marcus chiou / mbed-src

mbed library sources

Fork of mbed-src by mbed official

targets/hal/TARGET_STM/TARGET_STM32F4/spi_api.c@442:d916d321e60f, 2015-01-08 (annotated)

Committer:
mbed_official
Date:
Thu Jan 08 12:00:08 2015 +0000
Revision:
442:d916d321e60f
Child:
542:6693aa6d3ba3
Synchronized with git revision 2acefb66eb35837a685ce640b2b15e068d4ccf5b



Full URL: https://github.com/mbedmicro/mbed/commit/2acefb66eb35837a685ce640b2b15e068d4ccf5b/



NUCLEO_F334R8 - Fix issue with multiple ADC initialization

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 442:d916d321e60f 1 /* mbed Microcontroller Library
mbed_official 442:d916d321e60f 2 *******************************************************************************
mbed_official 442:d916d321e60f 3 * Copyright (c) 2014, STMicroelectronics
mbed_official 442:d916d321e60f 4 * All rights reserved.
mbed_official 442:d916d321e60f 5 *
mbed_official 442:d916d321e60f 6 * Redistribution and use in source and binary forms, with or without
mbed_official 442:d916d321e60f 7 * modification, are permitted provided that the following conditions are met:
mbed_official 442:d916d321e60f 8 *
mbed_official 442:d916d321e60f 9 * 1. Redistributions of source code must retain the above copyright notice,
mbed_official 442:d916d321e60f 10 * this list of conditions and the following disclaimer.
mbed_official 442:d916d321e60f 11 * 2. Redistributions in binary form must reproduce the above copyright notice,
mbed_official 442:d916d321e60f 12 * this list of conditions and the following disclaimer in the documentation
mbed_official 442:d916d321e60f 13 * and/or other materials provided with the distribution.
mbed_official 442:d916d321e60f 14 * 3. Neither the name of STMicroelectronics nor the names of its contributors
mbed_official 442:d916d321e60f 15 * may be used to endorse or promote products derived from this software
mbed_official 442:d916d321e60f 16 * without specific prior written permission.
mbed_official 442:d916d321e60f 17 *
mbed_official 442:d916d321e60f 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
mbed_official 442:d916d321e60f 19 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
mbed_official 442:d916d321e60f 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
mbed_official 442:d916d321e60f 21 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
mbed_official 442:d916d321e60f 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
mbed_official 442:d916d321e60f 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
mbed_official 442:d916d321e60f 24 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
mbed_official 442:d916d321e60f 25 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
mbed_official 442:d916d321e60f 26 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
mbed_official 442:d916d321e60f 27 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
mbed_official 442:d916d321e60f 28 *******************************************************************************
mbed_official 442:d916d321e60f 29 */
mbed_official 442:d916d321e60f 30 #include "mbed_assert.h"
mbed_official 442:d916d321e60f 31 #include "spi_api.h"
mbed_official 442:d916d321e60f 32
mbed_official 442:d916d321e60f 33 #if DEVICE_SPI
mbed_official 442:d916d321e60f 34
mbed_official 442:d916d321e60f 35 #include <math.h>
mbed_official 442:d916d321e60f 36 #include "cmsis.h"
mbed_official 442:d916d321e60f 37 #include "pinmap.h"
mbed_official 442:d916d321e60f 38 #include "PeripheralPins.h"
mbed_official 442:d916d321e60f 39
mbed_official 442:d916d321e60f 40 static SPI_HandleTypeDef SpiHandle;
mbed_official 442:d916d321e60f 41
mbed_official 442:d916d321e60f 42 static void init_spi(spi_t *obj)
mbed_official 442:d916d321e60f 43 {
mbed_official 442:d916d321e60f 44 SpiHandle.Instance = (SPI_TypeDef *)(obj->spi);
mbed_official 442:d916d321e60f 45
mbed_official 442:d916d321e60f 46 __HAL_SPI_DISABLE(&SpiHandle);
mbed_official 442:d916d321e60f 47
mbed_official 442:d916d321e60f 48 SpiHandle.Init.Mode = obj->mode;
mbed_official 442:d916d321e60f 49 SpiHandle.Init.BaudRatePrescaler = obj->br_presc;
mbed_official 442:d916d321e60f 50 SpiHandle.Init.Direction = SPI_DIRECTION_2LINES;
mbed_official 442:d916d321e60f 51 SpiHandle.Init.CLKPhase = obj->cpha;
mbed_official 442:d916d321e60f 52 SpiHandle.Init.CLKPolarity = obj->cpol;
mbed_official 442:d916d321e60f 53 SpiHandle.Init.CRCCalculation = SPI_CRCCALCULATION_DISABLED;
mbed_official 442:d916d321e60f 54 SpiHandle.Init.CRCPolynomial = 7;
mbed_official 442:d916d321e60f 55 SpiHandle.Init.DataSize = obj->bits;
mbed_official 442:d916d321e60f 56 SpiHandle.Init.FirstBit = SPI_FIRSTBIT_MSB;
mbed_official 442:d916d321e60f 57 SpiHandle.Init.NSS = obj->nss;
mbed_official 442:d916d321e60f 58 SpiHandle.Init.TIMode = SPI_TIMODE_DISABLED;
mbed_official 442:d916d321e60f 59
mbed_official 442:d916d321e60f 60 HAL_SPI_Init(&SpiHandle);
mbed_official 442:d916d321e60f 61
mbed_official 442:d916d321e60f 62 __HAL_SPI_ENABLE(&SpiHandle);
mbed_official 442:d916d321e60f 63 }
mbed_official 442:d916d321e60f 64
mbed_official 442:d916d321e60f 65 void spi_init(spi_t *obj, PinName mosi, PinName miso, PinName sclk, PinName ssel)
mbed_official 442:d916d321e60f 66 {
mbed_official 442:d916d321e60f 67 // Determine the SPI to use
mbed_official 442:d916d321e60f 68 SPIName spi_mosi = (SPIName)pinmap_peripheral(mosi, PinMap_SPI_MOSI);
mbed_official 442:d916d321e60f 69 SPIName spi_miso = (SPIName)pinmap_peripheral(miso, PinMap_SPI_MISO);
mbed_official 442:d916d321e60f 70 SPIName spi_sclk = (SPIName)pinmap_peripheral(sclk, PinMap_SPI_SCLK);
mbed_official 442:d916d321e60f 71 SPIName spi_ssel = (SPIName)pinmap_peripheral(ssel, PinMap_SPI_SSEL);
mbed_official 442:d916d321e60f 72
mbed_official 442:d916d321e60f 73 SPIName spi_data = (SPIName)pinmap_merge(spi_mosi, spi_miso);
mbed_official 442:d916d321e60f 74 SPIName spi_cntl = (SPIName)pinmap_merge(spi_sclk, spi_ssel);
mbed_official 442:d916d321e60f 75
mbed_official 442:d916d321e60f 76 obj->spi = (SPIName)pinmap_merge(spi_data, spi_cntl);
mbed_official 442:d916d321e60f 77 MBED_ASSERT(obj->spi != (SPIName)NC);
mbed_official 442:d916d321e60f 78
mbed_official 442:d916d321e60f 79 // Enable SPI clock
mbed_official 442:d916d321e60f 80 if (obj->spi == SPI_1) {
mbed_official 442:d916d321e60f 81 __SPI1_CLK_ENABLE();
mbed_official 442:d916d321e60f 82 }
mbed_official 442:d916d321e60f 83
mbed_official 442:d916d321e60f 84 if (obj->spi == SPI_2) {
mbed_official 442:d916d321e60f 85 __SPI2_CLK_ENABLE();
mbed_official 442:d916d321e60f 86 }
mbed_official 442:d916d321e60f 87
mbed_official 442:d916d321e60f 88 if (obj->spi == SPI_3) {
mbed_official 442:d916d321e60f 89 __SPI3_CLK_ENABLE();
mbed_official 442:d916d321e60f 90 }
mbed_official 442:d916d321e60f 91
mbed_official 442:d916d321e60f 92 #if defined SPI4_BASE
mbed_official 442:d916d321e60f 93 if (obj->spi == SPI_4) {
mbed_official 442:d916d321e60f 94 __SPI4_CLK_ENABLE();
mbed_official 442:d916d321e60f 95 }
mbed_official 442:d916d321e60f 96 #endif
mbed_official 442:d916d321e60f 97
mbed_official 442:d916d321e60f 98 #if defined SPI5_BASE
mbed_official 442:d916d321e60f 99 if (obj->spi == SPI_5) {
mbed_official 442:d916d321e60f 100 __SPI5_CLK_ENABLE();
mbed_official 442:d916d321e60f 101 }
mbed_official 442:d916d321e60f 102 #endif
mbed_official 442:d916d321e60f 103
mbed_official 442:d916d321e60f 104 // Configure the SPI pins
mbed_official 442:d916d321e60f 105 pinmap_pinout(mosi, PinMap_SPI_MOSI);
mbed_official 442:d916d321e60f 106 pinmap_pinout(miso, PinMap_SPI_MISO);
mbed_official 442:d916d321e60f 107 pinmap_pinout(sclk, PinMap_SPI_SCLK);
mbed_official 442:d916d321e60f 108
mbed_official 442:d916d321e60f 109 // Save new values
mbed_official 442:d916d321e60f 110 obj->bits = SPI_DATASIZE_8BIT;
mbed_official 442:d916d321e60f 111 obj->cpol = SPI_POLARITY_LOW;
mbed_official 442:d916d321e60f 112 obj->cpha = SPI_PHASE_1EDGE;
mbed_official 442:d916d321e60f 113 obj->br_presc = SPI_BAUDRATEPRESCALER_256;
mbed_official 442:d916d321e60f 114
mbed_official 442:d916d321e60f 115 obj->pin_miso = miso;
mbed_official 442:d916d321e60f 116 obj->pin_mosi = mosi;
mbed_official 442:d916d321e60f 117 obj->pin_sclk = sclk;
mbed_official 442:d916d321e60f 118 obj->pin_ssel = ssel;
mbed_official 442:d916d321e60f 119
mbed_official 442:d916d321e60f 120 if (ssel == NC) { // SW NSS Master mode
mbed_official 442:d916d321e60f 121 obj->mode = SPI_MODE_MASTER;
mbed_official 442:d916d321e60f 122 obj->nss = SPI_NSS_SOFT;
mbed_official 442:d916d321e60f 123 } else { // Slave
mbed_official 442:d916d321e60f 124 pinmap_pinout(ssel, PinMap_SPI_SSEL);
mbed_official 442:d916d321e60f 125 obj->mode = SPI_MODE_SLAVE;
mbed_official 442:d916d321e60f 126 obj->nss = SPI_NSS_HARD_INPUT;
mbed_official 442:d916d321e60f 127 }
mbed_official 442:d916d321e60f 128
mbed_official 442:d916d321e60f 129 init_spi(obj);
mbed_official 442:d916d321e60f 130 }
mbed_official 442:d916d321e60f 131
mbed_official 442:d916d321e60f 132 void spi_free(spi_t *obj)
mbed_official 442:d916d321e60f 133 {
mbed_official 442:d916d321e60f 134 // Reset SPI and disable clock
mbed_official 442:d916d321e60f 135 if (obj->spi == SPI_1) {
mbed_official 442:d916d321e60f 136 __SPI1_FORCE_RESET();
mbed_official 442:d916d321e60f 137 __SPI1_RELEASE_RESET();
mbed_official 442:d916d321e60f 138 __SPI1_CLK_DISABLE();
mbed_official 442:d916d321e60f 139 }
mbed_official 442:d916d321e60f 140
mbed_official 442:d916d321e60f 141 if (obj->spi == SPI_2) {
mbed_official 442:d916d321e60f 142 __SPI2_FORCE_RESET();
mbed_official 442:d916d321e60f 143 __SPI2_RELEASE_RESET();
mbed_official 442:d916d321e60f 144 __SPI2_CLK_DISABLE();
mbed_official 442:d916d321e60f 145 }
mbed_official 442:d916d321e60f 146
mbed_official 442:d916d321e60f 147 if (obj->spi == SPI_3) {
mbed_official 442:d916d321e60f 148 __SPI3_FORCE_RESET();
mbed_official 442:d916d321e60f 149 __SPI3_RELEASE_RESET();
mbed_official 442:d916d321e60f 150 __SPI3_CLK_DISABLE();
mbed_official 442:d916d321e60f 151 }
mbed_official 442:d916d321e60f 152
mbed_official 442:d916d321e60f 153 #if defined SPI4_BASE
mbed_official 442:d916d321e60f 154 if (obj->spi == SPI_4) {
mbed_official 442:d916d321e60f 155 __SPI4_FORCE_RESET();
mbed_official 442:d916d321e60f 156 __SPI4_RELEASE_RESET();
mbed_official 442:d916d321e60f 157 __SPI4_CLK_DISABLE();
mbed_official 442:d916d321e60f 158 }
mbed_official 442:d916d321e60f 159 #endif
mbed_official 442:d916d321e60f 160
mbed_official 442:d916d321e60f 161 #if defined SPI5_BASE
mbed_official 442:d916d321e60f 162 if (obj->spi == SPI_5) {
mbed_official 442:d916d321e60f 163 __SPI5_FORCE_RESET();
mbed_official 442:d916d321e60f 164 __SPI5_RELEASE_RESET();
mbed_official 442:d916d321e60f 165 __SPI5_CLK_DISABLE();
mbed_official 442:d916d321e60f 166 }
mbed_official 442:d916d321e60f 167 #endif
mbed_official 442:d916d321e60f 168
mbed_official 442:d916d321e60f 169 // Configure GPIOs
mbed_official 442:d916d321e60f 170 pin_function(obj->pin_miso, STM_PIN_DATA(STM_MODE_INPUT, GPIO_NOPULL, 0));
mbed_official 442:d916d321e60f 171 pin_function(obj->pin_mosi, STM_PIN_DATA(STM_MODE_INPUT, GPIO_NOPULL, 0));
mbed_official 442:d916d321e60f 172 pin_function(obj->pin_sclk, STM_PIN_DATA(STM_MODE_INPUT, GPIO_NOPULL, 0));
mbed_official 442:d916d321e60f 173 pin_function(obj->pin_ssel, STM_PIN_DATA(STM_MODE_INPUT, GPIO_NOPULL, 0));
mbed_official 442:d916d321e60f 174 }
mbed_official 442:d916d321e60f 175
mbed_official 442:d916d321e60f 176 void spi_format(spi_t *obj, int bits, int mode, int slave)
mbed_official 442:d916d321e60f 177 {
mbed_official 442:d916d321e60f 178 // Save new values
mbed_official 442:d916d321e60f 179 if (bits == 16) {
mbed_official 442:d916d321e60f 180 obj->bits = SPI_DATASIZE_16BIT;
mbed_official 442:d916d321e60f 181 } else {
mbed_official 442:d916d321e60f 182 obj->bits = SPI_DATASIZE_8BIT;
mbed_official 442:d916d321e60f 183 }
mbed_official 442:d916d321e60f 184
mbed_official 442:d916d321e60f 185 switch (mode) {
mbed_official 442:d916d321e60f 186 case 0:
mbed_official 442:d916d321e60f 187 obj->cpol = SPI_POLARITY_LOW;
mbed_official 442:d916d321e60f 188 obj->cpha = SPI_PHASE_1EDGE;
mbed_official 442:d916d321e60f 189 break;
mbed_official 442:d916d321e60f 190 case 1:
mbed_official 442:d916d321e60f 191 obj->cpol = SPI_POLARITY_LOW;
mbed_official 442:d916d321e60f 192 obj->cpha = SPI_PHASE_2EDGE;
mbed_official 442:d916d321e60f 193 break;
mbed_official 442:d916d321e60f 194 case 2:
mbed_official 442:d916d321e60f 195 obj->cpol = SPI_POLARITY_HIGH;
mbed_official 442:d916d321e60f 196 obj->cpha = SPI_PHASE_1EDGE;
mbed_official 442:d916d321e60f 197 break;
mbed_official 442:d916d321e60f 198 default:
mbed_official 442:d916d321e60f 199 obj->cpol = SPI_POLARITY_HIGH;
mbed_official 442:d916d321e60f 200 obj->cpha = SPI_PHASE_2EDGE;
mbed_official 442:d916d321e60f 201 break;
mbed_official 442:d916d321e60f 202 }
mbed_official 442:d916d321e60f 203
mbed_official 442:d916d321e60f 204 if (slave == 0) {
mbed_official 442:d916d321e60f 205 obj->mode = SPI_MODE_MASTER;
mbed_official 442:d916d321e60f 206 obj->nss = SPI_NSS_SOFT;
mbed_official 442:d916d321e60f 207 } else {
mbed_official 442:d916d321e60f 208 obj->mode = SPI_MODE_SLAVE;
mbed_official 442:d916d321e60f 209 obj->nss = SPI_NSS_HARD_INPUT;
mbed_official 442:d916d321e60f 210 }
mbed_official 442:d916d321e60f 211
mbed_official 442:d916d321e60f 212 init_spi(obj);
mbed_official 442:d916d321e60f 213 }
mbed_official 442:d916d321e60f 214
mbed_official 442:d916d321e60f 215 void spi_frequency(spi_t *obj, int hz)
mbed_official 442:d916d321e60f 216 {
mbed_official 442:d916d321e60f 217 #if defined(TARGET_STM32F401RE) || defined(TARGET_STM32F401VC) || defined(TARGET_F407VG)
mbed_official 442:d916d321e60f 218 // Note: The frequencies are obtained with SPI1 clock = 84 MHz (APB2 clock)
mbed_official 442:d916d321e60f 219 if (hz < 600000) {
mbed_official 442:d916d321e60f 220 obj->br_presc = SPI_BAUDRATEPRESCALER_256; // 330 kHz
mbed_official 442:d916d321e60f 221 } else if ((hz >= 600000) && (hz < 1000000)) {
mbed_official 442:d916d321e60f 222 obj->br_presc = SPI_BAUDRATEPRESCALER_128; // 656 kHz
mbed_official 442:d916d321e60f 223 } else if ((hz >= 1000000) && (hz < 2000000)) {
mbed_official 442:d916d321e60f 224 obj->br_presc = SPI_BAUDRATEPRESCALER_64; // 1.3 MHz
mbed_official 442:d916d321e60f 225 } else if ((hz >= 2000000) && (hz < 5000000)) {
mbed_official 442:d916d321e60f 226 obj->br_presc = SPI_BAUDRATEPRESCALER_32; // 2.6 MHz
mbed_official 442:d916d321e60f 227 } else if ((hz >= 5000000) && (hz < 10000000)) {
mbed_official 442:d916d321e60f 228 obj->br_presc = SPI_BAUDRATEPRESCALER_16; // 5.25 MHz
mbed_official 442:d916d321e60f 229 } else if ((hz >= 10000000) && (hz < 21000000)) {
mbed_official 442:d916d321e60f 230 obj->br_presc = SPI_BAUDRATEPRESCALER_8; // 10.5 MHz
mbed_official 442:d916d321e60f 231 } else if ((hz >= 21000000) && (hz < 42000000)) {
mbed_official 442:d916d321e60f 232 obj->br_presc = SPI_BAUDRATEPRESCALER_4; // 21 MHz
mbed_official 442:d916d321e60f 233 } else { // >= 42000000
mbed_official 442:d916d321e60f 234 obj->br_presc = SPI_BAUDRATEPRESCALER_2; // 42 MHz
mbed_official 442:d916d321e60f 235 }
mbed_official 442:d916d321e60f 236 #elif defined(TARGET_STM32F405RG)
mbed_official 442:d916d321e60f 237 // Note: The frequencies are obtained with SPI1 clock = 48 MHz (APB2 clock)
mbed_official 442:d916d321e60f 238 if (obj->spi == SPI_1) {
mbed_official 442:d916d321e60f 239 if (hz < 375000) {
mbed_official 442:d916d321e60f 240 obj->br_presc = SPI_BAUDRATEPRESCALER_256; // 187.5 kHz
mbed_official 442:d916d321e60f 241 } else if ((hz >= 375000) && (hz < 750000)) {
mbed_official 442:d916d321e60f 242 obj->br_presc = SPI_BAUDRATEPRESCALER_128; // 375 kHz
mbed_official 442:d916d321e60f 243 } else if ((hz >= 750000) && (hz < 1500000)) {
mbed_official 442:d916d321e60f 244 obj->br_presc = SPI_BAUDRATEPRESCALER_64; // 0.75 MHz
mbed_official 442:d916d321e60f 245 } else if ((hz >= 1500000) && (hz < 3000000)) {
mbed_official 442:d916d321e60f 246 obj->br_presc = SPI_BAUDRATEPRESCALER_32; // 1.5 MHz
mbed_official 442:d916d321e60f 247 } else if ((hz >= 3000000) && (hz < 6000000)) {
mbed_official 442:d916d321e60f 248 obj->br_presc = SPI_BAUDRATEPRESCALER_16; // 3 MHz
mbed_official 442:d916d321e60f 249 } else if ((hz >= 6000000) && (hz < 12000000)) {
mbed_official 442:d916d321e60f 250 obj->br_presc = SPI_BAUDRATEPRESCALER_8; // 6 MHz
mbed_official 442:d916d321e60f 251 } else if ((hz >= 12000000) && (hz < 24000000)) {
mbed_official 442:d916d321e60f 252 obj->br_presc = SPI_BAUDRATEPRESCALER_4; // 12 MHz
mbed_official 442:d916d321e60f 253 } else { // >= 24000000
mbed_official 442:d916d321e60f 254 obj->br_presc = SPI_BAUDRATEPRESCALER_2; // 24 MHz
mbed_official 442:d916d321e60f 255 }
mbed_official 442:d916d321e60f 256 // Note: The frequencies are obtained with SPI2/3 clock = 48 MHz (APB1 clock)
mbed_official 442:d916d321e60f 257 } else if ((obj->spi == SPI_2) || (obj->spi == SPI_3)) {
mbed_official 442:d916d321e60f 258 if (hz < 375000) {
mbed_official 442:d916d321e60f 259 obj->br_presc = SPI_BAUDRATEPRESCALER_256; // 187.5 kHz
mbed_official 442:d916d321e60f 260 } else if ((hz >= 375000) && (hz < 750000)) {
mbed_official 442:d916d321e60f 261 obj->br_presc = SPI_BAUDRATEPRESCALER_128; // 375 kHz
mbed_official 442:d916d321e60f 262 } else if ((hz >= 750000) && (hz < 1500000)) {
mbed_official 442:d916d321e60f 263 obj->br_presc = SPI_BAUDRATEPRESCALER_64; // 0.75 MHz
mbed_official 442:d916d321e60f 264 } else if ((hz >= 1500000) && (hz < 3000000)) {
mbed_official 442:d916d321e60f 265 obj->br_presc = SPI_BAUDRATEPRESCALER_32; // 1.5 MHz
mbed_official 442:d916d321e60f 266 } else if ((hz >= 3000000) && (hz < 6000000)) {
mbed_official 442:d916d321e60f 267 obj->br_presc = SPI_BAUDRATEPRESCALER_16; // 3 MHz
mbed_official 442:d916d321e60f 268 } else if ((hz >= 6000000) && (hz < 12000000)) {
mbed_official 442:d916d321e60f 269 obj->br_presc = SPI_BAUDRATEPRESCALER_8; // 6 MHz
mbed_official 442:d916d321e60f 270 } else if ((hz >= 12000000) && (hz < 24000000)) {
mbed_official 442:d916d321e60f 271 obj->br_presc = SPI_BAUDRATEPRESCALER_4; // 12 MHz
mbed_official 442:d916d321e60f 272 } else { // >= 24000000
mbed_official 442:d916d321e60f 273 obj->br_presc = SPI_BAUDRATEPRESCALER_2; // 24 MHz
mbed_official 442:d916d321e60f 274 }
mbed_official 442:d916d321e60f 275 }
mbed_official 442:d916d321e60f 276 #elif defined(TARGET_STM32F411RE) || defined(TARGET_STM32F429ZI)
mbed_official 442:d916d321e60f 277 // Values depend of PCLK2: 100 MHz
mbed_official 442:d916d321e60f 278 if ((obj->spi == SPI_1) || (obj->spi == SPI_4) || (obj->spi == SPI_5)) {
mbed_official 442:d916d321e60f 279 if (hz < 700000) {
mbed_official 442:d916d321e60f 280 obj->br_presc = SPI_BAUDRATEPRESCALER_256; // 391 kHz
mbed_official 442:d916d321e60f 281 } else if ((hz >= 700000) && (hz < 1000000)) {
mbed_official 442:d916d321e60f 282 obj->br_presc = SPI_BAUDRATEPRESCALER_128; // 781 kHz
mbed_official 442:d916d321e60f 283 } else if ((hz >= 1000000) && (hz < 3000000)) {
mbed_official 442:d916d321e60f 284 obj->br_presc = SPI_BAUDRATEPRESCALER_64; // 1.56 MHz
mbed_official 442:d916d321e60f 285 } else if ((hz >= 3000000) && (hz < 6000000)) {
mbed_official 442:d916d321e60f 286 obj->br_presc = SPI_BAUDRATEPRESCALER_32; // 3.13 MHz
mbed_official 442:d916d321e60f 287 } else if ((hz >= 6000000) && (hz < 12000000)) {
mbed_official 442:d916d321e60f 288 obj->br_presc = SPI_BAUDRATEPRESCALER_16; // 6.25 MHz
mbed_official 442:d916d321e60f 289 } else if ((hz >= 12000000) && (hz < 25000000)) {
mbed_official 442:d916d321e60f 290 obj->br_presc = SPI_BAUDRATEPRESCALER_8; // 12.5 MHz
mbed_official 442:d916d321e60f 291 } else if ((hz >= 25000000) && (hz < 50000000)) {
mbed_official 442:d916d321e60f 292 obj->br_presc = SPI_BAUDRATEPRESCALER_4; // 25 MHz
mbed_official 442:d916d321e60f 293 } else { // >= 50000000
mbed_official 442:d916d321e60f 294 obj->br_presc = SPI_BAUDRATEPRESCALER_2; // 50 MHz
mbed_official 442:d916d321e60f 295 }
mbed_official 442:d916d321e60f 296 }
mbed_official 442:d916d321e60f 297
mbed_official 442:d916d321e60f 298 // Values depend of PCLK1: 50 MHz
mbed_official 442:d916d321e60f 299 if ((obj->spi == SPI_2) || (obj->spi == SPI_3)) {
mbed_official 442:d916d321e60f 300 if (hz < 400000) {
mbed_official 442:d916d321e60f 301 obj->br_presc = SPI_BAUDRATEPRESCALER_256; // 195 kHz
mbed_official 442:d916d321e60f 302 } else if ((hz >= 400000) && (hz < 700000)) {
mbed_official 442:d916d321e60f 303 obj->br_presc = SPI_BAUDRATEPRESCALER_128; // 391 kHz
mbed_official 442:d916d321e60f 304 } else if ((hz >= 700000) && (hz < 1000000)) {
mbed_official 442:d916d321e60f 305 obj->br_presc = SPI_BAUDRATEPRESCALER_64; // 781 MHz
mbed_official 442:d916d321e60f 306 } else if ((hz >= 1000000) && (hz < 3000000)) {
mbed_official 442:d916d321e60f 307 obj->br_presc = SPI_BAUDRATEPRESCALER_32; // 1.56 MHz
mbed_official 442:d916d321e60f 308 } else if ((hz >= 3000000) && (hz < 6000000)) {
mbed_official 442:d916d321e60f 309 obj->br_presc = SPI_BAUDRATEPRESCALER_16; // 3.13 MHz
mbed_official 442:d916d321e60f 310 } else if ((hz >= 6000000) && (hz < 12000000)) {
mbed_official 442:d916d321e60f 311 obj->br_presc = SPI_BAUDRATEPRESCALER_8; // 6.25 MHz
mbed_official 442:d916d321e60f 312 } else if ((hz >= 12000000) && (hz < 25000000)) {
mbed_official 442:d916d321e60f 313 obj->br_presc = SPI_BAUDRATEPRESCALER_4; // 12.5 MHz
mbed_official 442:d916d321e60f 314 } else { // >= 25000000
mbed_official 442:d916d321e60f 315 obj->br_presc = SPI_BAUDRATEPRESCALER_2; // 25 MHz
mbed_official 442:d916d321e60f 316 }
mbed_official 442:d916d321e60f 317 }
mbed_official 442:d916d321e60f 318 #endif
mbed_official 442:d916d321e60f 319 init_spi(obj);
mbed_official 442:d916d321e60f 320 }
mbed_official 442:d916d321e60f 321
mbed_official 442:d916d321e60f 322 static inline int ssp_readable(spi_t *obj)
mbed_official 442:d916d321e60f 323 {
mbed_official 442:d916d321e60f 324 int status;
mbed_official 442:d916d321e60f 325 SpiHandle.Instance = (SPI_TypeDef *)(obj->spi);
mbed_official 442:d916d321e60f 326 // Check if data is received
mbed_official 442:d916d321e60f 327 status = ((__HAL_SPI_GET_FLAG(&SpiHandle, SPI_FLAG_RXNE) != RESET) ? 1 : 0);
mbed_official 442:d916d321e60f 328 return status;
mbed_official 442:d916d321e60f 329 }
mbed_official 442:d916d321e60f 330
mbed_official 442:d916d321e60f 331 static inline int ssp_writeable(spi_t *obj)
mbed_official 442:d916d321e60f 332 {
mbed_official 442:d916d321e60f 333 int status;
mbed_official 442:d916d321e60f 334 SpiHandle.Instance = (SPI_TypeDef *)(obj->spi);
mbed_official 442:d916d321e60f 335 // Check if data is transmitted
mbed_official 442:d916d321e60f 336 status = ((__HAL_SPI_GET_FLAG(&SpiHandle, SPI_FLAG_TXE) != RESET) ? 1 : 0);
mbed_official 442:d916d321e60f 337 return status;
mbed_official 442:d916d321e60f 338 }
mbed_official 442:d916d321e60f 339
mbed_official 442:d916d321e60f 340 static inline void ssp_write(spi_t *obj, int value)
mbed_official 442:d916d321e60f 341 {
mbed_official 442:d916d321e60f 342 SPI_TypeDef *spi = (SPI_TypeDef *)(obj->spi);
mbed_official 442:d916d321e60f 343 while (!ssp_writeable(obj));
mbed_official 442:d916d321e60f 344 spi->DR = (uint16_t)value;
mbed_official 442:d916d321e60f 345 }
mbed_official 442:d916d321e60f 346
mbed_official 442:d916d321e60f 347 static inline int ssp_read(spi_t *obj)
mbed_official 442:d916d321e60f 348 {
mbed_official 442:d916d321e60f 349 SPI_TypeDef *spi = (SPI_TypeDef *)(obj->spi);
mbed_official 442:d916d321e60f 350 while (!ssp_readable(obj));
mbed_official 442:d916d321e60f 351 return (int)spi->DR;
mbed_official 442:d916d321e60f 352 }
mbed_official 442:d916d321e60f 353
mbed_official 442:d916d321e60f 354 static inline int ssp_busy(spi_t *obj)
mbed_official 442:d916d321e60f 355 {
mbed_official 442:d916d321e60f 356 int status;
mbed_official 442:d916d321e60f 357 SpiHandle.Instance = (SPI_TypeDef *)(obj->spi);
mbed_official 442:d916d321e60f 358 status = ((__HAL_SPI_GET_FLAG(&SpiHandle, SPI_FLAG_BSY) != RESET) ? 1 : 0);
mbed_official 442:d916d321e60f 359 return status;
mbed_official 442:d916d321e60f 360 }
mbed_official 442:d916d321e60f 361
mbed_official 442:d916d321e60f 362 int spi_master_write(spi_t *obj, int value)
mbed_official 442:d916d321e60f 363 {
mbed_official 442:d916d321e60f 364 ssp_write(obj, value);
mbed_official 442:d916d321e60f 365 return ssp_read(obj);
mbed_official 442:d916d321e60f 366 }
mbed_official 442:d916d321e60f 367
mbed_official 442:d916d321e60f 368 int spi_slave_receive(spi_t *obj)
mbed_official 442:d916d321e60f 369 {
mbed_official 442:d916d321e60f 370 return ((ssp_readable(obj) && !ssp_busy(obj)) ? 1 : 0);
mbed_official 442:d916d321e60f 371 };
mbed_official 442:d916d321e60f 372
mbed_official 442:d916d321e60f 373 int spi_slave_read(spi_t *obj)
mbed_official 442:d916d321e60f 374 {
mbed_official 442:d916d321e60f 375 SPI_TypeDef *spi = (SPI_TypeDef *)(obj->spi);
mbed_official 442:d916d321e60f 376 while (!ssp_readable(obj));
mbed_official 442:d916d321e60f 377 return (int)spi->DR;
mbed_official 442:d916d321e60f 378 }
mbed_official 442:d916d321e60f 379
mbed_official 442:d916d321e60f 380 void spi_slave_write(spi_t *obj, int value)
mbed_official 442:d916d321e60f 381 {
mbed_official 442:d916d321e60f 382 SPI_TypeDef *spi = (SPI_TypeDef *)(obj->spi);
mbed_official 442:d916d321e60f 383 while (!ssp_writeable(obj));
mbed_official 442:d916d321e60f 384 spi->DR = (uint16_t)value;
mbed_official 442:d916d321e60f 385 }
mbed_official 442:d916d321e60f 386
mbed_official 442:d916d321e60f 387 int spi_busy(spi_t *obj)
mbed_official 442:d916d321e60f 388 {
mbed_official 442:d916d321e60f 389 return ssp_busy(obj);
mbed_official 442:d916d321e60f 390 }
mbed_official 442:d916d321e60f 391
mbed_official 442:d916d321e60f 392 #endif