diff --git a/fw/atspi/ep0.c b/fw/atspi/ep0.c
index 55ea23e..4d457b8 100644
--- a/fw/atspi/ep0.c
+++ b/fw/atspi/ep0.c
@@ -211,7 +211,6 @@ static __bit my_setup(struct setup_request *setup) __reentrant
 		nSS = 1;
 		usb_send(&ep0, buf, size, NULL, NULL);
 		return 1;
-#endif
 
 	default:
 		error("Unrecognized SETUP: 0x%02x 0x%02x ...\n",
diff --git a/fw/atspi/at86rf230.h b/fw/include/at86rf230.h
similarity index 84%
rename from fw/atspi/at86rf230.h
rename to fw/include/at86rf230.h
index e0f2701..f4887a7 100644
--- a/fw/atspi/at86rf230.h
+++ b/fw/include/at86rf230.h
@@ -26,4 +26,11 @@ enum at86rf230_spi_cmd {
 #define	MAX_PSDU	127	/* octets, see AT86RF230 manual section 8.1  */
 #define	SRAM_SIZE	128
 
+enum at86rf230_regs {
+	AT86RF230_REG_PART_NUM		= 0x1c,
+	AT86RF230_REG_VERSION_NUM	= 0x1d,
+	AT86RF230_REG_MAN_ID_0		= 0x1e,
+	AT86RF230_REG_MAN_ID_1		= 0x1f,
+};
+
 #endif /* !AT86RF230_H */
diff --git a/tools/atspi-id/Makefile b/tools/atspi-id/Makefile
index 0afa6d8..51118cb 100644
--- a/tools/atspi-id/Makefile
+++ b/tools/atspi-id/Makefile
@@ -14,8 +14,8 @@
 F32XBASE = ../../../f32xbase
 
 MAIN = atspi-id
-OBJS = $(F32XBASE)/lib/usb.o
 
 include $(F32XBASE)/lib/Makefile.common
 
-CFLAGS += -I$(F32XBASE)/include -I../../fw/include
+CFLAGS += -I../../fw/include -I../include
+LDLIBS += -L../lib -latspi
diff --git a/tools/atspi-id/atspi-id.c b/tools/atspi-id/atspi-id.c
index 88b5fe6..de6a085 100644
--- a/tools/atspi-id/atspi-id.c
+++ b/tools/atspi-id/atspi-id.c
@@ -13,10 +13,10 @@
 
 #include <stdlib.h>
 #include <stdio.h>
+#include <usb.h>
 
-#include "f32xbase/usb.h"
 #include "atspi/ep0.h"
-#include "atspi/usb-ids.h"
+#include "atspi.h"
 
 
 #define	FROM_DEV	ATSPI_FROM_DEV(0)
@@ -101,11 +101,9 @@ int main(int argc, const char **argv)
 
 	if (argc != 1)
 		usage(*argv);
-	dev = open_usb(USB_VENDOR, USB_PRODUCT);
-	if (!dev) {
-		fprintf(stderr, ":-(\n");
+	dev = atspi_open();
+	if (!dev)
 		return 1;
-	}
 
 	show_info(dev);
 
diff --git a/tools/include/atspi.h b/tools/include/atspi.h
new file mode 100644
index 0000000..88206eb
--- /dev/null
+++ b/tools/include/atspi.h
@@ -0,0 +1,18 @@
+#ifndef ATSPI_H
+#define	ATSPI_H
+
+
+#include <stdint.h>
+#include <usb.h>
+
+
+int atspi_error(void);
+int atspi_clear_error(void);
+
+usb_dev_handle *atspi_open(void);
+void atspi_close(usb_dev_handle *dev);
+
+void atspi_reg_write(usb_dev_handle *dev, uint8_t reg, uint8_t value);
+uint8_t atspi_reg_read(usb_dev_handle *dev, uint8_t reg);
+
+#endif /* !ATSPI_H */
diff --git a/tools/lib/Makefile b/tools/lib/Makefile
new file mode 100644
index 0000000..f48255b
--- /dev/null
+++ b/tools/lib/Makefile
@@ -0,0 +1,32 @@
+#
+# lib/Makefile - Build the ATSPI library
+#
+# Written 2010 by Werner Almesberger
+# Copyright 2010 Werner Almesberger
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2 of the License, or
+# (at your option) any later version.
+#
+
+
+F32XBASE = ../../../f32xbase
+
+LIB = libatspi.a
+
+CFLAGS = -Wall -I$(F32XBASE)/include -I../../fw/include -I../include
+OBJS = $(F32XBASE)/lib/usb.o atspi.o
+
+.PHONY:		all clean spotless
+
+all:		$(LIB)
+
+$(LIB):		$(OBJS)
+		$(AR) cr $@ $^
+
+clean:
+		rm -f $(OBJS)
+
+spotless:	clean
+		rm -f $(LIB)
diff --git a/tools/lib/atspi.c b/tools/lib/atspi.c
new file mode 100644
index 0000000..4e8e845
--- /dev/null
+++ b/tools/lib/atspi.c
@@ -0,0 +1,108 @@
+/*
+ * lib/atspi.c - ATSPI access functions library
+ *
+ * Written 2010 by Werner Almesberger
+ * Copyright 2010 Werner Almesberger
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ */
+
+
+#include <stdio.h>
+#include <usb.h>
+
+#include "f32xbase/usb.h"
+#include "atspi/ep0.h"
+#include "atspi/usb-ids.h"
+
+#include "atspi.h"
+
+
+#define FROM_DEV	ATSPI_FROM_DEV(0)
+#define TO_DEV		ATSPI_TO_DEV(0)
+
+
+/* ----- error handling ---------------------------------------------------- */
+
+
+static int error;
+
+
+int atspi_error(void)
+{
+	return error;
+}
+
+
+int atspi_clear_error(void)
+{
+	int ret;
+
+	ret = error;
+	error = 0;
+	return ret;
+}
+
+
+/* ----- open/close -------------------------------------------------------- */
+
+
+usb_dev_handle *atspi_open(void)
+{
+	usb_dev_handle *dev;
+
+	dev = open_usb(USB_VENDOR, USB_PRODUCT);
+	if (dev) {
+		error = 0;
+	} else {
+		fprintf(stderr, ":-(\n");
+		error = 1;
+	}
+	return dev;
+}
+
+
+void atspi_close(usb_dev_handle *dev)
+{
+	/* to do */
+}
+
+
+/* ----- register access --------------------------------------------------- */
+
+
+void atspi_reg_write(usb_dev_handle *dev, uint8_t reg, uint8_t value)
+{
+	int res;
+
+	if (error)
+		return;
+
+	res = usb_control_msg(dev, TO_DEV, ATSPI_REG_WRITE, value, reg,
+	    NULL, 0, 1000);
+	if (res < 0) {
+		fprintf(stderr, "ATSPI_REG_WRITE: %d\n", res);
+		error = 1;
+	}
+}
+
+
+uint8_t atspi_reg_read(usb_dev_handle *dev, uint8_t reg)
+{
+	uint8_t value = 0;
+	int res;
+
+	if (error)
+		return 0;
+
+	res = usb_control_msg(dev, FROM_DEV, ATSPI_REG_READ, 0, reg,
+	    (void *) &value, 1, 1000);
+	if (res < 0) {
+		fprintf(stderr, "ATSPI_REG_READ: %d\n", res);
+		error = 1;
+	}
+	return value;
+}