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Diffstat (limited to 'drivers_nrf/hal/nrf_spis.h')
| -rw-r--r-- | drivers_nrf/hal/nrf_spis.h | 553 |
1 files changed, 553 insertions, 0 deletions
diff --git a/drivers_nrf/hal/nrf_spis.h b/drivers_nrf/hal/nrf_spis.h new file mode 100644 index 0000000..68746ad --- /dev/null +++ b/drivers_nrf/hal/nrf_spis.h @@ -0,0 +1,553 @@ +/** + * Copyright (c) 2015 - 2017, 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. + * + */ +/** + * @defgroup nrf_spis_hal SPIS HAL + * @{ + * @ingroup nrf_spis + * + * @brief Hardware access layer for accessing the SPIS peripheral. + */ + +#ifndef NRF_SPIS_H__ +#define NRF_SPIS_H__ + +#include <stddef.h> +#include <stdbool.h> +#include <stdint.h> + +#include "nrf.h" +#include "nrf_peripherals.h" + +#ifdef __cplusplus +extern "C" { +#endif + + +/** + * @brief This value can be used as a parameter for the @ref nrf_spis_pins_set + * function to specify that a given SPI signal (SCK, MOSI, or MISO) + * shall not be connected to a physical pin. + */ +#define NRF_SPIS_PIN_NOT_CONNECTED 0xFFFFFFFF + + +/** + * @brief SPIS tasks. + */ +typedef enum +{ + /*lint -save -e30*/ + NRF_SPIS_TASK_ACQUIRE = offsetof(NRF_SPIS_Type, TASKS_ACQUIRE), ///< Acquire SPI semaphore. + NRF_SPIS_TASK_RELEASE = offsetof(NRF_SPIS_Type, TASKS_RELEASE), ///< Release SPI semaphore, enabling the SPI slave to acquire it. + /*lint -restore*/ +} nrf_spis_task_t; + +/** + * @brief SPIS events. + */ +typedef enum +{ + /*lint -save -e30*/ + NRF_SPIS_EVENT_END = offsetof(NRF_SPIS_Type, EVENTS_END), ///< Granted transaction completed. + NRF_SPIS_EVENT_ACQUIRED = offsetof(NRF_SPIS_Type, EVENTS_ACQUIRED) ///< Semaphore acquired. + /*lint -restore*/ +} nrf_spis_event_t; + +/** + * @brief SPIS shortcuts. + */ +typedef enum +{ + NRF_SPIS_SHORT_END_ACQUIRE = SPIS_SHORTS_END_ACQUIRE_Msk ///< Shortcut between END event and ACQUIRE task. +} nrf_spis_short_mask_t; + +/** + * @brief SPIS interrupts. + */ +typedef enum +{ + NRF_SPIS_INT_END_MASK = SPIS_INTENSET_END_Msk, ///< Interrupt on END event. + NRF_SPIS_INT_ACQUIRED_MASK = SPIS_INTENSET_ACQUIRED_Msk ///< Interrupt on ACQUIRED event. +} nrf_spis_int_mask_t; + +/** + * @brief SPI modes. + */ +typedef enum +{ + NRF_SPIS_MODE_0, ///< SCK active high, sample on leading edge of clock. + NRF_SPIS_MODE_1, ///< SCK active high, sample on trailing edge of clock. + NRF_SPIS_MODE_2, ///< SCK active low, sample on leading edge of clock. + NRF_SPIS_MODE_3 ///< SCK active low, sample on trailing edge of clock. +} nrf_spis_mode_t; + +/** + * @brief SPI bit orders. + */ +typedef enum +{ + NRF_SPIS_BIT_ORDER_MSB_FIRST = SPIS_CONFIG_ORDER_MsbFirst, ///< Most significant bit shifted out first. + NRF_SPIS_BIT_ORDER_LSB_FIRST = SPIS_CONFIG_ORDER_LsbFirst ///< Least significant bit shifted out first. +} nrf_spis_bit_order_t; + +/** + * @brief SPI semaphore status. + */ +typedef enum +{ + NRF_SPIS_SEMSTAT_FREE = 0, ///< Semaphore is free. + NRF_SPIS_SEMSTAT_CPU = 1, ///< Semaphore is assigned to the CPU. + NRF_SPIS_SEMSTAT_SPIS = 2, ///< Semaphore is assigned to the SPI slave. + NRF_SPIS_SEMSTAT_CPUPENDING = 3 ///< Semaphore is assigned to the SPI, but a handover to the CPU is pending. +} nrf_spis_semstat_t; + +/** + * @brief SPIS status. + */ +typedef enum +{ + NRF_SPIS_STATUS_OVERREAD = SPIS_STATUS_OVERREAD_Msk, ///< TX buffer over-read detected and prevented. + NRF_SPIS_STATUS_OVERFLOW = SPIS_STATUS_OVERFLOW_Msk ///< RX buffer overflow detected and prevented. +} nrf_spis_status_mask_t; + +/** + * @brief Function for activating a specific SPIS task. + * + * @param[in] p_reg Pointer to the peripheral registers structure. + * @param[in] spis_task Task to activate. + */ +__STATIC_INLINE void nrf_spis_task_trigger(NRF_SPIS_Type * p_reg, + nrf_spis_task_t spis_task); + +/** + * @brief Function for getting the address of a specific SPIS task register. + * + * @param[in] p_reg Pointer to the peripheral registers structure. + * @param[in] spis_task Requested task. + * + * @return Address of the specified task register. + */ +__STATIC_INLINE uint32_t nrf_spis_task_address_get(NRF_SPIS_Type const * p_reg, + nrf_spis_task_t spis_task); + +/** + * @brief Function for clearing a specific SPIS event. + * + * @param[in] p_reg Pointer to the peripheral registers structure. + * @param[in] spis_event Event to clear. + */ +__STATIC_INLINE void nrf_spis_event_clear(NRF_SPIS_Type * p_reg, + nrf_spis_event_t spis_event); + +/** + * @brief Function for checking the state of a specific SPIS event. + * + * @param[in] p_reg Pointer to the peripheral registers structure. + * @param[in] spis_event Event to check. + * + * @retval true If the event is set. + * @retval false If the event is not set. + */ +__STATIC_INLINE bool nrf_spis_event_check(NRF_SPIS_Type const * p_reg, + nrf_spis_event_t spis_event); + +/** + * @brief Function for getting the address of a specific SPIS event register. + * + * @param[in] p_reg Pointer to the peripheral registers structure. + * @param[in] spis_event Requested event. + * + * @return Address of the specified event register. + */ +__STATIC_INLINE uint32_t nrf_spis_event_address_get(NRF_SPIS_Type const * p_reg, + nrf_spis_event_t spis_event); + +/** + * @brief Function for enabling specified shortcuts. + * + * @param[in] p_reg Pointer to the peripheral registers structure. + * @param[in] spis_shorts_mask Shortcuts to enable. + */ +__STATIC_INLINE void nrf_spis_shorts_enable(NRF_SPIS_Type * p_reg, + uint32_t spis_shorts_mask); + +/** + * @brief Function for disabling specified shortcuts. + * + * @param[in] p_reg Pointer to the peripheral registers structure. + * @param[in] spis_shorts_mask Shortcuts to disable. + */ +__STATIC_INLINE void nrf_spis_shorts_disable(NRF_SPIS_Type * p_reg, + uint32_t spis_shorts_mask); + +/** + * @brief Function for enabling specified interrupts. + * + * @param[in] p_reg Pointer to the peripheral registers structure. + * @param[in] spis_int_mask Interrupts to enable. + */ +__STATIC_INLINE void nrf_spis_int_enable(NRF_SPIS_Type * p_reg, + uint32_t spis_int_mask); + +/** + * @brief Function for disabling specified interrupts. + * + * @param[in] p_reg Pointer to the peripheral registers structure. + * @param[in] spis_int_mask Interrupts to disable. + */ +__STATIC_INLINE void nrf_spis_int_disable(NRF_SPIS_Type * p_reg, + uint32_t spis_int_mask); + +/** + * @brief Function for retrieving the state of a given interrupt. + * + * @param[in] p_reg Pointer to the peripheral registers structure. + * @param[in] spis_int Interrupt to check. + * + * @retval true If the interrupt is enabled. + * @retval false If the interrupt is not enabled. + */ +__STATIC_INLINE bool nrf_spis_int_enable_check(NRF_SPIS_Type const * p_reg, + nrf_spis_int_mask_t spis_int); + +/** + * @brief Function for enabling the SPIS peripheral. + * + * @param[in] p_reg Pointer to the peripheral registers structure. + */ +__STATIC_INLINE void nrf_spis_enable(NRF_SPIS_Type * p_reg); + +/** + * @brief Function for disabling the SPIS peripheral. + * + * @param[in] p_reg Pointer to the peripheral registers structure. + */ +__STATIC_INLINE void nrf_spis_disable(NRF_SPIS_Type * p_reg); + +/** + * @brief Function for retrieving the SPIS semaphore status. + * + * @param[in] p_reg Pointer to the peripheral registers structure. + * + * @returns Current semaphore status. + */ +__STATIC_INLINE nrf_spis_semstat_t nrf_spis_semaphore_status_get(NRF_SPIS_Type * p_reg); + +/** + * @brief Function for retrieving the SPIS status. + * + * @param[in] p_reg Pointer to the peripheral registers structure. + * + * @returns Current SPIS status. + */ +__STATIC_INLINE nrf_spis_status_mask_t nrf_spis_status_get(NRF_SPIS_Type * p_reg); + +/** + * @brief Function for configuring SPIS pins. + * + * If a given signal is not needed, pass the @ref NRF_SPIS_PIN_NOT_CONNECTED + * value instead of its pin number. + * + * @param[in] p_reg Pointer to the peripheral registers structure. + * @param[in] sck_pin SCK pin number. + * @param[in] mosi_pin MOSI pin number. + * @param[in] miso_pin MISO pin number. + * @param[in] csn_pin CSN pin number. + */ +__STATIC_INLINE void nrf_spis_pins_set(NRF_SPIS_Type * p_reg, + uint32_t sck_pin, + uint32_t mosi_pin, + uint32_t miso_pin, + uint32_t csn_pin); + +/** + * @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 that contains the data to send. + * @param[in] length Maximum number of data bytes to transmit. + */ +__STATIC_INLINE void nrf_spis_tx_buffer_set(NRF_SPIS_Type * p_reg, + uint8_t const * p_buffer, + uint8_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_spis_rx_buffer_set(NRF_SPIS_Type * p_reg, + uint8_t * p_buffer, + uint8_t length); + +/** + * @brief Function for getting the number of bytes transmitted + * in the last granted transaction. + * + * @param[in] p_reg Pointer to the peripheral registers structure. + * + * @returns Number of bytes transmitted. + */ +__STATIC_INLINE uint8_t nrf_spis_tx_amount_get(NRF_SPIS_Type const * p_reg); + +/** + * @brief Function for getting the number of bytes received + * in the last granted transaction. + * + * @param[in] p_reg Pointer to the peripheral registers structure. + * + * @returns Number of bytes received. + */ +__STATIC_INLINE uint8_t nrf_spis_rx_amount_get(NRF_SPIS_Type const * p_reg); + +/** + * @brief Function for setting the SPI configuration. + * + * @param[in] p_reg Pointer to the peripheral registers structure. + * @param[in] spi_mode SPI mode. + * @param[in] spi_bit_order SPI bit order. + */ +__STATIC_INLINE void nrf_spis_configure(NRF_SPIS_Type * p_reg, + nrf_spis_mode_t spi_mode, + nrf_spis_bit_order_t spi_bit_order); + +/** + * @brief Function for setting the default character. + * + * @param[in] p_reg Pointer to the peripheral registers structure. + * @param[in] def Default character that is clocked out in case of + * an overflow of the RXD buffer. + */ +__STATIC_INLINE void nrf_spis_def_set(NRF_SPIS_Type * p_reg, + uint8_t def); + +/** + * @brief Function for setting the over-read character. + * + * @param[in] p_reg Pointer to the peripheral registers structure. + * @param[in] orc Over-read character that is clocked out in case of + * an over-read of the TXD buffer. + */ +__STATIC_INLINE void nrf_spis_orc_set(NRF_SPIS_Type * p_reg, + uint8_t orc); + + +#ifndef SUPPRESS_INLINE_IMPLEMENTATION + +__STATIC_INLINE void nrf_spis_task_trigger(NRF_SPIS_Type * p_reg, + nrf_spis_task_t spis_task) +{ + *((volatile uint32_t *)((uint8_t *)p_reg + (uint32_t)spis_task)) = 0x1UL; +} + +__STATIC_INLINE uint32_t nrf_spis_task_address_get(NRF_SPIS_Type const * p_reg, + nrf_spis_task_t spis_task) +{ + return (uint32_t)p_reg + (uint32_t)spis_task; +} + +__STATIC_INLINE void nrf_spis_event_clear(NRF_SPIS_Type * p_reg, + nrf_spis_event_t spis_event) +{ + *((volatile uint32_t *)((uint8_t *)p_reg + (uint32_t)spis_event)) = 0x0UL; +#if __CORTEX_M == 0x04 + volatile uint32_t dummy = *((volatile uint32_t *)((uint8_t *)p_reg + (uint32_t)spis_event)); + (void)dummy; +#endif +} + +__STATIC_INLINE bool nrf_spis_event_check(NRF_SPIS_Type const * p_reg, + nrf_spis_event_t spis_event) +{ + return (bool)*(volatile uint32_t *)((uint8_t *)p_reg + (uint32_t)spis_event); +} + +__STATIC_INLINE uint32_t nrf_spis_event_address_get(NRF_SPIS_Type const * p_reg, + nrf_spis_event_t spis_event) +{ + return (uint32_t)p_reg + (uint32_t)spis_event; +} + +__STATIC_INLINE void nrf_spis_shorts_enable(NRF_SPIS_Type * p_reg, + uint32_t spis_shorts_mask) +{ + p_reg->SHORTS |= spis_shorts_mask; +} + +__STATIC_INLINE void nrf_spis_shorts_disable(NRF_SPIS_Type * p_reg, + uint32_t spis_shorts_mask) +{ + p_reg->SHORTS &= ~(spis_shorts_mask); +} + +__STATIC_INLINE void nrf_spis_int_enable(NRF_SPIS_Type * p_reg, + uint32_t spis_int_mask) +{ + p_reg->INTENSET = spis_int_mask; +} + +__STATIC_INLINE void nrf_spis_int_disable(NRF_SPIS_Type * p_reg, + uint32_t spis_int_mask) +{ + p_reg->INTENCLR = spis_int_mask; +} + +__STATIC_INLINE bool nrf_spis_int_enable_check(NRF_SPIS_Type const * p_reg, + nrf_spis_int_mask_t spis_int) +{ + return (bool)(p_reg->INTENSET & spis_int); +} + +__STATIC_INLINE void nrf_spis_enable(NRF_SPIS_Type * p_reg) +{ + p_reg->ENABLE = (SPIS_ENABLE_ENABLE_Enabled << SPIS_ENABLE_ENABLE_Pos); +} + +__STATIC_INLINE void nrf_spis_disable(NRF_SPIS_Type * p_reg) +{ + p_reg->ENABLE = (SPIS_ENABLE_ENABLE_Disabled << SPIS_ENABLE_ENABLE_Pos); +} + +__STATIC_INLINE nrf_spis_semstat_t nrf_spis_semaphore_status_get(NRF_SPIS_Type * p_reg) +{ + return (nrf_spis_semstat_t) ((p_reg->SEMSTAT & SPIS_SEMSTAT_SEMSTAT_Msk) + >> SPIS_SEMSTAT_SEMSTAT_Pos); +} + +__STATIC_INLINE nrf_spis_status_mask_t nrf_spis_status_get(NRF_SPIS_Type * p_reg) +{ + return (nrf_spis_status_mask_t) p_reg->STATUS; +} + +__STATIC_INLINE void nrf_spis_pins_set(NRF_SPIS_Type * p_reg, + uint32_t sck_pin, + uint32_t mosi_pin, + uint32_t miso_pin, + uint32_t csn_pin) +{ + p_reg->PSELSCK = sck_pin; + p_reg->PSELMOSI = mosi_pin; + p_reg->PSELMISO = miso_pin; + p_reg->PSELCSN = csn_pin; +} + +__STATIC_INLINE void nrf_spis_tx_buffer_set(NRF_SPIS_Type * p_reg, + uint8_t const * p_buffer, + uint8_t length) +{ + p_reg->TXDPTR = (uint32_t)p_buffer; + p_reg->MAXTX = length; +} + +__STATIC_INLINE void nrf_spis_rx_buffer_set(NRF_SPIS_Type * p_reg, + uint8_t * p_buffer, + uint8_t length) +{ + p_reg->RXDPTR = (uint32_t)p_buffer; + p_reg->MAXRX = length; +} + +__STATIC_INLINE uint8_t nrf_spis_tx_amount_get(NRF_SPIS_Type const * p_reg) +{ + return (uint8_t) p_reg->AMOUNTTX; +} + +__STATIC_INLINE uint8_t nrf_spis_rx_amount_get(NRF_SPIS_Type const * p_reg) +{ + return (uint8_t) p_reg->AMOUNTRX; +} + +__STATIC_INLINE void nrf_spis_configure(NRF_SPIS_Type * p_reg, + nrf_spis_mode_t spi_mode, + nrf_spis_bit_order_t spi_bit_order) +{ + uint32_t config = (spi_bit_order == NRF_SPIS_BIT_ORDER_MSB_FIRST ? + SPIS_CONFIG_ORDER_MsbFirst : SPIS_CONFIG_ORDER_LsbFirst); + + switch (spi_mode) + { + default: + case NRF_SPIS_MODE_0: + config |= (SPIS_CONFIG_CPOL_ActiveHigh << SPIS_CONFIG_CPOL_Pos) | + (SPIS_CONFIG_CPHA_Leading << SPIS_CONFIG_CPHA_Pos); + break; + + case NRF_SPIS_MODE_1: + config |= (SPIS_CONFIG_CPOL_ActiveHigh << SPIS_CONFIG_CPOL_Pos) | + (SPIS_CONFIG_CPHA_Trailing << SPIS_CONFIG_CPHA_Pos); + break; + + case NRF_SPIS_MODE_2: + config |= (SPIS_CONFIG_CPOL_ActiveLow << SPIS_CONFIG_CPOL_Pos) | + (SPIS_CONFIG_CPHA_Leading << SPIS_CONFIG_CPHA_Pos); + break; + + case NRF_SPIS_MODE_3: + config |= (SPIS_CONFIG_CPOL_ActiveLow << SPIS_CONFIG_CPOL_Pos) | + (SPIS_CONFIG_CPHA_Trailing << SPIS_CONFIG_CPHA_Pos); + break; + } + p_reg->CONFIG = config; +} + +__STATIC_INLINE void nrf_spis_orc_set(NRF_SPIS_Type * p_reg, + uint8_t orc) +{ + p_reg->ORC = orc; +} + +__STATIC_INLINE void nrf_spis_def_set(NRF_SPIS_Type * p_reg, + uint8_t def) +{ + p_reg->DEF = def; +} + +#endif // SUPPRESS_INLINE_IMPLEMENTATION + + +#ifdef __cplusplus +} +#endif + +#endif // NRF_SPIS_H__ + +/** @} */ |