Diff: TARGET_SDT51822B/TOOLCHAIN_IAR/nrf_twi.h

Revision:

171:3a7713b1edbc

Parent:

169:a7c7b631e539

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/TARGET_SDT51822B/TOOLCHAIN_IAR/nrf_twi.h	Thu Nov 08 11:45:42 2018 +0000
@@ -0,0 +1,429 @@
+/* 
+ * Copyright (c) 2015 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 or object form under this license must not be reverse 
+ *      engineered, decompiled, modified and/or disassembled. 
+ * 
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER 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_TWI_H__
+#define NRF_TWI_H__
+ 
+/**
+ * @defgroup nrf_twi_hal TWI HAL
+ * @{
+ * @ingroup nrf_twi_master
+ *
+ * @brief Hardware access layer for managing the TWI peripheral.
+ */
+
+#include <stdint.h>
+#include <stddef.h>
+#include <stdbool.h>
+
+#include "nrf.h"
+
+/**
+ * @brief TWI tasks.
+ */
+typedef enum
+{
+    /*lint -save -e30*/
+    NRF_TWI_TASK_STARTRX = offsetof(NRF_TWI_Type, TASKS_STARTRX), ///< Start TWI receive sequence.
+    NRF_TWI_TASK_STARTTX = offsetof(NRF_TWI_Type, TASKS_STARTTX), ///< Start TWI transmit sequence.
+    NRF_TWI_TASK_STOP    = offsetof(NRF_TWI_Type, TASKS_STOP),    ///< Stop TWI transaction.
+    NRF_TWI_TASK_SUSPEND = offsetof(NRF_TWI_Type, TASKS_SUSPEND), ///< Suspend TWI transaction.
+    NRF_TWI_TASK_RESUME  = offsetof(NRF_TWI_Type, TASKS_RESUME)   ///< Resume TWI transaction.
+    /*lint -restore*/
+} nrf_twi_task_t;
+
+/**
+ * @brief TWI events.
+ */
+typedef enum
+{
+    /*lint -save -e30*/
+    NRF_TWI_EVENT_STOPPED   = offsetof(NRF_TWI_Type, EVENTS_STOPPED),  ///< TWI stopped.
+    NRF_TWI_EVENT_RXDREADY  = offsetof(NRF_TWI_Type, EVENTS_RXDREADY), ///< TWI RXD byte received.
+    NRF_TWI_EVENT_TXDSENT   = offsetof(NRF_TWI_Type, EVENTS_TXDSENT),  ///< TWI TXD byte sent.
+    NRF_TWI_EVENT_ERROR     = offsetof(NRF_TWI_Type, EVENTS_ERROR),    ///< TWI error.
+    NRF_TWI_EVENT_BB        = offsetof(NRF_TWI_Type, EVENTS_BB),       ///< TWI byte boundary, generated before each byte that is sent or received.
+    NRF_TWI_EVENT_SUSPENDED = offsetof(NRF_TWI_Type, EVENTS_SUSPENDED) ///< TWI entered the suspended state.
+    /*lint -restore*/
+} nrf_twi_event_t;
+
+/**
+ * @brief TWI shortcuts.
+ */
+typedef enum
+{
+    NRF_TWI_SHORT_BB_SUSPEND_MASK = TWI_SHORTS_BB_SUSPEND_Msk, ///< Shortcut between BB event and SUSPEND task.
+    NRF_TWI_SHORT_BB_STOP_MASK    = TWI_SHORTS_BB_STOP_Msk,    ///< Shortcut between BB event and STOP task.
+} nrf_twi_short_mask_t;
+
+/**
+ * @brief TWI interrupts.
+ */
+typedef enum
+{
+    NRF_TWI_INT_STOPPED_MASK    = TWI_INTENSET_STOPPED_Msk,  ///< Interrupt on STOPPED event.
+    NRF_TWI_INT_RXDREADY_MASK   = TWI_INTENSET_RXDREADY_Msk, ///< Interrupt on RXDREADY event.
+    NRF_TWI_INT_TXDSENT_MASK    = TWI_INTENSET_TXDSENT_Msk,  ///< Interrupt on TXDSENT event.
+    NRF_TWI_INT_ERROR_MASK      = TWI_INTENSET_ERROR_Msk,    ///< Interrupt on ERROR event.
+    NRF_TWI_INT_BB_MASK         = TWI_INTENSET_BB_Msk,       ///< Interrupt on BB event.
+    NRF_TWI_INT_SUSPENDED_MASK  = TWI_INTENSET_SUSPENDED_Msk ///< Interrupt on SUSPENDED event.
+} nrf_twi_int_mask_t;
+
+/**
+ * @brief TWI error source.
+ */
+typedef enum
+{
+    NRF_TWI_ERROR_ADDRESS_NACK = TWI_ERRORSRC_ANACK_Msk,  ///< NACK received after sending the address.
+    NRF_TWI_ERROR_DATA_NACK    = TWI_ERRORSRC_DNACK_Msk,  ///< NACK received after sending a data byte.
+    NRF_TWI_ERROR_OVERRUN      = TWI_ERRORSRC_OVERRUN_Msk ///< Overrun error.
+                                                          /**< A new byte was received before the previous byte was read
+                                                           *   from the RXD register (previous data is lost). */
+} nrf_twi_error_t;
+
+/**
+ * @brief TWI master clock frequency.
+ */
+typedef enum
+{
+    NRF_TWI_FREQ_100K = TWI_FREQUENCY_FREQUENCY_K100, ///< 100 kbps.
+    NRF_TWI_FREQ_250K = TWI_FREQUENCY_FREQUENCY_K250, ///< 250 kbps.
+    NRF_TWI_FREQ_400K = TWI_FREQUENCY_FREQUENCY_K400  ///< 400 kbps.
+} nrf_twi_frequency_t;
+
+
+/**
+ * @brief Function for activating a specific TWI task.
+ *
+ * @param[in] p_twi TWI instance.
+ * @param[in] task  Task to activate.
+ */
+__STATIC_INLINE void nrf_twi_task_trigger(NRF_TWI_Type * p_twi,
+                                          nrf_twi_task_t task);
+
+/**
+ * @brief Function for getting the address of a specific TWI task register.
+ *
+ * @param[in] p_twi TWI instance.
+ * @param[in] task  Requested task.
+ *
+ * @return Address of the specified task register.
+ */
+__STATIC_INLINE uint32_t * nrf_twi_task_address_get(NRF_TWI_Type * p_twi,
+                                                    nrf_twi_task_t task);
+
+/**
+ * @brief Function for clearing a specific TWI event.
+ *
+ * @param[in] p_twi TWI instance.
+ * @param[in] event Event to clear.
+ */
+__STATIC_INLINE void nrf_twi_event_clear(NRF_TWI_Type * p_twi,
+                                         nrf_twi_event_t event);
+
+/**
+ * @brief Function for checking the state of a specific event.
+ *
+ * @param[in] p_twi TWI instance.
+ * @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_twi_event_check(NRF_TWI_Type  * p_twi,
+                                         nrf_twi_event_t event);
+
+/**
+ * @brief Function for getting the address of a specific TWI event register.
+ *
+ * @param[in] p_twi TWI instance.
+ * @param[in] event Requested event.
+ *
+ * @return Address of the specified event register.
+ */
+__STATIC_INLINE uint32_t * nrf_twi_event_address_get(NRF_TWI_Type  * p_twi,
+                                                     nrf_twi_event_t event);
+
+/**
+ * @brief Function for enabling specified shortcuts.
+ *
+ * @param[in] p_twi       TWI instance.
+ * @param[in] shorts_mask Shortcuts to enable.
+ */
+__STATIC_INLINE void nrf_twi_shorts_enable(NRF_TWI_Type * p_twi,
+                                           uint32_t shorts_mask);
+
+/**
+ * @brief Function for disabling specified shortcuts.
+ *
+ * @param[in] p_twi       TWI instance.
+ * @param[in] shorts_mask Shortcuts to disable.
+ */
+__STATIC_INLINE void nrf_twi_shorts_disable(NRF_TWI_Type * p_twi,
+                                            uint32_t shorts_mask);
+
+/**
+ * @brief Function for enabling specified interrupts.
+ *
+ * @param[in] p_twi    TWI instance.
+ * @param[in] int_mask Interrupts to enable.
+ */
+__STATIC_INLINE void nrf_twi_int_enable(NRF_TWI_Type * p_twi,
+                                        uint32_t int_mask);
+
+/**
+ * @brief Function for disabling specified interrupts.
+ *
+ * @param[in] p_twi   TWI instance.
+ * @param[in] int_mask Interrupts to disable.
+ */
+__STATIC_INLINE void nrf_twi_int_disable(NRF_TWI_Type * p_twi,
+                                         uint32_t int_mask);
+
+/**
+ * @brief Function for retrieving the state of a given interrupt.
+ *
+ * @param[in] p_twi    TWI instance.
+ * @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_twi_int_enable_check(NRF_TWI_Type * p_twi,
+                                              nrf_twi_int_mask_t int_mask);
+
+/**
+ * @brief Function for enabling the TWI peripheral.
+ *
+ * @param[in] p_twi TWI instance.
+ */
+__STATIC_INLINE void nrf_twi_enable(NRF_TWI_Type * p_twi);
+
+/**
+ * @brief Function for disabling the TWI peripheral.
+ *
+ * @param[in] p_twi TWI instance.
+ */
+__STATIC_INLINE void nrf_twi_disable(NRF_TWI_Type * p_twi);
+
+/**
+ * @brief Function for configuring TWI pins.
+ *
+ *
+ * @param[in] p_twi   TWI instance.
+ * @param[in] scl_pin SCL pin number.
+ * @param[in] sda_pin SDA pin number.
+ */
+__STATIC_INLINE void nrf_twi_pins_set(NRF_TWI_Type * p_twi,
+                                      uint32_t scl_pin,
+                                      uint32_t sda_pin);
+
+/**
+ * @brief Function for setting the TWI master clock frequency.
+ *
+ * @param[in] p_twi     TWI instance.
+ * @param[in] frequency TWI frequency.
+ */
+__STATIC_INLINE void nrf_twi_frequency_set(NRF_TWI_Type * p_twi,
+                                           nrf_twi_frequency_t frequency);
+
+/**
+ * @brief Function for checking the TWI error source.
+ *
+ * The error flags are cleared after reading.
+ *
+ * @param[in] p_twi TWI instance.
+ *
+ * @return Mask with error source flags.
+ */
+__STATIC_INLINE uint32_t nrf_twi_errorsrc_get_and_clear(NRF_TWI_Type * p_twi);
+
+/**
+ * @brief Function for setting the address to be used in TWI transfers.
+ *
+ * @param[in] p_twi   TWI instance.
+ * @param[in] address Address to be used in transfers.
+ */
+__STATIC_INLINE void nrf_twi_address_set(NRF_TWI_Type * p_twi, uint8_t address);
+
+/**
+ * @brief Function for reading data received by TWI.
+ *
+ * @param[in] p_twi TWI instance.
+ *
+ * @return Received data.
+ */
+__STATIC_INLINE uint8_t nrf_twi_rxd_get(NRF_TWI_Type * p_twi);
+
+/**
+ * @brief Function for writing data to be transmitted by TWI.
+ *
+ * @param[in] p_twi TWI instance.
+ * @param[in] data  Data to be transmitted.
+ */
+__STATIC_INLINE void nrf_twi_txd_set(NRF_TWI_Type * p_twi, uint8_t data);
+
+__STATIC_INLINE void nrf_twi_shorts_set(NRF_TWI_Type * p_twi,
+                                        uint32_t shorts_mask);
+
+/**
+ * @}
+ */
+
+
+#ifndef SUPPRESS_INLINE_IMPLEMENTATION
+
+__STATIC_INLINE void nrf_twi_task_trigger(NRF_TWI_Type * p_twi,
+                                          nrf_twi_task_t task)
+{
+    *((volatile uint32_t *)((uint8_t *)p_twi + (uint32_t)task)) = 0x1UL;
+}
+
+__STATIC_INLINE uint32_t * nrf_twi_task_address_get(NRF_TWI_Type * p_twi,
+                                                    nrf_twi_task_t task)
+{
+    return (uint32_t *)((uint8_t *)p_twi + (uint32_t)task);
+}
+
+__STATIC_INLINE void nrf_twi_event_clear(NRF_TWI_Type  * p_twi,
+                                         nrf_twi_event_t event)
+{
+    *((volatile uint32_t *)((uint8_t *)p_twi + (uint32_t)event)) = 0x0UL;
+}
+
+__STATIC_INLINE bool nrf_twi_event_check(NRF_TWI_Type  * p_twi,
+                                         nrf_twi_event_t event)
+{
+    return (bool)*(volatile uint32_t *)((uint8_t *)p_twi + (uint32_t)event);
+}
+
+__STATIC_INLINE uint32_t * nrf_twi_event_address_get(NRF_TWI_Type  * p_twi,
+                                                     nrf_twi_event_t event)
+{
+    return (uint32_t *)((uint8_t *)p_twi + (uint32_t)event);
+}
+
+__STATIC_INLINE void nrf_twi_shorts_enable(NRF_TWI_Type * p_twi,
+                                           uint32_t shorts_mask)
+{
+    p_twi->SHORTS |= shorts_mask;
+}
+
+__STATIC_INLINE void nrf_twi_shorts_disable(NRF_TWI_Type * p_twi,
+                                            uint32_t shorts_mask)
+{
+    p_twi->SHORTS &= ~(shorts_mask);
+}
+
+__STATIC_INLINE void nrf_twi_int_enable(NRF_TWI_Type * p_twi,
+                                        uint32_t int_mask)
+{
+    p_twi->INTENSET = int_mask;
+}
+
+__STATIC_INLINE void nrf_twi_int_disable(NRF_TWI_Type * p_twi,
+                                         uint32_t int_mask)
+{
+    p_twi->INTENCLR = int_mask;
+}
+
+__STATIC_INLINE bool nrf_twi_int_enable_check(NRF_TWI_Type * p_twi,
+                                              nrf_twi_int_mask_t int_mask)
+{
+    return (bool)(p_twi->INTENSET & int_mask);
+}
+
+__STATIC_INLINE void nrf_twi_enable(NRF_TWI_Type * p_twi)
+{
+    p_twi->ENABLE = (TWI_ENABLE_ENABLE_Enabled << TWI_ENABLE_ENABLE_Pos);
+}
+
+__STATIC_INLINE void nrf_twi_disable(NRF_TWI_Type * p_twi)
+{
+    p_twi->ENABLE = (TWI_ENABLE_ENABLE_Disabled << TWI_ENABLE_ENABLE_Pos);
+}
+
+__STATIC_INLINE void nrf_twi_pins_set(NRF_TWI_Type * p_twi,
+                                      uint32_t scl_pin,
+                                      uint32_t sda_pin)
+{
+    p_twi->PSELSCL = scl_pin;
+    p_twi->PSELSDA = sda_pin;
+}
+
+__STATIC_INLINE void nrf_twi_frequency_set(NRF_TWI_Type * p_twi,
+                                           nrf_twi_frequency_t frequency)
+{
+    p_twi->FREQUENCY = frequency;
+}
+
+__STATIC_INLINE uint32_t nrf_twi_errorsrc_get_and_clear(NRF_TWI_Type * p_twi)
+{
+    uint32_t error_source = p_twi->ERRORSRC;
+
+    // [error flags are cleared by writing '1' on their position]
+    p_twi->ERRORSRC = error_source;
+
+    return error_source;
+}
+
+__STATIC_INLINE void nrf_twi_address_set(NRF_TWI_Type * p_twi, uint8_t address)
+{
+    p_twi->ADDRESS = address;
+}
+
+__STATIC_INLINE uint8_t nrf_twi_rxd_get(NRF_TWI_Type * p_twi)
+{
+    return (uint8_t)p_twi->RXD;
+}
+
+__STATIC_INLINE void nrf_twi_txd_set(NRF_TWI_Type * p_twi, uint8_t data)
+{
+    p_twi->TXD = data;
+}
+
+__STATIC_INLINE void nrf_twi_shorts_set(NRF_TWI_Type * p_twi,
+                                        uint32_t shorts_mask)
+{
+    p_twi->SHORTS = shorts_mask;
+}
+
+#endif // SUPPRESS_INLINE_IMPLEMENTATION
+
+#endif // NRF_TWI_H__