avionic design with actual uboot and tooling

submodule of avionic design uboot bootloader and with included tools to
get you started , read readme.md and readme-tk1-loader.md

u-boot/board/atmel/at91rm9200ek/led.c

@@ -0,0 +1,72 @@
+/*
+ * (C) Copyright 2006
+ * Atmel Nordic AB <www.atmel.com>
+ * Ulf Samuelsson <ulf@atmel.com>
+ *
+ * (C) Copyright 2010
+ * Andreas Bießmann <andreas@biessmann.org>
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <common.h>
+#include <asm/io.h>
+#include <asm/arch/hardware.h>
+#include <asm/arch/clk.h>
+#include <asm/arch/at91_pio.h>
+#include <status_led.h>
+
+/* bit mask in PIO port B */
+#define	GREEN_LED	(1<<0)
+#define	YELLOW_LED	(1<<1)
+#define	RED_LED		(1<<2)
+
+void	green_led_on(void)
+{
+	at91_pio_t *pio = (at91_pio_t *)ATMEL_BASE_PIO;
+	writel(GREEN_LED, &pio->piob.codr);
+}
+
+void	 yellow_led_on(void)
+{
+	at91_pio_t *pio = (at91_pio_t *)ATMEL_BASE_PIO;
+	writel(YELLOW_LED, &pio->piob.codr);
+}
+
+void	 red_led_on(void)
+{
+	at91_pio_t *pio = (at91_pio_t *)ATMEL_BASE_PIO;
+	writel(RED_LED, &pio->piob.codr);
+}
+
+void	green_led_off(void)
+{
+	at91_pio_t *pio = (at91_pio_t *)ATMEL_BASE_PIO;
+	writel(GREEN_LED, &pio->piob.sodr);
+}
+
+void	yellow_led_off(void)
+{
+	at91_pio_t *pio = (at91_pio_t *)ATMEL_BASE_PIO;
+	writel(YELLOW_LED, &pio->piob.sodr);
+}
+
+void	red_led_off(void)
+{
+	at91_pio_t *pio = (at91_pio_t *)ATMEL_BASE_PIO;
+	writel(RED_LED, &pio->piob.sodr);
+}
+
+void coloured_LED_init (void)
+{
+	at91_pio_t *pio = (at91_pio_t *)ATMEL_BASE_PIO;
+
+	at91_periph_clk_enable(ATMEL_ID_PIOB);
+
+	/* Disable peripherals on LEDs */
+	writel(GREEN_LED | YELLOW_LED | RED_LED, &pio->piob.per);
+	/* Enable pins as outputs */
+	writel(GREEN_LED | YELLOW_LED | RED_LED, &pio->piob.oer);
+	/* Turn all LEDs OFF */
+	writel(GREEN_LED | YELLOW_LED | RED_LED, &pio->piob.sodr);
+}