mbed library sources
Dependents: frdm_kl05z_gpio_test
Fork of mbed-src by
targets/hal/TARGET_STM/TARGET_DISCO_F407VG/spi_api.c@242:7074e42da0b2, 2014-06-27 (annotated)
- Committer:
- mbed_official
- Date:
- Fri Jun 27 07:30:09 2014 +0100
- Revision:
- 242:7074e42da0b2
- Parent:
- 227:7bd0639b8911
Synchronized with git revision 124ef5e3add9e74a3221347a3fbeea7c8b3cf353
Full URL: https://github.com/mbedmicro/mbed/commit/124ef5e3add9e74a3221347a3fbeea7c8b3cf353/
[DISCO_F407VG] HAL update.
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
mbed_official | 133:d4dda5c437f0 | 1 | /* mbed Microcontroller Library |
mbed_official | 133:d4dda5c437f0 | 2 | ******************************************************************************* |
mbed_official | 133:d4dda5c437f0 | 3 | * Copyright (c) 2014, STMicroelectronics |
mbed_official | 133:d4dda5c437f0 | 4 | * All rights reserved. |
mbed_official | 133:d4dda5c437f0 | 5 | * |
mbed_official | 133:d4dda5c437f0 | 6 | * Redistribution and use in source and binary forms, with or without |
mbed_official | 133:d4dda5c437f0 | 7 | * modification, are permitted provided that the following conditions are met: |
mbed_official | 133:d4dda5c437f0 | 8 | * |
mbed_official | 133:d4dda5c437f0 | 9 | * 1. Redistributions of source code must retain the above copyright notice, |
mbed_official | 133:d4dda5c437f0 | 10 | * this list of conditions and the following disclaimer. |
mbed_official | 133:d4dda5c437f0 | 11 | * 2. Redistributions in binary form must reproduce the above copyright notice, |
mbed_official | 133:d4dda5c437f0 | 12 | * this list of conditions and the following disclaimer in the documentation |
mbed_official | 133:d4dda5c437f0 | 13 | * and/or other materials provided with the distribution. |
mbed_official | 133:d4dda5c437f0 | 14 | * 3. Neither the name of STMicroelectronics nor the names of its contributors |
mbed_official | 133:d4dda5c437f0 | 15 | * may be used to endorse or promote products derived from this software |
mbed_official | 133:d4dda5c437f0 | 16 | * without specific prior written permission. |
mbed_official | 133:d4dda5c437f0 | 17 | * |
mbed_official | 133:d4dda5c437f0 | 18 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
mbed_official | 133:d4dda5c437f0 | 19 | * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
mbed_official | 133:d4dda5c437f0 | 20 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
mbed_official | 133:d4dda5c437f0 | 21 | * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE |
mbed_official | 133:d4dda5c437f0 | 22 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
mbed_official | 133:d4dda5c437f0 | 23 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR |
mbed_official | 133:d4dda5c437f0 | 24 | * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER |
mbed_official | 133:d4dda5c437f0 | 25 | * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, |
mbed_official | 133:d4dda5c437f0 | 26 | * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
mbed_official | 133:d4dda5c437f0 | 27 | * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
mbed_official | 133:d4dda5c437f0 | 28 | ******************************************************************************* |
mbed_official | 133:d4dda5c437f0 | 29 | */ |
mbed_official | 242:7074e42da0b2 | 30 | #include "mbed_assert.h" |
mbed_official | 133:d4dda5c437f0 | 31 | #include "spi_api.h" |
mbed_official | 133:d4dda5c437f0 | 32 | |
mbed_official | 133:d4dda5c437f0 | 33 | #if DEVICE_SPI |
mbed_official | 133:d4dda5c437f0 | 34 | |
mbed_official | 133:d4dda5c437f0 | 35 | #include <math.h> |
mbed_official | 133:d4dda5c437f0 | 36 | #include "cmsis.h" |
mbed_official | 133:d4dda5c437f0 | 37 | #include "pinmap.h" |
mbed_official | 133:d4dda5c437f0 | 38 | |
mbed_official | 133:d4dda5c437f0 | 39 | static const PinMap PinMap_SPI_MOSI[] = { |
mbed_official | 133:d4dda5c437f0 | 40 | {PA_7, SPI_1, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF5_SPI1)}, |
mbed_official | 133:d4dda5c437f0 | 41 | {PB_5, SPI_1, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF5_SPI1)}, |
mbed_official | 242:7074e42da0b2 | 42 | // {PB_5, SPI_3, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF6_SPI3)}, |
mbed_official | 133:d4dda5c437f0 | 43 | {PB_15, SPI_2, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF5_SPI2)}, |
mbed_official | 133:d4dda5c437f0 | 44 | {PC_3, SPI_2, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF5_SPI2)}, |
mbed_official | 133:d4dda5c437f0 | 45 | {PC_12, SPI_3, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF6_SPI3)}, |
mbed_official | 133:d4dda5c437f0 | 46 | {NC, NC, 0} |
mbed_official | 133:d4dda5c437f0 | 47 | }; |
mbed_official | 133:d4dda5c437f0 | 48 | |
mbed_official | 133:d4dda5c437f0 | 49 | static const PinMap PinMap_SPI_MISO[] = { |
mbed_official | 133:d4dda5c437f0 | 50 | {PA_6, SPI_1, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF5_SPI1)}, |
mbed_official | 133:d4dda5c437f0 | 51 | {PB_4, SPI_1, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF5_SPI1)}, |
mbed_official | 242:7074e42da0b2 | 52 | // {PB_4, SPI_3, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF6_SPI3)}, |
mbed_official | 133:d4dda5c437f0 | 53 | {PB_14, SPI_2, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF5_SPI2)}, |
mbed_official | 133:d4dda5c437f0 | 54 | {PC_2, SPI_2, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF5_SPI2)}, |
mbed_official | 133:d4dda5c437f0 | 55 | {PC_11, SPI_3, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF6_SPI3)}, |
mbed_official | 133:d4dda5c437f0 | 56 | {NC, NC, 0} |
mbed_official | 133:d4dda5c437f0 | 57 | }; |
mbed_official | 133:d4dda5c437f0 | 58 | |
mbed_official | 133:d4dda5c437f0 | 59 | static const PinMap PinMap_SPI_SCLK[] = { |
mbed_official | 133:d4dda5c437f0 | 60 | {PA_5, SPI_1, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF5_SPI1)}, |
mbed_official | 133:d4dda5c437f0 | 61 | {PB_3, SPI_1, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF5_SPI1)}, |
mbed_official | 242:7074e42da0b2 | 62 | // {PB_3, SPI_3, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF6_SPI3)}, |
mbed_official | 133:d4dda5c437f0 | 63 | {PB_10, SPI_2, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF5_SPI2)}, |
mbed_official | 133:d4dda5c437f0 | 64 | {PB_13, SPI_2, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF5_SPI2)}, |
mbed_official | 133:d4dda5c437f0 | 65 | {PC_10, SPI_3, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF6_SPI3)}, |
mbed_official | 133:d4dda5c437f0 | 66 | {NC, NC, 0} |
mbed_official | 133:d4dda5c437f0 | 67 | }; |
mbed_official | 133:d4dda5c437f0 | 68 | |
mbed_official | 133:d4dda5c437f0 | 69 | static const PinMap PinMap_SPI_SSEL[] = { |
mbed_official | 242:7074e42da0b2 | 70 | {PA_4, SPI_1, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_NOPULL, GPIO_AF5_SPI1)}, |
mbed_official | 242:7074e42da0b2 | 71 | // {PA_4, SPI_3, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_NOPULL, GPIO_AF6_SPI3)}, |
mbed_official | 242:7074e42da0b2 | 72 | {PA_15, SPI_1, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_NOPULL, GPIO_AF5_SPI1)}, |
mbed_official | 242:7074e42da0b2 | 73 | // {PA_15, SPI_3, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_NOPULL, GPIO_AF6_SPI3)}, |
mbed_official | 242:7074e42da0b2 | 74 | {PB_9, SPI_2, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_NOPULL, GPIO_AF5_SPI2)}, |
mbed_official | 242:7074e42da0b2 | 75 | {PB_12, SPI_2, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_NOPULL, GPIO_AF5_SPI2)}, |
mbed_official | 133:d4dda5c437f0 | 76 | {NC, NC, 0} |
mbed_official | 133:d4dda5c437f0 | 77 | }; |
mbed_official | 133:d4dda5c437f0 | 78 | |
mbed_official | 133:d4dda5c437f0 | 79 | static SPI_HandleTypeDef SpiHandle; |
mbed_official | 133:d4dda5c437f0 | 80 | |
mbed_official | 133:d4dda5c437f0 | 81 | static void init_spi(spi_t *obj) { |
mbed_official | 133:d4dda5c437f0 | 82 | SpiHandle.Instance = (SPI_TypeDef *)(obj->spi); |
mbed_official | 133:d4dda5c437f0 | 83 | |
mbed_official | 133:d4dda5c437f0 | 84 | __HAL_SPI_DISABLE(&SpiHandle); |
mbed_official | 133:d4dda5c437f0 | 85 | |
mbed_official | 133:d4dda5c437f0 | 86 | SpiHandle.Init.Mode = obj->mode; |
mbed_official | 133:d4dda5c437f0 | 87 | SpiHandle.Init.BaudRatePrescaler = obj->br_presc; |
mbed_official | 133:d4dda5c437f0 | 88 | SpiHandle.Init.Direction = SPI_DIRECTION_2LINES; |
mbed_official | 133:d4dda5c437f0 | 89 | SpiHandle.Init.CLKPhase = obj->cpha; |
mbed_official | 133:d4dda5c437f0 | 90 | SpiHandle.Init.CLKPolarity = obj->cpol; |
mbed_official | 133:d4dda5c437f0 | 91 | SpiHandle.Init.CRCCalculation = SPI_CRCCALCULATION_DISABLED; |
mbed_official | 133:d4dda5c437f0 | 92 | SpiHandle.Init.CRCPolynomial = 7; |
mbed_official | 133:d4dda5c437f0 | 93 | SpiHandle.Init.DataSize = obj->bits; |
mbed_official | 133:d4dda5c437f0 | 94 | SpiHandle.Init.FirstBit = SPI_FIRSTBIT_MSB; |
mbed_official | 133:d4dda5c437f0 | 95 | SpiHandle.Init.NSS = obj->nss; |
mbed_official | 133:d4dda5c437f0 | 96 | SpiHandle.Init.TIMode = SPI_TIMODE_DISABLED; |
mbed_official | 133:d4dda5c437f0 | 97 | |
mbed_official | 133:d4dda5c437f0 | 98 | HAL_SPI_Init(&SpiHandle); |
mbed_official | 133:d4dda5c437f0 | 99 | |
mbed_official | 133:d4dda5c437f0 | 100 | __HAL_SPI_ENABLE(&SpiHandle); |
mbed_official | 133:d4dda5c437f0 | 101 | } |
mbed_official | 133:d4dda5c437f0 | 102 | |
mbed_official | 133:d4dda5c437f0 | 103 | void spi_init(spi_t *obj, PinName mosi, PinName miso, PinName sclk, PinName ssel) { |
mbed_official | 133:d4dda5c437f0 | 104 | // Determine the SPI to use |
mbed_official | 133:d4dda5c437f0 | 105 | SPIName spi_mosi = (SPIName)pinmap_peripheral(mosi, PinMap_SPI_MOSI); |
mbed_official | 133:d4dda5c437f0 | 106 | SPIName spi_miso = (SPIName)pinmap_peripheral(miso, PinMap_SPI_MISO); |
mbed_official | 133:d4dda5c437f0 | 107 | SPIName spi_sclk = (SPIName)pinmap_peripheral(sclk, PinMap_SPI_SCLK); |
mbed_official | 133:d4dda5c437f0 | 108 | SPIName spi_ssel = (SPIName)pinmap_peripheral(ssel, PinMap_SPI_SSEL); |
mbed_official | 133:d4dda5c437f0 | 109 | |
mbed_official | 133:d4dda5c437f0 | 110 | SPIName spi_data = (SPIName)pinmap_merge(spi_mosi, spi_miso); |
mbed_official | 133:d4dda5c437f0 | 111 | SPIName spi_cntl = (SPIName)pinmap_merge(spi_sclk, spi_ssel); |
mbed_official | 133:d4dda5c437f0 | 112 | |
mbed_official | 133:d4dda5c437f0 | 113 | obj->spi = (SPIName)pinmap_merge(spi_data, spi_cntl); |
mbed_official | 227:7bd0639b8911 | 114 | MBED_ASSERT(obj->spi != (SPIName)NC); |
mbed_official | 133:d4dda5c437f0 | 115 | |
mbed_official | 133:d4dda5c437f0 | 116 | // Enable SPI clock |
mbed_official | 133:d4dda5c437f0 | 117 | if (obj->spi == SPI_1) { |
mbed_official | 133:d4dda5c437f0 | 118 | __SPI1_CLK_ENABLE(); |
mbed_official | 133:d4dda5c437f0 | 119 | } |
mbed_official | 133:d4dda5c437f0 | 120 | if (obj->spi == SPI_2) { |
mbed_official | 133:d4dda5c437f0 | 121 | __SPI2_CLK_ENABLE(); |
mbed_official | 133:d4dda5c437f0 | 122 | } |
mbed_official | 133:d4dda5c437f0 | 123 | if (obj->spi == SPI_3) { |
mbed_official | 133:d4dda5c437f0 | 124 | __SPI3_CLK_ENABLE(); |
mbed_official | 133:d4dda5c437f0 | 125 | } |
mbed_official | 133:d4dda5c437f0 | 126 | |
mbed_official | 133:d4dda5c437f0 | 127 | // Configure the SPI pins |
mbed_official | 133:d4dda5c437f0 | 128 | pinmap_pinout(mosi, PinMap_SPI_MOSI); |
mbed_official | 133:d4dda5c437f0 | 129 | pinmap_pinout(miso, PinMap_SPI_MISO); |
mbed_official | 133:d4dda5c437f0 | 130 | pinmap_pinout(sclk, PinMap_SPI_SCLK); |
mbed_official | 133:d4dda5c437f0 | 131 | |
mbed_official | 133:d4dda5c437f0 | 132 | // Save new values |
mbed_official | 133:d4dda5c437f0 | 133 | obj->bits = SPI_DATASIZE_8BIT; |
mbed_official | 133:d4dda5c437f0 | 134 | obj->cpol = SPI_POLARITY_LOW; |
mbed_official | 133:d4dda5c437f0 | 135 | obj->cpha = SPI_PHASE_1EDGE; |
mbed_official | 133:d4dda5c437f0 | 136 | obj->br_presc = SPI_BAUDRATEPRESCALER_256; |
mbed_official | 133:d4dda5c437f0 | 137 | |
mbed_official | 242:7074e42da0b2 | 138 | obj->pin_miso = miso; |
mbed_official | 242:7074e42da0b2 | 139 | obj->pin_mosi = mosi; |
mbed_official | 242:7074e42da0b2 | 140 | obj->pin_sclk = sclk; |
mbed_official | 242:7074e42da0b2 | 141 | obj->pin_ssel = ssel; |
mbed_official | 242:7074e42da0b2 | 142 | |
mbed_official | 133:d4dda5c437f0 | 143 | if (ssel == NC) { // SW NSS Master mode |
mbed_official | 133:d4dda5c437f0 | 144 | obj->mode = SPI_MODE_MASTER; |
mbed_official | 133:d4dda5c437f0 | 145 | obj->nss = SPI_NSS_SOFT; |
mbed_official | 242:7074e42da0b2 | 146 | } else { // Slave |
mbed_official | 133:d4dda5c437f0 | 147 | pinmap_pinout(ssel, PinMap_SPI_SSEL); |
mbed_official | 133:d4dda5c437f0 | 148 | obj->mode = SPI_MODE_SLAVE; |
mbed_official | 133:d4dda5c437f0 | 149 | obj->nss = SPI_NSS_HARD_INPUT; |
mbed_official | 133:d4dda5c437f0 | 150 | } |
mbed_official | 133:d4dda5c437f0 | 151 | |
mbed_official | 133:d4dda5c437f0 | 152 | init_spi(obj); |
mbed_official | 133:d4dda5c437f0 | 153 | } |
mbed_official | 133:d4dda5c437f0 | 154 | |
mbed_official | 133:d4dda5c437f0 | 155 | void spi_free(spi_t *obj) { |
mbed_official | 242:7074e42da0b2 | 156 | // Reset SPI and disable clock |
mbed_official | 242:7074e42da0b2 | 157 | if (obj->spi == SPI_1) { |
mbed_official | 242:7074e42da0b2 | 158 | __SPI1_FORCE_RESET(); |
mbed_official | 242:7074e42da0b2 | 159 | __SPI1_RELEASE_RESET(); |
mbed_official | 242:7074e42da0b2 | 160 | __SPI1_CLK_DISABLE(); |
mbed_official | 242:7074e42da0b2 | 161 | } |
mbed_official | 242:7074e42da0b2 | 162 | |
mbed_official | 242:7074e42da0b2 | 163 | if (obj->spi == SPI_2) { |
mbed_official | 242:7074e42da0b2 | 164 | __SPI2_FORCE_RESET(); |
mbed_official | 242:7074e42da0b2 | 165 | __SPI2_RELEASE_RESET(); |
mbed_official | 242:7074e42da0b2 | 166 | __SPI2_CLK_DISABLE(); |
mbed_official | 242:7074e42da0b2 | 167 | } |
mbed_official | 242:7074e42da0b2 | 168 | |
mbed_official | 242:7074e42da0b2 | 169 | if (obj->spi == SPI_3) { |
mbed_official | 242:7074e42da0b2 | 170 | __SPI3_FORCE_RESET(); |
mbed_official | 242:7074e42da0b2 | 171 | __SPI3_RELEASE_RESET(); |
mbed_official | 242:7074e42da0b2 | 172 | __SPI3_CLK_DISABLE(); |
mbed_official | 242:7074e42da0b2 | 173 | } |
mbed_official | 242:7074e42da0b2 | 174 | |
mbed_official | 242:7074e42da0b2 | 175 | // Configure GPIOs |
mbed_official | 242:7074e42da0b2 | 176 | pin_function(obj->pin_miso, STM_PIN_DATA(STM_MODE_INPUT, GPIO_NOPULL, 0)); |
mbed_official | 242:7074e42da0b2 | 177 | pin_function(obj->pin_mosi, STM_PIN_DATA(STM_MODE_INPUT, GPIO_NOPULL, 0)); |
mbed_official | 242:7074e42da0b2 | 178 | pin_function(obj->pin_sclk, STM_PIN_DATA(STM_MODE_INPUT, GPIO_NOPULL, 0)); |
mbed_official | 242:7074e42da0b2 | 179 | pin_function(obj->pin_ssel, STM_PIN_DATA(STM_MODE_INPUT, GPIO_NOPULL, 0)); |
mbed_official | 133:d4dda5c437f0 | 180 | } |
mbed_official | 133:d4dda5c437f0 | 181 | |
mbed_official | 227:7bd0639b8911 | 182 | void spi_format(spi_t *obj, int bits, int mode, int slave) { |
mbed_official | 133:d4dda5c437f0 | 183 | // Save new values |
mbed_official | 242:7074e42da0b2 | 184 | if (bits == 16) { |
mbed_official | 242:7074e42da0b2 | 185 | obj->bits = SPI_DATASIZE_16BIT; |
mbed_official | 242:7074e42da0b2 | 186 | } else { |
mbed_official | 133:d4dda5c437f0 | 187 | obj->bits = SPI_DATASIZE_8BIT; |
mbed_official | 133:d4dda5c437f0 | 188 | } |
mbed_official | 133:d4dda5c437f0 | 189 | |
mbed_official | 133:d4dda5c437f0 | 190 | switch (mode) { |
mbed_official | 133:d4dda5c437f0 | 191 | case 0: |
mbed_official | 133:d4dda5c437f0 | 192 | obj->cpol = SPI_POLARITY_LOW; |
mbed_official | 133:d4dda5c437f0 | 193 | obj->cpha = SPI_PHASE_1EDGE; |
mbed_official | 133:d4dda5c437f0 | 194 | break; |
mbed_official | 133:d4dda5c437f0 | 195 | case 1: |
mbed_official | 133:d4dda5c437f0 | 196 | obj->cpol = SPI_POLARITY_LOW; |
mbed_official | 133:d4dda5c437f0 | 197 | obj->cpha = SPI_PHASE_2EDGE; |
mbed_official | 133:d4dda5c437f0 | 198 | break; |
mbed_official | 133:d4dda5c437f0 | 199 | case 2: |
mbed_official | 133:d4dda5c437f0 | 200 | obj->cpol = SPI_POLARITY_HIGH; |
mbed_official | 227:7bd0639b8911 | 201 | obj->cpha = SPI_PHASE_1EDGE; |
mbed_official | 133:d4dda5c437f0 | 202 | break; |
mbed_official | 133:d4dda5c437f0 | 203 | default: |
mbed_official | 133:d4dda5c437f0 | 204 | obj->cpol = SPI_POLARITY_HIGH; |
mbed_official | 227:7bd0639b8911 | 205 | obj->cpha = SPI_PHASE_2EDGE; |
mbed_official | 133:d4dda5c437f0 | 206 | break; |
mbed_official | 133:d4dda5c437f0 | 207 | } |
mbed_official | 133:d4dda5c437f0 | 208 | |
mbed_official | 133:d4dda5c437f0 | 209 | if (slave == 0) { |
mbed_official | 133:d4dda5c437f0 | 210 | obj->mode = SPI_MODE_MASTER; |
mbed_official | 133:d4dda5c437f0 | 211 | obj->nss = SPI_NSS_SOFT; |
mbed_official | 242:7074e42da0b2 | 212 | } else { |
mbed_official | 133:d4dda5c437f0 | 213 | obj->mode = SPI_MODE_SLAVE; |
mbed_official | 227:7bd0639b8911 | 214 | obj->nss = SPI_NSS_HARD_INPUT; |
mbed_official | 133:d4dda5c437f0 | 215 | } |
mbed_official | 133:d4dda5c437f0 | 216 | |
mbed_official | 133:d4dda5c437f0 | 217 | init_spi(obj); |
mbed_official | 133:d4dda5c437f0 | 218 | } |
mbed_official | 133:d4dda5c437f0 | 219 | |
mbed_official | 133:d4dda5c437f0 | 220 | void spi_frequency(spi_t *obj, int hz) { |
mbed_official | 133:d4dda5c437f0 | 221 | // Note: The frequencies are obtained with SPI1 clock = 84 MHz (APB2 clock) |
mbed_official | 133:d4dda5c437f0 | 222 | if (hz < 600000) { |
mbed_official | 133:d4dda5c437f0 | 223 | obj->br_presc = SPI_BAUDRATEPRESCALER_256; // 330 kHz |
mbed_official | 242:7074e42da0b2 | 224 | } else if ((hz >= 600000) && (hz < 1000000)) { |
mbed_official | 133:d4dda5c437f0 | 225 | obj->br_presc = SPI_BAUDRATEPRESCALER_128; // 656 kHz |
mbed_official | 242:7074e42da0b2 | 226 | } else if ((hz >= 1000000) && (hz < 2000000)) { |
mbed_official | 133:d4dda5c437f0 | 227 | obj->br_presc = SPI_BAUDRATEPRESCALER_64; // 1.3 MHz |
mbed_official | 242:7074e42da0b2 | 228 | } else if ((hz >= 2000000) && (hz < 5000000)) { |
mbed_official | 133:d4dda5c437f0 | 229 | obj->br_presc = SPI_BAUDRATEPRESCALER_32; // 2.6 MHz |
mbed_official | 242:7074e42da0b2 | 230 | } else if ((hz >= 5000000) && (hz < 10000000)) { |
mbed_official | 133:d4dda5c437f0 | 231 | obj->br_presc = SPI_BAUDRATEPRESCALER_16; // 5.25 MHz |
mbed_official | 242:7074e42da0b2 | 232 | } else if ((hz >= 10000000) && (hz < 21000000)) { |
mbed_official | 133:d4dda5c437f0 | 233 | obj->br_presc = SPI_BAUDRATEPRESCALER_8; // 10.5 MHz |
mbed_official | 242:7074e42da0b2 | 234 | } else if ((hz >= 21000000) && (hz < 42000000)) { |
mbed_official | 133:d4dda5c437f0 | 235 | obj->br_presc = SPI_BAUDRATEPRESCALER_4; // 21 MHz |
mbed_official | 242:7074e42da0b2 | 236 | } else { // >= 42000000 |
mbed_official | 133:d4dda5c437f0 | 237 | obj->br_presc = SPI_BAUDRATEPRESCALER_2; // 42 MHz |
mbed_official | 133:d4dda5c437f0 | 238 | } |
mbed_official | 133:d4dda5c437f0 | 239 | init_spi(obj); |
mbed_official | 133:d4dda5c437f0 | 240 | } |
mbed_official | 133:d4dda5c437f0 | 241 | |
mbed_official | 133:d4dda5c437f0 | 242 | static inline int ssp_readable(spi_t *obj) { |
mbed_official | 133:d4dda5c437f0 | 243 | int status; |
mbed_official | 133:d4dda5c437f0 | 244 | SpiHandle.Instance = (SPI_TypeDef *)(obj->spi); |
mbed_official | 133:d4dda5c437f0 | 245 | // Check if data is received |
mbed_official | 133:d4dda5c437f0 | 246 | status = ((__HAL_SPI_GET_FLAG(&SpiHandle, SPI_FLAG_RXNE) != RESET) ? 1 : 0); |
mbed_official | 227:7bd0639b8911 | 247 | return status; |
mbed_official | 133:d4dda5c437f0 | 248 | } |
mbed_official | 133:d4dda5c437f0 | 249 | |
mbed_official | 133:d4dda5c437f0 | 250 | static inline int ssp_writeable(spi_t *obj) { |
mbed_official | 133:d4dda5c437f0 | 251 | int status; |
mbed_official | 133:d4dda5c437f0 | 252 | SpiHandle.Instance = (SPI_TypeDef *)(obj->spi); |
mbed_official | 133:d4dda5c437f0 | 253 | // Check if data is transmitted |
mbed_official | 133:d4dda5c437f0 | 254 | status = ((__HAL_SPI_GET_FLAG(&SpiHandle, SPI_FLAG_TXE) != RESET) ? 1 : 0); |
mbed_official | 133:d4dda5c437f0 | 255 | return status; |
mbed_official | 133:d4dda5c437f0 | 256 | } |
mbed_official | 133:d4dda5c437f0 | 257 | |
mbed_official | 133:d4dda5c437f0 | 258 | static inline void ssp_write(spi_t *obj, int value) { |
mbed_official | 133:d4dda5c437f0 | 259 | SPI_TypeDef *spi = (SPI_TypeDef *)(obj->spi); |
mbed_official | 133:d4dda5c437f0 | 260 | while (!ssp_writeable(obj)); |
mbed_official | 133:d4dda5c437f0 | 261 | spi->DR = (uint16_t)value; |
mbed_official | 133:d4dda5c437f0 | 262 | } |
mbed_official | 133:d4dda5c437f0 | 263 | |
mbed_official | 133:d4dda5c437f0 | 264 | static inline int ssp_read(spi_t *obj) { |
mbed_official | 133:d4dda5c437f0 | 265 | SPI_TypeDef *spi = (SPI_TypeDef *)(obj->spi); |
mbed_official | 133:d4dda5c437f0 | 266 | while (!ssp_readable(obj)); |
mbed_official | 133:d4dda5c437f0 | 267 | return (int)spi->DR; |
mbed_official | 133:d4dda5c437f0 | 268 | } |
mbed_official | 133:d4dda5c437f0 | 269 | |
mbed_official | 133:d4dda5c437f0 | 270 | static inline int ssp_busy(spi_t *obj) { |
mbed_official | 133:d4dda5c437f0 | 271 | int status; |
mbed_official | 133:d4dda5c437f0 | 272 | SpiHandle.Instance = (SPI_TypeDef *)(obj->spi); |
mbed_official | 133:d4dda5c437f0 | 273 | status = ((__HAL_SPI_GET_FLAG(&SpiHandle, SPI_FLAG_BSY) != RESET) ? 1 : 0); |
mbed_official | 133:d4dda5c437f0 | 274 | return status; |
mbed_official | 133:d4dda5c437f0 | 275 | } |
mbed_official | 133:d4dda5c437f0 | 276 | |
mbed_official | 133:d4dda5c437f0 | 277 | int spi_master_write(spi_t *obj, int value) { |
mbed_official | 133:d4dda5c437f0 | 278 | ssp_write(obj, value); |
mbed_official | 133:d4dda5c437f0 | 279 | return ssp_read(obj); |
mbed_official | 133:d4dda5c437f0 | 280 | } |
mbed_official | 133:d4dda5c437f0 | 281 | |
mbed_official | 133:d4dda5c437f0 | 282 | int spi_slave_receive(spi_t *obj) { |
mbed_official | 242:7074e42da0b2 | 283 | return ((ssp_readable(obj) && !ssp_busy(obj)) ? 1 : 0); |
mbed_official | 133:d4dda5c437f0 | 284 | }; |
mbed_official | 133:d4dda5c437f0 | 285 | |
mbed_official | 133:d4dda5c437f0 | 286 | int spi_slave_read(spi_t *obj) { |
mbed_official | 133:d4dda5c437f0 | 287 | SPI_TypeDef *spi = (SPI_TypeDef *)(obj->spi); |
mbed_official | 242:7074e42da0b2 | 288 | while (!ssp_readable(obj)); |
mbed_official | 133:d4dda5c437f0 | 289 | return (int)spi->DR; |
mbed_official | 133:d4dda5c437f0 | 290 | } |
mbed_official | 133:d4dda5c437f0 | 291 | |
mbed_official | 133:d4dda5c437f0 | 292 | void spi_slave_write(spi_t *obj, int value) { |
mbed_official | 133:d4dda5c437f0 | 293 | SPI_TypeDef *spi = (SPI_TypeDef *)(obj->spi); |
mbed_official | 133:d4dda5c437f0 | 294 | while (!ssp_writeable(obj)); |
mbed_official | 133:d4dda5c437f0 | 295 | spi->DR = (uint16_t)value; |
mbed_official | 133:d4dda5c437f0 | 296 | } |
mbed_official | 133:d4dda5c437f0 | 297 | |
mbed_official | 133:d4dda5c437f0 | 298 | int spi_busy(spi_t *obj) { |
mbed_official | 133:d4dda5c437f0 | 299 | return ssp_busy(obj); |
mbed_official | 133:d4dda5c437f0 | 300 | } |
mbed_official | 133:d4dda5c437f0 | 301 | |
mbed_official | 133:d4dda5c437f0 | 302 | #endif |