Genadi Zawidowski / mbed-dev

mbed library sources. Supersedes mbed-src. Edited target satm32f446 for user USART3 pins

Dependents:   IGLOO_board

Fork of mbed-dev by mbed official

targets/TARGET_Maxim/TARGET_MAX32620C/mxc/spim.h@188:3f10722804f9, 2018-07-30 (annotated)

Committer:
ua1arn
Date:
Mon Jul 30 12:31:10 2018 +0000
Revision:
188:3f10722804f9
Parent:
186:707f6e361f3e 
before add multi-configuration USB descriptors

Who changed what in which revision?

UserRevisionLine numberNew contents of line
Anna Bridge 186:707f6e361f3e 1 /**
Anna Bridge 186:707f6e361f3e 2 * @file
Anna Bridge 186:707f6e361f3e 3 * @brief Registers, Bit Masks and Bit Positions for the SPI Master module.
Anna Bridge 186:707f6e361f3e 4 */
Anna Bridge 186:707f6e361f3e 5 /* ****************************************************************************
Anna Bridge 186:707f6e361f3e 6 * Copyright (C) 2016 Maxim Integrated Products, Inc., All Rights Reserved.
Anna Bridge 186:707f6e361f3e 7 *
Anna Bridge 186:707f6e361f3e 8 * Permission is hereby granted, free of charge, to any person obtaining a
Anna Bridge 186:707f6e361f3e 9 * copy of this software and associated documentation files (the "Software"),
Anna Bridge 186:707f6e361f3e 10 * to deal in the Software without restriction, including without limitation
Anna Bridge 186:707f6e361f3e 11 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
Anna Bridge 186:707f6e361f3e 12 * and/or sell copies of the Software, and to permit persons to whom the
Anna Bridge 186:707f6e361f3e 13 * Software is furnished to do so, subject to the following conditions:
Anna Bridge 186:707f6e361f3e 14 *
Anna Bridge 186:707f6e361f3e 15 * The above copyright notice and this permission notice shall be included
Anna Bridge 186:707f6e361f3e 16 * in all copies or substantial portions of the Software.
Anna Bridge 186:707f6e361f3e 17 *
Anna Bridge 186:707f6e361f3e 18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
Anna Bridge 186:707f6e361f3e 19 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
Anna Bridge 186:707f6e361f3e 20 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
Anna Bridge 186:707f6e361f3e 21 * IN NO EVENT SHALL MAXIM INTEGRATED BE LIABLE FOR ANY CLAIM, DAMAGES
Anna Bridge 186:707f6e361f3e 22 * OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
Anna Bridge 186:707f6e361f3e 23 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
Anna Bridge 186:707f6e361f3e 24 * OTHER DEALINGS IN THE SOFTWARE.
Anna Bridge 186:707f6e361f3e 25 *
Anna Bridge 186:707f6e361f3e 26 * Except as contained in this notice, the name of Maxim Integrated
Anna Bridge 186:707f6e361f3e 27 * Products, Inc. shall not be used except as stated in the Maxim Integrated
Anna Bridge 186:707f6e361f3e 28 * Products, Inc. Branding Policy.
Anna Bridge 186:707f6e361f3e 29 *
Anna Bridge 186:707f6e361f3e 30 * The mere transfer of this software does not imply any licenses
Anna Bridge 186:707f6e361f3e 31 * of trade secrets, proprietary technology, copyrights, patents,
Anna Bridge 186:707f6e361f3e 32 * trademarks, maskwork rights, or any other form of intellectual
Anna Bridge 186:707f6e361f3e 33 * property whatsoever. Maxim Integrated Products, Inc. retains all
Anna Bridge 186:707f6e361f3e 34 * ownership rights.
Anna Bridge 186:707f6e361f3e 35 *
Anna Bridge 186:707f6e361f3e 36 * $Date: 2017-02-16 12:03:47 -0600 (Thu, 16 Feb 2017) $
Anna Bridge 186:707f6e361f3e 37 * $Revision: 26464 $
Anna Bridge 186:707f6e361f3e 38 *
Anna Bridge 186:707f6e361f3e 39 **************************************************************************** */
Anna Bridge 186:707f6e361f3e 40
Anna Bridge 186:707f6e361f3e 41 /* **** Includes **** */
Anna Bridge 186:707f6e361f3e 42 #include "mxc_config.h"
Anna Bridge 186:707f6e361f3e 43 #include "mxc_sys.h"
Anna Bridge 186:707f6e361f3e 44 #include "spim_regs.h"
Anna Bridge 186:707f6e361f3e 45
Anna Bridge 186:707f6e361f3e 46 /* Define to prevent redundant inclusion */
Anna Bridge 186:707f6e361f3e 47 #ifndef _SPIM_H_
Anna Bridge 186:707f6e361f3e 48 #define _SPIM_H_
Anna Bridge 186:707f6e361f3e 49
Anna Bridge 186:707f6e361f3e 50 #ifdef __cplusplus
Anna Bridge 186:707f6e361f3e 51 extern "C" {
Anna Bridge 186:707f6e361f3e 52 #endif
Anna Bridge 186:707f6e361f3e 53
Anna Bridge 186:707f6e361f3e 54 /**
Anna Bridge 186:707f6e361f3e 55 * @ingroup periphlibs
Anna Bridge 186:707f6e361f3e 56 * @defgroup spim SPI Master
Anna Bridge 186:707f6e361f3e 57 * @brief Serial Peripheral Interface Master (SPIM) API.
Anna Bridge 186:707f6e361f3e 58 * @{
Anna Bridge 186:707f6e361f3e 59 */
Anna Bridge 186:707f6e361f3e 60
Anna Bridge 186:707f6e361f3e 61 /* **** Definitions **** */
Anna Bridge 186:707f6e361f3e 62
Anna Bridge 186:707f6e361f3e 63 /**
Anna Bridge 186:707f6e361f3e 64 * Enumeration type for selecting the active levels for the SPI Master Slave Select (SS) lines.
Anna Bridge 186:707f6e361f3e 65 */
Anna Bridge 186:707f6e361f3e 66 typedef enum {
Anna Bridge 186:707f6e361f3e 67 SPIM_SSEL0_HIGH = (0x1 << 0), /**< Slave Select 0 High. */
Anna Bridge 186:707f6e361f3e 68 SPIM_SSEL0_LOW = 0, /**< Slave Select 0 Low. */
Anna Bridge 186:707f6e361f3e 69 SPIM_SSEL1_HIGH = (0x1 << 1), /**< Slave Select 1 High. */
Anna Bridge 186:707f6e361f3e 70 SPIM_SSEL1_LOW = 0, /**< Slave Select 1 Low. */
Anna Bridge 186:707f6e361f3e 71 SPIM_SSEL2_HIGH = (0x1 << 2), /**< Slave Select 2 High. */
Anna Bridge 186:707f6e361f3e 72 SPIM_SSEL2_LOW = 0, /**< Slave Select 2 Low. */
Anna Bridge 186:707f6e361f3e 73 SPIM_SSEL3_HIGH = (0x1 << 3), /**< Slave Select 3 High. */
Anna Bridge 186:707f6e361f3e 74 SPIM_SSEL3_LOW = 0, /**< Slave Select 3 Low. */
Anna Bridge 186:707f6e361f3e 75 SPIM_SSEL4_HIGH = (0x1 << 4), /**< Slave Select 4 High. */
Anna Bridge 186:707f6e361f3e 76 SPIM_SSEL4_LOW = 0 /**< Slave Select 4 Low. */
Anna Bridge 186:707f6e361f3e 77 }
Anna Bridge 186:707f6e361f3e 78 spim_ssel_t;
Anna Bridge 186:707f6e361f3e 79
Anna Bridge 186:707f6e361f3e 80 /**
Anna Bridge 186:707f6e361f3e 81 * Enumeration type for setting the number data lines to use for communication.
Anna Bridge 186:707f6e361f3e 82 */
Anna Bridge 186:707f6e361f3e 83 typedef enum {
Anna Bridge 186:707f6e361f3e 84 SPIM_WIDTH_1 = 0, /**< 1 Data Line. */
Anna Bridge 186:707f6e361f3e 85 SPIM_WIDTH_2 = 1, /**< 2 Data Lines (x2). */
Anna Bridge 186:707f6e361f3e 86 SPIM_WIDTH_4 = 2 /**< 4 Data Lines (x4). */
Anna Bridge 186:707f6e361f3e 87 } spim_width_t;
Anna Bridge 186:707f6e361f3e 88
Anna Bridge 186:707f6e361f3e 89 /**
Anna Bridge 186:707f6e361f3e 90 * Structure type for configuring a SPIM port.
Anna Bridge 186:707f6e361f3e 91 */
Anna Bridge 186:707f6e361f3e 92 typedef struct {
Anna Bridge 186:707f6e361f3e 93 uint8_t mode; /**< SPIM mode selection, 0 to 3. */
Anna Bridge 186:707f6e361f3e 94 uint32_t ssel_pol; /**< Mask of active levels for the slave select signals, see #spim_ssel_t. */
Anna Bridge 186:707f6e361f3e 95 uint32_t baud; /**< Baud rate in Hz. */
Anna Bridge 186:707f6e361f3e 96 } spim_cfg_t;
Anna Bridge 186:707f6e361f3e 97
Anna Bridge 186:707f6e361f3e 98 /**
Anna Bridge 186:707f6e361f3e 99 * Structure type representing a SPI Master Transaction request.
Anna Bridge 186:707f6e361f3e 100 */
Anna Bridge 186:707f6e361f3e 101 typedef struct spim_req spim_req_t;
Anna Bridge 186:707f6e361f3e 102
Anna Bridge 186:707f6e361f3e 103 /**
Anna Bridge 186:707f6e361f3e 104 * @brief Callback function type used in asynchromous SPIM communications requests.
Anna Bridge 186:707f6e361f3e 105 * @details The function declaration for the SPIM callback is:
Anna Bridge 186:707f6e361f3e 106 * @code
Anna Bridge 186:707f6e361f3e 107 * void callback(spim_req_t * req, int error_code);
Anna Bridge 186:707f6e361f3e 108 * @endcode
Anna Bridge 186:707f6e361f3e 109 * | | |
Anna Bridge 186:707f6e361f3e 110 * | -----: | :----------------------------------------- |
Anna Bridge 186:707f6e361f3e 111 * | \p req | Pointer to a #spim_req object representing the active SPIM active transaction. |
Anna Bridge 186:707f6e361f3e 112 * | \p error_code | An error code if the active transaction had a failure or #E_NO_ERROR if successful. |
Anna Bridge 186:707f6e361f3e 113 * @addtogroup spim_async
Anna Bridge 186:707f6e361f3e 114 */
Anna Bridge 186:707f6e361f3e 115 typedef void (*spim_callback_fn)(spim_req_t * req, int error_code);
Anna Bridge 186:707f6e361f3e 116
Anna Bridge 186:707f6e361f3e 117 /**
Anna Bridge 186:707f6e361f3e 118 * @brief Structure definition for an SPI Master Transaction request.
Anna Bridge 186:707f6e361f3e 119 * @note When using this structure for an asynchronous operation, the
Anna Bridge 186:707f6e361f3e 120 * structure must remain allocated until the callback is completed.
Anna Bridge 186:707f6e361f3e 121 * @addtogroup spim_async
Anna Bridge 186:707f6e361f3e 122 */
Anna Bridge 186:707f6e361f3e 123 struct spim_req {
Anna Bridge 186:707f6e361f3e 124 uint8_t ssel; /**< Number of the Slave Select to use. */
Anna Bridge 186:707f6e361f3e 125 uint8_t deass; /**< Set to de-assert slave select at the completions of the transaction.*/
Anna Bridge 186:707f6e361f3e 126 const uint8_t *tx_data; /**< Pointer to a buffer to transmit data from. */
Anna Bridge 186:707f6e361f3e 127 uint8_t *rx_data; /**< Pointer to a buffer to store data received. */
Anna Bridge 186:707f6e361f3e 128 spim_width_t width; /**< Number of data lines to use, see #spim_width_t. */
Anna Bridge 186:707f6e361f3e 129 unsigned len; /**< Number of bytes to send from the \p tx_data buffer. */
Anna Bridge 186:707f6e361f3e 130 unsigned read_num; /**< Number of bytes read and stored in \p rx_data buffer. */
Anna Bridge 186:707f6e361f3e 131 unsigned write_num; /**< Number of bytes sent from the \p tx_data buffer, this will be filled by the driver after up to \p len bytes have been transmitted. */
Anna Bridge 186:707f6e361f3e 132 spim_callback_fn callback; /**< Function pointer to a callback function if desired, NULL otherwise */
Anna Bridge 186:707f6e361f3e 133 };
Anna Bridge 186:707f6e361f3e 134
Anna Bridge 186:707f6e361f3e 135 /* **** Globals **** */
Anna Bridge 186:707f6e361f3e 136
Anna Bridge 186:707f6e361f3e 137 /* **** Function Prototypes **** */
Anna Bridge 186:707f6e361f3e 138
Anna Bridge 186:707f6e361f3e 139 /**
Anna Bridge 186:707f6e361f3e 140 * @brief Initialize the SPIM peripheral module.
Anna Bridge 186:707f6e361f3e 141 *
Anna Bridge 186:707f6e361f3e 142 * @param spim Pointer to the SPIM register structure.
Anna Bridge 186:707f6e361f3e 143 * @param cfg Pointer to an SPIM configuration object.
Anna Bridge 186:707f6e361f3e 144 * @param sys_cfg Pointer to a system configuration object to select the
Anna Bridge 186:707f6e361f3e 145 * peripheral clock rate and assign the requested GPIO.
Anna Bridge 186:707f6e361f3e 146 *
Anna Bridge 186:707f6e361f3e 147 * @return #E_NO_ERROR if the SPIM port is initialized successfully, @ref MXC_Error_Codes
Anna Bridge 186:707f6e361f3e 148 * "error" if unsuccessful.
Anna Bridge 186:707f6e361f3e 149 */
Anna Bridge 186:707f6e361f3e 150 int SPIM_Init(mxc_spim_regs_t *spim, const spim_cfg_t *cfg, const sys_cfg_spim_t *sys_cfg);
Anna Bridge 186:707f6e361f3e 151
Anna Bridge 186:707f6e361f3e 152 /**
Anna Bridge 186:707f6e361f3e 153 * @brief Shutdown the SPIM peripheral module instance represented by the
Anna Bridge 186:707f6e361f3e 154 * @p spim parameter.
Anna Bridge 186:707f6e361f3e 155 *
Anna Bridge 186:707f6e361f3e 156 * @param spim Pointer to the SPIM register structure.
Anna Bridge 186:707f6e361f3e 157 *
Anna Bridge 186:707f6e361f3e 158 * @return #E_NO_ERROR if the SPIM is shutdown successfully, @ref
Anna Bridge 186:707f6e361f3e 159 * MXC_Error_Codes "error" if unsuccessful.
Anna Bridge 186:707f6e361f3e 160 */
Anna Bridge 186:707f6e361f3e 161 int SPIM_Shutdown(mxc_spim_regs_t *spim);
Anna Bridge 186:707f6e361f3e 162
Anna Bridge 186:707f6e361f3e 163 /**
Anna Bridge 186:707f6e361f3e 164 * @brief Send Clock cycles on SCK without reading or writing.
Anna Bridge 186:707f6e361f3e 165 *
Anna Bridge 186:707f6e361f3e 166 * @param spim Pointer to the SPIM register structure.
Anna Bridge 186:707f6e361f3e 167 * @param len Number of clock cycles to send.
Anna Bridge 186:707f6e361f3e 168 * @param ssel Slave select number.
Anna Bridge 186:707f6e361f3e 169 * @param deass De-assert slave select at the end of the transaction.
Anna Bridge 186:707f6e361f3e 170 *
Anna Bridge 186:707f6e361f3e 171 * @return Cycles transacted if everything is successful, @ref
Anna Bridge 186:707f6e361f3e 172 * MXC_Error_Codes "error" if unsuccessful.
Anna Bridge 186:707f6e361f3e 173 */
Anna Bridge 186:707f6e361f3e 174 int SPIM_Clocks(mxc_spim_regs_t *spim, uint32_t len, uint8_t ssel, uint8_t deass);
Anna Bridge 186:707f6e361f3e 175
Anna Bridge 186:707f6e361f3e 176 /**
Anna Bridge 186:707f6e361f3e 177 * @brief Read/write SPIM data. This function will block until the
Anna Bridge 186:707f6e361f3e 178 * transaction is complete.
Anna Bridge 186:707f6e361f3e 179 *
Anna Bridge 186:707f6e361f3e 180 * @param spim Pointer to the SPIM register structure.
Anna Bridge 186:707f6e361f3e 181 * @param req Request for a SPIM transaction.
Anna Bridge 186:707f6e361f3e 182 * @note If a callback function is registered it will not be called when using a blocking function.
Anna Bridge 186:707f6e361f3e 183 *
Anna Bridge 186:707f6e361f3e 184 * @return Bytes transacted if everything is successful, error if
Anna Bridge 186:707f6e361f3e 185 * unsuccessful.
Anna Bridge 186:707f6e361f3e 186 */
Anna Bridge 186:707f6e361f3e 187 int SPIM_Trans(mxc_spim_regs_t *spim, spim_req_t *req);
Anna Bridge 186:707f6e361f3e 188 /**
Anna Bridge 186:707f6e361f3e 189 * @defgroup spim_async SPIM Asynchrous Functions
Anna Bridge 186:707f6e361f3e 190 * @{
Anna Bridge 186:707f6e361f3e 191 */
Anna Bridge 186:707f6e361f3e 192 /**
Anna Bridge 186:707f6e361f3e 193 * @brief Asynchronously read/write SPIM data.
Anna Bridge 186:707f6e361f3e 194 *
Anna Bridge 186:707f6e361f3e 195 * @param spim Pointer to the SPIM register structure.
Anna Bridge 186:707f6e361f3e 196 * @param req Request for a SPIM transaction.
Anna Bridge 186:707f6e361f3e 197 * @note Request struct must remain allocated until callback.
Anna Bridge 186:707f6e361f3e 198 *
Anna Bridge 186:707f6e361f3e 199 * @return #E_NO_ERROR if everything is successful, @ref MXC_Error_Codes
Anna Bridge 186:707f6e361f3e 200 * "error" if unsuccessful.
Anna Bridge 186:707f6e361f3e 201 */
Anna Bridge 186:707f6e361f3e 202 int SPIM_TransAsync(mxc_spim_regs_t *spim, spim_req_t *req);
Anna Bridge 186:707f6e361f3e 203
Anna Bridge 186:707f6e361f3e 204 /**
Anna Bridge 186:707f6e361f3e 205 * @brief Abort asynchronous request.
Anna Bridge 186:707f6e361f3e 206 *
Anna Bridge 186:707f6e361f3e 207 * @param req Pointer to a request structure for a SPIM transaction.
Anna Bridge 186:707f6e361f3e 208 *
Anna Bridge 186:707f6e361f3e 209 * @return #E_NO_ERROR if request aborted, , @ref MXC_Error_Codes "error" if
Anna Bridge 186:707f6e361f3e 210 * unsuccessful.
Anna Bridge 186:707f6e361f3e 211 */
Anna Bridge 186:707f6e361f3e 212 int SPIM_AbortAsync(spim_req_t *req);
Anna Bridge 186:707f6e361f3e 213
Anna Bridge 186:707f6e361f3e 214 /**
Anna Bridge 186:707f6e361f3e 215 * @brief SPIM interrupt handler.
Anna Bridge 186:707f6e361f3e 216 * @details This function should be called by the application from the
Anna Bridge 186:707f6e361f3e 217 * interrupt handler if SPIM interrupts are enabled. Alternately,
Anna Bridge 186:707f6e361f3e 218 * this function can be periodically polled by the application if
Anna Bridge 186:707f6e361f3e 219 * SPIM interrupts are disabled.
Anna Bridge 186:707f6e361f3e 220 *
Anna Bridge 186:707f6e361f3e 221 * @param spim Base address of the SPIM module.
Anna Bridge 186:707f6e361f3e 222 */
Anna Bridge 186:707f6e361f3e 223 void SPIM_Handler(mxc_spim_regs_t *spim);
Anna Bridge 186:707f6e361f3e 224
Anna Bridge 186:707f6e361f3e 225 /**
Anna Bridge 186:707f6e361f3e 226 * @brief Check the SPIM to see if it's busy.
Anna Bridge 186:707f6e361f3e 227 *
Anna Bridge 186:707f6e361f3e 228 * @param spim Pointer to the SPIM register structure.
Anna Bridge 186:707f6e361f3e 229 *
Anna Bridge 186:707f6e361f3e 230 * @retval #E_NO_ERROR if idle.
Anna Bridge 186:707f6e361f3e 231 * @retval #E_BUSY if in use.
Anna Bridge 186:707f6e361f3e 232 */
Anna Bridge 186:707f6e361f3e 233 int SPIM_Busy(mxc_spim_regs_t *spim);
Anna Bridge 186:707f6e361f3e 234 /**@} end of spim_async define group */
Anna Bridge 186:707f6e361f3e 235
Anna Bridge 186:707f6e361f3e 236 /**
Anna Bridge 186:707f6e361f3e 237 * @brief Attempts to prepare the SPIM for Low Power Sleep Modes.
Anna Bridge 186:707f6e361f3e 238 * @details Checks for any ongoing transactions. Disables interrupts if the
Anna Bridge 186:707f6e361f3e 239 * SPIM is idle.
Anna Bridge 186:707f6e361f3e 240 *
Anna Bridge 186:707f6e361f3e 241 * @param spim The spim
Anna Bridge 186:707f6e361f3e 242 *
Anna Bridge 186:707f6e361f3e 243 * @return #E_NO_ERROR if ready to sleep.
Anna Bridge 186:707f6e361f3e 244 * @return #E_BUSY if not able to sleep at this time.
Anna Bridge 186:707f6e361f3e 245 */
Anna Bridge 186:707f6e361f3e 246 int SPIM_PrepForSleep(mxc_spim_regs_t *spim);
Anna Bridge 186:707f6e361f3e 247
Anna Bridge 186:707f6e361f3e 248 /**
Anna Bridge 186:707f6e361f3e 249 * @brief Enables the SPIM without overwriting the existing configuration.
Anna Bridge 186:707f6e361f3e 250 *
Anna Bridge 186:707f6e361f3e 251 * @param spim Pointer to the SPIM register structure.
Anna Bridge 186:707f6e361f3e 252 */
Anna Bridge 186:707f6e361f3e 253 __STATIC_INLINE void SPIM_Enable(mxc_spim_regs_t *spim)
Anna Bridge 186:707f6e361f3e 254 {
Anna Bridge 186:707f6e361f3e 255 spim->gen_ctrl |= (MXC_F_SPIM_GEN_CTRL_SPI_MSTR_EN |
Anna Bridge 186:707f6e361f3e 256 MXC_F_SPIM_GEN_CTRL_TX_FIFO_EN | MXC_F_SPIM_GEN_CTRL_RX_FIFO_EN);
Anna Bridge 186:707f6e361f3e 257 }
Anna Bridge 186:707f6e361f3e 258
Anna Bridge 186:707f6e361f3e 259 /**
Anna Bridge 186:707f6e361f3e 260 * @brief Drains/empties the data in the RX FIFO.
Anna Bridge 186:707f6e361f3e 261 *
Anna Bridge 186:707f6e361f3e 262 * @param spim Pointer to the SPIM register structure.
Anna Bridge 186:707f6e361f3e 263 */
Anna Bridge 186:707f6e361f3e 264 __STATIC_INLINE void SPIM_DrainRX(mxc_spim_regs_t *spim)
Anna Bridge 186:707f6e361f3e 265 {
Anna Bridge 186:707f6e361f3e 266 uint32_t ctrl_save = spim->gen_ctrl;
Anna Bridge 186:707f6e361f3e 267 spim->gen_ctrl = (ctrl_save & ~MXC_F_SPIM_GEN_CTRL_RX_FIFO_EN);
Anna Bridge 186:707f6e361f3e 268 spim->gen_ctrl = ctrl_save;
Anna Bridge 186:707f6e361f3e 269 }
Anna Bridge 186:707f6e361f3e 270
Anna Bridge 186:707f6e361f3e 271 /**
Anna Bridge 186:707f6e361f3e 272 * @brief Drains/empties the data in the TX FIFO.
Anna Bridge 186:707f6e361f3e 273 *
Anna Bridge 186:707f6e361f3e 274 * @param spim Pointer to the SPIM register structure.
Anna Bridge 186:707f6e361f3e 275 */
Anna Bridge 186:707f6e361f3e 276 __STATIC_INLINE void SPIM_DrainTX(mxc_spim_regs_t *spim)
Anna Bridge 186:707f6e361f3e 277 {
Anna Bridge 186:707f6e361f3e 278 uint32_t ctrl_save = spim->gen_ctrl;
Anna Bridge 186:707f6e361f3e 279 spim->gen_ctrl = (ctrl_save & ~MXC_F_SPIM_GEN_CTRL_TX_FIFO_EN);
Anna Bridge 186:707f6e361f3e 280 spim->gen_ctrl = ctrl_save;
Anna Bridge 186:707f6e361f3e 281 }
Anna Bridge 186:707f6e361f3e 282
Anna Bridge 186:707f6e361f3e 283 /**
Anna Bridge 186:707f6e361f3e 284 * @brief Returns the number of bytes free in the TX FIFO.
Anna Bridge 186:707f6e361f3e 285 *
Anna Bridge 186:707f6e361f3e 286 * @param spim Pointer to the SPIM register structure.
Anna Bridge 186:707f6e361f3e 287 *
Anna Bridge 186:707f6e361f3e 288 * @return Number of bytes free in Transmit FIFO.
Anna Bridge 186:707f6e361f3e 289 */
Anna Bridge 186:707f6e361f3e 290 __STATIC_INLINE unsigned SPIM_NumWriteAvail(mxc_spim_regs_t *spim)
Anna Bridge 186:707f6e361f3e 291 {
Anna Bridge 186:707f6e361f3e 292 return (MXC_CFG_SPIM_FIFO_DEPTH - ((spim->fifo_ctrl &
Anna Bridge 186:707f6e361f3e 293 MXC_F_SPIM_FIFO_CTRL_TX_FIFO_USED) >> MXC_F_SPIM_FIFO_CTRL_TX_FIFO_USED_POS));
Anna Bridge 186:707f6e361f3e 294 }
Anna Bridge 186:707f6e361f3e 295
Anna Bridge 186:707f6e361f3e 296 /**
Anna Bridge 186:707f6e361f3e 297 * @brief Returns the number of bytes available to read in the RX FIFO.
Anna Bridge 186:707f6e361f3e 298 *
Anna Bridge 186:707f6e361f3e 299 * @param spim Pointer to the SPIM register structure.
Anna Bridge 186:707f6e361f3e 300 *
Anna Bridge 186:707f6e361f3e 301 * @return Number of bytes in RX FIFO.
Anna Bridge 186:707f6e361f3e 302 */
Anna Bridge 186:707f6e361f3e 303 __STATIC_INLINE unsigned SPIM_NumReadAvail(mxc_spim_regs_t *spim)
Anna Bridge 186:707f6e361f3e 304 {
Anna Bridge 186:707f6e361f3e 305 return ((spim->fifo_ctrl & MXC_F_SPIM_FIFO_CTRL_RX_FIFO_USED) >>
Anna Bridge 186:707f6e361f3e 306 MXC_F_SPIM_FIFO_CTRL_RX_FIFO_USED_POS);
Anna Bridge 186:707f6e361f3e 307 }
Anna Bridge 186:707f6e361f3e 308
Anna Bridge 186:707f6e361f3e 309 /**
Anna Bridge 186:707f6e361f3e 310 * @brief Clear the SPIM interrupt flags.
Anna Bridge 186:707f6e361f3e 311 *
Anna Bridge 186:707f6e361f3e 312 * @param spim Pointer to the SPIM register structure.
Anna Bridge 186:707f6e361f3e 313 * @param mask Mask of the SPIM interrupt flags to clear, see @ref
Anna Bridge 186:707f6e361f3e 314 * SPIM_INTFL_Register Register for the SPIM interrupt flag
Anna Bridge 186:707f6e361f3e 315 * bit masks.
Anna Bridge 186:707f6e361f3e 316 */
Anna Bridge 186:707f6e361f3e 317 __STATIC_INLINE void SPIM_ClearFlags(mxc_spim_regs_t *spim, uint32_t mask)
Anna Bridge 186:707f6e361f3e 318 {
Anna Bridge 186:707f6e361f3e 319 spim->intfl = mask;
Anna Bridge 186:707f6e361f3e 320 }
Anna Bridge 186:707f6e361f3e 321
Anna Bridge 186:707f6e361f3e 322 /**
Anna Bridge 186:707f6e361f3e 323 * @brief Read the current SPIM interrupt flags.
Anna Bridge 186:707f6e361f3e 324 *
Anna Bridge 186:707f6e361f3e 325 * @param spim Pointer to the SPIM register structure.
Anna Bridge 186:707f6e361f3e 326 *
Anna Bridge 186:707f6e361f3e 327 * @return Mask of currently set SPIM interrupt flags, see @ref
Anna Bridge 186:707f6e361f3e 328 * SPIM_INTFL_Register Register for the SPIM interrupt flag bit
Anna Bridge 186:707f6e361f3e 329 * masks.
Anna Bridge 186:707f6e361f3e 330 */
Anna Bridge 186:707f6e361f3e 331 __STATIC_INLINE unsigned SPIM_GetFlags(mxc_spim_regs_t *spim)
Anna Bridge 186:707f6e361f3e 332 {
Anna Bridge 186:707f6e361f3e 333 return (spim->intfl);
Anna Bridge 186:707f6e361f3e 334 }
Anna Bridge 186:707f6e361f3e 335
Anna Bridge 186:707f6e361f3e 336 /**@} end of group spim_comm */
Anna Bridge 186:707f6e361f3e 337 #ifdef __cplusplus
Anna Bridge 186:707f6e361f3e 338 }
Anna Bridge 186:707f6e361f3e 339 #endif
Anna Bridge 186:707f6e361f3e 340
Anna Bridge 186:707f6e361f3e 341 #endif /* _SPIM_H_ */