diff -r 52036efdf1e3 -r 32136215c1fa tool/MasterDevice.cpp
--- a/tool/MasterDevice.cpp	Fri Mar 05 13:44:57 2010 +0100
+++ b/tool/MasterDevice.cpp	Fri Mar 05 15:32:56 2010 +0100
@@ -528,7 +528,7 @@
 
 /****************************************************************************/
 
-void MasterDevice::readSoe(ec_ioctl_slave_soe_t *data)
+void MasterDevice::readSoe(ec_ioctl_slave_soe_read_t *data)
 {
     if (ioctl(fd, EC_IOCTL_SLAVE_SOE_READ, data) < 0) {
         if (errno == EIO && data->error_code) {
@@ -541,4 +541,19 @@
     }
 }
 
+/****************************************************************************/
+
+void MasterDevice::writeSoe(ec_ioctl_slave_soe_write_t *data)
+{
+    if (ioctl(fd, EC_IOCTL_SLAVE_SOE_WRITE, data) < 0) {
+        if (errno == EIO && data->error_code) {
+            throw MasterDeviceSoeException(data->error_code);
+        } else {
+            stringstream err;
+            err << "Failed to write IDN: " << strerror(errno);
+            throw MasterDeviceException(err);
+        }
+    }
+}
+
 /*****************************************************************************/