mbed library sources
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targets/hal/TARGET_Freescale/TARGET_KSDK_MCUS/TARGET_K64F/spi_api.c@146:f64d43ff0c18, 2014-04-02 (annotated)
- Committer:
- mbed_official
- Date:
- Wed Apr 02 21:00:08 2014 +0100
- Revision:
- 146:f64d43ff0c18
Synchronized with git revision d537c51d26da35e031d537f7fc90380fc74cb207
Full URL: https://github.com/mbedmicro/mbed/commit/d537c51d26da35e031d537f7fc90380fc74cb207/
target K64F
Who changed what in which revision?
User | Revision | Line number | New contents of line |
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mbed_official | 146:f64d43ff0c18 | 1 | /* mbed Microcontroller Library |
mbed_official | 146:f64d43ff0c18 | 2 | * Copyright (c) 2013 ARM Limited |
mbed_official | 146:f64d43ff0c18 | 3 | * |
mbed_official | 146:f64d43ff0c18 | 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
mbed_official | 146:f64d43ff0c18 | 5 | * you may not use this file except in compliance with the License. |
mbed_official | 146:f64d43ff0c18 | 6 | * You may obtain a copy of the License at |
mbed_official | 146:f64d43ff0c18 | 7 | * |
mbed_official | 146:f64d43ff0c18 | 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
mbed_official | 146:f64d43ff0c18 | 9 | * |
mbed_official | 146:f64d43ff0c18 | 10 | * Unless required by applicable law or agreed to in writing, software |
mbed_official | 146:f64d43ff0c18 | 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
mbed_official | 146:f64d43ff0c18 | 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
mbed_official | 146:f64d43ff0c18 | 13 | * See the License for the specific language governing permissions and |
mbed_official | 146:f64d43ff0c18 | 14 | * limitations under the License. |
mbed_official | 146:f64d43ff0c18 | 15 | */ |
mbed_official | 146:f64d43ff0c18 | 16 | #include "spi_api.h" |
mbed_official | 146:f64d43ff0c18 | 17 | |
mbed_official | 146:f64d43ff0c18 | 18 | #include <math.h> |
mbed_official | 146:f64d43ff0c18 | 19 | |
mbed_official | 146:f64d43ff0c18 | 20 | #include "cmsis.h" |
mbed_official | 146:f64d43ff0c18 | 21 | #include "pinmap.h" |
mbed_official | 146:f64d43ff0c18 | 22 | #include "error.h" |
mbed_official | 146:f64d43ff0c18 | 23 | #include "fsl_clock_manager.h" |
mbed_official | 146:f64d43ff0c18 | 24 | #include "fsl_dspi_hal.h" |
mbed_official | 146:f64d43ff0c18 | 25 | |
mbed_official | 146:f64d43ff0c18 | 26 | static const PinMap PinMap_SPI_SCLK[] = { |
mbed_official | 146:f64d43ff0c18 | 27 | {PTD1 , SPI_0, 2}, |
mbed_official | 146:f64d43ff0c18 | 28 | {PTE2 , SPI_1, 2}, |
mbed_official | 146:f64d43ff0c18 | 29 | {PTA15, SPI_0, 2}, |
mbed_official | 146:f64d43ff0c18 | 30 | {PTB11, SPI_1, 2}, |
mbed_official | 146:f64d43ff0c18 | 31 | {PTB21, SPI_2, 2}, |
mbed_official | 146:f64d43ff0c18 | 32 | {PTC5 , SPI_0, 2}, |
mbed_official | 146:f64d43ff0c18 | 33 | {PTD5 , SPI_1, 7}, |
mbed_official | 146:f64d43ff0c18 | 34 | {NC , NC , 0} |
mbed_official | 146:f64d43ff0c18 | 35 | }; |
mbed_official | 146:f64d43ff0c18 | 36 | |
mbed_official | 146:f64d43ff0c18 | 37 | static const PinMap PinMap_SPI_MOSI[] = { |
mbed_official | 146:f64d43ff0c18 | 38 | {PTD2 , SPI_0, 2}, |
mbed_official | 146:f64d43ff0c18 | 39 | {PTE1 , SPI_1, 2}, |
mbed_official | 146:f64d43ff0c18 | 40 | {PTE3 , SPI_1, 7}, |
mbed_official | 146:f64d43ff0c18 | 41 | {PTA16, SPI_0, 2}, |
mbed_official | 146:f64d43ff0c18 | 42 | {PTB16, SPI_1, 2}, |
mbed_official | 146:f64d43ff0c18 | 43 | {PTB22, SPI_2, 2}, |
mbed_official | 146:f64d43ff0c18 | 44 | {PTC6 , SPI_0, 2}, |
mbed_official | 146:f64d43ff0c18 | 45 | {PTD2 , SPI_0, 2}, |
mbed_official | 146:f64d43ff0c18 | 46 | {PTD6 , SPI_0, 7}, |
mbed_official | 146:f64d43ff0c18 | 47 | {NC , NC , 0} |
mbed_official | 146:f64d43ff0c18 | 48 | }; |
mbed_official | 146:f64d43ff0c18 | 49 | |
mbed_official | 146:f64d43ff0c18 | 50 | static const PinMap PinMap_SPI_MISO[] = { |
mbed_official | 146:f64d43ff0c18 | 51 | {PTD3 , SPI_0, 2}, |
mbed_official | 146:f64d43ff0c18 | 52 | {PTE1 , SPI_1, 7}, |
mbed_official | 146:f64d43ff0c18 | 53 | {PTE3 , SPI_1, 2}, |
mbed_official | 146:f64d43ff0c18 | 54 | {PTA17, SPI_0, 2}, |
mbed_official | 146:f64d43ff0c18 | 55 | {PTB17, SPI_1, 2}, |
mbed_official | 146:f64d43ff0c18 | 56 | {PTB23, SPI_2, 2}, |
mbed_official | 146:f64d43ff0c18 | 57 | {PTC7 , SPI_0, 2}, |
mbed_official | 146:f64d43ff0c18 | 58 | {PTD3 , SPI_0, 2}, |
mbed_official | 146:f64d43ff0c18 | 59 | {PTD7 , SPI_1, 7}, |
mbed_official | 146:f64d43ff0c18 | 60 | {NC , NC , 0} |
mbed_official | 146:f64d43ff0c18 | 61 | }; |
mbed_official | 146:f64d43ff0c18 | 62 | |
mbed_official | 146:f64d43ff0c18 | 63 | static const PinMap PinMap_SPI_SSEL[] = { |
mbed_official | 146:f64d43ff0c18 | 64 | {PTD0 , SPI_0, 2}, |
mbed_official | 146:f64d43ff0c18 | 65 | {PTE4 , SPI_1, 2}, |
mbed_official | 146:f64d43ff0c18 | 66 | {PTA14, SPI_0, 2}, |
mbed_official | 146:f64d43ff0c18 | 67 | {PTB10, SPI_1, 2}, |
mbed_official | 146:f64d43ff0c18 | 68 | {PTB20, SPI_2, 2}, |
mbed_official | 146:f64d43ff0c18 | 69 | {PTC4 , SPI_0, 2}, |
mbed_official | 146:f64d43ff0c18 | 70 | {PTD4 , SPI_1, 7}, |
mbed_official | 146:f64d43ff0c18 | 71 | {NC , NC , 0} |
mbed_official | 146:f64d43ff0c18 | 72 | }; |
mbed_official | 146:f64d43ff0c18 | 73 | |
mbed_official | 146:f64d43ff0c18 | 74 | static void spi_set_delays(uint32_t instance) { |
mbed_official | 146:f64d43ff0c18 | 75 | dspi_delay_settings_config_t delay_config; |
mbed_official | 146:f64d43ff0c18 | 76 | delay_config.pcsToSck = 1; /*!< PCS to SCK delay (CSSCK): initialize the scalar |
mbed_official | 146:f64d43ff0c18 | 77 | * value to '1' to provide the master with a little |
mbed_official | 146:f64d43ff0c18 | 78 | * more data-in read setup time. |
mbed_official | 146:f64d43ff0c18 | 79 | */ |
mbed_official | 146:f64d43ff0c18 | 80 | delay_config.pcsToSckPre = 0; /*!< PCS to SCK delay prescalar (PCSSCK) */ |
mbed_official | 146:f64d43ff0c18 | 81 | delay_config.afterSckPre = 0; /*!< After SCK delay prescalar (PASC)*/ |
mbed_official | 146:f64d43ff0c18 | 82 | delay_config.afterSck = 0; /*!< After SCK delay scalar (ASC)*/ |
mbed_official | 146:f64d43ff0c18 | 83 | delay_config.afterTransferPre = 0; /*!< Delay after transfer prescalar (PDT)*/ |
mbed_official | 146:f64d43ff0c18 | 84 | delay_config.afterTransfer = 0; |
mbed_official | 146:f64d43ff0c18 | 85 | dspi_hal_configure_delays(instance, kDspiCtar0, &delay_config); |
mbed_official | 146:f64d43ff0c18 | 86 | } |
mbed_official | 146:f64d43ff0c18 | 87 | |
mbed_official | 146:f64d43ff0c18 | 88 | void spi_init(spi_t *obj, PinName mosi, PinName miso, PinName sclk, PinName ssel) { |
mbed_official | 146:f64d43ff0c18 | 89 | // determine the SPI to use |
mbed_official | 146:f64d43ff0c18 | 90 | uint32_t spi_mosi = pinmap_peripheral(mosi, PinMap_SPI_MOSI); |
mbed_official | 146:f64d43ff0c18 | 91 | uint32_t spi_miso = pinmap_peripheral(miso, PinMap_SPI_MISO); |
mbed_official | 146:f64d43ff0c18 | 92 | uint32_t spi_sclk = pinmap_peripheral(sclk, PinMap_SPI_SCLK); |
mbed_official | 146:f64d43ff0c18 | 93 | uint32_t spi_ssel = pinmap_peripheral(ssel, PinMap_SPI_SSEL); |
mbed_official | 146:f64d43ff0c18 | 94 | uint32_t spi_data = pinmap_merge(spi_mosi, spi_miso); |
mbed_official | 146:f64d43ff0c18 | 95 | uint32_t spi_cntl = pinmap_merge(spi_sclk, spi_ssel); |
mbed_official | 146:f64d43ff0c18 | 96 | |
mbed_official | 146:f64d43ff0c18 | 97 | obj->instance = pinmap_merge(spi_data, spi_cntl); |
mbed_official | 146:f64d43ff0c18 | 98 | if ((int)obj->instance == NC) { |
mbed_official | 146:f64d43ff0c18 | 99 | error("SPI pinout mapping failed"); |
mbed_official | 146:f64d43ff0c18 | 100 | } |
mbed_official | 146:f64d43ff0c18 | 101 | |
mbed_official | 146:f64d43ff0c18 | 102 | // enable power and clocking |
mbed_official | 146:f64d43ff0c18 | 103 | clock_manager_set_gate(kClockModuleSPI, obj->instance, true); |
mbed_official | 146:f64d43ff0c18 | 104 | |
mbed_official | 146:f64d43ff0c18 | 105 | dspi_hal_disable(obj->instance); |
mbed_official | 146:f64d43ff0c18 | 106 | // set default format and frequency |
mbed_official | 146:f64d43ff0c18 | 107 | if (ssel == NC) { |
mbed_official | 146:f64d43ff0c18 | 108 | spi_format(obj, 8, 0, 0); // 8 bits, mode 0, master |
mbed_official | 146:f64d43ff0c18 | 109 | } else { |
mbed_official | 146:f64d43ff0c18 | 110 | spi_format(obj, 8, 0, 1); // 8 bits, mode 0, slave |
mbed_official | 146:f64d43ff0c18 | 111 | } |
mbed_official | 146:f64d43ff0c18 | 112 | spi_set_delays(obj->instance); |
mbed_official | 146:f64d43ff0c18 | 113 | spi_frequency(obj, 1000000); |
mbed_official | 146:f64d43ff0c18 | 114 | |
mbed_official | 146:f64d43ff0c18 | 115 | dspi_hal_enable(obj->instance); |
mbed_official | 146:f64d43ff0c18 | 116 | dspi_hal_start_transfer(obj->instance); |
mbed_official | 146:f64d43ff0c18 | 117 | |
mbed_official | 146:f64d43ff0c18 | 118 | // pin out the spi pins |
mbed_official | 146:f64d43ff0c18 | 119 | pinmap_pinout(mosi, PinMap_SPI_MOSI); |
mbed_official | 146:f64d43ff0c18 | 120 | pinmap_pinout(miso, PinMap_SPI_MISO); |
mbed_official | 146:f64d43ff0c18 | 121 | pinmap_pinout(sclk, PinMap_SPI_SCLK); |
mbed_official | 146:f64d43ff0c18 | 122 | if (ssel != NC) { |
mbed_official | 146:f64d43ff0c18 | 123 | pinmap_pinout(ssel, PinMap_SPI_SSEL); |
mbed_official | 146:f64d43ff0c18 | 124 | } |
mbed_official | 146:f64d43ff0c18 | 125 | } |
mbed_official | 146:f64d43ff0c18 | 126 | |
mbed_official | 146:f64d43ff0c18 | 127 | void spi_free(spi_t *obj) { |
mbed_official | 146:f64d43ff0c18 | 128 | // [TODO] |
mbed_official | 146:f64d43ff0c18 | 129 | } |
mbed_official | 146:f64d43ff0c18 | 130 | void spi_format(spi_t *obj, int bits, int mode, int slave) { |
mbed_official | 146:f64d43ff0c18 | 131 | dspi_data_format_config_t config = {0}; |
mbed_official | 146:f64d43ff0c18 | 132 | config.bitsPerFrame = (uint32_t)bits; |
mbed_official | 146:f64d43ff0c18 | 133 | config.clkPolarity = (mode & 0x2) ? kDspiClockPolarity_ActiveLow : kDspiClockPolarity_ActiveHigh; |
mbed_official | 146:f64d43ff0c18 | 134 | config.clkPhase = (mode & 0x1) ? kDspiClockPhase_SecondEdge : kDspiClockPhase_FirstEdge; |
mbed_official | 146:f64d43ff0c18 | 135 | config.direction = kDspiMsbFirst; |
mbed_official | 146:f64d43ff0c18 | 136 | dspi_status_t result = dspi_hal_configure_data_format(obj->instance, kDspiCtar0, &config); |
mbed_official | 146:f64d43ff0c18 | 137 | if (result != kStatus_DSPI_Success) { |
mbed_official | 146:f64d43ff0c18 | 138 | error("Failed to configure SPI data format"); |
mbed_official | 146:f64d43ff0c18 | 139 | } |
mbed_official | 146:f64d43ff0c18 | 140 | |
mbed_official | 146:f64d43ff0c18 | 141 | if (slave) { |
mbed_official | 146:f64d43ff0c18 | 142 | dspi_hal_set_master_slave(obj->instance, kDspiSlave); |
mbed_official | 146:f64d43ff0c18 | 143 | } else { |
mbed_official | 146:f64d43ff0c18 | 144 | dspi_hal_set_master_slave(obj->instance, kDspiMaster); |
mbed_official | 146:f64d43ff0c18 | 145 | } |
mbed_official | 146:f64d43ff0c18 | 146 | } |
mbed_official | 146:f64d43ff0c18 | 147 | |
mbed_official | 146:f64d43ff0c18 | 148 | void spi_frequency(spi_t *obj, int hz) { |
mbed_official | 146:f64d43ff0c18 | 149 | uint32_t busClock; |
mbed_official | 146:f64d43ff0c18 | 150 | clock_manager_get_frequency(kBusClock, &busClock); |
mbed_official | 146:f64d43ff0c18 | 151 | dspi_hal_set_baud(obj->instance, kDspiCtar0, (uint32_t)hz, busClock); |
mbed_official | 146:f64d43ff0c18 | 152 | } |
mbed_official | 146:f64d43ff0c18 | 153 | |
mbed_official | 146:f64d43ff0c18 | 154 | static inline int spi_writeable(spi_t * obj) { |
mbed_official | 146:f64d43ff0c18 | 155 | return dspi_hal_get_status_flag(obj->instance, kDspiTxFifoFillRequest); |
mbed_official | 146:f64d43ff0c18 | 156 | } |
mbed_official | 146:f64d43ff0c18 | 157 | |
mbed_official | 146:f64d43ff0c18 | 158 | static inline int spi_readable(spi_t * obj) { |
mbed_official | 146:f64d43ff0c18 | 159 | return dspi_hal_get_status_flag(obj->instance, kDspiRxFifoDrainRequest); |
mbed_official | 146:f64d43ff0c18 | 160 | } |
mbed_official | 146:f64d43ff0c18 | 161 | |
mbed_official | 146:f64d43ff0c18 | 162 | int spi_master_write(spi_t *obj, int value) { |
mbed_official | 146:f64d43ff0c18 | 163 | // wait tx buffer empty |
mbed_official | 146:f64d43ff0c18 | 164 | while(!spi_writeable(obj)); |
mbed_official | 146:f64d43ff0c18 | 165 | dspi_command_config_t command = {0}; |
mbed_official | 146:f64d43ff0c18 | 166 | command.isEndOfQueue = true; |
mbed_official | 146:f64d43ff0c18 | 167 | command.isChipSelectContinuous = 0; |
mbed_official | 146:f64d43ff0c18 | 168 | dspi_hal_write_data_master_mode(obj->instance, &command, (uint16_t)value); |
mbed_official | 146:f64d43ff0c18 | 169 | dspi_hal_clear_status_flag(obj->instance, kDspiTxFifoFillRequest); |
mbed_official | 146:f64d43ff0c18 | 170 | |
mbed_official | 146:f64d43ff0c18 | 171 | // wait rx buffer full |
mbed_official | 146:f64d43ff0c18 | 172 | while (!spi_readable(obj)); |
mbed_official | 146:f64d43ff0c18 | 173 | dspi_hal_clear_status_flag(obj->instance, kDspiRxFifoDrainRequest); |
mbed_official | 146:f64d43ff0c18 | 174 | return dspi_hal_read_data(obj->instance) & 0xff; |
mbed_official | 146:f64d43ff0c18 | 175 | } |
mbed_official | 146:f64d43ff0c18 | 176 | |
mbed_official | 146:f64d43ff0c18 | 177 | int spi_slave_receive(spi_t *obj) { |
mbed_official | 146:f64d43ff0c18 | 178 | return spi_readable(obj); |
mbed_official | 146:f64d43ff0c18 | 179 | } |
mbed_official | 146:f64d43ff0c18 | 180 | |
mbed_official | 146:f64d43ff0c18 | 181 | int spi_slave_read(spi_t *obj) { |
mbed_official | 146:f64d43ff0c18 | 182 | return dspi_hal_read_data(obj->instance); |
mbed_official | 146:f64d43ff0c18 | 183 | } |
mbed_official | 146:f64d43ff0c18 | 184 | |
mbed_official | 146:f64d43ff0c18 | 185 | void spi_slave_write(spi_t *obj, int value) { |
mbed_official | 146:f64d43ff0c18 | 186 | while (!spi_writeable(obj)); |
mbed_official | 146:f64d43ff0c18 | 187 | dspi_hal_write_data_slave_mode(obj->instance, (uint32_t)value); |
mbed_official | 146:f64d43ff0c18 | 188 | } |