diff --git a/examples/stm32/f4/stm32f4-disco/systick-blink/Makefile b/examples/stm32/f4/stm32f4-disco/systick-blink/Makefile
deleted file mode 100644
index 0aba9ea..0000000
--- a/examples/stm32/f4/stm32f4-disco/systick-blink/Makefile
+++ /dev/null
@@ -1,22 +0,0 @@
-#
-# 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/>.
-#
-
-BINARY = systick-blink
-
-LDSCRIPT = ../stm32f4-disco.ld
-
-include ../../Makefile.include
diff --git a/examples/stm32/f4/stm32f4-disco/systick-blink/README b/examples/stm32/f4/stm32f4-disco/systick-blink/README
deleted file mode 100644
index 3352d95..0000000
--- a/examples/stm32/f4/stm32f4-disco/systick-blink/README
+++ /dev/null
@@ -1,7 +0,0 @@
-Systick Blink
--------------
-
-This version of blink is slightly more sophisticated, it shows how you
-can initialize the Cortex M SYSTICK register to give a regular interrupt.
-It adds a function for doing precise delays. The original blink code
-is then rewritten with this in mind to create a 10Hz blinking pattern.
diff --git a/examples/stm32/f4/stm32f4-disco/systick-blink/systick-blink.c b/examples/stm32/f4/stm32f4-disco/systick-blink/systick-blink.c
deleted file mode 100644
index 7a9ebd4..0000000
--- a/examples/stm32/f4/stm32f4-disco/systick-blink/systick-blink.c
+++ /dev/null
@@ -1,93 +0,0 @@
-/*
- * This file is part of the libopencm3 project.
- *
- * Copyright (C) 2013 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/>.
- */
-
-/* This version derived from fancy blink */
-
-#include <libopencm3/stm32/rcc.h>
-#include <libopencm3/stm32/gpio.h>
-#include <libopencm3/cm3/nvic.h>
-#include <libopencm3/cm3/systick.h>
-
-/*
- * Definitions for functions being abstracted out
- */
-void msleep(uint32_t);
-void clock_setup(void);
-
-/* monotonically increasing number of milliseconds from reset
- * overflows every 49 days if you're wondering
- */
-volatile uint32_t system_millis;
-
-/* Called when systick fires */
-void sys_tick_handler(void) {
-	system_millis++;
-}
-
-/* sleep for delay milliseconds */
-void msleep(uint32_t delay) {
-	uint32_t wake = system_millis + delay;
-	while (wake > 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)
-{
-	/* Base board frequency, set to 168Mhz */
-	rcc_clock_setup_hse_3v3(&hse_8mhz_3v3[CLOCK_3V3_168MHZ]);
-
-	/* clock rate / 168000 to get 1mS interrupt rate */
-	systick_set_reload(168000);
-	systick_set_clocksource(STK_CSR_CLKSOURCE_AHB);
-	systick_counter_enable();
-
-	/* this done last */
-	systick_interrupt_enable();
-}
-
-int main(void)
-{
-	/* Set up clock and systick */
-	clock_setup();
-
-	/* Enable GPIOD clock. */
-	rcc_periph_clock_enable(RCC_GPIOG);
-
-	/* Set GPIO13-14 (in GPIO port G) to 'output push-pull'. */
-	gpio_mode_setup(GPIOG, GPIO_MODE_OUTPUT, GPIO_PUPD_NONE, GPIO13 | GPIO14);
-
-	/* Set LED for alternating effect when toggling. */
-	gpio_set(GPIOG, GPIO13);
-
-	/* Blink the LEDs (PD12, PD13, PD14 and PD15) on the board. */
-	while (1) {
-		gpio_toggle(GPIOG, GPIO13 | GPIO14);
-		/* Now sleep for 100ms which toggles at 10hz rate */
-		msleep(100);
-	}
-
-	return 0;
-}
diff --git a/examples/stm32/f4/stm32f429i-discovery/tick_blink/tick_blink.c b/examples/stm32/f4/stm32f429i-discovery/tick_blink/tick_blink.c
index bb0f061..acab919 100644
--- a/examples/stm32/f4/stm32f429i-discovery/tick_blink/tick_blink.c
+++ b/examples/stm32/f4/stm32f429i-discovery/tick_blink/tick_blink.c
@@ -46,7 +46,12 @@ static void msleep(uint32_t delay)
 	while (wake > system_millis);
 }
 
-/* Set up a timer to create 1mS ticks. */
+/*
+ * systick_setup(void)
+ *
+ * This function sets up the 1khz "system tick" count. The SYSTICK counter is a
+ * standard feature of the Cortex-M series.
+ */
 static void systick_setup(void)
 {
 	/* clock rate / 1000 to get 1mS interrupt rate */
@@ -57,7 +62,7 @@ static void systick_setup(void)
 	systick_interrupt_enable();
 }
 
-/* Set STM32 to 168 MHz. */
+/* Set STM32 system clock to 168 MHz. */
 static void clock_setup(void)
 {
 	rcc_clock_setup_hse_3v3(&hse_8mhz_3v3[CLOCK_3V3_168MHZ]);