Diff: FT_Hal_Utils.cpp
- Revision:
- 4:363ec27cdfaa
- Child:
- 5:c0ffdb08b8a5
diff -r 392d2c733c68 -r 363ec27cdfaa FT_Hal_Utils.cpp
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/FT_Hal_Utils.cpp Sat Sep 20 11:35:43 2014 +0000
@@ -0,0 +1,82 @@
+#include "FT_Platform.h"
+#include "mbed.h"
+
+/* function to load jpg file from filesystem */
+/* return 0 if jpg is ok */
+/* return x_size and y_size of jpg */
+
+int FT800::Load_jpg(char* filename, ft_int16_t* x_size, ft_int16_t* y_size)
+{
+ unsigned char pbuff[8291];
+ unsigned short marker;
+ unsigned short length;
+ unsigned char data[4];
+
+ ft_uint16_t blocklen;
+
+ FILE *fp = fopen(filename, "r");
+ if(fp == NULL) return (-1); // connot open file
+
+ // search for 0xFFC0 marker
+ fseek(fp, 0, SEEK_END);
+ unsigned int Fsize = ftell(fp);
+ fseek(fp, 2, SEEK_SET);
+ fread(data,4,1,fp);
+ marker = data[0] << 8 | data[1];
+ length = data[2] << 8 | data[3];
+ do {
+ if(marker == 0xFFC0) break;
+ if(marker & 0xFF00 != 0xFF00) break;
+ if (fseek(fp, length - 2,SEEK_CUR) != 0) break;
+ fread(data,4,1,fp);
+ marker = data[0] << 8 | data[1];
+ length = data[2] << 8 | data[3];
+ } while(1);
+ if(marker != 0xFFC0) return (-2); // no FFC0 Marker, wrong format no baseline DCT-based JPEG
+ fseek(fp, 1,SEEK_CUR);
+ fread(data,4,1,fp);
+ *y_size = (data[0] << 8 | data[1]);
+ *x_size = (data[2] << 8 | data[3]);
+
+ //if(*x_size > DispWidth || *y_size > DispHeight) return (-3); // to big to fit on screen
+
+ fseek(fp, 0, SEEK_SET);
+ WrCmd32(CMD_LOADIMAGE); // load a JPEG image
+ WrCmd32(0); //destination address of jpg decode
+ WrCmd32(0); //output format of the bitmap - default is rgb565
+ while(Fsize > 0) {
+ /* download the data into the command buffer by 8kb one shot */
+ blocklen = Fsize>8192?8192:Fsize;
+ /* copy the data into pbuff and then transfter it to command buffer */
+ fread(pbuff,1,blocklen,fp);
+ Fsize -= blocklen;
+ /* copy data continuously into command memory */
+ WrCmdBuf(pbuff, blocklen); //alignment is already taken care by this api
+ }
+ fclose(fp);
+
+ return(0);
+}
+
+
+/* calibrate touch */
+ft_void_t FT800::Calibrate()
+{
+ /*************************************************************************/
+ /* Below code demonstrates the usage of calibrate function. Calibrate */
+ /* function will wait untill user presses all the three dots. Only way to*/
+ /* come out of this api is to reset the coprocessor bit. */
+ /*************************************************************************/
+ {
+
+ DLstart(); // start a new display command list
+ DL(CLEAR_COLOR_RGB(64,64,64)); // set the clear color R, G, B
+ DL(CLEAR(1,1,1)); // clear buffers -> color buffer,stencil buffer, tag buffer
+ DL(COLOR_RGB(0xff,0xff,0xff)); // set the current color R, G, B
+ Text((DispWidth/2), (DispHeight/2), 27, OPT_CENTER, "Please Tap on the dot"); // draw Text at x,y, font 27, centered
+ Calibrate(0); // start the calibration of touch screen
+ Flush_Co_Buffer(); // download the commands into FT800 FIFO
+ WaitCmdfifo_empty(); // Wait till coprocessor completes the operation
+ }
+}
+