Diff: device_depend.cpp

Revision:

6:b9d0d96b052f

Parent:

5:047542b65d00

Child:

7:2a384a077520

diff -r 047542b65d00 -r b9d0d96b052f device_depend.cpp
--- a/device_depend.cpp	Sat Aug 24 07:00:51 2013 +0000
+++ b/device_depend.cpp	Mon Aug 26 15:02:07 2013 +0000
@@ -2,11 +2,18 @@
 #include <string.h>
 #include "device_depend.h"
 
+#define bc_str_length 1024 // from 32 to 1024
+
+
+Serial pc(USBTX, USBRX); // tx, rx
+LocalFileSystem local("local");
+FILE* ReadFile;
+Ticker tick;
 
 volatile static unsigned long msTicks;                            /* counts 1ms timeTicks */
+char bc_str[bc_str_length];
+int last_bc_num = 0;
 
-Serial pc(USBTX, USBRX); // tx, rx
-Ticker tick;
 void hardware_init(void){
 	setup_systick();
 }
@@ -32,6 +39,33 @@
 	//bit = value;
 }
 
+void bytecode_read_init(void){
+
+	if(NULL == (ReadFile = fopen ("/local/Test.cla","rb"))){ uart_print(" ERROR:Can't read class File.\r\n"); while(1); }
+	fseek(ReadFile, 0, SEEK_SET);
+	// I don't know why, but fseek does not work right. So I use fgetc instead.
+	//fgets(bc_str, bc_str_length, ReadFile);
+	printf("loading...");
+	for(int i = 0; i < bc_str_length; i++) bc_str[i] = fgetc(ReadFile);
+	printf("end\r\n");
+	//last_bc_num = bc_str_length;
+}
+
+char* bytecode_read(int bc_num, int length){
+	
+	if((last_bc_num <= bc_num)&&(bc_num < last_bc_num + bc_str_length)&&(length <= bc_str_length)){ // exists data in buffer
+		return &bc_str[bc_num - last_bc_num];
+	}else
+	{
+		fseek(ReadFile, bc_num, SEEK_SET);
+		for(int i = 0; i < bc_str_length; i++)
+		{
+			bc_str[i] = fgetc(ReadFile);
+		}
+		last_bc_num = bc_num;
+	}
+	return bc_str;
+}
 
 /*----------------------------------------------------------------------------
   SysTick_Handler