Merge branch 'good_stuff' into mb_eeprom

Conflicts:
	firmware/fx2/include

1 files changed, 65 insertions, 0 deletions

diff --git a/firmware/fx2/usrp1/eeprom_io.c b/firmware/fx2/usrp1/eeprom_io.c
new file mode 100644
index 000000000..9eeb53636
--- /dev/null
+++ b/firmware/fx2/usrp1/eeprom_io.c
@@ -0,0 +1,65 @@
+/* -*- c++ -*- */
+/*
+ * Copyright 2006 Free Software Foundation, Inc.
+ * 
+ * This file is part of GNU Radio
+ * 
+ * GNU Radio 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; either version 3, or (at your option)
+ * any later version.
+ * 
+ * GNU Radio 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 GNU Radio; see the file COPYING.  If not, write to
+ * the Free Software Foundation, Inc., 51 Franklin Street,
+ * Boston, MA 02110-1301, USA.
+ */
+
+#include "eeprom_io.h"
+#include "i2c.h"
+#include "delay.h"
+
+// returns non-zero if successful, else 0
+unsigned char
+eeprom_read (unsigned char i2c_addr, unsigned char eeprom_offset,
+	     xdata unsigned char *buf, unsigned char len)
+{
+  // We setup a random read by first doing a "zero byte write".
+  // Writes carry an address.  Reads use an implicit address.
+
+  static xdata unsigned char cmd[1];
+  cmd[0] = eeprom_offset;
+  if (!i2c_write(i2c_addr, cmd, 1))
+    return 0;
+
+  return i2c_read(i2c_addr, buf, len);
+}
+
+
+#if 0
+
+// returns non-zero if successful, else 0
+unsigned char
+eeprom_write (unsigned char i2c_addr, unsigned char eeprom_offset,
+	      const xdata unsigned char *buf, unsigned char len)
+{
+  static xdata unsigned char cmd[2];
+  unsigned char ok;
+
+  while (len-- > 0){
+    cmd[0] = eeprom_offset++;
+    cmd[1] = *buf++;
+    ok = i2c_write(i2c_addr, cmd, 2);
+    mdelay(10);		// delay 10ms worst case write time
+    if (!ok)
+      return 0;
+  }
+  return 1;
+}
+
+#endif