added prescaler for 16 bit pwm in LPC1347 target
Fork of mbed-dev by
targets/hal/TARGET_Freescale/TARGET_KSDK2_MCUS/TARGET_K66F/drivers/fsl_dspi.c@144:ef7eb2e8f9f7, 2016-09-02 (annotated)
- Committer:
- <>
- Date:
- Fri Sep 02 15:07:44 2016 +0100
- Revision:
- 144:ef7eb2e8f9f7
This updates the lib to the mbed lib v125
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
<> | 144:ef7eb2e8f9f7 | 1 | /* |
<> | 144:ef7eb2e8f9f7 | 2 | * Copyright (c) 2015, Freescale Semiconductor, Inc. |
<> | 144:ef7eb2e8f9f7 | 3 | * All rights reserved. |
<> | 144:ef7eb2e8f9f7 | 4 | * |
<> | 144:ef7eb2e8f9f7 | 5 | * Redistribution and use in source and binary forms, with or without modification, |
<> | 144:ef7eb2e8f9f7 | 6 | * are permitted provided that the following conditions are met: |
<> | 144:ef7eb2e8f9f7 | 7 | * |
<> | 144:ef7eb2e8f9f7 | 8 | * o Redistributions of source code must retain the above copyright notice, this list |
<> | 144:ef7eb2e8f9f7 | 9 | * of conditions and the following disclaimer. |
<> | 144:ef7eb2e8f9f7 | 10 | * |
<> | 144:ef7eb2e8f9f7 | 11 | * o Redistributions in binary form must reproduce the above copyright notice, this |
<> | 144:ef7eb2e8f9f7 | 12 | * list of conditions and the following disclaimer in the documentation and/or |
<> | 144:ef7eb2e8f9f7 | 13 | * other materials provided with the distribution. |
<> | 144:ef7eb2e8f9f7 | 14 | * |
<> | 144:ef7eb2e8f9f7 | 15 | * o Neither the name of Freescale Semiconductor, Inc. nor the names of its |
<> | 144:ef7eb2e8f9f7 | 16 | * contributors may be used to endorse or promote products derived from this |
<> | 144:ef7eb2e8f9f7 | 17 | * software without specific prior written permission. |
<> | 144:ef7eb2e8f9f7 | 18 | * |
<> | 144:ef7eb2e8f9f7 | 19 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND |
<> | 144:ef7eb2e8f9f7 | 20 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED |
<> | 144:ef7eb2e8f9f7 | 21 | * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
<> | 144:ef7eb2e8f9f7 | 22 | * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR |
<> | 144:ef7eb2e8f9f7 | 23 | * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES |
<> | 144:ef7eb2e8f9f7 | 24 | * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
<> | 144:ef7eb2e8f9f7 | 25 | * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON |
<> | 144:ef7eb2e8f9f7 | 26 | * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
<> | 144:ef7eb2e8f9f7 | 27 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS |
<> | 144:ef7eb2e8f9f7 | 28 | * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
<> | 144:ef7eb2e8f9f7 | 29 | */ |
<> | 144:ef7eb2e8f9f7 | 30 | |
<> | 144:ef7eb2e8f9f7 | 31 | #include "fsl_dspi.h" |
<> | 144:ef7eb2e8f9f7 | 32 | |
<> | 144:ef7eb2e8f9f7 | 33 | /******************************************************************************* |
<> | 144:ef7eb2e8f9f7 | 34 | * Definitions |
<> | 144:ef7eb2e8f9f7 | 35 | ******************************************************************************/ |
<> | 144:ef7eb2e8f9f7 | 36 | /*! @brief Typedef for master interrupt handler. */ |
<> | 144:ef7eb2e8f9f7 | 37 | typedef void (*dspi_master_isr_t)(SPI_Type *base, dspi_master_handle_t *handle); |
<> | 144:ef7eb2e8f9f7 | 38 | |
<> | 144:ef7eb2e8f9f7 | 39 | /*! @brief Typedef for slave interrupt handler. */ |
<> | 144:ef7eb2e8f9f7 | 40 | typedef void (*dspi_slave_isr_t)(SPI_Type *base, dspi_slave_handle_t *handle); |
<> | 144:ef7eb2e8f9f7 | 41 | |
<> | 144:ef7eb2e8f9f7 | 42 | /******************************************************************************* |
<> | 144:ef7eb2e8f9f7 | 43 | * Prototypes |
<> | 144:ef7eb2e8f9f7 | 44 | ******************************************************************************/ |
<> | 144:ef7eb2e8f9f7 | 45 | /*! |
<> | 144:ef7eb2e8f9f7 | 46 | * @brief Get instance number for DSPI module. |
<> | 144:ef7eb2e8f9f7 | 47 | * |
<> | 144:ef7eb2e8f9f7 | 48 | * @param base DSPI peripheral base address. |
<> | 144:ef7eb2e8f9f7 | 49 | */ |
<> | 144:ef7eb2e8f9f7 | 50 | uint32_t DSPI_GetInstance(SPI_Type *base); |
<> | 144:ef7eb2e8f9f7 | 51 | |
<> | 144:ef7eb2e8f9f7 | 52 | /*! |
<> | 144:ef7eb2e8f9f7 | 53 | * @brief Configures the DSPI peripheral chip select polarity. |
<> | 144:ef7eb2e8f9f7 | 54 | * |
<> | 144:ef7eb2e8f9f7 | 55 | * This function takes in the desired peripheral chip select (Pcs) and it's corresponding desired polarity and |
<> | 144:ef7eb2e8f9f7 | 56 | * configures the Pcs signal to operate with the desired characteristic. |
<> | 144:ef7eb2e8f9f7 | 57 | * |
<> | 144:ef7eb2e8f9f7 | 58 | * @param base DSPI peripheral address. |
<> | 144:ef7eb2e8f9f7 | 59 | * @param pcs The particular peripheral chip select (parameter value is of type dspi_which_pcs_t) for which we wish to |
<> | 144:ef7eb2e8f9f7 | 60 | * apply the active high or active low characteristic. |
<> | 144:ef7eb2e8f9f7 | 61 | * @param activeLowOrHigh The setting for either "active high, inactive low (0)" or "active low, inactive high(1)" of |
<> | 144:ef7eb2e8f9f7 | 62 | * type dspi_pcs_polarity_config_t. |
<> | 144:ef7eb2e8f9f7 | 63 | */ |
<> | 144:ef7eb2e8f9f7 | 64 | static void DSPI_SetOnePcsPolarity(SPI_Type *base, dspi_which_pcs_t pcs, dspi_pcs_polarity_config_t activeLowOrHigh); |
<> | 144:ef7eb2e8f9f7 | 65 | |
<> | 144:ef7eb2e8f9f7 | 66 | /*! |
<> | 144:ef7eb2e8f9f7 | 67 | * @brief Master fill up the TX FIFO with data. |
<> | 144:ef7eb2e8f9f7 | 68 | * This is not a public API as it is called from other driver functions. |
<> | 144:ef7eb2e8f9f7 | 69 | */ |
<> | 144:ef7eb2e8f9f7 | 70 | static void DSPI_MasterTransferFillUpTxFifo(SPI_Type *base, dspi_master_handle_t *handle); |
<> | 144:ef7eb2e8f9f7 | 71 | |
<> | 144:ef7eb2e8f9f7 | 72 | /*! |
<> | 144:ef7eb2e8f9f7 | 73 | * @brief Master finish up a transfer. |
<> | 144:ef7eb2e8f9f7 | 74 | * It would call back if there is callback function and set the state to idle. |
<> | 144:ef7eb2e8f9f7 | 75 | * This is not a public API as it is called from other driver functions. |
<> | 144:ef7eb2e8f9f7 | 76 | */ |
<> | 144:ef7eb2e8f9f7 | 77 | static void DSPI_MasterTransferComplete(SPI_Type *base, dspi_master_handle_t *handle); |
<> | 144:ef7eb2e8f9f7 | 78 | |
<> | 144:ef7eb2e8f9f7 | 79 | /*! |
<> | 144:ef7eb2e8f9f7 | 80 | * @brief Slave fill up the TX FIFO with data. |
<> | 144:ef7eb2e8f9f7 | 81 | * This is not a public API as it is called from other driver functions. |
<> | 144:ef7eb2e8f9f7 | 82 | */ |
<> | 144:ef7eb2e8f9f7 | 83 | static void DSPI_SlaveTransferFillUpTxFifo(SPI_Type *base, dspi_slave_handle_t *handle); |
<> | 144:ef7eb2e8f9f7 | 84 | |
<> | 144:ef7eb2e8f9f7 | 85 | /*! |
<> | 144:ef7eb2e8f9f7 | 86 | * @brief Slave finish up a transfer. |
<> | 144:ef7eb2e8f9f7 | 87 | * It would call back if there is callback function and set the state to idle. |
<> | 144:ef7eb2e8f9f7 | 88 | * This is not a public API as it is called from other driver functions. |
<> | 144:ef7eb2e8f9f7 | 89 | */ |
<> | 144:ef7eb2e8f9f7 | 90 | static void DSPI_SlaveTransferComplete(SPI_Type *base, dspi_slave_handle_t *handle); |
<> | 144:ef7eb2e8f9f7 | 91 | |
<> | 144:ef7eb2e8f9f7 | 92 | /*! |
<> | 144:ef7eb2e8f9f7 | 93 | * @brief DSPI common interrupt handler. |
<> | 144:ef7eb2e8f9f7 | 94 | * |
<> | 144:ef7eb2e8f9f7 | 95 | * @param base DSPI peripheral address. |
<> | 144:ef7eb2e8f9f7 | 96 | * @param handle pointer to g_dspiHandle which stores the transfer state. |
<> | 144:ef7eb2e8f9f7 | 97 | */ |
<> | 144:ef7eb2e8f9f7 | 98 | static void DSPI_CommonIRQHandler(SPI_Type *base, void *param); |
<> | 144:ef7eb2e8f9f7 | 99 | |
<> | 144:ef7eb2e8f9f7 | 100 | /*! |
<> | 144:ef7eb2e8f9f7 | 101 | * @brief Master prepare the transfer. |
<> | 144:ef7eb2e8f9f7 | 102 | * Basically it set up dspi_master_handle . |
<> | 144:ef7eb2e8f9f7 | 103 | * This is not a public API as it is called from other driver functions. fsl_dspi_edma.c also call this function. |
<> | 144:ef7eb2e8f9f7 | 104 | */ |
<> | 144:ef7eb2e8f9f7 | 105 | static void DSPI_MasterTransferPrepare(SPI_Type *base, dspi_master_handle_t *handle, dspi_transfer_t *transfer); |
<> | 144:ef7eb2e8f9f7 | 106 | |
<> | 144:ef7eb2e8f9f7 | 107 | /******************************************************************************* |
<> | 144:ef7eb2e8f9f7 | 108 | * Variables |
<> | 144:ef7eb2e8f9f7 | 109 | ******************************************************************************/ |
<> | 144:ef7eb2e8f9f7 | 110 | |
<> | 144:ef7eb2e8f9f7 | 111 | /* Defines constant value arrays for the baud rate pre-scalar and scalar divider values.*/ |
<> | 144:ef7eb2e8f9f7 | 112 | static const uint32_t s_baudratePrescaler[] = {2, 3, 5, 7}; |
<> | 144:ef7eb2e8f9f7 | 113 | static const uint32_t s_baudrateScaler[] = {2, 4, 6, 8, 16, 32, 64, 128, |
<> | 144:ef7eb2e8f9f7 | 114 | 256, 512, 1024, 2048, 4096, 8192, 16384, 32768}; |
<> | 144:ef7eb2e8f9f7 | 115 | |
<> | 144:ef7eb2e8f9f7 | 116 | static const uint32_t s_delayPrescaler[] = {1, 3, 5, 7}; |
<> | 144:ef7eb2e8f9f7 | 117 | static const uint32_t s_delayScaler[] = {2, 4, 8, 16, 32, 64, 128, 256, |
<> | 144:ef7eb2e8f9f7 | 118 | 512, 1024, 2048, 4096, 8192, 16384, 32768, 65536}; |
<> | 144:ef7eb2e8f9f7 | 119 | |
<> | 144:ef7eb2e8f9f7 | 120 | /*! @brief Pointers to dspi bases for each instance. */ |
<> | 144:ef7eb2e8f9f7 | 121 | static SPI_Type *const s_dspiBases[] = SPI_BASE_PTRS; |
<> | 144:ef7eb2e8f9f7 | 122 | |
<> | 144:ef7eb2e8f9f7 | 123 | /*! @brief Pointers to dspi IRQ number for each instance. */ |
<> | 144:ef7eb2e8f9f7 | 124 | static IRQn_Type const s_dspiIRQ[] = SPI_IRQS; |
<> | 144:ef7eb2e8f9f7 | 125 | |
<> | 144:ef7eb2e8f9f7 | 126 | /*! @brief Pointers to dspi clocks for each instance. */ |
<> | 144:ef7eb2e8f9f7 | 127 | static clock_ip_name_t const s_dspiClock[] = DSPI_CLOCKS; |
<> | 144:ef7eb2e8f9f7 | 128 | |
<> | 144:ef7eb2e8f9f7 | 129 | /*! @brief Pointers to dspi handles for each instance. */ |
<> | 144:ef7eb2e8f9f7 | 130 | static void *g_dspiHandle[FSL_FEATURE_SOC_DSPI_COUNT]; |
<> | 144:ef7eb2e8f9f7 | 131 | |
<> | 144:ef7eb2e8f9f7 | 132 | /*! @brief Pointer to master IRQ handler for each instance. */ |
<> | 144:ef7eb2e8f9f7 | 133 | static dspi_master_isr_t s_dspiMasterIsr; |
<> | 144:ef7eb2e8f9f7 | 134 | |
<> | 144:ef7eb2e8f9f7 | 135 | /*! @brief Pointer to slave IRQ handler for each instance. */ |
<> | 144:ef7eb2e8f9f7 | 136 | static dspi_slave_isr_t s_dspiSlaveIsr; |
<> | 144:ef7eb2e8f9f7 | 137 | |
<> | 144:ef7eb2e8f9f7 | 138 | /********************************************************************************************************************** |
<> | 144:ef7eb2e8f9f7 | 139 | * Code |
<> | 144:ef7eb2e8f9f7 | 140 | *********************************************************************************************************************/ |
<> | 144:ef7eb2e8f9f7 | 141 | uint32_t DSPI_GetInstance(SPI_Type *base) |
<> | 144:ef7eb2e8f9f7 | 142 | { |
<> | 144:ef7eb2e8f9f7 | 143 | uint32_t instance; |
<> | 144:ef7eb2e8f9f7 | 144 | |
<> | 144:ef7eb2e8f9f7 | 145 | /* Find the instance index from base address mappings. */ |
<> | 144:ef7eb2e8f9f7 | 146 | for (instance = 0; instance < FSL_FEATURE_SOC_DSPI_COUNT; instance++) |
<> | 144:ef7eb2e8f9f7 | 147 | { |
<> | 144:ef7eb2e8f9f7 | 148 | if (s_dspiBases[instance] == base) |
<> | 144:ef7eb2e8f9f7 | 149 | { |
<> | 144:ef7eb2e8f9f7 | 150 | break; |
<> | 144:ef7eb2e8f9f7 | 151 | } |
<> | 144:ef7eb2e8f9f7 | 152 | } |
<> | 144:ef7eb2e8f9f7 | 153 | |
<> | 144:ef7eb2e8f9f7 | 154 | assert(instance < FSL_FEATURE_SOC_DSPI_COUNT); |
<> | 144:ef7eb2e8f9f7 | 155 | |
<> | 144:ef7eb2e8f9f7 | 156 | return instance; |
<> | 144:ef7eb2e8f9f7 | 157 | } |
<> | 144:ef7eb2e8f9f7 | 158 | |
<> | 144:ef7eb2e8f9f7 | 159 | void DSPI_MasterInit(SPI_Type *base, const dspi_master_config_t *masterConfig, uint32_t srcClock_Hz) |
<> | 144:ef7eb2e8f9f7 | 160 | { |
<> | 144:ef7eb2e8f9f7 | 161 | uint32_t temp; |
<> | 144:ef7eb2e8f9f7 | 162 | /* enable DSPI clock */ |
<> | 144:ef7eb2e8f9f7 | 163 | CLOCK_EnableClock(s_dspiClock[DSPI_GetInstance(base)]); |
<> | 144:ef7eb2e8f9f7 | 164 | |
<> | 144:ef7eb2e8f9f7 | 165 | DSPI_Enable(base, true); |
<> | 144:ef7eb2e8f9f7 | 166 | DSPI_StopTransfer(base); |
<> | 144:ef7eb2e8f9f7 | 167 | |
<> | 144:ef7eb2e8f9f7 | 168 | DSPI_SetMasterSlaveMode(base, kDSPI_Master); |
<> | 144:ef7eb2e8f9f7 | 169 | |
<> | 144:ef7eb2e8f9f7 | 170 | temp = base->MCR & (~(SPI_MCR_CONT_SCKE_MASK | SPI_MCR_MTFE_MASK | SPI_MCR_ROOE_MASK | SPI_MCR_SMPL_PT_MASK | |
<> | 144:ef7eb2e8f9f7 | 171 | SPI_MCR_DIS_TXF_MASK | SPI_MCR_DIS_RXF_MASK)); |
<> | 144:ef7eb2e8f9f7 | 172 | |
<> | 144:ef7eb2e8f9f7 | 173 | base->MCR = temp | SPI_MCR_CONT_SCKE(masterConfig->enableContinuousSCK) | |
<> | 144:ef7eb2e8f9f7 | 174 | SPI_MCR_MTFE(masterConfig->enableModifiedTimingFormat) | |
<> | 144:ef7eb2e8f9f7 | 175 | SPI_MCR_ROOE(masterConfig->enableRxFifoOverWrite) | SPI_MCR_SMPL_PT(masterConfig->samplePoint) | |
<> | 144:ef7eb2e8f9f7 | 176 | SPI_MCR_DIS_TXF(false) | SPI_MCR_DIS_RXF(false); |
<> | 144:ef7eb2e8f9f7 | 177 | |
<> | 144:ef7eb2e8f9f7 | 178 | DSPI_SetOnePcsPolarity(base, masterConfig->whichPcs, masterConfig->pcsActiveHighOrLow); |
<> | 144:ef7eb2e8f9f7 | 179 | |
<> | 144:ef7eb2e8f9f7 | 180 | if (0 == DSPI_MasterSetBaudRate(base, masterConfig->whichCtar, masterConfig->ctarConfig.baudRate, srcClock_Hz)) |
<> | 144:ef7eb2e8f9f7 | 181 | { |
<> | 144:ef7eb2e8f9f7 | 182 | assert(false); |
<> | 144:ef7eb2e8f9f7 | 183 | } |
<> | 144:ef7eb2e8f9f7 | 184 | |
<> | 144:ef7eb2e8f9f7 | 185 | temp = base->CTAR[masterConfig->whichCtar] & |
<> | 144:ef7eb2e8f9f7 | 186 | ~(SPI_CTAR_FMSZ_MASK | SPI_CTAR_CPOL_MASK | SPI_CTAR_CPHA_MASK | SPI_CTAR_LSBFE_MASK); |
<> | 144:ef7eb2e8f9f7 | 187 | |
<> | 144:ef7eb2e8f9f7 | 188 | base->CTAR[masterConfig->whichCtar] = |
<> | 144:ef7eb2e8f9f7 | 189 | temp | SPI_CTAR_FMSZ(masterConfig->ctarConfig.bitsPerFrame - 1) | SPI_CTAR_CPOL(masterConfig->ctarConfig.cpol) | |
<> | 144:ef7eb2e8f9f7 | 190 | SPI_CTAR_CPHA(masterConfig->ctarConfig.cpha) | SPI_CTAR_LSBFE(masterConfig->ctarConfig.direction); |
<> | 144:ef7eb2e8f9f7 | 191 | |
<> | 144:ef7eb2e8f9f7 | 192 | DSPI_MasterSetDelayTimes(base, masterConfig->whichCtar, kDSPI_PcsToSck, srcClock_Hz, |
<> | 144:ef7eb2e8f9f7 | 193 | masterConfig->ctarConfig.pcsToSckDelayInNanoSec); |
<> | 144:ef7eb2e8f9f7 | 194 | DSPI_MasterSetDelayTimes(base, masterConfig->whichCtar, kDSPI_LastSckToPcs, srcClock_Hz, |
<> | 144:ef7eb2e8f9f7 | 195 | masterConfig->ctarConfig.lastSckToPcsDelayInNanoSec); |
<> | 144:ef7eb2e8f9f7 | 196 | DSPI_MasterSetDelayTimes(base, masterConfig->whichCtar, kDSPI_BetweenTransfer, srcClock_Hz, |
<> | 144:ef7eb2e8f9f7 | 197 | masterConfig->ctarConfig.betweenTransferDelayInNanoSec); |
<> | 144:ef7eb2e8f9f7 | 198 | |
<> | 144:ef7eb2e8f9f7 | 199 | DSPI_StartTransfer(base); |
<> | 144:ef7eb2e8f9f7 | 200 | } |
<> | 144:ef7eb2e8f9f7 | 201 | |
<> | 144:ef7eb2e8f9f7 | 202 | void DSPI_MasterGetDefaultConfig(dspi_master_config_t *masterConfig) |
<> | 144:ef7eb2e8f9f7 | 203 | { |
<> | 144:ef7eb2e8f9f7 | 204 | masterConfig->whichCtar = kDSPI_Ctar0; |
<> | 144:ef7eb2e8f9f7 | 205 | masterConfig->ctarConfig.baudRate = 500000; |
<> | 144:ef7eb2e8f9f7 | 206 | masterConfig->ctarConfig.bitsPerFrame = 8; |
<> | 144:ef7eb2e8f9f7 | 207 | masterConfig->ctarConfig.cpol = kDSPI_ClockPolarityActiveHigh; |
<> | 144:ef7eb2e8f9f7 | 208 | masterConfig->ctarConfig.cpha = kDSPI_ClockPhaseFirstEdge; |
<> | 144:ef7eb2e8f9f7 | 209 | masterConfig->ctarConfig.direction = kDSPI_MsbFirst; |
<> | 144:ef7eb2e8f9f7 | 210 | |
<> | 144:ef7eb2e8f9f7 | 211 | masterConfig->ctarConfig.pcsToSckDelayInNanoSec = 1000; |
<> | 144:ef7eb2e8f9f7 | 212 | masterConfig->ctarConfig.lastSckToPcsDelayInNanoSec = 1000; |
<> | 144:ef7eb2e8f9f7 | 213 | masterConfig->ctarConfig.betweenTransferDelayInNanoSec = 1000; |
<> | 144:ef7eb2e8f9f7 | 214 | |
<> | 144:ef7eb2e8f9f7 | 215 | masterConfig->whichPcs = kDSPI_Pcs0; |
<> | 144:ef7eb2e8f9f7 | 216 | masterConfig->pcsActiveHighOrLow = kDSPI_PcsActiveLow; |
<> | 144:ef7eb2e8f9f7 | 217 | |
<> | 144:ef7eb2e8f9f7 | 218 | masterConfig->enableContinuousSCK = false; |
<> | 144:ef7eb2e8f9f7 | 219 | masterConfig->enableRxFifoOverWrite = false; |
<> | 144:ef7eb2e8f9f7 | 220 | masterConfig->enableModifiedTimingFormat = false; |
<> | 144:ef7eb2e8f9f7 | 221 | masterConfig->samplePoint = kDSPI_SckToSin0Clock; |
<> | 144:ef7eb2e8f9f7 | 222 | } |
<> | 144:ef7eb2e8f9f7 | 223 | |
<> | 144:ef7eb2e8f9f7 | 224 | void DSPI_SlaveInit(SPI_Type *base, const dspi_slave_config_t *slaveConfig) |
<> | 144:ef7eb2e8f9f7 | 225 | { |
<> | 144:ef7eb2e8f9f7 | 226 | uint32_t temp = 0; |
<> | 144:ef7eb2e8f9f7 | 227 | |
<> | 144:ef7eb2e8f9f7 | 228 | /* enable DSPI clock */ |
<> | 144:ef7eb2e8f9f7 | 229 | CLOCK_EnableClock(s_dspiClock[DSPI_GetInstance(base)]); |
<> | 144:ef7eb2e8f9f7 | 230 | |
<> | 144:ef7eb2e8f9f7 | 231 | DSPI_Enable(base, true); |
<> | 144:ef7eb2e8f9f7 | 232 | DSPI_StopTransfer(base); |
<> | 144:ef7eb2e8f9f7 | 233 | |
<> | 144:ef7eb2e8f9f7 | 234 | DSPI_SetMasterSlaveMode(base, kDSPI_Slave); |
<> | 144:ef7eb2e8f9f7 | 235 | |
<> | 144:ef7eb2e8f9f7 | 236 | temp = base->MCR & (~(SPI_MCR_CONT_SCKE_MASK | SPI_MCR_MTFE_MASK | SPI_MCR_ROOE_MASK | SPI_MCR_SMPL_PT_MASK | |
<> | 144:ef7eb2e8f9f7 | 237 | SPI_MCR_DIS_TXF_MASK | SPI_MCR_DIS_RXF_MASK)); |
<> | 144:ef7eb2e8f9f7 | 238 | |
<> | 144:ef7eb2e8f9f7 | 239 | base->MCR = temp | SPI_MCR_CONT_SCKE(slaveConfig->enableContinuousSCK) | |
<> | 144:ef7eb2e8f9f7 | 240 | SPI_MCR_MTFE(slaveConfig->enableModifiedTimingFormat) | |
<> | 144:ef7eb2e8f9f7 | 241 | SPI_MCR_ROOE(slaveConfig->enableRxFifoOverWrite) | SPI_MCR_SMPL_PT(slaveConfig->samplePoint) | |
<> | 144:ef7eb2e8f9f7 | 242 | SPI_MCR_DIS_TXF(false) | SPI_MCR_DIS_RXF(false); |
<> | 144:ef7eb2e8f9f7 | 243 | |
<> | 144:ef7eb2e8f9f7 | 244 | DSPI_SetOnePcsPolarity(base, kDSPI_Pcs0, kDSPI_PcsActiveLow); |
<> | 144:ef7eb2e8f9f7 | 245 | |
<> | 144:ef7eb2e8f9f7 | 246 | temp = base->CTAR[slaveConfig->whichCtar] & |
<> | 144:ef7eb2e8f9f7 | 247 | ~(SPI_CTAR_FMSZ_MASK | SPI_CTAR_CPOL_MASK | SPI_CTAR_CPHA_MASK | SPI_CTAR_LSBFE_MASK); |
<> | 144:ef7eb2e8f9f7 | 248 | |
<> | 144:ef7eb2e8f9f7 | 249 | base->CTAR[slaveConfig->whichCtar] = temp | SPI_CTAR_SLAVE_FMSZ(slaveConfig->ctarConfig.bitsPerFrame - 1) | |
<> | 144:ef7eb2e8f9f7 | 250 | SPI_CTAR_SLAVE_CPOL(slaveConfig->ctarConfig.cpol) | |
<> | 144:ef7eb2e8f9f7 | 251 | SPI_CTAR_SLAVE_CPHA(slaveConfig->ctarConfig.cpha); |
<> | 144:ef7eb2e8f9f7 | 252 | |
<> | 144:ef7eb2e8f9f7 | 253 | DSPI_StartTransfer(base); |
<> | 144:ef7eb2e8f9f7 | 254 | } |
<> | 144:ef7eb2e8f9f7 | 255 | |
<> | 144:ef7eb2e8f9f7 | 256 | void DSPI_SlaveGetDefaultConfig(dspi_slave_config_t *slaveConfig) |
<> | 144:ef7eb2e8f9f7 | 257 | { |
<> | 144:ef7eb2e8f9f7 | 258 | slaveConfig->whichCtar = kDSPI_Ctar0; |
<> | 144:ef7eb2e8f9f7 | 259 | slaveConfig->ctarConfig.bitsPerFrame = 8; |
<> | 144:ef7eb2e8f9f7 | 260 | slaveConfig->ctarConfig.cpol = kDSPI_ClockPolarityActiveHigh; |
<> | 144:ef7eb2e8f9f7 | 261 | slaveConfig->ctarConfig.cpha = kDSPI_ClockPhaseFirstEdge; |
<> | 144:ef7eb2e8f9f7 | 262 | |
<> | 144:ef7eb2e8f9f7 | 263 | slaveConfig->enableContinuousSCK = false; |
<> | 144:ef7eb2e8f9f7 | 264 | slaveConfig->enableRxFifoOverWrite = false; |
<> | 144:ef7eb2e8f9f7 | 265 | slaveConfig->enableModifiedTimingFormat = false; |
<> | 144:ef7eb2e8f9f7 | 266 | slaveConfig->samplePoint = kDSPI_SckToSin0Clock; |
<> | 144:ef7eb2e8f9f7 | 267 | } |
<> | 144:ef7eb2e8f9f7 | 268 | |
<> | 144:ef7eb2e8f9f7 | 269 | void DSPI_Deinit(SPI_Type *base) |
<> | 144:ef7eb2e8f9f7 | 270 | { |
<> | 144:ef7eb2e8f9f7 | 271 | DSPI_StopTransfer(base); |
<> | 144:ef7eb2e8f9f7 | 272 | DSPI_Enable(base, false); |
<> | 144:ef7eb2e8f9f7 | 273 | |
<> | 144:ef7eb2e8f9f7 | 274 | /* disable DSPI clock */ |
<> | 144:ef7eb2e8f9f7 | 275 | CLOCK_DisableClock(s_dspiClock[DSPI_GetInstance(base)]); |
<> | 144:ef7eb2e8f9f7 | 276 | } |
<> | 144:ef7eb2e8f9f7 | 277 | |
<> | 144:ef7eb2e8f9f7 | 278 | static void DSPI_SetOnePcsPolarity(SPI_Type *base, dspi_which_pcs_t pcs, dspi_pcs_polarity_config_t activeLowOrHigh) |
<> | 144:ef7eb2e8f9f7 | 279 | { |
<> | 144:ef7eb2e8f9f7 | 280 | uint32_t temp; |
<> | 144:ef7eb2e8f9f7 | 281 | |
<> | 144:ef7eb2e8f9f7 | 282 | temp = base->MCR; |
<> | 144:ef7eb2e8f9f7 | 283 | |
<> | 144:ef7eb2e8f9f7 | 284 | if (activeLowOrHigh == kDSPI_PcsActiveLow) |
<> | 144:ef7eb2e8f9f7 | 285 | { |
<> | 144:ef7eb2e8f9f7 | 286 | temp |= SPI_MCR_PCSIS(pcs); |
<> | 144:ef7eb2e8f9f7 | 287 | } |
<> | 144:ef7eb2e8f9f7 | 288 | else |
<> | 144:ef7eb2e8f9f7 | 289 | { |
<> | 144:ef7eb2e8f9f7 | 290 | temp &= ~SPI_MCR_PCSIS(pcs); |
<> | 144:ef7eb2e8f9f7 | 291 | } |
<> | 144:ef7eb2e8f9f7 | 292 | |
<> | 144:ef7eb2e8f9f7 | 293 | base->MCR = temp; |
<> | 144:ef7eb2e8f9f7 | 294 | } |
<> | 144:ef7eb2e8f9f7 | 295 | |
<> | 144:ef7eb2e8f9f7 | 296 | uint32_t DSPI_MasterSetBaudRate(SPI_Type *base, |
<> | 144:ef7eb2e8f9f7 | 297 | dspi_ctar_selection_t whichCtar, |
<> | 144:ef7eb2e8f9f7 | 298 | uint32_t baudRate_Bps, |
<> | 144:ef7eb2e8f9f7 | 299 | uint32_t srcClock_Hz) |
<> | 144:ef7eb2e8f9f7 | 300 | { |
<> | 144:ef7eb2e8f9f7 | 301 | /* for master mode configuration, if slave mode detected, return 0*/ |
<> | 144:ef7eb2e8f9f7 | 302 | if (!DSPI_IsMaster(base)) |
<> | 144:ef7eb2e8f9f7 | 303 | { |
<> | 144:ef7eb2e8f9f7 | 304 | return 0; |
<> | 144:ef7eb2e8f9f7 | 305 | } |
<> | 144:ef7eb2e8f9f7 | 306 | uint32_t temp; |
<> | 144:ef7eb2e8f9f7 | 307 | uint32_t prescaler, bestPrescaler; |
<> | 144:ef7eb2e8f9f7 | 308 | uint32_t scaler, bestScaler; |
<> | 144:ef7eb2e8f9f7 | 309 | uint32_t dbr, bestDbr; |
<> | 144:ef7eb2e8f9f7 | 310 | uint32_t realBaudrate, bestBaudrate; |
<> | 144:ef7eb2e8f9f7 | 311 | uint32_t diff, min_diff; |
<> | 144:ef7eb2e8f9f7 | 312 | uint32_t baudrate = baudRate_Bps; |
<> | 144:ef7eb2e8f9f7 | 313 | |
<> | 144:ef7eb2e8f9f7 | 314 | /* find combination of prescaler and scaler resulting in baudrate closest to the requested value */ |
<> | 144:ef7eb2e8f9f7 | 315 | min_diff = 0xFFFFFFFFU; |
<> | 144:ef7eb2e8f9f7 | 316 | bestPrescaler = 0; |
<> | 144:ef7eb2e8f9f7 | 317 | bestScaler = 0; |
<> | 144:ef7eb2e8f9f7 | 318 | bestDbr = 1; |
<> | 144:ef7eb2e8f9f7 | 319 | bestBaudrate = 0; /* required to avoid compilation warning */ |
<> | 144:ef7eb2e8f9f7 | 320 | |
<> | 144:ef7eb2e8f9f7 | 321 | /* In all for loops, if min_diff = 0, the exit for loop*/ |
<> | 144:ef7eb2e8f9f7 | 322 | for (prescaler = 0; (prescaler < 4) && min_diff; prescaler++) |
<> | 144:ef7eb2e8f9f7 | 323 | { |
<> | 144:ef7eb2e8f9f7 | 324 | for (scaler = 0; (scaler < 16) && min_diff; scaler++) |
<> | 144:ef7eb2e8f9f7 | 325 | { |
<> | 144:ef7eb2e8f9f7 | 326 | for (dbr = 1; (dbr < 3) && min_diff; dbr++) |
<> | 144:ef7eb2e8f9f7 | 327 | { |
<> | 144:ef7eb2e8f9f7 | 328 | realBaudrate = ((srcClock_Hz * dbr) / (s_baudratePrescaler[prescaler] * (s_baudrateScaler[scaler]))); |
<> | 144:ef7eb2e8f9f7 | 329 | |
<> | 144:ef7eb2e8f9f7 | 330 | /* calculate the baud rate difference based on the conditional statement that states that the calculated |
<> | 144:ef7eb2e8f9f7 | 331 | * baud rate must not exceed the desired baud rate. |
<> | 144:ef7eb2e8f9f7 | 332 | */ |
<> | 144:ef7eb2e8f9f7 | 333 | if (baudrate >= realBaudrate) |
<> | 144:ef7eb2e8f9f7 | 334 | { |
<> | 144:ef7eb2e8f9f7 | 335 | diff = baudrate - realBaudrate; |
<> | 144:ef7eb2e8f9f7 | 336 | if (min_diff > diff) |
<> | 144:ef7eb2e8f9f7 | 337 | { |
<> | 144:ef7eb2e8f9f7 | 338 | /* a better match found */ |
<> | 144:ef7eb2e8f9f7 | 339 | min_diff = diff; |
<> | 144:ef7eb2e8f9f7 | 340 | bestPrescaler = prescaler; |
<> | 144:ef7eb2e8f9f7 | 341 | bestScaler = scaler; |
<> | 144:ef7eb2e8f9f7 | 342 | bestBaudrate = realBaudrate; |
<> | 144:ef7eb2e8f9f7 | 343 | bestDbr = dbr; |
<> | 144:ef7eb2e8f9f7 | 344 | } |
<> | 144:ef7eb2e8f9f7 | 345 | } |
<> | 144:ef7eb2e8f9f7 | 346 | } |
<> | 144:ef7eb2e8f9f7 | 347 | } |
<> | 144:ef7eb2e8f9f7 | 348 | } |
<> | 144:ef7eb2e8f9f7 | 349 | |
<> | 144:ef7eb2e8f9f7 | 350 | /* write the best dbr, prescalar, and baud rate scalar to the CTAR */ |
<> | 144:ef7eb2e8f9f7 | 351 | temp = base->CTAR[whichCtar] & ~(SPI_CTAR_DBR_MASK | SPI_CTAR_PBR_MASK | SPI_CTAR_BR_MASK); |
<> | 144:ef7eb2e8f9f7 | 352 | |
<> | 144:ef7eb2e8f9f7 | 353 | base->CTAR[whichCtar] = temp | ((bestDbr - 1) << SPI_CTAR_DBR_SHIFT) | (bestPrescaler << SPI_CTAR_PBR_SHIFT) | |
<> | 144:ef7eb2e8f9f7 | 354 | (bestScaler << SPI_CTAR_BR_SHIFT); |
<> | 144:ef7eb2e8f9f7 | 355 | |
<> | 144:ef7eb2e8f9f7 | 356 | /* return the actual calculated baud rate */ |
<> | 144:ef7eb2e8f9f7 | 357 | return bestBaudrate; |
<> | 144:ef7eb2e8f9f7 | 358 | } |
<> | 144:ef7eb2e8f9f7 | 359 | |
<> | 144:ef7eb2e8f9f7 | 360 | void DSPI_MasterSetDelayScaler( |
<> | 144:ef7eb2e8f9f7 | 361 | SPI_Type *base, dspi_ctar_selection_t whichCtar, uint32_t prescaler, uint32_t scaler, dspi_delay_type_t whichDelay) |
<> | 144:ef7eb2e8f9f7 | 362 | { |
<> | 144:ef7eb2e8f9f7 | 363 | /* these settings are only relevant in master mode */ |
<> | 144:ef7eb2e8f9f7 | 364 | if (DSPI_IsMaster(base)) |
<> | 144:ef7eb2e8f9f7 | 365 | { |
<> | 144:ef7eb2e8f9f7 | 366 | switch (whichDelay) |
<> | 144:ef7eb2e8f9f7 | 367 | { |
<> | 144:ef7eb2e8f9f7 | 368 | case kDSPI_PcsToSck: |
<> | 144:ef7eb2e8f9f7 | 369 | base->CTAR[whichCtar] = (base->CTAR[whichCtar] & (~SPI_CTAR_PCSSCK_MASK) & (~SPI_CTAR_CSSCK_MASK)) | |
<> | 144:ef7eb2e8f9f7 | 370 | SPI_CTAR_PCSSCK(prescaler) | SPI_CTAR_CSSCK(scaler); |
<> | 144:ef7eb2e8f9f7 | 371 | break; |
<> | 144:ef7eb2e8f9f7 | 372 | case kDSPI_LastSckToPcs: |
<> | 144:ef7eb2e8f9f7 | 373 | base->CTAR[whichCtar] = (base->CTAR[whichCtar] & (~SPI_CTAR_PASC_MASK) & (~SPI_CTAR_ASC_MASK)) | |
<> | 144:ef7eb2e8f9f7 | 374 | SPI_CTAR_PASC(prescaler) | SPI_CTAR_ASC(scaler); |
<> | 144:ef7eb2e8f9f7 | 375 | break; |
<> | 144:ef7eb2e8f9f7 | 376 | case kDSPI_BetweenTransfer: |
<> | 144:ef7eb2e8f9f7 | 377 | base->CTAR[whichCtar] = (base->CTAR[whichCtar] & (~SPI_CTAR_PDT_MASK) & (~SPI_CTAR_DT_MASK)) | |
<> | 144:ef7eb2e8f9f7 | 378 | SPI_CTAR_PDT(prescaler) | SPI_CTAR_DT(scaler); |
<> | 144:ef7eb2e8f9f7 | 379 | break; |
<> | 144:ef7eb2e8f9f7 | 380 | default: |
<> | 144:ef7eb2e8f9f7 | 381 | break; |
<> | 144:ef7eb2e8f9f7 | 382 | } |
<> | 144:ef7eb2e8f9f7 | 383 | } |
<> | 144:ef7eb2e8f9f7 | 384 | } |
<> | 144:ef7eb2e8f9f7 | 385 | |
<> | 144:ef7eb2e8f9f7 | 386 | uint32_t DSPI_MasterSetDelayTimes(SPI_Type *base, |
<> | 144:ef7eb2e8f9f7 | 387 | dspi_ctar_selection_t whichCtar, |
<> | 144:ef7eb2e8f9f7 | 388 | dspi_delay_type_t whichDelay, |
<> | 144:ef7eb2e8f9f7 | 389 | uint32_t srcClock_Hz, |
<> | 144:ef7eb2e8f9f7 | 390 | uint32_t delayTimeInNanoSec) |
<> | 144:ef7eb2e8f9f7 | 391 | { |
<> | 144:ef7eb2e8f9f7 | 392 | /* for master mode configuration, if slave mode detected, return 0 */ |
<> | 144:ef7eb2e8f9f7 | 393 | if (!DSPI_IsMaster(base)) |
<> | 144:ef7eb2e8f9f7 | 394 | { |
<> | 144:ef7eb2e8f9f7 | 395 | return 0; |
<> | 144:ef7eb2e8f9f7 | 396 | } |
<> | 144:ef7eb2e8f9f7 | 397 | |
<> | 144:ef7eb2e8f9f7 | 398 | uint32_t prescaler, bestPrescaler; |
<> | 144:ef7eb2e8f9f7 | 399 | uint32_t scaler, bestScaler; |
<> | 144:ef7eb2e8f9f7 | 400 | uint32_t realDelay, bestDelay; |
<> | 144:ef7eb2e8f9f7 | 401 | uint32_t diff, min_diff; |
<> | 144:ef7eb2e8f9f7 | 402 | uint32_t initialDelayNanoSec; |
<> | 144:ef7eb2e8f9f7 | 403 | |
<> | 144:ef7eb2e8f9f7 | 404 | /* find combination of prescaler and scaler resulting in the delay closest to the |
<> | 144:ef7eb2e8f9f7 | 405 | * requested value |
<> | 144:ef7eb2e8f9f7 | 406 | */ |
<> | 144:ef7eb2e8f9f7 | 407 | min_diff = 0xFFFFFFFFU; |
<> | 144:ef7eb2e8f9f7 | 408 | /* Initialize prescaler and scaler to their max values to generate the max delay */ |
<> | 144:ef7eb2e8f9f7 | 409 | bestPrescaler = 0x3; |
<> | 144:ef7eb2e8f9f7 | 410 | bestScaler = 0xF; |
<> | 144:ef7eb2e8f9f7 | 411 | bestDelay = (((1000000000U * 4) / srcClock_Hz) * s_delayPrescaler[bestPrescaler] * s_delayScaler[bestScaler]) / 4; |
<> | 144:ef7eb2e8f9f7 | 412 | |
<> | 144:ef7eb2e8f9f7 | 413 | /* First calculate the initial, default delay */ |
<> | 144:ef7eb2e8f9f7 | 414 | initialDelayNanoSec = 1000000000U / srcClock_Hz * 2; |
<> | 144:ef7eb2e8f9f7 | 415 | |
<> | 144:ef7eb2e8f9f7 | 416 | /* If the initial, default delay is already greater than the desired delay, then |
<> | 144:ef7eb2e8f9f7 | 417 | * set the delays to their initial value (0) and return the delay. In other words, |
<> | 144:ef7eb2e8f9f7 | 418 | * there is no way to decrease the delay value further. |
<> | 144:ef7eb2e8f9f7 | 419 | */ |
<> | 144:ef7eb2e8f9f7 | 420 | if (initialDelayNanoSec >= delayTimeInNanoSec) |
<> | 144:ef7eb2e8f9f7 | 421 | { |
<> | 144:ef7eb2e8f9f7 | 422 | DSPI_MasterSetDelayScaler(base, whichCtar, 0, 0, whichDelay); |
<> | 144:ef7eb2e8f9f7 | 423 | return initialDelayNanoSec; |
<> | 144:ef7eb2e8f9f7 | 424 | } |
<> | 144:ef7eb2e8f9f7 | 425 | |
<> | 144:ef7eb2e8f9f7 | 426 | /* In all for loops, if min_diff = 0, the exit for loop */ |
<> | 144:ef7eb2e8f9f7 | 427 | for (prescaler = 0; (prescaler < 4) && min_diff; prescaler++) |
<> | 144:ef7eb2e8f9f7 | 428 | { |
<> | 144:ef7eb2e8f9f7 | 429 | for (scaler = 0; (scaler < 16) && min_diff; scaler++) |
<> | 144:ef7eb2e8f9f7 | 430 | { |
<> | 144:ef7eb2e8f9f7 | 431 | realDelay = ((4000000000U / srcClock_Hz) * s_delayPrescaler[prescaler] * s_delayScaler[scaler]) / 4; |
<> | 144:ef7eb2e8f9f7 | 432 | |
<> | 144:ef7eb2e8f9f7 | 433 | /* calculate the delay difference based on the conditional statement |
<> | 144:ef7eb2e8f9f7 | 434 | * that states that the calculated delay must not be less then the desired delay |
<> | 144:ef7eb2e8f9f7 | 435 | */ |
<> | 144:ef7eb2e8f9f7 | 436 | if (realDelay >= delayTimeInNanoSec) |
<> | 144:ef7eb2e8f9f7 | 437 | { |
<> | 144:ef7eb2e8f9f7 | 438 | diff = realDelay - delayTimeInNanoSec; |
<> | 144:ef7eb2e8f9f7 | 439 | if (min_diff > diff) |
<> | 144:ef7eb2e8f9f7 | 440 | { |
<> | 144:ef7eb2e8f9f7 | 441 | /* a better match found */ |
<> | 144:ef7eb2e8f9f7 | 442 | min_diff = diff; |
<> | 144:ef7eb2e8f9f7 | 443 | bestPrescaler = prescaler; |
<> | 144:ef7eb2e8f9f7 | 444 | bestScaler = scaler; |
<> | 144:ef7eb2e8f9f7 | 445 | bestDelay = realDelay; |
<> | 144:ef7eb2e8f9f7 | 446 | } |
<> | 144:ef7eb2e8f9f7 | 447 | } |
<> | 144:ef7eb2e8f9f7 | 448 | } |
<> | 144:ef7eb2e8f9f7 | 449 | } |
<> | 144:ef7eb2e8f9f7 | 450 | |
<> | 144:ef7eb2e8f9f7 | 451 | /* write the best dbr, prescalar, and baud rate scalar to the CTAR */ |
<> | 144:ef7eb2e8f9f7 | 452 | DSPI_MasterSetDelayScaler(base, whichCtar, bestPrescaler, bestScaler, whichDelay); |
<> | 144:ef7eb2e8f9f7 | 453 | |
<> | 144:ef7eb2e8f9f7 | 454 | /* return the actual calculated baud rate */ |
<> | 144:ef7eb2e8f9f7 | 455 | return bestDelay; |
<> | 144:ef7eb2e8f9f7 | 456 | } |
<> | 144:ef7eb2e8f9f7 | 457 | |
<> | 144:ef7eb2e8f9f7 | 458 | void DSPI_GetDefaultDataCommandConfig(dspi_command_data_config_t *command) |
<> | 144:ef7eb2e8f9f7 | 459 | { |
<> | 144:ef7eb2e8f9f7 | 460 | command->isPcsContinuous = false; |
<> | 144:ef7eb2e8f9f7 | 461 | command->whichCtar = kDSPI_Ctar0; |
<> | 144:ef7eb2e8f9f7 | 462 | command->whichPcs = kDSPI_Pcs0; |
<> | 144:ef7eb2e8f9f7 | 463 | command->isEndOfQueue = false; |
<> | 144:ef7eb2e8f9f7 | 464 | command->clearTransferCount = false; |
<> | 144:ef7eb2e8f9f7 | 465 | } |
<> | 144:ef7eb2e8f9f7 | 466 | |
<> | 144:ef7eb2e8f9f7 | 467 | void DSPI_MasterWriteDataBlocking(SPI_Type *base, dspi_command_data_config_t *command, uint16_t data) |
<> | 144:ef7eb2e8f9f7 | 468 | { |
<> | 144:ef7eb2e8f9f7 | 469 | /* First, clear Transmit Complete Flag (TCF) */ |
<> | 144:ef7eb2e8f9f7 | 470 | DSPI_ClearStatusFlags(base, kDSPI_TxCompleteFlag); |
<> | 144:ef7eb2e8f9f7 | 471 | |
<> | 144:ef7eb2e8f9f7 | 472 | while (!(DSPI_GetStatusFlags(base) & kDSPI_TxFifoFillRequestFlag)) |
<> | 144:ef7eb2e8f9f7 | 473 | { |
<> | 144:ef7eb2e8f9f7 | 474 | DSPI_ClearStatusFlags(base, kDSPI_TxFifoFillRequestFlag); |
<> | 144:ef7eb2e8f9f7 | 475 | } |
<> | 144:ef7eb2e8f9f7 | 476 | |
<> | 144:ef7eb2e8f9f7 | 477 | base->PUSHR = SPI_PUSHR_CONT(command->isPcsContinuous) | SPI_PUSHR_CTAS(command->whichCtar) | |
<> | 144:ef7eb2e8f9f7 | 478 | SPI_PUSHR_PCS(command->whichPcs) | SPI_PUSHR_EOQ(command->isEndOfQueue) | |
<> | 144:ef7eb2e8f9f7 | 479 | SPI_PUSHR_CTCNT(command->clearTransferCount) | SPI_PUSHR_TXDATA(data); |
<> | 144:ef7eb2e8f9f7 | 480 | DSPI_ClearStatusFlags(base, kDSPI_TxFifoFillRequestFlag); |
<> | 144:ef7eb2e8f9f7 | 481 | |
<> | 144:ef7eb2e8f9f7 | 482 | /* Wait till TCF sets */ |
<> | 144:ef7eb2e8f9f7 | 483 | while (!(DSPI_GetStatusFlags(base) & kDSPI_TxCompleteFlag)) |
<> | 144:ef7eb2e8f9f7 | 484 | { |
<> | 144:ef7eb2e8f9f7 | 485 | } |
<> | 144:ef7eb2e8f9f7 | 486 | } |
<> | 144:ef7eb2e8f9f7 | 487 | |
<> | 144:ef7eb2e8f9f7 | 488 | void DSPI_MasterWriteCommandDataBlocking(SPI_Type *base, uint32_t data) |
<> | 144:ef7eb2e8f9f7 | 489 | { |
<> | 144:ef7eb2e8f9f7 | 490 | /* First, clear Transmit Complete Flag (TCF) */ |
<> | 144:ef7eb2e8f9f7 | 491 | DSPI_ClearStatusFlags(base, kDSPI_TxCompleteFlag); |
<> | 144:ef7eb2e8f9f7 | 492 | |
<> | 144:ef7eb2e8f9f7 | 493 | while (!(DSPI_GetStatusFlags(base) & kDSPI_TxFifoFillRequestFlag)) |
<> | 144:ef7eb2e8f9f7 | 494 | { |
<> | 144:ef7eb2e8f9f7 | 495 | DSPI_ClearStatusFlags(base, kDSPI_TxFifoFillRequestFlag); |
<> | 144:ef7eb2e8f9f7 | 496 | } |
<> | 144:ef7eb2e8f9f7 | 497 | |
<> | 144:ef7eb2e8f9f7 | 498 | base->PUSHR = data; |
<> | 144:ef7eb2e8f9f7 | 499 | |
<> | 144:ef7eb2e8f9f7 | 500 | DSPI_ClearStatusFlags(base, kDSPI_TxFifoFillRequestFlag); |
<> | 144:ef7eb2e8f9f7 | 501 | |
<> | 144:ef7eb2e8f9f7 | 502 | /* Wait till TCF sets */ |
<> | 144:ef7eb2e8f9f7 | 503 | while (!(DSPI_GetStatusFlags(base) & kDSPI_TxCompleteFlag)) |
<> | 144:ef7eb2e8f9f7 | 504 | { |
<> | 144:ef7eb2e8f9f7 | 505 | } |
<> | 144:ef7eb2e8f9f7 | 506 | } |
<> | 144:ef7eb2e8f9f7 | 507 | |
<> | 144:ef7eb2e8f9f7 | 508 | void DSPI_SlaveWriteDataBlocking(SPI_Type *base, uint32_t data) |
<> | 144:ef7eb2e8f9f7 | 509 | { |
<> | 144:ef7eb2e8f9f7 | 510 | /* First, clear Transmit Complete Flag (TCF) */ |
<> | 144:ef7eb2e8f9f7 | 511 | DSPI_ClearStatusFlags(base, kDSPI_TxCompleteFlag); |
<> | 144:ef7eb2e8f9f7 | 512 | |
<> | 144:ef7eb2e8f9f7 | 513 | while (!(DSPI_GetStatusFlags(base) & kDSPI_TxFifoFillRequestFlag)) |
<> | 144:ef7eb2e8f9f7 | 514 | { |
<> | 144:ef7eb2e8f9f7 | 515 | DSPI_ClearStatusFlags(base, kDSPI_TxFifoFillRequestFlag); |
<> | 144:ef7eb2e8f9f7 | 516 | } |
<> | 144:ef7eb2e8f9f7 | 517 | |
<> | 144:ef7eb2e8f9f7 | 518 | base->PUSHR_SLAVE = data; |
<> | 144:ef7eb2e8f9f7 | 519 | |
<> | 144:ef7eb2e8f9f7 | 520 | DSPI_ClearStatusFlags(base, kDSPI_TxFifoFillRequestFlag); |
<> | 144:ef7eb2e8f9f7 | 521 | |
<> | 144:ef7eb2e8f9f7 | 522 | /* Wait till TCF sets */ |
<> | 144:ef7eb2e8f9f7 | 523 | while (!(DSPI_GetStatusFlags(base) & kDSPI_TxCompleteFlag)) |
<> | 144:ef7eb2e8f9f7 | 524 | { |
<> | 144:ef7eb2e8f9f7 | 525 | } |
<> | 144:ef7eb2e8f9f7 | 526 | } |
<> | 144:ef7eb2e8f9f7 | 527 | |
<> | 144:ef7eb2e8f9f7 | 528 | void DSPI_EnableInterrupts(SPI_Type *base, uint32_t mask) |
<> | 144:ef7eb2e8f9f7 | 529 | { |
<> | 144:ef7eb2e8f9f7 | 530 | if (mask & SPI_RSER_TFFF_RE_MASK) |
<> | 144:ef7eb2e8f9f7 | 531 | { |
<> | 144:ef7eb2e8f9f7 | 532 | base->RSER &= ~SPI_RSER_TFFF_DIRS_MASK; |
<> | 144:ef7eb2e8f9f7 | 533 | } |
<> | 144:ef7eb2e8f9f7 | 534 | if (mask & SPI_RSER_RFDF_RE_MASK) |
<> | 144:ef7eb2e8f9f7 | 535 | { |
<> | 144:ef7eb2e8f9f7 | 536 | base->RSER &= ~SPI_RSER_RFDF_DIRS_MASK; |
<> | 144:ef7eb2e8f9f7 | 537 | } |
<> | 144:ef7eb2e8f9f7 | 538 | base->RSER |= mask; |
<> | 144:ef7eb2e8f9f7 | 539 | } |
<> | 144:ef7eb2e8f9f7 | 540 | |
<> | 144:ef7eb2e8f9f7 | 541 | /*Transactional APIs -- Master*/ |
<> | 144:ef7eb2e8f9f7 | 542 | |
<> | 144:ef7eb2e8f9f7 | 543 | void DSPI_MasterTransferCreateHandle(SPI_Type *base, |
<> | 144:ef7eb2e8f9f7 | 544 | dspi_master_handle_t *handle, |
<> | 144:ef7eb2e8f9f7 | 545 | dspi_master_transfer_callback_t callback, |
<> | 144:ef7eb2e8f9f7 | 546 | void *userData) |
<> | 144:ef7eb2e8f9f7 | 547 | { |
<> | 144:ef7eb2e8f9f7 | 548 | assert(handle); |
<> | 144:ef7eb2e8f9f7 | 549 | |
<> | 144:ef7eb2e8f9f7 | 550 | /* Zero the handle. */ |
<> | 144:ef7eb2e8f9f7 | 551 | memset(handle, 0, sizeof(*handle)); |
<> | 144:ef7eb2e8f9f7 | 552 | |
<> | 144:ef7eb2e8f9f7 | 553 | g_dspiHandle[DSPI_GetInstance(base)] = handle; |
<> | 144:ef7eb2e8f9f7 | 554 | |
<> | 144:ef7eb2e8f9f7 | 555 | handle->callback = callback; |
<> | 144:ef7eb2e8f9f7 | 556 | handle->userData = userData; |
<> | 144:ef7eb2e8f9f7 | 557 | } |
<> | 144:ef7eb2e8f9f7 | 558 | |
<> | 144:ef7eb2e8f9f7 | 559 | status_t DSPI_MasterTransferBlocking(SPI_Type *base, dspi_transfer_t *transfer) |
<> | 144:ef7eb2e8f9f7 | 560 | { |
<> | 144:ef7eb2e8f9f7 | 561 | assert(transfer); |
<> | 144:ef7eb2e8f9f7 | 562 | |
<> | 144:ef7eb2e8f9f7 | 563 | uint16_t wordToSend = 0; |
<> | 144:ef7eb2e8f9f7 | 564 | uint16_t wordReceived = 0; |
<> | 144:ef7eb2e8f9f7 | 565 | uint8_t dummyData = DSPI_MASTER_DUMMY_DATA; |
<> | 144:ef7eb2e8f9f7 | 566 | uint8_t bitsPerFrame; |
<> | 144:ef7eb2e8f9f7 | 567 | |
<> | 144:ef7eb2e8f9f7 | 568 | uint32_t command; |
<> | 144:ef7eb2e8f9f7 | 569 | uint32_t lastCommand; |
<> | 144:ef7eb2e8f9f7 | 570 | |
<> | 144:ef7eb2e8f9f7 | 571 | uint8_t *txData; |
<> | 144:ef7eb2e8f9f7 | 572 | uint8_t *rxData; |
<> | 144:ef7eb2e8f9f7 | 573 | uint32_t remainingSendByteCount; |
<> | 144:ef7eb2e8f9f7 | 574 | uint32_t remainingReceiveByteCount; |
<> | 144:ef7eb2e8f9f7 | 575 | |
<> | 144:ef7eb2e8f9f7 | 576 | uint32_t fifoSize; |
<> | 144:ef7eb2e8f9f7 | 577 | dspi_command_data_config_t commandStruct; |
<> | 144:ef7eb2e8f9f7 | 578 | |
<> | 144:ef7eb2e8f9f7 | 579 | /* If the transfer count is zero, then return immediately.*/ |
<> | 144:ef7eb2e8f9f7 | 580 | if (transfer->dataSize == 0) |
<> | 144:ef7eb2e8f9f7 | 581 | { |
<> | 144:ef7eb2e8f9f7 | 582 | return kStatus_InvalidArgument; |
<> | 144:ef7eb2e8f9f7 | 583 | } |
<> | 144:ef7eb2e8f9f7 | 584 | |
<> | 144:ef7eb2e8f9f7 | 585 | DSPI_StopTransfer(base); |
<> | 144:ef7eb2e8f9f7 | 586 | DSPI_DisableInterrupts(base, kDSPI_AllInterruptEnable); |
<> | 144:ef7eb2e8f9f7 | 587 | DSPI_FlushFifo(base, true, true); |
<> | 144:ef7eb2e8f9f7 | 588 | DSPI_ClearStatusFlags(base, kDSPI_AllStatusFlag); |
<> | 144:ef7eb2e8f9f7 | 589 | |
<> | 144:ef7eb2e8f9f7 | 590 | /*Calculate the command and lastCommand*/ |
<> | 144:ef7eb2e8f9f7 | 591 | commandStruct.whichPcs = |
<> | 144:ef7eb2e8f9f7 | 592 | (dspi_which_pcs_t)(1U << ((transfer->configFlags & DSPI_MASTER_PCS_MASK) >> DSPI_MASTER_PCS_SHIFT)); |
<> | 144:ef7eb2e8f9f7 | 593 | commandStruct.isEndOfQueue = false; |
<> | 144:ef7eb2e8f9f7 | 594 | commandStruct.clearTransferCount = false; |
<> | 144:ef7eb2e8f9f7 | 595 | commandStruct.whichCtar = |
<> | 144:ef7eb2e8f9f7 | 596 | (dspi_ctar_selection_t)((transfer->configFlags & DSPI_MASTER_CTAR_MASK) >> DSPI_MASTER_CTAR_SHIFT); |
<> | 144:ef7eb2e8f9f7 | 597 | commandStruct.isPcsContinuous = (bool)(transfer->configFlags & kDSPI_MasterPcsContinuous); |
<> | 144:ef7eb2e8f9f7 | 598 | |
<> | 144:ef7eb2e8f9f7 | 599 | command = DSPI_MasterGetFormattedCommand(&(commandStruct)); |
<> | 144:ef7eb2e8f9f7 | 600 | |
<> | 144:ef7eb2e8f9f7 | 601 | commandStruct.isPcsContinuous = (bool)(transfer->configFlags & kDSPI_MasterActiveAfterTransfer); |
<> | 144:ef7eb2e8f9f7 | 602 | lastCommand = DSPI_MasterGetFormattedCommand(&(commandStruct)); |
<> | 144:ef7eb2e8f9f7 | 603 | |
<> | 144:ef7eb2e8f9f7 | 604 | /*Calculate the bitsPerFrame*/ |
<> | 144:ef7eb2e8f9f7 | 605 | bitsPerFrame = ((base->CTAR[commandStruct.whichCtar] & SPI_CTAR_FMSZ_MASK) >> SPI_CTAR_FMSZ_SHIFT) + 1; |
<> | 144:ef7eb2e8f9f7 | 606 | |
<> | 144:ef7eb2e8f9f7 | 607 | txData = transfer->txData; |
<> | 144:ef7eb2e8f9f7 | 608 | rxData = transfer->rxData; |
<> | 144:ef7eb2e8f9f7 | 609 | remainingSendByteCount = transfer->dataSize; |
<> | 144:ef7eb2e8f9f7 | 610 | remainingReceiveByteCount = transfer->dataSize; |
<> | 144:ef7eb2e8f9f7 | 611 | |
<> | 144:ef7eb2e8f9f7 | 612 | if ((base->MCR & SPI_MCR_DIS_RXF_MASK) || (base->MCR & SPI_MCR_DIS_TXF_MASK)) |
<> | 144:ef7eb2e8f9f7 | 613 | { |
<> | 144:ef7eb2e8f9f7 | 614 | fifoSize = 1; |
<> | 144:ef7eb2e8f9f7 | 615 | } |
<> | 144:ef7eb2e8f9f7 | 616 | else |
<> | 144:ef7eb2e8f9f7 | 617 | { |
<> | 144:ef7eb2e8f9f7 | 618 | fifoSize = FSL_FEATURE_DSPI_FIFO_SIZEn(base); |
<> | 144:ef7eb2e8f9f7 | 619 | } |
<> | 144:ef7eb2e8f9f7 | 620 | |
<> | 144:ef7eb2e8f9f7 | 621 | DSPI_StartTransfer(base); |
<> | 144:ef7eb2e8f9f7 | 622 | |
<> | 144:ef7eb2e8f9f7 | 623 | if (bitsPerFrame <= 8) |
<> | 144:ef7eb2e8f9f7 | 624 | { |
<> | 144:ef7eb2e8f9f7 | 625 | while (remainingSendByteCount > 0) |
<> | 144:ef7eb2e8f9f7 | 626 | { |
<> | 144:ef7eb2e8f9f7 | 627 | if (remainingSendByteCount == 1) |
<> | 144:ef7eb2e8f9f7 | 628 | { |
<> | 144:ef7eb2e8f9f7 | 629 | while ((remainingReceiveByteCount - remainingSendByteCount) >= fifoSize) |
<> | 144:ef7eb2e8f9f7 | 630 | { |
<> | 144:ef7eb2e8f9f7 | 631 | if (DSPI_GetStatusFlags(base) & kDSPI_RxFifoDrainRequestFlag) |
<> | 144:ef7eb2e8f9f7 | 632 | { |
<> | 144:ef7eb2e8f9f7 | 633 | if (rxData != NULL) |
<> | 144:ef7eb2e8f9f7 | 634 | { |
<> | 144:ef7eb2e8f9f7 | 635 | *(rxData) = DSPI_ReadData(base); |
<> | 144:ef7eb2e8f9f7 | 636 | rxData++; |
<> | 144:ef7eb2e8f9f7 | 637 | } |
<> | 144:ef7eb2e8f9f7 | 638 | else |
<> | 144:ef7eb2e8f9f7 | 639 | { |
<> | 144:ef7eb2e8f9f7 | 640 | DSPI_ReadData(base); |
<> | 144:ef7eb2e8f9f7 | 641 | } |
<> | 144:ef7eb2e8f9f7 | 642 | remainingReceiveByteCount--; |
<> | 144:ef7eb2e8f9f7 | 643 | |
<> | 144:ef7eb2e8f9f7 | 644 | DSPI_ClearStatusFlags(base, kDSPI_RxFifoDrainRequestFlag); |
<> | 144:ef7eb2e8f9f7 | 645 | } |
<> | 144:ef7eb2e8f9f7 | 646 | } |
<> | 144:ef7eb2e8f9f7 | 647 | |
<> | 144:ef7eb2e8f9f7 | 648 | while (!(DSPI_GetStatusFlags(base) & kDSPI_TxFifoFillRequestFlag)) |
<> | 144:ef7eb2e8f9f7 | 649 | { |
<> | 144:ef7eb2e8f9f7 | 650 | DSPI_ClearStatusFlags(base, kDSPI_TxFifoFillRequestFlag); |
<> | 144:ef7eb2e8f9f7 | 651 | } |
<> | 144:ef7eb2e8f9f7 | 652 | |
<> | 144:ef7eb2e8f9f7 | 653 | if (txData != NULL) |
<> | 144:ef7eb2e8f9f7 | 654 | { |
<> | 144:ef7eb2e8f9f7 | 655 | base->PUSHR = (*txData) | (lastCommand); |
<> | 144:ef7eb2e8f9f7 | 656 | txData++; |
<> | 144:ef7eb2e8f9f7 | 657 | } |
<> | 144:ef7eb2e8f9f7 | 658 | else |
<> | 144:ef7eb2e8f9f7 | 659 | { |
<> | 144:ef7eb2e8f9f7 | 660 | base->PUSHR = (lastCommand) | (dummyData); |
<> | 144:ef7eb2e8f9f7 | 661 | } |
<> | 144:ef7eb2e8f9f7 | 662 | DSPI_ClearStatusFlags(base, kDSPI_TxFifoFillRequestFlag); |
<> | 144:ef7eb2e8f9f7 | 663 | remainingSendByteCount--; |
<> | 144:ef7eb2e8f9f7 | 664 | |
<> | 144:ef7eb2e8f9f7 | 665 | while (remainingReceiveByteCount > 0) |
<> | 144:ef7eb2e8f9f7 | 666 | { |
<> | 144:ef7eb2e8f9f7 | 667 | if (DSPI_GetStatusFlags(base) & kDSPI_RxFifoDrainRequestFlag) |
<> | 144:ef7eb2e8f9f7 | 668 | { |
<> | 144:ef7eb2e8f9f7 | 669 | if (rxData != NULL) |
<> | 144:ef7eb2e8f9f7 | 670 | { |
<> | 144:ef7eb2e8f9f7 | 671 | /* Read data from POPR*/ |
<> | 144:ef7eb2e8f9f7 | 672 | *(rxData) = DSPI_ReadData(base); |
<> | 144:ef7eb2e8f9f7 | 673 | rxData++; |
<> | 144:ef7eb2e8f9f7 | 674 | } |
<> | 144:ef7eb2e8f9f7 | 675 | else |
<> | 144:ef7eb2e8f9f7 | 676 | { |
<> | 144:ef7eb2e8f9f7 | 677 | DSPI_ReadData(base); |
<> | 144:ef7eb2e8f9f7 | 678 | } |
<> | 144:ef7eb2e8f9f7 | 679 | remainingReceiveByteCount--; |
<> | 144:ef7eb2e8f9f7 | 680 | |
<> | 144:ef7eb2e8f9f7 | 681 | DSPI_ClearStatusFlags(base, kDSPI_RxFifoDrainRequestFlag); |
<> | 144:ef7eb2e8f9f7 | 682 | } |
<> | 144:ef7eb2e8f9f7 | 683 | } |
<> | 144:ef7eb2e8f9f7 | 684 | } |
<> | 144:ef7eb2e8f9f7 | 685 | else |
<> | 144:ef7eb2e8f9f7 | 686 | { |
<> | 144:ef7eb2e8f9f7 | 687 | /*Wait until Tx Fifo is not full*/ |
<> | 144:ef7eb2e8f9f7 | 688 | while (!(DSPI_GetStatusFlags(base) & kDSPI_TxFifoFillRequestFlag)) |
<> | 144:ef7eb2e8f9f7 | 689 | { |
<> | 144:ef7eb2e8f9f7 | 690 | DSPI_ClearStatusFlags(base, kDSPI_TxFifoFillRequestFlag); |
<> | 144:ef7eb2e8f9f7 | 691 | } |
<> | 144:ef7eb2e8f9f7 | 692 | if (txData != NULL) |
<> | 144:ef7eb2e8f9f7 | 693 | { |
<> | 144:ef7eb2e8f9f7 | 694 | base->PUSHR = command | (uint16_t)(*txData); |
<> | 144:ef7eb2e8f9f7 | 695 | txData++; |
<> | 144:ef7eb2e8f9f7 | 696 | } |
<> | 144:ef7eb2e8f9f7 | 697 | else |
<> | 144:ef7eb2e8f9f7 | 698 | { |
<> | 144:ef7eb2e8f9f7 | 699 | base->PUSHR = command | dummyData; |
<> | 144:ef7eb2e8f9f7 | 700 | } |
<> | 144:ef7eb2e8f9f7 | 701 | remainingSendByteCount--; |
<> | 144:ef7eb2e8f9f7 | 702 | |
<> | 144:ef7eb2e8f9f7 | 703 | DSPI_ClearStatusFlags(base, kDSPI_TxFifoFillRequestFlag); |
<> | 144:ef7eb2e8f9f7 | 704 | |
<> | 144:ef7eb2e8f9f7 | 705 | if (DSPI_GetStatusFlags(base) & kDSPI_RxFifoDrainRequestFlag) |
<> | 144:ef7eb2e8f9f7 | 706 | { |
<> | 144:ef7eb2e8f9f7 | 707 | if (rxData != NULL) |
<> | 144:ef7eb2e8f9f7 | 708 | { |
<> | 144:ef7eb2e8f9f7 | 709 | *(rxData) = DSPI_ReadData(base); |
<> | 144:ef7eb2e8f9f7 | 710 | rxData++; |
<> | 144:ef7eb2e8f9f7 | 711 | } |
<> | 144:ef7eb2e8f9f7 | 712 | else |
<> | 144:ef7eb2e8f9f7 | 713 | { |
<> | 144:ef7eb2e8f9f7 | 714 | DSPI_ReadData(base); |
<> | 144:ef7eb2e8f9f7 | 715 | } |
<> | 144:ef7eb2e8f9f7 | 716 | remainingReceiveByteCount--; |
<> | 144:ef7eb2e8f9f7 | 717 | |
<> | 144:ef7eb2e8f9f7 | 718 | DSPI_ClearStatusFlags(base, kDSPI_RxFifoDrainRequestFlag); |
<> | 144:ef7eb2e8f9f7 | 719 | } |
<> | 144:ef7eb2e8f9f7 | 720 | } |
<> | 144:ef7eb2e8f9f7 | 721 | } |
<> | 144:ef7eb2e8f9f7 | 722 | } |
<> | 144:ef7eb2e8f9f7 | 723 | else |
<> | 144:ef7eb2e8f9f7 | 724 | { |
<> | 144:ef7eb2e8f9f7 | 725 | while (remainingSendByteCount > 0) |
<> | 144:ef7eb2e8f9f7 | 726 | { |
<> | 144:ef7eb2e8f9f7 | 727 | if (remainingSendByteCount <= 2) |
<> | 144:ef7eb2e8f9f7 | 728 | { |
<> | 144:ef7eb2e8f9f7 | 729 | while (((remainingReceiveByteCount - remainingSendByteCount) / 2) >= fifoSize) |
<> | 144:ef7eb2e8f9f7 | 730 | { |
<> | 144:ef7eb2e8f9f7 | 731 | if (DSPI_GetStatusFlags(base) & kDSPI_RxFifoDrainRequestFlag) |
<> | 144:ef7eb2e8f9f7 | 732 | { |
<> | 144:ef7eb2e8f9f7 | 733 | wordReceived = DSPI_ReadData(base); |
<> | 144:ef7eb2e8f9f7 | 734 | |
<> | 144:ef7eb2e8f9f7 | 735 | if (rxData != NULL) |
<> | 144:ef7eb2e8f9f7 | 736 | { |
<> | 144:ef7eb2e8f9f7 | 737 | *rxData = wordReceived; |
<> | 144:ef7eb2e8f9f7 | 738 | ++rxData; |
<> | 144:ef7eb2e8f9f7 | 739 | *rxData = wordReceived >> 8; |
<> | 144:ef7eb2e8f9f7 | 740 | ++rxData; |
<> | 144:ef7eb2e8f9f7 | 741 | } |
<> | 144:ef7eb2e8f9f7 | 742 | remainingReceiveByteCount -= 2; |
<> | 144:ef7eb2e8f9f7 | 743 | |
<> | 144:ef7eb2e8f9f7 | 744 | DSPI_ClearStatusFlags(base, kDSPI_RxFifoDrainRequestFlag); |
<> | 144:ef7eb2e8f9f7 | 745 | } |
<> | 144:ef7eb2e8f9f7 | 746 | } |
<> | 144:ef7eb2e8f9f7 | 747 | |
<> | 144:ef7eb2e8f9f7 | 748 | while (!(DSPI_GetStatusFlags(base) & kDSPI_TxFifoFillRequestFlag)) |
<> | 144:ef7eb2e8f9f7 | 749 | { |
<> | 144:ef7eb2e8f9f7 | 750 | DSPI_ClearStatusFlags(base, kDSPI_TxFifoFillRequestFlag); |
<> | 144:ef7eb2e8f9f7 | 751 | } |
<> | 144:ef7eb2e8f9f7 | 752 | |
<> | 144:ef7eb2e8f9f7 | 753 | if (txData != NULL) |
<> | 144:ef7eb2e8f9f7 | 754 | { |
<> | 144:ef7eb2e8f9f7 | 755 | wordToSend = *(txData); |
<> | 144:ef7eb2e8f9f7 | 756 | ++txData; |
<> | 144:ef7eb2e8f9f7 | 757 | |
<> | 144:ef7eb2e8f9f7 | 758 | if (remainingSendByteCount > 1) |
<> | 144:ef7eb2e8f9f7 | 759 | { |
<> | 144:ef7eb2e8f9f7 | 760 | wordToSend |= (unsigned)(*(txData)) << 8U; |
<> | 144:ef7eb2e8f9f7 | 761 | ++txData; |
<> | 144:ef7eb2e8f9f7 | 762 | } |
<> | 144:ef7eb2e8f9f7 | 763 | } |
<> | 144:ef7eb2e8f9f7 | 764 | else |
<> | 144:ef7eb2e8f9f7 | 765 | { |
<> | 144:ef7eb2e8f9f7 | 766 | wordToSend = dummyData; |
<> | 144:ef7eb2e8f9f7 | 767 | } |
<> | 144:ef7eb2e8f9f7 | 768 | |
<> | 144:ef7eb2e8f9f7 | 769 | base->PUSHR = lastCommand | wordToSend; |
<> | 144:ef7eb2e8f9f7 | 770 | |
<> | 144:ef7eb2e8f9f7 | 771 | DSPI_ClearStatusFlags(base, kDSPI_TxFifoFillRequestFlag); |
<> | 144:ef7eb2e8f9f7 | 772 | remainingSendByteCount = 0; |
<> | 144:ef7eb2e8f9f7 | 773 | |
<> | 144:ef7eb2e8f9f7 | 774 | while (remainingReceiveByteCount > 0) |
<> | 144:ef7eb2e8f9f7 | 775 | { |
<> | 144:ef7eb2e8f9f7 | 776 | if (DSPI_GetStatusFlags(base) & kDSPI_RxFifoDrainRequestFlag) |
<> | 144:ef7eb2e8f9f7 | 777 | { |
<> | 144:ef7eb2e8f9f7 | 778 | wordReceived = DSPI_ReadData(base); |
<> | 144:ef7eb2e8f9f7 | 779 | |
<> | 144:ef7eb2e8f9f7 | 780 | if (remainingReceiveByteCount != 1) |
<> | 144:ef7eb2e8f9f7 | 781 | { |
<> | 144:ef7eb2e8f9f7 | 782 | if (rxData != NULL) |
<> | 144:ef7eb2e8f9f7 | 783 | { |
<> | 144:ef7eb2e8f9f7 | 784 | *(rxData) = wordReceived; |
<> | 144:ef7eb2e8f9f7 | 785 | ++rxData; |
<> | 144:ef7eb2e8f9f7 | 786 | *(rxData) = wordReceived >> 8; |
<> | 144:ef7eb2e8f9f7 | 787 | ++rxData; |
<> | 144:ef7eb2e8f9f7 | 788 | } |
<> | 144:ef7eb2e8f9f7 | 789 | remainingReceiveByteCount -= 2; |
<> | 144:ef7eb2e8f9f7 | 790 | } |
<> | 144:ef7eb2e8f9f7 | 791 | else |
<> | 144:ef7eb2e8f9f7 | 792 | { |
<> | 144:ef7eb2e8f9f7 | 793 | if (rxData != NULL) |
<> | 144:ef7eb2e8f9f7 | 794 | { |
<> | 144:ef7eb2e8f9f7 | 795 | *(rxData) = wordReceived; |
<> | 144:ef7eb2e8f9f7 | 796 | ++rxData; |
<> | 144:ef7eb2e8f9f7 | 797 | } |
<> | 144:ef7eb2e8f9f7 | 798 | remainingReceiveByteCount--; |
<> | 144:ef7eb2e8f9f7 | 799 | } |
<> | 144:ef7eb2e8f9f7 | 800 | DSPI_ClearStatusFlags(base, kDSPI_RxFifoDrainRequestFlag); |
<> | 144:ef7eb2e8f9f7 | 801 | } |
<> | 144:ef7eb2e8f9f7 | 802 | } |
<> | 144:ef7eb2e8f9f7 | 803 | } |
<> | 144:ef7eb2e8f9f7 | 804 | else |
<> | 144:ef7eb2e8f9f7 | 805 | { |
<> | 144:ef7eb2e8f9f7 | 806 | /*Wait until Tx Fifo is not full*/ |
<> | 144:ef7eb2e8f9f7 | 807 | while (!(DSPI_GetStatusFlags(base) & kDSPI_TxFifoFillRequestFlag)) |
<> | 144:ef7eb2e8f9f7 | 808 | { |
<> | 144:ef7eb2e8f9f7 | 809 | DSPI_ClearStatusFlags(base, kDSPI_TxFifoFillRequestFlag); |
<> | 144:ef7eb2e8f9f7 | 810 | } |
<> | 144:ef7eb2e8f9f7 | 811 | |
<> | 144:ef7eb2e8f9f7 | 812 | if (txData != NULL) |
<> | 144:ef7eb2e8f9f7 | 813 | { |
<> | 144:ef7eb2e8f9f7 | 814 | wordToSend = *(txData); |
<> | 144:ef7eb2e8f9f7 | 815 | ++txData; |
<> | 144:ef7eb2e8f9f7 | 816 | wordToSend |= (unsigned)(*(txData)) << 8U; |
<> | 144:ef7eb2e8f9f7 | 817 | ++txData; |
<> | 144:ef7eb2e8f9f7 | 818 | } |
<> | 144:ef7eb2e8f9f7 | 819 | else |
<> | 144:ef7eb2e8f9f7 | 820 | { |
<> | 144:ef7eb2e8f9f7 | 821 | wordToSend = dummyData; |
<> | 144:ef7eb2e8f9f7 | 822 | } |
<> | 144:ef7eb2e8f9f7 | 823 | base->PUSHR = command | wordToSend; |
<> | 144:ef7eb2e8f9f7 | 824 | remainingSendByteCount -= 2; |
<> | 144:ef7eb2e8f9f7 | 825 | |
<> | 144:ef7eb2e8f9f7 | 826 | DSPI_ClearStatusFlags(base, kDSPI_TxFifoFillRequestFlag); |
<> | 144:ef7eb2e8f9f7 | 827 | |
<> | 144:ef7eb2e8f9f7 | 828 | if (DSPI_GetStatusFlags(base) & kDSPI_RxFifoDrainRequestFlag) |
<> | 144:ef7eb2e8f9f7 | 829 | { |
<> | 144:ef7eb2e8f9f7 | 830 | wordReceived = DSPI_ReadData(base); |
<> | 144:ef7eb2e8f9f7 | 831 | |
<> | 144:ef7eb2e8f9f7 | 832 | if (rxData != NULL) |
<> | 144:ef7eb2e8f9f7 | 833 | { |
<> | 144:ef7eb2e8f9f7 | 834 | *rxData = wordReceived; |
<> | 144:ef7eb2e8f9f7 | 835 | ++rxData; |
<> | 144:ef7eb2e8f9f7 | 836 | *rxData = wordReceived >> 8; |
<> | 144:ef7eb2e8f9f7 | 837 | ++rxData; |
<> | 144:ef7eb2e8f9f7 | 838 | } |
<> | 144:ef7eb2e8f9f7 | 839 | remainingReceiveByteCount -= 2; |
<> | 144:ef7eb2e8f9f7 | 840 | |
<> | 144:ef7eb2e8f9f7 | 841 | DSPI_ClearStatusFlags(base, kDSPI_RxFifoDrainRequestFlag); |
<> | 144:ef7eb2e8f9f7 | 842 | } |
<> | 144:ef7eb2e8f9f7 | 843 | } |
<> | 144:ef7eb2e8f9f7 | 844 | } |
<> | 144:ef7eb2e8f9f7 | 845 | } |
<> | 144:ef7eb2e8f9f7 | 846 | |
<> | 144:ef7eb2e8f9f7 | 847 | return kStatus_Success; |
<> | 144:ef7eb2e8f9f7 | 848 | } |
<> | 144:ef7eb2e8f9f7 | 849 | |
<> | 144:ef7eb2e8f9f7 | 850 | static void DSPI_MasterTransferPrepare(SPI_Type *base, dspi_master_handle_t *handle, dspi_transfer_t *transfer) |
<> | 144:ef7eb2e8f9f7 | 851 | { |
<> | 144:ef7eb2e8f9f7 | 852 | dspi_command_data_config_t commandStruct; |
<> | 144:ef7eb2e8f9f7 | 853 | |
<> | 144:ef7eb2e8f9f7 | 854 | DSPI_StopTransfer(base); |
<> | 144:ef7eb2e8f9f7 | 855 | DSPI_FlushFifo(base, true, true); |
<> | 144:ef7eb2e8f9f7 | 856 | DSPI_ClearStatusFlags(base, kDSPI_AllStatusFlag); |
<> | 144:ef7eb2e8f9f7 | 857 | |
<> | 144:ef7eb2e8f9f7 | 858 | commandStruct.whichPcs = |
<> | 144:ef7eb2e8f9f7 | 859 | (dspi_which_pcs_t)(1U << ((transfer->configFlags & DSPI_MASTER_PCS_MASK) >> DSPI_MASTER_PCS_SHIFT)); |
<> | 144:ef7eb2e8f9f7 | 860 | commandStruct.isEndOfQueue = false; |
<> | 144:ef7eb2e8f9f7 | 861 | commandStruct.clearTransferCount = false; |
<> | 144:ef7eb2e8f9f7 | 862 | commandStruct.whichCtar = |
<> | 144:ef7eb2e8f9f7 | 863 | (dspi_ctar_selection_t)((transfer->configFlags & DSPI_MASTER_CTAR_MASK) >> DSPI_MASTER_CTAR_SHIFT); |
<> | 144:ef7eb2e8f9f7 | 864 | commandStruct.isPcsContinuous = (bool)(transfer->configFlags & kDSPI_MasterPcsContinuous); |
<> | 144:ef7eb2e8f9f7 | 865 | handle->command = DSPI_MasterGetFormattedCommand(&(commandStruct)); |
<> | 144:ef7eb2e8f9f7 | 866 | |
<> | 144:ef7eb2e8f9f7 | 867 | commandStruct.isPcsContinuous = (bool)(transfer->configFlags & kDSPI_MasterActiveAfterTransfer); |
<> | 144:ef7eb2e8f9f7 | 868 | handle->lastCommand = DSPI_MasterGetFormattedCommand(&(commandStruct)); |
<> | 144:ef7eb2e8f9f7 | 869 | |
<> | 144:ef7eb2e8f9f7 | 870 | handle->bitsPerFrame = ((base->CTAR[commandStruct.whichCtar] & SPI_CTAR_FMSZ_MASK) >> SPI_CTAR_FMSZ_SHIFT) + 1; |
<> | 144:ef7eb2e8f9f7 | 871 | |
<> | 144:ef7eb2e8f9f7 | 872 | if ((base->MCR & SPI_MCR_DIS_RXF_MASK) || (base->MCR & SPI_MCR_DIS_TXF_MASK)) |
<> | 144:ef7eb2e8f9f7 | 873 | { |
<> | 144:ef7eb2e8f9f7 | 874 | handle->fifoSize = 1; |
<> | 144:ef7eb2e8f9f7 | 875 | } |
<> | 144:ef7eb2e8f9f7 | 876 | else |
<> | 144:ef7eb2e8f9f7 | 877 | { |
<> | 144:ef7eb2e8f9f7 | 878 | handle->fifoSize = FSL_FEATURE_DSPI_FIFO_SIZEn(base); |
<> | 144:ef7eb2e8f9f7 | 879 | } |
<> | 144:ef7eb2e8f9f7 | 880 | handle->txData = transfer->txData; |
<> | 144:ef7eb2e8f9f7 | 881 | handle->rxData = transfer->rxData; |
<> | 144:ef7eb2e8f9f7 | 882 | handle->remainingSendByteCount = transfer->dataSize; |
<> | 144:ef7eb2e8f9f7 | 883 | handle->remainingReceiveByteCount = transfer->dataSize; |
<> | 144:ef7eb2e8f9f7 | 884 | handle->totalByteCount = transfer->dataSize; |
<> | 144:ef7eb2e8f9f7 | 885 | } |
<> | 144:ef7eb2e8f9f7 | 886 | |
<> | 144:ef7eb2e8f9f7 | 887 | status_t DSPI_MasterTransferNonBlocking(SPI_Type *base, dspi_master_handle_t *handle, dspi_transfer_t *transfer) |
<> | 144:ef7eb2e8f9f7 | 888 | { |
<> | 144:ef7eb2e8f9f7 | 889 | assert(handle && transfer); |
<> | 144:ef7eb2e8f9f7 | 890 | |
<> | 144:ef7eb2e8f9f7 | 891 | /* If the transfer count is zero, then return immediately.*/ |
<> | 144:ef7eb2e8f9f7 | 892 | if (transfer->dataSize == 0) |
<> | 144:ef7eb2e8f9f7 | 893 | { |
<> | 144:ef7eb2e8f9f7 | 894 | return kStatus_InvalidArgument; |
<> | 144:ef7eb2e8f9f7 | 895 | } |
<> | 144:ef7eb2e8f9f7 | 896 | |
<> | 144:ef7eb2e8f9f7 | 897 | /* Check that we're not busy.*/ |
<> | 144:ef7eb2e8f9f7 | 898 | if (handle->state == kDSPI_Busy) |
<> | 144:ef7eb2e8f9f7 | 899 | { |
<> | 144:ef7eb2e8f9f7 | 900 | return kStatus_DSPI_Busy; |
<> | 144:ef7eb2e8f9f7 | 901 | } |
<> | 144:ef7eb2e8f9f7 | 902 | |
<> | 144:ef7eb2e8f9f7 | 903 | handle->state = kDSPI_Busy; |
<> | 144:ef7eb2e8f9f7 | 904 | |
<> | 144:ef7eb2e8f9f7 | 905 | DSPI_MasterTransferPrepare(base, handle, transfer); |
<> | 144:ef7eb2e8f9f7 | 906 | DSPI_StartTransfer(base); |
<> | 144:ef7eb2e8f9f7 | 907 | |
<> | 144:ef7eb2e8f9f7 | 908 | /* Enable the NVIC for DSPI peripheral. */ |
<> | 144:ef7eb2e8f9f7 | 909 | EnableIRQ(s_dspiIRQ[DSPI_GetInstance(base)]); |
<> | 144:ef7eb2e8f9f7 | 910 | |
<> | 144:ef7eb2e8f9f7 | 911 | DSPI_MasterTransferFillUpTxFifo(base, handle); |
<> | 144:ef7eb2e8f9f7 | 912 | |
<> | 144:ef7eb2e8f9f7 | 913 | /* RX FIFO Drain request: RFDF_RE to enable RFDF interrupt |
<> | 144:ef7eb2e8f9f7 | 914 | * Since SPI is a synchronous interface, we only need to enable the RX interrupt. |
<> | 144:ef7eb2e8f9f7 | 915 | * The IRQ handler will get the status of RX and TX interrupt flags. |
<> | 144:ef7eb2e8f9f7 | 916 | */ |
<> | 144:ef7eb2e8f9f7 | 917 | s_dspiMasterIsr = DSPI_MasterTransferHandleIRQ; |
<> | 144:ef7eb2e8f9f7 | 918 | |
<> | 144:ef7eb2e8f9f7 | 919 | DSPI_EnableInterrupts(base, kDSPI_RxFifoDrainRequestInterruptEnable); |
<> | 144:ef7eb2e8f9f7 | 920 | |
<> | 144:ef7eb2e8f9f7 | 921 | return kStatus_Success; |
<> | 144:ef7eb2e8f9f7 | 922 | } |
<> | 144:ef7eb2e8f9f7 | 923 | |
<> | 144:ef7eb2e8f9f7 | 924 | status_t DSPI_MasterTransferGetCount(SPI_Type *base, dspi_master_handle_t *handle, size_t *count) |
<> | 144:ef7eb2e8f9f7 | 925 | { |
<> | 144:ef7eb2e8f9f7 | 926 | assert(handle); |
<> | 144:ef7eb2e8f9f7 | 927 | |
<> | 144:ef7eb2e8f9f7 | 928 | if (!count) |
<> | 144:ef7eb2e8f9f7 | 929 | { |
<> | 144:ef7eb2e8f9f7 | 930 | return kStatus_InvalidArgument; |
<> | 144:ef7eb2e8f9f7 | 931 | } |
<> | 144:ef7eb2e8f9f7 | 932 | |
<> | 144:ef7eb2e8f9f7 | 933 | /* Catch when there is not an active transfer. */ |
<> | 144:ef7eb2e8f9f7 | 934 | if (handle->state != kDSPI_Busy) |
<> | 144:ef7eb2e8f9f7 | 935 | { |
<> | 144:ef7eb2e8f9f7 | 936 | *count = 0; |
<> | 144:ef7eb2e8f9f7 | 937 | return kStatus_NoTransferInProgress; |
<> | 144:ef7eb2e8f9f7 | 938 | } |
<> | 144:ef7eb2e8f9f7 | 939 | |
<> | 144:ef7eb2e8f9f7 | 940 | *count = handle->totalByteCount - handle->remainingReceiveByteCount; |
<> | 144:ef7eb2e8f9f7 | 941 | return kStatus_Success; |
<> | 144:ef7eb2e8f9f7 | 942 | } |
<> | 144:ef7eb2e8f9f7 | 943 | |
<> | 144:ef7eb2e8f9f7 | 944 | static void DSPI_MasterTransferComplete(SPI_Type *base, dspi_master_handle_t *handle) |
<> | 144:ef7eb2e8f9f7 | 945 | { |
<> | 144:ef7eb2e8f9f7 | 946 | /* Disable interrupt requests*/ |
<> | 144:ef7eb2e8f9f7 | 947 | DSPI_DisableInterrupts(base, kDSPI_RxFifoDrainRequestInterruptEnable | kDSPI_TxFifoFillRequestInterruptEnable); |
<> | 144:ef7eb2e8f9f7 | 948 | |
<> | 144:ef7eb2e8f9f7 | 949 | status_t status = 0; |
<> | 144:ef7eb2e8f9f7 | 950 | if (handle->state == kDSPI_Error) |
<> | 144:ef7eb2e8f9f7 | 951 | { |
<> | 144:ef7eb2e8f9f7 | 952 | status = kStatus_DSPI_Error; |
<> | 144:ef7eb2e8f9f7 | 953 | } |
<> | 144:ef7eb2e8f9f7 | 954 | else |
<> | 144:ef7eb2e8f9f7 | 955 | { |
<> | 144:ef7eb2e8f9f7 | 956 | status = kStatus_Success; |
<> | 144:ef7eb2e8f9f7 | 957 | } |
<> | 144:ef7eb2e8f9f7 | 958 | |
<> | 144:ef7eb2e8f9f7 | 959 | if (handle->callback) |
<> | 144:ef7eb2e8f9f7 | 960 | { |
<> | 144:ef7eb2e8f9f7 | 961 | handle->callback(base, handle, status, handle->userData); |
<> | 144:ef7eb2e8f9f7 | 962 | } |
<> | 144:ef7eb2e8f9f7 | 963 | |
<> | 144:ef7eb2e8f9f7 | 964 | /* The transfer is complete.*/ |
<> | 144:ef7eb2e8f9f7 | 965 | handle->state = kDSPI_Idle; |
<> | 144:ef7eb2e8f9f7 | 966 | } |
<> | 144:ef7eb2e8f9f7 | 967 | |
<> | 144:ef7eb2e8f9f7 | 968 | static void DSPI_MasterTransferFillUpTxFifo(SPI_Type *base, dspi_master_handle_t *handle) |
<> | 144:ef7eb2e8f9f7 | 969 | { |
<> | 144:ef7eb2e8f9f7 | 970 | uint16_t wordToSend = 0; |
<> | 144:ef7eb2e8f9f7 | 971 | uint8_t dummyData = DSPI_MASTER_DUMMY_DATA; |
<> | 144:ef7eb2e8f9f7 | 972 | |
<> | 144:ef7eb2e8f9f7 | 973 | /* If bits/frame is greater than one byte */ |
<> | 144:ef7eb2e8f9f7 | 974 | if (handle->bitsPerFrame > 8) |
<> | 144:ef7eb2e8f9f7 | 975 | { |
<> | 144:ef7eb2e8f9f7 | 976 | /* Fill the fifo until it is full or until the send word count is 0 or until the difference |
<> | 144:ef7eb2e8f9f7 | 977 | * between the remainingReceiveByteCount and remainingSendByteCount equals the FIFO depth. |
<> | 144:ef7eb2e8f9f7 | 978 | * The reason for checking the difference is to ensure we only send as much as the |
<> | 144:ef7eb2e8f9f7 | 979 | * RX FIFO can receive. |
<> | 144:ef7eb2e8f9f7 | 980 | * For this case where bitsPerFrame > 8, each entry in the FIFO contains 2 bytes of the |
<> | 144:ef7eb2e8f9f7 | 981 | * send data, hence the difference between the remainingReceiveByteCount and |
<> | 144:ef7eb2e8f9f7 | 982 | * remainingSendByteCount must be divided by 2 to convert this difference into a |
<> | 144:ef7eb2e8f9f7 | 983 | * 16-bit (2 byte) value. |
<> | 144:ef7eb2e8f9f7 | 984 | */ |
<> | 144:ef7eb2e8f9f7 | 985 | while ((DSPI_GetStatusFlags(base) & kDSPI_TxFifoFillRequestFlag) && |
<> | 144:ef7eb2e8f9f7 | 986 | ((handle->remainingReceiveByteCount - handle->remainingSendByteCount) / 2 < handle->fifoSize)) |
<> | 144:ef7eb2e8f9f7 | 987 | { |
<> | 144:ef7eb2e8f9f7 | 988 | if (handle->remainingSendByteCount <= 2) |
<> | 144:ef7eb2e8f9f7 | 989 | { |
<> | 144:ef7eb2e8f9f7 | 990 | if (handle->txData) |
<> | 144:ef7eb2e8f9f7 | 991 | { |
<> | 144:ef7eb2e8f9f7 | 992 | if (handle->remainingSendByteCount == 1) |
<> | 144:ef7eb2e8f9f7 | 993 | { |
<> | 144:ef7eb2e8f9f7 | 994 | wordToSend = *(handle->txData); |
<> | 144:ef7eb2e8f9f7 | 995 | } |
<> | 144:ef7eb2e8f9f7 | 996 | else |
<> | 144:ef7eb2e8f9f7 | 997 | { |
<> | 144:ef7eb2e8f9f7 | 998 | wordToSend = *(handle->txData); |
<> | 144:ef7eb2e8f9f7 | 999 | ++handle->txData; /* increment to next data byte */ |
<> | 144:ef7eb2e8f9f7 | 1000 | wordToSend |= (unsigned)(*(handle->txData)) << 8U; |
<> | 144:ef7eb2e8f9f7 | 1001 | } |
<> | 144:ef7eb2e8f9f7 | 1002 | } |
<> | 144:ef7eb2e8f9f7 | 1003 | else |
<> | 144:ef7eb2e8f9f7 | 1004 | { |
<> | 144:ef7eb2e8f9f7 | 1005 | wordToSend = dummyData; |
<> | 144:ef7eb2e8f9f7 | 1006 | } |
<> | 144:ef7eb2e8f9f7 | 1007 | handle->remainingSendByteCount = 0; |
<> | 144:ef7eb2e8f9f7 | 1008 | base->PUSHR = handle->lastCommand | wordToSend; |
<> | 144:ef7eb2e8f9f7 | 1009 | } |
<> | 144:ef7eb2e8f9f7 | 1010 | /* For all words except the last word */ |
<> | 144:ef7eb2e8f9f7 | 1011 | else |
<> | 144:ef7eb2e8f9f7 | 1012 | { |
<> | 144:ef7eb2e8f9f7 | 1013 | if (handle->txData) |
<> | 144:ef7eb2e8f9f7 | 1014 | { |
<> | 144:ef7eb2e8f9f7 | 1015 | wordToSend = *(handle->txData); |
<> | 144:ef7eb2e8f9f7 | 1016 | ++handle->txData; /* increment to next data byte */ |
<> | 144:ef7eb2e8f9f7 | 1017 | wordToSend |= (unsigned)(*(handle->txData)) << 8U; |
<> | 144:ef7eb2e8f9f7 | 1018 | ++handle->txData; /* increment to next data byte */ |
<> | 144:ef7eb2e8f9f7 | 1019 | } |
<> | 144:ef7eb2e8f9f7 | 1020 | else |
<> | 144:ef7eb2e8f9f7 | 1021 | { |
<> | 144:ef7eb2e8f9f7 | 1022 | wordToSend = dummyData; |
<> | 144:ef7eb2e8f9f7 | 1023 | } |
<> | 144:ef7eb2e8f9f7 | 1024 | handle->remainingSendByteCount -= 2; /* decrement remainingSendByteCount by 2 */ |
<> | 144:ef7eb2e8f9f7 | 1025 | base->PUSHR = handle->command | wordToSend; |
<> | 144:ef7eb2e8f9f7 | 1026 | } |
<> | 144:ef7eb2e8f9f7 | 1027 | |
<> | 144:ef7eb2e8f9f7 | 1028 | /* Try to clear the TFFF; if the TX FIFO is full this will clear */ |
<> | 144:ef7eb2e8f9f7 | 1029 | DSPI_ClearStatusFlags(base, kDSPI_TxFifoFillRequestFlag); |
<> | 144:ef7eb2e8f9f7 | 1030 | |
<> | 144:ef7eb2e8f9f7 | 1031 | /* exit loop if send count is zero, else update local variables for next loop */ |
<> | 144:ef7eb2e8f9f7 | 1032 | if (handle->remainingSendByteCount == 0) |
<> | 144:ef7eb2e8f9f7 | 1033 | { |
<> | 144:ef7eb2e8f9f7 | 1034 | break; |
<> | 144:ef7eb2e8f9f7 | 1035 | } |
<> | 144:ef7eb2e8f9f7 | 1036 | } /* End of TX FIFO fill while loop */ |
<> | 144:ef7eb2e8f9f7 | 1037 | } |
<> | 144:ef7eb2e8f9f7 | 1038 | /* Optimized for bits/frame less than or equal to one byte. */ |
<> | 144:ef7eb2e8f9f7 | 1039 | else |
<> | 144:ef7eb2e8f9f7 | 1040 | { |
<> | 144:ef7eb2e8f9f7 | 1041 | /* Fill the fifo until it is full or until the send word count is 0 or until the difference |
<> | 144:ef7eb2e8f9f7 | 1042 | * between the remainingReceiveByteCount and remainingSendByteCount equals the FIFO depth. |
<> | 144:ef7eb2e8f9f7 | 1043 | * The reason for checking the difference is to ensure we only send as much as the |
<> | 144:ef7eb2e8f9f7 | 1044 | * RX FIFO can receive. |
<> | 144:ef7eb2e8f9f7 | 1045 | */ |
<> | 144:ef7eb2e8f9f7 | 1046 | while ((DSPI_GetStatusFlags(base) & kDSPI_TxFifoFillRequestFlag) && |
<> | 144:ef7eb2e8f9f7 | 1047 | ((handle->remainingReceiveByteCount - handle->remainingSendByteCount) < handle->fifoSize)) |
<> | 144:ef7eb2e8f9f7 | 1048 | { |
<> | 144:ef7eb2e8f9f7 | 1049 | if (handle->txData) |
<> | 144:ef7eb2e8f9f7 | 1050 | { |
<> | 144:ef7eb2e8f9f7 | 1051 | wordToSend = *(handle->txData); |
<> | 144:ef7eb2e8f9f7 | 1052 | ++handle->txData; |
<> | 144:ef7eb2e8f9f7 | 1053 | } |
<> | 144:ef7eb2e8f9f7 | 1054 | else |
<> | 144:ef7eb2e8f9f7 | 1055 | { |
<> | 144:ef7eb2e8f9f7 | 1056 | wordToSend = dummyData; |
<> | 144:ef7eb2e8f9f7 | 1057 | } |
<> | 144:ef7eb2e8f9f7 | 1058 | |
<> | 144:ef7eb2e8f9f7 | 1059 | if (handle->remainingSendByteCount == 1) |
<> | 144:ef7eb2e8f9f7 | 1060 | { |
<> | 144:ef7eb2e8f9f7 | 1061 | base->PUSHR = handle->lastCommand | wordToSend; |
<> | 144:ef7eb2e8f9f7 | 1062 | } |
<> | 144:ef7eb2e8f9f7 | 1063 | else |
<> | 144:ef7eb2e8f9f7 | 1064 | { |
<> | 144:ef7eb2e8f9f7 | 1065 | base->PUSHR = handle->command | wordToSend; |
<> | 144:ef7eb2e8f9f7 | 1066 | } |
<> | 144:ef7eb2e8f9f7 | 1067 | |
<> | 144:ef7eb2e8f9f7 | 1068 | /* Try to clear the TFFF; if the TX FIFO is full this will clear */ |
<> | 144:ef7eb2e8f9f7 | 1069 | DSPI_ClearStatusFlags(base, kDSPI_TxFifoFillRequestFlag); |
<> | 144:ef7eb2e8f9f7 | 1070 | |
<> | 144:ef7eb2e8f9f7 | 1071 | --handle->remainingSendByteCount; |
<> | 144:ef7eb2e8f9f7 | 1072 | |
<> | 144:ef7eb2e8f9f7 | 1073 | /* exit loop if send count is zero, else update local variables for next loop */ |
<> | 144:ef7eb2e8f9f7 | 1074 | if (handle->remainingSendByteCount == 0) |
<> | 144:ef7eb2e8f9f7 | 1075 | { |
<> | 144:ef7eb2e8f9f7 | 1076 | break; |
<> | 144:ef7eb2e8f9f7 | 1077 | } |
<> | 144:ef7eb2e8f9f7 | 1078 | } |
<> | 144:ef7eb2e8f9f7 | 1079 | } |
<> | 144:ef7eb2e8f9f7 | 1080 | } |
<> | 144:ef7eb2e8f9f7 | 1081 | |
<> | 144:ef7eb2e8f9f7 | 1082 | void DSPI_MasterTransferAbort(SPI_Type *base, dspi_master_handle_t *handle) |
<> | 144:ef7eb2e8f9f7 | 1083 | { |
<> | 144:ef7eb2e8f9f7 | 1084 | DSPI_StopTransfer(base); |
<> | 144:ef7eb2e8f9f7 | 1085 | |
<> | 144:ef7eb2e8f9f7 | 1086 | /* Disable interrupt requests*/ |
<> | 144:ef7eb2e8f9f7 | 1087 | DSPI_DisableInterrupts(base, kDSPI_RxFifoDrainRequestInterruptEnable | kDSPI_TxFifoFillRequestInterruptEnable); |
<> | 144:ef7eb2e8f9f7 | 1088 | |
<> | 144:ef7eb2e8f9f7 | 1089 | handle->state = kDSPI_Idle; |
<> | 144:ef7eb2e8f9f7 | 1090 | } |
<> | 144:ef7eb2e8f9f7 | 1091 | |
<> | 144:ef7eb2e8f9f7 | 1092 | void DSPI_MasterTransferHandleIRQ(SPI_Type *base, dspi_master_handle_t *handle) |
<> | 144:ef7eb2e8f9f7 | 1093 | { |
<> | 144:ef7eb2e8f9f7 | 1094 | /* RECEIVE IRQ handler: Check read buffer only if there are remaining bytes to read. */ |
<> | 144:ef7eb2e8f9f7 | 1095 | if (handle->remainingReceiveByteCount) |
<> | 144:ef7eb2e8f9f7 | 1096 | { |
<> | 144:ef7eb2e8f9f7 | 1097 | /* Check read buffer.*/ |
<> | 144:ef7eb2e8f9f7 | 1098 | uint16_t wordReceived; /* Maximum supported data bit length in master mode is 16-bits */ |
<> | 144:ef7eb2e8f9f7 | 1099 | |
<> | 144:ef7eb2e8f9f7 | 1100 | /* If bits/frame is greater than one byte */ |
<> | 144:ef7eb2e8f9f7 | 1101 | if (handle->bitsPerFrame > 8) |
<> | 144:ef7eb2e8f9f7 | 1102 | { |
<> | 144:ef7eb2e8f9f7 | 1103 | while (DSPI_GetStatusFlags(base) & kDSPI_RxFifoDrainRequestFlag) |
<> | 144:ef7eb2e8f9f7 | 1104 | { |
<> | 144:ef7eb2e8f9f7 | 1105 | wordReceived = DSPI_ReadData(base); |
<> | 144:ef7eb2e8f9f7 | 1106 | /* clear the rx fifo drain request, needed for non-DMA applications as this flag |
<> | 144:ef7eb2e8f9f7 | 1107 | * will remain set even if the rx fifo is empty. By manually clearing this flag, it |
<> | 144:ef7eb2e8f9f7 | 1108 | * either remain clear if no more data is in the fifo, or it will set if there is |
<> | 144:ef7eb2e8f9f7 | 1109 | * more data in the fifo. |
<> | 144:ef7eb2e8f9f7 | 1110 | */ |
<> | 144:ef7eb2e8f9f7 | 1111 | DSPI_ClearStatusFlags(base, kDSPI_RxFifoDrainRequestFlag); |
<> | 144:ef7eb2e8f9f7 | 1112 | |
<> | 144:ef7eb2e8f9f7 | 1113 | /* Store read bytes into rx buffer only if a buffer pointer was provided */ |
<> | 144:ef7eb2e8f9f7 | 1114 | if (handle->rxData) |
<> | 144:ef7eb2e8f9f7 | 1115 | { |
<> | 144:ef7eb2e8f9f7 | 1116 | /* For the last word received, if there is an extra byte due to the odd transfer |
<> | 144:ef7eb2e8f9f7 | 1117 | * byte count, only save the the last byte and discard the upper byte |
<> | 144:ef7eb2e8f9f7 | 1118 | */ |
<> | 144:ef7eb2e8f9f7 | 1119 | if (handle->remainingReceiveByteCount == 1) |
<> | 144:ef7eb2e8f9f7 | 1120 | { |
<> | 144:ef7eb2e8f9f7 | 1121 | *handle->rxData = wordReceived; /* Write first data byte */ |
<> | 144:ef7eb2e8f9f7 | 1122 | --handle->remainingReceiveByteCount; |
<> | 144:ef7eb2e8f9f7 | 1123 | } |
<> | 144:ef7eb2e8f9f7 | 1124 | else |
<> | 144:ef7eb2e8f9f7 | 1125 | { |
<> | 144:ef7eb2e8f9f7 | 1126 | *handle->rxData = wordReceived; /* Write first data byte */ |
<> | 144:ef7eb2e8f9f7 | 1127 | ++handle->rxData; /* increment to next data byte */ |
<> | 144:ef7eb2e8f9f7 | 1128 | *handle->rxData = wordReceived >> 8; /* Write second data byte */ |
<> | 144:ef7eb2e8f9f7 | 1129 | ++handle->rxData; /* increment to next data byte */ |
<> | 144:ef7eb2e8f9f7 | 1130 | handle->remainingReceiveByteCount -= 2; |
<> | 144:ef7eb2e8f9f7 | 1131 | } |
<> | 144:ef7eb2e8f9f7 | 1132 | } |
<> | 144:ef7eb2e8f9f7 | 1133 | else |
<> | 144:ef7eb2e8f9f7 | 1134 | { |
<> | 144:ef7eb2e8f9f7 | 1135 | if (handle->remainingReceiveByteCount == 1) |
<> | 144:ef7eb2e8f9f7 | 1136 | { |
<> | 144:ef7eb2e8f9f7 | 1137 | --handle->remainingReceiveByteCount; |
<> | 144:ef7eb2e8f9f7 | 1138 | } |
<> | 144:ef7eb2e8f9f7 | 1139 | else |
<> | 144:ef7eb2e8f9f7 | 1140 | { |
<> | 144:ef7eb2e8f9f7 | 1141 | handle->remainingReceiveByteCount -= 2; |
<> | 144:ef7eb2e8f9f7 | 1142 | } |
<> | 144:ef7eb2e8f9f7 | 1143 | } |
<> | 144:ef7eb2e8f9f7 | 1144 | if (handle->remainingReceiveByteCount == 0) |
<> | 144:ef7eb2e8f9f7 | 1145 | { |
<> | 144:ef7eb2e8f9f7 | 1146 | break; |
<> | 144:ef7eb2e8f9f7 | 1147 | } |
<> | 144:ef7eb2e8f9f7 | 1148 | } /* End of RX FIFO drain while loop */ |
<> | 144:ef7eb2e8f9f7 | 1149 | } |
<> | 144:ef7eb2e8f9f7 | 1150 | /* Optimized for bits/frame less than or equal to one byte. */ |
<> | 144:ef7eb2e8f9f7 | 1151 | else |
<> | 144:ef7eb2e8f9f7 | 1152 | { |
<> | 144:ef7eb2e8f9f7 | 1153 | while (DSPI_GetStatusFlags(base) & kDSPI_RxFifoDrainRequestFlag) |
<> | 144:ef7eb2e8f9f7 | 1154 | { |
<> | 144:ef7eb2e8f9f7 | 1155 | wordReceived = DSPI_ReadData(base); |
<> | 144:ef7eb2e8f9f7 | 1156 | /* clear the rx fifo drain request, needed for non-DMA applications as this flag |
<> | 144:ef7eb2e8f9f7 | 1157 | * will remain set even if the rx fifo is empty. By manually clearing this flag, it |
<> | 144:ef7eb2e8f9f7 | 1158 | * either remain clear if no more data is in the fifo, or it will set if there is |
<> | 144:ef7eb2e8f9f7 | 1159 | * more data in the fifo. |
<> | 144:ef7eb2e8f9f7 | 1160 | */ |
<> | 144:ef7eb2e8f9f7 | 1161 | DSPI_ClearStatusFlags(base, kDSPI_RxFifoDrainRequestFlag); |
<> | 144:ef7eb2e8f9f7 | 1162 | |
<> | 144:ef7eb2e8f9f7 | 1163 | /* Store read bytes into rx buffer only if a buffer pointer was provided */ |
<> | 144:ef7eb2e8f9f7 | 1164 | if (handle->rxData) |
<> | 144:ef7eb2e8f9f7 | 1165 | { |
<> | 144:ef7eb2e8f9f7 | 1166 | *handle->rxData = wordReceived; |
<> | 144:ef7eb2e8f9f7 | 1167 | ++handle->rxData; |
<> | 144:ef7eb2e8f9f7 | 1168 | } |
<> | 144:ef7eb2e8f9f7 | 1169 | |
<> | 144:ef7eb2e8f9f7 | 1170 | --handle->remainingReceiveByteCount; |
<> | 144:ef7eb2e8f9f7 | 1171 | |
<> | 144:ef7eb2e8f9f7 | 1172 | if (handle->remainingReceiveByteCount == 0) |
<> | 144:ef7eb2e8f9f7 | 1173 | { |
<> | 144:ef7eb2e8f9f7 | 1174 | break; |
<> | 144:ef7eb2e8f9f7 | 1175 | } |
<> | 144:ef7eb2e8f9f7 | 1176 | } /* End of RX FIFO drain while loop */ |
<> | 144:ef7eb2e8f9f7 | 1177 | } |
<> | 144:ef7eb2e8f9f7 | 1178 | } |
<> | 144:ef7eb2e8f9f7 | 1179 | |
<> | 144:ef7eb2e8f9f7 | 1180 | /* Check write buffer. We always have to send a word in order to keep the transfer |
<> | 144:ef7eb2e8f9f7 | 1181 | * moving. So if the caller didn't provide a send buffer, we just send a zero. |
<> | 144:ef7eb2e8f9f7 | 1182 | */ |
<> | 144:ef7eb2e8f9f7 | 1183 | if (handle->remainingSendByteCount) |
<> | 144:ef7eb2e8f9f7 | 1184 | { |
<> | 144:ef7eb2e8f9f7 | 1185 | DSPI_MasterTransferFillUpTxFifo(base, handle); |
<> | 144:ef7eb2e8f9f7 | 1186 | } |
<> | 144:ef7eb2e8f9f7 | 1187 | |
<> | 144:ef7eb2e8f9f7 | 1188 | /* Check if we're done with this transfer.*/ |
<> | 144:ef7eb2e8f9f7 | 1189 | if ((handle->remainingSendByteCount == 0) && (handle->remainingReceiveByteCount == 0)) |
<> | 144:ef7eb2e8f9f7 | 1190 | { |
<> | 144:ef7eb2e8f9f7 | 1191 | /* Complete the transfer and disable the interrupts */ |
<> | 144:ef7eb2e8f9f7 | 1192 | DSPI_MasterTransferComplete(base, handle); |
<> | 144:ef7eb2e8f9f7 | 1193 | } |
<> | 144:ef7eb2e8f9f7 | 1194 | } |
<> | 144:ef7eb2e8f9f7 | 1195 | |
<> | 144:ef7eb2e8f9f7 | 1196 | /*Transactional APIs -- Slave*/ |
<> | 144:ef7eb2e8f9f7 | 1197 | void DSPI_SlaveTransferCreateHandle(SPI_Type *base, |
<> | 144:ef7eb2e8f9f7 | 1198 | dspi_slave_handle_t *handle, |
<> | 144:ef7eb2e8f9f7 | 1199 | dspi_slave_transfer_callback_t callback, |
<> | 144:ef7eb2e8f9f7 | 1200 | void *userData) |
<> | 144:ef7eb2e8f9f7 | 1201 | { |
<> | 144:ef7eb2e8f9f7 | 1202 | assert(handle); |
<> | 144:ef7eb2e8f9f7 | 1203 | |
<> | 144:ef7eb2e8f9f7 | 1204 | /* Zero the handle. */ |
<> | 144:ef7eb2e8f9f7 | 1205 | memset(handle, 0, sizeof(*handle)); |
<> | 144:ef7eb2e8f9f7 | 1206 | |
<> | 144:ef7eb2e8f9f7 | 1207 | g_dspiHandle[DSPI_GetInstance(base)] = handle; |
<> | 144:ef7eb2e8f9f7 | 1208 | |
<> | 144:ef7eb2e8f9f7 | 1209 | handle->callback = callback; |
<> | 144:ef7eb2e8f9f7 | 1210 | handle->userData = userData; |
<> | 144:ef7eb2e8f9f7 | 1211 | } |
<> | 144:ef7eb2e8f9f7 | 1212 | |
<> | 144:ef7eb2e8f9f7 | 1213 | status_t DSPI_SlaveTransferNonBlocking(SPI_Type *base, dspi_slave_handle_t *handle, dspi_transfer_t *transfer) |
<> | 144:ef7eb2e8f9f7 | 1214 | { |
<> | 144:ef7eb2e8f9f7 | 1215 | assert(handle && transfer); |
<> | 144:ef7eb2e8f9f7 | 1216 | |
<> | 144:ef7eb2e8f9f7 | 1217 | /* If receive length is zero */ |
<> | 144:ef7eb2e8f9f7 | 1218 | if (transfer->dataSize == 0) |
<> | 144:ef7eb2e8f9f7 | 1219 | { |
<> | 144:ef7eb2e8f9f7 | 1220 | return kStatus_InvalidArgument; |
<> | 144:ef7eb2e8f9f7 | 1221 | } |
<> | 144:ef7eb2e8f9f7 | 1222 | |
<> | 144:ef7eb2e8f9f7 | 1223 | /* If both send buffer and receive buffer is null */ |
<> | 144:ef7eb2e8f9f7 | 1224 | if ((!(transfer->txData)) && (!(transfer->rxData))) |
<> | 144:ef7eb2e8f9f7 | 1225 | { |
<> | 144:ef7eb2e8f9f7 | 1226 | return kStatus_InvalidArgument; |
<> | 144:ef7eb2e8f9f7 | 1227 | } |
<> | 144:ef7eb2e8f9f7 | 1228 | |
<> | 144:ef7eb2e8f9f7 | 1229 | /* Check that we're not busy.*/ |
<> | 144:ef7eb2e8f9f7 | 1230 | if (handle->state == kDSPI_Busy) |
<> | 144:ef7eb2e8f9f7 | 1231 | { |
<> | 144:ef7eb2e8f9f7 | 1232 | return kStatus_DSPI_Busy; |
<> | 144:ef7eb2e8f9f7 | 1233 | } |
<> | 144:ef7eb2e8f9f7 | 1234 | handle->state = kDSPI_Busy; |
<> | 144:ef7eb2e8f9f7 | 1235 | |
<> | 144:ef7eb2e8f9f7 | 1236 | /* Enable the NVIC for DSPI peripheral. */ |
<> | 144:ef7eb2e8f9f7 | 1237 | EnableIRQ(s_dspiIRQ[DSPI_GetInstance(base)]); |
<> | 144:ef7eb2e8f9f7 | 1238 | |
<> | 144:ef7eb2e8f9f7 | 1239 | /* Store transfer information */ |
<> | 144:ef7eb2e8f9f7 | 1240 | handle->txData = transfer->txData; |
<> | 144:ef7eb2e8f9f7 | 1241 | handle->rxData = transfer->rxData; |
<> | 144:ef7eb2e8f9f7 | 1242 | handle->remainingSendByteCount = transfer->dataSize; |
<> | 144:ef7eb2e8f9f7 | 1243 | handle->remainingReceiveByteCount = transfer->dataSize; |
<> | 144:ef7eb2e8f9f7 | 1244 | handle->totalByteCount = transfer->dataSize; |
<> | 144:ef7eb2e8f9f7 | 1245 | |
<> | 144:ef7eb2e8f9f7 | 1246 | handle->errorCount = 0; |
<> | 144:ef7eb2e8f9f7 | 1247 | |
<> | 144:ef7eb2e8f9f7 | 1248 | uint8_t whichCtar = (transfer->configFlags & DSPI_SLAVE_CTAR_MASK) >> DSPI_SLAVE_CTAR_SHIFT; |
<> | 144:ef7eb2e8f9f7 | 1249 | handle->bitsPerFrame = |
<> | 144:ef7eb2e8f9f7 | 1250 | (((base->CTAR_SLAVE[whichCtar]) & SPI_CTAR_SLAVE_FMSZ_MASK) >> SPI_CTAR_SLAVE_FMSZ_SHIFT) + 1; |
<> | 144:ef7eb2e8f9f7 | 1251 | |
<> | 144:ef7eb2e8f9f7 | 1252 | DSPI_StopTransfer(base); |
<> | 144:ef7eb2e8f9f7 | 1253 | |
<> | 144:ef7eb2e8f9f7 | 1254 | DSPI_FlushFifo(base, true, true); |
<> | 144:ef7eb2e8f9f7 | 1255 | DSPI_ClearStatusFlags(base, kDSPI_AllStatusFlag); |
<> | 144:ef7eb2e8f9f7 | 1256 | |
<> | 144:ef7eb2e8f9f7 | 1257 | DSPI_StartTransfer(base); |
<> | 144:ef7eb2e8f9f7 | 1258 | |
<> | 144:ef7eb2e8f9f7 | 1259 | /* Prepare data to transmit */ |
<> | 144:ef7eb2e8f9f7 | 1260 | DSPI_SlaveTransferFillUpTxFifo(base, handle); |
<> | 144:ef7eb2e8f9f7 | 1261 | |
<> | 144:ef7eb2e8f9f7 | 1262 | s_dspiSlaveIsr = DSPI_SlaveTransferHandleIRQ; |
<> | 144:ef7eb2e8f9f7 | 1263 | |
<> | 144:ef7eb2e8f9f7 | 1264 | /* Enable RX FIFO drain request, the slave only use this interrupt */ |
<> | 144:ef7eb2e8f9f7 | 1265 | DSPI_EnableInterrupts(base, kDSPI_RxFifoDrainRequestInterruptEnable); |
<> | 144:ef7eb2e8f9f7 | 1266 | |
<> | 144:ef7eb2e8f9f7 | 1267 | if (handle->rxData) |
<> | 144:ef7eb2e8f9f7 | 1268 | { |
<> | 144:ef7eb2e8f9f7 | 1269 | /* RX FIFO overflow request enable */ |
<> | 144:ef7eb2e8f9f7 | 1270 | DSPI_EnableInterrupts(base, kDSPI_RxFifoOverflowInterruptEnable); |
<> | 144:ef7eb2e8f9f7 | 1271 | } |
<> | 144:ef7eb2e8f9f7 | 1272 | if (handle->txData) |
<> | 144:ef7eb2e8f9f7 | 1273 | { |
<> | 144:ef7eb2e8f9f7 | 1274 | /* TX FIFO underflow request enable */ |
<> | 144:ef7eb2e8f9f7 | 1275 | DSPI_EnableInterrupts(base, kDSPI_TxFifoUnderflowInterruptEnable); |
<> | 144:ef7eb2e8f9f7 | 1276 | } |
<> | 144:ef7eb2e8f9f7 | 1277 | |
<> | 144:ef7eb2e8f9f7 | 1278 | return kStatus_Success; |
<> | 144:ef7eb2e8f9f7 | 1279 | } |
<> | 144:ef7eb2e8f9f7 | 1280 | |
<> | 144:ef7eb2e8f9f7 | 1281 | status_t DSPI_SlaveTransferGetCount(SPI_Type *base, dspi_slave_handle_t *handle, size_t *count) |
<> | 144:ef7eb2e8f9f7 | 1282 | { |
<> | 144:ef7eb2e8f9f7 | 1283 | assert(handle); |
<> | 144:ef7eb2e8f9f7 | 1284 | |
<> | 144:ef7eb2e8f9f7 | 1285 | if (!count) |
<> | 144:ef7eb2e8f9f7 | 1286 | { |
<> | 144:ef7eb2e8f9f7 | 1287 | return kStatus_InvalidArgument; |
<> | 144:ef7eb2e8f9f7 | 1288 | } |
<> | 144:ef7eb2e8f9f7 | 1289 | |
<> | 144:ef7eb2e8f9f7 | 1290 | /* Catch when there is not an active transfer. */ |
<> | 144:ef7eb2e8f9f7 | 1291 | if (handle->state != kDSPI_Busy) |
<> | 144:ef7eb2e8f9f7 | 1292 | { |
<> | 144:ef7eb2e8f9f7 | 1293 | *count = 0; |
<> | 144:ef7eb2e8f9f7 | 1294 | return kStatus_NoTransferInProgress; |
<> | 144:ef7eb2e8f9f7 | 1295 | } |
<> | 144:ef7eb2e8f9f7 | 1296 | |
<> | 144:ef7eb2e8f9f7 | 1297 | *count = handle->totalByteCount - handle->remainingReceiveByteCount; |
<> | 144:ef7eb2e8f9f7 | 1298 | return kStatus_Success; |
<> | 144:ef7eb2e8f9f7 | 1299 | } |
<> | 144:ef7eb2e8f9f7 | 1300 | |
<> | 144:ef7eb2e8f9f7 | 1301 | static void DSPI_SlaveTransferFillUpTxFifo(SPI_Type *base, dspi_slave_handle_t *handle) |
<> | 144:ef7eb2e8f9f7 | 1302 | { |
<> | 144:ef7eb2e8f9f7 | 1303 | uint16_t transmitData = 0; |
<> | 144:ef7eb2e8f9f7 | 1304 | uint8_t dummyPattern = DSPI_SLAVE_DUMMY_DATA; |
<> | 144:ef7eb2e8f9f7 | 1305 | |
<> | 144:ef7eb2e8f9f7 | 1306 | /* Service the transmitter, if transmit buffer provided, transmit the data, |
<> | 144:ef7eb2e8f9f7 | 1307 | * else transmit dummy pattern |
<> | 144:ef7eb2e8f9f7 | 1308 | */ |
<> | 144:ef7eb2e8f9f7 | 1309 | while (DSPI_GetStatusFlags(base) & kDSPI_TxFifoFillRequestFlag) |
<> | 144:ef7eb2e8f9f7 | 1310 | { |
<> | 144:ef7eb2e8f9f7 | 1311 | /* Transmit data */ |
<> | 144:ef7eb2e8f9f7 | 1312 | if (handle->remainingSendByteCount > 0) |
<> | 144:ef7eb2e8f9f7 | 1313 | { |
<> | 144:ef7eb2e8f9f7 | 1314 | /* Have data to transmit, update the transmit data and push to FIFO */ |
<> | 144:ef7eb2e8f9f7 | 1315 | if (handle->bitsPerFrame <= 8) |
<> | 144:ef7eb2e8f9f7 | 1316 | { |
<> | 144:ef7eb2e8f9f7 | 1317 | /* bits/frame is 1 byte */ |
<> | 144:ef7eb2e8f9f7 | 1318 | if (handle->txData) |
<> | 144:ef7eb2e8f9f7 | 1319 | { |
<> | 144:ef7eb2e8f9f7 | 1320 | /* Update transmit data and transmit pointer */ |
<> | 144:ef7eb2e8f9f7 | 1321 | transmitData = *handle->txData; |
<> | 144:ef7eb2e8f9f7 | 1322 | handle->txData++; |
<> | 144:ef7eb2e8f9f7 | 1323 | } |
<> | 144:ef7eb2e8f9f7 | 1324 | else |
<> | 144:ef7eb2e8f9f7 | 1325 | { |
<> | 144:ef7eb2e8f9f7 | 1326 | transmitData = dummyPattern; |
<> | 144:ef7eb2e8f9f7 | 1327 | } |
<> | 144:ef7eb2e8f9f7 | 1328 | |
<> | 144:ef7eb2e8f9f7 | 1329 | /* Decrease remaining dataSize */ |
<> | 144:ef7eb2e8f9f7 | 1330 | --handle->remainingSendByteCount; |
<> | 144:ef7eb2e8f9f7 | 1331 | } |
<> | 144:ef7eb2e8f9f7 | 1332 | /* bits/frame is 2 bytes */ |
<> | 144:ef7eb2e8f9f7 | 1333 | else |
<> | 144:ef7eb2e8f9f7 | 1334 | { |
<> | 144:ef7eb2e8f9f7 | 1335 | /* With multibytes per frame transmission, the transmit frame contains data from |
<> | 144:ef7eb2e8f9f7 | 1336 | * transmit buffer until sent dataSize matches user request. Other bytes will set to |
<> | 144:ef7eb2e8f9f7 | 1337 | * dummy pattern value. |
<> | 144:ef7eb2e8f9f7 | 1338 | */ |
<> | 144:ef7eb2e8f9f7 | 1339 | if (handle->txData) |
<> | 144:ef7eb2e8f9f7 | 1340 | { |
<> | 144:ef7eb2e8f9f7 | 1341 | /* Update first byte of transmit data and transmit pointer */ |
<> | 144:ef7eb2e8f9f7 | 1342 | transmitData = *handle->txData; |
<> | 144:ef7eb2e8f9f7 | 1343 | handle->txData++; |
<> | 144:ef7eb2e8f9f7 | 1344 | |
<> | 144:ef7eb2e8f9f7 | 1345 | if (handle->remainingSendByteCount == 1) |
<> | 144:ef7eb2e8f9f7 | 1346 | { |
<> | 144:ef7eb2e8f9f7 | 1347 | /* Decrease remaining dataSize */ |
<> | 144:ef7eb2e8f9f7 | 1348 | --handle->remainingSendByteCount; |
<> | 144:ef7eb2e8f9f7 | 1349 | /* Update second byte of transmit data to second byte of dummy pattern */ |
<> | 144:ef7eb2e8f9f7 | 1350 | transmitData = transmitData | (uint16_t)(((uint16_t)dummyPattern) << 8); |
<> | 144:ef7eb2e8f9f7 | 1351 | } |
<> | 144:ef7eb2e8f9f7 | 1352 | else |
<> | 144:ef7eb2e8f9f7 | 1353 | { |
<> | 144:ef7eb2e8f9f7 | 1354 | /* Update second byte of transmit data and transmit pointer */ |
<> | 144:ef7eb2e8f9f7 | 1355 | transmitData = transmitData | (uint16_t)((uint16_t)(*handle->txData) << 8); |
<> | 144:ef7eb2e8f9f7 | 1356 | handle->txData++; |
<> | 144:ef7eb2e8f9f7 | 1357 | handle->remainingSendByteCount -= 2; |
<> | 144:ef7eb2e8f9f7 | 1358 | } |
<> | 144:ef7eb2e8f9f7 | 1359 | } |
<> | 144:ef7eb2e8f9f7 | 1360 | else |
<> | 144:ef7eb2e8f9f7 | 1361 | { |
<> | 144:ef7eb2e8f9f7 | 1362 | if (handle->remainingSendByteCount == 1) |
<> | 144:ef7eb2e8f9f7 | 1363 | { |
<> | 144:ef7eb2e8f9f7 | 1364 | --handle->remainingSendByteCount; |
<> | 144:ef7eb2e8f9f7 | 1365 | } |
<> | 144:ef7eb2e8f9f7 | 1366 | else |
<> | 144:ef7eb2e8f9f7 | 1367 | { |
<> | 144:ef7eb2e8f9f7 | 1368 | handle->remainingSendByteCount -= 2; |
<> | 144:ef7eb2e8f9f7 | 1369 | } |
<> | 144:ef7eb2e8f9f7 | 1370 | transmitData = (uint16_t)((uint16_t)(dummyPattern) << 8) | dummyPattern; |
<> | 144:ef7eb2e8f9f7 | 1371 | } |
<> | 144:ef7eb2e8f9f7 | 1372 | } |
<> | 144:ef7eb2e8f9f7 | 1373 | } |
<> | 144:ef7eb2e8f9f7 | 1374 | else |
<> | 144:ef7eb2e8f9f7 | 1375 | { |
<> | 144:ef7eb2e8f9f7 | 1376 | break; |
<> | 144:ef7eb2e8f9f7 | 1377 | } |
<> | 144:ef7eb2e8f9f7 | 1378 | |
<> | 144:ef7eb2e8f9f7 | 1379 | /* Write the data to the DSPI data register */ |
<> | 144:ef7eb2e8f9f7 | 1380 | base->PUSHR_SLAVE = transmitData; |
<> | 144:ef7eb2e8f9f7 | 1381 | |
<> | 144:ef7eb2e8f9f7 | 1382 | /* Try to clear TFFF by writing a one to it; it will not clear if TX FIFO not full */ |
<> | 144:ef7eb2e8f9f7 | 1383 | DSPI_ClearStatusFlags(base, kDSPI_TxFifoFillRequestFlag); |
<> | 144:ef7eb2e8f9f7 | 1384 | } |
<> | 144:ef7eb2e8f9f7 | 1385 | } |
<> | 144:ef7eb2e8f9f7 | 1386 | |
<> | 144:ef7eb2e8f9f7 | 1387 | static void DSPI_SlaveTransferComplete(SPI_Type *base, dspi_slave_handle_t *handle) |
<> | 144:ef7eb2e8f9f7 | 1388 | { |
<> | 144:ef7eb2e8f9f7 | 1389 | /* Disable interrupt requests */ |
<> | 144:ef7eb2e8f9f7 | 1390 | DSPI_DisableInterrupts(base, kDSPI_TxFifoUnderflowInterruptEnable | kDSPI_TxFifoFillRequestInterruptEnable | |
<> | 144:ef7eb2e8f9f7 | 1391 | kDSPI_RxFifoOverflowInterruptEnable | kDSPI_RxFifoDrainRequestInterruptEnable); |
<> | 144:ef7eb2e8f9f7 | 1392 | |
<> | 144:ef7eb2e8f9f7 | 1393 | /* The transfer is complete. */ |
<> | 144:ef7eb2e8f9f7 | 1394 | handle->txData = NULL; |
<> | 144:ef7eb2e8f9f7 | 1395 | handle->rxData = NULL; |
<> | 144:ef7eb2e8f9f7 | 1396 | handle->remainingReceiveByteCount = 0; |
<> | 144:ef7eb2e8f9f7 | 1397 | handle->remainingSendByteCount = 0; |
<> | 144:ef7eb2e8f9f7 | 1398 | |
<> | 144:ef7eb2e8f9f7 | 1399 | status_t status = 0; |
<> | 144:ef7eb2e8f9f7 | 1400 | if (handle->state == kDSPI_Error) |
<> | 144:ef7eb2e8f9f7 | 1401 | { |
<> | 144:ef7eb2e8f9f7 | 1402 | status = kStatus_DSPI_Error; |
<> | 144:ef7eb2e8f9f7 | 1403 | } |
<> | 144:ef7eb2e8f9f7 | 1404 | else |
<> | 144:ef7eb2e8f9f7 | 1405 | { |
<> | 144:ef7eb2e8f9f7 | 1406 | status = kStatus_Success; |
<> | 144:ef7eb2e8f9f7 | 1407 | } |
<> | 144:ef7eb2e8f9f7 | 1408 | |
<> | 144:ef7eb2e8f9f7 | 1409 | if (handle->callback) |
<> | 144:ef7eb2e8f9f7 | 1410 | { |
<> | 144:ef7eb2e8f9f7 | 1411 | handle->callback(base, handle, status, handle->userData); |
<> | 144:ef7eb2e8f9f7 | 1412 | } |
<> | 144:ef7eb2e8f9f7 | 1413 | |
<> | 144:ef7eb2e8f9f7 | 1414 | handle->state = kDSPI_Idle; |
<> | 144:ef7eb2e8f9f7 | 1415 | } |
<> | 144:ef7eb2e8f9f7 | 1416 | |
<> | 144:ef7eb2e8f9f7 | 1417 | void DSPI_SlaveTransferAbort(SPI_Type *base, dspi_slave_handle_t *handle) |
<> | 144:ef7eb2e8f9f7 | 1418 | { |
<> | 144:ef7eb2e8f9f7 | 1419 | DSPI_StopTransfer(base); |
<> | 144:ef7eb2e8f9f7 | 1420 | |
<> | 144:ef7eb2e8f9f7 | 1421 | /* Disable interrupt requests */ |
<> | 144:ef7eb2e8f9f7 | 1422 | DSPI_DisableInterrupts(base, kDSPI_TxFifoUnderflowInterruptEnable | kDSPI_TxFifoFillRequestInterruptEnable | |
<> | 144:ef7eb2e8f9f7 | 1423 | kDSPI_RxFifoOverflowInterruptEnable | kDSPI_RxFifoDrainRequestInterruptEnable); |
<> | 144:ef7eb2e8f9f7 | 1424 | |
<> | 144:ef7eb2e8f9f7 | 1425 | handle->state = kDSPI_Idle; |
<> | 144:ef7eb2e8f9f7 | 1426 | handle->remainingSendByteCount = 0; |
<> | 144:ef7eb2e8f9f7 | 1427 | handle->remainingReceiveByteCount = 0; |
<> | 144:ef7eb2e8f9f7 | 1428 | } |
<> | 144:ef7eb2e8f9f7 | 1429 | |
<> | 144:ef7eb2e8f9f7 | 1430 | void DSPI_SlaveTransferHandleIRQ(SPI_Type *base, dspi_slave_handle_t *handle) |
<> | 144:ef7eb2e8f9f7 | 1431 | { |
<> | 144:ef7eb2e8f9f7 | 1432 | uint8_t dummyPattern = DSPI_SLAVE_DUMMY_DATA; |
<> | 144:ef7eb2e8f9f7 | 1433 | uint32_t dataReceived; |
<> | 144:ef7eb2e8f9f7 | 1434 | uint32_t dataSend = 0; |
<> | 144:ef7eb2e8f9f7 | 1435 | |
<> | 144:ef7eb2e8f9f7 | 1436 | /* Because SPI protocol is synchronous, the number of bytes that that slave received from the |
<> | 144:ef7eb2e8f9f7 | 1437 | * master is the actual number of bytes that the slave transmitted to the master. So we only |
<> | 144:ef7eb2e8f9f7 | 1438 | * monitor the received dataSize to know when the transfer is complete. |
<> | 144:ef7eb2e8f9f7 | 1439 | */ |
<> | 144:ef7eb2e8f9f7 | 1440 | if (handle->remainingReceiveByteCount > 0) |
<> | 144:ef7eb2e8f9f7 | 1441 | { |
<> | 144:ef7eb2e8f9f7 | 1442 | while (DSPI_GetStatusFlags(base) & kDSPI_RxFifoDrainRequestFlag) |
<> | 144:ef7eb2e8f9f7 | 1443 | { |
<> | 144:ef7eb2e8f9f7 | 1444 | /* Have received data in the buffer. */ |
<> | 144:ef7eb2e8f9f7 | 1445 | dataReceived = base->POPR; |
<> | 144:ef7eb2e8f9f7 | 1446 | /*Clear the rx fifo drain request, needed for non-DMA applications as this flag |
<> | 144:ef7eb2e8f9f7 | 1447 | * will remain set even if the rx fifo is empty. By manually clearing this flag, it |
<> | 144:ef7eb2e8f9f7 | 1448 | * either remain clear if no more data is in the fifo, or it will set if there is |
<> | 144:ef7eb2e8f9f7 | 1449 | * more data in the fifo. |
<> | 144:ef7eb2e8f9f7 | 1450 | */ |
<> | 144:ef7eb2e8f9f7 | 1451 | DSPI_ClearStatusFlags(base, kDSPI_RxFifoDrainRequestFlag); |
<> | 144:ef7eb2e8f9f7 | 1452 | |
<> | 144:ef7eb2e8f9f7 | 1453 | /* If bits/frame is one byte */ |
<> | 144:ef7eb2e8f9f7 | 1454 | if (handle->bitsPerFrame <= 8) |
<> | 144:ef7eb2e8f9f7 | 1455 | { |
<> | 144:ef7eb2e8f9f7 | 1456 | if (handle->rxData) |
<> | 144:ef7eb2e8f9f7 | 1457 | { |
<> | 144:ef7eb2e8f9f7 | 1458 | /* Receive buffer is not null, store data into it */ |
<> | 144:ef7eb2e8f9f7 | 1459 | *handle->rxData = dataReceived; |
<> | 144:ef7eb2e8f9f7 | 1460 | ++handle->rxData; |
<> | 144:ef7eb2e8f9f7 | 1461 | } |
<> | 144:ef7eb2e8f9f7 | 1462 | /* Descrease remaining receive byte count */ |
<> | 144:ef7eb2e8f9f7 | 1463 | --handle->remainingReceiveByteCount; |
<> | 144:ef7eb2e8f9f7 | 1464 | |
<> | 144:ef7eb2e8f9f7 | 1465 | if (handle->remainingSendByteCount > 0) |
<> | 144:ef7eb2e8f9f7 | 1466 | { |
<> | 144:ef7eb2e8f9f7 | 1467 | if (handle->txData) |
<> | 144:ef7eb2e8f9f7 | 1468 | { |
<> | 144:ef7eb2e8f9f7 | 1469 | dataSend = *handle->txData; |
<> | 144:ef7eb2e8f9f7 | 1470 | ++handle->txData; |
<> | 144:ef7eb2e8f9f7 | 1471 | } |
<> | 144:ef7eb2e8f9f7 | 1472 | else |
<> | 144:ef7eb2e8f9f7 | 1473 | { |
<> | 144:ef7eb2e8f9f7 | 1474 | dataSend = dummyPattern; |
<> | 144:ef7eb2e8f9f7 | 1475 | } |
<> | 144:ef7eb2e8f9f7 | 1476 | |
<> | 144:ef7eb2e8f9f7 | 1477 | --handle->remainingSendByteCount; |
<> | 144:ef7eb2e8f9f7 | 1478 | /* Write the data to the DSPI data register */ |
<> | 144:ef7eb2e8f9f7 | 1479 | base->PUSHR_SLAVE = dataSend; |
<> | 144:ef7eb2e8f9f7 | 1480 | } |
<> | 144:ef7eb2e8f9f7 | 1481 | } |
<> | 144:ef7eb2e8f9f7 | 1482 | else /* If bits/frame is 2 bytes */ |
<> | 144:ef7eb2e8f9f7 | 1483 | { |
<> | 144:ef7eb2e8f9f7 | 1484 | /* With multibytes frame receiving, we only receive till the received dataSize |
<> | 144:ef7eb2e8f9f7 | 1485 | * matches user request. Other bytes will be ignored. |
<> | 144:ef7eb2e8f9f7 | 1486 | */ |
<> | 144:ef7eb2e8f9f7 | 1487 | if (handle->rxData) |
<> | 144:ef7eb2e8f9f7 | 1488 | { |
<> | 144:ef7eb2e8f9f7 | 1489 | /* Receive buffer is not null, store first byte into it */ |
<> | 144:ef7eb2e8f9f7 | 1490 | *handle->rxData = dataReceived; |
<> | 144:ef7eb2e8f9f7 | 1491 | ++handle->rxData; |
<> | 144:ef7eb2e8f9f7 | 1492 | |
<> | 144:ef7eb2e8f9f7 | 1493 | if (handle->remainingReceiveByteCount == 1) |
<> | 144:ef7eb2e8f9f7 | 1494 | { |
<> | 144:ef7eb2e8f9f7 | 1495 | /* Decrease remaining receive byte count */ |
<> | 144:ef7eb2e8f9f7 | 1496 | --handle->remainingReceiveByteCount; |
<> | 144:ef7eb2e8f9f7 | 1497 | } |
<> | 144:ef7eb2e8f9f7 | 1498 | else |
<> | 144:ef7eb2e8f9f7 | 1499 | { |
<> | 144:ef7eb2e8f9f7 | 1500 | /* Receive buffer is not null, store second byte into it */ |
<> | 144:ef7eb2e8f9f7 | 1501 | *handle->rxData = dataReceived >> 8; |
<> | 144:ef7eb2e8f9f7 | 1502 | ++handle->rxData; |
<> | 144:ef7eb2e8f9f7 | 1503 | handle->remainingReceiveByteCount -= 2; |
<> | 144:ef7eb2e8f9f7 | 1504 | } |
<> | 144:ef7eb2e8f9f7 | 1505 | } |
<> | 144:ef7eb2e8f9f7 | 1506 | /* If no handle->rxData*/ |
<> | 144:ef7eb2e8f9f7 | 1507 | else |
<> | 144:ef7eb2e8f9f7 | 1508 | { |
<> | 144:ef7eb2e8f9f7 | 1509 | if (handle->remainingReceiveByteCount == 1) |
<> | 144:ef7eb2e8f9f7 | 1510 | { |
<> | 144:ef7eb2e8f9f7 | 1511 | /* Decrease remaining receive byte count */ |
<> | 144:ef7eb2e8f9f7 | 1512 | --handle->remainingReceiveByteCount; |
<> | 144:ef7eb2e8f9f7 | 1513 | } |
<> | 144:ef7eb2e8f9f7 | 1514 | else |
<> | 144:ef7eb2e8f9f7 | 1515 | { |
<> | 144:ef7eb2e8f9f7 | 1516 | handle->remainingReceiveByteCount -= 2; |
<> | 144:ef7eb2e8f9f7 | 1517 | } |
<> | 144:ef7eb2e8f9f7 | 1518 | } |
<> | 144:ef7eb2e8f9f7 | 1519 | |
<> | 144:ef7eb2e8f9f7 | 1520 | if (handle->remainingSendByteCount > 0) |
<> | 144:ef7eb2e8f9f7 | 1521 | { |
<> | 144:ef7eb2e8f9f7 | 1522 | if (handle->txData) |
<> | 144:ef7eb2e8f9f7 | 1523 | { |
<> | 144:ef7eb2e8f9f7 | 1524 | dataSend = *handle->txData; |
<> | 144:ef7eb2e8f9f7 | 1525 | ++handle->txData; |
<> | 144:ef7eb2e8f9f7 | 1526 | |
<> | 144:ef7eb2e8f9f7 | 1527 | if (handle->remainingSendByteCount == 1) |
<> | 144:ef7eb2e8f9f7 | 1528 | { |
<> | 144:ef7eb2e8f9f7 | 1529 | --handle->remainingSendByteCount; |
<> | 144:ef7eb2e8f9f7 | 1530 | dataSend |= (uint16_t)((uint16_t)(dummyPattern) << 8); |
<> | 144:ef7eb2e8f9f7 | 1531 | } |
<> | 144:ef7eb2e8f9f7 | 1532 | else |
<> | 144:ef7eb2e8f9f7 | 1533 | { |
<> | 144:ef7eb2e8f9f7 | 1534 | dataSend |= (uint32_t)(*handle->txData) << 8; |
<> | 144:ef7eb2e8f9f7 | 1535 | ++handle->txData; |
<> | 144:ef7eb2e8f9f7 | 1536 | handle->remainingSendByteCount -= 2; |
<> | 144:ef7eb2e8f9f7 | 1537 | } |
<> | 144:ef7eb2e8f9f7 | 1538 | } |
<> | 144:ef7eb2e8f9f7 | 1539 | /* If no handle->txData*/ |
<> | 144:ef7eb2e8f9f7 | 1540 | else |
<> | 144:ef7eb2e8f9f7 | 1541 | { |
<> | 144:ef7eb2e8f9f7 | 1542 | if (handle->remainingSendByteCount == 1) |
<> | 144:ef7eb2e8f9f7 | 1543 | { |
<> | 144:ef7eb2e8f9f7 | 1544 | --handle->remainingSendByteCount; |
<> | 144:ef7eb2e8f9f7 | 1545 | } |
<> | 144:ef7eb2e8f9f7 | 1546 | else |
<> | 144:ef7eb2e8f9f7 | 1547 | { |
<> | 144:ef7eb2e8f9f7 | 1548 | handle->remainingSendByteCount -= 2; |
<> | 144:ef7eb2e8f9f7 | 1549 | } |
<> | 144:ef7eb2e8f9f7 | 1550 | dataSend = (uint16_t)((uint16_t)(dummyPattern) << 8) | dummyPattern; |
<> | 144:ef7eb2e8f9f7 | 1551 | } |
<> | 144:ef7eb2e8f9f7 | 1552 | /* Write the data to the DSPI data register */ |
<> | 144:ef7eb2e8f9f7 | 1553 | base->PUSHR_SLAVE = dataSend; |
<> | 144:ef7eb2e8f9f7 | 1554 | } |
<> | 144:ef7eb2e8f9f7 | 1555 | } |
<> | 144:ef7eb2e8f9f7 | 1556 | /* Try to clear TFFF by writing a one to it; it will not clear if TX FIFO not full */ |
<> | 144:ef7eb2e8f9f7 | 1557 | DSPI_ClearStatusFlags(base, kDSPI_TxFifoFillRequestFlag); |
<> | 144:ef7eb2e8f9f7 | 1558 | |
<> | 144:ef7eb2e8f9f7 | 1559 | if (handle->remainingReceiveByteCount == 0) |
<> | 144:ef7eb2e8f9f7 | 1560 | { |
<> | 144:ef7eb2e8f9f7 | 1561 | break; |
<> | 144:ef7eb2e8f9f7 | 1562 | } |
<> | 144:ef7eb2e8f9f7 | 1563 | } |
<> | 144:ef7eb2e8f9f7 | 1564 | } |
<> | 144:ef7eb2e8f9f7 | 1565 | /* Check if remaining receive byte count matches user request */ |
<> | 144:ef7eb2e8f9f7 | 1566 | if ((handle->remainingReceiveByteCount == 0) || (handle->state == kDSPI_Error)) |
<> | 144:ef7eb2e8f9f7 | 1567 | { |
<> | 144:ef7eb2e8f9f7 | 1568 | /* Other cases, stop the transfer. */ |
<> | 144:ef7eb2e8f9f7 | 1569 | DSPI_SlaveTransferComplete(base, handle); |
<> | 144:ef7eb2e8f9f7 | 1570 | return; |
<> | 144:ef7eb2e8f9f7 | 1571 | } |
<> | 144:ef7eb2e8f9f7 | 1572 | |
<> | 144:ef7eb2e8f9f7 | 1573 | /* Catch tx fifo underflow conditions, service only if tx under flow interrupt enabled */ |
<> | 144:ef7eb2e8f9f7 | 1574 | if ((DSPI_GetStatusFlags(base) & kDSPI_TxFifoUnderflowFlag) && (base->RSER & SPI_RSER_TFUF_RE_MASK)) |
<> | 144:ef7eb2e8f9f7 | 1575 | { |
<> | 144:ef7eb2e8f9f7 | 1576 | DSPI_ClearStatusFlags(base, kDSPI_TxFifoUnderflowFlag); |
<> | 144:ef7eb2e8f9f7 | 1577 | /* Change state to error and clear flag */ |
<> | 144:ef7eb2e8f9f7 | 1578 | if (handle->txData) |
<> | 144:ef7eb2e8f9f7 | 1579 | { |
<> | 144:ef7eb2e8f9f7 | 1580 | handle->state = kDSPI_Error; |
<> | 144:ef7eb2e8f9f7 | 1581 | } |
<> | 144:ef7eb2e8f9f7 | 1582 | handle->errorCount++; |
<> | 144:ef7eb2e8f9f7 | 1583 | } |
<> | 144:ef7eb2e8f9f7 | 1584 | /* Catch rx fifo overflow conditions, service only if rx over flow interrupt enabled */ |
<> | 144:ef7eb2e8f9f7 | 1585 | if ((DSPI_GetStatusFlags(base) & kDSPI_RxFifoOverflowFlag) && (base->RSER & SPI_RSER_RFOF_RE_MASK)) |
<> | 144:ef7eb2e8f9f7 | 1586 | { |
<> | 144:ef7eb2e8f9f7 | 1587 | DSPI_ClearStatusFlags(base, kDSPI_RxFifoOverflowFlag); |
<> | 144:ef7eb2e8f9f7 | 1588 | /* Change state to error and clear flag */ |
<> | 144:ef7eb2e8f9f7 | 1589 | if (handle->txData) |
<> | 144:ef7eb2e8f9f7 | 1590 | { |
<> | 144:ef7eb2e8f9f7 | 1591 | handle->state = kDSPI_Error; |
<> | 144:ef7eb2e8f9f7 | 1592 | } |
<> | 144:ef7eb2e8f9f7 | 1593 | handle->errorCount++; |
<> | 144:ef7eb2e8f9f7 | 1594 | } |
<> | 144:ef7eb2e8f9f7 | 1595 | } |
<> | 144:ef7eb2e8f9f7 | 1596 | |
<> | 144:ef7eb2e8f9f7 | 1597 | static void DSPI_CommonIRQHandler(SPI_Type *base, void *param) |
<> | 144:ef7eb2e8f9f7 | 1598 | { |
<> | 144:ef7eb2e8f9f7 | 1599 | if (DSPI_IsMaster(base)) |
<> | 144:ef7eb2e8f9f7 | 1600 | { |
<> | 144:ef7eb2e8f9f7 | 1601 | s_dspiMasterIsr(base, (dspi_master_handle_t *)param); |
<> | 144:ef7eb2e8f9f7 | 1602 | } |
<> | 144:ef7eb2e8f9f7 | 1603 | else |
<> | 144:ef7eb2e8f9f7 | 1604 | { |
<> | 144:ef7eb2e8f9f7 | 1605 | s_dspiSlaveIsr(base, (dspi_slave_handle_t *)param); |
<> | 144:ef7eb2e8f9f7 | 1606 | } |
<> | 144:ef7eb2e8f9f7 | 1607 | } |
<> | 144:ef7eb2e8f9f7 | 1608 | |
<> | 144:ef7eb2e8f9f7 | 1609 | #if defined(SPI0) |
<> | 144:ef7eb2e8f9f7 | 1610 | void SPI0_DriverIRQHandler(void) |
<> | 144:ef7eb2e8f9f7 | 1611 | { |
<> | 144:ef7eb2e8f9f7 | 1612 | assert(g_dspiHandle[0]); |
<> | 144:ef7eb2e8f9f7 | 1613 | DSPI_CommonIRQHandler(SPI0, g_dspiHandle[0]); |
<> | 144:ef7eb2e8f9f7 | 1614 | } |
<> | 144:ef7eb2e8f9f7 | 1615 | #endif |
<> | 144:ef7eb2e8f9f7 | 1616 | |
<> | 144:ef7eb2e8f9f7 | 1617 | #if defined(SPI1) |
<> | 144:ef7eb2e8f9f7 | 1618 | void SPI1_DriverIRQHandler(void) |
<> | 144:ef7eb2e8f9f7 | 1619 | { |
<> | 144:ef7eb2e8f9f7 | 1620 | assert(g_dspiHandle[1]); |
<> | 144:ef7eb2e8f9f7 | 1621 | DSPI_CommonIRQHandler(SPI1, g_dspiHandle[1]); |
<> | 144:ef7eb2e8f9f7 | 1622 | } |
<> | 144:ef7eb2e8f9f7 | 1623 | #endif |
<> | 144:ef7eb2e8f9f7 | 1624 | |
<> | 144:ef7eb2e8f9f7 | 1625 | #if defined(SPI2) |
<> | 144:ef7eb2e8f9f7 | 1626 | void SPI2_DriverIRQHandler(void) |
<> | 144:ef7eb2e8f9f7 | 1627 | { |
<> | 144:ef7eb2e8f9f7 | 1628 | assert(g_dspiHandle[2]); |
<> | 144:ef7eb2e8f9f7 | 1629 | DSPI_CommonIRQHandler(SPI2, g_dspiHandle[2]); |
<> | 144:ef7eb2e8f9f7 | 1630 | } |
<> | 144:ef7eb2e8f9f7 | 1631 | #endif |
<> | 144:ef7eb2e8f9f7 | 1632 | |
<> | 144:ef7eb2e8f9f7 | 1633 | #if defined(SPI3) |
<> | 144:ef7eb2e8f9f7 | 1634 | void SPI3_DriverIRQHandler(void) |
<> | 144:ef7eb2e8f9f7 | 1635 | { |
<> | 144:ef7eb2e8f9f7 | 1636 | assert(g_dspiHandle[3]); |
<> | 144:ef7eb2e8f9f7 | 1637 | DSPI_CommonIRQHandler(SPI3, g_dspiHandle[3]); |
<> | 144:ef7eb2e8f9f7 | 1638 | } |
<> | 144:ef7eb2e8f9f7 | 1639 | #endif |
<> | 144:ef7eb2e8f9f7 | 1640 | |
<> | 144:ef7eb2e8f9f7 | 1641 | #if defined(SPI4) |
<> | 144:ef7eb2e8f9f7 | 1642 | void SPI4_DriverIRQHandler(void) |
<> | 144:ef7eb2e8f9f7 | 1643 | { |
<> | 144:ef7eb2e8f9f7 | 1644 | assert(g_dspiHandle[4]); |
<> | 144:ef7eb2e8f9f7 | 1645 | DSPI_CommonIRQHandler(SPI4, g_dspiHandle[4]); |
<> | 144:ef7eb2e8f9f7 | 1646 | } |
<> | 144:ef7eb2e8f9f7 | 1647 | #endif |
<> | 144:ef7eb2e8f9f7 | 1648 | |
<> | 144:ef7eb2e8f9f7 | 1649 | #if defined(SPI5) |
<> | 144:ef7eb2e8f9f7 | 1650 | void SPI5_DriverIRQHandler(void) |
<> | 144:ef7eb2e8f9f7 | 1651 | { |
<> | 144:ef7eb2e8f9f7 | 1652 | assert(g_dspiHandle[5]); |
<> | 144:ef7eb2e8f9f7 | 1653 | DSPI_CommonIRQHandler(SPI5, g_dspiHandle[5]); |
<> | 144:ef7eb2e8f9f7 | 1654 | } |
<> | 144:ef7eb2e8f9f7 | 1655 | #endif |
<> | 144:ef7eb2e8f9f7 | 1656 | |
<> | 144:ef7eb2e8f9f7 | 1657 | #if (FSL_FEATURE_SOC_DSPI_COUNT > 6) |
<> | 144:ef7eb2e8f9f7 | 1658 | #error "Should write the SPIx_DriverIRQHandler function that instance greater than 5 !" |
<> | 144:ef7eb2e8f9f7 | 1659 | #endif |