169 lines
5.0 KiB
C
169 lines
5.0 KiB
C
/*
|
|
Copyright (C) 2015 Stephen Caudle
|
|
|
|
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 NRF51822/ext_lld.c
|
|
* @brief NRF51822 EXT subsystem low level driver source.
|
|
*
|
|
* @addtogroup EXT
|
|
* @{
|
|
*/
|
|
|
|
#include "hal.h"
|
|
|
|
#if HAL_USE_EXT || defined(__DOXYGEN__)
|
|
|
|
#include "hal_ext_lld_isr.h"
|
|
|
|
/*===========================================================================*/
|
|
/* Driver local definitions. */
|
|
/*===========================================================================*/
|
|
|
|
/*===========================================================================*/
|
|
/* Driver exported variables. */
|
|
/*===========================================================================*/
|
|
|
|
/**
|
|
* @brief EXTD1 driver identifier.
|
|
*/
|
|
EXTDriver EXTD1;
|
|
|
|
/*===========================================================================*/
|
|
/* Driver local variables and types. */
|
|
/*===========================================================================*/
|
|
|
|
/*===========================================================================*/
|
|
/* Driver local functions. */
|
|
/*===========================================================================*/
|
|
|
|
/*===========================================================================*/
|
|
/* Driver interrupt handlers. */
|
|
/*===========================================================================*/
|
|
|
|
/*===========================================================================*/
|
|
/* Driver exported functions. */
|
|
/*===========================================================================*/
|
|
|
|
/**
|
|
* @brief Low level EXT driver initialization.
|
|
*
|
|
* @notapi
|
|
*/
|
|
void ext_lld_init(void) {
|
|
|
|
/* Driver initialization.*/
|
|
extObjectInit(&EXTD1);
|
|
}
|
|
|
|
/**
|
|
* @brief Configures and activates the EXT peripheral.
|
|
*
|
|
* @param[in] extp pointer to the @p EXTDriver object
|
|
*
|
|
* @notapi
|
|
*/
|
|
void ext_lld_start(EXTDriver *extp) {
|
|
|
|
unsigned i;
|
|
|
|
ext_lld_exti_irq_enable();
|
|
|
|
/* Configuration of automatic channels.*/
|
|
for (i = 0; i < EXT_MAX_CHANNELS; i++) {
|
|
uint32_t config = 0;
|
|
uint32_t pad = (extp->config->channels[i].mode & EXT_MODE_GPIO_MASK)
|
|
>> EXT_MODE_GPIO_OFFSET;
|
|
|
|
if (extp->config->channels[i].mode & EXT_CH_MODE_BOTH_EDGES)
|
|
config |= (GPIOTE_CONFIG_POLARITY_Toggle << GPIOTE_CONFIG_POLARITY_Pos);
|
|
else if (extp->config->channels[i].mode & EXT_CH_MODE_RISING_EDGE)
|
|
config |= (GPIOTE_CONFIG_POLARITY_LoToHi << GPIOTE_CONFIG_POLARITY_Pos);
|
|
else
|
|
config |= (GPIOTE_CONFIG_POLARITY_HiToLo << GPIOTE_CONFIG_POLARITY_Pos);
|
|
|
|
config |= (pad << GPIOTE_CONFIG_PSEL_Pos);
|
|
|
|
NRF_GPIOTE->CONFIG[i] = config;
|
|
NRF_GPIOTE->EVENTS_PORT = 0;
|
|
NRF_GPIOTE->EVENTS_IN[i] = 0;
|
|
|
|
if (extp->config->channels[i].mode & EXT_CH_MODE_AUTOSTART)
|
|
ext_lld_channel_enable(extp, i);
|
|
else
|
|
ext_lld_channel_disable(extp, i);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* @brief Deactivates the EXT peripheral.
|
|
*
|
|
* @param[in] extp pointer to the @p EXTDriver object
|
|
*
|
|
* @notapi
|
|
*/
|
|
void ext_lld_stop(EXTDriver *extp) {
|
|
|
|
unsigned i;
|
|
|
|
(void)extp;
|
|
ext_lld_exti_irq_disable();
|
|
|
|
for (i = 0; i < EXT_MAX_CHANNELS; i++)
|
|
NRF_GPIOTE->CONFIG[i] = 0;
|
|
|
|
NRF_GPIOTE->INTENCLR =
|
|
(GPIOTE_INTENCLR_IN3_Msk | GPIOTE_INTENCLR_IN2_Msk |
|
|
GPIOTE_INTENCLR_IN1_Msk | GPIOTE_INTENCLR_IN0_Msk);
|
|
}
|
|
|
|
/**
|
|
* @brief Enables an EXT channel.
|
|
*
|
|
* @param[in] extp pointer to the @p EXTDriver object
|
|
* @param[in] channel channel to be enabled
|
|
*
|
|
* @notapi
|
|
*/
|
|
void ext_lld_channel_enable(EXTDriver *extp, expchannel_t channel) {
|
|
|
|
uint32_t config = NRF_GPIOTE->CONFIG[channel] & ~GPIOTE_CONFIG_MODE_Msk;
|
|
|
|
(void)extp;
|
|
config |= (GPIOTE_CONFIG_MODE_Event << GPIOTE_CONFIG_MODE_Pos);
|
|
|
|
NRF_GPIOTE->CONFIG[channel] = config;
|
|
NRF_GPIOTE->INTENSET = (1 << channel);
|
|
}
|
|
|
|
/**
|
|
* @brief Disables an EXT channel.
|
|
*
|
|
* @param[in] extp pointer to the @p EXTDriver object
|
|
* @param[in] channel channel to be disabled
|
|
*
|
|
* @notapi
|
|
*/
|
|
void ext_lld_channel_disable(EXTDriver *extp, expchannel_t channel) {
|
|
|
|
(void)extp;
|
|
NRF_GPIOTE->CONFIG[channel] &= ~GPIOTE_CONFIG_MODE_Msk;
|
|
NRF_GPIOTE->INTENCLR = (1 << channel);
|
|
}
|
|
|
|
#endif /* HAL_USE_EXT */
|
|
|
|
/** @} */
|