/** * Copyright (c) 2015 - 2019, Nordic Semiconductor ASA * * All rights reserved. * * Redistribution and use in source and binary forms, with or without modification, * are permitted provided that the following conditions are met: * * 1. Redistributions of source code must retain the above copyright notice, this * list of conditions and the following disclaimer. * * 2. Redistributions in binary form, except as embedded into a Nordic * Semiconductor ASA integrated circuit in a product or a software update for * such product, must reproduce the above copyright notice, this list of * conditions and the following disclaimer in the documentation and/or other * materials provided with the distribution. * * 3. Neither the name of Nordic Semiconductor ASA nor the names of its * contributors may be used to endorse or promote products derived from this * software without specific prior written permission. * * 4. This software, with or without modification, must only be used with a * Nordic Semiconductor ASA integrated circuit. * * 5. Any software provided in binary form under this license must not be reverse * engineered, decompiled, modified and/or disassembled. * * THIS SOFTWARE IS PROVIDED BY NORDIC SEMICONDUCTOR ASA "AS IS" AND ANY EXPRESS * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES * OF MERCHANTABILITY, NONINFRINGEMENT, AND FITNESS FOR A PARTICULAR PURPOSE ARE * DISCLAIMED. IN NO EVENT SHALL NORDIC SEMICONDUCTOR ASA OR CONTRIBUTORS BE * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. * */ #ifndef NRFX_PPI_H__ #define NRFX_PPI_H__ #include #include /** * @defgroup nrfx_ppi PPI allocator * @{ * @ingroup nrf_ppi * @brief Programmable Peripheral Interconnect (PPI) allocator. */ #ifdef __cplusplus extern "C" { #endif #ifndef NRFX_PPI_CHANNELS_USED #define NRFX_PPI_CHANNELS_USED 0 #endif #ifndef NRFX_PPI_GROUPS_USED #define NRFX_PPI_GROUPS_USED 0 #endif #if PPI_CH_NUM > 16 #define NRFX_PPI_ALL_APP_CHANNELS_MASK ((uint32_t)0xFFFFFFFFuL & ~(NRFX_PPI_CHANNELS_USED)) /**< All PPI channels available to the application. */ #define NRFX_PPI_PROG_APP_CHANNELS_MASK ((uint32_t)0x000FFFFFuL & ~(NRFX_PPI_CHANNELS_USED)) /**< Programmable PPI channels available to the application. */ #else #define NRFX_PPI_ALL_APP_CHANNELS_MASK ((uint32_t)0xFFF0FFFFuL & ~(NRFX_PPI_CHANNELS_USED)) /**< All PPI channels available to the application. */ #define NRFX_PPI_PROG_APP_CHANNELS_MASK ((uint32_t)0x0000FFFFuL & ~(NRFX_PPI_CHANNELS_USED)) /**< Programmable PPI channels available to the application. */ #endif #define NRFX_PPI_ALL_APP_GROUPS_MASK (((1uL << PPI_GROUP_NUM) - 1) & ~(NRFX_PPI_GROUPS_USED)) /**< All PPI groups available to the application. */ /** * @brief Function for uninitializing the PPI module. * * This function disables all channels and clears the channel groups. */ void nrfx_ppi_free_all(void); /** * @brief Function for allocating a PPI channel. * @details This function allocates the first unused PPI channel. * * @param[out] p_channel Pointer to the PPI channel that has been allocated. * * @retval NRFX_SUCCESS If the channel was successfully allocated. * @retval NRFX_ERROR_NO_MEM If there is no available channel to be used. */ nrfx_err_t nrfx_ppi_channel_alloc(nrf_ppi_channel_t * p_channel); /** * @brief Function for freeing a PPI channel. * @details This function also disables the chosen channel. * * @param[in] channel PPI channel to be freed. * * @retval NRFX_SUCCESS If the channel was successfully freed. * @retval NRFX_ERROR_INVALID_PARAM If the channel is not user-configurable. */ nrfx_err_t nrfx_ppi_channel_free(nrf_ppi_channel_t channel); /** * @brief Function for assigning task and event endpoints to the PPI channel. * * @param[in] channel PPI channel to be assigned endpoints. * @param[in] eep Event endpoint address. * @param[in] tep Task endpoint address. * * @retval NRFX_SUCCESS If the channel was successfully assigned. * @retval NRFX_ERROR_INVALID_STATE If the channel is not allocated for the user. * @retval NRFX_ERROR_INVALID_PARAM If the channel is not user-configurable. */ nrfx_err_t nrfx_ppi_channel_assign(nrf_ppi_channel_t channel, uint32_t eep, uint32_t tep); /** * @brief Function for assigning or clearing fork endpoint to the PPI channel. * * @param[in] channel PPI channel to be assigned endpoints. * @param[in] fork_tep Fork task endpoint address or 0 to clear. * * @retval NRFX_SUCCESS If the channel was successfully assigned. * @retval NRFX_ERROR_INVALID_STATE If the channel is not allocated for the user. * @retval NRFX_ERROR_NOT_SUPPORTED If function is not supported. */ nrfx_err_t nrfx_ppi_channel_fork_assign(nrf_ppi_channel_t channel, uint32_t fork_tep); /** * @brief Function for enabling a PPI channel. * * @param[in] channel PPI channel to be enabled. * * @retval NRFX_SUCCESS If the channel was successfully enabled. * @retval NRFX_ERROR_INVALID_STATE If the user-configurable channel is not allocated. * @retval NRFX_ERROR_INVALID_PARAM If the channel cannot be enabled by the user. */ nrfx_err_t nrfx_ppi_channel_enable(nrf_ppi_channel_t channel); /** * @brief Function for disabling a PPI channel. * * @param[in] channel PPI channel to be disabled. * * @retval NRFX_SUCCESS If the channel was successfully disabled. * @retval NRFX_ERROR_INVALID_STATE If the user-configurable channel is not allocated. * @retval NRFX_ERROR_INVALID_PARAM If the channel cannot be disabled by the user. */ nrfx_err_t nrfx_ppi_channel_disable(nrf_ppi_channel_t channel); /** * @brief Function for allocating a PPI channel group. * @details This function allocates the first unused PPI group. * * @param[out] p_group Pointer to the PPI channel group that has been allocated. * * @retval NRFX_SUCCESS If the channel group was successfully allocated. * @retval NRFX_ERROR_NO_MEM If there is no available channel group to be used. */ nrfx_err_t nrfx_ppi_group_alloc(nrf_ppi_channel_group_t * p_group); /** * @brief Function for freeing a PPI channel group. * @details This function also disables the chosen group. * * @param[in] group PPI channel group to be freed. * * @retval NRFX_SUCCESS If the channel group was successfully freed. * @retval NRFX_ERROR_INVALID_PARAM If the channel group is not user-configurable. */ nrfx_err_t nrfx_ppi_group_free(nrf_ppi_channel_group_t group); /** * @brief Compute a channel mask for NRF_PPI registers. * * @param[in] channel Channel number to transform to a mask. * * @retval Channel mask. */ __STATIC_INLINE uint32_t nrfx_ppi_channel_to_mask(nrf_ppi_channel_t channel) { return (1uL << (uint32_t) channel); } /** * @brief Function for including multiple PPI channels in a channel group. * * @param[in] channel_mask PPI channels to be added. * @param[in] group Channel group in which to include the channels. * * @retval NRFX_SUCCESS If the channels was successfully included. * @retval NRFX_ERROR_INVALID_PARAM If group is not an application group or channels are not an * application channels. * @retval NRFX_ERROR_INVALID_STATE If group is not an allocated group. */ nrfx_err_t nrfx_ppi_channels_include_in_group(uint32_t channel_mask, nrf_ppi_channel_group_t group); /** * @brief Function for including a PPI channel in a channel group. * * @param[in] channel PPI channel to be added. * @param[in] group Channel group in which to include the channel. * * @retval NRFX_SUCCESS If the channel was successfully included. * @retval NRFX_ERROR_INVALID_PARAM If group is not an application group or channel is not an * application channel. * @retval NRFX_ERROR_INVALID_STATE If group is not an allocated group. */ __STATIC_INLINE nrfx_err_t nrfx_ppi_channel_include_in_group(nrf_ppi_channel_t channel, nrf_ppi_channel_group_t group) { return nrfx_ppi_channels_include_in_group(nrfx_ppi_channel_to_mask(channel), group); } /** * @brief Function for removing multiple PPI channels from a channel group. * * @param[in] channel_mask PPI channels to be removed. * @param[in] group Channel group from which to remove the channels. * * @retval NRFX_SUCCESS If the channel was successfully removed. * @retval NRFX_ERROR_INVALID_PARAM If group is not an application group or channels are not an * application channels. * @retval NRFX_ERROR_INVALID_STATE If group is not an allocated group. */ nrfx_err_t nrfx_ppi_channels_remove_from_group(uint32_t channel_mask, nrf_ppi_channel_group_t group); /** * @brief Function for removing a PPI channel from a channel group. * * @param[in] channel PPI channel to be removed. * @param[in] group Channel group from which to remove the channel. * * @retval NRFX_SUCCESS If the channel was successfully removed. * @retval NRFX_ERROR_INVALID_PARAM If group is not an application group or channel is not an * application channel. * @retval NRFX_ERROR_INVALID_STATE If group is not an allocated group. */ __STATIC_INLINE nrfx_err_t nrfx_ppi_channel_remove_from_group(nrf_ppi_channel_t channel, nrf_ppi_channel_group_t group) { return nrfx_ppi_channels_remove_from_group(nrfx_ppi_channel_to_mask(channel), group); } /** * @brief Function for clearing a PPI channel group. * * @param[in] group Channel group to be cleared. * * @retval NRFX_SUCCESS If the group was successfully cleared. * @retval NRFX_ERROR_INVALID_PARAM If group is not an application group. * @retval NRFX_ERROR_INVALID_STATE If group is not an allocated group. */ __STATIC_INLINE nrfx_err_t nrfx_ppi_group_clear(nrf_ppi_channel_group_t group) { return nrfx_ppi_channels_remove_from_group(NRFX_PPI_ALL_APP_CHANNELS_MASK, group); } /** * @brief Function for enabling a PPI channel group. * * @param[in] group Channel group to be enabled. * * @retval NRFX_SUCCESS If the group was successfully enabled. * @retval NRFX_ERROR_INVALID_PARAM If group is not an application group. * @retval NRFX_ERROR_INVALID_STATE If group is not an allocated group. */ nrfx_err_t nrfx_ppi_group_enable(nrf_ppi_channel_group_t group); /** * @brief Function for disabling a PPI channel group. * * @param[in] group Channel group to be disabled. * * @retval NRFX_SUCCESS If the group was successfully disabled. * @retval NRFX_ERROR_INVALID_PARAM If group is not an application group. * @retval NRFX_ERROR_INVALID_STATE If group is not an allocated group. */ nrfx_err_t nrfx_ppi_group_disable(nrf_ppi_channel_group_t group); /** * @brief Function for getting the address of a PPI task. * * @param[in] task Task. * * @retval Task address. */ __STATIC_INLINE uint32_t nrfx_ppi_task_addr_get(nrf_ppi_task_t task) { return (uint32_t) nrf_ppi_task_address_get(task); } /** * @brief Function for getting the address of a PPI group enable task. * * @param[in] group PPI channel group * * @retval Task address. */ __STATIC_INLINE uint32_t nrfx_ppi_task_addr_group_enable_get(nrf_ppi_channel_group_t group) { return (uint32_t) nrf_ppi_task_group_enable_address_get(group); } /** * @brief Function for getting the address of a PPI group enable task. * * @param[in] group PPI channel group * * @retval Task address. */ __STATIC_INLINE uint32_t nrfx_ppi_task_addr_group_disable_get(nrf_ppi_channel_group_t group) { return (uint32_t) nrf_ppi_task_group_disable_address_get(group); } /** @} */ #ifdef __cplusplus } #endif #endif // NRFX_PPI_H__