From 42eff60714a32942b307d6b139aa400ca0df296a Mon Sep 17 00:00:00 2001
From: Clyne Sullivan <tullivan99@gmail.com>
Date: Fri, 30 Nov 2018 10:51:10 -0500
Subject: libgpio, better initrd structure

---
 src/initrd/Makefile   |  25 +++++++++++++++++++++++++
 src/initrd/files/init | Bin 0 -> 12788 bytes
 src/initrd/init.c     |  24 ++++++++++++++++++++++++
 3 files changed, 49 insertions(+)
 create mode 100644 src/initrd/Makefile
 create mode 100755 src/initrd/files/init
 create mode 100644 src/initrd/init.c

(limited to 'src/initrd')

diff --git a/src/initrd/Makefile b/src/initrd/Makefile
new file mode 100644
index 0000000..82785f4
--- /dev/null
+++ b/src/initrd/Makefile
@@ -0,0 +1,25 @@
+##
+# A simple Makefile for building executables loadable by stmos.
+#
+
+CC = gcc -mcpu=cortex-m4 -mthumb -fsigned-char
+CFLAGS = -Os -fPIE -I../libgpio
+
+CFILES = $(wildcard *.c)
+OFILES = $(patsubst %.c, files/%, $(CFILES))
+
+all: $(OFILES)
+	@../../tools/rba initrd.img $$(find files/*)
+	@$(CROSS)$(OBJCOPY) -B arm -I binary -O elf32-littlearm initrd.img \
+		initrd.img.o
+
+files/%: %.c
+	@echo "  CC     " $<
+	@$(CROSS)$(CC) $(CFLAGS) $< ../libgpio/libgpio.a -o $@
+	@$(CROSS)strip $@
+
+clean:
+	@echo "  CLEAN"
+	@rm -f $(OFILES)
+	@rm -f initrd.img initrd.img.o
+
diff --git a/src/initrd/files/init b/src/initrd/files/init
new file mode 100755
index 0000000..13ce410
Binary files /dev/null and b/src/initrd/files/init differ
diff --git a/src/initrd/init.c b/src/initrd/init.c
new file mode 100644
index 0000000..dc88ff8
--- /dev/null
+++ b/src/initrd/init.c
@@ -0,0 +1,24 @@
+/**
+ * @file test.c
+ * Basic userland code to be loaded by stmos for program load testing.
+ */
+
+#include <stdio.h>
+#include <gpio.h>
+#include <syscalls.h>
+
+int main(void)
+{
+	gpioMode(5, OUTPUT);
+
+	printf("Hello, world!\n");
+
+	while (1) {
+		gpioWrite(5, 1);
+		delay(1000);
+		gpioWrite(5, 0);
+		delay(500);
+	}
+	return 0;
+}
+
-- 
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