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Mbed for VNG board

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targets/hal/TARGET_STM/TARGET_NUCLEO_F103RB/spi_api.c@414:4ec4c5b614b0, 2014-11-25 (annotated)

Committer:
mbed_official
Date:
Tue Nov 25 07:15:09 2014 +0000
Revision:
414:4ec4c5b614b0
Parent:
402:09075a3b15e3 
Synchronized with git revision fbc74e874ac089c6cb05add312fb5422be628886



Full URL: https://github.com/mbedmicro/mbed/commit/fbc74e874ac089c6cb05add312fb5422be628886/



Targets: NUCLEOs - Add PeripheralPins files for all nucleo targets

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 52:a51c77007319 1 /* mbed Microcontroller Library
mbed_official 70:c1fbde68b492 2 *******************************************************************************
mbed_official 70:c1fbde68b492 3 * Copyright (c) 2014, STMicroelectronics
mbed_official 70:c1fbde68b492 4 * All rights reserved.
mbed_official 52:a51c77007319 5 *
mbed_official 70:c1fbde68b492 6 * Redistribution and use in source and binary forms, with or without
mbed_official 70:c1fbde68b492 7 * modification, are permitted provided that the following conditions are met:
mbed_official 52:a51c77007319 8 *
mbed_official 70:c1fbde68b492 9 * 1. Redistributions of source code must retain the above copyright notice,
mbed_official 70:c1fbde68b492 10 * this list of conditions and the following disclaimer.
mbed_official 70:c1fbde68b492 11 * 2. Redistributions in binary form must reproduce the above copyright notice,
mbed_official 70:c1fbde68b492 12 * this list of conditions and the following disclaimer in the documentation
mbed_official 70:c1fbde68b492 13 * and/or other materials provided with the distribution.
mbed_official 70:c1fbde68b492 14 * 3. Neither the name of STMicroelectronics nor the names of its contributors
mbed_official 70:c1fbde68b492 15 * may be used to endorse or promote products derived from this software
mbed_official 70:c1fbde68b492 16 * without specific prior written permission.
mbed_official 52:a51c77007319 17 *
mbed_official 70:c1fbde68b492 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
mbed_official 70:c1fbde68b492 19 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
mbed_official 70:c1fbde68b492 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
mbed_official 70:c1fbde68b492 21 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
mbed_official 70:c1fbde68b492 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
mbed_official 70:c1fbde68b492 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
mbed_official 70:c1fbde68b492 24 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
mbed_official 70:c1fbde68b492 25 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
mbed_official 70:c1fbde68b492 26 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
mbed_official 70:c1fbde68b492 27 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
mbed_official 70:c1fbde68b492 28 *******************************************************************************
mbed_official 52:a51c77007319 29 */
mbed_official 227:7bd0639b8911 30 #include "mbed_assert.h"
mbed_official 52:a51c77007319 31 #include "spi_api.h"
mbed_official 52:a51c77007319 32
mbed_official 52:a51c77007319 33 #if DEVICE_SPI
mbed_official 52:a51c77007319 34
mbed_official 52:a51c77007319 35 #include <math.h>
mbed_official 52:a51c77007319 36 #include "cmsis.h"
mbed_official 52:a51c77007319 37 #include "pinmap.h"
mbed_official 414:4ec4c5b614b0 38 #include "PeripheralPins.h"
mbed_official 52:a51c77007319 39
mbed_official 402:09075a3b15e3 40 static void init_spi(spi_t *obj)
mbed_official 402:09075a3b15e3 41 {
mbed_official 56:99eb381a3269 42 SPI_TypeDef *spi = (SPI_TypeDef *)(obj->spi);
mbed_official 56:99eb381a3269 43 SPI_InitTypeDef SPI_InitStructure;
mbed_official 56:99eb381a3269 44
mbed_official 56:99eb381a3269 45 SPI_Cmd(spi, DISABLE);
mbed_official 52:a51c77007319 46
mbed_official 139:e3413eddde57 47 SPI_InitStructure.SPI_Mode = obj->mode;
mbed_official 139:e3413eddde57 48 SPI_InitStructure.SPI_NSS = obj->nss;
mbed_official 174:8bb9f3a33240 49 SPI_InitStructure.SPI_Direction = SPI_Direction_2Lines_FullDuplex;
mbed_official 139:e3413eddde57 50 SPI_InitStructure.SPI_DataSize = obj->bits;
mbed_official 139:e3413eddde57 51 SPI_InitStructure.SPI_CPOL = obj->cpol;
mbed_official 139:e3413eddde57 52 SPI_InitStructure.SPI_CPHA = obj->cpha;
mbed_official 56:99eb381a3269 53 SPI_InitStructure.SPI_BaudRatePrescaler = obj->br_presc;
mbed_official 139:e3413eddde57 54 SPI_InitStructure.SPI_FirstBit = SPI_FirstBit_MSB;
mbed_official 139:e3413eddde57 55 SPI_InitStructure.SPI_CRCPolynomial = 7;
mbed_official 56:99eb381a3269 56 SPI_Init(spi, &SPI_InitStructure);
mbed_official 56:99eb381a3269 57
mbed_official 56:99eb381a3269 58 SPI_Cmd(spi, ENABLE);
mbed_official 56:99eb381a3269 59 }
mbed_official 56:99eb381a3269 60
mbed_official 402:09075a3b15e3 61 void spi_init(spi_t *obj, PinName mosi, PinName miso, PinName sclk, PinName ssel)
mbed_official 402:09075a3b15e3 62 {
mbed_official 52:a51c77007319 63 // Determine the SPI to use
mbed_official 52:a51c77007319 64 SPIName spi_mosi = (SPIName)pinmap_peripheral(mosi, PinMap_SPI_MOSI);
mbed_official 52:a51c77007319 65 SPIName spi_miso = (SPIName)pinmap_peripheral(miso, PinMap_SPI_MISO);
mbed_official 52:a51c77007319 66 SPIName spi_sclk = (SPIName)pinmap_peripheral(sclk, PinMap_SPI_SCLK);
mbed_official 52:a51c77007319 67 SPIName spi_ssel = (SPIName)pinmap_peripheral(ssel, PinMap_SPI_SSEL);
mbed_official 174:8bb9f3a33240 68
mbed_official 52:a51c77007319 69 SPIName spi_data = (SPIName)pinmap_merge(spi_mosi, spi_miso);
mbed_official 52:a51c77007319 70 SPIName spi_cntl = (SPIName)pinmap_merge(spi_sclk, spi_ssel);
mbed_official 174:8bb9f3a33240 71
mbed_official 52:a51c77007319 72 obj->spi = (SPIName)pinmap_merge(spi_data, spi_cntl);
mbed_official 227:7bd0639b8911 73 MBED_ASSERT(obj->spi != (SPIName)NC);
mbed_official 174:8bb9f3a33240 74
mbed_official 52:a51c77007319 75 // Enable SPI clock
mbed_official 52:a51c77007319 76 if (obj->spi == SPI_1) {
mbed_official 174:8bb9f3a33240 77 RCC_APB2PeriphClockCmd(RCC_APB2Periph_SPI1, ENABLE);
mbed_official 52:a51c77007319 78 }
mbed_official 139:e3413eddde57 79 if (obj->spi == SPI_2) {
mbed_official 139:e3413eddde57 80 RCC_APB1PeriphClockCmd(RCC_APB1Periph_SPI2, ENABLE);
mbed_official 139:e3413eddde57 81 }
mbed_official 139:e3413eddde57 82
mbed_official 52:a51c77007319 83 // Configure the SPI pins
mbed_official 52:a51c77007319 84 pinmap_pinout(mosi, PinMap_SPI_MOSI);
mbed_official 52:a51c77007319 85 pinmap_pinout(miso, PinMap_SPI_MISO);
mbed_official 52:a51c77007319 86 pinmap_pinout(sclk, PinMap_SPI_SCLK);
mbed_official 174:8bb9f3a33240 87
mbed_official 52:a51c77007319 88 // Save new values
mbed_official 52:a51c77007319 89 obj->bits = SPI_DataSize_8b;
mbed_official 52:a51c77007319 90 obj->cpol = SPI_CPOL_Low;
mbed_official 52:a51c77007319 91 obj->cpha = SPI_CPHA_1Edge;
mbed_official 139:e3413eddde57 92 obj->br_presc = SPI_BaudRatePrescaler_256;
mbed_official 174:8bb9f3a33240 93
mbed_official 208:4557f4bb2dd5 94 obj->pin_miso = miso;
mbed_official 208:4557f4bb2dd5 95 obj->pin_mosi = mosi;
mbed_official 208:4557f4bb2dd5 96 obj->pin_sclk = sclk;
mbed_official 208:4557f4bb2dd5 97 obj->pin_ssel = ssel;
mbed_official 208:4557f4bb2dd5 98
mbed_official 52:a51c77007319 99 if (ssel == NC) { // Master
mbed_official 52:a51c77007319 100 obj->mode = SPI_Mode_Master;
mbed_official 52:a51c77007319 101 obj->nss = SPI_NSS_Soft;
mbed_official 174:8bb9f3a33240 102 } else { // Slave
mbed_official 52:a51c77007319 103 pinmap_pinout(ssel, PinMap_SPI_SSEL);
mbed_official 52:a51c77007319 104 obj->mode = SPI_Mode_Slave;
mbed_official 181:a4cbdfbbd2f4 105 obj->nss = SPI_NSS_Hard;
mbed_official 52:a51c77007319 106 }
mbed_official 52:a51c77007319 107
mbed_official 56:99eb381a3269 108 init_spi(obj);
mbed_official 52:a51c77007319 109 }
mbed_official 52:a51c77007319 110
mbed_official 402:09075a3b15e3 111 void spi_free(spi_t *obj)
mbed_official 402:09075a3b15e3 112 {
mbed_official 208:4557f4bb2dd5 113 // Reset SPI and disable clock
mbed_official 208:4557f4bb2dd5 114 if (obj->spi == SPI_1) {
mbed_official 208:4557f4bb2dd5 115 RCC_APB2PeriphResetCmd(RCC_APB2Periph_SPI1, ENABLE);
mbed_official 208:4557f4bb2dd5 116 RCC_APB2PeriphResetCmd(RCC_APB2Periph_SPI1, DISABLE);
mbed_official 208:4557f4bb2dd5 117 RCC_APB2PeriphClockCmd(RCC_APB2Periph_SPI1, DISABLE);
mbed_official 208:4557f4bb2dd5 118 }
mbed_official 208:4557f4bb2dd5 119
mbed_official 208:4557f4bb2dd5 120 if (obj->spi == SPI_2) {
mbed_official 208:4557f4bb2dd5 121 RCC_APB1PeriphResetCmd(RCC_APB1Periph_SPI2, ENABLE);
mbed_official 208:4557f4bb2dd5 122 RCC_APB1PeriphResetCmd(RCC_APB1Periph_SPI2, DISABLE);
mbed_official 208:4557f4bb2dd5 123 RCC_APB1PeriphClockCmd(RCC_APB1Periph_SPI2, DISABLE);
mbed_official 208:4557f4bb2dd5 124 }
mbed_official 208:4557f4bb2dd5 125
mbed_official 208:4557f4bb2dd5 126 // Configure GPIOs
mbed_official 208:4557f4bb2dd5 127 pin_function(obj->pin_miso, STM_PIN_DATA(GPIO_Mode_IN_FLOATING, 0));
mbed_official 208:4557f4bb2dd5 128 pin_function(obj->pin_mosi, STM_PIN_DATA(GPIO_Mode_IN_FLOATING, 0));
mbed_official 208:4557f4bb2dd5 129 pin_function(obj->pin_sclk, STM_PIN_DATA(GPIO_Mode_IN_FLOATING, 0));
mbed_official 208:4557f4bb2dd5 130 pin_function(obj->pin_ssel, STM_PIN_DATA(GPIO_Mode_IN_FLOATING, 0));
mbed_official 52:a51c77007319 131 }
mbed_official 52:a51c77007319 132
mbed_official 402:09075a3b15e3 133 void spi_format(spi_t *obj, int bits, int mode, int slave)
mbed_official 402:09075a3b15e3 134 {
mbed_official 52:a51c77007319 135 // Save new values
mbed_official 233:1bbc1451db33 136 if (bits == 16) {
mbed_official 233:1bbc1451db33 137 obj->bits = SPI_DataSize_16b;
mbed_official 233:1bbc1451db33 138 } else {
mbed_official 52:a51c77007319 139 obj->bits = SPI_DataSize_8b;
mbed_official 52:a51c77007319 140 }
mbed_official 174:8bb9f3a33240 141
mbed_official 52:a51c77007319 142 switch (mode) {
mbed_official 52:a51c77007319 143 case 0:
mbed_official 174:8bb9f3a33240 144 obj->cpol = SPI_CPOL_Low;
mbed_official 174:8bb9f3a33240 145 obj->cpha = SPI_CPHA_1Edge;
mbed_official 174:8bb9f3a33240 146 break;
mbed_official 52:a51c77007319 147 case 1:
mbed_official 174:8bb9f3a33240 148 obj->cpol = SPI_CPOL_Low;
mbed_official 174:8bb9f3a33240 149 obj->cpha = SPI_CPHA_2Edge;
mbed_official 174:8bb9f3a33240 150 break;
mbed_official 52:a51c77007319 151 case 2:
mbed_official 174:8bb9f3a33240 152 obj->cpol = SPI_CPOL_High;
mbed_official 174:8bb9f3a33240 153 obj->cpha = SPI_CPHA_1Edge;
mbed_official 174:8bb9f3a33240 154 break;
mbed_official 52:a51c77007319 155 default:
mbed_official 174:8bb9f3a33240 156 obj->cpol = SPI_CPOL_High;
mbed_official 174:8bb9f3a33240 157 obj->cpha = SPI_CPHA_2Edge;
mbed_official 174:8bb9f3a33240 158 break;
mbed_official 52:a51c77007319 159 }
mbed_official 174:8bb9f3a33240 160
mbed_official 52:a51c77007319 161 if (slave == 0) {
mbed_official 52:a51c77007319 162 obj->mode = SPI_Mode_Master;
mbed_official 52:a51c77007319 163 obj->nss = SPI_NSS_Soft;
mbed_official 174:8bb9f3a33240 164 } else {
mbed_official 52:a51c77007319 165 obj->mode = SPI_Mode_Slave;
mbed_official 174:8bb9f3a33240 166 obj->nss = SPI_NSS_Hard;
mbed_official 52:a51c77007319 167 }
mbed_official 174:8bb9f3a33240 168
mbed_official 56:99eb381a3269 169 init_spi(obj);
mbed_official 52:a51c77007319 170 }
mbed_official 52:a51c77007319 171
mbed_official 402:09075a3b15e3 172 void spi_frequency(spi_t *obj, int hz)
mbed_official 402:09075a3b15e3 173 {
mbed_official 139:e3413eddde57 174 if (obj->spi == SPI_1) {
mbed_official 139:e3413eddde57 175 // Values depend of PCLK2: 64 MHz if HSI is used, 72 MHz if HSE is used
mbed_official 139:e3413eddde57 176 if (hz < 500000) {
mbed_official 139:e3413eddde57 177 obj->br_presc = SPI_BaudRatePrescaler_256; // 250 kHz - 281 kHz
mbed_official 174:8bb9f3a33240 178 } else if ((hz >= 500000) && (hz < 1000000)) {
mbed_official 139:e3413eddde57 179 obj->br_presc = SPI_BaudRatePrescaler_128; // 500 kHz - 563 kHz
mbed_official 174:8bb9f3a33240 180 } else if ((hz >= 1000000) && (hz < 2000000)) {
mbed_official 139:e3413eddde57 181 obj->br_presc = SPI_BaudRatePrescaler_64; // 1 MHz - 1.13 MHz
mbed_official 174:8bb9f3a33240 182 } else if ((hz >= 2000000) && (hz < 4000000)) {
mbed_official 139:e3413eddde57 183 obj->br_presc = SPI_BaudRatePrescaler_32; // 2 MHz - 2.25 MHz
mbed_official 174:8bb9f3a33240 184 } else if ((hz >= 4000000) && (hz < 8000000)) {
mbed_official 139:e3413eddde57 185 obj->br_presc = SPI_BaudRatePrescaler_16; // 4 MHz - 4.5 MHz
mbed_official 174:8bb9f3a33240 186 } else if ((hz >= 8000000) && (hz < 16000000)) {
mbed_official 139:e3413eddde57 187 obj->br_presc = SPI_BaudRatePrescaler_8; // 8 MHz - 9 MHz
mbed_official 174:8bb9f3a33240 188 } else if ((hz >= 16000000) && (hz < 32000000)) {
mbed_official 139:e3413eddde57 189 obj->br_presc = SPI_BaudRatePrescaler_4; // 16 MHz - 18 MHz
mbed_official 174:8bb9f3a33240 190 } else { // >= 32000000
mbed_official 139:e3413eddde57 191 obj->br_presc = SPI_BaudRatePrescaler_2; // 32 MHz - 36 MHz
mbed_official 139:e3413eddde57 192 }
mbed_official 139:e3413eddde57 193 }
mbed_official 174:8bb9f3a33240 194
mbed_official 139:e3413eddde57 195 if (obj->spi == SPI_2) {
mbed_official 139:e3413eddde57 196 // Values depend of PCLK1: 32 MHz if HSI is used, 36 MHz if HSE is used
mbed_official 139:e3413eddde57 197 if (hz < 250000) {
mbed_official 139:e3413eddde57 198 obj->br_presc = SPI_BaudRatePrescaler_256; // 125 kHz - 141 kHz
mbed_official 174:8bb9f3a33240 199 } else if ((hz >= 250000) && (hz < 500000)) {
mbed_official 139:e3413eddde57 200 obj->br_presc = SPI_BaudRatePrescaler_128; // 250 kHz - 281 kHz
mbed_official 174:8bb9f3a33240 201 } else if ((hz >= 500000) && (hz < 1000000)) {
mbed_official 139:e3413eddde57 202 obj->br_presc = SPI_BaudRatePrescaler_64; // 500 kHz - 563 kHz
mbed_official 174:8bb9f3a33240 203 } else if ((hz >= 1000000) && (hz < 2000000)) {
mbed_official 139:e3413eddde57 204 obj->br_presc = SPI_BaudRatePrescaler_32; // 1 MHz - 1.13 MHz
mbed_official 174:8bb9f3a33240 205 } else if ((hz >= 2000000) && (hz < 4000000)) {
mbed_official 139:e3413eddde57 206 obj->br_presc = SPI_BaudRatePrescaler_16; // 2 MHz - 2.25 MHz
mbed_official 174:8bb9f3a33240 207 } else if ((hz >= 4000000) && (hz < 8000000)) {
mbed_official 139:e3413eddde57 208 obj->br_presc = SPI_BaudRatePrescaler_8; // 4 MHz - 4.5 MHz
mbed_official 174:8bb9f3a33240 209 } else if ((hz >= 8000000) && (hz < 16000000)) {
mbed_official 139:e3413eddde57 210 obj->br_presc = SPI_BaudRatePrescaler_4; // 8 MHz - 9 MHz
mbed_official 174:8bb9f3a33240 211 } else { // >= 16000000
mbed_official 139:e3413eddde57 212 obj->br_presc = SPI_BaudRatePrescaler_2; // 16 MHz - 18 MHz
mbed_official 139:e3413eddde57 213 }
mbed_official 139:e3413eddde57 214 }
mbed_official 52:a51c77007319 215
mbed_official 56:99eb381a3269 216 init_spi(obj);
mbed_official 52:a51c77007319 217 }
mbed_official 52:a51c77007319 218
mbed_official 402:09075a3b15e3 219 static inline int ssp_readable(spi_t *obj)
mbed_official 402:09075a3b15e3 220 {
mbed_official 52:a51c77007319 221 int status;
mbed_official 52:a51c77007319 222 SPI_TypeDef *spi = (SPI_TypeDef *)(obj->spi);
mbed_official 52:a51c77007319 223 // Check if data is received
mbed_official 52:a51c77007319 224 status = ((SPI_I2S_GetFlagStatus(spi, SPI_I2S_FLAG_RXNE) != RESET) ? 1 : 0);
mbed_official 174:8bb9f3a33240 225 return status;
mbed_official 52:a51c77007319 226 }
mbed_official 52:a51c77007319 227
mbed_official 402:09075a3b15e3 228 static inline int ssp_writeable(spi_t *obj)
mbed_official 402:09075a3b15e3 229 {
mbed_official 52:a51c77007319 230 int status;
mbed_official 52:a51c77007319 231 SPI_TypeDef *spi = (SPI_TypeDef *)(obj->spi);
mbed_official 52:a51c77007319 232 // Check if data is transmitted
mbed_official 52:a51c77007319 233 status = ((SPI_I2S_GetFlagStatus(spi, SPI_I2S_FLAG_TXE) != RESET) ? 1 : 0);
mbed_official 52:a51c77007319 234 return status;
mbed_official 52:a51c77007319 235 }
mbed_official 52:a51c77007319 236
mbed_official 402:09075a3b15e3 237 static inline void ssp_write(spi_t *obj, int value)
mbed_official 402:09075a3b15e3 238 {
mbed_official 174:8bb9f3a33240 239 SPI_TypeDef *spi = (SPI_TypeDef *)(obj->spi);
mbed_official 52:a51c77007319 240 while (!ssp_writeable(obj));
mbed_official 52:a51c77007319 241 SPI_I2S_SendData(spi, (uint16_t)value);
mbed_official 52:a51c77007319 242 }
mbed_official 52:a51c77007319 243
mbed_official 402:09075a3b15e3 244 static inline int ssp_read(spi_t *obj)
mbed_official 402:09075a3b15e3 245 {
mbed_official 174:8bb9f3a33240 246 SPI_TypeDef *spi = (SPI_TypeDef *)(obj->spi);
mbed_official 52:a51c77007319 247 while (!ssp_readable(obj));
mbed_official 52:a51c77007319 248 return (int)SPI_I2S_ReceiveData(spi);
mbed_official 52:a51c77007319 249 }
mbed_official 52:a51c77007319 250
mbed_official 402:09075a3b15e3 251 static inline int ssp_busy(spi_t *obj)
mbed_official 402:09075a3b15e3 252 {
mbed_official 52:a51c77007319 253 int status;
mbed_official 52:a51c77007319 254 SPI_TypeDef *spi = (SPI_TypeDef *)(obj->spi);
mbed_official 52:a51c77007319 255 status = ((SPI_I2S_GetFlagStatus(spi, SPI_I2S_FLAG_BSY) != RESET) ? 1 : 0);
mbed_official 52:a51c77007319 256 return status;
mbed_official 52:a51c77007319 257 }
mbed_official 52:a51c77007319 258
mbed_official 402:09075a3b15e3 259 int spi_master_write(spi_t *obj, int value)
mbed_official 402:09075a3b15e3 260 {
mbed_official 52:a51c77007319 261 ssp_write(obj, value);
mbed_official 52:a51c77007319 262 return ssp_read(obj);
mbed_official 52:a51c77007319 263 }
mbed_official 52:a51c77007319 264
mbed_official 402:09075a3b15e3 265 int spi_slave_receive(spi_t *obj)
mbed_official 402:09075a3b15e3 266 {
mbed_official 233:1bbc1451db33 267 return ((ssp_readable(obj) && !ssp_busy(obj)) ? 1 : 0);
mbed_official 52:a51c77007319 268 };
mbed_official 52:a51c77007319 269
mbed_official 402:09075a3b15e3 270 int spi_slave_read(spi_t *obj)
mbed_official 402:09075a3b15e3 271 {
mbed_official 52:a51c77007319 272 SPI_TypeDef *spi = (SPI_TypeDef *)(obj->spi);
mbed_official 52:a51c77007319 273 return (int)SPI_I2S_ReceiveData(spi);
mbed_official 52:a51c77007319 274 }
mbed_official 52:a51c77007319 275
mbed_official 402:09075a3b15e3 276 void spi_slave_write(spi_t *obj, int value)
mbed_official 402:09075a3b15e3 277 {
mbed_official 174:8bb9f3a33240 278 SPI_TypeDef *spi = (SPI_TypeDef *)(obj->spi);
mbed_official 174:8bb9f3a33240 279 while (!ssp_writeable(obj));
mbed_official 52:a51c77007319 280 SPI_I2S_SendData(spi, (uint16_t)value);
mbed_official 52:a51c77007319 281 }
mbed_official 52:a51c77007319 282
mbed_official 402:09075a3b15e3 283 int spi_busy(spi_t *obj)
mbed_official 402:09075a3b15e3 284 {
mbed_official 52:a51c77007319 285 return ssp_busy(obj);
mbed_official 52:a51c77007319 286 }
mbed_official 52:a51c77007319 287
mbed_official 52:a51c77007319 288 #endif