diff options
Diffstat (limited to 'os/hal/platforms/LPC122x/pal_lld.c')
| -rw-r--r-- | os/hal/platforms/LPC122x/pal_lld.c | 154 |
1 files changed, 154 insertions, 0 deletions
diff --git a/os/hal/platforms/LPC122x/pal_lld.c b/os/hal/platforms/LPC122x/pal_lld.c new file mode 100644 index 000000000..c23608a75 --- /dev/null +++ b/os/hal/platforms/LPC122x/pal_lld.c @@ -0,0 +1,154 @@ +/*
+ ChibiOS/RT - Copyright (C) 2006-2013 Giovanni Di Sirio
+
+ Licensed under the Apache License, Version 2.0 (the "License");
+ you may not use this file except in compliance with the License.
+ You may obtain a copy of the License at
+
+ http://www.apache.org/licenses/LICENSE-2.0
+
+ Unless required by applicable law or agreed to in writing, software
+ distributed under the License is distributed on an "AS IS" BASIS,
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ See the License for the specific language governing permissions and
+ limitations under the License.
+*/
+
+
+/**
+ * @file LPC122x/pal_lld.c
+ * @brief LPC122x 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 and types. */
+/*===========================================================================*/
+
+/*===========================================================================*/
+/* Driver local functions. */
+/*===========================================================================*/
+
+/*===========================================================================*/
+/* Driver interrupt handlers. */
+/*===========================================================================*/
+
+/*===========================================================================*/
+/* Driver exported functions. */
+/*===========================================================================*/
+/**
+ * @brief LPC122x I/O ports configuration.
+ * @details GPIO unit registers initialization.
+ *
+ * @param[in] config the LPC122x ports configuration
+ *
+ * @notapi
+ */
+void _pal_lld_init(const PALConfig *config) {
+
+ LPC_GPIO0->DIR = config->P0.dir;
+ LPC_GPIO1->DIR = config->P1.dir;
+ LPC_GPIO2->DIR = config->P2.dir;
+ LPC_GPIO0->MASK = 0;
+ LPC_GPIO1->MASK = 0;
+ LPC_GPIO2->MASK = 0;
+ LPC_GPIO0->OUT = config->P0.data;
+ LPC_GPIO1->OUT = config->P1.data;
+ LPC_GPIO2->OUT = config->P2.data;
+}
+
+/**
+ * @brief Reads a group of bits.
+ * @note The @ref PAL provides a default software implementation of this
+ * functionality, implement this function if can optimize it by using
+ * special hardware functionalities or special coding.
+ *
+ * @param[in] port port identifier
+ * @param[in] mask group mask
+ * @param[in] offset group bit offset within the port
+ * @return The group logical states.
+ *
+ * @notapi
+ */
+uint32_t _pal_lld_readgroup(ioportid_t port,
+ ioportmask_t mask,
+ uint32_t offset) {
+
+ uint32_t p;
+
+ port->MASK = ~((mask) << offset);
+ p = port->PIN;
+ port->MASK = 0;
+ return p;
+}
+
+/**
+ * @brief Writes a group of bits.
+ * @note The @ref PAL provides a default software implementation of this
+ * functionality, implement this function if can optimize it by using
+ * special hardware functionalities or special coding.
+ *
+ * @param[in] port port identifier
+ * @param[in] mask group mask
+ * @param[in] offset group bit offset within the port
+ * @param[in] bits bits to be written. Values exceeding the group width
+ * are masked.
+ *
+ * @notapi
+ */
+void _pal_lld_writegroup(ioportid_t port,
+ ioportmask_t mask,
+ uint32_t offset,
+ uint32_t bits) {
+
+ port->MASK = ~((mask) << offset);
+ port->OUT = bits;
+ port->MASK = 0;
+}
+
+/**
+ * @brief Pads mode setup.
+ * @details This function programs a pads group belonging to the same port
+ * with the specified mode.
+ * @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.
+ *
+ * @param[in] port the port identifier
+ * @param[in] mask the group mask
+ * @param[in] mode the mode
+ *
+ * @notapi
+ */
+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_UNCONNECTED:
+ palSetPort(port, PAL_WHOLE_PORT);
+ case PAL_MODE_OUTPUT_PUSHPULL:
+ port->DIR |= mask;
+ break;
+ }
+}
+
+#endif /* HAL_USE_PAL */
+
+/** @} */
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