From c89a70619e7ec76447a7e329e1971e9c1dfa1684 Mon Sep 17 00:00:00 2001
From: fishsoupisgood <github@madingley.org>
Date: Fri, 2 Oct 2020 10:14:08 +0100
Subject: fish

---
 set_color/.gitignore  |   3 +
 set_color/Makefile    |   8 ++
 set_color/set_color.c | 202 ++++++++++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 213 insertions(+)
 create mode 100644 set_color/.gitignore
 create mode 100644 set_color/Makefile
 create mode 100644 set_color/set_color.c

(limited to 'set_color')

diff --git a/set_color/.gitignore b/set_color/.gitignore
new file mode 100644
index 0000000..f48b557
--- /dev/null
+++ b/set_color/.gitignore
@@ -0,0 +1,3 @@
+*~
+*.o
+set_color
diff --git a/set_color/Makefile b/set_color/Makefile
new file mode 100644
index 0000000..8e9c91a
--- /dev/null
+++ b/set_color/Makefile
@@ -0,0 +1,8 @@
+default:set_color
+	./$<
+
+set_color:set_color.c
+
+
+clean:
+	/bin/rm -f set_color
diff --git a/set_color/set_color.c b/set_color/set_color.c
new file mode 100644
index 0000000..9dc9fdc
--- /dev/null
+++ b/set_color/set_color.c
@@ -0,0 +1,202 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Hidraw Userspace Example
+ *
+ * Copyright (c) 2010 Alan Ott <alan@signal11.us>
+ * Copyright (c) 2010 Signal 11 Software
+ *
+ * The code may be used by anyone for any purpose,
+ * and can serve as a starting point for developing
+ * applications using hidraw.
+ */
+
+/* Linux */
+#include <linux/types.h>
+#include <linux/input.h>
+#include <linux/hidraw.h>
+
+/* Unix */
+#include <sys/ioctl.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <unistd.h>
+
+/* C */
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+#include <errno.h>
+#include <stdint.h>
+
+
+typedef struct
+{
+  uint8_t r;
+  uint8_t g;
+  uint8_t b;
+} C;
+
+#define N_LEDS	9
+
+static unsigned map[N_LEDS]={2,1,0,3,4,5,8,7,6};
+
+C current[N_LEDS];
+C last[N_LEDS];
+
+
+void
+sync_leds (int fd)
+{
+  unsigned i;
+  uint8_t buf[8];
+
+  for (i = 0; i < N_LEDS; ++i)
+    {
+      /* Send a Report to the Device */
+      if ((last[i].r != current[i].r)
+          || (last[i].g != current[i].g) || (last[i].b != current[i].b))
+        {
+          buf[0] = 0x05;
+          buf[1] = map[i];
+          buf[2] = current[i].r;
+          buf[3] = current[i].g;
+          buf[4] = current[i].b;
+          write (fd, buf, 8);
+          usleep (1000);
+          last[i] = current[i];
+        }
+    }
+}
+
+unsigned f(int v)
+{
+v-=5;
+if (v<0) return 0;
+return v;
+}
+
+
+void fade_leds(int fd)
+{
+unsigned i;
+  for (i = 0; i < N_LEDS; ++i)
+    {
+	current[i].r=f(current[i].r);
+	current[i].g=f(current[i].g);
+	current[i].b=f(current[i].b);
+
+	}
+
+	sync_leds(fd);
+
+}
+
+int
+open_kb (int *fds)
+{
+  struct hidraw_devinfo info;
+  unsigned i;
+  int n = 0;
+  for (i = 0; i < 128; ++i)
+    {
+      int fd;
+      char device[128];
+      char buf[128];
+      sprintf (device, "/dev/hidraw%d", i);
+      fd = open (device, O_RDWR | O_NONBLOCK);
+      if (fd < 0)
+        continue;
+
+      memset (buf, 0, sizeof (buf));
+      ioctl (fd, HIDIOCGRAWNAME (256), buf);
+      buf[sizeof (buf) - 1] = 0;
+
+
+      if (strcmp (buf, "YMDK YMD09_32A"))
+        {
+          close (fd);
+          fd = -1;
+          continue;
+        }
+
+      fds[n++] = fd;
+
+    }
+
+
+  if (n < 2)
+    {
+      printf ("Devices not found\n");
+      return -1;
+    }
+  return 0;
+}
+
+int
+main (int argc, char **argv)
+{
+  int fds[2];
+  fd_set rfds;
+  ssize_t len;
+  char buf[32];
+  struct timeval tv;
+
+  unsigned j, k;
+
+  memset (last, 0xff, sizeof (last));
+
+  if (open_kb (fds))
+    return -1;
+
+
+current[4].g=0xff;
+
+  FD_ZERO (&rfds);
+  sync_leds (fds[1]);
+
+	tv.tv_sec=0;
+tv.tv_usec=0;
+
+  for (;;)
+    {
+      FD_SET (fds[0], &rfds);
+
+	if (!tv.tv_usec) 
+		tv.tv_usec=20000;
+	
+      switch (select (fds[0] + 1, &rfds, NULL, NULL, &tv))
+        {
+        case -1:
+          break;
+        case 1:
+
+          len = read (fds[0], buf, sizeof (buf));
+	  
+          if (len < 3)
+            break;
+
+          for (j = 2; j < len; ++j)
+            {
+	if (!buf[j]) continue;
+              k = buf[j] - 4;
+
+
+              current[k].r = rand() & 0xff ;
+              current[k].g = rand() & 0xff ;
+              current[k].b = rand() & 0xff ;
+            }
+
+          sync_leds (fds[1]);
+
+          break;
+	case 0:
+	  fade_leds(fds[1]);
+        }
+
+    }
+
+  close (fds[1]);
+  close (fds[0]);
+  return 0;
+}
-- 
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