From 7baed996272cd3c889a5ab714c2b3391703f75f1 Mon Sep 17 00:00:00 2001
From: guowenxue <guowenxue@gmail.com>
Date: Sat, 23 Jan 2021 19:44:10 +0800
Subject: [PATCH] Add gpiod.c for libgpiod output sample code
---
modules/c/led.c | 68 +++++++++++++++++++++++++++++++++-
1 files changed, 66 insertions(+), 2 deletions(-)
diff --git a/modules/c/led.c b/modules/c/led.c
index 959edd8..5ef2c0c 100644
--- a/modules/c/led.c
+++ b/modules/c/led.c
@@ -28,11 +28,9 @@
#include <time.h>
#include <errno.h>
-#include <wiringPi.h>
#include "led.h"
#define msleep(x) usleep( 1000*(x) )
-
#define DELAY 500
int main(int argc, char *argv[])
@@ -60,6 +58,9 @@
return 0;
}
+#ifdef CONFIG_USE_WIRINGPI
+#include <wiringPi.h>
+
void init_led(void)
{
int i;
@@ -86,4 +87,67 @@
return 0;
}
+#else /* use libgpiod library */
+#include <gpiod.h>
+
+#if 0 /* Use libgpiod lowlevel API */
+
+struct gpiod_chip* chip;
+
+void init_led(void)
+{
+ chip = gpiod_chip_open_by_name("gpiochip0");
+ if( !chip )
+ {
+ printf("gpiod open chip failure, maybe you need running as root\n");
+ exit(1);
+ }
+}
+
+int turn_led(int which, int cmd)
+{
+ int rv = 0;
+ struct gpiod_line* line;
+
+ line = gpiod_chip_get_line(chip, led_gpio[which]);
+ if( !line )
+ {
+ rv = -2;
+ }
+
+ gpiod_line_request_output(line, "led", 0);
+
+ if( OFF == cmd )
+ {
+ gpiod_line_set_value(line, 0);
+ }
+ else
+ {
+ gpiod_line_set_value(line, 1);
+ }
+}
+
+
+#else /* use libgpiod ctxless high level API */
+void init_led(void)
+{
+
+}
+
+void gpiod_ctxless_cb(void *data)
+{
+ sleep(1);
+}
+
+int turn_led(int which, int cmd)
+{
+ if( OFF == cmd )
+ gpiod_ctxless_set_value("gpiochip0", led_gpio[which], 0, false, "led", gpiod_ctxless_cb, NULL);
+ else
+ gpiod_ctxless_set_value("gpiochip0", led_gpio[which], 1, false, "led", gpiod_ctxless_cb, NULL);
+}
+#endif
+
+
+#endif
--
Gitblit v1.9.1