diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..e3a2a30
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,5 @@
+*~
+a.out
+tmp/
+example
+powerusb
diff --git a/Changelog b/Changelog
new file mode 100644
index 0000000..e69de29
diff --git a/Makefile b/Makefile
new file mode 100644
index 0000000..c27c230
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,7 @@
+CC=gcc
+CFLAGS=-Wall -g
+LDFLAGS=-lusb-1.0 -L/lib/x86_64-linux-gnu
+
+
+all:
+	$(CC) $(CFLAGS) $(LDFLAGS) powerusb.c -o powerusb
\ No newline at end of file
diff --git a/memo b/memo
new file mode 100644
index 0000000..2378bac
--- /dev/null
+++ b/memo
@@ -0,0 +1,46 @@
+PowerUSB 
+
+set power state
+
+	 on	off
+port1 	 A	B
+port2	 C	D
+port3	 E	P 
+
+get model	 0xaa -> (1:basic)
+get firmware ver 0xa7 -> 0x0201 == major:2 minor:1
+
+get port1 state  0xa1 -> 0: off, 1: on
+get port2 state	 0xa2
+get port3 state	 0xac
+
+get curr power	 0xb1
+ping	  	 0xb2
+
+
+-------------------------------------------------
+$ tail /var/log/messages
+    Mar  3 09:00:34 sango kernel: [483571.845426] usb 2-4.3: new full speed USB device number 59 using ohci_hcd
+Mar  3 09:00:34 sango kernel: [483571.965425] usb 2-4.3: New USB device found, idVendor=04d8, idProduct=003f
+Mar  3 09:00:34 sango kernel: [483571.965436] usb 2-4.3: New USB device strings: Mfr=1, Product=2, SerialNumber=0
+Mar  3 09:00:34 sango kernel: [483571.965443] usb 2-4.3: Product: Simple HID Device Demo
+Mar  3 09:00:34 sango kernel: [483571.965448] usb 2-4.3: Manufacturer: Microchip Technology Inc.
+Mar  3 09:00:34 sango kernel: [483571.978292] generic-usb 0003:04D8:003F.0027: hiddev0,hidraw2: USB HID v1.11 Device [Microchip Technology Inc. Simple HID Device Demo] on usb-0000:00:0b.0-4.3/input0
+-------------------------------------------------
+
+#define USB_VENDOR 0x04d8
+#define USB_PRODUCT 0x003f
+
+
+
+(gdb) p/x buf2
+$1 = {0x1, 0xab, 0xe2, 0x85, 0x21, 0x3c, 0x20, 0x2f, 0x87, 0xcf, 0xc1, 0x1b, 0x96, 0x8d, 0xec,
+  0xc5, 0xcd, 0xbe, 0x75, 0xb6, 0x3b, 0x98, 0xd5, 0x73, 0xc9, 0xb8, 0x87, 0xbc, 0xa7, 0x15,
+  0x53, 0x1, 0xa2, 0x9a, 0x4f, 0x1d, 0x8a, 0x1e, 0x93, 0xb9, 0x94, 0x0, 0x70, 0x49, 0x62, 0x9f,
+  0xfa, 0xf8, 0x36, 0xb8, 0x3f, 0x21, 0x80, 0xe0, 0xd5, 0xc4, 0x26, 0xf2, 0x6, 0x56, 0x2, 0x74,
+  0xed, 0x6c}
+$2 = {0x1, 0xab, 0xe2, 0x85, 0x21, 0x3c, 0x20, 0x2f, 0x87, 0xcf, 0xc1, 0x1b, 0x96, 0x8d, 0xec,
+  0xc5, 0xcd, 0xbe, 0x75, 0xb6, 0x3b, 0x98, 0xd5, 0x73, 0xc9, 0xb8, 0x87, 0xbc, 0xa7, 0x15,
+  0x53, 0x1, 0xa2, 0x9a, 0x4f, 0x1d, 0x8a, 0x1e, 0x93, 0xb9, 0x94, 0x0, 0x70, 0x49, 0x62, 0x9f,
+  0xfa, 0xf8, 0x36, 0xb8, 0x3f, 0x21, 0x80, 0xe0, 0xd5, 0xc4, 0x26, 0xf2, 0x6, 0x56, 0x2, 0x74,
+  0xed, 0x6c}
diff --git a/powerusb.c b/powerusb.c
new file mode 100644
index 0000000..e302ae0
--- /dev/null
+++ b/powerusb.c
@@ -0,0 +1,85 @@
+#include <libusb-1.0/libusb.h>
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <unistd.h>
+#include <string.h>
+
+#define USB_VENDOR_ID 0x04d8
+#define USB_PRODUCT_ID 0x003f
+#define ENDPOINT_IN 0x81
+#define ENDPOINT_OUT 0x01
+
+#define CMD_GET_MODEL 0xaa
+#define CMD_GET_FIRM_VER 0xa7
+#define CMD_GET_STATE1 0xa1
+#define CMD_GET_STATE2 0xa2
+#define CMD_GET_STATE3 0xac
+
+
+
+
+void send_cmd(struct libusb_device_handle *devh,int cmd)
+{
+  int r,i;
+  uint8_t buf[64],buf2[64];
+  int size=0;
+  printf("send_cmd:%x\n",cmd);
+
+  memset(buf, 0xff, sizeof(buf));
+  memset(buf2, 0x00, sizeof(buf));
+
+  buf[0] = cmd;
+
+  r = libusb_interrupt_transfer(devh,ENDPOINT_OUT,buf, sizeof(buf),&size, 1000);
+  if(r<0) {
+    perror("libusb_interrupt_transfer");
+    exit(1);
+  }
+  r = libusb_interrupt_transfer(devh,ENDPOINT_IN,buf2, sizeof(buf2),&size, 1000);
+
+  printf("send_cmd:read:");
+  for(i=0;i<2;i++){
+    printf("%02x",buf2[i]);
+  }
+  printf("\n");
+
+}
+
+
+int main(int argc, char **argv)
+{
+  libusb_context *ctx = NULL;
+  struct libusb_device_handle *devh = NULL;
+  int r=1;
+
+
+  r = libusb_init(&ctx);
+  if (r < 0 ) {
+    printf("usb_init:failed\n");
+    exit(1);
+  } else {
+    libusb_set_debug(ctx,3);
+    printf("init done\n");
+  }  
+
+  devh = libusb_open_device_with_vid_pid(ctx,USB_VENDOR_ID,USB_PRODUCT_ID);
+  if (devh < 0 ) {
+    printf("can't find PowerUSB device\n");
+    goto out;
+
+  } else {
+    printf("device opened\n");
+  }
+
+  send_cmd(devh,CMD_GET_MODEL);
+  send_cmd(devh,CMD_GET_FIRM_VER);
+  send_cmd(devh,CMD_GET_STATE1);
+  send_cmd(devh,CMD_GET_STATE2);
+  send_cmd(devh,CMD_GET_STATE3);
+
+ out:
+  libusb_close(devh);
+  libusb_exit(ctx);
+  exit(0);
+}