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Superseded

This library was superseded by mbed-dev - https://os.mbed.com/users/mbed_official/code/mbed-dev/.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_DISCO_F051R8/spi_api.c@268:402bcc0c870b, 2014-07-29 (annotated)

Committer:
mbed_official
Date:
Tue Jul 29 19:00:07 2014 +0100
Revision:
268:402bcc0c870b
Parent:
240:9a7c54113eaf
Child:
423:560d1a9f3083
Synchronized with git revision 490d1a6606b3138f165c5edf2f2370ca616587c0



Full URL: https://github.com/mbedmicro/mbed/commit/490d1a6606b3138f165c5edf2f2370ca616587c0/



[LPC1114] Sleep fix + some device.h settings

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 130:1dec54e4aec3 1 /* mbed Microcontroller Library
mbed_official 130:1dec54e4aec3 2 *******************************************************************************
mbed_official 130:1dec54e4aec3 3 * Copyright (c) 2014, STMicroelectronics
mbed_official 130:1dec54e4aec3 4 * All rights reserved.
mbed_official 130:1dec54e4aec3 5 *
mbed_official 130:1dec54e4aec3 6 * Redistribution and use in source and binary forms, with or without
mbed_official 130:1dec54e4aec3 7 * modification, are permitted provided that the following conditions are met:
mbed_official 130:1dec54e4aec3 8 *
mbed_official 130:1dec54e4aec3 9 * 1. Redistributions of source code must retain the above copyright notice,
mbed_official 130:1dec54e4aec3 10 * this list of conditions and the following disclaimer.
mbed_official 130:1dec54e4aec3 11 * 2. Redistributions in binary form must reproduce the above copyright notice,
mbed_official 130:1dec54e4aec3 12 * this list of conditions and the following disclaimer in the documentation
mbed_official 130:1dec54e4aec3 13 * and/or other materials provided with the distribution.
mbed_official 130:1dec54e4aec3 14 * 3. Neither the name of STMicroelectronics nor the names of its contributors
mbed_official 130:1dec54e4aec3 15 * may be used to endorse or promote products derived from this software
mbed_official 130:1dec54e4aec3 16 * without specific prior written permission.
mbed_official 130:1dec54e4aec3 17 *
mbed_official 130:1dec54e4aec3 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
mbed_official 130:1dec54e4aec3 19 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
mbed_official 130:1dec54e4aec3 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
mbed_official 130:1dec54e4aec3 21 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
mbed_official 130:1dec54e4aec3 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
mbed_official 130:1dec54e4aec3 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
mbed_official 130:1dec54e4aec3 24 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
mbed_official 130:1dec54e4aec3 25 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
mbed_official 130:1dec54e4aec3 26 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
mbed_official 130:1dec54e4aec3 27 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
mbed_official 130:1dec54e4aec3 28 *******************************************************************************
mbed_official 130:1dec54e4aec3 29 */
mbed_official 227:7bd0639b8911 30 #include "mbed_assert.h"
mbed_official 130:1dec54e4aec3 31 #include "spi_api.h"
mbed_official 130:1dec54e4aec3 32
mbed_official 130:1dec54e4aec3 33 #if DEVICE_SPI
mbed_official 130:1dec54e4aec3 34
mbed_official 130:1dec54e4aec3 35 #include <math.h>
mbed_official 130:1dec54e4aec3 36 #include "cmsis.h"
mbed_official 130:1dec54e4aec3 37 #include "pinmap.h"
mbed_official 130:1dec54e4aec3 38
mbed_official 130:1dec54e4aec3 39 static const PinMap PinMap_SPI_MOSI[] = {
mbed_official 130:1dec54e4aec3 40 {PA_7, SPI_1, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_NOPULL, GPIO_AF_0)},
mbed_official 240:9a7c54113eaf 41 {PB_5, SPI_1, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_NOPULL, GPIO_AF_0)},
mbed_official 240:9a7c54113eaf 42 {PB_15, SPI_2, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_NOPULL, GPIO_AF_0)},
mbed_official 130:1dec54e4aec3 43 {NC, NC, 0}
mbed_official 130:1dec54e4aec3 44 };
mbed_official 130:1dec54e4aec3 45
mbed_official 130:1dec54e4aec3 46 static const PinMap PinMap_SPI_MISO[] = {
mbed_official 130:1dec54e4aec3 47 {PA_6, SPI_1, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_NOPULL, GPIO_AF_0)},
mbed_official 240:9a7c54113eaf 48 {PB_4, SPI_1, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_NOPULL, GPIO_AF_0)},
mbed_official 240:9a7c54113eaf 49 {PB_14, SPI_2, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_NOPULL, GPIO_AF_0)},
mbed_official 130:1dec54e4aec3 50 {NC, NC, 0}
mbed_official 130:1dec54e4aec3 51 };
mbed_official 130:1dec54e4aec3 52
mbed_official 130:1dec54e4aec3 53 static const PinMap PinMap_SPI_SCLK[] = {
mbed_official 130:1dec54e4aec3 54 {PA_5, SPI_1, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_NOPULL, GPIO_AF_0)},
mbed_official 240:9a7c54113eaf 55 {PB_3, SPI_1, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_NOPULL, GPIO_AF_0)},
mbed_official 240:9a7c54113eaf 56 {PB_13, SPI_2, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_NOPULL, GPIO_AF_0)},
mbed_official 130:1dec54e4aec3 57 {NC, NC, 0}
mbed_official 130:1dec54e4aec3 58 };
mbed_official 130:1dec54e4aec3 59
mbed_official 130:1dec54e4aec3 60 // Only used in Slave mode
mbed_official 130:1dec54e4aec3 61 static const PinMap PinMap_SPI_SSEL[] = {
mbed_official 240:9a7c54113eaf 62 {PA_4, SPI_1, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_NOPULL, 0)},
mbed_official 240:9a7c54113eaf 63 {PA_15, SPI_1, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_NOPULL, 0)},
mbed_official 240:9a7c54113eaf 64 {PB_12, SPI_2, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_NOPULL, 0)},
mbed_official 130:1dec54e4aec3 65 {NC, NC, 0}
mbed_official 130:1dec54e4aec3 66 };
mbed_official 130:1dec54e4aec3 67
mbed_official 130:1dec54e4aec3 68 static void init_spi(spi_t *obj) {
mbed_official 130:1dec54e4aec3 69 SPI_TypeDef *spi = (SPI_TypeDef *)(obj->spi);
mbed_official 130:1dec54e4aec3 70 SPI_InitTypeDef SPI_InitStructure;
mbed_official 130:1dec54e4aec3 71
mbed_official 130:1dec54e4aec3 72 SPI_Cmd(spi, DISABLE);
mbed_official 130:1dec54e4aec3 73
mbed_official 130:1dec54e4aec3 74 SPI_InitStructure.SPI_Mode = obj->mode;
mbed_official 227:7bd0639b8911 75 SPI_InitStructure.SPI_NSS = obj->nss;
mbed_official 227:7bd0639b8911 76 SPI_InitStructure.SPI_Direction = SPI_Direction_2Lines_FullDuplex;
mbed_official 130:1dec54e4aec3 77 SPI_InitStructure.SPI_DataSize = obj->bits;
mbed_official 130:1dec54e4aec3 78 SPI_InitStructure.SPI_CPOL = obj->cpol;
mbed_official 227:7bd0639b8911 79 SPI_InitStructure.SPI_CPHA = obj->cpha;
mbed_official 130:1dec54e4aec3 80 SPI_InitStructure.SPI_BaudRatePrescaler = obj->br_presc;
mbed_official 130:1dec54e4aec3 81 SPI_InitStructure.SPI_FirstBit = SPI_FirstBit_MSB;
mbed_official 130:1dec54e4aec3 82 SPI_InitStructure.SPI_CRCPolynomial = 7;
mbed_official 130:1dec54e4aec3 83 SPI_Init(spi, &SPI_InitStructure);
mbed_official 130:1dec54e4aec3 84
mbed_official 130:1dec54e4aec3 85 SPI_RxFIFOThresholdConfig(spi, SPI_RxFIFOThreshold_QF);
mbed_official 130:1dec54e4aec3 86
mbed_official 130:1dec54e4aec3 87 SPI_Cmd(spi, ENABLE);
mbed_official 130:1dec54e4aec3 88 }
mbed_official 130:1dec54e4aec3 89
mbed_official 130:1dec54e4aec3 90 void spi_init(spi_t *obj, PinName mosi, PinName miso, PinName sclk, PinName ssel) {
mbed_official 130:1dec54e4aec3 91 // Determine the SPI to use
mbed_official 130:1dec54e4aec3 92 SPIName spi_mosi = (SPIName)pinmap_peripheral(mosi, PinMap_SPI_MOSI);
mbed_official 130:1dec54e4aec3 93 SPIName spi_miso = (SPIName)pinmap_peripheral(miso, PinMap_SPI_MISO);
mbed_official 130:1dec54e4aec3 94 SPIName spi_sclk = (SPIName)pinmap_peripheral(sclk, PinMap_SPI_SCLK);
mbed_official 130:1dec54e4aec3 95 SPIName spi_ssel = (SPIName)pinmap_peripheral(ssel, PinMap_SPI_SSEL);
mbed_official 130:1dec54e4aec3 96
mbed_official 130:1dec54e4aec3 97 SPIName spi_data = (SPIName)pinmap_merge(spi_mosi, spi_miso);
mbed_official 130:1dec54e4aec3 98 SPIName spi_cntl = (SPIName)pinmap_merge(spi_sclk, spi_ssel);
mbed_official 130:1dec54e4aec3 99
mbed_official 130:1dec54e4aec3 100 obj->spi = (SPIName)pinmap_merge(spi_data, spi_cntl);
mbed_official 227:7bd0639b8911 101 MBED_ASSERT(obj->spi != (SPIName)NC);
mbed_official 130:1dec54e4aec3 102
mbed_official 130:1dec54e4aec3 103 // Enable SPI clock
mbed_official 130:1dec54e4aec3 104 if (obj->spi == SPI_1) {
mbed_official 227:7bd0639b8911 105 RCC_APB2PeriphClockCmd(RCC_APB2Periph_SPI1, ENABLE);
mbed_official 130:1dec54e4aec3 106 }
mbed_official 130:1dec54e4aec3 107 if (obj->spi == SPI_2) {
mbed_official 227:7bd0639b8911 108 RCC_APB1PeriphClockCmd(RCC_APB1Periph_SPI2, ENABLE);
mbed_official 130:1dec54e4aec3 109 }
mbed_official 130:1dec54e4aec3 110
mbed_official 130:1dec54e4aec3 111 // Configure the SPI pins
mbed_official 130:1dec54e4aec3 112 pinmap_pinout(mosi, PinMap_SPI_MOSI);
mbed_official 130:1dec54e4aec3 113 pinmap_pinout(miso, PinMap_SPI_MISO);
mbed_official 130:1dec54e4aec3 114 pinmap_pinout(sclk, PinMap_SPI_SCLK);
mbed_official 130:1dec54e4aec3 115
mbed_official 130:1dec54e4aec3 116 // Save new values
mbed_official 130:1dec54e4aec3 117 obj->bits = SPI_DataSize_8b;
mbed_official 130:1dec54e4aec3 118 obj->cpol = SPI_CPOL_Low;
mbed_official 130:1dec54e4aec3 119 obj->cpha = SPI_CPHA_1Edge;
mbed_official 130:1dec54e4aec3 120 obj->br_presc = SPI_BaudRatePrescaler_8; // 1 MHz
mbed_official 130:1dec54e4aec3 121
mbed_official 240:9a7c54113eaf 122 obj->pin_miso = miso;
mbed_official 240:9a7c54113eaf 123 obj->pin_mosi = mosi;
mbed_official 240:9a7c54113eaf 124 obj->pin_sclk = sclk;
mbed_official 240:9a7c54113eaf 125 obj->pin_ssel = ssel;
mbed_official 240:9a7c54113eaf 126
mbed_official 130:1dec54e4aec3 127 if (ssel == NC) { // Master
mbed_official 130:1dec54e4aec3 128 obj->mode = SPI_Mode_Master;
mbed_official 130:1dec54e4aec3 129 obj->nss = SPI_NSS_Soft;
mbed_official 240:9a7c54113eaf 130 } else { // Slave
mbed_official 130:1dec54e4aec3 131 pinmap_pinout(ssel, PinMap_SPI_SSEL);
mbed_official 130:1dec54e4aec3 132 obj->mode = SPI_Mode_Slave;
mbed_official 240:9a7c54113eaf 133 obj->nss = SPI_NSS_Hard;
mbed_official 130:1dec54e4aec3 134 }
mbed_official 130:1dec54e4aec3 135
mbed_official 130:1dec54e4aec3 136 init_spi(obj);
mbed_official 130:1dec54e4aec3 137 }
mbed_official 130:1dec54e4aec3 138
mbed_official 130:1dec54e4aec3 139 void spi_free(spi_t *obj) {
mbed_official 240:9a7c54113eaf 140 // Reset SPI and disable clock
mbed_official 240:9a7c54113eaf 141 if (obj->spi == SPI_1) {
mbed_official 240:9a7c54113eaf 142 RCC_APB2PeriphResetCmd(RCC_APB2Periph_SPI1, ENABLE);
mbed_official 240:9a7c54113eaf 143 RCC_APB2PeriphResetCmd(RCC_APB2Periph_SPI1, DISABLE);
mbed_official 240:9a7c54113eaf 144 RCC_APB2PeriphClockCmd(RCC_APB2Periph_SPI1, DISABLE);
mbed_official 240:9a7c54113eaf 145 }
mbed_official 240:9a7c54113eaf 146
mbed_official 240:9a7c54113eaf 147 if (obj->spi == SPI_2) {
mbed_official 240:9a7c54113eaf 148 RCC_APB1PeriphResetCmd(RCC_APB1Periph_SPI2, ENABLE);
mbed_official 240:9a7c54113eaf 149 RCC_APB1PeriphResetCmd(RCC_APB1Periph_SPI2, DISABLE);
mbed_official 240:9a7c54113eaf 150 RCC_APB1PeriphClockCmd(RCC_APB1Periph_SPI2, DISABLE);
mbed_official 240:9a7c54113eaf 151 }
mbed_official 240:9a7c54113eaf 152
mbed_official 240:9a7c54113eaf 153 // Configure GPIOs
mbed_official 240:9a7c54113eaf 154 pin_function(obj->pin_miso, STM_PIN_DATA(GPIO_Mode_IN, 0, GPIO_PuPd_NOPULL, 0xFF));
mbed_official 240:9a7c54113eaf 155 pin_function(obj->pin_mosi, STM_PIN_DATA(GPIO_Mode_IN, 0, GPIO_PuPd_NOPULL, 0xFF));
mbed_official 240:9a7c54113eaf 156 pin_function(obj->pin_sclk, STM_PIN_DATA(GPIO_Mode_IN, 0, GPIO_PuPd_NOPULL, 0xFF));
mbed_official 240:9a7c54113eaf 157 pin_function(obj->pin_ssel, STM_PIN_DATA(GPIO_Mode_IN, 0, GPIO_PuPd_NOPULL, 0xFF));
mbed_official 130:1dec54e4aec3 158 }
mbed_official 130:1dec54e4aec3 159
mbed_official 227:7bd0639b8911 160 void spi_format(spi_t *obj, int bits, int mode, int slave) {
mbed_official 130:1dec54e4aec3 161 // Save new values
mbed_official 240:9a7c54113eaf 162 if (bits == 16) {
mbed_official 240:9a7c54113eaf 163 obj->bits = SPI_DataSize_16b;
mbed_official 240:9a7c54113eaf 164 } else {
mbed_official 130:1dec54e4aec3 165 obj->bits = SPI_DataSize_8b;
mbed_official 130:1dec54e4aec3 166 }
mbed_official 130:1dec54e4aec3 167
mbed_official 130:1dec54e4aec3 168 switch (mode) {
mbed_official 130:1dec54e4aec3 169 case 0:
mbed_official 130:1dec54e4aec3 170 obj->cpol = SPI_CPOL_Low;
mbed_official 130:1dec54e4aec3 171 obj->cpha = SPI_CPHA_1Edge;
mbed_official 130:1dec54e4aec3 172 break;
mbed_official 130:1dec54e4aec3 173 case 1:
mbed_official 130:1dec54e4aec3 174 obj->cpol = SPI_CPOL_Low;
mbed_official 130:1dec54e4aec3 175 obj->cpha = SPI_CPHA_2Edge;
mbed_official 130:1dec54e4aec3 176 break;
mbed_official 130:1dec54e4aec3 177 case 2:
mbed_official 130:1dec54e4aec3 178 obj->cpol = SPI_CPOL_High;
mbed_official 227:7bd0639b8911 179 obj->cpha = SPI_CPHA_1Edge;
mbed_official 130:1dec54e4aec3 180 break;
mbed_official 130:1dec54e4aec3 181 default:
mbed_official 130:1dec54e4aec3 182 obj->cpol = SPI_CPOL_High;
mbed_official 227:7bd0639b8911 183 obj->cpha = SPI_CPHA_2Edge;
mbed_official 130:1dec54e4aec3 184 break;
mbed_official 130:1dec54e4aec3 185 }
mbed_official 130:1dec54e4aec3 186
mbed_official 130:1dec54e4aec3 187 if (slave == 0) {
mbed_official 130:1dec54e4aec3 188 obj->mode = SPI_Mode_Master;
mbed_official 130:1dec54e4aec3 189 obj->nss = SPI_NSS_Soft;
mbed_official 240:9a7c54113eaf 190 } else {
mbed_official 130:1dec54e4aec3 191 obj->mode = SPI_Mode_Slave;
mbed_official 227:7bd0639b8911 192 obj->nss = SPI_NSS_Hard;
mbed_official 130:1dec54e4aec3 193 }
mbed_official 130:1dec54e4aec3 194
mbed_official 130:1dec54e4aec3 195 init_spi(obj);
mbed_official 130:1dec54e4aec3 196 }
mbed_official 130:1dec54e4aec3 197
mbed_official 130:1dec54e4aec3 198 void spi_frequency(spi_t *obj, int hz) {
mbed_official 240:9a7c54113eaf 199 // Note: The frequencies are obtained with SPI clock = 48 MHz (APB1 & APB2 clocks)
mbed_official 240:9a7c54113eaf 200 if (hz < 300000) {
mbed_official 240:9a7c54113eaf 201 obj->br_presc = SPI_BaudRatePrescaler_256; // 188 kHz
mbed_official 240:9a7c54113eaf 202 } else if ((hz >= 300000) && (hz < 700000)) {
mbed_official 240:9a7c54113eaf 203 obj->br_presc = SPI_BaudRatePrescaler_128; // 375 kHz
mbed_official 240:9a7c54113eaf 204 } else if ((hz >= 700000) && (hz < 1000000)) {
mbed_official 240:9a7c54113eaf 205 obj->br_presc = SPI_BaudRatePrescaler_64; // 750 kHz
mbed_official 240:9a7c54113eaf 206 } else if ((hz >= 1000000) && (hz < 3000000)) {
mbed_official 240:9a7c54113eaf 207 obj->br_presc = SPI_BaudRatePrescaler_32; // 1.5 MHz
mbed_official 240:9a7c54113eaf 208 } else if ((hz >= 3000000) && (hz < 6000000)) {
mbed_official 240:9a7c54113eaf 209 obj->br_presc = SPI_BaudRatePrescaler_16; // 3 MHz
mbed_official 240:9a7c54113eaf 210 } else if ((hz >= 6000000) && (hz < 12000000)) {
mbed_official 240:9a7c54113eaf 211 obj->br_presc = SPI_BaudRatePrescaler_8; // 6 MHz
mbed_official 240:9a7c54113eaf 212 } else if ((hz >= 12000000) && (hz < 24000000)) {
mbed_official 240:9a7c54113eaf 213 obj->br_presc = SPI_BaudRatePrescaler_4; // 12 MHz
mbed_official 240:9a7c54113eaf 214 } else { // >= 24000000
mbed_official 240:9a7c54113eaf 215 obj->br_presc = SPI_BaudRatePrescaler_2; // 24 MHz
mbed_official 240:9a7c54113eaf 216 }
mbed_official 130:1dec54e4aec3 217 init_spi(obj);
mbed_official 130:1dec54e4aec3 218 }
mbed_official 130:1dec54e4aec3 219
mbed_official 130:1dec54e4aec3 220 static inline int ssp_readable(spi_t *obj) {
mbed_official 130:1dec54e4aec3 221 int status;
mbed_official 130:1dec54e4aec3 222 SPI_TypeDef *spi = (SPI_TypeDef *)(obj->spi);
mbed_official 130:1dec54e4aec3 223 // Check if data is received
mbed_official 130:1dec54e4aec3 224 status = ((SPI_I2S_GetFlagStatus(spi, SPI_I2S_FLAG_RXNE) != RESET) ? 1 : 0);
mbed_official 227:7bd0639b8911 225 return status;
mbed_official 130:1dec54e4aec3 226 }
mbed_official 130:1dec54e4aec3 227
mbed_official 130:1dec54e4aec3 228 static inline int ssp_writeable(spi_t *obj) {
mbed_official 130:1dec54e4aec3 229 int status;
mbed_official 130:1dec54e4aec3 230 SPI_TypeDef *spi = (SPI_TypeDef *)(obj->spi);
mbed_official 130:1dec54e4aec3 231 // Check if data is transmitted
mbed_official 130:1dec54e4aec3 232 status = ((SPI_I2S_GetFlagStatus(spi, SPI_I2S_FLAG_TXE) != RESET) ? 1 : 0);
mbed_official 130:1dec54e4aec3 233 return status;
mbed_official 130:1dec54e4aec3 234 }
mbed_official 130:1dec54e4aec3 235
mbed_official 130:1dec54e4aec3 236 static inline void ssp_write(spi_t *obj, int value) {
mbed_official 227:7bd0639b8911 237 SPI_TypeDef *spi = (SPI_TypeDef *)(obj->spi);
mbed_official 130:1dec54e4aec3 238 while (!ssp_writeable(obj));
mbed_official 240:9a7c54113eaf 239 if (obj->bits == SPI_DataSize_8b) {
mbed_official 130:1dec54e4aec3 240 SPI_SendData8(spi, (uint8_t)value);
mbed_official 240:9a7c54113eaf 241 } else { // 16-bit
mbed_official 130:1dec54e4aec3 242 SPI_I2S_SendData16(spi, (uint16_t)value);
mbed_official 240:9a7c54113eaf 243 }
mbed_official 130:1dec54e4aec3 244 }
mbed_official 130:1dec54e4aec3 245
mbed_official 130:1dec54e4aec3 246 static inline int ssp_read(spi_t *obj) {
mbed_official 227:7bd0639b8911 247 SPI_TypeDef *spi = (SPI_TypeDef *)(obj->spi);
mbed_official 130:1dec54e4aec3 248 while (!ssp_readable(obj));
mbed_official 240:9a7c54113eaf 249 if (obj->bits == SPI_DataSize_8b) {
mbed_official 130:1dec54e4aec3 250 return (int)SPI_ReceiveData8(spi);
mbed_official 240:9a7c54113eaf 251 } else { // 16-bit
mbed_official 227:7bd0639b8911 252 return (int)SPI_I2S_ReceiveData16(spi);
mbed_official 240:9a7c54113eaf 253 }
mbed_official 130:1dec54e4aec3 254 }
mbed_official 130:1dec54e4aec3 255
mbed_official 130:1dec54e4aec3 256 static inline int ssp_busy(spi_t *obj) {
mbed_official 130:1dec54e4aec3 257 int status;
mbed_official 130:1dec54e4aec3 258 SPI_TypeDef *spi = (SPI_TypeDef *)(obj->spi);
mbed_official 130:1dec54e4aec3 259 status = ((SPI_I2S_GetFlagStatus(spi, SPI_I2S_FLAG_BSY) != RESET) ? 1 : 0);
mbed_official 130:1dec54e4aec3 260 return status;
mbed_official 130:1dec54e4aec3 261 }
mbed_official 130:1dec54e4aec3 262
mbed_official 130:1dec54e4aec3 263 int spi_master_write(spi_t *obj, int value) {
mbed_official 130:1dec54e4aec3 264 ssp_write(obj, value);
mbed_official 130:1dec54e4aec3 265 return ssp_read(obj);
mbed_official 130:1dec54e4aec3 266 }
mbed_official 130:1dec54e4aec3 267
mbed_official 130:1dec54e4aec3 268 int spi_slave_receive(spi_t *obj) {
mbed_official 240:9a7c54113eaf 269 return ((ssp_readable(obj) && !ssp_busy(obj)) ? 1 : 0);
mbed_official 130:1dec54e4aec3 270 };
mbed_official 130:1dec54e4aec3 271
mbed_official 130:1dec54e4aec3 272 int spi_slave_read(spi_t *obj) {
mbed_official 130:1dec54e4aec3 273 SPI_TypeDef *spi = (SPI_TypeDef *)(obj->spi);
mbed_official 240:9a7c54113eaf 274 if (obj->bits == SPI_DataSize_8b) {
mbed_official 130:1dec54e4aec3 275 return (int)SPI_ReceiveData8(spi);
mbed_official 240:9a7c54113eaf 276 } else { // 16-bit
mbed_official 227:7bd0639b8911 277 return (int)SPI_I2S_ReceiveData16(spi);
mbed_official 240:9a7c54113eaf 278 }
mbed_official 130:1dec54e4aec3 279 }
mbed_official 130:1dec54e4aec3 280
mbed_official 130:1dec54e4aec3 281 void spi_slave_write(spi_t *obj, int value) {
mbed_official 227:7bd0639b8911 282 SPI_TypeDef *spi = (SPI_TypeDef *)(obj->spi);
mbed_official 227:7bd0639b8911 283 while (!ssp_writeable(obj));
mbed_official 240:9a7c54113eaf 284 if (obj->bits == SPI_DataSize_8b) {
mbed_official 130:1dec54e4aec3 285 SPI_SendData8(spi, (uint8_t)value);
mbed_official 240:9a7c54113eaf 286 } else { // 16-bit
mbed_official 130:1dec54e4aec3 287 SPI_I2S_SendData16(spi, (uint16_t)value);
mbed_official 240:9a7c54113eaf 288 }
mbed_official 130:1dec54e4aec3 289 }
mbed_official 130:1dec54e4aec3 290
mbed_official 130:1dec54e4aec3 291 int spi_busy(spi_t *obj) {
mbed_official 130:1dec54e4aec3 292 return ssp_busy(obj);
mbed_official 130:1dec54e4aec3 293 }
mbed_official 130:1dec54e4aec3 294
mbed_official 130:1dec54e4aec3 295 #endif