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api_source/spi_api.c@639:b32fded6b0ae, 2016-09-27 (annotated)

Committer:
floatlei
Date:
Tue Sep 27 09:40:53 2016 +0000
Revision:
639:b32fded6b0ae
Parent:
targets/hal/TARGET_STM/TARGET_STM32L0/spi_api.c@552:a1b9575155a3 
sf

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 181:a4cbdfbbd2f4 1 /* mbed Microcontroller Library
mbed_official 181:a4cbdfbbd2f4 2 *******************************************************************************
mbed_official 531:47d2b67c511f 3 * Copyright (c) 2015, STMicroelectronics
mbed_official 181:a4cbdfbbd2f4 4 * All rights reserved.
mbed_official 181:a4cbdfbbd2f4 5 *
mbed_official 181:a4cbdfbbd2f4 6 * Redistribution and use in source and binary forms, with or without
mbed_official 181:a4cbdfbbd2f4 7 * modification, are permitted provided that the following conditions are met:
mbed_official 181:a4cbdfbbd2f4 8 *
mbed_official 181:a4cbdfbbd2f4 9 * 1. Redistributions of source code must retain the above copyright notice,
mbed_official 181:a4cbdfbbd2f4 10 * this list of conditions and the following disclaimer.
mbed_official 181:a4cbdfbbd2f4 11 * 2. Redistributions in binary form must reproduce the above copyright notice,
mbed_official 181:a4cbdfbbd2f4 12 * this list of conditions and the following disclaimer in the documentation
mbed_official 181:a4cbdfbbd2f4 13 * and/or other materials provided with the distribution.
mbed_official 181:a4cbdfbbd2f4 14 * 3. Neither the name of STMicroelectronics nor the names of its contributors
mbed_official 181:a4cbdfbbd2f4 15 * may be used to endorse or promote products derived from this software
mbed_official 181:a4cbdfbbd2f4 16 * without specific prior written permission.
mbed_official 181:a4cbdfbbd2f4 17 *
mbed_official 181:a4cbdfbbd2f4 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
mbed_official 181:a4cbdfbbd2f4 19 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
mbed_official 181:a4cbdfbbd2f4 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
mbed_official 181:a4cbdfbbd2f4 21 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
mbed_official 181:a4cbdfbbd2f4 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
mbed_official 181:a4cbdfbbd2f4 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
mbed_official 181:a4cbdfbbd2f4 24 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
mbed_official 181:a4cbdfbbd2f4 25 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
mbed_official 181:a4cbdfbbd2f4 26 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
mbed_official 181:a4cbdfbbd2f4 27 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
mbed_official 181:a4cbdfbbd2f4 28 *******************************************************************************
mbed_official 181:a4cbdfbbd2f4 29 */
mbed_official 227:7bd0639b8911 30 #include "mbed_assert.h"
mbed_official 181:a4cbdfbbd2f4 31 #include "spi_api.h"
mbed_official 181:a4cbdfbbd2f4 32
mbed_official 181:a4cbdfbbd2f4 33 #if DEVICE_SPI
mbed_official 181:a4cbdfbbd2f4 34
mbed_official 181:a4cbdfbbd2f4 35 #include <math.h>
mbed_official 181:a4cbdfbbd2f4 36 #include "cmsis.h"
mbed_official 181:a4cbdfbbd2f4 37 #include "pinmap.h"
mbed_official 531:47d2b67c511f 38 #include "mbed_error.h"
mbed_official 414:4ec4c5b614b0 39 #include "PeripheralPins.h"
mbed_official 181:a4cbdfbbd2f4 40
mbed_official 181:a4cbdfbbd2f4 41 static SPI_HandleTypeDef SpiHandle;
mbed_official 181:a4cbdfbbd2f4 42
mbed_official 402:09075a3b15e3 43 static void init_spi(spi_t *obj)
mbed_official 402:09075a3b15e3 44 {
mbed_official 181:a4cbdfbbd2f4 45 SpiHandle.Instance = (SPI_TypeDef *)(obj->spi);
mbed_official 181:a4cbdfbbd2f4 46
mbed_official 181:a4cbdfbbd2f4 47 __HAL_SPI_DISABLE(&SpiHandle);
mbed_official 181:a4cbdfbbd2f4 48
mbed_official 181:a4cbdfbbd2f4 49 SpiHandle.Init.Mode = obj->mode;
mbed_official 181:a4cbdfbbd2f4 50 SpiHandle.Init.BaudRatePrescaler = obj->br_presc;
mbed_official 181:a4cbdfbbd2f4 51 SpiHandle.Init.Direction = SPI_DIRECTION_2LINES;
mbed_official 181:a4cbdfbbd2f4 52 SpiHandle.Init.CLKPhase = obj->cpha;
mbed_official 181:a4cbdfbbd2f4 53 SpiHandle.Init.CLKPolarity = obj->cpol;
mbed_official 181:a4cbdfbbd2f4 54 SpiHandle.Init.CRCCalculation = SPI_CRCCALCULATION_DISABLED;
mbed_official 181:a4cbdfbbd2f4 55 SpiHandle.Init.CRCPolynomial = 7;
mbed_official 181:a4cbdfbbd2f4 56 SpiHandle.Init.DataSize = obj->bits;
mbed_official 181:a4cbdfbbd2f4 57 SpiHandle.Init.FirstBit = SPI_FIRSTBIT_MSB;
mbed_official 181:a4cbdfbbd2f4 58 SpiHandle.Init.NSS = obj->nss;
mbed_official 181:a4cbdfbbd2f4 59 SpiHandle.Init.TIMode = SPI_TIMODE_DISABLED;
mbed_official 181:a4cbdfbbd2f4 60
mbed_official 531:47d2b67c511f 61 if (HAL_SPI_Init(&SpiHandle) != HAL_OK) {
mbed_official 531:47d2b67c511f 62 error("Cannot initialize SPI");
mbed_official 531:47d2b67c511f 63 }
mbed_official 181:a4cbdfbbd2f4 64
mbed_official 181:a4cbdfbbd2f4 65 __HAL_SPI_ENABLE(&SpiHandle);
mbed_official 181:a4cbdfbbd2f4 66 }
mbed_official 181:a4cbdfbbd2f4 67
mbed_official 402:09075a3b15e3 68 void spi_init(spi_t *obj, PinName mosi, PinName miso, PinName sclk, PinName ssel)
mbed_official 402:09075a3b15e3 69 {
mbed_official 181:a4cbdfbbd2f4 70 // Determine the SPI to use
mbed_official 181:a4cbdfbbd2f4 71 SPIName spi_mosi = (SPIName)pinmap_peripheral(mosi, PinMap_SPI_MOSI);
mbed_official 181:a4cbdfbbd2f4 72 SPIName spi_miso = (SPIName)pinmap_peripheral(miso, PinMap_SPI_MISO);
mbed_official 181:a4cbdfbbd2f4 73 SPIName spi_sclk = (SPIName)pinmap_peripheral(sclk, PinMap_SPI_SCLK);
mbed_official 181:a4cbdfbbd2f4 74 SPIName spi_ssel = (SPIName)pinmap_peripheral(ssel, PinMap_SPI_SSEL);
mbed_official 181:a4cbdfbbd2f4 75
mbed_official 181:a4cbdfbbd2f4 76 SPIName spi_data = (SPIName)pinmap_merge(spi_mosi, spi_miso);
mbed_official 181:a4cbdfbbd2f4 77 SPIName spi_cntl = (SPIName)pinmap_merge(spi_sclk, spi_ssel);
mbed_official 181:a4cbdfbbd2f4 78
mbed_official 181:a4cbdfbbd2f4 79 obj->spi = (SPIName)pinmap_merge(spi_data, spi_cntl);
mbed_official 227:7bd0639b8911 80 MBED_ASSERT(obj->spi != (SPIName)NC);
mbed_official 181:a4cbdfbbd2f4 81
mbed_official 181:a4cbdfbbd2f4 82 // Enable SPI clock
mbed_official 181:a4cbdfbbd2f4 83 if (obj->spi == SPI_1) {
mbed_official 181:a4cbdfbbd2f4 84 __SPI1_CLK_ENABLE();
mbed_official 181:a4cbdfbbd2f4 85 }
mbed_official 181:a4cbdfbbd2f4 86 if (obj->spi == SPI_2) {
mbed_official 181:a4cbdfbbd2f4 87 __SPI2_CLK_ENABLE();
mbed_official 181:a4cbdfbbd2f4 88 }
mbed_official 181:a4cbdfbbd2f4 89
mbed_official 181:a4cbdfbbd2f4 90 // Configure the SPI pins
mbed_official 181:a4cbdfbbd2f4 91 pinmap_pinout(mosi, PinMap_SPI_MOSI);
mbed_official 181:a4cbdfbbd2f4 92 pinmap_pinout(miso, PinMap_SPI_MISO);
mbed_official 181:a4cbdfbbd2f4 93 pinmap_pinout(sclk, PinMap_SPI_SCLK);
mbed_official 181:a4cbdfbbd2f4 94
mbed_official 181:a4cbdfbbd2f4 95 // Save new values
mbed_official 181:a4cbdfbbd2f4 96 obj->bits = SPI_DATASIZE_8BIT;
mbed_official 181:a4cbdfbbd2f4 97 obj->cpol = SPI_POLARITY_LOW;
mbed_official 181:a4cbdfbbd2f4 98 obj->cpha = SPI_PHASE_1EDGE;
mbed_official 181:a4cbdfbbd2f4 99 obj->br_presc = SPI_BAUDRATEPRESCALER_256;
mbed_official 181:a4cbdfbbd2f4 100
mbed_official 211:fb8edfff6ae1 101 obj->pin_miso = miso;
mbed_official 211:fb8edfff6ae1 102 obj->pin_mosi = mosi;
mbed_official 211:fb8edfff6ae1 103 obj->pin_sclk = sclk;
mbed_official 211:fb8edfff6ae1 104 obj->pin_ssel = ssel;
mbed_official 211:fb8edfff6ae1 105
mbed_official 552:a1b9575155a3 106 if (ssel != NC) {
mbed_official 552:a1b9575155a3 107 pinmap_pinout(ssel, PinMap_SPI_SSEL);
mbed_official 552:a1b9575155a3 108 } else {
mbed_official 181:a4cbdfbbd2f4 109 obj->nss = SPI_NSS_SOFT;
mbed_official 181:a4cbdfbbd2f4 110 }
mbed_official 181:a4cbdfbbd2f4 111
mbed_official 181:a4cbdfbbd2f4 112 init_spi(obj);
mbed_official 181:a4cbdfbbd2f4 113 }
mbed_official 181:a4cbdfbbd2f4 114
mbed_official 402:09075a3b15e3 115 void spi_free(spi_t *obj)
mbed_official 402:09075a3b15e3 116 {
mbed_official 201:fa203361dc70 117 // Reset SPI and disable clock
mbed_official 201:fa203361dc70 118 if (obj->spi == SPI_1) {
mbed_official 201:fa203361dc70 119 __SPI1_FORCE_RESET();
mbed_official 201:fa203361dc70 120 __SPI1_RELEASE_RESET();
mbed_official 201:fa203361dc70 121 __SPI1_CLK_DISABLE();
mbed_official 201:fa203361dc70 122 }
mbed_official 201:fa203361dc70 123
mbed_official 201:fa203361dc70 124 if (obj->spi == SPI_2) {
mbed_official 201:fa203361dc70 125 __SPI2_FORCE_RESET();
mbed_official 201:fa203361dc70 126 __SPI2_RELEASE_RESET();
mbed_official 201:fa203361dc70 127 __SPI2_CLK_DISABLE();
mbed_official 201:fa203361dc70 128 }
mbed_official 201:fa203361dc70 129
mbed_official 201:fa203361dc70 130 // Configure GPIO
mbed_official 201:fa203361dc70 131 pin_function(obj->pin_miso, STM_PIN_DATA(STM_MODE_INPUT, GPIO_NOPULL, 0));
mbed_official 201:fa203361dc70 132 pin_function(obj->pin_mosi, STM_PIN_DATA(STM_MODE_INPUT, GPIO_NOPULL, 0));
mbed_official 201:fa203361dc70 133 pin_function(obj->pin_sclk, STM_PIN_DATA(STM_MODE_INPUT, GPIO_NOPULL, 0));
mbed_official 201:fa203361dc70 134 pin_function(obj->pin_ssel, STM_PIN_DATA(STM_MODE_INPUT, GPIO_NOPULL, 0));
mbed_official 181:a4cbdfbbd2f4 135 }
mbed_official 181:a4cbdfbbd2f4 136
mbed_official 402:09075a3b15e3 137 void spi_format(spi_t *obj, int bits, int mode, int slave)
mbed_official 402:09075a3b15e3 138 {
mbed_official 181:a4cbdfbbd2f4 139 // Save new values
mbed_official 233:1bbc1451db33 140 if (bits == 16) {
mbed_official 233:1bbc1451db33 141 obj->bits = SPI_DATASIZE_16BIT;
mbed_official 233:1bbc1451db33 142 } else {
mbed_official 181:a4cbdfbbd2f4 143 obj->bits = SPI_DATASIZE_8BIT;
mbed_official 181:a4cbdfbbd2f4 144 }
mbed_official 181:a4cbdfbbd2f4 145
mbed_official 181:a4cbdfbbd2f4 146 switch (mode) {
mbed_official 181:a4cbdfbbd2f4 147 case 0:
mbed_official 181:a4cbdfbbd2f4 148 obj->cpol = SPI_POLARITY_LOW;
mbed_official 181:a4cbdfbbd2f4 149 obj->cpha = SPI_PHASE_1EDGE;
mbed_official 181:a4cbdfbbd2f4 150 break;
mbed_official 181:a4cbdfbbd2f4 151 case 1:
mbed_official 181:a4cbdfbbd2f4 152 obj->cpol = SPI_POLARITY_LOW;
mbed_official 181:a4cbdfbbd2f4 153 obj->cpha = SPI_PHASE_2EDGE;
mbed_official 181:a4cbdfbbd2f4 154 break;
mbed_official 181:a4cbdfbbd2f4 155 case 2:
mbed_official 181:a4cbdfbbd2f4 156 obj->cpol = SPI_POLARITY_HIGH;
mbed_official 181:a4cbdfbbd2f4 157 obj->cpha = SPI_PHASE_1EDGE;
mbed_official 181:a4cbdfbbd2f4 158 break;
mbed_official 181:a4cbdfbbd2f4 159 default:
mbed_official 181:a4cbdfbbd2f4 160 obj->cpol = SPI_POLARITY_HIGH;
mbed_official 181:a4cbdfbbd2f4 161 obj->cpha = SPI_PHASE_2EDGE;
mbed_official 181:a4cbdfbbd2f4 162 break;
mbed_official 181:a4cbdfbbd2f4 163 }
mbed_official 181:a4cbdfbbd2f4 164
mbed_official 552:a1b9575155a3 165 if (obj->nss != SPI_NSS_SOFT) {
mbed_official 552:a1b9575155a3 166 obj->nss = (slave) ? SPI_NSS_HARD_INPUT : SPI_NSS_HARD_OUTPUT;
mbed_official 181:a4cbdfbbd2f4 167 }
mbed_official 181:a4cbdfbbd2f4 168
mbed_official 552:a1b9575155a3 169 obj->mode = (slave) ? SPI_MODE_SLAVE : SPI_MODE_MASTER;
mbed_official 552:a1b9575155a3 170
mbed_official 181:a4cbdfbbd2f4 171 init_spi(obj);
mbed_official 181:a4cbdfbbd2f4 172 }
mbed_official 181:a4cbdfbbd2f4 173
mbed_official 402:09075a3b15e3 174 void spi_frequency(spi_t *obj, int hz)
mbed_official 402:09075a3b15e3 175 {
mbed_official 181:a4cbdfbbd2f4 176 // Note: The frequencies are obtained with SPI1 clock = 32 MHz (APB2 clock)
mbed_official 181:a4cbdfbbd2f4 177 if (hz < 250000) {
mbed_official 181:a4cbdfbbd2f4 178 obj->br_presc = SPI_BAUDRATEPRESCALER_256; // 125 kHz
mbed_official 181:a4cbdfbbd2f4 179 } else if ((hz >= 250000) && (hz < 500000)) {
mbed_official 181:a4cbdfbbd2f4 180 obj->br_presc = SPI_BAUDRATEPRESCALER_128; // 250 kHz
mbed_official 181:a4cbdfbbd2f4 181 } else if ((hz >= 500000) && (hz < 1000000)) {
mbed_official 181:a4cbdfbbd2f4 182 obj->br_presc = SPI_BAUDRATEPRESCALER_64; // 500 kHz
mbed_official 181:a4cbdfbbd2f4 183 } else if ((hz >= 1000000) && (hz < 2000000)) {
mbed_official 181:a4cbdfbbd2f4 184 obj->br_presc = SPI_BAUDRATEPRESCALER_32; // 1 MHz
mbed_official 181:a4cbdfbbd2f4 185 } else if ((hz >= 2000000) && (hz < 4000000)) {
mbed_official 181:a4cbdfbbd2f4 186 obj->br_presc = SPI_BAUDRATEPRESCALER_16; // 2 MHz
mbed_official 181:a4cbdfbbd2f4 187 } else if ((hz >= 4000000) && (hz < 8000000)) {
mbed_official 181:a4cbdfbbd2f4 188 obj->br_presc = SPI_BAUDRATEPRESCALER_8; // 4 MHz
mbed_official 181:a4cbdfbbd2f4 189 } else if ((hz >= 8000000) && (hz < 16000000)) {
mbed_official 181:a4cbdfbbd2f4 190 obj->br_presc = SPI_BAUDRATEPRESCALER_4; // 8 MHz
mbed_official 181:a4cbdfbbd2f4 191 } else { // >= 16000000
mbed_official 181:a4cbdfbbd2f4 192 obj->br_presc = SPI_BAUDRATEPRESCALER_2; // 16 MHz
mbed_official 181:a4cbdfbbd2f4 193 }
mbed_official 531:47d2b67c511f 194
mbed_official 181:a4cbdfbbd2f4 195 init_spi(obj);
mbed_official 181:a4cbdfbbd2f4 196 }
mbed_official 181:a4cbdfbbd2f4 197
mbed_official 402:09075a3b15e3 198 static inline int ssp_readable(spi_t *obj)
mbed_official 402:09075a3b15e3 199 {
mbed_official 181:a4cbdfbbd2f4 200 int status;
mbed_official 181:a4cbdfbbd2f4 201 SpiHandle.Instance = (SPI_TypeDef *)(obj->spi);
mbed_official 181:a4cbdfbbd2f4 202 // Check if data is received
mbed_official 181:a4cbdfbbd2f4 203 status = ((__HAL_SPI_GET_FLAG(&SpiHandle, SPI_FLAG_RXNE) != RESET) ? 1 : 0);
mbed_official 181:a4cbdfbbd2f4 204 return status;
mbed_official 181:a4cbdfbbd2f4 205 }
mbed_official 181:a4cbdfbbd2f4 206
mbed_official 402:09075a3b15e3 207 static inline int ssp_writeable(spi_t *obj)
mbed_official 402:09075a3b15e3 208 {
mbed_official 181:a4cbdfbbd2f4 209 int status;
mbed_official 181:a4cbdfbbd2f4 210 SpiHandle.Instance = (SPI_TypeDef *)(obj->spi);
mbed_official 181:a4cbdfbbd2f4 211 // Check if data is transmitted
mbed_official 181:a4cbdfbbd2f4 212 status = ((__HAL_SPI_GET_FLAG(&SpiHandle, SPI_FLAG_TXE) != RESET) ? 1 : 0);
mbed_official 181:a4cbdfbbd2f4 213 return status;
mbed_official 181:a4cbdfbbd2f4 214 }
mbed_official 181:a4cbdfbbd2f4 215
mbed_official 402:09075a3b15e3 216 static inline void ssp_write(spi_t *obj, int value)
mbed_official 402:09075a3b15e3 217 {
mbed_official 181:a4cbdfbbd2f4 218 SPI_TypeDef *spi = (SPI_TypeDef *)(obj->spi);
mbed_official 181:a4cbdfbbd2f4 219 while (!ssp_writeable(obj));
mbed_official 181:a4cbdfbbd2f4 220 spi->DR = (uint16_t)value;
mbed_official 181:a4cbdfbbd2f4 221 }
mbed_official 181:a4cbdfbbd2f4 222
mbed_official 402:09075a3b15e3 223 static inline int ssp_read(spi_t *obj)
mbed_official 402:09075a3b15e3 224 {
mbed_official 181:a4cbdfbbd2f4 225 SPI_TypeDef *spi = (SPI_TypeDef *)(obj->spi);
mbed_official 181:a4cbdfbbd2f4 226 while (!ssp_readable(obj));
mbed_official 181:a4cbdfbbd2f4 227 return (int)spi->DR;
mbed_official 181:a4cbdfbbd2f4 228 }
mbed_official 181:a4cbdfbbd2f4 229
mbed_official 402:09075a3b15e3 230 static inline int ssp_busy(spi_t *obj)
mbed_official 402:09075a3b15e3 231 {
mbed_official 181:a4cbdfbbd2f4 232 int status;
mbed_official 181:a4cbdfbbd2f4 233 SpiHandle.Instance = (SPI_TypeDef *)(obj->spi);
mbed_official 181:a4cbdfbbd2f4 234 status = ((__HAL_SPI_GET_FLAG(&SpiHandle, SPI_FLAG_BSY) != RESET) ? 1 : 0);
mbed_official 181:a4cbdfbbd2f4 235 return status;
mbed_official 181:a4cbdfbbd2f4 236 }
mbed_official 181:a4cbdfbbd2f4 237
mbed_official 402:09075a3b15e3 238 int spi_master_write(spi_t *obj, int value)
mbed_official 402:09075a3b15e3 239 {
mbed_official 181:a4cbdfbbd2f4 240 ssp_write(obj, value);
mbed_official 181:a4cbdfbbd2f4 241 return ssp_read(obj);
mbed_official 181:a4cbdfbbd2f4 242 }
mbed_official 181:a4cbdfbbd2f4 243
mbed_official 402:09075a3b15e3 244 int spi_slave_receive(spi_t *obj)
mbed_official 402:09075a3b15e3 245 {
mbed_official 233:1bbc1451db33 246 return (ssp_readable(obj) ? 1 : 0);
mbed_official 181:a4cbdfbbd2f4 247 };
mbed_official 181:a4cbdfbbd2f4 248
mbed_official 402:09075a3b15e3 249 int spi_slave_read(spi_t *obj)
mbed_official 402:09075a3b15e3 250 {
mbed_official 181:a4cbdfbbd2f4 251 SPI_TypeDef *spi = (SPI_TypeDef *)(obj->spi);
mbed_official 181:a4cbdfbbd2f4 252 while (!ssp_readable(obj));
mbed_official 181:a4cbdfbbd2f4 253 return (int)spi->DR;
mbed_official 181:a4cbdfbbd2f4 254 }
mbed_official 181:a4cbdfbbd2f4 255
mbed_official 402:09075a3b15e3 256 void spi_slave_write(spi_t *obj, int value)
mbed_official 402:09075a3b15e3 257 {
mbed_official 181:a4cbdfbbd2f4 258 SPI_TypeDef *spi = (SPI_TypeDef *)(obj->spi);
mbed_official 181:a4cbdfbbd2f4 259 while (!ssp_writeable(obj));
mbed_official 181:a4cbdfbbd2f4 260 spi->DR = (uint16_t)value;
mbed_official 181:a4cbdfbbd2f4 261 }
mbed_official 181:a4cbdfbbd2f4 262
mbed_official 402:09075a3b15e3 263 int spi_busy(spi_t *obj)
mbed_official 402:09075a3b15e3 264 {
mbed_official 181:a4cbdfbbd2f4 265 return ssp_busy(obj);
mbed_official 181:a4cbdfbbd2f4 266 }
mbed_official 181:a4cbdfbbd2f4 267
mbed_official 181:a4cbdfbbd2f4 268 #endif