From 877749f668763e22f82f572591a74f551cb50cc8 Mon Sep 17 00:00:00 2001
From: Oliver Meier <h2obrain@gmail.com>
Date: Sun, 19 May 2019 19:02:48 +0200
Subject: [PATCH 01/11] lpc43xx: Fixed lpc43xx examples (untested) and
 reenabled compilation

---
 Makefile                                                    | 2 +-
 examples/lpc/lpc43xx/Makefile.include                       | 2 +-
 .../lpc/lpc43xx/diolan-lpc-4350-db1/diolan-lpc-4350-db1.ld  | 5 +++--
 examples/lpc/lpc43xx/hackrf-jellybean/i2c/i2cdemo.c         | 2 +-
 examples/lpc/lpc43xx/hackrf-jellybean/jellybean-lpc4330.ld  | 5 +++--
 .../hackrf-jellybean/jellybean-lpc4330_rom_to_ram.ld        | 6 +++---
 examples/lpc/lpc43xx/hackrf-jellybean/ssp/sspdemo.c         | 2 +-
 examples/lpc/lpc43xx/hackrf-jellybean/systick/systickdemo.c | 6 +++---
 8 files changed, 16 insertions(+), 14 deletions(-)

diff --git a/Makefile b/Makefile
index 1e986542..796779c6 100644
--- a/Makefile
+++ b/Makefile
@@ -21,7 +21,7 @@ PREFIX		?= arm-none-eabi
 #PREFIX		?= arm-elf
 
 TARGETS		:= stm32/f0 stm32/f1 stm32/f2 stm32/f3 stm32/f4 stm32/l0 stm32/l1
-TARGETS		+= lpc/lpc13xx lpc/lpc17xx #lpc/lpc43xx
+TARGETS		+= lpc/lpc13xx lpc/lpc17xx lpc/lpc43xx
 TARGETS		+= tiva/lm3s tiva/lm4f
 TARGETS		+= efm32/efm32tg efm32/efm32g efm32/efm32lg efm32/efm32gg
 TARGETS		+= vf6xx
diff --git a/examples/lpc/lpc43xx/Makefile.include b/examples/lpc/lpc43xx/Makefile.include
index 2f626716..fb2792d2 100644
--- a/examples/lpc/lpc43xx/Makefile.include
+++ b/examples/lpc/lpc43xx/Makefile.include
@@ -22,7 +22,7 @@
 
 
 LIBNAME		= opencm3_lpc43xx
-DEFS		+= -DLPC43XX
+DEFS		+= -DLPC43XX -DLPC43XX_M4
 
 FP_FLAGS	?= -mfloat-abi=hard -mfpu=fpv4-sp-d16
 ARCH_FLAGS	= -mthumb -mcpu=cortex-m4 $(FP_FLAGS)
diff --git a/examples/lpc/lpc43xx/diolan-lpc-4350-db1/diolan-lpc-4350-db1.ld b/examples/lpc/lpc43xx/diolan-lpc-4350-db1/diolan-lpc-4350-db1.ld
index 92c25aff..f2c89067 100644
--- a/examples/lpc/lpc43xx/diolan-lpc-4350-db1/diolan-lpc-4350-db1.ld
+++ b/examples/lpc/lpc43xx/diolan-lpc-4350-db1/diolan-lpc-4350-db1.ld
@@ -24,9 +24,10 @@ MEMORY
 {
   /* rom is really the shadow region that points to SPI flash or elsewhere */
   rom (rx)  : ORIGIN = 0x00000000, LENGTH =  1M
-  ram (rwx) : ORIGIN = 0x10000000, LENGTH =  128K
+  ram_local1 (rwx) : ORIGIN = 0x10000000, LENGTH =  128K
   /* there are some additional RAM regions */
+  ram_local2 (rw) : ORIGIN = 0x10080000, LENGTH =  72K
 }
 
 /* Include the common ld script. */
-INCLUDE libopencm3_lpc43xx.ld
+INCLUDE lpc43xx/m4/libopencm3_lpc43xx.ld
diff --git a/examples/lpc/lpc43xx/hackrf-jellybean/i2c/i2cdemo.c b/examples/lpc/lpc43xx/hackrf-jellybean/i2c/i2cdemo.c
index fd244bef..c025dd39 100644
--- a/examples/lpc/lpc43xx/hackrf-jellybean/i2c/i2cdemo.c
+++ b/examples/lpc/lpc43xx/hackrf-jellybean/i2c/i2cdemo.c
@@ -90,7 +90,7 @@ int main(void)
 	int i;
 
 	gpio_setup();
-	i2c0_init();
+	i2c0_init(15);
 
 	gpio_set(PORT_EN1V8, PIN_EN1V8); /* 1V8 on */
 
diff --git a/examples/lpc/lpc43xx/hackrf-jellybean/jellybean-lpc4330.ld b/examples/lpc/lpc43xx/hackrf-jellybean/jellybean-lpc4330.ld
index 29e57004..f6b7a76e 100644
--- a/examples/lpc/lpc43xx/hackrf-jellybean/jellybean-lpc4330.ld
+++ b/examples/lpc/lpc43xx/hackrf-jellybean/jellybean-lpc4330.ld
@@ -24,9 +24,10 @@ MEMORY
 {
   /* rom is really the shadow region that points to SPI flash or elsewhere */
   rom (rx)  : ORIGIN = 0x00000000, LENGTH =  1M
-  ram (rwx) : ORIGIN = 0x10000000, LENGTH =  128K
+  ram_local1 (rwx) : ORIGIN = 0x10000000, LENGTH =  128K
   /* there are some additional RAM regions */
+  ram_local2 (rw) : ORIGIN = 0x10080000, LENGTH =  72K
 }
 
 /* Include the common ld script. */
-INCLUDE libopencm3_lpc43xx.ld
+INCLUDE lpc43xx/m4/libopencm3_lpc43xx.ld
diff --git a/examples/lpc/lpc43xx/hackrf-jellybean/jellybean-lpc4330_rom_to_ram.ld b/examples/lpc/lpc43xx/hackrf-jellybean/jellybean-lpc4330_rom_to_ram.ld
index fb3d8f6d..06c50926 100644
--- a/examples/lpc/lpc43xx/hackrf-jellybean/jellybean-lpc4330_rom_to_ram.ld
+++ b/examples/lpc/lpc43xx/hackrf-jellybean/jellybean-lpc4330_rom_to_ram.ld
@@ -27,10 +27,10 @@ MEMORY
   rom_flash (rx)  : ORIGIN = 0x80000000, LENGTH =  1M
   /* rom is really the shadow region that points to SPI flash or elsewhere */
   rom (rx)  : ORIGIN = 0x00000000, LENGTH =  1M
-  ram (rwx) : ORIGIN = 0x10000000, LENGTH =  128K
+  ram_local1 (rwx) : ORIGIN = 0x10000000, LENGTH =  128K
   /* there are some additional RAM regions for data */
-  ram_data (rw) : ORIGIN = 0x10080000, LENGTH =  72K
+  ram_local2 (rw) : ORIGIN = 0x10080000, LENGTH =  72K
 }
 
 /* Include the common ld script. */
-INCLUDE libopencm3_lpc43xx_rom_to_ram.ld
+INCLUDE lpc43xx/m4/libopencm3_lpc43xx_rom_to_ram.ld
diff --git a/examples/lpc/lpc43xx/hackrf-jellybean/ssp/sspdemo.c b/examples/lpc/lpc43xx/hackrf-jellybean/ssp/sspdemo.c
index 554843be..680743a4 100644
--- a/examples/lpc/lpc43xx/hackrf-jellybean/ssp/sspdemo.c
+++ b/examples/lpc/lpc43xx/hackrf-jellybean/ssp/sspdemo.c
@@ -86,7 +86,7 @@ int main(void)
 
 	while (1) {
 
-		ssp_write(SSP1_NUM, (uint16_t)ssp_val);
+		ssp_transfer(SSP1_NUM, (uint16_t)ssp_val);
 
 		gpio_set(GPIO2, GPIOPIN1); /* LED on */
 
diff --git a/examples/lpc/lpc43xx/hackrf-jellybean/systick/systickdemo.c b/examples/lpc/lpc43xx/hackrf-jellybean/systick/systickdemo.c
index 58d2d616..28e535f7 100644
--- a/examples/lpc/lpc43xx/hackrf-jellybean/systick/systickdemo.c
+++ b/examples/lpc/lpc43xx/hackrf-jellybean/systick/systickdemo.c
@@ -71,10 +71,10 @@ static void systick_setup(void)
 	g_ulSysTickCount = 0;
 
 	/* Disable IRQ globally */
-	asm volatile ("cpsid i");
+	__asm__ __volatile__ ("cpsid i");
 
 	/* Set processor Clock as Source Clock */
-	systick_set_clocksource(STK_CTRL_CLKSOURCE);
+	systick_set_clocksource(STK_CSR_CLKSOURCE);
 
 	/* Get SysTick calibration value to obtain by default 1 tick = 10ms */
 	systick_reload_val = systick_get_calib();
@@ -97,7 +97,7 @@ static void systick_setup(void)
 	nvic_set_priority(NVIC_SYSTICK_IRQ, 0xFF);
 
 	/* Enable IRQ globally */
-	asm volatile ("cpsie i");
+	__asm__ __volatile__ ("cpsie i");
 }
 
 static void scs_dwt_cycle_counter_enabled(void)

From 2a7e4fac1438519d0a8ec83bfc1400795c562fe0 Mon Sep 17 00:00:00 2001
From: Oliver Meier <h2obrain@gmail.com>
Date: Sun, 19 May 2019 19:45:54 +0200
Subject: [PATCH 02/11] stm32l4: added missing l4 target to Makefile and added
 stm32/l4/Makefile.include

---
 Makefile                           |  3 +-
 examples/stm32/l4/Makefile.include | 44 ++++++++++++++++++++++++++++++
 2 files changed, 46 insertions(+), 1 deletion(-)
 create mode 100644 examples/stm32/l4/Makefile.include

diff --git a/Makefile b/Makefile
index 796779c6..0c8918f8 100644
--- a/Makefile
+++ b/Makefile
@@ -20,7 +20,8 @@
 PREFIX		?= arm-none-eabi
 #PREFIX		?= arm-elf
 
-TARGETS		:= stm32/f0 stm32/f1 stm32/f2 stm32/f3 stm32/f4 stm32/l0 stm32/l1
+TARGETS		:= stm32/f0 stm32/f1 stm32/f2 stm32/f3 stm32/f4
+TARGETS		+= stm32/l0 stm32/l1 stm32/l4
 TARGETS		+= lpc/lpc13xx lpc/lpc17xx lpc/lpc43xx
 TARGETS		+= tiva/lm3s tiva/lm4f
 TARGETS		+= efm32/efm32tg efm32/efm32g efm32/efm32lg efm32/efm32gg
diff --git a/examples/stm32/l4/Makefile.include b/examples/stm32/l4/Makefile.include
new file mode 100644
index 00000000..9faee860
--- /dev/null
+++ b/examples/stm32/l4/Makefile.include
@@ -0,0 +1,44 @@
+##
+## This file is part of the libopencm3 project.
+##
+## This library is free software: you can redistribute it and/or modify
+## it under the terms of the GNU Lesser General Public License as published by
+## the Free Software Foundation, either version 3 of the License, or
+## (at your option) any later version.
+##
+## This library 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 Lesser General Public License for more details.
+##
+## You should have received a copy of the GNU Lesser General Public License
+## along with this library.  If not, see <http://www.gnu.org/licenses/>.
+##
+
+# You should use linker script generation! Specify device!
+ifeq ($(DEVICE),)
+LIBNAME		= opencm3_stm32l4
+DEFS		+= -DSTM32L4
+
+FP_FLAGS	?= -mfloat-abi=hard -mfpu=fpv5-sp-d16
+ARCH_FLAGS	= -mthumb -mcpu=cortex-m4 $(FP_FLAGS)
+endif
+
+################################################################################
+# OpenOCD specific variables
+
+OOCD		?= openocd
+OOCD_INTERFACE	?= stlink-v2-1
+OOCD_TARGET	?= stm32l4x
+
+################################################################################
+# Black Magic Probe specific variables
+# Set the BMP_PORT to a serial port and then BMP is used for flashing
+BMP_PORT	?=
+
+################################################################################
+# texane/stlink specific variables
+#STLINK_PORT	?= :4242
+
+
+include ../../../../rules.mk

From 72027c9456cb849762b1fafe0350d179db90f571 Mon Sep 17 00:00:00 2001
From: Oliver Meier <h2obrain@gmail.com>
Date: Thu, 23 May 2019 11:07:27 +0200
Subject: [PATCH 03/11] rules.mk: define missing LIBDEPS for old style
 compilation

---
 examples/rules.mk | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/examples/rules.mk b/examples/rules.mk
index c1a5dade..be5fe2bd 100644
--- a/examples/rules.mk
+++ b/examples/rules.mk
@@ -84,6 +84,7 @@ ifeq ($(strip $(DEVICE)),)
 DEFS		+= -I$(OPENCM3_DIR)/include
 LDFLAGS		+= -L$(OPENCM3_DIR)/lib
 LDLIBS		+= -l$(LIBNAME)
+LIBDEPS		+= $(OPENCM3_DIR)/lib/lib$(LIBNAME).a
 LDSCRIPT	?= $(BINARY).ld
 else
 # New style, assume device is provided, and we're generating the rest.
@@ -199,7 +200,7 @@ print-%:
 	@#printf "  OBJDUMP $(*).list\n"
 	$(Q)$(OBJDUMP) -S $(*).elf > $(*).list
 
-%.elf %.map: $(OBJS) $(LDSCRIPT) $(OPENCM3_DIR)/lib/lib$(LIBNAME).a
+%.elf %.map: $(OBJS) $(LDSCRIPT) $(LIBDEPS)
 	@#printf "  LD      $(*).elf\n"
 	$(Q)$(LD) $(TGT_LDFLAGS) $(LDFLAGS) $(OBJS) $(LDLIBS) -o $(*).elf
 

From 6aec4eb61381d50840823435dcea7ef1e6507fe5 Mon Sep 17 00:00:00 2001
From: Oliver Meier <h2obrain@gmail.com>
Date: Thu, 23 May 2019 19:24:41 +0200
Subject: [PATCH 04/11] rules.mk: fix build dependencies

---
 examples/rules.mk | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/examples/rules.mk b/examples/rules.mk
index be5fe2bd..ef85965b 100644
--- a/examples/rules.mk
+++ b/examples/rules.mk
@@ -173,6 +173,7 @@ ifeq (,$(wildcard $@))
 	$(warning $(LIBNAME).a not found, attempting to rebuild in $(OPENCM3_DIR))
 	$(MAKE) -C $(OPENCM3_DIR)
 endif
+$(OPENCM3_DIR)/include/%.h: $(OPENCM3_DIR)/lib/lib$(LIBNAME).a;
 
 # Define a helper macro for debugging make errors online
 # you can type "make print-OPENCM3_DIR" and it will show you
@@ -204,15 +205,15 @@ print-%:
 	@#printf "  LD      $(*).elf\n"
 	$(Q)$(LD) $(TGT_LDFLAGS) $(LDFLAGS) $(OBJS) $(LDLIBS) -o $(*).elf
 
-%.o: %.c
+%.o: %.c $(LIBDEPS)
 	@#printf "  CC      $(*).c\n"
 	$(Q)$(CC) $(TGT_CFLAGS) $(CFLAGS) $(TGT_CPPFLAGS) $(CPPFLAGS) -o $(*).o -c $(*).c
 
-%.o: %.cxx
+%.o: %.cxx $(LIBDEPS)
 	@#printf "  CXX     $(*).cxx\n"
 	$(Q)$(CXX) $(TGT_CXXFLAGS) $(CXXFLAGS) $(TGT_CPPFLAGS) $(CPPFLAGS) -o $(*).o -c $(*).cxx
 
-%.o: %.cpp
+%.o: %.cpp $(LIBDEPS)
 	@#printf "  CXX     $(*).cpp\n"
 	$(Q)$(CXX) $(TGT_CXXFLAGS) $(CXXFLAGS) $(TGT_CPPFLAGS) $(CPPFLAGS) -o $(*).o -c $(*).cpp
 

From 6c02f9d99f07f984d387e2b3cc11459824b8948a Mon Sep 17 00:00:00 2001
From: Oliver Meier <h2obrain@gmail.com>
Date: Thu, 23 May 2019 19:29:36 +0200
Subject: [PATCH 05/11] rules.mk: removed unnecessary recipe switch

---
 examples/rules.mk | 2 --
 1 file changed, 2 deletions(-)

diff --git a/examples/rules.mk b/examples/rules.mk
index ef85965b..41e47e6d 100644
--- a/examples/rules.mk
+++ b/examples/rules.mk
@@ -169,10 +169,8 @@ include $(OPENCM3_DIR)/mk/genlink-rules.mk
 endif
 
 $(OPENCM3_DIR)/lib/lib$(LIBNAME).a:
-ifeq (,$(wildcard $@))
 	$(warning $(LIBNAME).a not found, attempting to rebuild in $(OPENCM3_DIR))
 	$(MAKE) -C $(OPENCM3_DIR)
-endif
 $(OPENCM3_DIR)/include/%.h: $(OPENCM3_DIR)/lib/lib$(LIBNAME).a;
 
 # Define a helper macro for debugging make errors online

From 16d6b242e371d2fd8fa366eb3e500520a1eb08fe Mon Sep 17 00:00:00 2001
From: Oliver Meier <h2obrain@gmail.com>
Date: Thu, 23 May 2019 19:30:12 +0200
Subject: [PATCH 06/11] rules.mk: build only for the required libopencm3 target

---
 examples/rules.mk | 18 +++++++++++++++++-
 1 file changed, 17 insertions(+), 1 deletion(-)

diff --git a/examples/rules.mk b/examples/rules.mk
index 41e47e6d..1453c1f4 100644
--- a/examples/rules.mk
+++ b/examples/rules.mk
@@ -168,9 +168,25 @@ else
 include $(OPENCM3_DIR)/mk/genlink-rules.mk
 endif
 
+# Find libopencm3 library folder
+#  this tries to match LIBNAME to manufacturer or manufacturer/series folder in lib/
+#  eg. LIBNAME=lm3s LIBFOLDER=lib/lm3s or LIBNAME=stm32f7 LIBFOLDER=lib/stm32/f7
+DIR=$(notdir $(subst /.,,$(wildcard $1/*/.)))
+LIBFOLDER=lib/$(strip \
+    $(foreach M,$(filter-out usb ethernet dispatch,$(call DIR,$(OPENCM3_DIR)/lib)), \
+        $(if $(subst opencm3_$M,,$(LIBNAME)),\
+            $(foreach S,$(call DIR,$(OPENCM3_DIR)/lib/$(M)), \
+                $(if $(subst opencm3_$M$S,,$(LIBNAME)),,$M/$S)), \
+            $M)))
+# exceptions
+ifeq ($(LIBFOLDER),lib/lpc43xx)
+LIBFOLDER=lib/lpc43xx/m4
+endif
+
+# Build libopencm3-lib if it does exists
 $(OPENCM3_DIR)/lib/lib$(LIBNAME).a:
 	$(warning $(LIBNAME).a not found, attempting to rebuild in $(OPENCM3_DIR))
-	$(MAKE) -C $(OPENCM3_DIR)
+	$(MAKE) -C $(OPENCM3_DIR) $(LIBFOLDER)
 $(OPENCM3_DIR)/include/%.h: $(OPENCM3_DIR)/lib/lib$(LIBNAME).a;
 
 # Define a helper macro for debugging make errors online

From e20be5ff3a7d5091fa2a3593e6e2576602ae565a Mon Sep 17 00:00:00 2001
From: Oliver Meier <h2obrain@gmail.com>
Date: Thu, 23 May 2019 19:30:53 +0200
Subject: [PATCH 07/11] rules.mk: pass CFLAGS variable to libopencm3

---
 examples/rules.mk | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/examples/rules.mk b/examples/rules.mk
index 1453c1f4..1aa34da4 100644
--- a/examples/rules.mk
+++ b/examples/rules.mk
@@ -186,7 +186,7 @@ endif
 # Build libopencm3-lib if it does exists
 $(OPENCM3_DIR)/lib/lib$(LIBNAME).a:
 	$(warning $(LIBNAME).a not found, attempting to rebuild in $(OPENCM3_DIR))
-	$(MAKE) -C $(OPENCM3_DIR) $(LIBFOLDER)
+	$(MAKE) -C $(OPENCM3_DIR) $(LIBFOLDER) $(if $(CFLAGS),CFLAGS="$(CFLAGS)")
 $(OPENCM3_DIR)/include/%.h: $(OPENCM3_DIR)/lib/lib$(LIBNAME).a;
 
 # Define a helper macro for debugging make errors online

From 15a0ebf6606d5d57a56eafd36240b0f1f5c1564a Mon Sep 17 00:00:00 2001
From: Oliver Meier <h2obrain@gmail.com>
Date: Thu, 23 May 2019 11:00:01 +0200
Subject: [PATCH 08/11] rules.mk: avoid double slashes in paths

---
 examples/rules.mk | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/examples/rules.mk b/examples/rules.mk
index 1aa34da4..aeccb10e 100644
--- a/examples/rules.mk
+++ b/examples/rules.mk
@@ -60,7 +60,7 @@ ifeq ($(strip $(OPENCM3_DIR)),)
 LIBPATHS := ./libopencm3 ../../../../libopencm3 ../../../../../libopencm3
 
 OPENCM3_DIR := $(wildcard $(LIBPATHS:=/locm3.sublime-project))
-OPENCM3_DIR := $(firstword $(dir $(OPENCM3_DIR)))
+OPENCM3_DIR := $(patsubst %/,%,$(firstword $(dir $(OPENCM3_DIR))))
 
 ifeq ($(strip $(OPENCM3_DIR)),)
 $(warning Cannot find libopencm3 library in the standard search paths.)

From e54f8720650bc6d3e73ad6fd6b585eb52728a451 Mon Sep 17 00:00:00 2001
From: Oliver Meier <h2obrain@gmail.com>
Date: Sun, 19 May 2019 19:11:49 +0200
Subject: [PATCH 09/11] stm32f7: added demo Makefiles

---
 Makefile                           |  2 +-
 examples/stm32/f7/Makefile.include | 44 ++++++++++++++++++++++++++++++
 2 files changed, 45 insertions(+), 1 deletion(-)
 create mode 100644 examples/stm32/f7/Makefile.include

diff --git a/Makefile b/Makefile
index 0c8918f8..a4f3e83d 100644
--- a/Makefile
+++ b/Makefile
@@ -20,7 +20,7 @@
 PREFIX		?= arm-none-eabi
 #PREFIX		?= arm-elf
 
-TARGETS		:= stm32/f0 stm32/f1 stm32/f2 stm32/f3 stm32/f4
+TARGETS		:= stm32/f0 stm32/f1 stm32/f2 stm32/f3 stm32/f4 stm32/f7
 TARGETS		+= stm32/l0 stm32/l1 stm32/l4
 TARGETS		+= lpc/lpc13xx lpc/lpc17xx lpc/lpc43xx
 TARGETS		+= tiva/lm3s tiva/lm4f
diff --git a/examples/stm32/f7/Makefile.include b/examples/stm32/f7/Makefile.include
new file mode 100644
index 00000000..ae7a2f0b
--- /dev/null
+++ b/examples/stm32/f7/Makefile.include
@@ -0,0 +1,44 @@
+##
+## This file is part of the libopencm3 project.
+##
+## This library is free software: you can redistribute it and/or modify
+## it under the terms of the GNU Lesser General Public License as published by
+## the Free Software Foundation, either version 3 of the License, or
+## (at your option) any later version.
+##
+## This library 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 Lesser General Public License for more details.
+##
+## You should have received a copy of the GNU Lesser General Public License
+## along with this library.  If not, see <http://www.gnu.org/licenses/>.
+##
+
+# You should use linker script generation! Specify device!
+ifeq ($(DEVICE),)
+LIBNAME		= opencm3_stm32f7
+DEFS		+= -DSTM32F7
+
+FP_FLAGS	?= -mfloat-abi=hard -mfpu=fpv5-sp-d16
+ARCH_FLAGS	= -mthumb -mcpu=cortex-m7 $(FP_FLAGS)
+endif
+
+################################################################################
+# OpenOCD specific variables
+
+OOCD		?= openocd
+OOCD_INTERFACE	?= stlink-v2-1
+OOCD_TARGET	?= stm32f7x
+
+################################################################################
+# Black Magic Probe specific variables
+# Set the BMP_PORT to a serial port and then BMP is used for flashing
+BMP_PORT	?=
+
+################################################################################
+# texane/stlink specific variables
+#STLINK_PORT	?= :4242
+
+
+include ../../../../rules.mk

From 4e6cb4f731f4b8641c4d9d95fbeb80018032e9a0 Mon Sep 17 00:00:00 2001
From: Oliver Meier <h2obrain@gmail.com>
Date: Thu, 16 May 2019 17:06:35 +0200
Subject: [PATCH 10/11] stm32f769i-disco: added blinkled demo

---
 .../f7/stm32f769i-discovery/blinkled/Makefile |   9 ++
 .../stm32f769i-discovery/blinkled/README.md   |   6 +
 .../blinkled/application.c                    | 119 ++++++++++++++++++
 .../f7/stm32f769i-discovery/blinkled/clock.c  |  74 +++++++++++
 .../f7/stm32f769i-discovery/blinkled/clock.h  |  38 ++++++
 5 files changed, 246 insertions(+)
 create mode 100644 examples/stm32/f7/stm32f769i-discovery/blinkled/Makefile
 create mode 100644 examples/stm32/f7/stm32f769i-discovery/blinkled/README.md
 create mode 100644 examples/stm32/f7/stm32f769i-discovery/blinkled/application.c
 create mode 100644 examples/stm32/f7/stm32f769i-discovery/blinkled/clock.c
 create mode 100644 examples/stm32/f7/stm32f769i-discovery/blinkled/clock.h

diff --git a/examples/stm32/f7/stm32f769i-discovery/blinkled/Makefile b/examples/stm32/f7/stm32f769i-discovery/blinkled/Makefile
new file mode 100644
index 00000000..62842473
--- /dev/null
+++ b/examples/stm32/f7/stm32f769i-discovery/blinkled/Makefile
@@ -0,0 +1,9 @@
+OBJS     = clock.o
+
+BINARY   = application
+
+CFLAGS   = -O3
+
+DEVICE      = stm32f769nih6
+
+include ../../Makefile.include
diff --git a/examples/stm32/f7/stm32f769i-discovery/blinkled/README.md b/examples/stm32/f7/stm32f769i-discovery/blinkled/README.md
new file mode 100644
index 00000000..0679bea2
--- /dev/null
+++ b/examples/stm32/f7/stm32f769i-discovery/blinkled/README.md
@@ -0,0 +1,6 @@
+# README
+
+Demo of gpio and exti.
+
+This simple program uses the LEDs LD1-3 to show a grey-counter.
+By pressing the blue button, all the LEDs light up. On release, the counter restarts from 0.
diff --git a/examples/stm32/f7/stm32f769i-discovery/blinkled/application.c b/examples/stm32/f7/stm32f769i-discovery/blinkled/application.c
new file mode 100644
index 00000000..d51eca26
--- /dev/null
+++ b/examples/stm32/f7/stm32f769i-discovery/blinkled/application.c
@@ -0,0 +1,119 @@
+/*
+ * This file is part of the libopencm3 project.
+ *
+ * This library is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This library 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 Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this library.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <libopencm3/cm3/nvic.h>
+#include <libopencm3/stm32/rcc.h>
+#include <libopencm3/stm32/gpio.h>
+#include <libopencm3/stm32/exti.h>
+#include "clock.h"
+
+
+/**
+ * Function definitions
+ */
+static void pin_setup(void);
+static void update_led_counter(void);
+
+/**
+ * Setup functions
+ */
+#define LED_LD1 GPIOJ,GPIO13
+#define LED_LD2 GPIOJ,GPIO5
+#define LED_LD3 GPIOA,GPIO12
+#define BUTTON_BLUE GPIOA,GPIO0
+#define BUTTON_BLUE_PRESSED() gpio_get(BUTTON_BLUE)
+void pin_setup()
+{
+	/* pin-clocks */
+	rcc_periph_clock_enable(RCC_GPIOA);
+	rcc_periph_clock_enable(RCC_GPIOJ);
+	
+	/* pins */
+	/* outputs (LEDs 1-3) */
+	gpio_mode_setup(GPIOJ, GPIO_MODE_OUTPUT, GPIO_PUPD_NONE, GPIO5 | GPIO13);
+	gpio_set_output_options(GPIOJ, GPIO_OTYPE_PP, GPIO_OSPEED_25MHZ, GPIO5 | GPIO13);
+	gpio_mode_setup(GPIOA, GPIO_MODE_OUTPUT, GPIO_PUPD_NONE, GPIO12);
+	gpio_set_output_options(GPIOA, GPIO_OTYPE_PP, GPIO_OSPEED_25MHZ, GPIO12);
+	/* inputs (blue button) */
+	gpio_mode_setup(GPIOA, GPIO_MODE_INPUT, GPIO_PUPD_NONE, GPIO0);
+
+	/* setup blue/user button */
+	exti_select_source(EXTI0, GPIOA);
+	exti_set_trigger(EXTI0, EXTI_TRIGGER_BOTH);
+	exti_enable_request(EXTI0);
+	nvic_enable_irq(NVIC_EXTI0_IRQ);
+}
+
+/**
+ * Interrupts
+ */
+
+/* Blue button interrupt (EXTI makes not too much sense here :)) */
+static bool blue_button_state_changed = false;
+void exti0_isr()
+{
+	exti_reset_request(EXTI0);
+	blue_button_state_changed = true;
+	update_led_counter();
+}
+
+/**
+ * Functions
+ */
+void update_led_counter()
+{
+	/* little grey code blinker */
+	static const uint32_t  gcl[] = {0,1,3,2,6,7,5,4};
+	static const uint32_t *gc    = gcl;
+	static const uint32_t *gcle  = gcl+sizeof(gcl)/sizeof(gcl[0])-1;
+	if (blue_button_state_changed) {
+		blue_button_state_changed = false;
+		gc = gcl;
+	}
+	if (BUTTON_BLUE_PRESSED()) {
+		gpio_set(LED_LD1);
+		gpio_set(LED_LD2);
+		gpio_set(LED_LD3);
+	} else {
+		if (*gc&0b001) gpio_set(LED_LD1);
+		else           gpio_clear(LED_LD1);
+		if (*gc&0b010) gpio_set(LED_LD2);
+		else           gpio_clear(LED_LD2);
+		if (*gc&0b100) gpio_set(LED_LD3);
+		else           gpio_clear(LED_LD3);
+		if (gc==gcle) gc = gcl;
+		else          gc++;
+	}
+}
+
+/**
+ * Main loop
+ */
+int main(void)
+{
+	/* init timers. */
+	clock_setup();
+	/* setup pins */
+	pin_setup();
+
+	while (1) {
+		msleep(1000);
+		update_led_counter();
+	}
+}
+
+
diff --git a/examples/stm32/f7/stm32f769i-discovery/blinkled/clock.c b/examples/stm32/f7/stm32f769i-discovery/blinkled/clock.c
new file mode 100644
index 00000000..2a793d49
--- /dev/null
+++ b/examples/stm32/f7/stm32f769i-discovery/blinkled/clock.c
@@ -0,0 +1,74 @@
+/*
+ * This file is part of the libopencm3 project.
+ *
+ * Copyright (C) 2014 Chuck McManis <cmcmanis@mcmanis.com>
+ *
+ * This library is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This library 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 Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this library.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+/*
+ * Now this is just the clock setup code from systick-blink as it is the
+ * transferrable part.
+ */
+
+#include <libopencm3/cm3/nvic.h>
+#include <libopencm3/cm3/systick.h>
+
+/* Common function descriptions */
+#include "clock.h"
+
+/* milliseconds since boot */
+static volatile uint64_t system_millis;
+
+/* Called when systick fires */
+void sys_tick_handler(void)
+{
+	system_millis++;
+}
+
+/* simple sleep for delay milliseconds */
+void msleep(uint32_t delay)
+{
+	uint64_t wake = system_millis + delay;
+	while (wake > system_millis) {
+		continue;
+	}
+}
+
+/* Getter function for the current time */
+uint64_t mtime(void)
+{
+	return system_millis;
+}
+
+/*
+ * clock_setup(void)
+ *
+ * This function sets up both the base board clock rate
+ * and a 1khz "system tick" count. The SYSTICK counter is
+ * a standard feature of the Cortex-M series.
+ */
+void clock_setup(void)
+{
+	/* Setup external clock */
+	rcc_clock_setup_hse(&CLOCK_SETUP, 25);
+
+	/* clock rate / CLOCK_SETUP.ahb_frequency * 1000 to get 1mS interrupt rate */
+	systick_set_reload(CLOCK_SETUP.ahb_frequency/1000);
+	systick_set_clocksource(STK_CSR_CLKSOURCE_AHB);
+	systick_counter_enable();
+
+	/* this done last */
+	systick_interrupt_enable();
+}
diff --git a/examples/stm32/f7/stm32f769i-discovery/blinkled/clock.h b/examples/stm32/f7/stm32f769i-discovery/blinkled/clock.h
new file mode 100644
index 00000000..5a2b5164
--- /dev/null
+++ b/examples/stm32/f7/stm32f769i-discovery/blinkled/clock.h
@@ -0,0 +1,38 @@
+/*
+ * This include file describes the functions exported by clock.c and the
+ * CLOCK_SETUP
+ * 
+ * This file is part of the libopencm3 project.
+ *
+ * This library is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This library 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 Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this library.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef __CLOCK_H
+#define __CLOCK_H
+
+#include <stdint.h>
+
+#include <libopencm3/stm32/rcc.h>
+
+#define CLOCK_SETUP rcc_3v3[RCC_CLOCK_3V3_216MHZ]
+
+/*
+ * Definitions for functions being abstracted out
+ */
+void msleep(uint32_t);
+uint64_t mtime(void);
+void clock_setup(void);
+
+#endif /* generic header protector */
+

From 7c432aa2ae74abd7a52818846cce4896fbcc542f Mon Sep 17 00:00:00 2001
From: Oliver Meier <h2obrain@gmail.com>
Date: Thu, 16 May 2019 17:06:57 +0200
Subject: [PATCH 11/11] stm32f769i-disco: added sdram demo

---
 .../f7/stm32f769i-discovery/sdram/Makefile    |  11 +
 .../f7/stm32f769i-discovery/sdram/README.md   |   8 +
 .../stm32f769i-discovery/sdram/application.c  | 208 ++++++++++++++++++
 .../f7/stm32f769i-discovery/sdram/clock.c     |  74 +++++++
 .../f7/stm32f769i-discovery/sdram/clock.h     |  38 ++++
 .../f7/stm32f769i-discovery/sdram/sdram.c     | 199 +++++++++++++++++
 .../f7/stm32f769i-discovery/sdram/sdram.h     |  47 ++++
 7 files changed, 585 insertions(+)
 create mode 100644 examples/stm32/f7/stm32f769i-discovery/sdram/Makefile
 create mode 100644 examples/stm32/f7/stm32f769i-discovery/sdram/README.md
 create mode 100644 examples/stm32/f7/stm32f769i-discovery/sdram/application.c
 create mode 100644 examples/stm32/f7/stm32f769i-discovery/sdram/clock.c
 create mode 100644 examples/stm32/f7/stm32f769i-discovery/sdram/clock.h
 create mode 100644 examples/stm32/f7/stm32f769i-discovery/sdram/sdram.c
 create mode 100644 examples/stm32/f7/stm32f769i-discovery/sdram/sdram.h

diff --git a/examples/stm32/f7/stm32f769i-discovery/sdram/Makefile b/examples/stm32/f7/stm32f769i-discovery/sdram/Makefile
new file mode 100644
index 00000000..0bbe438f
--- /dev/null
+++ b/examples/stm32/f7/stm32f769i-discovery/sdram/Makefile
@@ -0,0 +1,11 @@
+BINARY  = application
+
+OBJS    = clock.o sdram.o
+OBJS   += $(patsubst %.c, %.o, $(wildcard support/*.c))
+
+CFLAGS   = -O3
+
+DEVICE   = stm32f769nih6
+FP_FLAGS = -mfloat-abi=hard -mfpu=fpv5-d16
+
+include ../../Makefile.include
diff --git a/examples/stm32/f7/stm32f769i-discovery/sdram/README.md b/examples/stm32/f7/stm32f769i-discovery/sdram/README.md
new file mode 100644
index 00000000..c0b3a387
--- /dev/null
+++ b/examples/stm32/f7/stm32f769i-discovery/sdram/README.md
@@ -0,0 +1,8 @@
+# README
+
+Demo of sdram.
+
+This simple program first fills the whole ram area with consecutive numbers then checks if all the values were correctly set.
+If there were no errors, the green led lights up, otherwise the red LED lights up.
+
+By pressing the blue button, the test is started again.
diff --git a/examples/stm32/f7/stm32f769i-discovery/sdram/application.c b/examples/stm32/f7/stm32f769i-discovery/sdram/application.c
new file mode 100644
index 00000000..d0d17c83
--- /dev/null
+++ b/examples/stm32/f7/stm32f769i-discovery/sdram/application.c
@@ -0,0 +1,208 @@
+/*
+ * This file is part of the libopencm3 project.
+ *
+ * This library is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This library 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 Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this library.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <stdbool.h>
+
+#include <libopencm3/cm3/nvic.h>
+#include <libopencm3/stm32/rcc.h>
+#include <libopencm3/stm32/gpio.h>
+#include <libopencm3/stm32/exti.h>
+#include "clock.h"
+#include "sdram.h"
+
+/**
+ * Function definitions
+ */
+static void pin_setup(void);
+static void ram_test(void);
+
+/***********************************************************************
+ * Setup functions
+ */
+#define LED_LD1 GPIOJ,GPIO13
+#define LED_LD2 GPIOJ,GPIO5
+#define LED_LD3 GPIOA,GPIO12
+#define BUTTON_BLUE GPIOA,GPIO0
+#define BUTTON_BLUE_PRESSED() gpio_get(BUTTON_BLUE)
+void pin_setup()
+{
+	/* pin-clocks */
+	rcc_periph_clock_enable(RCC_GPIOA);
+	rcc_periph_clock_enable(RCC_GPIOJ);
+	/* pins */
+	/* outputs (LEDs 1-3) */
+	gpio_mode_setup(GPIOJ, GPIO_MODE_OUTPUT, GPIO_PUPD_NONE, GPIO5 | GPIO13);
+	gpio_set_output_options(GPIOJ, GPIO_OTYPE_PP, GPIO_OSPEED_25MHZ, GPIO5 | GPIO13);
+	gpio_mode_setup(GPIOA, GPIO_MODE_OUTPUT, GPIO_PUPD_NONE, GPIO12);
+	gpio_set_output_options(GPIOA, GPIO_OTYPE_PP, GPIO_OSPEED_25MHZ, GPIO12);
+	/* inputs (blue button) */
+	gpio_mode_setup(GPIOA, GPIO_MODE_INPUT, GPIO_PUPD_NONE, GPIO0);
+	/* setup blue/user button */
+	exti_select_source(EXTI0, GPIOA);
+	exti_set_trigger(EXTI0, EXTI_TRIGGER_BOTH);
+	exti_enable_request(EXTI0);
+	nvic_enable_irq(NVIC_EXTI0_IRQ);
+
+	/* setup sdram clocks */
+	rcc_periph_clock_enable(RCC_FMC);
+	rcc_periph_clock_enable(RCC_GPIOD);
+	rcc_periph_clock_enable(RCC_GPIOE);
+	rcc_periph_clock_enable(RCC_GPIOF);
+	rcc_periph_clock_enable(RCC_GPIOG);
+	rcc_periph_clock_enable(RCC_GPIOH);
+	rcc_periph_clock_enable(RCC_GPIOI);
+	
+	/* setup sdram pins */
+	gpio_mode_setup(GPIOD, GPIO_MODE_AF, GPIO_PUPD_NONE,
+		GPIO0 | GPIO1 | GPIO8 | GPIO9 | GPIO10 | GPIO14 | GPIO15);
+	gpio_set_output_options(GPIOD, GPIO_OTYPE_PP, GPIO_OSPEED_50MHZ,
+		GPIO0 | GPIO1 | GPIO8 | GPIO9 | GPIO10 | GPIO14 | GPIO15);
+	gpio_set_af(GPIOD, GPIO_AF12,
+		GPIO0 | GPIO1 | GPIO8 | GPIO9 | GPIO10 | GPIO14 | GPIO15);
+	
+	gpio_mode_setup(GPIOE, GPIO_MODE_AF, GPIO_PUPD_NONE,
+		GPIO0  | GPIO1  | GPIO7  | GPIO8  | GPIO9  | GPIO10 |
+		GPIO11 | GPIO12 | GPIO13 | GPIO14 | GPIO15);
+	gpio_set_output_options(GPIOE, GPIO_OTYPE_PP, GPIO_OSPEED_50MHZ,
+		GPIO0  | GPIO1  | GPIO7  | GPIO8  | GPIO9  | GPIO10 |
+		GPIO11 | GPIO12 | GPIO13 | GPIO14 | GPIO15);
+	gpio_set_af(GPIOE, GPIO_AF12,
+		GPIO0  | GPIO1  | GPIO7  | GPIO8  | GPIO9  | GPIO10 |
+		GPIO11 | GPIO12 | GPIO13 | GPIO14 | GPIO15);
+	
+	gpio_mode_setup(GPIOF, GPIO_MODE_AF, GPIO_PUPD_NONE,
+		GPIO0  | GPIO1  | GPIO2  | GPIO3  | GPIO4  | GPIO5  |
+		GPIO11 | GPIO12 | GPIO13 | GPIO14 | GPIO15);
+	gpio_set_output_options(GPIOF, GPIO_OTYPE_PP, GPIO_OSPEED_50MHZ,
+		GPIO0  | GPIO1  | GPIO2  | GPIO3  | GPIO4  | GPIO5  |
+		GPIO11 | GPIO12 | GPIO13 | GPIO14 | GPIO15);
+	gpio_set_af(GPIOF, GPIO_AF12,
+		GPIO0  | GPIO1  | GPIO2  | GPIO3  | GPIO4  | GPIO5  |
+		GPIO11 | GPIO12 | GPIO13 | GPIO14 | GPIO15);
+	
+	gpio_mode_setup(GPIOG, GPIO_MODE_AF, GPIO_PUPD_NONE,
+		GPIO0  | GPIO1  | GPIO2  | GPIO4  | GPIO5  | GPIO8  | GPIO15);
+	gpio_set_output_options(GPIOG, GPIO_OTYPE_PP, GPIO_OSPEED_50MHZ,
+		GPIO0  | GPIO1  | GPIO2  | GPIO4  | GPIO5  | GPIO8  | GPIO15);
+	gpio_set_af(GPIOG, GPIO_AF12,
+		GPIO0  | GPIO1  | GPIO2  | GPIO4  | GPIO5  | GPIO8  | GPIO15);
+
+	gpio_mode_setup(GPIOH, GPIO_MODE_AF, GPIO_PUPD_NONE,
+		GPIO2  | GPIO3  | GPIO5  | GPIO8  | GPIO9  | GPIO10 |
+		GPIO11 | GPIO12 | GPIO13 | GPIO14 | GPIO15);
+	gpio_set_output_options(GPIOH, GPIO_OTYPE_PP, GPIO_OSPEED_50MHZ,
+		GPIO2  | GPIO3  | GPIO5  | GPIO8  | GPIO9  | GPIO10 |
+		GPIO11 | GPIO12 | GPIO13 | GPIO14 | GPIO15);
+	gpio_set_af(GPIOH, GPIO_AF12,
+		GPIO2  | GPIO3  | GPIO5  | GPIO8  | GPIO9  | GPIO10 |
+		GPIO11 | GPIO12 | GPIO13 | GPIO14 | GPIO15);
+	
+	gpio_mode_setup(GPIOI, GPIO_MODE_AF, GPIO_PUPD_NONE,
+		GPIO0  | GPIO1  | GPIO2  | GPIO3  | GPIO4  | GPIO5  |
+		GPIO6  | GPIO7  | GPIO9  | GPIO10);
+	gpio_set_output_options(GPIOI, GPIO_OTYPE_PP, GPIO_OSPEED_50MHZ,
+		GPIO0  | GPIO1  | GPIO2  | GPIO3  | GPIO4  | GPIO5  |
+		GPIO6  | GPIO7  | GPIO9  | GPIO10);
+	gpio_set_af(GPIOI, GPIO_AF12,
+		GPIO0  | GPIO1  | GPIO2  | GPIO3  | GPIO4  | GPIO5  |
+		GPIO6  | GPIO7  | GPIO9  | GPIO10);
+}
+
+/***********************************************************************
+ * Interrupts
+ */
+
+/* Blue button interrupt */
+void exti0_isr()
+{
+	exti_reset_request(EXTI0);
+	/* Re-/start ram_test */
+	ram_test();
+}
+
+/***********************************************************************
+ * Functions
+ */
+
+/**
+ * Very simple ram checker
+ */
+void ram_test()
+{
+	/* Set error and success */
+	gpio_set(LED_LD1);
+	gpio_set(LED_LD2);
+
+	/* Iterate over the whole ram area */
+	uint32_t error_count=0;
+#define SDRAM_SIZE  (0x1000000/sizeof(uint32_t))
+	uint32_t *sdram;
+
+	/* Write */
+	sdram = (uint32_t *)SDRAM1_BASE_ADDRESS;
+	for (uint32_t i = 0; i<SDRAM_SIZE; i++) {
+		/* Write value to ram */
+		*sdram++=i;
+		/* Blink error LED */
+		if (i&0x40000) {
+			gpio_set(LED_LD1);
+		} else {
+			gpio_clear(LED_LD1);
+		}
+	}
+	gpio_set(LED_LD1);
+	
+	/* Read */
+	sdram = (uint32_t *)SDRAM1_BASE_ADDRESS;
+	for (uint32_t i = 0; i<SDRAM_SIZE; i++) {
+		/* Read and compare value */
+		if (*sdram++!=i) error_count++;
+		/* Blink success LED */
+		if (i&0x40000) {
+			gpio_set(LED_LD2);
+		} else {
+			gpio_clear(LED_LD2);
+		}
+	}
+	gpio_set(LED_LD2);
+
+	/* Clear error or success */
+	if (error_count>0) {
+		gpio_clear(LED_LD2);
+	} else {
+		gpio_clear(LED_LD1);
+	}
+}
+
+/***********************************************************************
+ * Main loop
+ */
+int main(void)
+{
+	/* Init timers. */
+	clock_setup();
+	/* Setup pins */
+	pin_setup();
+	/* Setup sdram */
+	sdram_init();
+	/* Run initial ram test */
+	ram_test();
+	/* Wait forever */
+	while (1) {}
+}
+
+
diff --git a/examples/stm32/f7/stm32f769i-discovery/sdram/clock.c b/examples/stm32/f7/stm32f769i-discovery/sdram/clock.c
new file mode 100644
index 00000000..2a793d49
--- /dev/null
+++ b/examples/stm32/f7/stm32f769i-discovery/sdram/clock.c
@@ -0,0 +1,74 @@
+/*
+ * This file is part of the libopencm3 project.
+ *
+ * Copyright (C) 2014 Chuck McManis <cmcmanis@mcmanis.com>
+ *
+ * This library is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This library 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 Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this library.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+/*
+ * Now this is just the clock setup code from systick-blink as it is the
+ * transferrable part.
+ */
+
+#include <libopencm3/cm3/nvic.h>
+#include <libopencm3/cm3/systick.h>
+
+/* Common function descriptions */
+#include "clock.h"
+
+/* milliseconds since boot */
+static volatile uint64_t system_millis;
+
+/* Called when systick fires */
+void sys_tick_handler(void)
+{
+	system_millis++;
+}
+
+/* simple sleep for delay milliseconds */
+void msleep(uint32_t delay)
+{
+	uint64_t wake = system_millis + delay;
+	while (wake > system_millis) {
+		continue;
+	}
+}
+
+/* Getter function for the current time */
+uint64_t mtime(void)
+{
+	return system_millis;
+}
+
+/*
+ * clock_setup(void)
+ *
+ * This function sets up both the base board clock rate
+ * and a 1khz "system tick" count. The SYSTICK counter is
+ * a standard feature of the Cortex-M series.
+ */
+void clock_setup(void)
+{
+	/* Setup external clock */
+	rcc_clock_setup_hse(&CLOCK_SETUP, 25);
+
+	/* clock rate / CLOCK_SETUP.ahb_frequency * 1000 to get 1mS interrupt rate */
+	systick_set_reload(CLOCK_SETUP.ahb_frequency/1000);
+	systick_set_clocksource(STK_CSR_CLKSOURCE_AHB);
+	systick_counter_enable();
+
+	/* this done last */
+	systick_interrupt_enable();
+}
diff --git a/examples/stm32/f7/stm32f769i-discovery/sdram/clock.h b/examples/stm32/f7/stm32f769i-discovery/sdram/clock.h
new file mode 100644
index 00000000..5a2b5164
--- /dev/null
+++ b/examples/stm32/f7/stm32f769i-discovery/sdram/clock.h
@@ -0,0 +1,38 @@
+/*
+ * This include file describes the functions exported by clock.c and the
+ * CLOCK_SETUP
+ * 
+ * This file is part of the libopencm3 project.
+ *
+ * This library is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This library 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 Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this library.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef __CLOCK_H
+#define __CLOCK_H
+
+#include <stdint.h>
+
+#include <libopencm3/stm32/rcc.h>
+
+#define CLOCK_SETUP rcc_3v3[RCC_CLOCK_3V3_216MHZ]
+
+/*
+ * Definitions for functions being abstracted out
+ */
+void msleep(uint32_t);
+uint64_t mtime(void);
+void clock_setup(void);
+
+#endif /* generic header protector */
+
diff --git a/examples/stm32/f7/stm32f769i-discovery/sdram/sdram.c b/examples/stm32/f7/stm32f769i-discovery/sdram/sdram.c
new file mode 100644
index 00000000..1ee583b1
--- /dev/null
+++ b/examples/stm32/f7/stm32f769i-discovery/sdram/sdram.c
@@ -0,0 +1,199 @@
+/*
+ * This file is part of the libopencm3 project.
+ *
+ * Copyright (C) 2014 Chuck McManis <cmcmanis@mcmanis.com>
+ *
+ * This library is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This library 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 Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this library.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "clock.h"
+#include "sdram.h"
+#include <assert.h>
+
+/*
+ * Initialize the SD RAM controller. (with default values)
+ */
+void
+sdram_init(void) {
+	/* Note the 32F769DISCOVERY board has the ram attached to bank 1 */
+	/* Timing parameters computed for a 216Mhz clock */
+	/* These parameters are specific to the SDRAM chip on the board */
+	sdram_init_custom(
+			SDRAM_BANK1,
+			32,
+			12,8,
+			(struct sdram_timing) {
+				.trcd = 2,  /* RCD Delay */
+				.trp  = 2,  /* RP Delay */
+				.twr  = 2,  /* Write Recovery Time */
+				.trc  = 7,  /* Row Cycle Delay */
+				.tras = 4,  /* Self Refresh Time */
+				.txsr = 7,  /* Exit Self Refresh Time */
+				.tmrd = 2,  /* Load to Active Delay */
+			},
+			3,
+			false, false,
+			2
+		);
+}
+void
+sdram_init_custom(
+		enum fmc_sdram_bank sdram_bank,
+		uint32_t memory_width,
+		uint32_t row_count, uint32_t column_count,
+		struct sdram_timing timing,
+		uint32_t cas_latency,
+		bool read_burst, bool write_burst,
+		uint32_t burst_length
+) {
+	uint32_t cr_tmp, tr_tmp; /* control, timing registers */
+	uint32_t cmd_tmp;        /* sdram command */
+
+	cr_tmp = cmd_tmp = 0;
+
+	cr_tmp |= FMC_SDCR_RPIPE_1CLK;
+	cr_tmp |= FMC_SDCR_SDCLK_2HCLK;
+	cr_tmp |= FMC_SDCR_NB4; // sdram has 4 internal banks
+	switch (cas_latency) {
+		case 2:
+			cr_tmp  |= FMC_SDCR_CAS_2CYC;
+			cmd_tmp |= SDRAM_MODE_CAS_LATENCY_2;
+			break;
+		case 3:
+			cr_tmp  |= FMC_SDCR_CAS_3CYC;
+			cmd_tmp |= SDRAM_MODE_CAS_LATENCY_3;
+			break;
+		default:
+			assert("Invalid CAS latency");
+			break;
+	}
+	switch (memory_width) {
+		case 8:
+			cr_tmp |= FMC_SDCR_MWID_8b;
+			break;
+		case 16:
+			cr_tmp |= FMC_SDCR_MWID_16b;
+			break;
+		case 32:
+			cr_tmp |= FMC_SDCR_MWID_32b;
+			break;
+		default:
+			assert("Invalid memory width" && 0);
+			break;
+	}
+	switch (row_count) {
+		case 11:
+			cr_tmp |= FMC_SDCR_NR_11;
+			break;
+		case 12:
+			cr_tmp |= FMC_SDCR_NR_12;
+			break;
+		case 13:
+			cr_tmp |= FMC_SDCR_NR_13;
+			break;
+		default:
+			assert("Invalid row count" && 0);
+			break;
+	}
+	switch (column_count) {
+		case 8:
+			cr_tmp |= FMC_SDCR_NC_8;
+			break;
+		case 9:
+			cr_tmp |= FMC_SDCR_NC_9;
+			break;
+		case 10:
+			cr_tmp |= FMC_SDCR_NC_10;
+			break;
+		case 11:
+			cr_tmp |= FMC_SDCR_NC_11;
+			break;
+		default:
+			assert("Invalid column count" && 0);
+			break;
+	}
+	if (read_burst) {
+		cr_tmp |= FMC_SDCR_RBURST;
+	}
+
+	/* If we're programming BANK 2, but per the manual some of the parameters
+	 * only work in CR1 and TR1 so we pull those off and put them in the
+	 * right place.
+	 */
+	tr_tmp     = sdram_timing(&timing);
+	if ((sdram_bank==SDRAM_BANK1)||(sdram_bank==SDRAM_BOTH_BANKS)) {
+		FMC_SDCR1 = cr_tmp;
+		FMC_SDTR1 = tr_tmp;
+	} else
+	if (sdram_bank==SDRAM_BANK2) {
+		FMC_SDCR1 |= (cr_tmp & FMC_SDCR_DNC_MASK);
+		FMC_SDTR1 |= (tr_tmp & FMC_SDTR_DNC_MASK);
+	} else {
+		assert(0);
+	}
+	if ((sdram_bank==SDRAM_BANK2)||(sdram_bank==SDRAM_BOTH_BANKS)) {
+		FMC_SDCR2 = cr_tmp;
+		FMC_SDTR2 = tr_tmp;
+	}
+
+	/* Now start up the Controller per the manual
+	 *	- Clock config enable
+	 *	- PALL state
+	 *	- set auto refresh
+	 *	- Load the Mode Register
+	 */
+	sdram_command(sdram_bank, SDRAM_CLK_CONF, 1, 0);
+	msleep(1); /* sleep at least 200uS */
+	sdram_command(sdram_bank, SDRAM_PALL, 1, 0);
+	msleep(1); /* ? sleep >100uS */
+	sdram_command(sdram_bank, SDRAM_AUTO_REFRESH, 7, 0);
+	msleep(1); /* ?? sleep >100uS */
+
+	cmd_tmp |= SDRAM_MODE_BURST_TYPE_SEQUENTIAL |
+	           SDRAM_MODE_OPERATING_MODE_STANDARD;
+	if (write_burst) {
+		cmd_tmp |= SDRAM_MODE_WRITEBURST_MODE_PROGRAMMED;
+	} else {
+		cmd_tmp |= SDRAM_MODE_WRITEBURST_MODE_SINGLE;
+	}
+	switch (burst_length) {
+		case 1:
+			cmd_tmp |= SDRAM_MODE_BURST_LENGTH_1;
+			break;
+		case 2:
+			cmd_tmp |= SDRAM_MODE_BURST_LENGTH_2;
+			break;
+		case 4:
+			cmd_tmp |= SDRAM_MODE_BURST_LENGTH_4;
+			break;
+		case 8:
+			cmd_tmp |= SDRAM_MODE_BURST_LENGTH_8;
+			break;
+		default:
+			assert("Invalid burst length");
+			break;
+	}
+	sdram_command(sdram_bank, SDRAM_LOAD_MODE, 1, cmd_tmp);
+
+
+	msleep(1); /* ?? sleep >100uS */
+	sdram_command(sdram_bank, SDRAM_NORMAL, 0, 0);
+
+	/*
+	 * set the refresh counter to insure we kick off an
+	 * auto refresh often enough to prevent data loss.
+	 */
+	FMC_SDRTR = 683; // 128mbit // 64ms/(1<<13)*216MHz/2-20
+	/* and Poof! a 16 megabytes of ram shows up in the address space */
+}
diff --git a/examples/stm32/f7/stm32f769i-discovery/sdram/sdram.h b/examples/stm32/f7/stm32f769i-discovery/sdram/sdram.h
new file mode 100644
index 00000000..96ac8710
--- /dev/null
+++ b/examples/stm32/f7/stm32f769i-discovery/sdram/sdram.h
@@ -0,0 +1,47 @@
+/*
+ * This file is part of the libopencm3 project.
+ *
+ * Copyright (C) 2014 Chuck McManis <cmcmanis@mcmanis.com>
+ *
+ * This library is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This library 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 Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this library.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef __SDRAM_H
+#define __SDRAM_H
+
+#include <stdint.h>
+#include <libopencm3/stm32/gpio.h>
+#include <libopencm3/stm32/rcc.h>
+#include <libopencm3/stm32/fsmc.h>
+
+#define SDRAM1_BASE_ADDRESS (0xc0000000U)
+#define SDRAM2_BASE_ADDRESS (0xd0000000U)
+
+/* Initialize the SDRAM chip on the board */
+void sdram_init(void);
+void sdram_init_custom(
+		enum fmc_sdram_bank sdram_bank,
+		uint32_t memory_width,
+		uint32_t row_count, uint32_t column_count,
+		struct sdram_timing timing,
+		uint32_t cas_latency,
+		bool read_burst, bool write_burst,
+		uint32_t burst_length
+);
+
+#ifndef NULL
+#define NULL	(void *)(0)
+#endif
+
+#endif