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authorNicolas Schodet2013-05-01 00:34:39 +0200
committerNicolas Schodet2013-05-01 00:34:39 +0200
commit6ba10be3492959fa052eaa98b2ff0935f09b6d24 (patch)
tree259f184e27253318cedc006fa96f09b00a56e315 /digital/io-hub/src/bootloader/self_programming.cc
parent77e654cec77e28b5cead392ed34457035b5a2481 (diff)
digital/io-hub/src/bootloader: add io-hub-stm32 XMODEM bootloader
Not exactly a bootloader, but a binary image updater, which should be run by main code.
Diffstat (limited to 'digital/io-hub/src/bootloader/self_programming.cc')
-rw-r--r--digital/io-hub/src/bootloader/self_programming.cc59
1 files changed, 59 insertions, 0 deletions
diff --git a/digital/io-hub/src/bootloader/self_programming.cc b/digital/io-hub/src/bootloader/self_programming.cc
new file mode 100644
index 00000000..803e1c7a
--- /dev/null
+++ b/digital/io-hub/src/bootloader/self_programming.cc
@@ -0,0 +1,59 @@
+// io-hub - Modular Input/Output. {{{
+//
+// Copyright (C) 2013 Nicolas Schodet
+//
+// APBTeam:
+// Web: http://apbteam.org/
+// Email: team AT apbteam DOT org
+//
+// 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; either version 2 of the License, or
+// (at your option) any later version.
+//
+// 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.
+//
+// }}}
+#include "self_programming.hh"
+#include <libopencm3/stm32/f4/flash.h>
+
+static const uint32_t sector_addr[] = {
+ // 16 KB
+ 0x8000000, 0x8004000, 0x8008000, 0x800c000,
+ // 64 KB
+ 0x8010000,
+ // 128 KB.
+ 0x8020000, 0x8040000, 0x8060000, 0x8080000, 0x80a0000, 0x80c0000,
+ 0x80e0000, 0x8100000,
+};
+
+static int
+self_programming_sector (uint32_t addr)
+{
+ unsigned i;
+ for (i = 0; i < lengthof (sector_addr); i++)
+ if (addr == sector_addr[i])
+ return i;
+ return -1;
+}
+
+void
+self_programming_write (uint32_t addr, const char *buf, int count)
+{
+ int sector = self_programming_sector (addr);
+ flash_unlock ();
+ if (sector != -1)
+ flash_erase_sector (sector << 3, FLASH_CR_PROGRAM_X32);
+ for (int i = 0; i < count; i += 4)
+ flash_program_word (addr + i, *(uint32_t *) (buf + i),
+ FLASH_CR_PROGRAM_X32);
+ flash_lock ();
+}
+