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mbed library sources

Dependents:   Encrypted my_mbed lklk CyaSSL_DTLS_Cellular ... more

Superseded

This library was superseded by mbed-dev - https://os.mbed.com/users/mbed_official/code/mbed-dev/.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

Import librarymbed

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_DISCO_F303VC/spi_api.c@393:17d2d502961d, 2014-11-07 (annotated)

Committer:
mbed_official
Date:
Fri Nov 07 12:00:11 2014 +0000
Revision:
393:17d2d502961d
Parent:
241:ffe41b0c8126
Child:
403:91a4bea587f4
Synchronized with git revision 78a3d4f2301aad7367e924e8231b4411d11038ea



Full URL: https://github.com/mbedmicro/mbed/commit/78a3d4f2301aad7367e924e8231b4411d11038ea/



Toolchain: NUCLEO_F0 - Add missing files for IAR exporter

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