From d1b70f80180fe4b5ac6078e2be9678fc36d74c5c Mon Sep 17 00:00:00 2001
From: Timothy Pearson <kb9vqf@pearsoncomputing.net>
Date: Mon, 1 Oct 2012 21:07:55 -0500
Subject: Add initial files for direct FPGA programming

---
 fpga/xilinx/programmer/bit2svf/bitshandle.c | 144 ++++++++++++++++++++++++++++
 1 file changed, 144 insertions(+)
 create mode 100644 fpga/xilinx/programmer/bit2svf/bitshandle.c

(limited to 'fpga/xilinx/programmer/bit2svf/bitshandle.c')

diff --git a/fpga/xilinx/programmer/bit2svf/bitshandle.c b/fpga/xilinx/programmer/bit2svf/bitshandle.c
new file mode 100644
index 0000000..7fb2f40
--- /dev/null
+++ b/fpga/xilinx/programmer/bit2svf/bitshandle.c
@@ -0,0 +1,144 @@
+ /**[txh]********************************************************************
+                                                                                
+  Copyright (c) 2005 Juan Pablo D. Borgna <jpborgna en inti gov ar>
+  Copyright (c) 2006-2007 Salvador E. Tropea <salvador en inti gov ar>
+  Copyright (c) 2005-2007 Instituto Nacional de Tecnología Industrial
+  
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; version 2.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program; if not, write to the Free Software
+ Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
+ 02111-1307, USA
+
+  Description: Low level functions to output hexadecimal bitstreams.
+                                                                                
+***************************************************************************/    
+/*****************************************************************************  
+                                                                                
+ Target:      Any                                                               
+ Language:    C
+ Compiler:    gcc 3.3.5 (Debian GNU/Linux)
+ Text editor: SETEdit 0.5.5                                                     
+                                                                                
+*****************************************************************************/  
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include "global.h"
+#include "bitshandle.h"
+
+/* This function returns the inverted bits of its argument */
+unsigned char
+inv_byte(unsigned char b)
+{
+ int i;
+ unsigned char t=0;
+
+ for (i=0;i<7;i++)
+    {
+     t|= (b & 0x01);
+     t = t << 1;
+     b = b >> 1;
+    }
+ t|=b & 0x01;
+ return t;
+}
+
+/* This function is used to generate a string with the hex value of the
+   inverted bits of from */
+void
+pbi(char *to, char *from,long nbytes)
+{
+ int i;
+ int j;
+ char t[]="ZZ";
+ 
+ if (to==NULL) return;
+
+ j=nbytes*2;
+ 
+ for (i=0;i<nbytes;i++)
+    {
+     sprintf(t,"%02x",inv_byte(from[i]));
+     j-=2;
+     to[j]=t[0];
+     to[j+1]=t[1];
+    }
+}
+
+/* This function is used to generate a string with the hex value of the
+   bits of from */
+void
+pb(char *to, char *from,long nbytes)
+{
+ int i;
+ int j;
+ char t[]="ZZ";
+ 
+ if (to==NULL) return;
+
+ j=0;
+ 
+ for (i=0;i<nbytes;i++)
+    {
+     sprintf(t,"%02x",from[i]);
+     j+=2;
+     to[j]=t[0];
+     to[j+1]=t[1];
+    }
+}
+
+/*this function writes bytes to a file with a max nuber of
+  chars per line */ /* it should not be here */
+int
+cutputs(char *string, FILE *fp, long block, int *col)
+{
+ long remaining;
+ long wrote=0l;
+ int c=*col;
+
+ remaining=strlen(string);
+ if (!cutlines)
+   {
+    fwrite(string,1,remaining,fp);
+    col+=remaining;
+    return 0;
+   }
+ if (remaining<block)
+    block=remaining;
+
+ while (remaining)
+      {
+       long to_write=block-c;
+       if (to_write<0) to_write=0;
+       if (to_write & 1) to_write++;
+       wrote=fwrite(string,1,to_write,fp);
+       if (wrote!=to_write)
+         {
+          perror("CUTPUTS");
+          return 1;
+         }
+       c+=wrote;
+       string+=wrote;
+       remaining-=wrote;
+       if (remaining)
+         {
+          fputs("\n",fp);
+          c=0;
+          if (remaining<block)
+             block=remaining;
+         }
+      }
+ *col=c;
+ return 0;
+}
+
-- 
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