From e5382e43fcc8d143db24d80833a02b44b9c0b78e Mon Sep 17 00:00:00 2001
From: John Ogness <john.ogness@linutronix.de>
Date: Fri, 15 Feb 2019 12:50:06 +0106
Subject: schulung_tools: leds: add Qt leds application for host

The leds application runs on the host and is used to simulate
PCI hardware with 3 LEDs. See the README for information about
how to build and use it.

Signed-off-by: John Ogness <john.ogness@linutronix.de>
---
 schulung_tools/leds/leds.cpp | 52 ++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 52 insertions(+)
 create mode 100644 schulung_tools/leds/leds.cpp

(limited to 'schulung_tools/leds/leds.cpp')

diff --git a/schulung_tools/leds/leds.cpp b/schulung_tools/leds/leds.cpp
new file mode 100644
index 0000000..2ac7a99
--- /dev/null
+++ b/schulung_tools/leds/leds.cpp
@@ -0,0 +1,52 @@
+#include "leds.h"
+#include "ui_leds.h"
+
+#include <stdio.h>
+#include <sys/mman.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <fcntl.h>
+
+void Leds::poll_shm(void) {
+    for (int i = 0; i < 3; i++) {
+        radioButton[i]->setChecked(shm->leds[i]);
+    }
+}
+
+Leds::Leds(QWidget *parent) :
+    QMainWindow(parent),
+    ui(new Ui::Leds)
+{
+}
+
+int Leds::init(void) {
+    int fd = open("/dev/shm/ivshmem", O_RDONLY);
+    if (fd == -1) {
+        fprintf(stderr, "open shm failed!");
+        return -1;
+    }
+
+    shm = (struct ivmshmem *) mmap(NULL, 1024, PROT_READ, MAP_PRIVATE, fd, 0);
+    if (shm == MAP_FAILED) {
+        fprintf(stderr, "map shm failed!");
+        return -1;
+    }
+
+    ui->setupUi(this);
+
+    radioButton[0] = ui->radioButton_1;
+    radioButton[1] = ui->radioButton_2;
+    radioButton[2] = ui->radioButton_3;
+
+    timer.setInterval(10);
+    connect(&timer, SIGNAL(timeout()), this, SLOT(poll_shm()));
+    timer.start();
+
+    return 0;
+}
+
+Leds::~Leds()
+{
+    timer.stop();
+    delete ui;
+}
-- 
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