Hiroshi Narimatsu / Mbed 2 deprecated Nucleo_Pic_Viewer

This program show jpeg file in microSD card, run on Nucleo and Aitendo 2.4 inch TFT shield.

Dependencies:   AitendoTFT SDFileSystem TinyJpgDec mbed

Fork of SDFileSystem_HelloWorld by mbed official

main.cpp@1:28ab8d9ab8e4, 2014-04-30 (annotated)

Committer:
h_nari
Date:
Wed Apr 30 08:07:51 2014 +0000
Revision:
1:28ab8d9ab8e4
Parent:
0:bdbd3d6fc5d5 
First Version

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 0:bdbd3d6fc5d5 1 #include "mbed.h"
mbed_official 0:bdbd3d6fc5d5 2 #include "SDFileSystem.h"
h_nari 1:28ab8d9ab8e4 3 #include "AitendoTFT.h"
h_nari 1:28ab8d9ab8e4 4 #include "TinyJpgDec.h"
h_nari 1:28ab8d9ab8e4 5
h_nari 1:28ab8d9ab8e4 6 AitendoTFT tft;
h_nari 1:28ab8d9ab8e4 7 SDFileSystem sd(SPI_MOSI, SPI_MISO, SPI_SCK, SPI_CS, "sd"); // the pinout on the mbed Cool Components workshop board
h_nari 1:28ab8d9ab8e4 8
h_nari 1:28ab8d9ab8e4 9 JDEC jdec;
h_nari 1:28ab8d9ab8e4 10 WORD work[3100/sizeof(WORD)];
h_nari 1:28ab8d9ab8e4 11 FileHandle *fh;
h_nari 1:28ab8d9ab8e4 12
h_nari 1:28ab8d9ab8e4 13 UINT jpeg_input_func(JDEC *jd, BYTE *buff, UINT ndata)
h_nari 1:28ab8d9ab8e4 14 {
h_nari 1:28ab8d9ab8e4 15 if(buff) {
h_nari 1:28ab8d9ab8e4 16 size_t n = fh->read(buff, ndata);
h_nari 1:28ab8d9ab8e4 17 return n == (size_t)-1 ? 0 : n;
h_nari 1:28ab8d9ab8e4 18 } else {
h_nari 1:28ab8d9ab8e4 19 off_t t = fh->lseek( ndata, SEEK_CUR);
h_nari 1:28ab8d9ab8e4 20 return t == (off_t)-1 ? 0 : ndata;
mbed_official 0:bdbd3d6fc5d5 21 }
h_nari 1:28ab8d9ab8e4 22 }
h_nari 1:28ab8d9ab8e4 23
h_nari 1:28ab8d9ab8e4 24 UINT jpeg_output_func(JDEC *jd, void *bitmap, JRECT *rect)
h_nari 1:28ab8d9ab8e4 25 {
h_nari 1:28ab8d9ab8e4 26 WORD *src = (WORD *)bitmap;
h_nari 1:28ab8d9ab8e4 27 int x0 = rect->left;
h_nari 1:28ab8d9ab8e4 28 int x1 = rect->right;
h_nari 1:28ab8d9ab8e4 29 int y0 = rect->top;
h_nari 1:28ab8d9ab8e4 30 int y1 = rect->bottom;
h_nari 1:28ab8d9ab8e4 31 int w = x1 - x0 + 1;
h_nari 1:28ab8d9ab8e4 32
h_nari 1:28ab8d9ab8e4 33 if(y0 >= AitendoTFT::TFT_HEIGHT ||x0 >= AitendoTFT::TFT_WIDTH)
h_nari 1:28ab8d9ab8e4 34 return 1;
h_nari 1:28ab8d9ab8e4 35
h_nari 1:28ab8d9ab8e4 36 if(x1 > AitendoTFT::TFT_WIDTH-1) x1 = AitendoTFT::TFT_WIDTH - 1;
h_nari 1:28ab8d9ab8e4 37 if(y1 > AitendoTFT::TFT_HEIGHT-1) y1 = AitendoTFT::TFT_HEIGHT - 1;
h_nari 1:28ab8d9ab8e4 38
h_nari 1:28ab8d9ab8e4 39 if(x0 == 0)
h_nari 1:28ab8d9ab8e4 40 printf("\r %d", y0);
h_nari 1:28ab8d9ab8e4 41
h_nari 1:28ab8d9ab8e4 42 for(int y= y0; y <= y1; y++) {
h_nari 1:28ab8d9ab8e4 43 tft.setPos(x0, y);
h_nari 1:28ab8d9ab8e4 44 WORD *p = src + w * (y - y0);
h_nari 1:28ab8d9ab8e4 45 for(int x=x0; x <= x1; x++)
h_nari 1:28ab8d9ab8e4 46 tft.put(*p++);
h_nari 1:28ab8d9ab8e4 47 }
h_nari 1:28ab8d9ab8e4 48 return 1;
mbed_official 0:bdbd3d6fc5d5 49 }
h_nari 1:28ab8d9ab8e4 50
h_nari 1:28ab8d9ab8e4 51 int main()
h_nari 1:28ab8d9ab8e4 52 {
h_nari 1:28ab8d9ab8e4 53 JRESULT r;
h_nari 1:28ab8d9ab8e4 54 int cFile;
h_nari 1:28ab8d9ab8e4 55 char path[80];
h_nari 1:28ab8d9ab8e4 56
h_nari 1:28ab8d9ab8e4 57
h_nari 1:28ab8d9ab8e4 58 printf("Nucleo Picture Viewer\n");
h_nari 1:28ab8d9ab8e4 59
h_nari 1:28ab8d9ab8e4 60 while(1) {
h_nari 1:28ab8d9ab8e4 61 cFile = 0;
h_nari 1:28ab8d9ab8e4 62 DirHandle *dh = sd.opendir("/images");
h_nari 1:28ab8d9ab8e4 63 if(dh == NULL)
h_nari 1:28ab8d9ab8e4 64 error("/images not found.\n");
h_nari 1:28ab8d9ab8e4 65 else {
h_nari 1:28ab8d9ab8e4 66 while(1) {
h_nari 1:28ab8d9ab8e4 67 struct dirent *de = dh->readdir();
h_nari 1:28ab8d9ab8e4 68 if(de == NULL) break;
h_nari 1:28ab8d9ab8e4 69 char *ext = strrchr(de->d_name,'.');
h_nari 1:28ab8d9ab8e4 70 if(ext == NULL || strcmp(ext,".jpg")!=0) continue;
h_nari 1:28ab8d9ab8e4 71 cFile++;
h_nari 1:28ab8d9ab8e4 72 snprintf(path, sizeof path, "images/%s", de->d_name);
h_nari 1:28ab8d9ab8e4 73 printf("\nshow %s\n", path);
h_nari 1:28ab8d9ab8e4 74 fh = sd.open(path, 0);
h_nari 1:28ab8d9ab8e4 75 if(fh == NULL) error("%s not found.",path);
h_nari 1:28ab8d9ab8e4 76
h_nari 1:28ab8d9ab8e4 77 r = jd_prepare(&jdec, jpeg_input_func, work, sizeof work, fh);
h_nari 1:28ab8d9ab8e4 78 if(r != JDR_OK) error("jd_prepare error:%d", r);
h_nari 1:28ab8d9ab8e4 79 r = jd_decomp(&jdec, jpeg_output_func, 0);
h_nari 1:28ab8d9ab8e4 80 fh->close();
h_nari 1:28ab8d9ab8e4 81 if( r != JDR_OK) error("jd_decomp error:%d", r);
h_nari 1:28ab8d9ab8e4 82 wait(10);
h_nari 1:28ab8d9ab8e4 83 }
h_nari 1:28ab8d9ab8e4 84 dh->closedir();
h_nari 1:28ab8d9ab8e4 85 }
h_nari 1:28ab8d9ab8e4 86 if(cFile == 0) error("no .jpg file found in /images");
h_nari 1:28ab8d9ab8e4 87 }
h_nari 1:28ab8d9ab8e4 88 }