From 623a7e73cf79ecdda28fe5d3ff429090dbae359d Mon Sep 17 00:00:00 2001
From: fishsoupisgood <github@madingley.org>
Date: Fri, 10 Jul 2020 11:08:51 +0100
Subject: make GPIO a parameter

---
 Makefile       |  5 +++++
 out-of-tree.mk |  6 ++++--
 pingid.c       | 19 ++++++++++++++-----
 3 files changed, 23 insertions(+), 7 deletions(-)

diff --git a/Makefile b/Makefile
index 7fe50e9..0da8d7d 100644
--- a/Makefile
+++ b/Makefile
@@ -1,3 +1,8 @@
+
+ifneq (${GPIO},)
+  CFLAGS+=-DGPIO=${GPIO}
+endif
+
 pingid:pingid.o
 	${CC} ${CFLAGS} ${LDFLAGS} -o $@ $< ${LIBS}
 
diff --git a/out-of-tree.mk b/out-of-tree.mk
index 524fdb6..9a65f7d 100644
--- a/out-of-tree.mk
+++ b/out-of-tree.mk
@@ -1,6 +1,8 @@
-STAGING_DIR=/home/openwrt/gl-inet-mt300n-v2/master-d20f4fc/staging_dir/toolchain-mipsel_24kc_gcc-7.3.0_musl
+#STAGING_DIR=/home/openwrt/gl-inet-mt300n-v2/master-d20f4fc/staging_dir/toolchain-mipsel_24kc_gcc-7.3.0_musl
+STAGING_DIR=/home//openwrt/gl-inet-ar300m/master-fa83455/staging_dir/toolchain-mips_24kc_gcc-8.3.0_musl/
 export STAGING_DIR
-CROSS=${STAGING_DIR}/bin/mipsel-openwrt-linux-musl-
+#CROSS=${STAGING_DIR}/bin/mipsel-openwrt-linux-musl-
+CROSS=${STAGING_DIR}/bin/mips-openwrt-linux-
 
 CC=${CROSS}gcc
 
diff --git a/pingid.c b/pingid.c
index 6e33510..0dc182a 100644
--- a/pingid.c
+++ b/pingid.c
@@ -6,6 +6,14 @@
 #include <sys/types.h>
 #include <linux/input.h>
 
+#ifndef GPIO
+#define GPIO 4
+#endif
+
+#define STRINGIFY(a) #a
+#define STRINGIFY_HARDER(a) STRINGIFY(a)
+#define GPIO_STR STRINGIFY_HARDER(GPIO)
+
 
 char *names[KEY_MAX + 1] =
   { "", "", "1", "2", "3", "4", "5", "6", "7", "8", "9", "0", "-", "=", "",
@@ -132,16 +140,17 @@ main (int argc, char *argv[])
   struct timeval tv;
   char ret[128];
 
-  squirt ("/sys/class/gpio/export", "4");
-  squirt ("/sys/class/gpio/gpio4/direction", "out");
-  squirt ("/sys/class/gpio/gpio4/value", "0");
+
+  squirt ("/sys/class/gpio/export", GPIO_STR);
+  squirt ("/sys/class/gpio/gpio" GPIO_STR "/direction", "out");
+  squirt ("/sys/class/gpio/gpio" GPIO_STR "/value", "0");
 
 
   tv.tv_sec = 0;
   tv.tv_usec = 100;
   get_string_with_timeout (fd, &tv, NULL, 0);
 
-  squirt ("/sys/class/gpio/gpio4/value", "1");
+  squirt ("/sys/class/gpio/gpio" GPIO_STR "/value", "1");
 
 
   tv.tv_sec = 2;
@@ -149,7 +158,7 @@ main (int argc, char *argv[])
 
   get_string_with_timeout (fd, &tv, ret, sizeof (ret));
 
-  squirt ("/sys/class/gpio/gpio4/value", "0");
+  squirt ("/sys/class/gpio/gpio" GPIO_STR "/value", "0");
 
   printf ("Access-Control-Allow-Origin: *\n");
   printf ("Content-Type: text/plain\n\n%s\n", ret);
-- 
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