Add basic PAL driver
This commit is contained in:
Fabio Utzig
parent
aa43fd6554
commit
4ac0b638b9
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/*
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Copyright (C) 2015 Fabio Utzig
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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/**
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* @file pal_lld.c
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* @brief NRF51822 PAL subsystem low level driver source.
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*
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* @addtogroup PAL
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* @{
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*/
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#include "osal.h"
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#include "hal.h"
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#if (HAL_USE_PAL == TRUE) || defined(__DOXYGEN__)
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/*===========================================================================*/
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/* Driver local definitions. */
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/*===========================================================================*/
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/*===========================================================================*/
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/* Driver exported variables. */
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/*===========================================================================*/
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/*===========================================================================*/
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/* Driver local variables and types. */
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/*===========================================================================*/
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/*===========================================================================*/
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/* Driver local functions. */
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/*===========================================================================*/
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void _pal_lld_setpadmode(uint8_t pad, iomode_t mode)
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{
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uint8_t value = 0;
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osalDbgAssert(pad < 32, "invalid pad");
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switch (mode) {
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case PAL_MODE_RESET:
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case PAL_MODE_UNCONNECTED:
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value = 2;
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break;
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case PAL_MODE_INPUT:
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case PAL_MODE_INPUT_ANALOG:
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value = 0;
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break;
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case PAL_MODE_INPUT_PULLUP:
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value = 0xC;
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break;
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case PAL_MODE_INPUT_PULLDOWN:
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value = 4;
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break;
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case PAL_MODE_OUTPUT_PUSHPULL:
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value = 1;
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break;
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case PAL_MODE_OUTPUT_OPENDRAIN:
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value = 0x61;
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break;
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}
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NRF_GPIO->PIN_CNF[pad] = value;
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}
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/*===========================================================================*/
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/* Driver interrupt handlers. */
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/*===========================================================================*/
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/*===========================================================================*/
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/* Driver exported functions. */
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/*===========================================================================*/
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/**
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* @brief STM32 I/O ports configuration.
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* @details Ports A-D(E, F, G, H) clocks enabled.
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*
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* @param[in] config the STM32 ports configuration
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*
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* @notapi
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*/
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void _pal_lld_init(const PALConfig *config)
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{
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uint8_t i;
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for (i = 0; i < TOTAL_GPIO_PADS; i++) {
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pal_lld_setpadmode(IOPORT1, i, config->pads[i]);
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}
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}
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/**
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* @brief Pads mode setup.
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* @details This function programs a pads group belonging to the same port
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* with the specified mode.
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*
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* @param[in] port the port identifier
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* @param[in] mask the group mask
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* @param[in] mode the mode
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*
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* @notapi
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*/
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void _pal_lld_setgroupmode(ioportid_t port,
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ioportmask_t mask,
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iomode_t mode)
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{
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uint8_t i;
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(void)mask;
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for (i = 0; i < TOTAL_GPIO_PADS; i++) {
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pal_lld_setpadmode(port, i, mode);
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}
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}
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#endif /* HAL_USE_PAL == TRUE */
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/** @} */
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@ -0,0 +1,373 @@
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/*
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Copyright (C) 2015 Fabio Utzig
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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/**
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* @file pal_lld.h
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* @brief NRF51822 PAL subsystem low level driver header.
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*
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* @addtogroup PAL
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* @{
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*/
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#ifndef _PAL_LLD_H_
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#define _PAL_LLD_H_
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#if (HAL_USE_PAL == TRUE) || defined(__DOXYGEN__)
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/*===========================================================================*/
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/* Unsupported modes and specific modes */
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/*===========================================================================*/
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/*===========================================================================*/
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/* I/O Ports Types and constants. */
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/*===========================================================================*/
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#define TOTAL_GPIO_PADS 32
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/**
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* @brief Generic I/O ports static initializer.
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* @details An instance of this structure must be passed to @p palInit() at
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* system startup time in order to initialized the digital I/O
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* subsystem. This represents only the initial setup, specific pads
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* or whole ports can be reprogrammed at later time.
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* @note Implementations may extend this structure to contain more,
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* architecture dependent, fields.
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*/
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typedef struct {
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uint32_t pads[TOTAL_GPIO_PADS];
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} PALConfig;
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/**
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* @brief Width, in bits, of an I/O port.
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*/
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#define PAL_IOPORTS_WIDTH 32U
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/**
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* @brief Whole port mask.
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* @brief This macro specifies all the valid bits into a port.
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*/
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#define PAL_WHOLE_PORT ((ioportmask_t)0xFFFFFFFFU)
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/**
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* @brief Digital I/O port sized unsigned type.
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*/
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typedef uint32_t ioportmask_t;
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/**
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* @brief Digital I/O modes.
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*/
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typedef uint32_t iomode_t;
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/**
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* @brief Port Identifier.
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* @details This type can be a scalar or some kind of pointer, do not make
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* any assumption about it, use the provided macros when populating
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* variables of this type.
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*/
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typedef uint32_t ioportid_t;
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/*===========================================================================*/
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/* I/O Ports Identifiers. */
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/*===========================================================================*/
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/**
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* @brief First I/O port identifier.
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* @details Low level drivers can define multiple ports, it is suggested to
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* use this naming convention.
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*/
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#define IOPORT1 NRF_GPIO
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/*===========================================================================*/
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/* Implementation, some of the following macros could be implemented as */
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/* functions, if so please put them in pal_lld.c. */
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/*===========================================================================*/
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void _pal_lld_setpadmode(uint8_t pad, iomode_t mode);
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/**
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* @brief Low level PAL subsystem initialization.
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*
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* @param[in] config architecture-dependent ports configuration
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*
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* @notapi
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*/
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#define pal_lld_init(config) _pal_lld_init(config)
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/**
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* @brief Reads the physical I/O port states.
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*
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* @param[in] port port identifier
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* @return The port bits.
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*
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* @notapi
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*/
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#define pal_lld_readport(port) 0U
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/**
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* @brief Reads the output latch.
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* @details The purpose of this function is to read back the latched output
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* value.
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*
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* @param[in] port port identifier
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* @return The latched logical states.
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*
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* @notapi
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*/
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#define pal_lld_readlatch(port) 0U
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/**
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* @brief Writes a bits mask on a I/O port.
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*
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* @param[in] port port identifier
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* @param[in] bits bits to be written on the specified port
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*
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* @notapi
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*/
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#define pal_lld_writeport(port, bits) \
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do { \
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(void)port; \
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(void)bits; \
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} while (false)
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/**
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* @brief Sets a bits mask on a I/O port.
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* @note The @ref PAL provides a default software implementation of this
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* functionality, implement this function if can optimize it by using
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* special hardware functionalities or special coding.
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*
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* @param[in] port port identifier
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* @param[in] bits bits to be ORed on the specified port
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*
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* @notapi
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*/
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#define pal_lld_setport(port, bits) \
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do { \
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(void)port; \
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(void)bits; \
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} while (false)
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/**
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* @brief Clears a bits mask on a I/O port.
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* @note The @ref PAL provides a default software implementation of this
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* functionality, implement this function if can optimize it by using
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* special hardware functionalities or special coding.
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*
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* @param[in] port port identifier
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* @param[in] bits bits to be cleared on the specified port
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*
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* @notapi
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*/
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#define pal_lld_clearport(port, bits) \
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do { \
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(void)port; \
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(void)bits; \
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} while (false)
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/**
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* @brief Toggles a bits mask on a I/O port.
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* @note The @ref PAL provides a default software implementation of this
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* functionality, implement this function if can optimize it by using
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* special hardware functionalities or special coding.
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*
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* @param[in] port port identifier
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* @param[in] bits bits to be XORed on the specified port
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*
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* @notapi
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*/
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#define pal_lld_toggleport(port, bits) \
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do { \
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(void)port; \
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(void)bits; \
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} while (false)
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/**
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* @brief Reads a group of bits.
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* @note The @ref PAL provides a default software implementation of this
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* functionality, implement this function if can optimize it by using
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* special hardware functionalities or special coding.
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*
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* @param[in] port port identifier
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* @param[in] mask group mask
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* @param[in] offset group bit offset within the port
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* @return The group logical states.
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*
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* @notapi
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*/
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#define pal_lld_readgroup(port, mask, offset) 0U
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/**
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* @brief Writes a group of bits.
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* @note The @ref PAL provides a default software implementation of this
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* functionality, implement this function if can optimize it by using
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* special hardware functionalities or special coding.
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*
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* @param[in] port port identifier
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* @param[in] mask group mask
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* @param[in] offset group bit offset within the port
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* @param[in] bits bits to be written. Values exceeding the group width
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* are masked.
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*
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* @notapi
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*/
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#define pal_lld_writegroup(port, mask, offset, bits) \
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do { \
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(void)port; \
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(void)mask; \
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(void)offset; \
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(void)bits; \
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} while (false)
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/**
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* @brief Pads group mode setup.
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* @details This function programs a pads group belonging to the same port
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* with the specified mode.
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* @note Programming an unknown or unsupported mode is silently ignored.
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*
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* @param[in] port port identifier
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* @param[in] mask group mask
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* @param[in] offset group bit offset within the port
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* @param[in] mode group mode
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*
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* @notapi
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*/
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#define pal_lld_setgroupmode(port, mask, offset, mode) \
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_pal_lld_setgroupmode(port, mask << offset, mode)
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/**
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* @brief Reads a logical state from an I/O pad.
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* @note The @ref PAL provides a default software implementation of this
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* functionality, implement this function if can optimize it by using
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* special hardware functionalities or special coding.
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*
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* @param[in] port port identifier
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* @param[in] pad pad number within the port
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* @return The logical state.
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* @retval PAL_LOW low logical state.
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* @retval PAL_HIGH high logical state.
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*
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* @notapi
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*/
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#define pal_lld_readpad(port, pad) PAL_LOW
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/**
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* @brief Writes a logical state on an output pad.
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* @note This function is not meant to be invoked directly by the
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* application code.
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* @note The @ref PAL provides a default software implementation of this
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* functionality, implement this function if can optimize it by using
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* special hardware functionalities or special coding.
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*
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* @param[in] port port identifier
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* @param[in] pad pad number within the port
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* @param[in] bit logical value, the value must be @p PAL_LOW or
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* @p PAL_HIGH
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*
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* @notapi
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*/
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#define pal_lld_writepad(port, pad, bit) \
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do { \
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(void)port; \
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(void)pad; \
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(void)bit; \
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} while (false)
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/**
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* @brief Sets a pad logical state to @p PAL_HIGH.
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* @note The @ref PAL provides a default software implementation of this
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* functionality, implement this function if can optimize it by using
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* special hardware functionalities or special coding.
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*
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* @param[in] port port identifier
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* @param[in] pad pad number within the port
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*
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* @notapi
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*/
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#define pal_lld_setpad(port, pad) (NRF_GPIO->OUTSET = (uint32_t) 1 << (pad))
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/**
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* @brief Clears a pad logical state to @p PAL_LOW.
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* @note The @ref PAL provides a default software implementation of this
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* functionality, implement this function if can optimize it by using
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* special hardware functionalities or special coding.
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*
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* @param[in] port port identifier
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* @param[in] pad pad number within the port
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*
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* @notapi
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*/
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#define pal_lld_clearpad(port, pad) (NRF_GPIO->OUTCLR = (uint32_t) 1 << (pad))
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/**
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* @brief Toggles a pad logical state.
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* @note The @ref PAL provides a default software implementation of this
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* functionality, implement this function if can optimize it by using
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* special hardware functionalities or special coding.
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*
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* @param[in] port port identifier
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* @param[in] pad pad number within the port
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*
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* @notapi
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*/
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#define pal_lld_togglepad(port, pad) \
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do { \
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uint8_t bit = (NRF_GPIO->IN >> (pad)) & 1; \
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if (bit) \
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NRF_GPIO->OUTCLR = 1 << (pad); \
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else \
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NRF_GPIO->OUTSET = 1 << (pad); \
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} while (0)
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/**
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* @brief Pad mode setup.
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* @details This function programs a pad with the specified mode.
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* @note The @ref PAL provides a default software implementation of this
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* functionality, implement this function if can optimize it by using
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* special hardware functionalities or special coding.
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* @note Programming an unknown or unsupported mode is silently ignored.
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*
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* @param[in] port port identifier
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* @param[in] pad pad number within the port
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* @param[in] mode pad mode
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*
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* @notapi
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*/
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#define pal_lld_setpadmode(port, pad, mode) _pal_lld_setpadmode(pad, mode)
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#if !defined(__DOXYGEN__)
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extern const PALConfig pal_default_config;
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#endif
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#ifdef __cplusplus
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extern "C" {
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#endif
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void _pal_lld_init(const PALConfig *config);
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void _pal_lld_setgroupmode(ioportid_t port,
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ioportmask_t mask,
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iomode_t mode);
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#ifdef __cplusplus
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}
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#endif
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#endif /* HAL_USE_PAL == TRUE */
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#endif /* _PAL_LLD_H_ */
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/** @} */
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@ -1,6 +1,7 @@
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# List of all the NRF51x platform files.
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PLATFORMSRC = ${CHIBIOS}/os/hal/ports/common/ARMCMx/nvic.c \
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${CHIBIOS}/community/os/hal/ports/NRF51/NRF51822/hal_lld.c \
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${CHIBIOS}/community/os/hal/ports/NRF51/NRF51822/pal_lld.c \
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${CHIBIOS}/community/os/hal/ports/NRF51/NRF51822/serial_lld.c \
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${CHIBIOS}/community/os/hal/ports/NRF51/NRF51822/st_lld.c
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