diff options
Diffstat (limited to 'os/hal/platforms/AVR/pal_lld.c')
| -rw-r--r-- | os/hal/platforms/AVR/pal_lld.c | 134 |
1 files changed, 134 insertions, 0 deletions
diff --git a/os/hal/platforms/AVR/pal_lld.c b/os/hal/platforms/AVR/pal_lld.c new file mode 100644 index 000000000..4bfd7bd04 --- /dev/null +++ b/os/hal/platforms/AVR/pal_lld.c @@ -0,0 +1,134 @@ +/*
+ ChibiOS/RT - Copyright (C) 2006,2007,2008,2009,2010,
+ 2011 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 AVR/pal_lld.c
+ * @brief AVR GPIO low level driver code.
+ *
+ * @addtogroup PAL
+ * @{
+ */
+
+#include "ch.h"
+#include "hal.h"
+
+#if HAL_USE_PAL || defined(__DOXYGEN__)
+
+/*===========================================================================*/
+/* Driver exported variables. */
+/*===========================================================================*/
+
+/*===========================================================================*/
+/* Driver local variables. */
+/*===========================================================================*/
+
+/*===========================================================================*/
+/* Driver local functions. */
+/*===========================================================================*/
+
+/*===========================================================================*/
+/* Driver interrupt handlers. */
+/*===========================================================================*/
+
+/*===========================================================================*/
+/* Driver exported functions. */
+/*===========================================================================*/
+
+/**
+ * @brief AVR GPIO ports configuration.
+ * @details GPIO registers initialization.
+ *
+ * @param[in] config the AVR ports configuration
+ *
+ * @notapi
+ */
+void _pal_lld_init(const PALConfig *config) {
+
+#if defined(PORTA) || defined(__DOXYGEN__)
+ PORTA = config->porta.out;
+ DDRA = config->porta.dir;
+#endif
+
+#if defined(PORTB) || defined(__DOXYGEN__)
+ PORTB = config->portb.out;
+ DDRB = config->portb.dir;
+#endif
+
+#if defined(PORTC) || defined(__DOXYGEN__)
+ PORTC = config->portc.out;
+ DDRC = config->portc.dir;
+#endif
+
+#if defined(PORTD) || defined(__DOXYGEN__)
+ PORTD = config->portd.out;
+ DDRD = config->portd.dir;
+#endif
+
+#if defined(PORTE) || defined(__DOXYGEN__)
+ PORTE = config->porte.out;
+ DDRE = config->porte.dir;
+#endif
+}
+
+/**
+ * @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 output as recommended by
+ * the AVR Family User's Guide. Unconnected pads are set to input
+ * with pull-up by default.
+ *
+ * @notapi
+ *
+ * TODO: check PAL_MODE_UNCONNECTED mode recommended for AVR
+ */
+void _pal_lld_setgroupmode(ioportid_t port,
+ ioportmask_t mask,
+ iomode_t mode) {
+
+ switch (mode) {
+ case PAL_MODE_RESET:
+ case PAL_MODE_INPUT:
+ port->dir &= ~mask;
+ break;
+ case PAL_MODE_INPUT_ANALOG:
+ port->dir &= ~mask;
+ port->out &= ~mask;
+ break;
+ case PAL_MODE_UNCONNECTED:
+ case PAL_MODE_INPUT_PULLUP:
+ port->dir &= ~mask;
+ port->out |= mask;
+ case PAL_MODE_OUTPUT_PUSHPULL:
+ port->dir |= mask;
+ break;
+ }
+}
+
+#endif /* HAL_USE_PAL */
+
+/** @} */
|