241 lines
8.2 KiB
C
241 lines
8.2 KiB
C
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/*
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Copyright (C) 2018 Konstantin Oblaukhov
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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 GPIOv1/hal_pal_lld.c
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* @brief NRF5 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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* @brief Event records for the GPIOTE channels.
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*/
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palevent_t _pal_events[NRF5_GPIOTE_NUM_CHANNELS];
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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(ioportid_t port, uint8_t pad, iomode_t mode)
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{
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(void)port;
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osalDbgAssert(pad < PAL_IOPORTS_WIDTH, "pal_lld_setpadmode() - 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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IOPORT1->PIN_CNF[pad] =
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(GPIO_PIN_CNF_SENSE_Disabled << GPIO_PIN_CNF_SENSE_Pos) |
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(GPIO_PIN_CNF_DRIVE_S0S1 << GPIO_PIN_CNF_DRIVE_Pos) |
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(GPIO_PIN_CNF_PULL_Disabled << GPIO_PIN_CNF_PULL_Pos) |
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(GPIO_PIN_CNF_INPUT_Disconnect << GPIO_PIN_CNF_INPUT_Pos) |
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(GPIO_PIN_CNF_DIR_Input << GPIO_PIN_CNF_DIR_Pos);
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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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IOPORT1->PIN_CNF[pad] =
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(GPIO_PIN_CNF_SENSE_Disabled << GPIO_PIN_CNF_SENSE_Pos) |
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(GPIO_PIN_CNF_DRIVE_S0S1 << GPIO_PIN_CNF_DRIVE_Pos) |
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(GPIO_PIN_CNF_PULL_Disabled << GPIO_PIN_CNF_PULL_Pos) |
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(GPIO_PIN_CNF_INPUT_Connect << GPIO_PIN_CNF_INPUT_Pos) |
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(GPIO_PIN_CNF_DIR_Input << GPIO_PIN_CNF_DIR_Pos);
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break;
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case PAL_MODE_INPUT_PULLUP:
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IOPORT1->PIN_CNF[pad] =
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(GPIO_PIN_CNF_SENSE_Disabled << GPIO_PIN_CNF_SENSE_Pos) |
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(GPIO_PIN_CNF_DRIVE_S0S1 << GPIO_PIN_CNF_DRIVE_Pos) |
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(GPIO_PIN_CNF_PULL_Pullup << GPIO_PIN_CNF_PULL_Pos) |
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(GPIO_PIN_CNF_INPUT_Connect << GPIO_PIN_CNF_INPUT_Pos) |
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(GPIO_PIN_CNF_DIR_Input << GPIO_PIN_CNF_DIR_Pos);
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break;
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case PAL_MODE_INPUT_PULLDOWN:
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IOPORT1->PIN_CNF[pad] =
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(GPIO_PIN_CNF_SENSE_Disabled << GPIO_PIN_CNF_SENSE_Pos) |
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(GPIO_PIN_CNF_DRIVE_S0S1 << GPIO_PIN_CNF_DRIVE_Pos) |
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(GPIO_PIN_CNF_PULL_Pulldown << GPIO_PIN_CNF_PULL_Pos) |
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(GPIO_PIN_CNF_INPUT_Connect << GPIO_PIN_CNF_INPUT_Pos) |
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(GPIO_PIN_CNF_DIR_Input << GPIO_PIN_CNF_DIR_Pos);
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break;
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case PAL_MODE_OUTPUT_PUSHPULL:
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IOPORT1->PIN_CNF[pad] =
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(GPIO_PIN_CNF_SENSE_Disabled << GPIO_PIN_CNF_SENSE_Pos) |
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(GPIO_PIN_CNF_DRIVE_S0S1 << GPIO_PIN_CNF_DRIVE_Pos) |
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(GPIO_PIN_CNF_PULL_Disabled << GPIO_PIN_CNF_PULL_Pos) |
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(GPIO_PIN_CNF_INPUT_Disconnect << GPIO_PIN_CNF_INPUT_Pos) |
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(GPIO_PIN_CNF_DIR_Output << GPIO_PIN_CNF_DIR_Pos);
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break;
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case PAL_MODE_OUTPUT_OPENDRAIN:
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IOPORT1->PIN_CNF[pad] =
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(GPIO_PIN_CNF_SENSE_Disabled << GPIO_PIN_CNF_SENSE_Pos) |
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(GPIO_PIN_CNF_DRIVE_S0D1 << GPIO_PIN_CNF_DRIVE_Pos) |
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(GPIO_PIN_CNF_PULL_Disabled << GPIO_PIN_CNF_PULL_Pos) |
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(GPIO_PIN_CNF_INPUT_Disconnect << GPIO_PIN_CNF_INPUT_Pos) |
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(GPIO_PIN_CNF_DIR_Output << GPIO_PIN_CNF_DIR_Pos);
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break;
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default:
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osalDbgAssert(FALSE, "invalid pal mode");
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break;
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}
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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 NRF5 I/O ports configuration.
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*
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* @param[in] config the NRF5 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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#if PAL_USE_CALLBACKS || PAL_USE_WAIT || defined(__DOXYGEN__)
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for (i = 0; i < NRF5_GPIOTE_NUM_CHANNELS; i++) {
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_pal_init_event(i);
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}
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#endif
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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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for (i = 0; i < TOTAL_GPIO_PADS; i++, mask >>= 1) {
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if (mask & 1) {
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pal_lld_setpadmode(port, i, mode);
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}
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}
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}
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#if PAL_USE_CALLBACKS || PAL_USE_WAIT || defined(__DOXYGEN__)
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/**
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* @brief Pad event enable.
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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 event mode
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*
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* @notapi
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*/
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void _pal_lld_enablepadevent(ioportid_t port,
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iopadid_t pad,
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ioeventmode_t mode) {
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(void)port;
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int ch = NRF5_PAL_PAD_TO_EVENT(pad);
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uint32_t config = NRF_GPIOTE->CONFIG[ch];
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osalDbgAssert((((config & GPIOTE_CONFIG_PSEL_Msk) >> GPIOTE_CONFIG_PSEL_Pos) == pad) ||
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(((config & GPIOTE_CONFIG_MODE_Msk) >> GPIOTE_CONFIG_MODE_Pos) != GPIOTE_CONFIG_MODE_Event),
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"channel already in use");
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if ((mode & PAL_EVENT_MODE_RISING_EDGE) && (mode & PAL_EVENT_MODE_FALLING_EDGE))
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config |= (GPIOTE_CONFIG_POLARITY_Toggle << GPIOTE_CONFIG_POLARITY_Pos);
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else if (mode & PAL_EVENT_MODE_RISING_EDGE)
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config |= (GPIOTE_CONFIG_POLARITY_LoToHi << GPIOTE_CONFIG_POLARITY_Pos);
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else
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config |= (GPIOTE_CONFIG_POLARITY_HiToLo << GPIOTE_CONFIG_POLARITY_Pos);
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config |= (pad << GPIOTE_CONFIG_PSEL_Pos);
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config |= (GPIOTE_CONFIG_MODE_Event << GPIOTE_CONFIG_MODE_Pos);
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NRF_GPIOTE->CONFIG[ch] = config;
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NRF_GPIOTE->EVENTS_PORT = 0;
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NRF_GPIOTE->EVENTS_IN[ch] = 0;
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NRF_GPIOTE->INTENSET = (1 << ch);
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}
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/**
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* @brief Pad event disable.
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* @details This function disables previously programmed event callbacks.
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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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void _pal_lld_disablepadevent(ioportid_t port, iopadid_t pad) {
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(void)port;
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int ch = NRF5_PAL_PAD_TO_EVENT(pad);
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uint32_t config = NRF_GPIOTE->CONFIG[ch];
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if (((config & GPIOTE_CONFIG_MODE_Msk) >> GPIOTE_CONFIG_MODE_Pos) == GPIOTE_CONFIG_MODE_Event)
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{
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osalDbgAssert(((config & GPIOTE_CONFIG_PSEL_Msk) >> GPIOTE_CONFIG_PSEL_Pos) == pad,
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"channel mapped on different pad");
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NRF_GPIOTE->INTENSET &= ~(1 << ch);
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NRF_GPIOTE->CONFIG[ch] = 0;
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#if PAL_USE_CALLBACKS || PAL_USE_WAIT
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/* Callback cleared and/or thread reset.*/
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_pal_clear_event(pad);
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#endif
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}
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}
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#endif /* PAL_USE_CALLBACKS || PAL_USE_WAIT */
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#endif /* HAL_USE_PAL == TRUE */
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/** @} */
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