david childs / FT800_3

updated for FT810 and 800x480 display

Dependents:   FT810_RGB_demo FT81x_TripComp_test FT810_LoadJPG

Fork of FT800_2 by Peter Drescher

FT_Hal_Utils.cpp@4:363ec27cdfaa, 2014-09-20 (annotated)

Committer:
dreschpe
Date:
Sat Sep 20 11:35:43 2014 +0000
Revision:
4:363ec27cdfaa
Child:
5:c0ffdb08b8a5
change API

Who changed what in which revision?

UserRevisionLine numberNew contents of line
dreschpe 4:363ec27cdfaa 1 #include "FT_Platform.h"
dreschpe 4:363ec27cdfaa 2 #include "mbed.h"
dreschpe 4:363ec27cdfaa 3
dreschpe 4:363ec27cdfaa 4 /* function to load jpg file from filesystem */
dreschpe 4:363ec27cdfaa 5 /* return 0 if jpg is ok */
dreschpe 4:363ec27cdfaa 6 /* return x_size and y_size of jpg */
dreschpe 4:363ec27cdfaa 7
dreschpe 4:363ec27cdfaa 8 int FT800::Load_jpg(char* filename, ft_int16_t* x_size, ft_int16_t* y_size)
dreschpe 4:363ec27cdfaa 9 {
dreschpe 4:363ec27cdfaa 10 unsigned char pbuff[8291];
dreschpe 4:363ec27cdfaa 11 unsigned short marker;
dreschpe 4:363ec27cdfaa 12 unsigned short length;
dreschpe 4:363ec27cdfaa 13 unsigned char data[4];
dreschpe 4:363ec27cdfaa 14
dreschpe 4:363ec27cdfaa 15 ft_uint16_t blocklen;
dreschpe 4:363ec27cdfaa 16
dreschpe 4:363ec27cdfaa 17 FILE *fp = fopen(filename, "r");
dreschpe 4:363ec27cdfaa 18 if(fp == NULL) return (-1); // connot open file
dreschpe 4:363ec27cdfaa 19
dreschpe 4:363ec27cdfaa 20 // search for 0xFFC0 marker
dreschpe 4:363ec27cdfaa 21 fseek(fp, 0, SEEK_END);
dreschpe 4:363ec27cdfaa 22 unsigned int Fsize = ftell(fp);
dreschpe 4:363ec27cdfaa 23 fseek(fp, 2, SEEK_SET);
dreschpe 4:363ec27cdfaa 24 fread(data,4,1,fp);
dreschpe 4:363ec27cdfaa 25 marker = data[0] << 8 | data[1];
dreschpe 4:363ec27cdfaa 26 length = data[2] << 8 | data[3];
dreschpe 4:363ec27cdfaa 27 do {
dreschpe 4:363ec27cdfaa 28 if(marker == 0xFFC0) break;
dreschpe 4:363ec27cdfaa 29 if(marker & 0xFF00 != 0xFF00) break;
dreschpe 4:363ec27cdfaa 30 if (fseek(fp, length - 2,SEEK_CUR) != 0) break;
dreschpe 4:363ec27cdfaa 31 fread(data,4,1,fp);
dreschpe 4:363ec27cdfaa 32 marker = data[0] << 8 | data[1];
dreschpe 4:363ec27cdfaa 33 length = data[2] << 8 | data[3];
dreschpe 4:363ec27cdfaa 34 } while(1);
dreschpe 4:363ec27cdfaa 35 if(marker != 0xFFC0) return (-2); // no FFC0 Marker, wrong format no baseline DCT-based JPEG
dreschpe 4:363ec27cdfaa 36 fseek(fp, 1,SEEK_CUR);
dreschpe 4:363ec27cdfaa 37 fread(data,4,1,fp);
dreschpe 4:363ec27cdfaa 38 *y_size = (data[0] << 8 | data[1]);
dreschpe 4:363ec27cdfaa 39 *x_size = (data[2] << 8 | data[3]);
dreschpe 4:363ec27cdfaa 40
dreschpe 4:363ec27cdfaa 41 //if(*x_size > DispWidth || *y_size > DispHeight) return (-3); // to big to fit on screen
dreschpe 4:363ec27cdfaa 42
dreschpe 4:363ec27cdfaa 43 fseek(fp, 0, SEEK_SET);
dreschpe 4:363ec27cdfaa 44 WrCmd32(CMD_LOADIMAGE); // load a JPEG image
dreschpe 4:363ec27cdfaa 45 WrCmd32(0); //destination address of jpg decode
dreschpe 4:363ec27cdfaa 46 WrCmd32(0); //output format of the bitmap - default is rgb565
dreschpe 4:363ec27cdfaa 47 while(Fsize > 0) {
dreschpe 4:363ec27cdfaa 48 /* download the data into the command buffer by 8kb one shot */
dreschpe 4:363ec27cdfaa 49 blocklen = Fsize>8192?8192:Fsize;
dreschpe 4:363ec27cdfaa 50 /* copy the data into pbuff and then transfter it to command buffer */
dreschpe 4:363ec27cdfaa 51 fread(pbuff,1,blocklen,fp);
dreschpe 4:363ec27cdfaa 52 Fsize -= blocklen;
dreschpe 4:363ec27cdfaa 53 /* copy data continuously into command memory */
dreschpe 4:363ec27cdfaa 54 WrCmdBuf(pbuff, blocklen); //alignment is already taken care by this api
dreschpe 4:363ec27cdfaa 55 }
dreschpe 4:363ec27cdfaa 56 fclose(fp);
dreschpe 4:363ec27cdfaa 57
dreschpe 4:363ec27cdfaa 58 return(0);
dreschpe 4:363ec27cdfaa 59 }
dreschpe 4:363ec27cdfaa 60
dreschpe 4:363ec27cdfaa 61
dreschpe 4:363ec27cdfaa 62 /* calibrate touch */
dreschpe 4:363ec27cdfaa 63 ft_void_t FT800::Calibrate()
dreschpe 4:363ec27cdfaa 64 {
dreschpe 4:363ec27cdfaa 65 /*************************************************************************/
dreschpe 4:363ec27cdfaa 66 /* Below code demonstrates the usage of calibrate function. Calibrate */
dreschpe 4:363ec27cdfaa 67 /* function will wait untill user presses all the three dots. Only way to*/
dreschpe 4:363ec27cdfaa 68 /* come out of this api is to reset the coprocessor bit. */
dreschpe 4:363ec27cdfaa 69 /*************************************************************************/
dreschpe 4:363ec27cdfaa 70 {
dreschpe 4:363ec27cdfaa 71
dreschpe 4:363ec27cdfaa 72 DLstart(); // start a new display command list
dreschpe 4:363ec27cdfaa 73 DL(CLEAR_COLOR_RGB(64,64,64)); // set the clear color R, G, B
dreschpe 4:363ec27cdfaa 74 DL(CLEAR(1,1,1)); // clear buffers -> color buffer,stencil buffer, tag buffer
dreschpe 4:363ec27cdfaa 75 DL(COLOR_RGB(0xff,0xff,0xff)); // set the current color R, G, B
dreschpe 4:363ec27cdfaa 76 Text((DispWidth/2), (DispHeight/2), 27, OPT_CENTER, "Please Tap on the dot"); // draw Text at x,y, font 27, centered
dreschpe 4:363ec27cdfaa 77 Calibrate(0); // start the calibration of touch screen
dreschpe 4:363ec27cdfaa 78 Flush_Co_Buffer(); // download the commands into FT800 FIFO
dreschpe 4:363ec27cdfaa 79 WaitCmdfifo_empty(); // Wait till coprocessor completes the operation
dreschpe 4:363ec27cdfaa 80 }
dreschpe 4:363ec27cdfaa 81 }
dreschpe 4:363ec27cdfaa 82