From 0c57c746ccc000b00e29816ee6c58bcb7a18e745 Mon Sep 17 00:00:00 2001
From: Fredrik Thulin <fredrik@thulin.net>
Date: Sat, 16 Jul 2016 15:02:54 +0200
Subject: Use -mmcu=attiny828 instead of -mmcu=avr25.

This fixes building on Ubuntu 16.04 at least.
---
 Makefile | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Makefile b/Makefile
index ec919f8..0bed033 100644
--- a/Makefile
+++ b/Makefile
@@ -1,5 +1,5 @@
 CC = avr-gcc
-CFLAGS = -std=gnu99 -Wpedantic -Wall -Werror -mmcu=avr25 -D__AVR_ATtiny828__
+CFLAGS = -std=gnu99 -Wpedantic -Wall -Werror -mmcu=attiny828 -D__AVR_ATtiny828__
 OBJCOPY = avr-objcopy
 
 all: tamper.hex
-- 
cgit v1.2.3


From 94b848d9dcd6ee0eb7c3eab817ca2c64971b35a3 Mon Sep 17 00:00:00 2001
From: Fredrik Thulin <fredrik@thulin.net>
Date: Sat, 16 Jul 2016 15:03:44 +0200
Subject: mkm_wipe: Toggle CS to conclude spi_set_operation.

---
 tamper.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/tamper.c b/tamper.c
index d1d5c04..9169895 100644
--- a/tamper.c
+++ b/tamper.c
@@ -213,8 +213,12 @@ mkm_wipe()
 
   spi_setup(1);
   mkm_grab();
+
   mkm_chip_select(1);
   spi_set_operation(SPI_OPERATION_SEQUENCE);
+  mkm_chip_select(0);
+
+  mkm_chip_select(1);
   spi_write(SPI_WRITE);
   spi_write(0);                    /* Address, high byte. */
   spi_write(0);                    /* Address, low byte. */
-- 
cgit v1.2.3


From b1abec4fb2478057da8e0e6788b015ce16e4985b Mon Sep 17 00:00:00 2001
From: Fredrik Thulin <fredrik@thulin.net>
Date: Sat, 16 Jul 2016 15:04:09 +0200
Subject: Release MKM to the FPGA on initialization.

---
 tamper.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/tamper.c b/tamper.c
index 9169895..e3d12af 100644
--- a/tamper.c
+++ b/tamper.c
@@ -254,6 +254,8 @@ main()
   for (int i = 0; i < 16000; i++);
   AVR_LED_PORT &= ~0x0f;
 
+  mkm_release();
+
   while (1)
     {
       if (panic_p())
-- 
cgit v1.2.3


From 574aea07d7d0eeddae965a80d9f1e6a3a42f2645 Mon Sep 17 00:00:00 2001
From: Fredrik Thulin <fredrik@thulin.net>
Date: Sat, 16 Jul 2016 15:05:23 +0200
Subject: The sleep mode seems to not work yet.

It seems the AVR reboots on exiting sleep mode.
---
 tamper.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/tamper.c b/tamper.c
index e3d12af..e2b2127 100644
--- a/tamper.c
+++ b/tamper.c
@@ -261,8 +261,12 @@ main()
       if (panic_p())
         mkm_wipe();
 
-      if (!panic_p())
-        sleep();
+      /* Sleep is not working right at the moment (the AVR seems to be reset
+	 when brought out of sleep mode by a press on the panic button).
+
+	 if (!panic_p())
+	   sleep();
+      */
     }
 
   return 0;
-- 
cgit v1.2.3


From ec079fc63e74e90fe7a159d2e06a7c4cb17fe6b2 Mon Sep 17 00:00:00 2001
From: Fredrik Thulin <fredrik@thulin.net>
Date: Sat, 16 Jul 2016 15:05:49 +0200
Subject: Flash blue LED to indicate MKM wipe completed.

---
 tamper.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/tamper.c b/tamper.c
index e2b2127..477198e 100644
--- a/tamper.c
+++ b/tamper.c
@@ -225,10 +225,17 @@ mkm_wipe()
   for (int i = 0; i < 0x1fff; i++) /* 8192 bytes (64Kbit). */
     spi_write(0);
   mkm_chip_select(0);
+
   mkm_release();
   spi_setup(0);
 
   AVR_LED_PORT &= ~_BV(AVR_LED_RED_BIT);
+
+  /* Flash blue LED three times to indicate wipe is done */
+  for (int x = 0; x < 6; x++) {
+    AVR_LED_PORT ^= _BV(AVR_LED_BLUE_BIT);
+    for (int i = 0; i < 3200; i++);
+  }
 }
 
 static inline void
-- 
cgit v1.2.3