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Superseded

This library was superseded by mbed-dev - https://os.mbed.com/users/mbed_official/code/mbed-dev/.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@274:6937b19af361, 2014-08-06 (annotated)

Committer:
mbed_official
Date:
Wed Aug 06 08:15:07 2014 +0100
Revision:
274:6937b19af361
Parent:
233:1bbc1451db33
Child:
402:09075a3b15e3
Synchronized with git revision 5b145e4f6c509376173c3ea2aa35a6da879a2124



Full URL: https://github.com/mbedmicro/mbed/commit/5b145e4f6c509376173c3ea2aa35a6da879a2124/



[TARGET_LPC11UXX] PeripheralNames.h and PinMap definitions separation for LPC11UXX platforms

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 87:085cde657901 81 static void init_spi(spi_t *obj) {
mbed_official 87:085cde657901 82 SpiHandle.Instance = (SPI_TypeDef *)(obj->spi);
mbed_official 172:2f4f8c56b261 83
mbed_official 87:085cde657901 84 __HAL_SPI_DISABLE(&SpiHandle);
mbed_official 87:085cde657901 85
mbed_official 87:085cde657901 86 SpiHandle.Init.Mode = obj->mode;
mbed_official 87:085cde657901 87 SpiHandle.Init.BaudRatePrescaler = obj->br_presc;
mbed_official 87:085cde657901 88 SpiHandle.Init.Direction = SPI_DIRECTION_2LINES;
mbed_official 87:085cde657901 89 SpiHandle.Init.CLKPhase = obj->cpha;
mbed_official 87:085cde657901 90 SpiHandle.Init.CLKPolarity = obj->cpol;
mbed_official 87:085cde657901 91 SpiHandle.Init.CRCCalculation = SPI_CRCCALCULATION_DISABLED;
mbed_official 87:085cde657901 92 SpiHandle.Init.CRCPolynomial = 7;
mbed_official 87:085cde657901 93 SpiHandle.Init.DataSize = obj->bits;
mbed_official 87:085cde657901 94 SpiHandle.Init.FirstBit = SPI_FIRSTBIT_MSB;
mbed_official 87:085cde657901 95 SpiHandle.Init.NSS = obj->nss;
mbed_official 87:085cde657901 96 SpiHandle.Init.TIMode = SPI_TIMODE_DISABLED;
mbed_official 172:2f4f8c56b261 97
mbed_official 87:085cde657901 98 HAL_SPI_Init(&SpiHandle);
mbed_official 87:085cde657901 99
mbed_official 87:085cde657901 100 __HAL_SPI_ENABLE(&SpiHandle);
mbed_official 87:085cde657901 101 }
mbed_official 87:085cde657901 102
mbed_official 87:085cde657901 103 void spi_init(spi_t *obj, PinName mosi, PinName miso, PinName sclk, PinName ssel) {
mbed_official 87:085cde657901 104 // Determine the SPI to use
mbed_official 87:085cde657901 105 SPIName spi_mosi = (SPIName)pinmap_peripheral(mosi, PinMap_SPI_MOSI);
mbed_official 87:085cde657901 106 SPIName spi_miso = (SPIName)pinmap_peripheral(miso, PinMap_SPI_MISO);
mbed_official 87:085cde657901 107 SPIName spi_sclk = (SPIName)pinmap_peripheral(sclk, PinMap_SPI_SCLK);
mbed_official 87:085cde657901 108 SPIName spi_ssel = (SPIName)pinmap_peripheral(ssel, PinMap_SPI_SSEL);
mbed_official 172:2f4f8c56b261 109
mbed_official 87:085cde657901 110 SPIName spi_data = (SPIName)pinmap_merge(spi_mosi, spi_miso);
mbed_official 87:085cde657901 111 SPIName spi_cntl = (SPIName)pinmap_merge(spi_sclk, spi_ssel);
mbed_official 172:2f4f8c56b261 112
mbed_official 87:085cde657901 113 obj->spi = (SPIName)pinmap_merge(spi_data, spi_cntl);
mbed_official 227:7bd0639b8911 114 MBED_ASSERT(obj->spi != (SPIName)NC);
mbed_official 172:2f4f8c56b261 115
mbed_official 87:085cde657901 116 // Enable SPI clock
mbed_official 87:085cde657901 117 if (obj->spi == SPI_1) {
mbed_official 87:085cde657901 118 __SPI1_CLK_ENABLE();
mbed_official 87:085cde657901 119 }
mbed_official 115:4f0cb9cdc478 120 if (obj->spi == SPI_2) {
mbed_official 115:4f0cb9cdc478 121 __SPI2_CLK_ENABLE();
mbed_official 115:4f0cb9cdc478 122 }
mbed_official 115:4f0cb9cdc478 123 if (obj->spi == SPI_3) {
mbed_official 115:4f0cb9cdc478 124 __SPI3_CLK_ENABLE();
mbed_official 115:4f0cb9cdc478 125 }
mbed_official 172:2f4f8c56b261 126
mbed_official 87:085cde657901 127 // Configure the SPI pins
mbed_official 87:085cde657901 128 pinmap_pinout(mosi, PinMap_SPI_MOSI);
mbed_official 87:085cde657901 129 pinmap_pinout(miso, PinMap_SPI_MISO);
mbed_official 87:085cde657901 130 pinmap_pinout(sclk, PinMap_SPI_SCLK);
mbed_official 172:2f4f8c56b261 131
mbed_official 87:085cde657901 132 // Save new values
mbed_official 87:085cde657901 133 obj->bits = SPI_DATASIZE_8BIT;
mbed_official 87:085cde657901 134 obj->cpol = SPI_POLARITY_LOW;
mbed_official 87:085cde657901 135 obj->cpha = SPI_PHASE_1EDGE;
mbed_official 125:23cc3068a9e4 136 obj->br_presc = SPI_BAUDRATEPRESCALER_256;
mbed_official 172:2f4f8c56b261 137
mbed_official 215:83cf97a28428 138 obj->pin_miso = miso;
mbed_official 215:83cf97a28428 139 obj->pin_mosi = mosi;
mbed_official 215:83cf97a28428 140 obj->pin_sclk = sclk;
mbed_official 215:83cf97a28428 141 obj->pin_ssel = ssel;
mbed_official 215:83cf97a28428 142
mbed_official 115:4f0cb9cdc478 143 if (ssel == NC) { // SW NSS Master mode
mbed_official 87:085cde657901 144 obj->mode = SPI_MODE_MASTER;
mbed_official 87:085cde657901 145 obj->nss = SPI_NSS_SOFT;
mbed_official 172:2f4f8c56b261 146 } else { // Slave
mbed_official 87:085cde657901 147 pinmap_pinout(ssel, PinMap_SPI_SSEL);
mbed_official 87:085cde657901 148 obj->mode = SPI_MODE_SLAVE;
mbed_official 87:085cde657901 149 obj->nss = SPI_NSS_HARD_INPUT;
mbed_official 87:085cde657901 150 }
mbed_official 87:085cde657901 151
mbed_official 87:085cde657901 152 init_spi(obj);
mbed_official 87:085cde657901 153 }
mbed_official 87:085cde657901 154
mbed_official 87:085cde657901 155 void spi_free(spi_t *obj) {
mbed_official 215:83cf97a28428 156 // Reset SPI and disable clock
mbed_official 215:83cf97a28428 157 if (obj->spi == SPI_1) {
mbed_official 215:83cf97a28428 158 __SPI1_FORCE_RESET();
mbed_official 215:83cf97a28428 159 __SPI1_RELEASE_RESET();
mbed_official 215:83cf97a28428 160 __SPI1_CLK_DISABLE();
mbed_official 215:83cf97a28428 161 }
mbed_official 215:83cf97a28428 162
mbed_official 215:83cf97a28428 163 if (obj->spi == SPI_2) {
mbed_official 215:83cf97a28428 164 __SPI2_FORCE_RESET();
mbed_official 215:83cf97a28428 165 __SPI2_RELEASE_RESET();
mbed_official 215:83cf97a28428 166 __SPI2_CLK_DISABLE();
mbed_official 215:83cf97a28428 167 }
mbed_official 215:83cf97a28428 168
mbed_official 215:83cf97a28428 169 if (obj->spi == SPI_3) {
mbed_official 215:83cf97a28428 170 __SPI3_FORCE_RESET();
mbed_official 215:83cf97a28428 171 __SPI3_RELEASE_RESET();
mbed_official 215:83cf97a28428 172 __SPI3_CLK_DISABLE();
mbed_official 215:83cf97a28428 173 }
mbed_official 215:83cf97a28428 174
mbed_official 215:83cf97a28428 175 // Configure GPIOs
mbed_official 215:83cf97a28428 176 pin_function(obj->pin_miso, STM_PIN_DATA(STM_MODE_INPUT, GPIO_NOPULL, 0));
mbed_official 215:83cf97a28428 177 pin_function(obj->pin_mosi, STM_PIN_DATA(STM_MODE_INPUT, GPIO_NOPULL, 0));
mbed_official 215:83cf97a28428 178 pin_function(obj->pin_sclk, STM_PIN_DATA(STM_MODE_INPUT, GPIO_NOPULL, 0));
mbed_official 215:83cf97a28428 179 pin_function(obj->pin_ssel, STM_PIN_DATA(STM_MODE_INPUT, GPIO_NOPULL, 0));
mbed_official 87:085cde657901 180 }
mbed_official 87:085cde657901 181
mbed_official 172:2f4f8c56b261 182 void spi_format(spi_t *obj, int bits, int mode, int slave) {
mbed_official 87:085cde657901 183 // Save new values
mbed_official 233:1bbc1451db33 184 if (bits == 16) {
mbed_official 233:1bbc1451db33 185 obj->bits = SPI_DATASIZE_16BIT;
mbed_official 233:1bbc1451db33 186 } else {
mbed_official 87:085cde657901 187 obj->bits = SPI_DATASIZE_8BIT;
mbed_official 87:085cde657901 188 }
mbed_official 172:2f4f8c56b261 189
mbed_official 87:085cde657901 190 switch (mode) {
mbed_official 87:085cde657901 191 case 0:
mbed_official 172:2f4f8c56b261 192 obj->cpol = SPI_POLARITY_LOW;
mbed_official 172:2f4f8c56b261 193 obj->cpha = SPI_PHASE_1EDGE;
mbed_official 172:2f4f8c56b261 194 break;
mbed_official 87:085cde657901 195 case 1:
mbed_official 172:2f4f8c56b261 196 obj->cpol = SPI_POLARITY_LOW;
mbed_official 172:2f4f8c56b261 197 obj->cpha = SPI_PHASE_2EDGE;
mbed_official 172:2f4f8c56b261 198 break;
mbed_official 87:085cde657901 199 case 2:
mbed_official 172:2f4f8c56b261 200 obj->cpol = SPI_POLARITY_HIGH;
mbed_official 172:2f4f8c56b261 201 obj->cpha = SPI_PHASE_1EDGE;
mbed_official 172:2f4f8c56b261 202 break;
mbed_official 87:085cde657901 203 default:
mbed_official 172:2f4f8c56b261 204 obj->cpol = SPI_POLARITY_HIGH;
mbed_official 172:2f4f8c56b261 205 obj->cpha = SPI_PHASE_2EDGE;
mbed_official 172:2f4f8c56b261 206 break;
mbed_official 87:085cde657901 207 }
mbed_official 172:2f4f8c56b261 208
mbed_official 87:085cde657901 209 if (slave == 0) {
mbed_official 87:085cde657901 210 obj->mode = SPI_MODE_MASTER;
mbed_official 87:085cde657901 211 obj->nss = SPI_NSS_SOFT;
mbed_official 172:2f4f8c56b261 212 } else {
mbed_official 87:085cde657901 213 obj->mode = SPI_MODE_SLAVE;
mbed_official 172:2f4f8c56b261 214 obj->nss = SPI_NSS_HARD_INPUT;
mbed_official 87:085cde657901 215 }
mbed_official 172:2f4f8c56b261 216
mbed_official 87:085cde657901 217 init_spi(obj);
mbed_official 87:085cde657901 218 }
mbed_official 87:085cde657901 219
mbed_official 87:085cde657901 220 void spi_frequency(spi_t *obj, int hz) {
mbed_official 125:23cc3068a9e4 221 // Note: The frequencies are obtained with SPI1 clock = 84 MHz (APB2 clock)
mbed_official 125:23cc3068a9e4 222 if (hz < 600000) {
mbed_official 125:23cc3068a9e4 223 obj->br_presc = SPI_BAUDRATEPRESCALER_256; // 330 kHz
mbed_official 172:2f4f8c56b261 224 } else if ((hz >= 600000) && (hz < 1000000)) {
mbed_official 125:23cc3068a9e4 225 obj->br_presc = SPI_BAUDRATEPRESCALER_128; // 656 kHz
mbed_official 172:2f4f8c56b261 226 } else if ((hz >= 1000000) && (hz < 2000000)) {
mbed_official 125:23cc3068a9e4 227 obj->br_presc = SPI_BAUDRATEPRESCALER_64; // 1.3 MHz
mbed_official 172:2f4f8c56b261 228 } else if ((hz >= 2000000) && (hz < 5000000)) {
mbed_official 125:23cc3068a9e4 229 obj->br_presc = SPI_BAUDRATEPRESCALER_32; // 2.6 MHz
mbed_official 172:2f4f8c56b261 230 } else if ((hz >= 5000000) && (hz < 10000000)) {
mbed_official 125:23cc3068a9e4 231 obj->br_presc = SPI_BAUDRATEPRESCALER_16; // 5.25 MHz
mbed_official 172:2f4f8c56b261 232 } else if ((hz >= 10000000) && (hz < 21000000)) {
mbed_official 125:23cc3068a9e4 233 obj->br_presc = SPI_BAUDRATEPRESCALER_8; // 10.5 MHz
mbed_official 172:2f4f8c56b261 234 } else if ((hz >= 21000000) && (hz < 42000000)) {
mbed_official 125:23cc3068a9e4 235 obj->br_presc = SPI_BAUDRATEPRESCALER_4; // 21 MHz
mbed_official 172:2f4f8c56b261 236 } else { // >= 42000000
mbed_official 125:23cc3068a9e4 237 obj->br_presc = SPI_BAUDRATEPRESCALER_2; // 42 MHz
mbed_official 125:23cc3068a9e4 238 }
mbed_official 87:085cde657901 239 init_spi(obj);
mbed_official 87:085cde657901 240 }
mbed_official 87:085cde657901 241
mbed_official 87:085cde657901 242 static inline int ssp_readable(spi_t *obj) {
mbed_official 87:085cde657901 243 int status;
mbed_official 87:085cde657901 244 SpiHandle.Instance = (SPI_TypeDef *)(obj->spi);
mbed_official 87:085cde657901 245 // Check if data is received
mbed_official 87:085cde657901 246 status = ((__HAL_SPI_GET_FLAG(&SpiHandle, SPI_FLAG_RXNE) != RESET) ? 1 : 0);
mbed_official 172:2f4f8c56b261 247 return status;
mbed_official 87:085cde657901 248 }
mbed_official 87:085cde657901 249
mbed_official 87:085cde657901 250 static inline int ssp_writeable(spi_t *obj) {
mbed_official 87:085cde657901 251 int status;
mbed_official 87:085cde657901 252 SpiHandle.Instance = (SPI_TypeDef *)(obj->spi);
mbed_official 87:085cde657901 253 // Check if data is transmitted
mbed_official 87:085cde657901 254 status = ((__HAL_SPI_GET_FLAG(&SpiHandle, SPI_FLAG_TXE) != RESET) ? 1 : 0);
mbed_official 87:085cde657901 255 return status;
mbed_official 87:085cde657901 256 }
mbed_official 87:085cde657901 257
mbed_official 87:085cde657901 258 static inline void ssp_write(spi_t *obj, int value) {
mbed_official 87:085cde657901 259 SPI_TypeDef *spi = (SPI_TypeDef *)(obj->spi);
mbed_official 87:085cde657901 260 while (!ssp_writeable(obj));
mbed_official 125:23cc3068a9e4 261 spi->DR = (uint16_t)value;
mbed_official 87:085cde657901 262 }
mbed_official 87:085cde657901 263
mbed_official 87:085cde657901 264 static inline int ssp_read(spi_t *obj) {
mbed_official 87:085cde657901 265 SPI_TypeDef *spi = (SPI_TypeDef *)(obj->spi);
mbed_official 87:085cde657901 266 while (!ssp_readable(obj));
mbed_official 87:085cde657901 267 return (int)spi->DR;
mbed_official 87:085cde657901 268 }
mbed_official 87:085cde657901 269
mbed_official 87:085cde657901 270 static inline int ssp_busy(spi_t *obj) {
mbed_official 87:085cde657901 271 int status;
mbed_official 87:085cde657901 272 SpiHandle.Instance = (SPI_TypeDef *)(obj->spi);
mbed_official 87:085cde657901 273 status = ((__HAL_SPI_GET_FLAG(&SpiHandle, SPI_FLAG_BSY) != RESET) ? 1 : 0);
mbed_official 87:085cde657901 274 return status;
mbed_official 87:085cde657901 275 }
mbed_official 87:085cde657901 276
mbed_official 87:085cde657901 277 int spi_master_write(spi_t *obj, int value) {
mbed_official 87:085cde657901 278 ssp_write(obj, value);
mbed_official 87:085cde657901 279 return ssp_read(obj);
mbed_official 87:085cde657901 280 }
mbed_official 87:085cde657901 281
mbed_official 87:085cde657901 282 int spi_slave_receive(spi_t *obj) {
mbed_official 233:1bbc1451db33 283 return ((ssp_readable(obj) && !ssp_busy(obj)) ? 1 : 0);
mbed_official 87:085cde657901 284 };
mbed_official 87:085cde657901 285
mbed_official 87:085cde657901 286 int spi_slave_read(spi_t *obj) {
mbed_official 87:085cde657901 287 SPI_TypeDef *spi = (SPI_TypeDef *)(obj->spi);
mbed_official 172:2f4f8c56b261 288 while (!ssp_readable(obj));
mbed_official 87:085cde657901 289 return (int)spi->DR;
mbed_official 87:085cde657901 290 }
mbed_official 87:085cde657901 291
mbed_official 87:085cde657901 292 void spi_slave_write(spi_t *obj, int value) {
mbed_official 87:085cde657901 293 SPI_TypeDef *spi = (SPI_TypeDef *)(obj->spi);
mbed_official 87:085cde657901 294 while (!ssp_writeable(obj));
mbed_official 125:23cc3068a9e4 295 spi->DR = (uint16_t)value;
mbed_official 87:085cde657901 296 }
mbed_official 87:085cde657901 297
mbed_official 87:085cde657901 298 int spi_busy(spi_t *obj) {
mbed_official 87:085cde657901 299 return ssp_busy(obj);
mbed_official 87:085cde657901 300 }
mbed_official 87:085cde657901 301
mbed_official 87:085cde657901 302 #endif