/** * Copyright (c) 2015 - 2018, 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 NRF_TWIM_H__ #define NRF_TWIM_H__ #include #ifdef __cplusplus extern "C" { #endif /** * @defgroup nrf_twim_hal TWIM HAL * @{ * @ingroup nrf_twim * @brief Hardware access layer for managing the TWIM peripheral. */ /** * @brief TWIM tasks. */ typedef enum { /*lint -save -e30*/ NRF_TWIM_TASK_STARTRX = offsetof(NRF_TWIM_Type, TASKS_STARTRX), ///< Start TWI receive sequence. NRF_TWIM_TASK_STARTTX = offsetof(NRF_TWIM_Type, TASKS_STARTTX), ///< Start TWI transmit sequence. NRF_TWIM_TASK_STOP = offsetof(NRF_TWIM_Type, TASKS_STOP), ///< Stop TWI transaction. NRF_TWIM_TASK_SUSPEND = offsetof(NRF_TWIM_Type, TASKS_SUSPEND), ///< Suspend TWI transaction. NRF_TWIM_TASK_RESUME = offsetof(NRF_TWIM_Type, TASKS_RESUME) ///< Resume TWI transaction. /*lint -restore*/ } nrf_twim_task_t; /** * @brief TWIM events. */ typedef enum { /*lint -save -e30*/ NRF_TWIM_EVENT_STOPPED = offsetof(NRF_TWIM_Type, EVENTS_STOPPED), ///< TWI stopped. NRF_TWIM_EVENT_ERROR = offsetof(NRF_TWIM_Type, EVENTS_ERROR), ///< TWI error. NRF_TWIM_EVENT_SUSPENDED = 0x148, ///< TWI suspended. NRF_TWIM_EVENT_RXSTARTED = offsetof(NRF_TWIM_Type, EVENTS_RXSTARTED), ///< Receive sequence started. NRF_TWIM_EVENT_TXSTARTED = offsetof(NRF_TWIM_Type, EVENTS_TXSTARTED), ///< Transmit sequence started. NRF_TWIM_EVENT_LASTRX = offsetof(NRF_TWIM_Type, EVENTS_LASTRX), ///< Byte boundary, starting to receive the last byte. NRF_TWIM_EVENT_LASTTX = offsetof(NRF_TWIM_Type, EVENTS_LASTTX) ///< Byte boundary, starting to transmit the last byte. /*lint -restore*/ } nrf_twim_event_t; /** * @brief TWIM shortcuts. */ typedef enum { NRF_TWIM_SHORT_LASTTX_STARTRX_MASK = TWIM_SHORTS_LASTTX_STARTRX_Msk, ///< Shortcut between LASTTX event and STARTRX task. NRF_TWIM_SHORT_LASTTX_SUSPEND_MASK = TWIM_SHORTS_LASTTX_SUSPEND_Msk, ///< Shortcut between LASTTX event and SUSPEND task. NRF_TWIM_SHORT_LASTTX_STOP_MASK = TWIM_SHORTS_LASTTX_STOP_Msk, ///< Shortcut between LASTTX event and STOP task. NRF_TWIM_SHORT_LASTRX_STARTTX_MASK = TWIM_SHORTS_LASTRX_STARTTX_Msk, ///< Shortcut between LASTRX event and STARTTX task. NRF_TWIM_SHORT_LASTRX_STOP_MASK = TWIM_SHORTS_LASTRX_STOP_Msk, ///< Shortcut between LASTRX event and STOP task. NRF_TWIM_ALL_SHORTS_MASK = TWIM_SHORTS_LASTTX_STARTRX_Msk | TWIM_SHORTS_LASTTX_SUSPEND_Msk | TWIM_SHORTS_LASTTX_STOP_Msk | TWIM_SHORTS_LASTRX_STARTTX_Msk | TWIM_SHORTS_LASTRX_STOP_Msk ///< All TWIM shortcuts. } nrf_twim_short_mask_t; /** * @brief TWIM interrupts. */ typedef enum { NRF_TWIM_INT_STOPPED_MASK = TWIM_INTENSET_STOPPED_Msk, ///< Interrupt on STOPPED event. NRF_TWIM_INT_ERROR_MASK = TWIM_INTENSET_ERROR_Msk, ///< Interrupt on ERROR event. NRF_TWIM_INT_SUSPENDED_MASK = TWIM_INTENSET_SUSPENDED_Msk, ///< Interrupt on SUSPENDED event. NRF_TWIM_INT_RXSTARTED_MASK = TWIM_INTENSET_RXSTARTED_Msk, ///< Interrupt on RXSTARTED event. NRF_TWIM_INT_TXSTARTED_MASK = TWIM_INTENSET_TXSTARTED_Msk, ///< Interrupt on TXSTARTED event. NRF_TWIM_INT_LASTRX_MASK = TWIM_INTENSET_LASTRX_Msk, ///< Interrupt on LASTRX event. NRF_TWIM_INT_LASTTX_MASK = TWIM_INTENSET_LASTTX_Msk, ///< Interrupt on LASTTX event. NRF_TWIM_ALL_INTS_MASK = TWIM_INTENSET_STOPPED_Msk | TWIM_INTENSET_ERROR_Msk | TWIM_INTENSET_SUSPENDED_Msk | TWIM_INTENSET_RXSTARTED_Msk | TWIM_INTENSET_TXSTARTED_Msk | TWIM_INTENSET_LASTRX_Msk | TWIM_INTENSET_LASTTX_Msk ///< Interrupt on LASTTX event. } nrf_twim_int_mask_t; /** * @brief TWIM master clock frequency. */ typedef enum { NRF_TWIM_FREQ_100K = TWIM_FREQUENCY_FREQUENCY_K100, ///< 100 kbps. NRF_TWIM_FREQ_250K = TWIM_FREQUENCY_FREQUENCY_K250, ///< 250 kbps. NRF_TWIM_FREQ_400K = TWIM_FREQUENCY_FREQUENCY_K400 ///< 400 kbps. } nrf_twim_frequency_t; /** * @brief TWIM error source. */ typedef enum { NRF_TWIM_ERROR_ADDRESS_NACK = TWIM_ERRORSRC_ANACK_Msk, ///< NACK received after sending the address. NRF_TWIM_ERROR_DATA_NACK = TWIM_ERRORSRC_DNACK_Msk ///< NACK received after sending a data byte. } nrf_twim_error_t; /** * @brief Function for activating a specific TWIM task. * * @param[in] p_reg Pointer to the peripheral registers structure. * @param[in] task Task to activate. */ __STATIC_INLINE void nrf_twim_task_trigger(NRF_TWIM_Type * p_reg, nrf_twim_task_t task); /** * @brief Function for getting the address of a specific TWIM task register. * * @param[in] p_reg Pointer to the peripheral registers structure. * @param[in] task Requested task. * * @return Address of the specified task register. */ __STATIC_INLINE uint32_t * nrf_twim_task_address_get(NRF_TWIM_Type * p_reg, nrf_twim_task_t task); /** * @brief Function for clearing a specific TWIM event. * * @param[in] p_reg Pointer to the peripheral registers structure. * @param[in] event Event to clear. */ __STATIC_INLINE void nrf_twim_event_clear(NRF_TWIM_Type * p_reg, nrf_twim_event_t event); /** * @brief Function for checking the state of a specific TWIM event. * * @param[in] p_reg Pointer to the peripheral registers structure. * @param[in] event Event to check. * * @retval true If the event is set. * @retval false If the event is not set. */ __STATIC_INLINE bool nrf_twim_event_check(NRF_TWIM_Type * p_reg, nrf_twim_event_t event); /** * @brief Function for getting the address of a specific TWIM event register. * * @param[in] p_reg Pointer to the peripheral registers structure. * @param[in] event Requested event. * * @return Address of the specified event register. */ __STATIC_INLINE uint32_t * nrf_twim_event_address_get(NRF_TWIM_Type * p_reg, nrf_twim_event_t event); /** * @brief Function for enabling specified shortcuts. * * @param[in] p_reg Pointer to the peripheral registers structure. * @param[in] shorts_mask Shortcuts to enable. */ __STATIC_INLINE void nrf_twim_shorts_enable(NRF_TWIM_Type * p_reg, uint32_t shorts_mask); /** * @brief Function for disabling specified shortcuts. * * @param[in] p_reg Pointer to the peripheral registers structure. * @param[in] shorts_mask Shortcuts to disable. */ __STATIC_INLINE void nrf_twim_shorts_disable(NRF_TWIM_Type * p_reg, uint32_t shorts_mask); /** * @brief Function for enabling specified interrupts. * * @param[in] p_reg Pointer to the peripheral registers structure. * @param[in] int_mask Interrupts to enable. */ __STATIC_INLINE void nrf_twim_int_enable(NRF_TWIM_Type * p_reg, uint32_t int_mask); /** * @brief Function for disabling specified interrupts. * * @param[in] p_reg Pointer to the peripheral registers structure. * @param[in] int_mask Interrupts to disable. */ __STATIC_INLINE void nrf_twim_int_disable(NRF_TWIM_Type * p_reg, uint32_t int_mask); /** * @brief Function for checking the state of a given interrupt. * * @param[in] p_reg Pointer to the peripheral registers structure. * @param[in] int_mask Interrupt to check. * * @retval true If the interrupt is enabled. * @retval false If the interrupt is not enabled. */ __STATIC_INLINE bool nrf_twim_int_enable_check(NRF_TWIM_Type * p_reg, nrf_twim_int_mask_t int_mask); /** * @brief Function for enabling the TWIM peripheral. * * @param[in] p_reg Pointer to the peripheral registers structure. */ __STATIC_INLINE void nrf_twim_enable(NRF_TWIM_Type * p_reg); /** * @brief Function for disabling the TWIM peripheral. * * @param[in] p_reg Pointer to the peripheral registers structure. */ __STATIC_INLINE void nrf_twim_disable(NRF_TWIM_Type * p_reg); /** * @brief Function for configuring TWI pins. * * * @param[in] p_reg Pointer to the peripheral registers structure. * @param[in] scl_pin SCL pin number. * @param[in] sda_pin SDA pin number. */ __STATIC_INLINE void nrf_twim_pins_set(NRF_TWIM_Type * p_reg, uint32_t scl_pin, uint32_t sda_pin); /** * @brief Function for setting the TWI master clock frequency. * * @param[in] p_reg Pointer to the peripheral registers structure. * @param[in] frequency TWI frequency. */ __STATIC_INLINE void nrf_twim_frequency_set(NRF_TWIM_Type * p_reg, nrf_twim_frequency_t frequency); /** * @brief Function for checking the TWI error source. * * The error flags are cleared after reading. * * @param[in] p_reg Pointer to the peripheral registers structure. * * @return Mask with error source flags. */ __STATIC_INLINE uint32_t nrf_twim_errorsrc_get_and_clear(NRF_TWIM_Type * p_reg); /** * @brief Function for setting the address to be used in TWI transfers. * * @param[in] p_reg Pointer to the peripheral registers structure. * @param[in] address Address to be used in transfers. */ __STATIC_INLINE void nrf_twim_address_set(NRF_TWIM_Type * p_reg, uint8_t address); /** * @brief Function for setting the transmit buffer. * * @param[in] p_reg Pointer to the peripheral registers structure. * @param[in] p_buffer Pointer to the buffer with data to send. * @param[in] length Maximum number of data bytes to transmit. */ __STATIC_INLINE void nrf_twim_tx_buffer_set(NRF_TWIM_Type * p_reg, uint8_t const * p_buffer, size_t length); /** * @brief Function for setting the receive buffer. * * @param[in] p_reg Pointer to the peripheral registers structure. * @param[in] p_buffer Pointer to the buffer for received data. * @param[in] length Maximum number of data bytes to receive. */ __STATIC_INLINE void nrf_twim_rx_buffer_set(NRF_TWIM_Type * p_reg, uint8_t * p_buffer, size_t length); __STATIC_INLINE void nrf_twim_shorts_set(NRF_TWIM_Type * p_reg, uint32_t shorts_mask); __STATIC_INLINE size_t nrf_twim_txd_amount_get(NRF_TWIM_Type * p_reg); __STATIC_INLINE size_t nrf_twim_rxd_amount_get(NRF_TWIM_Type * p_reg); /** * @brief Function for enabling the TX list feature. * * @param[in] p_reg Pointer to the peripheral registers structure. */ __STATIC_INLINE void nrf_twim_tx_list_enable(NRF_TWIM_Type * p_reg); /** * @brief Function for disabling the TX list feature. * * @param[in] p_reg Pointer to the peripheral registers structure. */ __STATIC_INLINE void nrf_twim_tx_list_disable(NRF_TWIM_Type * p_reg); /** * @brief Function for enabling the RX list feature. * * @param[in] p_reg Pointer to the peripheral registers structure. */ __STATIC_INLINE void nrf_twim_rx_list_enable(NRF_TWIM_Type * p_reg); /** * @brief Function for disabling the RX list feature. * * @param[in] p_reg Pointer to the peripheral registers structure. */ __STATIC_INLINE void nrf_twim_rx_list_disable(NRF_TWIM_Type * p_reg); #ifndef SUPPRESS_INLINE_IMPLEMENTATION __STATIC_INLINE void nrf_twim_task_trigger(NRF_TWIM_Type * p_reg, nrf_twim_task_t task) { *((volatile uint32_t *)((uint8_t *)p_reg + (uint32_t)task)) = 0x1UL; } __STATIC_INLINE uint32_t * nrf_twim_task_address_get(NRF_TWIM_Type * p_reg, nrf_twim_task_t task) { return (uint32_t *)((uint8_t *)p_reg + (uint32_t)task); } __STATIC_INLINE void nrf_twim_event_clear(NRF_TWIM_Type * p_reg, nrf_twim_event_t event) { *((volatile uint32_t *)((uint8_t *)p_reg + (uint32_t)event)) = 0x0UL; #if __CORTEX_M == 0x04 volatile uint32_t dummy = *((volatile uint32_t *)((uint8_t *)p_reg + (uint32_t)event)); (void)dummy; #endif } __STATIC_INLINE bool nrf_twim_event_check(NRF_TWIM_Type * p_reg, nrf_twim_event_t event) { return (bool)*(volatile uint32_t *)((uint8_t *)p_reg + (uint32_t)event); } __STATIC_INLINE uint32_t * nrf_twim_event_address_get(NRF_TWIM_Type * p_reg, nrf_twim_event_t event) { return (uint32_t *)((uint8_t *)p_reg + (uint32_t)event); } __STATIC_INLINE void nrf_twim_shorts_enable(NRF_TWIM_Type * p_reg, uint32_t shorts_mask) { p_reg->SHORTS |= shorts_mask; } __STATIC_INLINE void nrf_twim_shorts_disable(NRF_TWIM_Type * p_reg, uint32_t shorts_mask) { p_reg->SHORTS &= ~(shorts_mask); } __STATIC_INLINE void nrf_twim_int_enable(NRF_TWIM_Type * p_reg, uint32_t int_mask) { p_reg->INTENSET = int_mask; } __STATIC_INLINE void nrf_twim_int_disable(NRF_TWIM_Type * p_reg, uint32_t int_mask) { p_reg->INTENCLR = int_mask; } __STATIC_INLINE bool nrf_twim_int_enable_check(NRF_TWIM_Type * p_reg, nrf_twim_int_mask_t int_mask) { return (bool)(p_reg->INTENSET & int_mask); } __STATIC_INLINE void nrf_twim_enable(NRF_TWIM_Type * p_reg) { p_reg->ENABLE = (TWIM_ENABLE_ENABLE_Enabled << TWIM_ENABLE_ENABLE_Pos); } __STATIC_INLINE void nrf_twim_disable(NRF_TWIM_Type * p_reg) { p_reg->ENABLE = (TWIM_ENABLE_ENABLE_Disabled << TWIM_ENABLE_ENABLE_Pos); } __STATIC_INLINE void nrf_twim_pins_set(NRF_TWIM_Type * p_reg, uint32_t scl_pin, uint32_t sda_pin) { p_reg->PSEL.SCL = scl_pin; p_reg->PSEL.SDA = sda_pin; } __STATIC_INLINE void nrf_twim_frequency_set(NRF_TWIM_Type * p_reg, nrf_twim_frequency_t frequency) { p_reg->FREQUENCY = frequency; } __STATIC_INLINE uint32_t nrf_twim_errorsrc_get_and_clear(NRF_TWIM_Type * p_reg) { uint32_t error_source = p_reg->ERRORSRC; // [error flags are cleared by writing '1' on their position] p_reg->ERRORSRC = error_source; return error_source; } __STATIC_INLINE void nrf_twim_address_set(NRF_TWIM_Type * p_reg, uint8_t address) { p_reg->ADDRESS = address; } __STATIC_INLINE void nrf_twim_tx_buffer_set(NRF_TWIM_Type * p_reg, uint8_t const * p_buffer, size_t length) { p_reg->TXD.PTR = (uint32_t)p_buffer; p_reg->TXD.MAXCNT = length; } __STATIC_INLINE void nrf_twim_rx_buffer_set(NRF_TWIM_Type * p_reg, uint8_t * p_buffer, size_t length) { p_reg->RXD.PTR = (uint32_t)p_buffer; p_reg->RXD.MAXCNT = length; } __STATIC_INLINE void nrf_twim_shorts_set(NRF_TWIM_Type * p_reg, uint32_t shorts_mask) { p_reg->SHORTS = shorts_mask; } __STATIC_INLINE size_t nrf_twim_txd_amount_get(NRF_TWIM_Type * p_reg) { return p_reg->TXD.AMOUNT; } __STATIC_INLINE size_t nrf_twim_rxd_amount_get(NRF_TWIM_Type * p_reg) { return p_reg->RXD.AMOUNT; } __STATIC_INLINE void nrf_twim_tx_list_enable(NRF_TWIM_Type * p_reg) { p_reg->TXD.LIST = 1; } __STATIC_INLINE void nrf_twim_tx_list_disable(NRF_TWIM_Type * p_reg) { p_reg->TXD.LIST = 0; } __STATIC_INLINE void nrf_twim_rx_list_enable(NRF_TWIM_Type * p_reg) { p_reg->RXD.LIST = 1; } __STATIC_INLINE void nrf_twim_rx_list_disable(NRF_TWIM_Type * p_reg) { p_reg->RXD.LIST = 0; } #endif // SUPPRESS_INLINE_IMPLEMENTATION /** @} */ #ifdef __cplusplus } #endif #endif // NRF_TWIM_H__