diff options
Diffstat (limited to 'os/hal/platforms/AT91SAM7/pal_lld.c')
| -rw-r--r-- | os/hal/platforms/AT91SAM7/pal_lld.c | 150 |
1 files changed, 150 insertions, 0 deletions
diff --git a/os/hal/platforms/AT91SAM7/pal_lld.c b/os/hal/platforms/AT91SAM7/pal_lld.c new file mode 100644 index 000000000..506d42d22 --- /dev/null +++ b/os/hal/platforms/AT91SAM7/pal_lld.c @@ -0,0 +1,150 @@ +/*
+ 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 AT91SAM7/pal_lld.c
+ * @brief AT91SAM7 PIO 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 AT91SAM7 I/O ports configuration.
+ * @details PIO registers initialization.
+ *
+ * @param[in] config the AT91SAM7 ports configuration
+ *
+ * @notapi
+ */
+void _pal_lld_init(const PALConfig *config) {
+
+ uint32_t ports = (1 << AT91C_ID_PIOA);
+#if (SAM7_PLATFORM == SAM7X128) || (SAM7_PLATFORM == SAM7X256) || \
+ (SAM7_PLATFORM == SAM7X512) || (SAM7_PLATFORM == SAM7A3)
+ ports |= (1 << AT91C_ID_PIOB);
+#endif
+ AT91C_BASE_PMC->PMC_PCER = ports;
+
+ /*
+ * PIOA setup.
+ */
+ AT91C_BASE_PIOA->PIO_PPUER = config->P0Data.pusr; /* Pull-up as spec.*/
+ AT91C_BASE_PIOA->PIO_PPUDR = ~config->P0Data.pusr;
+ AT91C_BASE_PIOA->PIO_PER = 0xFFFFFFFF; /* PIO enabled.*/
+ AT91C_BASE_PIOA->PIO_ODSR = config->P0Data.odsr; /* Data as specified.*/
+ AT91C_BASE_PIOA->PIO_OER = config->P0Data.osr; /* Dir. as specified.*/
+ AT91C_BASE_PIOA->PIO_ODR = ~config->P0Data.osr;
+ AT91C_BASE_PIOA->PIO_IFDR = 0xFFFFFFFF; /* Filter disabled.*/
+ AT91C_BASE_PIOA->PIO_IDR = 0xFFFFFFFF; /* Int. disabled.*/
+ AT91C_BASE_PIOA->PIO_MDDR = 0xFFFFFFFF; /* Push Pull drive.*/
+ AT91C_BASE_PIOA->PIO_ASR = 0xFFFFFFFF; /* Peripheral A.*/
+ AT91C_BASE_PIOA->PIO_OWER = 0xFFFFFFFF; /* Write enabled.*/
+
+ /*
+ * PIOB setup.
+ */
+#if (SAM7_PLATFORM == SAM7X128) || (SAM7_PLATFORM == SAM7X256) || \
+ (SAM7_PLATFORM == SAM7X512) || (SAM7_PLATFORM == SAM7A3)
+ AT91C_BASE_PIOB->PIO_PPUER = config->P1Data.pusr; /* Pull-up as spec.*/
+ AT91C_BASE_PIOB->PIO_PPUDR = ~config->P1Data.pusr;
+ AT91C_BASE_PIOB->PIO_PER = 0xFFFFFFFF; /* PIO enabled.*/
+ AT91C_BASE_PIOB->PIO_ODSR = config->P1Data.odsr; /* Data as specified.*/
+ AT91C_BASE_PIOB->PIO_OER = config->P1Data.osr; /* Dir. as specified.*/
+ AT91C_BASE_PIOB->PIO_ODR = ~config->P1Data.osr;
+ AT91C_BASE_PIOB->PIO_IFDR = 0xFFFFFFFF; /* Filter disabled.*/
+ AT91C_BASE_PIOB->PIO_IDR = 0xFFFFFFFF; /* Int. disabled.*/
+ AT91C_BASE_PIOB->PIO_MDDR = 0xFFFFFFFF; /* Push Pull drive.*/
+ AT91C_BASE_PIOB->PIO_ASR = 0xFFFFFFFF; /* Peripheral A.*/
+ AT91C_BASE_PIOB->PIO_OWER = 0xFFFFFFFF; /* Write enabled.*/
+#endif
+}
+
+/**
+ * @brief Pads mode setup.
+ * @details This function programs a pads group belonging to the same port
+ * with the specified mode.
+ * @note This function is not meant to be invoked directly from the
+ * application code.
+ * @note @p PAL_MODE_RESET is implemented as input with pull-up.
+ * @note @p PAL_MODE_UNCONNECTED is implemented as push pull output with
+ * high state.
+ * @note @p PAL_MODE_OUTPUT_OPENDRAIN also enables the pull-up resistor.
+ *
+ * @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_PULLUP:
+ port->PIO_PPUER = mask;
+ port->PIO_ODR = mask;
+ break;
+ case PAL_MODE_INPUT:
+ case PAL_MODE_INPUT_ANALOG:
+ port->PIO_PPUDR = mask;
+ port->PIO_ODR = mask;
+ break;
+ case PAL_MODE_UNCONNECTED:
+ port->PIO_SODR = mask;
+ /* Falls in */
+ case PAL_MODE_OUTPUT_PUSHPULL:
+ port->PIO_PPUDR = mask;
+ port->PIO_OER = mask;
+ port->PIO_MDDR = mask;
+ break;
+ case PAL_MODE_OUTPUT_OPENDRAIN:
+ port->PIO_PPUER = mask;
+ port->PIO_OER = mask;
+ port->PIO_MDER = mask;
+ }
+}
+
+#endif /* HAL_USE_PAL */
+
+/** @} */
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