From a2335a9d746133ff653bf7bfa3ffa69b06c72992 Mon Sep 17 00:00:00 2001
From: Amy Gale Ruth Bowersox <amy@erbosoft.com>
Date: Fri, 29 Nov 2019 02:05:30 -0700
Subject: [PATCH] ready to test GPIO code

---
 src/Makefile |  8 ++++++++
 src/gpio.c   |  1 +
 src/gpio.h   |  8 ++++++++
 src/main.c   | 16 ++++++++++++++++
 4 files changed, 33 insertions(+)
 create mode 100644 src/Makefile
 create mode 100644 src/gpio.h
 create mode 100644 src/main.c

diff --git a/src/Makefile b/src/Makefile
new file mode 100644
index 0000000..ca829a2
--- /dev/null
+++ b/src/Makefile
@@ -0,0 +1,8 @@
+OBJS=main.o log.o gpio.o
+LIBS=
+
+upiwin: $(OBJS)
+	gcc -o upiwin $(OBJS) $(LIBS)
+
+.c.o:
+	gcc -c $(CFLAGS) $<
diff --git a/src/gpio.c b/src/gpio.c
index 65df20f..76f2cc1 100644
--- a/src/gpio.c
+++ b/src/gpio.c
@@ -3,6 +3,7 @@
 #include <fcntl.h>
 #include <sys/mman.h>
 #include "log.h"
+#include "gpio.h"
 
 #define GLINE_BUTTON1  17
 #define GLINE_BUTTON2  22
diff --git a/src/gpio.h b/src/gpio.h
new file mode 100644
index 0000000..a1d48b7
--- /dev/null
+++ b/src/gpio.h
@@ -0,0 +1,8 @@
+#ifndef __GPIO_H_INCLUDED
+#define __GPIO_H_INCLUDED
+
+extern int Gpio_setup(void);
+extern void Gpio_cleanup(void);
+extern int Gpio_poll_buttons(void);
+
+#endif /* __GPIO_H_INCLUDED */
diff --git a/src/main.c b/src/main.c
new file mode 100644
index 0000000..8275d52
--- /dev/null
+++ b/src/main.c
@@ -0,0 +1,16 @@
+#include <stdlib.h>
+#include "gpio.h"
+#include "log.h"
+
+int main(int argc, char *argv[])
+{
+  if (Gpio_setup() != 0)
+    return EXIT_FAILURE;
+  atexit(Gpio_cleanup);
+
+  log(LINFO, "System ready.");
+
+  for (;;) {
+    Gpio_poll_buttons();
+  }
+}