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/drivers/misc/pdsp188x.c

@@ -0,0 +1,45 @@
+/*
+ * Copyright 2010 Sergey Poselenov, Emcraft Systems, <sposelenov@emcraft.com>
+ * Copyright 2010 Ilya Yanok, Emcraft Systems, <yanok@emcraft.com>
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <common.h>
+#include <led-display.h>
+#include <asm/io.h>
+
+#ifdef CONFIG_CMD_DISPLAY
+#define CWORD_CLEAR	0x80
+#define CLEAR_DELAY	(110 * 2)
+#define DISPLAY_SIZE	8
+
+static int pos; /* Current display position */
+
+/* Handle different display commands */
+void display_set(int cmd)
+{
+	if (cmd & DISPLAY_CLEAR) {
+		out_8((unsigned char *)CONFIG_SYS_DISP_CWORD, CWORD_CLEAR);
+		udelay(1000 * CLEAR_DELAY);
+	}
+
+	if (cmd & DISPLAY_HOME) {
+		pos = 0;
+	}
+}
+
+/*
+ * Display a character at the current display position.
+ * Characters beyond the display size are ignored.
+ */
+int display_putc(char c)
+{
+	if (pos >= DISPLAY_SIZE)
+		return -1;
+
+	out_8((unsigned char *)CONFIG_SYS_DISP_CHR_RAM + pos++, c);
+
+	return c;
+}
+#endif