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This library was superseded by mbed-dev - https://os.mbed.com/users/mbed_official/code/mbed-dev/.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

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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_STM32F7/spi_api.c@573:ad23fe03a082, 2015-06-19 (annotated)

Committer:
mbed_official
Date:
Fri Jun 19 09:15:11 2015 +0100
Revision:
573:ad23fe03a082
Child:
582:a89625bcd809
Synchronized with git revision d47834cd4d729e5b36b4c1ad4650f8b8f6a9ab86



Full URL: https://github.com/mbedmicro/mbed/commit/d47834cd4d729e5b36b4c1ad4650f8b8f6a9ab86/



DISCO_F746NG - Add new target

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 573:ad23fe03a082 1 /* mbed Microcontroller Library
mbed_official 573:ad23fe03a082 2 *******************************************************************************
mbed_official 573:ad23fe03a082 3 * Copyright (c) 2015, STMicroelectronics
mbed_official 573:ad23fe03a082 4 * All rights reserved.
mbed_official 573:ad23fe03a082 5 *
mbed_official 573:ad23fe03a082 6 * Redistribution and use in source and binary forms, with or without
mbed_official 573:ad23fe03a082 7 * modification, are permitted provided that the following conditions are met:
mbed_official 573:ad23fe03a082 8 *
mbed_official 573:ad23fe03a082 9 * 1. Redistributions of source code must retain the above copyright notice,
mbed_official 573:ad23fe03a082 10 * this list of conditions and the following disclaimer.
mbed_official 573:ad23fe03a082 11 * 2. Redistributions in binary form must reproduce the above copyright notice,
mbed_official 573:ad23fe03a082 12 * this list of conditions and the following disclaimer in the documentation
mbed_official 573:ad23fe03a082 13 * and/or other materials provided with the distribution.
mbed_official 573:ad23fe03a082 14 * 3. Neither the name of STMicroelectronics nor the names of its contributors
mbed_official 573:ad23fe03a082 15 * may be used to endorse or promote products derived from this software
mbed_official 573:ad23fe03a082 16 * without specific prior written permission.
mbed_official 573:ad23fe03a082 17 *
mbed_official 573:ad23fe03a082 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
mbed_official 573:ad23fe03a082 19 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
mbed_official 573:ad23fe03a082 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
mbed_official 573:ad23fe03a082 21 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
mbed_official 573:ad23fe03a082 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
mbed_official 573:ad23fe03a082 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
mbed_official 573:ad23fe03a082 24 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
mbed_official 573:ad23fe03a082 25 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
mbed_official 573:ad23fe03a082 26 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
mbed_official 573:ad23fe03a082 27 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
mbed_official 573:ad23fe03a082 28 *******************************************************************************
mbed_official 573:ad23fe03a082 29 */
mbed_official 573:ad23fe03a082 30 #include "mbed_assert.h"
mbed_official 573:ad23fe03a082 31 #include "spi_api.h"
mbed_official 573:ad23fe03a082 32
mbed_official 573:ad23fe03a082 33 #if DEVICE_SPI
mbed_official 573:ad23fe03a082 34
mbed_official 573:ad23fe03a082 35 #include <math.h>
mbed_official 573:ad23fe03a082 36 #include "cmsis.h"
mbed_official 573:ad23fe03a082 37 #include "pinmap.h"
mbed_official 573:ad23fe03a082 38 #include "PeripheralPins.h"
mbed_official 573:ad23fe03a082 39
mbed_official 573:ad23fe03a082 40 static SPI_HandleTypeDef SpiHandle;
mbed_official 573:ad23fe03a082 41
mbed_official 573:ad23fe03a082 42 static void init_spi(spi_t *obj)
mbed_official 573:ad23fe03a082 43 {
mbed_official 573:ad23fe03a082 44 SpiHandle.Instance = (SPI_TypeDef *)(obj->spi);
mbed_official 573:ad23fe03a082 45
mbed_official 573:ad23fe03a082 46 __HAL_SPI_DISABLE(&SpiHandle);
mbed_official 573:ad23fe03a082 47
mbed_official 573:ad23fe03a082 48 SpiHandle.Init.Mode = obj->mode;
mbed_official 573:ad23fe03a082 49 SpiHandle.Init.BaudRatePrescaler = obj->br_presc;
mbed_official 573:ad23fe03a082 50 SpiHandle.Init.Direction = SPI_DIRECTION_2LINES;
mbed_official 573:ad23fe03a082 51 SpiHandle.Init.CLKPhase = obj->cpha;
mbed_official 573:ad23fe03a082 52 SpiHandle.Init.CLKPolarity = obj->cpol;
mbed_official 573:ad23fe03a082 53 SpiHandle.Init.CRCCalculation = SPI_CRCCALCULATION_DISABLED;
mbed_official 573:ad23fe03a082 54 SpiHandle.Init.CRCPolynomial = 7;
mbed_official 573:ad23fe03a082 55 SpiHandle.Init.DataSize = obj->bits;
mbed_official 573:ad23fe03a082 56 SpiHandle.Init.FirstBit = SPI_FIRSTBIT_MSB;
mbed_official 573:ad23fe03a082 57 SpiHandle.Init.NSS = obj->nss;
mbed_official 573:ad23fe03a082 58 SpiHandle.Init.TIMode = SPI_TIMODE_DISABLED;
mbed_official 573:ad23fe03a082 59
mbed_official 573:ad23fe03a082 60 HAL_SPI_Init(&SpiHandle);
mbed_official 573:ad23fe03a082 61
mbed_official 573:ad23fe03a082 62 __HAL_SPI_ENABLE(&SpiHandle);
mbed_official 573:ad23fe03a082 63 }
mbed_official 573:ad23fe03a082 64
mbed_official 573:ad23fe03a082 65 void spi_init(spi_t *obj, PinName mosi, PinName miso, PinName sclk, PinName ssel)
mbed_official 573:ad23fe03a082 66 {
mbed_official 573:ad23fe03a082 67 // Determine the SPI to use
mbed_official 573:ad23fe03a082 68 SPIName spi_mosi = (SPIName)pinmap_peripheral(mosi, PinMap_SPI_MOSI);
mbed_official 573:ad23fe03a082 69 SPIName spi_miso = (SPIName)pinmap_peripheral(miso, PinMap_SPI_MISO);
mbed_official 573:ad23fe03a082 70 SPIName spi_sclk = (SPIName)pinmap_peripheral(sclk, PinMap_SPI_SCLK);
mbed_official 573:ad23fe03a082 71 SPIName spi_ssel = (SPIName)pinmap_peripheral(ssel, PinMap_SPI_SSEL);
mbed_official 573:ad23fe03a082 72
mbed_official 573:ad23fe03a082 73 SPIName spi_data = (SPIName)pinmap_merge(spi_mosi, spi_miso);
mbed_official 573:ad23fe03a082 74 SPIName spi_cntl = (SPIName)pinmap_merge(spi_sclk, spi_ssel);
mbed_official 573:ad23fe03a082 75
mbed_official 573:ad23fe03a082 76 obj->spi = (SPIName)pinmap_merge(spi_data, spi_cntl);
mbed_official 573:ad23fe03a082 77 MBED_ASSERT(obj->spi != (SPIName)NC);
mbed_official 573:ad23fe03a082 78
mbed_official 573:ad23fe03a082 79 // Enable SPI clock
mbed_official 573:ad23fe03a082 80 if (obj->spi == SPI_1) {
mbed_official 573:ad23fe03a082 81 __SPI1_CLK_ENABLE();
mbed_official 573:ad23fe03a082 82 }
mbed_official 573:ad23fe03a082 83
mbed_official 573:ad23fe03a082 84 if (obj->spi == SPI_2) {
mbed_official 573:ad23fe03a082 85 __SPI2_CLK_ENABLE();
mbed_official 573:ad23fe03a082 86 }
mbed_official 573:ad23fe03a082 87
mbed_official 573:ad23fe03a082 88 if (obj->spi == SPI_3) {
mbed_official 573:ad23fe03a082 89 __SPI3_CLK_ENABLE();
mbed_official 573:ad23fe03a082 90 }
mbed_official 573:ad23fe03a082 91
mbed_official 573:ad23fe03a082 92 #if defined SPI4_BASE
mbed_official 573:ad23fe03a082 93 if (obj->spi == SPI_4) {
mbed_official 573:ad23fe03a082 94 __SPI4_CLK_ENABLE();
mbed_official 573:ad23fe03a082 95 }
mbed_official 573:ad23fe03a082 96 #endif
mbed_official 573:ad23fe03a082 97
mbed_official 573:ad23fe03a082 98 #if defined SPI5_BASE
mbed_official 573:ad23fe03a082 99 if (obj->spi == SPI_5) {
mbed_official 573:ad23fe03a082 100 __SPI5_CLK_ENABLE();
mbed_official 573:ad23fe03a082 101 }
mbed_official 573:ad23fe03a082 102 #endif
mbed_official 573:ad23fe03a082 103
mbed_official 573:ad23fe03a082 104 // Configure the SPI pins
mbed_official 573:ad23fe03a082 105 pinmap_pinout(mosi, PinMap_SPI_MOSI);
mbed_official 573:ad23fe03a082 106 pinmap_pinout(miso, PinMap_SPI_MISO);
mbed_official 573:ad23fe03a082 107 pinmap_pinout(sclk, PinMap_SPI_SCLK);
mbed_official 573:ad23fe03a082 108
mbed_official 573:ad23fe03a082 109 // Save new values
mbed_official 573:ad23fe03a082 110 obj->bits = SPI_DATASIZE_8BIT;
mbed_official 573:ad23fe03a082 111 obj->cpol = SPI_POLARITY_LOW;
mbed_official 573:ad23fe03a082 112 obj->cpha = SPI_PHASE_1EDGE;
mbed_official 573:ad23fe03a082 113 obj->br_presc = SPI_BAUDRATEPRESCALER_256;
mbed_official 573:ad23fe03a082 114
mbed_official 573:ad23fe03a082 115 obj->pin_miso = miso;
mbed_official 573:ad23fe03a082 116 obj->pin_mosi = mosi;
mbed_official 573:ad23fe03a082 117 obj->pin_sclk = sclk;
mbed_official 573:ad23fe03a082 118 obj->pin_ssel = ssel;
mbed_official 573:ad23fe03a082 119
mbed_official 573:ad23fe03a082 120 if (ssel != NC) {
mbed_official 573:ad23fe03a082 121 pinmap_pinout(ssel, PinMap_SPI_SSEL);
mbed_official 573:ad23fe03a082 122 } else {
mbed_official 573:ad23fe03a082 123 obj->nss = SPI_NSS_SOFT;
mbed_official 573:ad23fe03a082 124 }
mbed_official 573:ad23fe03a082 125
mbed_official 573:ad23fe03a082 126 init_spi(obj);
mbed_official 573:ad23fe03a082 127 }
mbed_official 573:ad23fe03a082 128
mbed_official 573:ad23fe03a082 129 void spi_free(spi_t *obj)
mbed_official 573:ad23fe03a082 130 {
mbed_official 573:ad23fe03a082 131 // Reset SPI and disable clock
mbed_official 573:ad23fe03a082 132 if (obj->spi == SPI_1) {
mbed_official 573:ad23fe03a082 133 __SPI1_FORCE_RESET();
mbed_official 573:ad23fe03a082 134 __SPI1_RELEASE_RESET();
mbed_official 573:ad23fe03a082 135 __SPI1_CLK_DISABLE();
mbed_official 573:ad23fe03a082 136 }
mbed_official 573:ad23fe03a082 137
mbed_official 573:ad23fe03a082 138 if (obj->spi == SPI_2) {
mbed_official 573:ad23fe03a082 139 __SPI2_FORCE_RESET();
mbed_official 573:ad23fe03a082 140 __SPI2_RELEASE_RESET();
mbed_official 573:ad23fe03a082 141 __SPI2_CLK_DISABLE();
mbed_official 573:ad23fe03a082 142 }
mbed_official 573:ad23fe03a082 143
mbed_official 573:ad23fe03a082 144 if (obj->spi == SPI_3) {
mbed_official 573:ad23fe03a082 145 __SPI3_FORCE_RESET();
mbed_official 573:ad23fe03a082 146 __SPI3_RELEASE_RESET();
mbed_official 573:ad23fe03a082 147 __SPI3_CLK_DISABLE();
mbed_official 573:ad23fe03a082 148 }
mbed_official 573:ad23fe03a082 149
mbed_official 573:ad23fe03a082 150 #if defined SPI4_BASE
mbed_official 573:ad23fe03a082 151 if (obj->spi == SPI_4) {
mbed_official 573:ad23fe03a082 152 __SPI4_FORCE_RESET();
mbed_official 573:ad23fe03a082 153 __SPI4_RELEASE_RESET();
mbed_official 573:ad23fe03a082 154 __SPI4_CLK_DISABLE();
mbed_official 573:ad23fe03a082 155 }
mbed_official 573:ad23fe03a082 156 #endif
mbed_official 573:ad23fe03a082 157
mbed_official 573:ad23fe03a082 158 #if defined SPI5_BASE
mbed_official 573:ad23fe03a082 159 if (obj->spi == SPI_5) {
mbed_official 573:ad23fe03a082 160 __SPI5_FORCE_RESET();
mbed_official 573:ad23fe03a082 161 __SPI5_RELEASE_RESET();
mbed_official 573:ad23fe03a082 162 __SPI5_CLK_DISABLE();
mbed_official 573:ad23fe03a082 163 }
mbed_official 573:ad23fe03a082 164 #endif
mbed_official 573:ad23fe03a082 165
mbed_official 573:ad23fe03a082 166 // Configure GPIOs
mbed_official 573:ad23fe03a082 167 pin_function(obj->pin_miso, STM_PIN_DATA(STM_MODE_INPUT, GPIO_NOPULL, 0));
mbed_official 573:ad23fe03a082 168 pin_function(obj->pin_mosi, STM_PIN_DATA(STM_MODE_INPUT, GPIO_NOPULL, 0));
mbed_official 573:ad23fe03a082 169 pin_function(obj->pin_sclk, STM_PIN_DATA(STM_MODE_INPUT, GPIO_NOPULL, 0));
mbed_official 573:ad23fe03a082 170 pin_function(obj->pin_ssel, STM_PIN_DATA(STM_MODE_INPUT, GPIO_NOPULL, 0));
mbed_official 573:ad23fe03a082 171 }
mbed_official 573:ad23fe03a082 172
mbed_official 573:ad23fe03a082 173 void spi_format(spi_t *obj, int bits, int mode, int slave)
mbed_official 573:ad23fe03a082 174 {
mbed_official 573:ad23fe03a082 175 // Save new values
mbed_official 573:ad23fe03a082 176 if (bits == 16) {
mbed_official 573:ad23fe03a082 177 obj->bits = SPI_DATASIZE_16BIT;
mbed_official 573:ad23fe03a082 178 } else {
mbed_official 573:ad23fe03a082 179 obj->bits = SPI_DATASIZE_8BIT;
mbed_official 573:ad23fe03a082 180 }
mbed_official 573:ad23fe03a082 181
mbed_official 573:ad23fe03a082 182 switch (mode) {
mbed_official 573:ad23fe03a082 183 case 0:
mbed_official 573:ad23fe03a082 184 obj->cpol = SPI_POLARITY_LOW;
mbed_official 573:ad23fe03a082 185 obj->cpha = SPI_PHASE_1EDGE;
mbed_official 573:ad23fe03a082 186 break;
mbed_official 573:ad23fe03a082 187 case 1:
mbed_official 573:ad23fe03a082 188 obj->cpol = SPI_POLARITY_LOW;
mbed_official 573:ad23fe03a082 189 obj->cpha = SPI_PHASE_2EDGE;
mbed_official 573:ad23fe03a082 190 break;
mbed_official 573:ad23fe03a082 191 case 2:
mbed_official 573:ad23fe03a082 192 obj->cpol = SPI_POLARITY_HIGH;
mbed_official 573:ad23fe03a082 193 obj->cpha = SPI_PHASE_1EDGE;
mbed_official 573:ad23fe03a082 194 break;
mbed_official 573:ad23fe03a082 195 default:
mbed_official 573:ad23fe03a082 196 obj->cpol = SPI_POLARITY_HIGH;
mbed_official 573:ad23fe03a082 197 obj->cpha = SPI_PHASE_2EDGE;
mbed_official 573:ad23fe03a082 198 break;
mbed_official 573:ad23fe03a082 199 }
mbed_official 573:ad23fe03a082 200
mbed_official 573:ad23fe03a082 201 if (obj->nss != SPI_NSS_SOFT) {
mbed_official 573:ad23fe03a082 202 obj->nss = (slave) ? SPI_NSS_HARD_INPUT : SPI_NSS_HARD_OUTPUT;
mbed_official 573:ad23fe03a082 203 }
mbed_official 573:ad23fe03a082 204
mbed_official 573:ad23fe03a082 205 obj->mode = (slave) ? SPI_MODE_SLAVE : SPI_MODE_MASTER;
mbed_official 573:ad23fe03a082 206
mbed_official 573:ad23fe03a082 207 init_spi(obj);
mbed_official 573:ad23fe03a082 208 }
mbed_official 573:ad23fe03a082 209
mbed_official 573:ad23fe03a082 210 void spi_frequency(spi_t *obj, int hz)
mbed_official 573:ad23fe03a082 211 {
mbed_official 573:ad23fe03a082 212 #if defined(TARGET_STM32F401RE) || defined(TARGET_STM32F401VC) || defined(TARGET_STM32F407VG)
mbed_official 573:ad23fe03a082 213 // Note: The frequencies are obtained with SPI1 clock = 84 MHz (APB2 clock)
mbed_official 573:ad23fe03a082 214 if (hz < 600000) {
mbed_official 573:ad23fe03a082 215 obj->br_presc = SPI_BAUDRATEPRESCALER_256; // 330 kHz
mbed_official 573:ad23fe03a082 216 } else if ((hz >= 600000) && (hz < 1000000)) {
mbed_official 573:ad23fe03a082 217 obj->br_presc = SPI_BAUDRATEPRESCALER_128; // 656 kHz
mbed_official 573:ad23fe03a082 218 } else if ((hz >= 1000000) && (hz < 2000000)) {
mbed_official 573:ad23fe03a082 219 obj->br_presc = SPI_BAUDRATEPRESCALER_64; // 1.3 MHz
mbed_official 573:ad23fe03a082 220 } else if ((hz >= 2000000) && (hz < 5000000)) {
mbed_official 573:ad23fe03a082 221 obj->br_presc = SPI_BAUDRATEPRESCALER_32; // 2.6 MHz
mbed_official 573:ad23fe03a082 222 } else if ((hz >= 5000000) && (hz < 10000000)) {
mbed_official 573:ad23fe03a082 223 obj->br_presc = SPI_BAUDRATEPRESCALER_16; // 5.25 MHz
mbed_official 573:ad23fe03a082 224 } else if ((hz >= 10000000) && (hz < 21000000)) {
mbed_official 573:ad23fe03a082 225 obj->br_presc = SPI_BAUDRATEPRESCALER_8; // 10.5 MHz
mbed_official 573:ad23fe03a082 226 } else if ((hz >= 21000000) && (hz < 42000000)) {
mbed_official 573:ad23fe03a082 227 obj->br_presc = SPI_BAUDRATEPRESCALER_4; // 21 MHz
mbed_official 573:ad23fe03a082 228 } else { // >= 42000000
mbed_official 573:ad23fe03a082 229 obj->br_presc = SPI_BAUDRATEPRESCALER_2; // 42 MHz
mbed_official 573:ad23fe03a082 230 }
mbed_official 573:ad23fe03a082 231 #elif defined(TARGET_STM32F405RG)
mbed_official 573:ad23fe03a082 232 // Note: The frequencies are obtained with SPI1 clock = 48 MHz (APB2 clock)
mbed_official 573:ad23fe03a082 233 if (obj->spi == SPI_1) {
mbed_official 573:ad23fe03a082 234 if (hz < 375000) {
mbed_official 573:ad23fe03a082 235 obj->br_presc = SPI_BAUDRATEPRESCALER_256; // 187.5 kHz
mbed_official 573:ad23fe03a082 236 } else if ((hz >= 375000) && (hz < 750000)) {
mbed_official 573:ad23fe03a082 237 obj->br_presc = SPI_BAUDRATEPRESCALER_128; // 375 kHz
mbed_official 573:ad23fe03a082 238 } else if ((hz >= 750000) && (hz < 1500000)) {
mbed_official 573:ad23fe03a082 239 obj->br_presc = SPI_BAUDRATEPRESCALER_64; // 0.75 MHz
mbed_official 573:ad23fe03a082 240 } else if ((hz >= 1500000) && (hz < 3000000)) {
mbed_official 573:ad23fe03a082 241 obj->br_presc = SPI_BAUDRATEPRESCALER_32; // 1.5 MHz
mbed_official 573:ad23fe03a082 242 } else if ((hz >= 3000000) && (hz < 6000000)) {
mbed_official 573:ad23fe03a082 243 obj->br_presc = SPI_BAUDRATEPRESCALER_16; // 3 MHz
mbed_official 573:ad23fe03a082 244 } else if ((hz >= 6000000) && (hz < 12000000)) {
mbed_official 573:ad23fe03a082 245 obj->br_presc = SPI_BAUDRATEPRESCALER_8; // 6 MHz
mbed_official 573:ad23fe03a082 246 } else if ((hz >= 12000000) && (hz < 24000000)) {
mbed_official 573:ad23fe03a082 247 obj->br_presc = SPI_BAUDRATEPRESCALER_4; // 12 MHz
mbed_official 573:ad23fe03a082 248 } else { // >= 24000000
mbed_official 573:ad23fe03a082 249 obj->br_presc = SPI_BAUDRATEPRESCALER_2; // 24 MHz
mbed_official 573:ad23fe03a082 250 }
mbed_official 573:ad23fe03a082 251 // Note: The frequencies are obtained with SPI2/3 clock = 48 MHz (APB1 clock)
mbed_official 573:ad23fe03a082 252 } else if ((obj->spi == SPI_2) || (obj->spi == SPI_3)) {
mbed_official 573:ad23fe03a082 253 if (hz < 375000) {
mbed_official 573:ad23fe03a082 254 obj->br_presc = SPI_BAUDRATEPRESCALER_256; // 187.5 kHz
mbed_official 573:ad23fe03a082 255 } else if ((hz >= 375000) && (hz < 750000)) {
mbed_official 573:ad23fe03a082 256 obj->br_presc = SPI_BAUDRATEPRESCALER_128; // 375 kHz
mbed_official 573:ad23fe03a082 257 } else if ((hz >= 750000) && (hz < 1500000)) {
mbed_official 573:ad23fe03a082 258 obj->br_presc = SPI_BAUDRATEPRESCALER_64; // 0.75 MHz
mbed_official 573:ad23fe03a082 259 } else if ((hz >= 1500000) && (hz < 3000000)) {
mbed_official 573:ad23fe03a082 260 obj->br_presc = SPI_BAUDRATEPRESCALER_32; // 1.5 MHz
mbed_official 573:ad23fe03a082 261 } else if ((hz >= 3000000) && (hz < 6000000)) {
mbed_official 573:ad23fe03a082 262 obj->br_presc = SPI_BAUDRATEPRESCALER_16; // 3 MHz
mbed_official 573:ad23fe03a082 263 } else if ((hz >= 6000000) && (hz < 12000000)) {
mbed_official 573:ad23fe03a082 264 obj->br_presc = SPI_BAUDRATEPRESCALER_8; // 6 MHz
mbed_official 573:ad23fe03a082 265 } else if ((hz >= 12000000) && (hz < 24000000)) {
mbed_official 573:ad23fe03a082 266 obj->br_presc = SPI_BAUDRATEPRESCALER_4; // 12 MHz
mbed_official 573:ad23fe03a082 267 } else { // >= 24000000
mbed_official 573:ad23fe03a082 268 obj->br_presc = SPI_BAUDRATEPRESCALER_2; // 24 MHz
mbed_official 573:ad23fe03a082 269 }
mbed_official 573:ad23fe03a082 270 }
mbed_official 573:ad23fe03a082 271 #elif defined(TARGET_STM32F411RE) || defined(TARGET_STM32F429ZI)
mbed_official 573:ad23fe03a082 272 // Values depend of PCLK2: 100 MHz
mbed_official 573:ad23fe03a082 273 if ((obj->spi == SPI_1) || (obj->spi == SPI_4) || (obj->spi == SPI_5)) {
mbed_official 573:ad23fe03a082 274 if (hz < 700000) {
mbed_official 573:ad23fe03a082 275 obj->br_presc = SPI_BAUDRATEPRESCALER_256; // 391 kHz
mbed_official 573:ad23fe03a082 276 } else if ((hz >= 700000) && (hz < 1000000)) {
mbed_official 573:ad23fe03a082 277 obj->br_presc = SPI_BAUDRATEPRESCALER_128; // 781 kHz
mbed_official 573:ad23fe03a082 278 } else if ((hz >= 1000000) && (hz < 3000000)) {
mbed_official 573:ad23fe03a082 279 obj->br_presc = SPI_BAUDRATEPRESCALER_64; // 1.56 MHz
mbed_official 573:ad23fe03a082 280 } else if ((hz >= 3000000) && (hz < 6000000)) {
mbed_official 573:ad23fe03a082 281 obj->br_presc = SPI_BAUDRATEPRESCALER_32; // 3.13 MHz
mbed_official 573:ad23fe03a082 282 } else if ((hz >= 6000000) && (hz < 12000000)) {
mbed_official 573:ad23fe03a082 283 obj->br_presc = SPI_BAUDRATEPRESCALER_16; // 6.25 MHz
mbed_official 573:ad23fe03a082 284 } else if ((hz >= 12000000) && (hz < 25000000)) {
mbed_official 573:ad23fe03a082 285 obj->br_presc = SPI_BAUDRATEPRESCALER_8; // 12.5 MHz
mbed_official 573:ad23fe03a082 286 } else if ((hz >= 25000000) && (hz < 50000000)) {
mbed_official 573:ad23fe03a082 287 obj->br_presc = SPI_BAUDRATEPRESCALER_4; // 25 MHz
mbed_official 573:ad23fe03a082 288 } else { // >= 50000000
mbed_official 573:ad23fe03a082 289 obj->br_presc = SPI_BAUDRATEPRESCALER_2; // 50 MHz
mbed_official 573:ad23fe03a082 290 }
mbed_official 573:ad23fe03a082 291 }
mbed_official 573:ad23fe03a082 292
mbed_official 573:ad23fe03a082 293 // Values depend of PCLK1: 50 MHz
mbed_official 573:ad23fe03a082 294 if ((obj->spi == SPI_2) || (obj->spi == SPI_3)) {
mbed_official 573:ad23fe03a082 295 if (hz < 400000) {
mbed_official 573:ad23fe03a082 296 obj->br_presc = SPI_BAUDRATEPRESCALER_256; // 195 kHz
mbed_official 573:ad23fe03a082 297 } else if ((hz >= 400000) && (hz < 700000)) {
mbed_official 573:ad23fe03a082 298 obj->br_presc = SPI_BAUDRATEPRESCALER_128; // 391 kHz
mbed_official 573:ad23fe03a082 299 } else if ((hz >= 700000) && (hz < 1000000)) {
mbed_official 573:ad23fe03a082 300 obj->br_presc = SPI_BAUDRATEPRESCALER_64; // 781 MHz
mbed_official 573:ad23fe03a082 301 } else if ((hz >= 1000000) && (hz < 3000000)) {
mbed_official 573:ad23fe03a082 302 obj->br_presc = SPI_BAUDRATEPRESCALER_32; // 1.56 MHz
mbed_official 573:ad23fe03a082 303 } else if ((hz >= 3000000) && (hz < 6000000)) {
mbed_official 573:ad23fe03a082 304 obj->br_presc = SPI_BAUDRATEPRESCALER_16; // 3.13 MHz
mbed_official 573:ad23fe03a082 305 } else if ((hz >= 6000000) && (hz < 12000000)) {
mbed_official 573:ad23fe03a082 306 obj->br_presc = SPI_BAUDRATEPRESCALER_8; // 6.25 MHz
mbed_official 573:ad23fe03a082 307 } else if ((hz >= 12000000) && (hz < 25000000)) {
mbed_official 573:ad23fe03a082 308 obj->br_presc = SPI_BAUDRATEPRESCALER_4; // 12.5 MHz
mbed_official 573:ad23fe03a082 309 } else { // >= 25000000
mbed_official 573:ad23fe03a082 310 obj->br_presc = SPI_BAUDRATEPRESCALER_2; // 25 MHz
mbed_official 573:ad23fe03a082 311 }
mbed_official 573:ad23fe03a082 312 }
mbed_official 573:ad23fe03a082 313 #endif
mbed_official 573:ad23fe03a082 314 init_spi(obj);
mbed_official 573:ad23fe03a082 315 }
mbed_official 573:ad23fe03a082 316
mbed_official 573:ad23fe03a082 317 static inline int ssp_readable(spi_t *obj)
mbed_official 573:ad23fe03a082 318 {
mbed_official 573:ad23fe03a082 319 int status;
mbed_official 573:ad23fe03a082 320 SpiHandle.Instance = (SPI_TypeDef *)(obj->spi);
mbed_official 573:ad23fe03a082 321 // Check if data is received
mbed_official 573:ad23fe03a082 322 status = ((__HAL_SPI_GET_FLAG(&SpiHandle, SPI_FLAG_RXNE) != RESET) ? 1 : 0);
mbed_official 573:ad23fe03a082 323 return status;
mbed_official 573:ad23fe03a082 324 }
mbed_official 573:ad23fe03a082 325
mbed_official 573:ad23fe03a082 326 static inline int ssp_writeable(spi_t *obj)
mbed_official 573:ad23fe03a082 327 {
mbed_official 573:ad23fe03a082 328 int status;
mbed_official 573:ad23fe03a082 329 SpiHandle.Instance = (SPI_TypeDef *)(obj->spi);
mbed_official 573:ad23fe03a082 330 // Check if data is transmitted
mbed_official 573:ad23fe03a082 331 status = ((__HAL_SPI_GET_FLAG(&SpiHandle, SPI_FLAG_TXE) != RESET) ? 1 : 0);
mbed_official 573:ad23fe03a082 332 return status;
mbed_official 573:ad23fe03a082 333 }
mbed_official 573:ad23fe03a082 334
mbed_official 573:ad23fe03a082 335 static inline void ssp_write(spi_t *obj, int value)
mbed_official 573:ad23fe03a082 336 {
mbed_official 573:ad23fe03a082 337 SPI_TypeDef *spi = (SPI_TypeDef *)(obj->spi);
mbed_official 573:ad23fe03a082 338 while (!ssp_writeable(obj));
mbed_official 573:ad23fe03a082 339 spi->DR = (uint16_t)value;
mbed_official 573:ad23fe03a082 340 }
mbed_official 573:ad23fe03a082 341
mbed_official 573:ad23fe03a082 342 static inline int ssp_read(spi_t *obj)
mbed_official 573:ad23fe03a082 343 {
mbed_official 573:ad23fe03a082 344 SPI_TypeDef *spi = (SPI_TypeDef *)(obj->spi);
mbed_official 573:ad23fe03a082 345 while (!ssp_readable(obj));
mbed_official 573:ad23fe03a082 346 return (int)spi->DR;
mbed_official 573:ad23fe03a082 347 }
mbed_official 573:ad23fe03a082 348
mbed_official 573:ad23fe03a082 349 static inline int ssp_busy(spi_t *obj)
mbed_official 573:ad23fe03a082 350 {
mbed_official 573:ad23fe03a082 351 int status;
mbed_official 573:ad23fe03a082 352 SpiHandle.Instance = (SPI_TypeDef *)(obj->spi);
mbed_official 573:ad23fe03a082 353 status = ((__HAL_SPI_GET_FLAG(&SpiHandle, SPI_FLAG_BSY) != RESET) ? 1 : 0);
mbed_official 573:ad23fe03a082 354 return status;
mbed_official 573:ad23fe03a082 355 }
mbed_official 573:ad23fe03a082 356
mbed_official 573:ad23fe03a082 357 int spi_master_write(spi_t *obj, int value)
mbed_official 573:ad23fe03a082 358 {
mbed_official 573:ad23fe03a082 359 ssp_write(obj, value);
mbed_official 573:ad23fe03a082 360 return ssp_read(obj);
mbed_official 573:ad23fe03a082 361 }
mbed_official 573:ad23fe03a082 362
mbed_official 573:ad23fe03a082 363 int spi_slave_receive(spi_t *obj)
mbed_official 573:ad23fe03a082 364 {
mbed_official 573:ad23fe03a082 365 return ((ssp_readable(obj) && !ssp_busy(obj)) ? 1 : 0);
mbed_official 573:ad23fe03a082 366 };
mbed_official 573:ad23fe03a082 367
mbed_official 573:ad23fe03a082 368 int spi_slave_read(spi_t *obj)
mbed_official 573:ad23fe03a082 369 {
mbed_official 573:ad23fe03a082 370 SPI_TypeDef *spi = (SPI_TypeDef *)(obj->spi);
mbed_official 573:ad23fe03a082 371 while (!ssp_readable(obj));
mbed_official 573:ad23fe03a082 372 return (int)spi->DR;
mbed_official 573:ad23fe03a082 373 }
mbed_official 573:ad23fe03a082 374
mbed_official 573:ad23fe03a082 375 void spi_slave_write(spi_t *obj, int value)
mbed_official 573:ad23fe03a082 376 {
mbed_official 573:ad23fe03a082 377 SPI_TypeDef *spi = (SPI_TypeDef *)(obj->spi);
mbed_official 573:ad23fe03a082 378 while (!ssp_writeable(obj));
mbed_official 573:ad23fe03a082 379 spi->DR = (uint16_t)value;
mbed_official 573:ad23fe03a082 380 }
mbed_official 573:ad23fe03a082 381
mbed_official 573:ad23fe03a082 382 int spi_busy(spi_t *obj)
mbed_official 573:ad23fe03a082 383 {
mbed_official 573:ad23fe03a082 384 return ssp_busy(obj);
mbed_official 573:ad23fe03a082 385 }
mbed_official 573:ad23fe03a082 386
mbed_official 573:ad23fe03a082 387 #endif