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diff --git a/examples/stm32/f1/stm32-h103/led_stripe/led_stripe.c b/examples/stm32/f1/stm32-h103/led_stripe/led_stripe.c
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+/*
+ * This file is part of the libopencm3 project.
+ *
+ * Copyright (C) 2011 Piotr Esden-Tempski <piotr@esden.net>
+ *
+ * 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 3 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, see <http://www.gnu.org/licenses/>.
+ */
+
+/*
+ * This example is implementing the protocol of ZJ168 addressable led
+ * strips. These strips use the LPD6803 controller. You may be able to
+ * find the datasheet here:
+ * http://www.adafruit.com/datasheets/LPD6803.pdf
+ */
+
+#include <stdlib.h>
+
+#include <libopencm3/stm32/f1/rcc.h>
+#include <libopencm3/stm32/f1/gpio.h>
+
+#define SPI_BANK GPIOB
+#define SCLK_PIN GPIO13
+#define MOSI_PIN GPIO15
+
+#define SMALL_DELAY_VALUE 0
+
+#define COLOR_COUNT 50
+
+#define SCLK(VAL) \
+ if (VAL) { \
+ gpio_set(SPI_BANK, SCLK_PIN); \
+ } else { \
+ gpio_clear(SPI_BANK, SCLK_PIN); \
+ }
+
+#define MOSI(VAL) \
+ if (VAL) { \
+ gpio_set(SPI_BANK, MOSI_PIN); \
+ } else { \
+ gpio_clear(SPI_BANK, MOSI_PIN); \
+ }
+
+#define SMALL_DELAY() { \
+ int j; \
+ for (j = 0; j < SMALL_DELAY_VALUE; j++) \
+ __asm__("nop"); \
+ }
+
+struct color {
+ u8 r;
+ u8 g;
+ u8 b;
+};
+
+/* Set STM32 to 72 MHz. */
+void clock_setup(void)
+{
+ rcc_clock_setup_in_hse_8mhz_out_72mhz();
+
+ /* Enable GPIOC clock. */
+ rcc_peripheral_enable_clock(&RCC_APB2ENR, RCC_APB2ENR_IOPCEN);
+ rcc_peripheral_enable_clock(&RCC_APB2ENR, RCC_APB2ENR_IOPBEN);
+
+}
+
+void gpio_setup(void)
+{
+ /* Set GPIO12 (in GPIO port C) to 'output push-pull'. */
+ gpio_set_mode(GPIOC, GPIO_MODE_OUTPUT_50_MHZ,
+ GPIO_CNF_OUTPUT_PUSHPULL, GPIO12);
+ gpio_set_mode(GPIOB, GPIO_MODE_OUTPUT_50_MHZ,
+ GPIO_CNF_OUTPUT_PUSHPULL, GPIO13);
+ gpio_set_mode(GPIOB, GPIO_MODE_OUTPUT_50_MHZ,
+ GPIO_CNF_OUTPUT_PUSHPULL, GPIO15);
+}
+
+void send_colors(struct color *colors, int count) {
+ int i, k;
+
+ /* initialize spi pins */
+ SCLK(0);
+ MOSI(0);
+
+ /* start frame */
+ for (i=0; i<32; i++) {
+ SCLK(1);
+ SMALL_DELAY();
+ SCLK(0);
+ SMALL_DELAY();
+ }
+
+ /* color cell output */
+ for (k = 0; k < count; k++) {
+ /* Start bit */
+ MOSI(1);
+ SCLK(1);
+ SMALL_DELAY();
+ SCLK(0);
+ SMALL_DELAY();
+
+ /* Blue */
+ for (i=0; i<5; i++) {
+ MOSI(((colors[k].b & ((1 << 4) >> i)) != 0));
+ SCLK(1);
+ SMALL_DELAY();
+ SCLK(0);
+ SMALL_DELAY();
+ }
+ /* Red */
+ for (i=0; i<5; i++) {
+ MOSI(((colors[k].r & ((1 << 4) >> i)) != 0));
+ SCLK(1);
+ SMALL_DELAY();
+ SCLK(0);
+ SMALL_DELAY();
+ }
+ /* Green */
+ for (i=0; i<5; i++) {
+ MOSI(((colors[k].g & ((1 << 4) >> i)) != 0));
+ SCLK(1);
+ SMALL_DELAY();
+ SCLK(0);
+ SMALL_DELAY();
+ }
+ }
+
+ /* End frame */
+ MOSI(0);
+ for (k=0; k < count; k++) {
+ SCLK(1);
+ SMALL_DELAY();
+ SCLK(0);
+ SMALL_DELAY();
+ }
+}
+
+void reset_colors(struct color *colors, int count) {
+ int i;
+
+ for (i=0; i<count; i++) {
+ colors[i].r = 0;
+ colors[i].g = 0;
+ colors[i].b = 0;
+ }
+}
+
+void init_colors(struct color *colors, int count) {
+
+ colors[0].r = 0x1F;
+ colors[0].g = 0;
+ colors[0].b = 0;
+ colors[1].r = 0;
+ colors[1].g = 0x1F;
+ colors[1].b = 0;
+ colors[2].r = 0;
+ colors[2].g = 0;
+ colors[2].b = 0x1F;
+
+ count = count;
+}
+
+void step_colors(struct color *colors, int count) {
+ int i;
+ struct color tmp_color1;
+ struct color tmp_color2;
+
+/* random blinking */
+/*
+ for (i=0; i<count; i++) {
+ colors[i].r = rand()&0x01;
+ colors[i].g = rand()&0x01;
+ colors[i].b = rand()&0x01;
+ }
+*/
+ /* generate next colors */
+
+ tmp_color1.r = colors[0].r;
+ tmp_color1.g = colors[0].g;
+ tmp_color1.b = colors[0].b;
+ colors[0].r = colors[count-1].r;
+ colors[0].g = colors[count-1].g;
+ colors[0].b = colors[count-1].b;
+ for(i=1; i<count; i++) {
+ tmp_color2.r = colors[i].r;
+ tmp_color2.g = colors[i].g;
+ tmp_color2.b = colors[i].b;
+ colors[i].r = tmp_color1.r;
+ colors[i].g = tmp_color1.g;
+ colors[i].b = tmp_color1.b;
+ tmp_color1.r = tmp_color2.r;
+ tmp_color1.g = tmp_color2.g;
+ tmp_color1.b = tmp_color2.b;
+ }
+
+}
+
+int main(void)
+{
+ int i;
+
+ struct color colors[COLOR_COUNT];
+
+ clock_setup();
+ gpio_setup();
+
+ reset_colors(colors, COLOR_COUNT);
+ init_colors(colors, COLOR_COUNT);
+
+ while (1) {
+ gpio_toggle(GPIOC, GPIO12); /* LED on/off */
+
+ send_colors(colors, COLOR_COUNT);
+
+ step_colors(colors, COLOR_COUNT);
+
+ /* Wait a little */
+ for (i = 0; i < 1000000; i++) /* Wait a bit. */
+ __asm__("nop");
+
+ }
+
+ return 0;
+}