Anna Klaussen / Mbed 2 deprecated DigitalEtchASketch

This project is a DIY mbed version of your favorite childhood game

Dependencies:   mbed 4DGL-uLCD-SE LCD_fonts SDFileSystem MMA8452

SaveFile.cpp@0:bce994168592, 2019-04-14 (annotated)

Committer:
aklaussen
Date:
Sun Apr 14 01:39:35 2019 +0000
Revision:
0:bce994168592
publish working code;

Who changed what in which revision?

UserRevisionLine numberNew contents of line
aklaussen 0:bce994168592 1 #include <vector>
aklaussen 0:bce994168592 2 #include <string>
aklaussen 0:bce994168592 3
aklaussen 0:bce994168592 4
aklaussen 0:bce994168592 5 #include "mbed.h"
aklaussen 0:bce994168592 6 #include "uLCD_4DGL.h"
aklaussen 0:bce994168592 7 #include "SDFileSystem.h"
aklaussen 0:bce994168592 8
aklaussen 0:bce994168592 9 #include "SaveFile.h"
aklaussen 0:bce994168592 10
aklaussen 0:bce994168592 11 extern uLCD_4DGL uLCD;
aklaussen 0:bce994168592 12 extern SDFileSystem sd;
aklaussen 0:bce994168592 13
aklaussen 0:bce994168592 14 int save_image() {
aklaussen 0:bce994168592 15 char fn[100];
aklaussen 0:bce994168592 16 sprintf(fn, "/sd/%d", get_highest_number(read_file_names()));
aklaussen 0:bce994168592 17 FILE *fp = fopen(fn, "wb");
aklaussen 0:bce994168592 18 if (fp == NULL) {
aklaussen 0:bce994168592 19 printf("Couldn't open file");
aklaussen 0:bce994168592 20 return -1;
aklaussen 0:bce994168592 21 }
aklaussen 0:bce994168592 22 printf("Grabbing Pixel Values!");
aklaussen 0:bce994168592 23 int pix_buf[128];
aklaussen 0:bce994168592 24 for (int i = 0; i < 128; i++) {
aklaussen 0:bce994168592 25 for (int j = 0; j < 128; j++) {
aklaussen 0:bce994168592 26 pix_buf[j] = color_convert(uLCD.read_pixel(i,j));
aklaussen 0:bce994168592 27 //printf("Pixel Color is 0x%08x\r\n", color_convert(pix_buf[j]));
aklaussen 0:bce994168592 28 }
aklaussen 0:bce994168592 29 //printf("Writing line %d", i);
aklaussen 0:bce994168592 30 fwrite(pix_buf, sizeof(int), 128, fp);
aklaussen 0:bce994168592 31 }
aklaussen 0:bce994168592 32 fclose(fp);
aklaussen 0:bce994168592 33 return 0;
aklaussen 0:bce994168592 34 }
aklaussen 0:bce994168592 35
aklaussen 0:bce994168592 36 int read_image(const char* fn) {
aklaussen 0:bce994168592 37 FILE * fp = fopen(fn, "rb");
aklaussen 0:bce994168592 38 if (fp == NULL)
aklaussen 0:bce994168592 39 return -1;
aklaussen 0:bce994168592 40 int pix = 0;
aklaussen 0:bce994168592 41 for (int i = 0; i < 128; i++) {
aklaussen 0:bce994168592 42 for (int j = 0; j < 128; j++) {
aklaussen 0:bce994168592 43 fread(&pix, sizeof(int), 1, fp);
aklaussen 0:bce994168592 44 uLCD.pixel(i, j, pix);
aklaussen 0:bce994168592 45 }
aklaussen 0:bce994168592 46 }
aklaussen 0:bce994168592 47
aklaussen 0:bce994168592 48 return 0;
aklaussen 0:bce994168592 49 }
aklaussen 0:bce994168592 50
aklaussen 0:bce994168592 51 int color_convert(int pixel) {
aklaussen 0:bce994168592 52 int red_mask = 0xF800;
aklaussen 0:bce994168592 53 int green_mask = 0x7E0;
aklaussen 0:bce994168592 54 int blue_mask = 0x1F;
aklaussen 0:bce994168592 55 int red_value = (pixel & red_mask) >> 11;
aklaussen 0:bce994168592 56 int green_value = (pixel & green_mask) >> 5;
aklaussen 0:bce994168592 57 int blue_value = (pixel & blue_mask);
aklaussen 0:bce994168592 58 // Expand to 8-bit values.
aklaussen 0:bce994168592 59 int red = red_value << 3;
aklaussen 0:bce994168592 60 int green = green_value << 2;
aklaussen 0:bce994168592 61 int blue = blue_value << 3;
aklaussen 0:bce994168592 62 int color = (red << 16) | (green << 8) | (blue);
aklaussen 0:bce994168592 63 return color;
aklaussen 0:bce994168592 64 }
aklaussen 0:bce994168592 65 std::vector<std::string> read_file_names()
aklaussen 0:bce994168592 66 {
aklaussen 0:bce994168592 67 char* dir = "/sd/";
aklaussen 0:bce994168592 68 DIR *dp;
aklaussen 0:bce994168592 69 struct dirent *dirp;
aklaussen 0:bce994168592 70 dp = opendir(dir);
aklaussen 0:bce994168592 71 //read all directory and file names in current directory into filename vector
aklaussen 0:bce994168592 72 std::vector<std::string> filenames;
aklaussen 0:bce994168592 73 while((dirp = readdir(dp)) != NULL) {
aklaussen 0:bce994168592 74 filenames.push_back(string(dirp->d_name));
aklaussen 0:bce994168592 75 }
aklaussen 0:bce994168592 76 closedir(dp);
aklaussen 0:bce994168592 77 return filenames;
aklaussen 0:bce994168592 78 }
aklaussen 0:bce994168592 79 int get_highest_number (std::vector<std::string> filenames) {
aklaussen 0:bce994168592 80 return filenames.size();
aklaussen 0:bce994168592 81 }