shao ziyang / mbed-src-kl05

mbed library sources

Dependents:   frdm_kl05z_gpio_test

Fork of mbed-src by mbed official

targets/hal/TARGET_STM/TARGET_DISCO_F303VC/spi_api.c@323:9e901b0a5aa1, 2014-09-13 (annotated)

Committer:
shaoziyang
Date:
Sat Sep 13 14:25:46 2014 +0000
Revision:
323:9e901b0a5aa1
Parent:
241:ffe41b0c8126 
test with CLOCK_SETUP = 0

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 157:90e3acc479a2 1 /* mbed Microcontroller Library
mbed_official 157:90e3acc479a2 2 *******************************************************************************
mbed_official 157:90e3acc479a2 3 * Copyright (c) 2014, STMicroelectronics
mbed_official 157:90e3acc479a2 4 * All rights reserved.
mbed_official 157:90e3acc479a2 5 *
mbed_official 157:90e3acc479a2 6 * Redistribution and use in source and binary forms, with or without
mbed_official 157:90e3acc479a2 7 * modification, are permitted provided that the following conditions are met:
mbed_official 157:90e3acc479a2 8 *
mbed_official 157:90e3acc479a2 9 * 1. Redistributions of source code must retain the above copyright notice,
mbed_official 157:90e3acc479a2 10 * this list of conditions and the following disclaimer.
mbed_official 157:90e3acc479a2 11 * 2. Redistributions in binary form must reproduce the above copyright notice,
mbed_official 157:90e3acc479a2 12 * this list of conditions and the following disclaimer in the documentation
mbed_official 157:90e3acc479a2 13 * and/or other materials provided with the distribution.
mbed_official 157:90e3acc479a2 14 * 3. Neither the name of STMicroelectronics nor the names of its contributors
mbed_official 157:90e3acc479a2 15 * may be used to endorse or promote products derived from this software
mbed_official 157:90e3acc479a2 16 * without specific prior written permission.
mbed_official 157:90e3acc479a2 17 *
mbed_official 157:90e3acc479a2 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
mbed_official 157:90e3acc479a2 19 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
mbed_official 157:90e3acc479a2 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
mbed_official 157:90e3acc479a2 21 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
mbed_official 157:90e3acc479a2 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
mbed_official 157:90e3acc479a2 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
mbed_official 157:90e3acc479a2 24 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
mbed_official 157:90e3acc479a2 25 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
mbed_official 157:90e3acc479a2 26 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
mbed_official 157:90e3acc479a2 27 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
mbed_official 157:90e3acc479a2 28 *******************************************************************************
mbed_official 157:90e3acc479a2 29 */
mbed_official 227:7bd0639b8911 30 #include "mbed_assert.h"
mbed_official 157:90e3acc479a2 31 #include "spi_api.h"
mbed_official 157:90e3acc479a2 32
mbed_official 157:90e3acc479a2 33 #if DEVICE_SPI
mbed_official 157:90e3acc479a2 34
mbed_official 157:90e3acc479a2 35 #include <math.h>
mbed_official 157:90e3acc479a2 36 #include "cmsis.h"
mbed_official 157:90e3acc479a2 37 #include "pinmap.h"
mbed_official 157:90e3acc479a2 38
mbed_official 157:90e3acc479a2 39 static const PinMap PinMap_SPI_MOSI[] = {
mbed_official 157:90e3acc479a2 40 {PA_11, SPI_2, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_DOWN, GPIO_AF_5)},
mbed_official 157:90e3acc479a2 41 {PB_5, SPI_3, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_DOWN, GPIO_AF_6)},
mbed_official 157:90e3acc479a2 42 {PB_15, SPI_2, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_DOWN, GPIO_AF_5)},
mbed_official 157:90e3acc479a2 43 {PC_12, SPI_3, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_DOWN, GPIO_AF_6)},
mbed_official 157:90e3acc479a2 44 {NC, NC, 0}
mbed_official 157:90e3acc479a2 45 };
mbed_official 157:90e3acc479a2 46
mbed_official 157:90e3acc479a2 47 static const PinMap PinMap_SPI_MISO[] = {
mbed_official 157:90e3acc479a2 48 {PA_10, SPI_2, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_DOWN, GPIO_AF_5)},
mbed_official 157:90e3acc479a2 49 {PB_4, SPI_3, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_DOWN, GPIO_AF_6)},
mbed_official 157:90e3acc479a2 50 {PB_14, SPI_2, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_DOWN, GPIO_AF_5)},
mbed_official 157:90e3acc479a2 51 {PC_11, SPI_3, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_DOWN, GPIO_AF_6)},
mbed_official 157:90e3acc479a2 52 {NC, NC, 0}
mbed_official 157:90e3acc479a2 53 };
mbed_official 157:90e3acc479a2 54
mbed_official 157:90e3acc479a2 55 static const PinMap PinMap_SPI_SCLK[] = {
mbed_official 157:90e3acc479a2 56 {PB_3, SPI_3, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_DOWN, GPIO_AF_6)},
mbed_official 157:90e3acc479a2 57 {PB_13, SPI_2, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_DOWN, GPIO_AF_5)},
mbed_official 157:90e3acc479a2 58 {PC_10, SPI_3, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_DOWN, GPIO_AF_6)},
mbed_official 157:90e3acc479a2 59 {PF_1, SPI_2, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_DOWN, GPIO_AF_5)},
mbed_official 157:90e3acc479a2 60 {NC, NC, 0}
mbed_official 157:90e3acc479a2 61 };
mbed_official 157:90e3acc479a2 62
mbed_official 157:90e3acc479a2 63 static const PinMap PinMap_SPI_SSEL[] = {
mbed_official 157:90e3acc479a2 64 {PA_4, SPI_3, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_DOWN, GPIO_AF_6)},
mbed_official 157:90e3acc479a2 65 {PA_15, SPI_3, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_DOWN, GPIO_AF_6)},
mbed_official 157:90e3acc479a2 66 {PB_12, SPI_2, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_DOWN, GPIO_AF_5)},
mbed_official 157:90e3acc479a2 67 {PF_0, SPI_2, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_DOWN, GPIO_AF_5)},
mbed_official 157:90e3acc479a2 68 {NC, NC, 0}
mbed_official 157:90e3acc479a2 69 };
mbed_official 157:90e3acc479a2 70
mbed_official 157:90e3acc479a2 71 static void init_spi(spi_t *obj) {
mbed_official 157:90e3acc479a2 72 SPI_TypeDef *spi = (SPI_TypeDef *)(obj->spi);
mbed_official 157:90e3acc479a2 73 SPI_InitTypeDef SPI_InitStructure;
mbed_official 157:90e3acc479a2 74
mbed_official 157:90e3acc479a2 75 SPI_Cmd(spi, DISABLE);
mbed_official 157:90e3acc479a2 76
mbed_official 157:90e3acc479a2 77 SPI_InitStructure.SPI_Mode = obj->mode;
mbed_official 227:7bd0639b8911 78 SPI_InitStructure.SPI_NSS = obj->nss;
mbed_official 227:7bd0639b8911 79 SPI_InitStructure.SPI_Direction = SPI_Direction_2Lines_FullDuplex;
mbed_official 157:90e3acc479a2 80 SPI_InitStructure.SPI_DataSize = obj->bits;
mbed_official 157:90e3acc479a2 81 SPI_InitStructure.SPI_CPOL = obj->cpol;
mbed_official 227:7bd0639b8911 82 SPI_InitStructure.SPI_CPHA = obj->cpha;
mbed_official 157:90e3acc479a2 83 SPI_InitStructure.SPI_BaudRatePrescaler = obj->br_presc;
mbed_official 157:90e3acc479a2 84 SPI_InitStructure.SPI_FirstBit = SPI_FirstBit_MSB;
mbed_official 157:90e3acc479a2 85 SPI_InitStructure.SPI_CRCPolynomial = 7;
mbed_official 157:90e3acc479a2 86 SPI_Init(spi, &SPI_InitStructure);
mbed_official 157:90e3acc479a2 87
mbed_official 227:7bd0639b8911 88 SPI_RxFIFOThresholdConfig(spi, SPI_RxFIFOThreshold_QF);
mbed_official 157:90e3acc479a2 89
mbed_official 157:90e3acc479a2 90 SPI_Cmd(spi, ENABLE);
mbed_official 157:90e3acc479a2 91 }
mbed_official 157:90e3acc479a2 92
mbed_official 157:90e3acc479a2 93 void spi_init(spi_t *obj, PinName mosi, PinName miso, PinName sclk, PinName ssel) {
mbed_official 157:90e3acc479a2 94 // Determine the SPI to use
mbed_official 157:90e3acc479a2 95 SPIName spi_mosi = (SPIName)pinmap_peripheral(mosi, PinMap_SPI_MOSI);
mbed_official 157:90e3acc479a2 96 SPIName spi_miso = (SPIName)pinmap_peripheral(miso, PinMap_SPI_MISO);
mbed_official 157:90e3acc479a2 97 SPIName spi_sclk = (SPIName)pinmap_peripheral(sclk, PinMap_SPI_SCLK);
mbed_official 157:90e3acc479a2 98 SPIName spi_ssel = (SPIName)pinmap_peripheral(ssel, PinMap_SPI_SSEL);
mbed_official 157:90e3acc479a2 99
mbed_official 157:90e3acc479a2 100 SPIName spi_data = (SPIName)pinmap_merge(spi_mosi, spi_miso);
mbed_official 157:90e3acc479a2 101 SPIName spi_cntl = (SPIName)pinmap_merge(spi_sclk, spi_ssel);
mbed_official 157:90e3acc479a2 102
mbed_official 157:90e3acc479a2 103 obj->spi = (SPIName)pinmap_merge(spi_data, spi_cntl);
mbed_official 227:7bd0639b8911 104 MBED_ASSERT(obj->spi != (SPIName)NC);
mbed_official 157:90e3acc479a2 105
mbed_official 157:90e3acc479a2 106 // Enable SPI clock
mbed_official 157:90e3acc479a2 107 if (obj->spi == SPI_2) {
mbed_official 227:7bd0639b8911 108 RCC_APB1PeriphClockCmd(RCC_APB1Periph_SPI2, ENABLE);
mbed_official 157:90e3acc479a2 109 }
mbed_official 157:90e3acc479a2 110 if (obj->spi == SPI_3) {
mbed_official 227:7bd0639b8911 111 RCC_APB1PeriphClockCmd(RCC_APB1Periph_SPI3, ENABLE);
mbed_official 157:90e3acc479a2 112 }
mbed_official 157:90e3acc479a2 113
mbed_official 157:90e3acc479a2 114 // Configure the SPI pins
mbed_official 157:90e3acc479a2 115 pinmap_pinout(mosi, PinMap_SPI_MOSI);
mbed_official 157:90e3acc479a2 116 pinmap_pinout(miso, PinMap_SPI_MISO);
mbed_official 157:90e3acc479a2 117 pinmap_pinout(sclk, PinMap_SPI_SCLK);
mbed_official 157:90e3acc479a2 118
mbed_official 157:90e3acc479a2 119 // Save new values
mbed_official 157:90e3acc479a2 120 obj->bits = SPI_DataSize_8b;
mbed_official 157:90e3acc479a2 121 obj->cpol = SPI_CPOL_Low;
mbed_official 157:90e3acc479a2 122 obj->cpha = SPI_CPHA_1Edge;
mbed_official 157:90e3acc479a2 123 obj->br_presc = SPI_BaudRatePrescaler_256;
mbed_official 157:90e3acc479a2 124
mbed_official 241:ffe41b0c8126 125 obj->pin_miso = miso;
mbed_official 241:ffe41b0c8126 126 obj->pin_mosi = mosi;
mbed_official 241:ffe41b0c8126 127 obj->pin_sclk = sclk;
mbed_official 241:ffe41b0c8126 128 obj->pin_ssel = ssel;
mbed_official 241:ffe41b0c8126 129
mbed_official 157:90e3acc479a2 130 if (ssel == NC) { // Master
mbed_official 157:90e3acc479a2 131 obj->mode = SPI_Mode_Master;
mbed_official 157:90e3acc479a2 132 obj->nss = SPI_NSS_Soft;
mbed_official 157:90e3acc479a2 133 } else { // Slave
mbed_official 157:90e3acc479a2 134 pinmap_pinout(ssel, PinMap_SPI_SSEL);
mbed_official 157:90e3acc479a2 135 obj->mode = SPI_Mode_Slave;
mbed_official 241:ffe41b0c8126 136 obj->nss = SPI_NSS_Hard;
mbed_official 157:90e3acc479a2 137 }
mbed_official 157:90e3acc479a2 138
mbed_official 157:90e3acc479a2 139 init_spi(obj);
mbed_official 157:90e3acc479a2 140 }
mbed_official 157:90e3acc479a2 141
mbed_official 157:90e3acc479a2 142 void spi_free(spi_t *obj) {
mbed_official 157:90e3acc479a2 143 SPI_TypeDef *spi = (SPI_TypeDef *)(obj->spi);
mbed_official 157:90e3acc479a2 144 SPI_I2S_DeInit(spi);
mbed_official 157:90e3acc479a2 145 }
mbed_official 157:90e3acc479a2 146
mbed_official 227:7bd0639b8911 147 void spi_format(spi_t *obj, int bits, int mode, int slave) {
mbed_official 157:90e3acc479a2 148 // Save new values
mbed_official 241:ffe41b0c8126 149 if (bits == 16) {
mbed_official 241:ffe41b0c8126 150 obj->bits = SPI_DataSize_16b;
mbed_official 241:ffe41b0c8126 151 } else {
mbed_official 157:90e3acc479a2 152 obj->bits = SPI_DataSize_8b;
mbed_official 157:90e3acc479a2 153 }
mbed_official 157:90e3acc479a2 154
mbed_official 157:90e3acc479a2 155 switch (mode) {
mbed_official 157:90e3acc479a2 156 case 0:
mbed_official 157:90e3acc479a2 157 obj->cpol = SPI_CPOL_Low;
mbed_official 157:90e3acc479a2 158 obj->cpha = SPI_CPHA_1Edge;
mbed_official 157:90e3acc479a2 159 break;
mbed_official 157:90e3acc479a2 160 case 1:
mbed_official 157:90e3acc479a2 161 obj->cpol = SPI_CPOL_Low;
mbed_official 157:90e3acc479a2 162 obj->cpha = SPI_CPHA_2Edge;
mbed_official 157:90e3acc479a2 163 break;
mbed_official 157:90e3acc479a2 164 case 2:
mbed_official 157:90e3acc479a2 165 obj->cpol = SPI_CPOL_High;
mbed_official 227:7bd0639b8911 166 obj->cpha = SPI_CPHA_1Edge;
mbed_official 157:90e3acc479a2 167 break;
mbed_official 157:90e3acc479a2 168 default:
mbed_official 157:90e3acc479a2 169 obj->cpol = SPI_CPOL_High;
mbed_official 227:7bd0639b8911 170 obj->cpha = SPI_CPHA_2Edge;
mbed_official 157:90e3acc479a2 171 break;
mbed_official 157:90e3acc479a2 172 }
mbed_official 157:90e3acc479a2 173
mbed_official 157:90e3acc479a2 174 if (slave == 0) {
mbed_official 157:90e3acc479a2 175 obj->mode = SPI_Mode_Master;
mbed_official 157:90e3acc479a2 176 obj->nss = SPI_NSS_Soft;
mbed_official 157:90e3acc479a2 177 } else {
mbed_official 157:90e3acc479a2 178 obj->mode = SPI_Mode_Slave;
mbed_official 227:7bd0639b8911 179 obj->nss = SPI_NSS_Hard;
mbed_official 157:90e3acc479a2 180 }
mbed_official 157:90e3acc479a2 181
mbed_official 157:90e3acc479a2 182 init_spi(obj);
mbed_official 157:90e3acc479a2 183 }
mbed_official 157:90e3acc479a2 184
mbed_official 157:90e3acc479a2 185 void spi_frequency(spi_t *obj, int hz) {
mbed_official 157:90e3acc479a2 186 // Values depend of PCLK1: 32 MHz if HSI is used, 36 MHz if HSE is used
mbed_official 157:90e3acc479a2 187 if (hz < 250000) {
mbed_official 157:90e3acc479a2 188 obj->br_presc = SPI_BaudRatePrescaler_256; // 125 kHz - 141 kHz
mbed_official 157:90e3acc479a2 189 } else if ((hz >= 250000) && (hz < 500000)) {
mbed_official 157:90e3acc479a2 190 obj->br_presc = SPI_BaudRatePrescaler_128; // 250 kHz - 280 kHz
mbed_official 157:90e3acc479a2 191 } else if ((hz >= 500000) && (hz < 1000000)) {
mbed_official 157:90e3acc479a2 192 obj->br_presc = SPI_BaudRatePrescaler_64; // 500 kHz - 560 kHz
mbed_official 157:90e3acc479a2 193 } else if ((hz >= 1000000) && (hz < 2000000)) {
mbed_official 157:90e3acc479a2 194 obj->br_presc = SPI_BaudRatePrescaler_32; // 1 MHz - 1.13 MHz
mbed_official 157:90e3acc479a2 195 } else if ((hz >= 2000000) && (hz < 4000000)) {
mbed_official 157:90e3acc479a2 196 obj->br_presc = SPI_BaudRatePrescaler_16; // 2 MHz - 2.25 MHz
mbed_official 157:90e3acc479a2 197 } else if ((hz >= 4000000) && (hz < 8000000)) {
mbed_official 157:90e3acc479a2 198 obj->br_presc = SPI_BaudRatePrescaler_8; // 4 MHz - 4.5 MHz
mbed_official 157:90e3acc479a2 199 } else if ((hz >= 8000000) && (hz < 16000000)) {
mbed_official 157:90e3acc479a2 200 obj->br_presc = SPI_BaudRatePrescaler_4; // 8 MHz - 9 MHz
mbed_official 157:90e3acc479a2 201 } else { // >= 16000000
mbed_official 157:90e3acc479a2 202 obj->br_presc = SPI_BaudRatePrescaler_2; // 16 MHz - 18 MHz
mbed_official 157:90e3acc479a2 203 }
mbed_official 157:90e3acc479a2 204 init_spi(obj);
mbed_official 157:90e3acc479a2 205 }
mbed_official 157:90e3acc479a2 206
mbed_official 157:90e3acc479a2 207 static inline int ssp_readable(spi_t *obj) {
mbed_official 157:90e3acc479a2 208 int status;
mbed_official 157:90e3acc479a2 209 SPI_TypeDef *spi = (SPI_TypeDef *)(obj->spi);
mbed_official 157:90e3acc479a2 210 // Check if data is received
mbed_official 157:90e3acc479a2 211 status = ((SPI_I2S_GetFlagStatus(spi, SPI_I2S_FLAG_RXNE) != RESET) ? 1 : 0);
mbed_official 227:7bd0639b8911 212 return status;
mbed_official 157:90e3acc479a2 213 }
mbed_official 157:90e3acc479a2 214
mbed_official 157:90e3acc479a2 215 static inline int ssp_writeable(spi_t *obj) {
mbed_official 157:90e3acc479a2 216 int status;
mbed_official 157:90e3acc479a2 217 SPI_TypeDef *spi = (SPI_TypeDef *)(obj->spi);
mbed_official 157:90e3acc479a2 218 // Check if data is transmitted
mbed_official 157:90e3acc479a2 219 status = ((SPI_I2S_GetFlagStatus(spi, SPI_I2S_FLAG_TXE) != RESET) ? 1 : 0);
mbed_official 157:90e3acc479a2 220 return status;
mbed_official 157:90e3acc479a2 221 }
mbed_official 157:90e3acc479a2 222
mbed_official 157:90e3acc479a2 223 static inline void ssp_write(spi_t *obj, int value) {
mbed_official 227:7bd0639b8911 224 SPI_TypeDef *spi = (SPI_TypeDef *)(obj->spi);
mbed_official 157:90e3acc479a2 225 while (!ssp_writeable(obj));
mbed_official 157:90e3acc479a2 226 if (obj->bits == SPI_DataSize_8b) {
mbed_official 157:90e3acc479a2 227 SPI_SendData8(spi, (uint8_t)value);
mbed_official 157:90e3acc479a2 228 } else {
mbed_official 157:90e3acc479a2 229 SPI_I2S_SendData16(spi, (uint16_t)value);
mbed_official 157:90e3acc479a2 230 }
mbed_official 157:90e3acc479a2 231 }
mbed_official 157:90e3acc479a2 232
mbed_official 157:90e3acc479a2 233 static inline int ssp_read(spi_t *obj) {
mbed_official 227:7bd0639b8911 234 SPI_TypeDef *spi = (SPI_TypeDef *)(obj->spi);
mbed_official 157:90e3acc479a2 235 while (!ssp_readable(obj));
mbed_official 157:90e3acc479a2 236 if (obj->bits == SPI_DataSize_8b) {
mbed_official 157:90e3acc479a2 237 return (int)SPI_ReceiveData8(spi);
mbed_official 157:90e3acc479a2 238 } else {
mbed_official 157:90e3acc479a2 239 return (int)SPI_I2S_ReceiveData16(spi);
mbed_official 157:90e3acc479a2 240 }
mbed_official 157:90e3acc479a2 241 }
mbed_official 157:90e3acc479a2 242
mbed_official 157:90e3acc479a2 243 static inline int ssp_busy(spi_t *obj) {
mbed_official 157:90e3acc479a2 244 int status;
mbed_official 157:90e3acc479a2 245 SPI_TypeDef *spi = (SPI_TypeDef *)(obj->spi);
mbed_official 157:90e3acc479a2 246 status = ((SPI_I2S_GetFlagStatus(spi, SPI_I2S_FLAG_BSY) != RESET) ? 1 : 0);
mbed_official 157:90e3acc479a2 247 return status;
mbed_official 157:90e3acc479a2 248 }
mbed_official 157:90e3acc479a2 249
mbed_official 157:90e3acc479a2 250 int spi_master_write(spi_t *obj, int value) {
mbed_official 157:90e3acc479a2 251 ssp_write(obj, value);
mbed_official 157:90e3acc479a2 252 return ssp_read(obj);
mbed_official 157:90e3acc479a2 253 }
mbed_official 157:90e3acc479a2 254
mbed_official 157:90e3acc479a2 255 int spi_slave_receive(spi_t *obj) {
mbed_official 241:ffe41b0c8126 256 return ((ssp_readable(obj) && !ssp_busy(obj)) ? 1 : 0);
mbed_official 157:90e3acc479a2 257 };
mbed_official 157:90e3acc479a2 258
mbed_official 157:90e3acc479a2 259 int spi_slave_read(spi_t *obj) {
mbed_official 157:90e3acc479a2 260 SPI_TypeDef *spi = (SPI_TypeDef *)(obj->spi);
mbed_official 157:90e3acc479a2 261 if (obj->bits == SPI_DataSize_8b) {
mbed_official 157:90e3acc479a2 262 return (int)SPI_ReceiveData8(spi);
mbed_official 157:90e3acc479a2 263 } else {
mbed_official 157:90e3acc479a2 264 return (int)SPI_I2S_ReceiveData16(spi);
mbed_official 157:90e3acc479a2 265 }
mbed_official 157:90e3acc479a2 266 }
mbed_official 157:90e3acc479a2 267
mbed_official 157:90e3acc479a2 268 void spi_slave_write(spi_t *obj, int value) {
mbed_official 227:7bd0639b8911 269 SPI_TypeDef *spi = (SPI_TypeDef *)(obj->spi);
mbed_official 227:7bd0639b8911 270 while (!ssp_writeable(obj));
mbed_official 157:90e3acc479a2 271 if (obj->bits == SPI_DataSize_8b) {
mbed_official 157:90e3acc479a2 272 SPI_SendData8(spi, (uint8_t)value);
mbed_official 157:90e3acc479a2 273 } else {
mbed_official 157:90e3acc479a2 274 SPI_I2S_SendData16(spi, (uint16_t)value);
mbed_official 157:90e3acc479a2 275 }
mbed_official 157:90e3acc479a2 276 }
mbed_official 157:90e3acc479a2 277
mbed_official 157:90e3acc479a2 278 int spi_busy(spi_t *obj) {
mbed_official 157:90e3acc479a2 279 return ssp_busy(obj);
mbed_official 157:90e3acc479a2 280 }
mbed_official 157:90e3acc479a2 281
mbed_official 157:90e3acc479a2 282 #endif