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diff --git a/os/hal/platforms/Win32/pal_lld.c b/os/hal/platforms/Win32/pal_lld.c
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+/*
+ ChibiOS/RT - Copyright (C) 2006,2007,2008,2009,2010 Giovanni Di Sirio.
+
+ This file is part of ChibiOS/RT.
+
+ ChibiOS/RT 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 3 of the License, or
+ (at your option) any later version.
+
+ ChibiOS/RT is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>.
+*/
+
+/**
+ * @file Win32/pal_lld.c
+ * @brief Win32 low level simulated PAL driver code.
+ *
+ * @addtogroup WIN32_PAL
+ * @{
+ */
+
+#include "ch.h"
+#include "hal.h"
+
+#if CH_HAL_USE_PAL || defined(__DOXYGEN__)
+
+/*===========================================================================*/
+/* Driver exported variables. */
+/*===========================================================================*/
+
+/**
+ * @brief VIO1 simulated port.
+ */
+sim_vio_port_t vio_port_1;
+
+/**
+ * @brief VIO2 simulated port.
+ */
+sim_vio_port_t vio_port_2;
+
+/*===========================================================================*/
+/* Driver local variables. */
+/*===========================================================================*/
+
+/*===========================================================================*/
+/* Driver local functions. */
+/*===========================================================================*/
+
+/*===========================================================================*/
+/* Driver interrupt handlers. */
+/*===========================================================================*/
+
+/*===========================================================================*/
+/* Driver exported functions. */
+/*===========================================================================*/
+
+/**
+ * @brief Pads mode setup.
+ * @details This function programs a pads group belonging to the same port
+ * with the specified mode.
+ *
+ * @param[in] port the port identifier
+ * @param[in] mask the group mask
+ * @param[in] mode the mode
+ *
+ * @note This function is not meant to be invoked directly by the application
+ * code.
+ * @note @p PAL_MODE_UNCONNECTED is implemented as push pull output with high
+ * state.
+ * @note This function does not alter the @p PINSELx registers. Alternate
+ * functions setup must be handled by device-specific code.
+ */
+void _pal_lld_setgroupmode(ioportid_t port,
+ ioportmask_t mask,
+ uint_fast8_t mode) {
+
+ switch (mode) {
+ case PAL_MODE_RESET:
+ case PAL_MODE_INPUT:
+ port->dir &= ~mask;
+ break;
+ case PAL_MODE_UNCONNECTED:
+ port->latch |= mask;
+ case PAL_MODE_OUTPUT_PUSHPULL:
+ port->dir |= mask;
+ break;
+ }
+}
+
+#endif /* CH_HAL_USE_PAL */
+
+/** @} */