0.5);
+ uLCD.filled_rectangle(0,0,128,40,BLACK);
+
+
+ }
+ if(play==1) {
+ uLCD.text_width(3);
+ uLCD.text_height(3);
+ uLCD.locate(2,0);
+ uLCD.color(RED);
+ uLCD.printf("> ");
+ wait(0.5);
+ uLCD.filled_rectangle(0,0,128,40,BLACK);
+ }
+ }
+
+ // Change in words per minute
+ if(wpmChange == 1) {
+ printWPM();
+ wpmChange = 0;
+ }
+ uLCD.text_width(2);
+ uLCD.text_height(2);
+ uLCD.color(WHITE);
+ uLCD.locate(0,4);
+
+ // Diplay the current word
+
+ fscanf(fp1, "%s",oneword);
+ len = strlen(oneword);
+ //pc.printf("%i",len);
+
+ for(int i = 0; i< (9-len)/2 ; i++) {
+ disp[i] = ' ';
+ }
+ for(int j = 0 , i = (9-len)/2 ; j< len ; i++) {
+ if(oneword[j] == '.' || oneword[j] == '!' || oneword[j] == ',') {
+ pause = 1;
+ }
+ disp[i] = oneword[j++];
+ }
+
+ for(int i = (9-len)/2 + len ; i<9; i++) {
+ disp[i] = ' ';
+ }
+
+ for(int i=0; i<9; i++) {
+ if(i==4)
+ uLCD.color(RED);
+ else
+ uLCD.color(WHITE);
+ uLCD.printf("%c", disp[i]);
+ }
+
+ // Handle wait time for wpm speed and processing time
+ // Offer slight pause in the sentence to enhance reading
+ float temp = (pause ==1) ? (60.0/(wpm-(0.5*wpm))) : (60.0/wpm);
+ wait(temp - 0.1);
+ pause = 0;
+
+
+
+
+ }
+ fclose(fp1);
+ interrupt.fall(&fallInterrupt);
+ }
+
+
+}
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