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mbed library sources

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Superseded

This library was superseded by mbed-dev - https://os.mbed.com/users/mbed_official/code/mbed-dev/.

Development branch of the mbed library sources. This library is kept in synch with the latest changes from the mbed SDK and it is not guaranteed to work.

If you are looking for a stable and tested release, please import one of the official mbed library releases:

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The official Mbed 2 C/C++ SDK provides the software platform and libraries to build your applications.

Last commit 20 Feb 2019 by mbed official

targets/hal/TARGET_STM/TARGET_NUCLEO_F401RE/spi_api.c@402:09075a3b15e3, 2014-11-14 (annotated)

Committer:
mbed_official
Date:
Fri Nov 14 09:00:07 2014 +0000
Revision:
402:09075a3b15e3
Parent:
233:1bbc1451db33
Child:
404:cbc7dfcb0ce9
Synchronized with git revision dffeedc96e731e30785ca4a7842fb9769412bea1



Full URL: https://github.com/mbedmicro/mbed/commit/dffeedc96e731e30785ca4a7842fb9769412bea1/



Targets: add USBTX and USBRX pin definitions for targets that don't provide them

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 87:085cde657901 1 /* mbed Microcontroller Library
mbed_official 87:085cde657901 2 *******************************************************************************
mbed_official 87:085cde657901 3 * Copyright (c) 2014, STMicroelectronics
mbed_official 87:085cde657901 4 * All rights reserved.
mbed_official 87:085cde657901 5 *
mbed_official 87:085cde657901 6 * Redistribution and use in source and binary forms, with or without
mbed_official 87:085cde657901 7 * modification, are permitted provided that the following conditions are met:
mbed_official 87:085cde657901 8 *
mbed_official 87:085cde657901 9 * 1. Redistributions of source code must retain the above copyright notice,
mbed_official 87:085cde657901 10 * this list of conditions and the following disclaimer.
mbed_official 87:085cde657901 11 * 2. Redistributions in binary form must reproduce the above copyright notice,
mbed_official 87:085cde657901 12 * this list of conditions and the following disclaimer in the documentation
mbed_official 87:085cde657901 13 * and/or other materials provided with the distribution.
mbed_official 87:085cde657901 14 * 3. Neither the name of STMicroelectronics nor the names of its contributors
mbed_official 87:085cde657901 15 * may be used to endorse or promote products derived from this software
mbed_official 87:085cde657901 16 * without specific prior written permission.
mbed_official 87:085cde657901 17 *
mbed_official 87:085cde657901 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
mbed_official 87:085cde657901 19 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
mbed_official 87:085cde657901 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
mbed_official 87:085cde657901 21 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
mbed_official 87:085cde657901 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
mbed_official 87:085cde657901 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
mbed_official 87:085cde657901 24 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
mbed_official 87:085cde657901 25 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
mbed_official 87:085cde657901 26 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
mbed_official 87:085cde657901 27 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
mbed_official 87:085cde657901 28 *******************************************************************************
mbed_official 87:085cde657901 29 */
mbed_official 227:7bd0639b8911 30 #include "mbed_assert.h"
mbed_official 87:085cde657901 31 #include "spi_api.h"
mbed_official 87:085cde657901 32
mbed_official 87:085cde657901 33 #if DEVICE_SPI
mbed_official 87:085cde657901 34
mbed_official 87:085cde657901 35 #include <math.h>
mbed_official 87:085cde657901 36 #include "cmsis.h"
mbed_official 87:085cde657901 37 #include "pinmap.h"
mbed_official 87:085cde657901 38
mbed_official 87:085cde657901 39 static const PinMap PinMap_SPI_MOSI[] = {
mbed_official 88:81f18c97d490 40 {PA_7, SPI_1, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF5_SPI1)},
mbed_official 115:4f0cb9cdc478 41 {PB_5, SPI_1, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF5_SPI1)},
mbed_official 172:2f4f8c56b261 42 // {PB_5, SPI_3, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF6_SPI3)},
mbed_official 115:4f0cb9cdc478 43 {PB_15, SPI_2, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF5_SPI2)},
mbed_official 125:23cc3068a9e4 44 {PC_3, SPI_2, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF5_SPI2)},
mbed_official 115:4f0cb9cdc478 45 {PC_12, SPI_3, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF6_SPI3)},
mbed_official 87:085cde657901 46 {NC, NC, 0}
mbed_official 87:085cde657901 47 };
mbed_official 87:085cde657901 48
mbed_official 87:085cde657901 49 static const PinMap PinMap_SPI_MISO[] = {
mbed_official 88:81f18c97d490 50 {PA_6, SPI_1, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF5_SPI1)},
mbed_official 115:4f0cb9cdc478 51 {PB_4, SPI_1, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF5_SPI1)},
mbed_official 172:2f4f8c56b261 52 // {PB_4, SPI_3, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF6_SPI3)},
mbed_official 115:4f0cb9cdc478 53 {PB_14, SPI_2, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF5_SPI2)},
mbed_official 125:23cc3068a9e4 54 {PC_2, SPI_2, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF5_SPI2)},
mbed_official 115:4f0cb9cdc478 55 {PC_11, SPI_3, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF6_SPI3)},
mbed_official 87:085cde657901 56 {NC, NC, 0}
mbed_official 87:085cde657901 57 };
mbed_official 87:085cde657901 58
mbed_official 87:085cde657901 59 static const PinMap PinMap_SPI_SCLK[] = {
mbed_official 88:81f18c97d490 60 {PA_5, SPI_1, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF5_SPI1)},
mbed_official 115:4f0cb9cdc478 61 {PB_3, SPI_1, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF5_SPI1)},
mbed_official 172:2f4f8c56b261 62 // {PB_3, SPI_3, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF6_SPI3)},
mbed_official 115:4f0cb9cdc478 63 {PB_10, SPI_2, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF5_SPI2)},
mbed_official 115:4f0cb9cdc478 64 {PB_13, SPI_2, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF5_SPI2)},
mbed_official 115:4f0cb9cdc478 65 {PC_10, SPI_3, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF6_SPI3)},
mbed_official 87:085cde657901 66 {NC, NC, 0}
mbed_official 87:085cde657901 67 };
mbed_official 87:085cde657901 68
mbed_official 87:085cde657901 69 static const PinMap PinMap_SPI_SSEL[] = {
mbed_official 233:1bbc1451db33 70 {PA_4, SPI_1, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_NOPULL, GPIO_AF5_SPI1)},
mbed_official 233:1bbc1451db33 71 // {PA_4, SPI_3, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_NOPULL, GPIO_AF6_SPI3)},
mbed_official 233:1bbc1451db33 72 {PA_15, SPI_1, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_NOPULL, GPIO_AF5_SPI1)},
mbed_official 233:1bbc1451db33 73 // {PA_15, SPI_3, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_NOPULL, GPIO_AF6_SPI3)},
mbed_official 233:1bbc1451db33 74 {PB_9, SPI_2, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_NOPULL, GPIO_AF5_SPI2)},
mbed_official 233:1bbc1451db33 75 {PB_12, SPI_2, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_NOPULL, GPIO_AF5_SPI2)},
mbed_official 87:085cde657901 76 {NC, NC, 0}
mbed_official 87:085cde657901 77 };
mbed_official 87:085cde657901 78
mbed_official 87:085cde657901 79 static SPI_HandleTypeDef SpiHandle;
mbed_official 87:085cde657901 80
mbed_official 402:09075a3b15e3 81 static void init_spi(spi_t *obj)
mbed_official 402:09075a3b15e3 82 {
mbed_official 87:085cde657901 83 SpiHandle.Instance = (SPI_TypeDef *)(obj->spi);
mbed_official 172:2f4f8c56b261 84
mbed_official 87:085cde657901 85 __HAL_SPI_DISABLE(&SpiHandle);
mbed_official 87:085cde657901 86
mbed_official 87:085cde657901 87 SpiHandle.Init.Mode = obj->mode;
mbed_official 87:085cde657901 88 SpiHandle.Init.BaudRatePrescaler = obj->br_presc;
mbed_official 87:085cde657901 89 SpiHandle.Init.Direction = SPI_DIRECTION_2LINES;
mbed_official 87:085cde657901 90 SpiHandle.Init.CLKPhase = obj->cpha;
mbed_official 87:085cde657901 91 SpiHandle.Init.CLKPolarity = obj->cpol;
mbed_official 87:085cde657901 92 SpiHandle.Init.CRCCalculation = SPI_CRCCALCULATION_DISABLED;
mbed_official 87:085cde657901 93 SpiHandle.Init.CRCPolynomial = 7;
mbed_official 87:085cde657901 94 SpiHandle.Init.DataSize = obj->bits;
mbed_official 87:085cde657901 95 SpiHandle.Init.FirstBit = SPI_FIRSTBIT_MSB;
mbed_official 87:085cde657901 96 SpiHandle.Init.NSS = obj->nss;
mbed_official 87:085cde657901 97 SpiHandle.Init.TIMode = SPI_TIMODE_DISABLED;
mbed_official 172:2f4f8c56b261 98
mbed_official 87:085cde657901 99 HAL_SPI_Init(&SpiHandle);
mbed_official 87:085cde657901 100
mbed_official 87:085cde657901 101 __HAL_SPI_ENABLE(&SpiHandle);
mbed_official 87:085cde657901 102 }
mbed_official 87:085cde657901 103
mbed_official 402:09075a3b15e3 104 void spi_init(spi_t *obj, PinName mosi, PinName miso, PinName sclk, PinName ssel)
mbed_official 402:09075a3b15e3 105 {
mbed_official 87:085cde657901 106 // Determine the SPI to use
mbed_official 87:085cde657901 107 SPIName spi_mosi = (SPIName)pinmap_peripheral(mosi, PinMap_SPI_MOSI);
mbed_official 87:085cde657901 108 SPIName spi_miso = (SPIName)pinmap_peripheral(miso, PinMap_SPI_MISO);
mbed_official 87:085cde657901 109 SPIName spi_sclk = (SPIName)pinmap_peripheral(sclk, PinMap_SPI_SCLK);
mbed_official 87:085cde657901 110 SPIName spi_ssel = (SPIName)pinmap_peripheral(ssel, PinMap_SPI_SSEL);
mbed_official 172:2f4f8c56b261 111
mbed_official 87:085cde657901 112 SPIName spi_data = (SPIName)pinmap_merge(spi_mosi, spi_miso);
mbed_official 87:085cde657901 113 SPIName spi_cntl = (SPIName)pinmap_merge(spi_sclk, spi_ssel);
mbed_official 172:2f4f8c56b261 114
mbed_official 87:085cde657901 115 obj->spi = (SPIName)pinmap_merge(spi_data, spi_cntl);
mbed_official 227:7bd0639b8911 116 MBED_ASSERT(obj->spi != (SPIName)NC);
mbed_official 172:2f4f8c56b261 117
mbed_official 87:085cde657901 118 // Enable SPI clock
mbed_official 87:085cde657901 119 if (obj->spi == SPI_1) {
mbed_official 87:085cde657901 120 __SPI1_CLK_ENABLE();
mbed_official 87:085cde657901 121 }
mbed_official 115:4f0cb9cdc478 122 if (obj->spi == SPI_2) {
mbed_official 115:4f0cb9cdc478 123 __SPI2_CLK_ENABLE();
mbed_official 115:4f0cb9cdc478 124 }
mbed_official 115:4f0cb9cdc478 125 if (obj->spi == SPI_3) {
mbed_official 115:4f0cb9cdc478 126 __SPI3_CLK_ENABLE();
mbed_official 115:4f0cb9cdc478 127 }
mbed_official 172:2f4f8c56b261 128
mbed_official 87:085cde657901 129 // Configure the SPI pins
mbed_official 87:085cde657901 130 pinmap_pinout(mosi, PinMap_SPI_MOSI);
mbed_official 87:085cde657901 131 pinmap_pinout(miso, PinMap_SPI_MISO);
mbed_official 87:085cde657901 132 pinmap_pinout(sclk, PinMap_SPI_SCLK);
mbed_official 172:2f4f8c56b261 133
mbed_official 87:085cde657901 134 // Save new values
mbed_official 87:085cde657901 135 obj->bits = SPI_DATASIZE_8BIT;
mbed_official 87:085cde657901 136 obj->cpol = SPI_POLARITY_LOW;
mbed_official 87:085cde657901 137 obj->cpha = SPI_PHASE_1EDGE;
mbed_official 125:23cc3068a9e4 138 obj->br_presc = SPI_BAUDRATEPRESCALER_256;
mbed_official 172:2f4f8c56b261 139
mbed_official 215:83cf97a28428 140 obj->pin_miso = miso;
mbed_official 215:83cf97a28428 141 obj->pin_mosi = mosi;
mbed_official 215:83cf97a28428 142 obj->pin_sclk = sclk;
mbed_official 215:83cf97a28428 143 obj->pin_ssel = ssel;
mbed_official 215:83cf97a28428 144
mbed_official 115:4f0cb9cdc478 145 if (ssel == NC) { // SW NSS Master mode
mbed_official 87:085cde657901 146 obj->mode = SPI_MODE_MASTER;
mbed_official 87:085cde657901 147 obj->nss = SPI_NSS_SOFT;
mbed_official 172:2f4f8c56b261 148 } else { // Slave
mbed_official 87:085cde657901 149 pinmap_pinout(ssel, PinMap_SPI_SSEL);
mbed_official 87:085cde657901 150 obj->mode = SPI_MODE_SLAVE;
mbed_official 87:085cde657901 151 obj->nss = SPI_NSS_HARD_INPUT;
mbed_official 87:085cde657901 152 }
mbed_official 87:085cde657901 153
mbed_official 87:085cde657901 154 init_spi(obj);
mbed_official 87:085cde657901 155 }
mbed_official 87:085cde657901 156
mbed_official 402:09075a3b15e3 157 void spi_free(spi_t *obj)
mbed_official 402:09075a3b15e3 158 {
mbed_official 215:83cf97a28428 159 // Reset SPI and disable clock
mbed_official 215:83cf97a28428 160 if (obj->spi == SPI_1) {
mbed_official 215:83cf97a28428 161 __SPI1_FORCE_RESET();
mbed_official 215:83cf97a28428 162 __SPI1_RELEASE_RESET();
mbed_official 215:83cf97a28428 163 __SPI1_CLK_DISABLE();
mbed_official 215:83cf97a28428 164 }
mbed_official 215:83cf97a28428 165
mbed_official 215:83cf97a28428 166 if (obj->spi == SPI_2) {
mbed_official 215:83cf97a28428 167 __SPI2_FORCE_RESET();
mbed_official 215:83cf97a28428 168 __SPI2_RELEASE_RESET();
mbed_official 215:83cf97a28428 169 __SPI2_CLK_DISABLE();
mbed_official 215:83cf97a28428 170 }
mbed_official 215:83cf97a28428 171
mbed_official 215:83cf97a28428 172 if (obj->spi == SPI_3) {
mbed_official 215:83cf97a28428 173 __SPI3_FORCE_RESET();
mbed_official 215:83cf97a28428 174 __SPI3_RELEASE_RESET();
mbed_official 215:83cf97a28428 175 __SPI3_CLK_DISABLE();
mbed_official 215:83cf97a28428 176 }
mbed_official 215:83cf97a28428 177
mbed_official 215:83cf97a28428 178 // Configure GPIOs
mbed_official 215:83cf97a28428 179 pin_function(obj->pin_miso, STM_PIN_DATA(STM_MODE_INPUT, GPIO_NOPULL, 0));
mbed_official 215:83cf97a28428 180 pin_function(obj->pin_mosi, STM_PIN_DATA(STM_MODE_INPUT, GPIO_NOPULL, 0));
mbed_official 215:83cf97a28428 181 pin_function(obj->pin_sclk, STM_PIN_DATA(STM_MODE_INPUT, GPIO_NOPULL, 0));
mbed_official 215:83cf97a28428 182 pin_function(obj->pin_ssel, STM_PIN_DATA(STM_MODE_INPUT, GPIO_NOPULL, 0));
mbed_official 87:085cde657901 183 }
mbed_official 87:085cde657901 184
mbed_official 402:09075a3b15e3 185 void spi_format(spi_t *obj, int bits, int mode, int slave)
mbed_official 402:09075a3b15e3 186 {
mbed_official 87:085cde657901 187 // Save new values
mbed_official 233:1bbc1451db33 188 if (bits == 16) {
mbed_official 233:1bbc1451db33 189 obj->bits = SPI_DATASIZE_16BIT;
mbed_official 233:1bbc1451db33 190 } else {
mbed_official 87:085cde657901 191 obj->bits = SPI_DATASIZE_8BIT;
mbed_official 87:085cde657901 192 }
mbed_official 172:2f4f8c56b261 193
mbed_official 87:085cde657901 194 switch (mode) {
mbed_official 87:085cde657901 195 case 0:
mbed_official 172:2f4f8c56b261 196 obj->cpol = SPI_POLARITY_LOW;
mbed_official 172:2f4f8c56b261 197 obj->cpha = SPI_PHASE_1EDGE;
mbed_official 172:2f4f8c56b261 198 break;
mbed_official 87:085cde657901 199 case 1:
mbed_official 172:2f4f8c56b261 200 obj->cpol = SPI_POLARITY_LOW;
mbed_official 172:2f4f8c56b261 201 obj->cpha = SPI_PHASE_2EDGE;
mbed_official 172:2f4f8c56b261 202 break;
mbed_official 87:085cde657901 203 case 2:
mbed_official 172:2f4f8c56b261 204 obj->cpol = SPI_POLARITY_HIGH;
mbed_official 172:2f4f8c56b261 205 obj->cpha = SPI_PHASE_1EDGE;
mbed_official 172:2f4f8c56b261 206 break;
mbed_official 87:085cde657901 207 default:
mbed_official 172:2f4f8c56b261 208 obj->cpol = SPI_POLARITY_HIGH;
mbed_official 172:2f4f8c56b261 209 obj->cpha = SPI_PHASE_2EDGE;
mbed_official 172:2f4f8c56b261 210 break;
mbed_official 87:085cde657901 211 }
mbed_official 172:2f4f8c56b261 212
mbed_official 87:085cde657901 213 if (slave == 0) {
mbed_official 87:085cde657901 214 obj->mode = SPI_MODE_MASTER;
mbed_official 87:085cde657901 215 obj->nss = SPI_NSS_SOFT;
mbed_official 172:2f4f8c56b261 216 } else {
mbed_official 87:085cde657901 217 obj->mode = SPI_MODE_SLAVE;
mbed_official 172:2f4f8c56b261 218 obj->nss = SPI_NSS_HARD_INPUT;
mbed_official 87:085cde657901 219 }
mbed_official 172:2f4f8c56b261 220
mbed_official 87:085cde657901 221 init_spi(obj);
mbed_official 87:085cde657901 222 }
mbed_official 87:085cde657901 223
mbed_official 402:09075a3b15e3 224 void spi_frequency(spi_t *obj, int hz)
mbed_official 402:09075a3b15e3 225 {
mbed_official 125:23cc3068a9e4 226 // Note: The frequencies are obtained with SPI1 clock = 84 MHz (APB2 clock)
mbed_official 125:23cc3068a9e4 227 if (hz < 600000) {
mbed_official 125:23cc3068a9e4 228 obj->br_presc = SPI_BAUDRATEPRESCALER_256; // 330 kHz
mbed_official 172:2f4f8c56b261 229 } else if ((hz >= 600000) && (hz < 1000000)) {
mbed_official 125:23cc3068a9e4 230 obj->br_presc = SPI_BAUDRATEPRESCALER_128; // 656 kHz
mbed_official 172:2f4f8c56b261 231 } else if ((hz >= 1000000) && (hz < 2000000)) {
mbed_official 125:23cc3068a9e4 232 obj->br_presc = SPI_BAUDRATEPRESCALER_64; // 1.3 MHz
mbed_official 172:2f4f8c56b261 233 } else if ((hz >= 2000000) && (hz < 5000000)) {
mbed_official 125:23cc3068a9e4 234 obj->br_presc = SPI_BAUDRATEPRESCALER_32; // 2.6 MHz
mbed_official 172:2f4f8c56b261 235 } else if ((hz >= 5000000) && (hz < 10000000)) {
mbed_official 125:23cc3068a9e4 236 obj->br_presc = SPI_BAUDRATEPRESCALER_16; // 5.25 MHz
mbed_official 172:2f4f8c56b261 237 } else if ((hz >= 10000000) && (hz < 21000000)) {
mbed_official 125:23cc3068a9e4 238 obj->br_presc = SPI_BAUDRATEPRESCALER_8; // 10.5 MHz
mbed_official 172:2f4f8c56b261 239 } else if ((hz >= 21000000) && (hz < 42000000)) {
mbed_official 125:23cc3068a9e4 240 obj->br_presc = SPI_BAUDRATEPRESCALER_4; // 21 MHz
mbed_official 172:2f4f8c56b261 241 } else { // >= 42000000
mbed_official 125:23cc3068a9e4 242 obj->br_presc = SPI_BAUDRATEPRESCALER_2; // 42 MHz
mbed_official 125:23cc3068a9e4 243 }
mbed_official 87:085cde657901 244 init_spi(obj);
mbed_official 87:085cde657901 245 }
mbed_official 87:085cde657901 246
mbed_official 402:09075a3b15e3 247 static inline int ssp_readable(spi_t *obj)
mbed_official 402:09075a3b15e3 248 {
mbed_official 87:085cde657901 249 int status;
mbed_official 87:085cde657901 250 SpiHandle.Instance = (SPI_TypeDef *)(obj->spi);
mbed_official 87:085cde657901 251 // Check if data is received
mbed_official 87:085cde657901 252 status = ((__HAL_SPI_GET_FLAG(&SpiHandle, SPI_FLAG_RXNE) != RESET) ? 1 : 0);
mbed_official 172:2f4f8c56b261 253 return status;
mbed_official 87:085cde657901 254 }
mbed_official 87:085cde657901 255
mbed_official 402:09075a3b15e3 256 static inline int ssp_writeable(spi_t *obj)
mbed_official 402:09075a3b15e3 257 {
mbed_official 87:085cde657901 258 int status;
mbed_official 87:085cde657901 259 SpiHandle.Instance = (SPI_TypeDef *)(obj->spi);
mbed_official 87:085cde657901 260 // Check if data is transmitted
mbed_official 87:085cde657901 261 status = ((__HAL_SPI_GET_FLAG(&SpiHandle, SPI_FLAG_TXE) != RESET) ? 1 : 0);
mbed_official 87:085cde657901 262 return status;
mbed_official 87:085cde657901 263 }
mbed_official 87:085cde657901 264
mbed_official 402:09075a3b15e3 265 static inline void ssp_write(spi_t *obj, int value)
mbed_official 402:09075a3b15e3 266 {
mbed_official 87:085cde657901 267 SPI_TypeDef *spi = (SPI_TypeDef *)(obj->spi);
mbed_official 87:085cde657901 268 while (!ssp_writeable(obj));
mbed_official 125:23cc3068a9e4 269 spi->DR = (uint16_t)value;
mbed_official 87:085cde657901 270 }
mbed_official 87:085cde657901 271
mbed_official 402:09075a3b15e3 272 static inline int ssp_read(spi_t *obj)
mbed_official 402:09075a3b15e3 273 {
mbed_official 87:085cde657901 274 SPI_TypeDef *spi = (SPI_TypeDef *)(obj->spi);
mbed_official 87:085cde657901 275 while (!ssp_readable(obj));
mbed_official 87:085cde657901 276 return (int)spi->DR;
mbed_official 87:085cde657901 277 }
mbed_official 87:085cde657901 278
mbed_official 402:09075a3b15e3 279 static inline int ssp_busy(spi_t *obj)
mbed_official 402:09075a3b15e3 280 {
mbed_official 87:085cde657901 281 int status;
mbed_official 87:085cde657901 282 SpiHandle.Instance = (SPI_TypeDef *)(obj->spi);
mbed_official 87:085cde657901 283 status = ((__HAL_SPI_GET_FLAG(&SpiHandle, SPI_FLAG_BSY) != RESET) ? 1 : 0);
mbed_official 87:085cde657901 284 return status;
mbed_official 87:085cde657901 285 }
mbed_official 87:085cde657901 286
mbed_official 402:09075a3b15e3 287 int spi_master_write(spi_t *obj, int value)
mbed_official 402:09075a3b15e3 288 {
mbed_official 87:085cde657901 289 ssp_write(obj, value);
mbed_official 87:085cde657901 290 return ssp_read(obj);
mbed_official 87:085cde657901 291 }
mbed_official 87:085cde657901 292
mbed_official 402:09075a3b15e3 293 int spi_slave_receive(spi_t *obj)
mbed_official 402:09075a3b15e3 294 {
mbed_official 233:1bbc1451db33 295 return ((ssp_readable(obj) && !ssp_busy(obj)) ? 1 : 0);
mbed_official 87:085cde657901 296 };
mbed_official 87:085cde657901 297
mbed_official 402:09075a3b15e3 298 int spi_slave_read(spi_t *obj)
mbed_official 402:09075a3b15e3 299 {
mbed_official 87:085cde657901 300 SPI_TypeDef *spi = (SPI_TypeDef *)(obj->spi);
mbed_official 172:2f4f8c56b261 301 while (!ssp_readable(obj));
mbed_official 87:085cde657901 302 return (int)spi->DR;
mbed_official 87:085cde657901 303 }
mbed_official 87:085cde657901 304
mbed_official 402:09075a3b15e3 305 void spi_slave_write(spi_t *obj, int value)
mbed_official 402:09075a3b15e3 306 {
mbed_official 87:085cde657901 307 SPI_TypeDef *spi = (SPI_TypeDef *)(obj->spi);
mbed_official 87:085cde657901 308 while (!ssp_writeable(obj));
mbed_official 125:23cc3068a9e4 309 spi->DR = (uint16_t)value;
mbed_official 87:085cde657901 310 }
mbed_official 87:085cde657901 311
mbed_official 402:09075a3b15e3 312 int spi_busy(spi_t *obj)
mbed_official 402:09075a3b15e3 313 {
mbed_official 87:085cde657901 314 return ssp_busy(obj);
mbed_official 87:085cde657901 315 }
mbed_official 87:085cde657901 316
mbed_official 87:085cde657901 317 #endif